diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
new file mode 100644
index 000000000..29507c8f0
--- /dev/null
+++ b/.github/workflows/main.yml
@@ -0,0 +1,244 @@
+# Continuous integration and pull request validation builds for the
+# master and maintenance branches.
+name: CI Build
+
+on:
+  push:
+    branches: [ master, maint/* ]
+  pull_request:
+    branches: [ master, maint/* ]
+
+env:
+  docker-registry: docker.pkg.github.com
+  docker-config-path: azure-pipelines/docker
+
+jobs:
+  # Build the docker container images that we will use for our Linux
+  # builds.  This will identify the last commit to the repository that
+  # updated the docker images, and try to download the image tagged with
+  # that sha.  If it does not exist, we'll do a docker build and push
+  # the image up to GitHub Packages for the actual CI/CD runs.  We tag
+  # with both the sha and "latest" so that the subsequent runs need not
+  # know the sha.  Only do this on CI builds (when the event is a "push")
+  # because PR builds from forks lack permission to write packages.
+  build_containers:
+    name: Create docker image
+    strategy:
+      matrix:
+        container:
+        - xenial
+        - bionic
+        - focal
+        - docurium
+    runs-on: ubuntu-latest
+    steps:
+    - name: Check out repository
+      uses: actions/checkout@v2
+      with:
+        fetch-depth: 0
+      if: github.event_name == 'push'
+    - name: Download existing container
+      run: azure-pipelines/getcontainer.sh ${{ env.docker-config-path }}/${{ matrix.container }}
+      env:
+        DOCKER_REGISTRY: ${{ env.docker-registry }}
+        GITHUB_TOKEN: ${{ secrets.github_token }}
+      if: github.event_name == 'push'
+    - name: Build and publish image
+      run: |
+        docker build -t ${{ env.docker-registry-container-sha }} --build-arg BASE=${{ matrix.container.base }} -f ${{ matrix.container }} .
+        docker push ${{ env.docker-registry-container-sha }}
+      working-directory: ${{ env.docker-config-path }}
+      if: github.event_name == 'push' && env.docker-container-exists != 'true'
+
+  # Run our CI/CD builds.  We build a matrix with the various build targets
+  # and their details.  Then we build either in a docker container (Linux)
+  # or on the actual hosts (macOS, Windows).
+  build:
+    name: Build
+    needs: [build_containers]
+    strategy:
+      matrix:
+        platform:
+        - # Xenial, GCC, OpenSSL
+          image: xenial
+          env:
+            CC: gcc
+            CMAKE_GENERATOR: Ninja
+            CMAKE_OPTIONS: -DUSE_HTTPS=OpenSSL -DREGEX_BACKEND=builtin -DDEPRECATE_HARD=ON -DUSE_LEAK_CHECKER=valgrind -DUSE_GSSAPI=ON
+          os: ubuntu-latest
+        - # Xenial, GCC, mbedTLS
+          image: xenial
+          env:
+            CC: gcc
+            CMAKE_GENERATOR: Ninja
+            CMAKE_OPTIONS: -DUSE_HTTPS=mbedTLS -DUSE_SHA1=HTTPS -DDEPRECATE_HARD=ON -DUSE_LEAK_CHECKER=valgrind -DUSE_GSSAPI=ON
+          os: ubuntu-latest
+        - # Xenial, Clang, OpenSSL
+          image: xenial
+          env:
+            CC: clang
+            CMAKE_GENERATOR: Ninja
+            CMAKE_OPTIONS: -DUSE_HTTPS=OpenSSL -DDEPRECATE_HARD=ON -DUSE_LEAK_CHECKER=valgrind -DUSE_GSSAPI=ON
+          os: ubuntu-latest
+        - # Xenial, Clang, mbedTLS
+          image: xenial
+          env:
+            CC: clang
+            CMAKE_OPTIONS: -DUSE_HTTPS=mbedTLS -DUSE_SHA1=HTTPS -DREGEX_BACKEND=pcre -DDEPRECATE_HARD=ON -DUSE_LEAK_CHECKER=valgrind -DUSE_GSSAPI=ON
+            CMAKE_GENERATOR: Ninja
+          os: ubuntu-latest
+        - # Focal, Clang 10, mbedTLS, MemorySanitizer
+          image: focal
+          env:
+            CC: clang-10
+            CFLAGS: -fsanitize=memory -fsanitize-memory-track-origins=2 -fsanitize-blacklist=/home/libgit2/source/script/sanitizers.supp -fno-optimize-sibling-calls -fno-omit-frame-pointer
+            CMAKE_OPTIONS: -DCMAKE_PREFIX_PATH=/usr/local/msan -DUSE_HTTPS=mbedTLS -DUSE_SHA1=HTTPS -DREGEX_BACKEND=pcre -DDEPRECATE_HARD=ON -DUSE_BUNDLED_ZLIB=ON
+            CMAKE_GENERATOR: Ninja
+            SKIP_SSH_TESTS: true
+            SKIP_NEGOTIATE_TESTS: true
+            ASAN_SYMBOLIZER_PATH: /usr/bin/llvm-symbolizer-10
+          os: ubuntu-latest
+        - # Focal, Clang 10, OpenSSL, UndefinedBehaviorSanitizer
+          image: focal
+          env:
+            CC: clang-10
+            CFLAGS: -fsanitize=undefined,nullability -fno-sanitize-recover=undefined,nullability -fsanitize-blacklist=/home/libgit2/source/script/sanitizers.supp -fno-optimize-sibling-calls -fno-omit-frame-pointer
+            CMAKE_OPTIONS: -DCMAKE_PREFIX_PATH=/usr/local -DUSE_HTTPS=OpenSSL -DUSE_SHA1=HTTPS -DREGEX_BACKEND=pcre -DDEPRECATE_HARD=ON -DUSE_BUNDLED_ZLIB=ON
+            CMAKE_GENERATOR: Ninja
+            SKIP_SSH_TESTS: true
+            SKIP_NEGOTIATE_TESTS: true
+            ASAN_SYMBOLIZER_PATH: /usr/bin/llvm-symbolizer-10
+          os: ubuntu-latest
+        - # macOS
+          os: macos-10.15
+          env:
+            CC: clang
+            CMAKE_OPTIONS: -DREGEX_BACKEND=regcomp_l -DDEPRECATE_HARD=ON -DUSE_LEAK_CHECKER=leaks -DUSE_GSSAPI=ON
+            CMAKE_GENERATOR: Ninja
+            PKG_CONFIG_PATH: /usr/local/opt/openssl/lib/pkgconfig
+            SKIP_SSH_TESTS: true
+            SKIP_NEGOTIATE_TESTS: true
+          setup-script: osx
+        - # Windows amd64 Visual Studio
+          os: windows-2019
+          env:
+            ARCH: amd64
+            CMAKE_GENERATOR: Visual Studio 16 2019
+            CMAKE_OPTIONS: -A x64 -DMSVC_CRTDBG=ON -DDEPRECATE_HARD=ON
+            SKIP_SSH_TESTS: true
+            SKIP_NEGOTIATE_TESTS: true
+        - # Windows x86 Visual Studio
+          os: windows-2019
+          env:
+            ARCH: x86
+            CMAKE_GENERATOR: Visual Studio 16 2019
+            CMAKE_OPTIONS: -A Win32 -DMSVC_CRTDBG=ON -DDEPRECATE_HARD=ON -DUSE_SHA1=HTTPS -DUSE_BUNDLED_ZLIB=ON
+            SKIP_SSH_TESTS: true
+            SKIP_NEGOTIATE_TESTS: true
+        - # Windows amd64 mingw
+          os: windows-2019
+          setup-script: mingw
+          env:
+            ARCH: amd64
+            CMAKE_GENERATOR: MinGW Makefiles
+            CMAKE_OPTIONS: -DDEPRECATE_HARD=ON
+            BUILD_TEMP: D:\Temp
+            BUILD_PATH: D:\Temp\mingw64\bin;C:\Windows\system32;C:\Windows;C:\Windows\System32\Wbem;C:\Program Files (x86)\CMake\bin
+            SKIP_SSH_TESTS: true
+            SKIP_NEGOTIATE_TESTS: true
+        - # Windows x86 mingw
+          os: windows-2019
+          setup-script: mingw
+          env:
+            ARCH: x86
+            CMAKE_GENERATOR: MinGW Makefiles
+            CMAKE_OPTIONS: -DDEPRECATE_HARD=ON
+            BUILD_TEMP: D:\Temp
+            BUILD_PATH: D:\Temp\mingw32\bin;C:\Windows\system32;C:\Windows;C:\Windows\System32\Wbem;C:\Program Files (x86)\CMake\bin
+            SKIP_SSH_TESTS: true
+            SKIP_NEGOTIATE_TESTS: true
+      fail-fast: false
+    env: ${{ matrix.platform.env }}
+    runs-on: ${{ matrix.platform.os }}
+    steps:
+    - name: Check out repository
+      uses: actions/checkout@v2
+      with:
+        fetch-depth: 0
+    - name: Set up build environment
+      run: azure-pipelines/setup-${{ matrix.platform.setup-script }}.sh
+      shell: bash
+      if: matrix.platform.setup-script != ''
+    - name: Download container
+      run: azure-pipelines/getcontainer.sh ${{ env.docker-config-path }}/${{ matrix.platform.image }}
+      env:
+        DOCKER_REGISTRY: ${{ env.docker-registry }}
+        GITHUB_TOKEN: ${{ secrets.github_token }}
+      if: matrix.platform.image != ''
+    - name: Create container
+      run: docker build -t ${{ env.docker-registry-container-sha }} -f ${{ matrix.platform.image }} .
+      working-directory: ${{ env.docker-config-path }}
+      if: matrix.platform.image != '' && env.docker-container-exists != 'true'
+    - name: Build and test
+      run: |
+        export GITTEST_NEGOTIATE_PASSWORD="${{ secrets.GITTEST_NEGOTIATE_PASSWORD }}"
+
+        if [ -n "${{ matrix.platform.image }}" ]; then
+          docker run \
+              --rm \
+              -v "$(pwd):/home/libgit2/source" \
+              -w /home/libgit2/source \
+              -e ASAN_SYMBOLIZER_PATH \
+              -e CC \
+              -e CFLAGS \
+              -e CMAKE_GENERATOR \
+              -e CMAKE_OPTIONS \
+              -e GITTEST_NEGOTIATE_PASSWORD \
+              -e PKG_CONFIG_PATH \
+              -e SKIP_NEGOTIATE_TESTS \
+              -e SKIP_SSH_TESTS \
+              ${{ env.docker-registry-container-sha }} \
+              /bin/bash -c "mkdir build && cd build && ../azure-pipelines/build.sh && ../azure-pipelines/test.sh"
+        else
+          mkdir build && cd build
+          ../azure-pipelines/build.sh
+          ../azure-pipelines/test.sh
+        fi
+      shell: bash
+
+  # Generate documentation using docurium.  We'll upload the documentation
+  # as a build artifact so that it can be reviewed as part of a pull
+  # request or in a forked build.  For CI builds in the main repository's
+  # master branch, we'll push the gh-pages branch back up so that it is
+  # published to our documentation site.
+  documentation:
+    name: Generate documentation
+    needs: [build_containers]
+    runs-on: ubuntu-latest
+    steps:
+    - name: Check out repository
+      uses: actions/checkout@v2
+      with:
+        fetch-depth: 0
+    - name: Generate documentation
+      run: |
+        git config user.name 'Documentation Generation'
+        git config user.email 'libgit2@users.noreply.github.com'
+        git branch gh-pages origin/gh-pages
+        docker login https://${{ env.docker-registry }} -u ${{ github.actor }} -p ${{ github.token }}
+        docker run \
+            --rm \
+            -v "$(pwd):/home/libgit2/source" \
+            -w /home/libgit2/source \
+            ${{ env.docker-registry }}/${{ github.repository }}/docurium:latest \
+            cm doc api.docurium
+        git checkout gh-pages
+        zip --exclude .git/\* --exclude .gitignore --exclude .gitattributes -r api-documentation.zip .
+    - uses: actions/upload-artifact@v2
+      name: Upload artifact
+      with:
+        name: api-documentation
+        path: api-documentation.zip
+    - name: Push documentation branch
+      run: git push origin gh-pages
+      if: github.event_name == 'push' && github.repository == 'libgit2/libgit2'
diff --git a/.gitignore b/.gitignore
index dec3dca06..b38b7e16e 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,37 +1,7 @@
-/tests/clar.suite
-/tests/clar.suite.rule
-/tests/.clarcache
-/apidocs
-/trash-*.exe
-/libgit2.pc
-/config.mak
-*.o
-*.a
-*.exe
-*.gcda
-*.gcno
-*.gcov
-.lock-wafbuild
-.waf*
 build/
-build-amiga/
-tests/tmp/
-msvc/Debug/
-msvc/Release/
-*.sln
-*.suo
-*.vc*proj*
-*.sdf
-*.opensdf
-*.aps
-*.cmake
-!cmake/Modules/*.cmake
 .DS_Store
 *~
 .*.swp
 tags
-mkmf.log
-*.profdata
-*.profraw
 CMakeSettings.json
 .vs
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 826415893..b6f23cf6b 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -11,21 +11,12 @@
 # Install:
 # > cmake --build . --target install
 
-PROJECT(libgit2 C)
 CMAKE_MINIMUM_REQUIRED(VERSION 3.5.1)
-CMAKE_POLICY(SET CMP0015 NEW)
-IF(POLICY CMP0051)
-	CMAKE_POLICY(SET CMP0051 NEW)
-ENDIF()
-IF(POLICY CMP0042)
-	CMAKE_POLICY(SET CMP0042 NEW)
-ENDIF()
-IF(POLICY CMP0054)
-	CMAKE_POLICY(SET CMP0054 NEW)
-ENDIF()
+
+project(libgit2 VERSION "1.1.0" LANGUAGES C)
 
 # Add find modules to the path
-SET(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} "${libgit2_SOURCE_DIR}/cmake/Modules/")
+set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} "${libgit2_SOURCE_DIR}/cmake/")
 
 INCLUDE(CheckLibraryExists)
 INCLUDE(CheckFunctionExists)
@@ -49,8 +40,6 @@ OPTION(THREADSAFE			"Build libgit2 as threadsafe"				 ON)
 OPTION(BUILD_CLAR			"Build Tests using the Clar suite"			 ON)
 OPTION(BUILD_EXAMPLES			"Build library usage example apps"			OFF)
 OPTION(BUILD_FUZZERS			"Build the fuzz targets"				OFF)
-OPTION(TAGS				"Generate tags"						OFF)
-OPTION(PROFILE				"Generate profiling information"			OFF)
 OPTION(ENABLE_TRACE			"Enables tracing support"				ON)
 OPTION(LIBGIT2_FILENAME			"Name of the produced binary"				OFF)
 OPTION(USE_SSH				"Link with libssh2 to enable SSH support"		 ON)
@@ -104,16 +93,6 @@ IF(MSVC)
 	OPTION(MSVC_CRTDBG 		"Enable CRTDBG memory leak reporting"			OFF)
 ENDIF()
 
-FILE(STRINGS "${libgit2_SOURCE_DIR}/include/git2/version.h" GIT2_HEADER REGEX "^#define LIBGIT2_VERSION \"[^\"]*\"$")
-
-STRING(REGEX REPLACE "^.*LIBGIT2_VERSION \"([0-9]+).*$" "\\1" LIBGIT2_VERSION_MAJOR "${GIT2_HEADER}")
-STRING(REGEX REPLACE "^.*LIBGIT2_VERSION \"[0-9]+\\.([0-9]+).*$" "\\1" LIBGIT2_VERSION_MINOR  "${GIT2_HEADER}")
-STRING(REGEX REPLACE "^.*LIBGIT2_VERSION \"[0-9]+\\.[0-9]+\\.([0-9]+).*$" "\\1" LIBGIT2_VERSION_REV "${GIT2_HEADER}")
-SET(LIBGIT2_VERSION_STRING "${LIBGIT2_VERSION_MAJOR}.${LIBGIT2_VERSION_MINOR}.${LIBGIT2_VERSION_REV}")
-
-FILE(STRINGS "${libgit2_SOURCE_DIR}/include/git2/version.h" GIT2_HEADER_SOVERSION REGEX "^#define LIBGIT2_SOVERSION \"([0-9.]+)\"$")
-STRING(REGEX REPLACE "^.*LIBGIT2_SOVERSION \"([0-9.]+)\"$" "\\1" LIBGIT2_SOVERSION "${GIT2_HEADER_SOVERSION}")
-
 IF (DEPRECATE_HARD)
 	ADD_DEFINITIONS(-DGIT_DEPRECATE_HARD)
 ENDIF()
@@ -137,6 +116,11 @@ IF (MSVC)
 	# /Gd - explicitly set cdecl calling convention
 	SET(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} /Gd")
 
+	IF (NOT (MSVC_VERSION LESS 1900))
+		# /guard:cf - Enable Control Flow Guard
+		SET(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} /guard:cf")
+	ENDIF()
+
 	IF (STATIC_CRT)
 		SET(CRT_FLAG_DEBUG "/MTd")
 		SET(CRT_FLAG_RELEASE "/MT")
@@ -181,7 +165,12 @@ IF (MSVC)
 	# /NXCOMPAT - Data execution prevention (DEP)
 	# /LARGEADDRESSAWARE - >2GB user address space on x86
 	# /VERSION - Embed version information in PE header
-	SET(CMAKE_EXE_LINKER_FLAGS "/DYNAMICBASE /NXCOMPAT /LARGEADDRESSAWARE /VERSION:${LIBGIT2_VERSION_MAJOR}.${LIBGIT2_VERSION_MINOR}")
+	SET(CMAKE_EXE_LINKER_FLAGS "/DYNAMICBASE /NXCOMPAT /LARGEADDRESSAWARE /VERSION:${libgit2_VERSION_MAJOR}.${libgit2_VERSION_MINOR}")
+
+	IF (NOT (MSVC_VERSION LESS 1900))
+		# /GUARD:CF - Enable Control Flow Guard
+		SET(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} /GUARD:CF")
+	ENDIF()
 
 	# /DEBUG - Create a PDB
 	# /LTCG - Link time code generation (whole program optimization)
@@ -232,35 +221,27 @@ ELSE ()
 		ADD_DEFINITIONS(-D__USE_MINGW_ANSI_STDIO=1)
 	ENDIF ()
 
-	ENABLE_WARNINGS(documentation)
-	DISABLE_WARNINGS(missing-field-initializers)
-	ENABLE_WARNINGS(strict-aliasing)
-	ENABLE_WARNINGS(strict-prototypes)
-	ENABLE_WARNINGS(declaration-after-statement)
-	ENABLE_WARNINGS(shift-count-overflow)
-	ENABLE_WARNINGS(unused-const-variable)
-	ENABLE_WARNINGS(unused-function)
-	ENABLE_WARNINGS(int-conversion)
+	enable_warnings(documentation)
+	disable_warnings(documentation-deprecated-sync)
+	disable_warnings(missing-field-initializers)
+	enable_warnings(strict-aliasing)
+	enable_warnings(strict-prototypes)
+	enable_warnings(declaration-after-statement)
+	enable_warnings(shift-count-overflow)
+	enable_warnings(unused-const-variable)
+	enable_warnings(unused-function)
+	enable_warnings(int-conversion)
 
 	# MinGW uses gcc, which expects POSIX formatting for printf, but
 	# uses the Windows C library, which uses its own format specifiers.
 	# Disable format specifier warnings.
-	IF(MINGW)
-		DISABLE_WARNINGS(format)
-		DISABLE_WARNINGS(format-security)
-	ELSE()
-		ENABLE_WARNINGS(format)
-		ENABLE_WARNINGS(format-security)
-	ENDIF()
-
-	IF("${CMAKE_C_COMPILER_ID}" STREQUAL "Clang")
-		DISABLE_WARNINGS(documentation-deprecated-sync)
-	ENDIF()
-
-	IF (PROFILE)
-		SET(CMAKE_C_FLAGS "-pg ${CMAKE_C_FLAGS}")
-		SET(CMAKE_EXE_LINKER_FLAGS "-pg ${CMAKE_EXE_LINKER_FLAGS}")
-	ENDIF ()
+	if(MINGW)
+		disable_warnings(format)
+		disable_warnings(format-security)
+	else()
+		enable_warnings(format)
+		enable_warnings(format-security)
+	endif()
 ENDIF()
 
 # Ensure that MinGW provides the correct header files.
@@ -300,25 +281,6 @@ IF (BUILD_CLAR)
 	ADD_SUBDIRECTORY(tests)
 ENDIF ()
 
-IF (TAGS)
-	FIND_PROGRAM(CTAGS ctags)
-	IF (NOT CTAGS)
-		MESSAGE(FATAL_ERROR "Could not find ctags command")
-	ENDIF ()
-
-	FILE(GLOB_RECURSE SRC_ALL *.[ch])
-
-	ADD_CUSTOM_COMMAND(
-		OUTPUT tags
-		COMMAND ${CTAGS} -a ${SRC_ALL}
-		DEPENDS ${SRC_ALL}
-	)
-	ADD_CUSTOM_TARGET(
-		do_tags ALL
-		DEPENDS tags
-	)
-ENDIF ()
-
 IF (BUILD_EXAMPLES)
 	ADD_SUBDIRECTORY(examples)
 ENDIF ()
diff --git a/README.md b/README.md
index b5f04403b..a91f16067 100644
--- a/README.md
+++ b/README.md
@@ -4,7 +4,7 @@ libgit2 - the Git linkable library
 | Build Status | |
 | ------------ | - |
 | **master** branch CI builds | [![Azure Pipelines Build Status](https://dev.azure.com/libgit2/libgit2/_apis/build/status/libgit2?branchName=master)](https://dev.azure.com/libgit2/libgit2/_build/latest?definitionId=7&branchName=master)   |
-| **v0.99 branch** CI builds | [![Azure Pipelines Build Status](https://dev.azure.com/libgit2/libgit2/_apis/build/status/libgit2?branchName=maint/v0.99)](https://dev.azure.com/libgit2/libgit2/_build/latest?definitionId=7&branchName=maint/v0.99) |
+| **v1.0 branch** CI builds | [![Azure Pipelines Build Status](https://dev.azure.com/libgit2/libgit2/_apis/build/status/libgit2?branchName=maint/v1.0)](https://dev.azure.com/libgit2/libgit2/_build/latest?definitionId=7&branchName=maint/v1.0) |
 | **v0.28 branch** CI builds | [![Azure Pipelines Build Status](https://dev.azure.com/libgit2/libgit2/_apis/build/status/libgit2?branchName=maint/v0.28)](https://dev.azure.com/libgit2/libgit2/_build/latest?definitionId=7&branchName=maint/v0.28) |
 | **Nightly** builds | [![Azure Pipelines Build Status](https://libgit2.visualstudio.com/libgit2/_apis/build/status/nightly?branchName=master&label=Full+Build)](https://libgit2.visualstudio.com/libgit2/_build/latest?definitionId=9&branchName=master) [![Coverity Build Status](https://dev.azure.com/libgit2/libgit2/_apis/build/status/coverity?branchName=master&label=Coverity+Build)](https://dev.azure.com/libgit2/libgit2/_build/latest?definitionId=21?branchName=master) [![Coverity Scan Build Status](https://scan.coverity.com/projects/639/badge.svg)](https://scan.coverity.com/projects/639) |
 
@@ -47,6 +47,7 @@ Table of Contents
     * [Compiler and linker options](#compiler-and-linker-options)
     * [MacOS X](#macos-x)
     * [Android](#android)
+    * [MinGW](#mingw)
 * [Language Bindings](#language-bindings)
 * [How Can I Contribute?](#how-can-i-contribute)
 * [License](#license)
@@ -304,6 +305,20 @@ with full path to the toolchain):
 Add `-DCMAKE_TOOLCHAIN_FILE={pathToToolchainFile}` to cmake command
 when configuring.
 
+MinGW
+-----
+
+If you want to build the library in MinGW environment with SSH support enabled,
+you may need to pass `-DCMAKE_LIBRARY_PATH="${MINGW_PREFIX}/${MINGW_CHOST}/lib/"` flag
+to CMake when configuring. This is because CMake cannot find the Win32 libraries in
+MinGW folders by default and you might see an error message stating that CMake
+could not resolve `ws2_32` library during configuration.
+
+Another option would be to install `msys2-w32api-runtime` package before configuring.
+This package installs the Win32 libraries into `/usr/lib` folder which is by default
+recognized as the library path by CMake. Please note though that this package is meant
+for MSYS subsystem which is different from MinGW.
+
 Language Bindings
 ==================================
 
diff --git a/azure-pipelines.yml b/azure-pipelines.yml
index 20335b33a..f3690b8ec 100644
--- a/azure-pipelines.yml
+++ b/azure-pipelines.yml
@@ -96,7 +96,7 @@ jobs:
     parameters:
       environmentVariables:
         CMAKE_GENERATOR: Visual Studio 15 2017
-        CMAKE_OPTIONS: -A x64 -DMSVC_CRTDBG=ON -DDEPRECATE_HARD=ON
+        CMAKE_OPTIONS: -A x64 -DMSVC_CRTDBG=ON -DDEPRECATE_HARD=ON -DUSE_BUNDLED_ZLIB=ON
         SKIP_SSH_TESTS: true
         SKIP_NEGOTIATE_TESTS: true
 
@@ -109,7 +109,7 @@ jobs:
     parameters:
       environmentVariables:
         CMAKE_GENERATOR: Visual Studio 15 2017
-        CMAKE_OPTIONS: -A Win32 -DMSVC_CRTDBG=ON -DDEPRECATE_HARD=ON -DUSE_SHA1=HTTPS
+        CMAKE_OPTIONS: -A Win32 -DMSVC_CRTDBG=ON -DDEPRECATE_HARD=ON -DUSE_SHA1=HTTPS -DUSE_BUNDLED_ZLIB=ON
         SKIP_SSH_TESTS: true
         SKIP_NEGOTIATE_TESTS: true
 
@@ -151,40 +151,3 @@ jobs:
         CMAKE_OPTIONS: -DDEPRECATE_HARD=ON
         SKIP_SSH_TESTS: true
         SKIP_NEGOTIATE_TESTS: true
-
-- job: documentation
-  displayName: 'Generate Documentation'
-  pool:
-    vmImage: 'ubuntu-18.04'
-  steps:
-  - script: |
-      cd $(Build.SourcesDirectory)/azure-pipelines/docker
-      docker build -t libgit2/docurium --build-arg BASE=ubuntu:trusty -f docurium .
-    displayName: 'Build Docker image'
-  - script: |
-      git config user.name 'Documentation Generation'
-      git config user.email 'libgit2@users.noreply.github.com'
-      git branch gh-pages origin/gh-pages
-      docker run --rm -v $(Build.SourcesDirectory):/home/libgit2/source -w /home/libgit2/source libgit2/docurium:latest cm doc api.docurium
-      git checkout gh-pages
-      cp -R * '$(Build.BinariesDirectory)'
-    displayName: 'Generate Documentation'
-  - task: archivefiles@2
-    displayName: 'Archive Documentation'
-    inputs:
-      rootFolderOrFile: '$(Build.BinariesDirectory)'
-      includeRootFolder: false
-      archiveFile: '$(Build.ArtifactStagingDirectory)/api-documentation.zip'
-  - task: publishbuildartifacts@1
-    displayName: 'Upload Documentation Artifact'
-    inputs:
-      pathToPublish: '$(Build.ArtifactStagingDirectory)'
-      artifactName: 'docs'
-  - script: |
-      git remote -v
-      echo 'machine github.com' > ~/.netrc
-      echo 'login $(GITHUB_USERNAME)' >> ~/.netrc
-      echo 'password $(GITHUB_PAT)' >> ~/.netrc
-      git push origin gh-pages
-    displayName: 'Publish Documentation'
-    condition: and(eq(variables['Build.Repository.Name'], 'libgit2/libgit2'), eq(variables['Build.Reason'], 'IndividualCI'))
diff --git a/azure-pipelines/build.sh b/azure-pipelines/build.sh
index 27e2f3e38..c230e67d6 100755
--- a/azure-pipelines/build.sh
+++ b/azure-pipelines/build.sh
@@ -13,6 +13,10 @@ BUILD_PATH=${BUILD_PATH:=$PATH}
 CMAKE=$(which cmake)
 CMAKE_GENERATOR=${CMAKE_GENERATOR:-Unix Makefiles}
 
+if [[ "$(uname -s)" == MINGW* ]]; then
+	BUILD_PATH=$(cygpath "$BUILD_PATH")
+fi
+
 indent() { sed "s/^/    /"; }
 
 echo "Source directory: ${SOURCE_DIR}"
@@ -33,11 +37,18 @@ echo "Kernel version:"
 uname -a 2>&1 | indent
 
 echo "CMake version:"
-env PATH="$BUILD_PATH" "$CMAKE" --version 2>&1 | indent
+env PATH="${BUILD_PATH}" "${CMAKE}" --version 2>&1 | indent
 
-if test -n "$CC"; then
+if test -n "${CC}"; then
 	echo "Compiler version:"
-	"$CC" --version 2>&1 | indent
+	"${CC}" --version 2>&1 | indent
+fi
+echo "Environment:"
+if test -n "${CC}"; then
+	echo "CC=${CC}" | indent
+fi
+if test -n "${CFLAGS}"; then
+	echo "CFLAGS=${CFLAGS}" | indent
 fi
 echo ""
 
@@ -45,12 +56,12 @@ echo "##########################################################################
 echo "## Configuring build environment"
 echo "##############################################################################"
 
-echo cmake ${SOURCE_DIR} -DENABLE_WERROR=ON -DBUILD_EXAMPLES=ON -DBUILD_FUZZERS=ON -DUSE_STANDALONE_FUZZERS=ON -G \"${CMAKE_GENERATOR}\" ${CMAKE_OPTIONS}
-env PATH="$BUILD_PATH" "$CMAKE" ${SOURCE_DIR} -DENABLE_WERROR=ON -DBUILD_EXAMPLES=ON -DBUILD_FUZZERS=ON -DUSE_STANDALONE_FUZZERS=ON -G "${CMAKE_GENERATOR}" ${CMAKE_OPTIONS}
+echo cmake -DENABLE_WERROR=ON -DBUILD_EXAMPLES=ON -DBUILD_FUZZERS=ON -DUSE_STANDALONE_FUZZERS=ON -G \"${CMAKE_GENERATOR}\" ${CMAKE_OPTIONS} -S \"${SOURCE_DIR}\"
+env PATH="${BUILD_PATH}" "${CMAKE}" -DENABLE_WERROR=ON -DBUILD_EXAMPLES=ON -DBUILD_FUZZERS=ON -DUSE_STANDALONE_FUZZERS=ON -G "${CMAKE_GENERATOR}" ${CMAKE_OPTIONS} -S "${SOURCE_DIR}"
 
 echo ""
 echo "##############################################################################"
 echo "## Building libgit2"
 echo "##############################################################################"
 
-env PATH="$BUILD_PATH" "$CMAKE" --build .
+env PATH="${BUILD_PATH}" "${CMAKE}" --build .
diff --git a/azure-pipelines/docker/bionic b/azure-pipelines/docker/bionic
index 65a14063a..5918584dc 100644
--- a/azure-pipelines/docker/bionic
+++ b/azure-pipelines/docker/bionic
@@ -1,5 +1,4 @@
-ARG BASE
-FROM $BASE AS apt
+FROM ubuntu:bionic AS apt
 RUN apt-get update && \
     DEBIAN_FRONTEND=noninteractive apt-get install -y --no-install-recommends \
         clang \
diff --git a/azure-pipelines/docker/focal b/azure-pipelines/docker/focal
new file mode 100644
index 000000000..c75e85a4c
--- /dev/null
+++ b/azure-pipelines/docker/focal
@@ -0,0 +1,79 @@
+FROM ubuntu:focal AS apt
+RUN apt-get update && \
+    DEBIAN_FRONTEND=noninteractive apt-get install -y --no-install-recommends \
+        bzip2 \
+        clang-10 \
+        cmake \
+        curl \
+        gcc-10 \
+        git \
+        krb5-user \
+        libcurl4-gnutls-dev \
+        libgcrypt20-dev \
+        libkrb5-dev \
+        libpcre3-dev \
+        libssl-dev \
+        libz-dev \
+        llvm-10 \
+        make \
+        ninja-build \
+        openjdk-8-jre-headless \
+        openssh-server \
+        openssl \
+        pkgconf \
+        python \
+        sudo \
+        valgrind \
+        && \
+    rm -rf /var/lib/apt/lists/* && \
+    mkdir /usr/local/msan
+
+FROM apt AS mbedtls
+RUN cd /tmp && \
+    curl --location --silent --show-error https://tls.mbed.org/download/mbedtls-2.16.2-apache.tgz | \
+        tar -xz && \
+    cd mbedtls-2.16.2 && \
+    scripts/config.pl unset MBEDTLS_AESNI_C && \
+    scripts/config.pl set MBEDTLS_MD4_C 1 && \
+    mkdir build build-msan && \
+    cd build && \
+    CC=clang-10 CFLAGS="-fPIC" cmake -G Ninja -DENABLE_PROGRAMS=OFF -DENABLE_TESTING=OFF -DUSE_SHARED_MBEDTLS_LIBRARY=ON -DUSE_STATIC_MBEDTLS_LIBRARY=OFF -DCMAKE_BUILD_TYPE=Debug -DCMAKE_PREFIX_PATH=/usr/local -DCMAKE_INSTALL_PREFIX=/usr/local .. && \
+    ninja install && \
+    cd ../build-msan && \
+    CC=clang-10 CFLAGS="-fPIC" cmake -G Ninja -DENABLE_PROGRAMS=OFF -DENABLE_TESTING=OFF -DUSE_SHARED_MBEDTLS_LIBRARY=ON -DUSE_STATIC_MBEDTLS_LIBRARY=OFF -DCMAKE_BUILD_TYPE=MemSanDbg -DCMAKE_INSTALL_PREFIX=/usr/local/msan .. && \
+    ninja install && \
+    cd .. && \
+    rm -rf mbedtls-2.16.2
+
+FROM mbedtls AS libssh2
+RUN cd /tmp && \
+    curl --insecure --location --silent --show-error https://www.libssh2.org/download/libssh2-1.8.2.tar.gz | \
+        tar -xz && \
+    cd libssh2-1.8.2 && \
+    mkdir build build-msan && \
+    cd build && \
+    CC=clang-10 CFLAGS="-fPIC" cmake -G Ninja -DBUILD_SHARED_LIBS=ON -DCRYPTO_BACKEND=Libgcrypt -DCMAKE_PREFIX_PATH=/usr/local -DCMAKE_INSTALL_PREFIX=/usr/local .. && \
+    ninja install && \
+    cd ../build-msan && \
+    CC=clang-10 CFLAGS="-fPIC -fsanitize=memory -fno-optimize-sibling-calls -fsanitize-memory-track-origins=2 -fno-omit-frame-pointer" LDFLAGS="-fsanitize=memory" cmake -G Ninja -DBUILD_SHARED_LIBS=ON -DCRYPTO_BACKEND=mbedTLS -DCMAKE_PREFIX_PATH=/usr/local/msan -DCMAKE_INSTALL_PREFIX=/usr/local/msan .. && \
+    ninja install && \
+    cd .. && \
+    rm -rf libssh2-1.8.2
+
+FROM libssh2 AS valgrind
+RUN cd /tmp && \
+    curl --insecure --location --silent --show-error https://sourceware.org/pub/valgrind/valgrind-3.15.0.tar.bz2 | \
+        tar -xj && \
+    cd valgrind-3.15.0 && \
+    CC=clang-10 ./configure && \
+    make MAKEFLAGS="-j -l$(grep -c ^processor /proc/cpuinfo)" && \
+    make install && \
+    cd .. && \
+    rm -rf valgrind-3.15.0
+
+FROM valgrind AS configure
+COPY entrypoint.sh /usr/local/bin/entrypoint.sh
+RUN chmod a+x /usr/local/bin/entrypoint.sh
+RUN mkdir /var/run/sshd
+
+ENTRYPOINT ["/usr/local/bin/entrypoint.sh"]
diff --git a/azure-pipelines/docker/xenial b/azure-pipelines/docker/xenial
index bfb96d9db..67867edc6 100644
--- a/azure-pipelines/docker/xenial
+++ b/azure-pipelines/docker/xenial
@@ -1,5 +1,4 @@
-ARG BASE
-FROM $BASE AS apt
+FROM ubuntu:xenial AS apt
 RUN apt-get update && \
     DEBIAN_FRONTEND=noninteractive apt-get install -y --no-install-recommends \
         bzip2 \
diff --git a/azure-pipelines/getcontainer.sh b/azure-pipelines/getcontainer.sh
new file mode 100755
index 000000000..bc93f4919
--- /dev/null
+++ b/azure-pipelines/getcontainer.sh
@@ -0,0 +1,45 @@
+#!/bin/bash
+
+set -e
+
+DOCKERFILE_PATH=$1
+
+if [ "${DOCKERFILE_PATH}" = "" ]; then
+	echo "usage: $0 dockerfile"
+	exit 1
+fi
+
+if [ "${DOCKER_REGISTRY}" = "" ]; then
+	echo "DOCKER_REGISTRY environment variable is unset."
+	echo "Not running inside GitHub Actions or misconfigured?"
+	exit 1
+fi
+
+DOCKER_CONTAINER="${GITHUB_REPOSITORY}/$(basename ${DOCKERFILE_PATH})"
+DOCKER_REGISTRY_CONTAINER="${DOCKER_REGISTRY}/${DOCKER_CONTAINER}"
+
+echo "::set-env name=docker-container::${DOCKER_CONTAINER}"
+echo "::set-env name=docker-registry-container::${DOCKER_REGISTRY_CONTAINER}"
+
+# Identify the last git commit that touched the Dockerfiles
+# Use this as a hash to identify the resulting docker containers
+DOCKER_SHA=$(git log -1 --pretty=format:"%h" -- "${DOCKERFILE_PATH}")
+echo "::set-env name=docker-sha::${DOCKER_SHA}"
+
+DOCKER_REGISTRY_CONTAINER_SHA="${DOCKER_REGISTRY_CONTAINER}:${DOCKER_SHA}"
+
+echo "::set-env name=docker-registry-container-sha::${DOCKER_REGISTRY_CONTAINER_SHA}"
+echo "::set-env name=docker-registry-container-latest::${DOCKER_REGISTRY_CONTAINER}:latest"
+
+exists="true"
+docker login https://${DOCKER_REGISTRY} -u ${GITHUB_ACTOR} -p ${GITHUB_TOKEN} || exists="false"
+
+if [ "${exists}" != "false" ]; then
+	docker pull ${DOCKER_REGISTRY_CONTAINER_SHA} || exists="false"
+fi
+
+if [ "${exists}" = "true" ]; then
+	echo "::set-env name=docker-container-exists::true"
+else
+	echo "::set-env name=docker-container-exists::false"
+fi
diff --git a/azure-pipelines/setup-mingw.sh b/azure-pipelines/setup-mingw.sh
index 1172c2077..d500da058 100755
--- a/azure-pipelines/setup-mingw.sh
+++ b/azure-pipelines/setup-mingw.sh
@@ -4,6 +4,9 @@ echo "##########################################################################
 echo "## Downloading mingw"
 echo "##############################################################################"
 
+BUILD_TEMP=${BUILD_TEMP:=$TEMP}
+BUILD_TEMP=$(cygpath $BUILD_TEMP)
+
 case "$ARCH" in
 	amd64)
 		MINGW_URI="https://bintray.com/libgit2/build-dependencies/download_file?file_path=mingw-w64-x86_64-8.1.0-release-win32-seh-rt_v6-rev0.zip";;
@@ -11,5 +14,12 @@ case "$ARCH" in
 		MINGW_URI="https://bintray.com/libgit2/build-dependencies/download_file?file_path=mingw-w64-i686-8.1.0-release-win32-sjlj-rt_v6-rev0.zip";;
 esac
 
-curl -s -L "$MINGW_URI" -o "$TEMP"/mingw-"$ARCH".zip
-unzip -q "$TEMP"/mingw-"$ARCH".zip -d "$TEMP"
+if [ -z "$MINGW_URI" ]; then
+	echo "No URL"
+	exit 1
+fi
+
+mkdir -p "$BUILD_TEMP"
+
+curl -s -L "$MINGW_URI" -o "$BUILD_TEMP"/mingw-"$ARCH".zip
+unzip -q "$BUILD_TEMP"/mingw-"$ARCH".zip -d "$BUILD_TEMP"
diff --git a/cmake/Modules/AddCFlagIfSupported.cmake b/cmake/AddCFlagIfSupported.cmake
similarity index 100%
rename from cmake/Modules/AddCFlagIfSupported.cmake
rename to cmake/AddCFlagIfSupported.cmake
diff --git a/cmake/Modules/EnableWarnings.cmake b/cmake/EnableWarnings.cmake
similarity index 100%
rename from cmake/Modules/EnableWarnings.cmake
rename to cmake/EnableWarnings.cmake
diff --git a/cmake/Modules/FindCoreFoundation.cmake b/cmake/FindCoreFoundation.cmake
similarity index 100%
rename from cmake/Modules/FindCoreFoundation.cmake
rename to cmake/FindCoreFoundation.cmake
diff --git a/cmake/Modules/FindGSSAPI.cmake b/cmake/FindGSSAPI.cmake
similarity index 100%
rename from cmake/Modules/FindGSSAPI.cmake
rename to cmake/FindGSSAPI.cmake
diff --git a/cmake/Modules/FindGSSFramework.cmake b/cmake/FindGSSFramework.cmake
similarity index 100%
rename from cmake/Modules/FindGSSFramework.cmake
rename to cmake/FindGSSFramework.cmake
diff --git a/cmake/Modules/FindHTTP_Parser.cmake b/cmake/FindHTTP_Parser.cmake
similarity index 100%
rename from cmake/Modules/FindHTTP_Parser.cmake
rename to cmake/FindHTTP_Parser.cmake
diff --git a/cmake/Modules/FindIconv.cmake b/cmake/FindIconv.cmake
similarity index 100%
rename from cmake/Modules/FindIconv.cmake
rename to cmake/FindIconv.cmake
diff --git a/cmake/Modules/FindPCRE.cmake b/cmake/FindPCRE.cmake
similarity index 100%
rename from cmake/Modules/FindPCRE.cmake
rename to cmake/FindPCRE.cmake
diff --git a/cmake/Modules/FindPCRE2.cmake b/cmake/FindPCRE2.cmake
similarity index 100%
rename from cmake/Modules/FindPCRE2.cmake
rename to cmake/FindPCRE2.cmake
diff --git a/cmake/Modules/FindPkgLibraries.cmake b/cmake/FindPkgLibraries.cmake
similarity index 100%
rename from cmake/Modules/FindPkgLibraries.cmake
rename to cmake/FindPkgLibraries.cmake
diff --git a/cmake/Modules/FindSecurity.cmake b/cmake/FindSecurity.cmake
similarity index 100%
rename from cmake/Modules/FindSecurity.cmake
rename to cmake/FindSecurity.cmake
diff --git a/cmake/Modules/FindStatNsec.cmake b/cmake/FindStatNsec.cmake
similarity index 100%
rename from cmake/Modules/FindStatNsec.cmake
rename to cmake/FindStatNsec.cmake
diff --git a/cmake/Modules/FindmbedTLS.cmake b/cmake/FindmbedTLS.cmake
similarity index 100%
rename from cmake/Modules/FindmbedTLS.cmake
rename to cmake/FindmbedTLS.cmake
diff --git a/cmake/Modules/IdeSplitSources.cmake b/cmake/IdeSplitSources.cmake
similarity index 100%
rename from cmake/Modules/IdeSplitSources.cmake
rename to cmake/IdeSplitSources.cmake
diff --git a/cmake/Modules/CheckPrototypeDefinition.c.in b/cmake/Modules/CheckPrototypeDefinition.c.in
deleted file mode 100644
index a97344ac3..000000000
--- a/cmake/Modules/CheckPrototypeDefinition.c.in
+++ /dev/null
@@ -1,29 +0,0 @@
-@CHECK_PROTOTYPE_DEFINITION_HEADER@
-
-static void cmakeRequireSymbol(int dummy, ...) {
-  (void) dummy;
-}
-
-static void checkSymbol(void) {
-#ifndef @CHECK_PROTOTYPE_DEFINITION_SYMBOL@
-  cmakeRequireSymbol(0, &@CHECK_PROTOTYPE_DEFINITION_SYMBOL@);
-#endif
-}
-
-@CHECK_PROTOTYPE_DEFINITION_PROTO@ {
-  return @CHECK_PROTOTYPE_DEFINITION_RETURN@;
-}
-
-#ifdef __CLASSIC_C__
-int main() {
-  int ac;
-  char*av[];
-#else
-int main(int ac, char *av[]) {
-#endif
-  checkSymbol();
-  if (ac > 1000) {
-    return *av[0];
-  }
-  return 0;
-}
diff --git a/cmake/Modules/CheckPrototypeDefinition.cmake b/cmake/Modules/CheckPrototypeDefinition.cmake
deleted file mode 100644
index 244b9b53b..000000000
--- a/cmake/Modules/CheckPrototypeDefinition.cmake
+++ /dev/null
@@ -1,96 +0,0 @@
-# - Check if the protoype we expect is correct.
-# check_prototype_definition(FUNCTION PROTOTYPE RETURN HEADER VARIABLE)
-#  FUNCTION - The name of the function (used to check if prototype exists)
-#  PROTOTYPE- The prototype to check.
-#  RETURN - The return value of the function.
-#  HEADER - The header files required.
-#  VARIABLE - The variable to store the result.
-# Example:
-#  check_prototype_definition(getpwent_r
-#   "struct passwd *getpwent_r(struct passwd *src, char *buf, int buflen)"
-#   "NULL"
-#   "unistd.h;pwd.h"
-#   SOLARIS_GETPWENT_R)
-# The following variables may be set before calling this macro to
-# modify the way the check is run:
-#
-#  CMAKE_REQUIRED_FLAGS = string of compile command line flags
-#  CMAKE_REQUIRED_DEFINITIONS = list of macros to define (-DFOO=bar)
-#  CMAKE_REQUIRED_INCLUDES = list of include directories
-#  CMAKE_REQUIRED_LIBRARIES = list of libraries to link
-
-#=============================================================================
-# Copyright 2005-2009 Kitware, Inc.
-# Copyright 2010-2011 Andreas Schneider <asn@cryptomilk.org>
-#
-# Distributed under the OSI-approved BSD License (the "License");
-# see accompanying file Copyright.txt for details.
-#
-# This software is distributed WITHOUT ANY WARRANTY; without even the
-# implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
-# See the License for more information.
-#=============================================================================
-# (To distribute this file outside of CMake, substitute the full
-#  License text for the above reference.)
-#
-
-get_filename_component(__check_proto_def_dir "${CMAKE_CURRENT_LIST_FILE}" PATH)
-
-function(CHECK_PROTOTYPE_DEFINITION _FUNCTION _PROTOTYPE _RETURN _HEADER _VARIABLE)
-
-  if ("${_VARIABLE}" MATCHES "^${_VARIABLE}$")
-    set(CHECK_PROTOTYPE_DEFINITION_CONTENT "/* */\n")
-
-    set(CHECK_PROTOTYPE_DEFINITION_FLAGS ${CMAKE_REQUIRED_FLAGS})
-    if (CMAKE_REQUIRED_LIBRARIES)
-      set(CHECK_PROTOTYPE_DEFINITION_LIBS
-        "-DLINK_LIBRARIES:STRING=${CMAKE_REQUIRED_LIBRARIES}")
-    else(CMAKE_REQUIRED_LIBRARIES)
-      set(CHECK_PROTOTYPE_DEFINITION_LIBS)
-    endif(CMAKE_REQUIRED_LIBRARIES)
-    if (CMAKE_REQUIRED_INCLUDES)
-      set(CMAKE_SYMBOL_EXISTS_INCLUDES
-        "-DINCLUDE_DIRECTORIES:STRING=${CMAKE_REQUIRED_INCLUDES}")
-    else(CMAKE_REQUIRED_INCLUDES)
-      set(CMAKE_SYMBOL_EXISTS_INCLUDES)
-    endif(CMAKE_REQUIRED_INCLUDES)
-
-    foreach(_FILE ${_HEADER})
-      set(CHECK_PROTOTYPE_DEFINITION_HEADER
-        "${CHECK_PROTOTYPE_DEFINITION_HEADER}#include <${_FILE}>\n")
-    endforeach(_FILE)
-
-    set(CHECK_PROTOTYPE_DEFINITION_SYMBOL ${_FUNCTION})
-    set(CHECK_PROTOTYPE_DEFINITION_PROTO ${_PROTOTYPE})
-    set(CHECK_PROTOTYPE_DEFINITION_RETURN ${_RETURN})
-
-    configure_file("${__check_proto_def_dir}/CheckPrototypeDefinition.c.in"
-      "${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeTmp/CheckPrototypeDefinition.c" @ONLY)
-
-    file(READ ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeTmp/CheckPrototypeDefinition.c _SOURCE)
-
-    try_compile(${_VARIABLE}
-      ${CMAKE_BINARY_DIR}
-      ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeTmp/CheckPrototypeDefinition.c
-      COMPILE_DEFINITIONS ${CMAKE_REQUIRED_DEFINITIONS}
-      CMAKE_FLAGS -DCOMPILE_DEFINITIONS:STRING=${CHECK_PROTOTYPE_DEFINITION_FLAGS}
-      "${CHECK_PROTOTYPE_DEFINITION_LIBS}"
-      "${CMAKE_SYMBOL_EXISTS_INCLUDES}"
-      OUTPUT_VARIABLE OUTPUT)
-
-    if (${_VARIABLE})
-      set(${_VARIABLE} 1 CACHE INTERNAL "Have correct prototype for ${_FUNCTION}")
-      message(STATUS "Checking prototype ${_FUNCTION} for ${_VARIABLE} - True")
-      file(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeOutput.log
-        "Determining if the prototype ${_FUNCTION} exists for ${_VARIABLE} passed with the following output:\n"
-        "${OUTPUT}\n\n")
-    else (${_VARIABLE})
-      message(STATUS "Checking prototype ${_FUNCTION} for ${_VARIABLE} - False")
-      set(${_VARIABLE} 0 CACHE INTERNAL "Have correct prototype for ${_FUNCTION}")
-      file(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeError.log
-        "Determining if the prototype ${_FUNCTION} exists for ${_VARIABLE} failed with the following output:\n"
-        "${OUTPUT}\n\n${_SOURCE}\n\n")
-    endif (${_VARIABLE})
-  endif("${_VARIABLE}" MATCHES "^${_VARIABLE}$")
-
-endfunction(CHECK_PROTOTYPE_DEFINITION)
diff --git a/cmake/Modules/PkgBuildConfig.cmake b/cmake/PkgBuildConfig.cmake
similarity index 100%
rename from cmake/Modules/PkgBuildConfig.cmake
rename to cmake/PkgBuildConfig.cmake
diff --git a/cmake/Modules/SanitizeBool.cmake b/cmake/SanitizeBool.cmake
similarity index 100%
rename from cmake/Modules/SanitizeBool.cmake
rename to cmake/SanitizeBool.cmake
diff --git a/cmake/Modules/SelectGSSAPI.cmake b/cmake/SelectGSSAPI.cmake
similarity index 55%
rename from cmake/Modules/SelectGSSAPI.cmake
rename to cmake/SelectGSSAPI.cmake
index 9b2bb1fc5..0a42eeefd 100644
--- a/cmake/Modules/SelectGSSAPI.cmake
+++ b/cmake/SelectGSSAPI.cmake
@@ -1,35 +1,27 @@
-# Select the backend to use
-
-# We try to find any packages our backends might use
-
 INCLUDE(SanitizeBool)
 
+# We try to find any packages our backends might use
 FIND_PACKAGE(GSSAPI)
 IF (CMAKE_SYSTEM_NAME MATCHES "Darwin")
 	INCLUDE(FindGSSFramework)
 ENDIF()
 
-# Auto-select GSS backend
-SanitizeBool(USE_GSSAPI)
-IF (USE_GSSAPI STREQUAL ON)
-	IF (GSSFRAMEWORK_FOUND)
-		SET(GSS_BACKEND "GSS.framework")
-	ELSEIF(GSSAPI_FOUND)
-		SET(GSS_BACKEND "gssapi")
-	ELSE()
-		MESSAGE(FATAL_ERROR "Unable to autodetect a usable GSS backend."
-			"Please pass the backend name explicitly (-DUSE_GSS=backend)")
+IF(USE_GSSAPI)
+	# Auto-select GSS backend
+	SanitizeBool(USE_GSSAPI)
+	IF (USE_GSSAPI STREQUAL ON)
+		IF (GSSFRAMEWORK_FOUND)
+			SET(USE_GSSAPI "GSS.framework")
+		ELSEIF(GSSAPI_FOUND)
+			SET(USE_GSSAPI "gssapi")
+		ELSE()
+			MESSAGE(FATAL_ERROR "Unable to autodetect a usable GSS backend."
+				"Please pass the backend name explicitly (-DUSE_GSS=backend)")
+		ENDIF()
 	ENDIF()
-ELSEIF(USE_GSSAPI)
-	# Backend was explicitly set
-	SET(GSS_BACKEND ${USE_GSSAPI})
-ELSE()
-	SET(GSS_BACKEND NO)
-ENDIF()
 
-IF(GSS_BACKEND)
 	# Check that we can find what's required for the selected backend
-	IF (GSS_BACKEND STREQUAL "GSS.framework")
+	IF (USE_GSSAPI STREQUAL "GSS.framework")
 		IF (NOT GSSFRAMEWORK_FOUND)
 			MESSAGE(FATAL_ERROR "Asked for GSS.framework backend, but it wasn't found")
 		ENDIF()
@@ -37,8 +29,8 @@ IF(GSS_BACKEND)
 		LIST(APPEND LIBGIT2_LIBS ${GSSFRAMEWORK_LIBRARIES})
 
 		SET(GIT_GSSFRAMEWORK 1)
-		ADD_FEATURE_INFO(SPNEGO GIT_GSSFRAMEWORK "SPNEGO authentication support (${GSS_BACKEND})")
-	ELSEIF (GSS_BACKEND STREQUAL "gssapi")
+		ADD_FEATURE_INFO(SPNEGO GIT_GSSFRAMEWORK "SPNEGO authentication support (${USE_GSSAPI})")
+	ELSEIF (USE_GSSAPI STREQUAL "gssapi")
 		IF (NOT GSSAPI_FOUND)
 			MESSAGE(FATAL_ERROR "Asked for gssapi GSS backend, but it wasn't found")
 		ENDIF()
@@ -46,9 +38,9 @@ IF(GSS_BACKEND)
 		LIST(APPEND LIBGIT2_LIBS ${GSSAPI_LIBRARIES})
 
 		SET(GIT_GSSAPI 1)
-		ADD_FEATURE_INFO(SPNEGO GIT_GSSAPI "SPNEGO authentication support (${GSS_BACKEND})")
+		ADD_FEATURE_INFO(SPNEGO GIT_GSSAPI "SPNEGO authentication support (${USE_GSSAPI})")
 	ELSE()
-		MESSAGE(FATAL_ERROR "Asked for backend ${GSS_BACKEND} but it wasn't found")
+		MESSAGE(FATAL_ERROR "Asked for backend ${USE_GSSAPI} but it wasn't found")
 	ENDIF()
 ELSE()
 	SET(GIT_GSSAPI 0)
diff --git a/cmake/Modules/SelectHTTPSBackend.cmake b/cmake/SelectHTTPSBackend.cmake
similarity index 75%
rename from cmake/Modules/SelectHTTPSBackend.cmake
rename to cmake/SelectHTTPSBackend.cmake
index f9b0b1cdc..afbeac424 100644
--- a/cmake/Modules/SelectHTTPSBackend.cmake
+++ b/cmake/SelectHTTPSBackend.cmake
@@ -1,5 +1,3 @@
-# Select the backend to use
-
 INCLUDE(SanitizeBool)
 
 # We try to find any packages our backends might use
@@ -10,36 +8,31 @@ IF (CMAKE_SYSTEM_NAME MATCHES "Darwin")
 	FIND_PACKAGE(CoreFoundation)
 ENDIF()
 
-# Auto-select TLS backend
-SanitizeBool(USE_HTTPS)
-IF (USE_HTTPS STREQUAL ON)
-	IF (SECURITY_FOUND)
-		IF (SECURITY_HAS_SSLCREATECONTEXT)
-			SET(HTTPS_BACKEND "SecureTransport")
+IF(USE_HTTPS)
+	# Auto-select TLS backend
+	SanitizeBool(USE_HTTPS)
+	IF (USE_HTTPS STREQUAL ON)
+		IF (SECURITY_FOUND)
+			IF (SECURITY_HAS_SSLCREATECONTEXT)
+				SET(USE_HTTPS "SecureTransport")
+			ELSE()
+				MESSAGE(STATUS "Security framework is too old, falling back to OpenSSL")
+				SET(USE_HTTPS "OpenSSL")
+			ENDIF()
+		ELSEIF (WINHTTP)
+			SET(USE_HTTPS "WinHTTP")
+		ELSEIF(OPENSSL_FOUND)
+			SET(USE_HTTPS "OpenSSL")
+		ELSEIF(MBEDTLS_FOUND)
+			SET(USE_HTTPS "mbedTLS")
 		ELSE()
-			MESSAGE(STATUS "Security framework is too old, falling back to OpenSSL")
-			SET(HTTPS_BACKEND "OpenSSL")
+			MESSAGE(FATAL_ERROR "Unable to autodetect a usable HTTPS backend."
+				"Please pass the backend name explicitly (-DUSE_HTTPS=backend)")
 		ENDIF()
-	ELSEIF (WINHTTP)
-		SET(HTTPS_BACKEND "WinHTTP")
-	ELSEIF(OPENSSL_FOUND)
-		SET(HTTPS_BACKEND "OpenSSL")
-	ELSEIF(MBEDTLS_FOUND)
-		SET(HTTPS_BACKEND "mbedTLS")
-	ELSE()
-		MESSAGE(FATAL_ERROR "Unable to autodetect a usable HTTPS backend."
-			"Please pass the backend name explicitly (-DUSE_HTTPS=backend)")
 	ENDIF()
-ELSEIF(USE_HTTPS)
-	# HTTPS backend was explicitly set
-	SET(HTTPS_BACKEND ${USE_HTTPS})
-ELSE()
-	SET(HTTPS_BACKEND NO)
-ENDIF()
 
-IF(HTTPS_BACKEND)
 	# Check that we can find what's required for the selected backend
-	IF (HTTPS_BACKEND STREQUAL "SecureTransport")
+	IF (USE_HTTPS STREQUAL "SecureTransport")
 		IF (NOT COREFOUNDATION_FOUND)
 			MESSAGE(FATAL_ERROR "Cannot use SecureTransport backend, CoreFoundation.framework not found")
 		ENDIF()
@@ -54,7 +47,7 @@ IF(HTTPS_BACKEND)
 		LIST(APPEND LIBGIT2_SYSTEM_INCLUDES ${SECURITY_INCLUDE_DIR})
 		LIST(APPEND LIBGIT2_LIBS ${COREFOUNDATION_LDFLAGS} ${SECURITY_LDFLAGS})
 		LIST(APPEND LIBGIT2_PC_LIBS ${COREFOUNDATION_LDFLAGS} ${SECURITY_LDFLAGS})
-	ELSEIF (HTTPS_BACKEND STREQUAL "OpenSSL")
+	ELSEIF (USE_HTTPS STREQUAL "OpenSSL")
 		IF (NOT OPENSSL_FOUND)
 			MESSAGE(FATAL_ERROR "Asked for OpenSSL TLS backend, but it wasn't found")
 		ENDIF()
@@ -64,7 +57,7 @@ IF(HTTPS_BACKEND)
 		LIST(APPEND LIBGIT2_LIBS ${OPENSSL_LIBRARIES})
 		LIST(APPEND LIBGIT2_PC_LIBS ${OPENSSL_LDFLAGS})
 		LIST(APPEND LIBGIT2_PC_REQUIRES "openssl")
-	ELSEIF(HTTPS_BACKEND STREQUAL "mbedTLS")
+	ELSEIF(USE_HTTPS STREQUAL "mbedTLS")
 		IF (NOT MBEDTLS_FOUND)
 			MESSAGE(FATAL_ERROR "Asked for mbedTLS backend, but it wasn't found")
 		ENDIF()
@@ -113,14 +106,14 @@ IF(HTTPS_BACKEND)
 		# https://github.com/ARMmbed/mbedtls/issues/228
 		# For now, pass its link flags as our own
 		LIST(APPEND LIBGIT2_PC_LIBS ${MBEDTLS_LIBRARIES})
-	ELSEIF (HTTPS_BACKEND STREQUAL "WinHTTP")
+	ELSEIF (USE_HTTPS STREQUAL "WinHTTP")
 		# WinHTTP setup was handled in the WinHTTP-specific block above
 	ELSE()
-		MESSAGE(FATAL_ERROR "Asked for backend ${HTTPS_BACKEND} but it wasn't found")
+		MESSAGE(FATAL_ERROR "Asked for backend ${USE_HTTPS} but it wasn't found")
 	ENDIF()
 
 	SET(GIT_HTTPS 1)
-	ADD_FEATURE_INFO(HTTPS GIT_HTTPS "using ${HTTPS_BACKEND}")
+	ADD_FEATURE_INFO(HTTPS GIT_HTTPS "using ${USE_HTTPS}")
 ELSE()
 	SET(GIT_HTTPS 0)
 	ADD_FEATURE_INFO(HTTPS NO "")
diff --git a/cmake/Modules/SelectHashes.cmake b/cmake/SelectHashes.cmake
similarity index 54%
rename from cmake/Modules/SelectHashes.cmake
rename to cmake/SelectHashes.cmake
index a1339c173..06672ab03 100644
--- a/cmake/Modules/SelectHashes.cmake
+++ b/cmake/SelectHashes.cmake
@@ -5,37 +5,28 @@ INCLUDE(SanitizeBool)
 # USE_SHA1=CollisionDetection(ON)/HTTPS/Generic/OFF
 
 SanitizeBool(USE_SHA1)
-IF(USE_SHA1 STREQUAL ON OR USE_SHA1 STREQUAL "CollisionDetection")
-	SET(SHA1_BACKEND "CollisionDetection")
+IF(USE_SHA1 STREQUAL ON)
+	SET(USE_SHA1 "CollisionDetection")
 ELSEIF(USE_SHA1 STREQUAL "HTTPS")
-	message(STATUS "Checking HTTPS backend… ${HTTPS_BACKEND}")
-	IF(HTTPS_BACKEND STREQUAL "SecureTransport")
-		SET(SHA1_BACKEND "CommonCrypto")
-	ELSEIF(HTTPS_BACKEND STREQUAL "WinHTTP")
-		SET(SHA1_BACKEND "Win32")
-	ELSEIF(HTTPS_BACKEND)
-		SET(SHA1_BACKEND ${HTTPS_BACKEND})
+	IF(USE_HTTPS STREQUAL "SecureTransport")
+		SET(USE_SHA1 "CommonCrypto")
+	ELSEIF(USE_HTTPS STREQUAL "WinHTTP")
+		SET(USE_SHA1 "Win32")
+	ELSEIF(USE_HTTPS)
+		SET(USE_SHA1 ${USE_HTTPS})
 	ELSE()
+		SET(USE_SHA1 "CollisionDetection")
 	ENDIF()
-	IF(NOT HTTPS_BACKEND)
-		SET(SHA1_BACKEND "CollisionDetection")
-	ENDIF()
-	message(STATUS "Using SHA1 backend ${SHA1_BACKEND}")
-ELSEIF(USE_SHA1 STREQUAL "Generic")
-	SET(SHA1_BACKEND "Generic")
-# ELSEIF(NOT USE_SHA1)
-ELSE()
-	MESSAGE(FATAL_ERROR "Invalid value for USE_SHA1: ${USE_SHA1}")
 ENDIF()
 
-IF(SHA1_BACKEND STREQUAL "CollisionDetection")
+IF(USE_SHA1 STREQUAL "CollisionDetection")
 	SET(GIT_SHA1_COLLISIONDETECT 1)
 	ADD_DEFINITIONS(-DSHA1DC_NO_STANDARD_INCLUDES=1)
 	ADD_DEFINITIONS(-DSHA1DC_CUSTOM_INCLUDE_SHA1_C=\"common.h\")
 	ADD_DEFINITIONS(-DSHA1DC_CUSTOM_INCLUDE_UBC_CHECK_C=\"common.h\")
 	FILE(GLOB SRC_SHA1 hash/sha1/collisiondetect.* hash/sha1/sha1dc/*)
-ELSEIF(SHA1_BACKEND STREQUAL "OpenSSL")
-	# OPENSSL_FOUND should already be set, we're checking HTTPS_BACKEND
+ELSEIF(USE_SHA1 STREQUAL "OpenSSL")
+	# OPENSSL_FOUND should already be set, we're checking USE_HTTPS
 
 	SET(GIT_SHA1_OPENSSL 1)
 	IF(CMAKE_SYSTEM_NAME MATCHES "FreeBSD")
@@ -44,10 +35,10 @@ ELSEIF(SHA1_BACKEND STREQUAL "OpenSSL")
 		LIST(APPEND LIBGIT2_PC_REQUIRES "openssl")
 	ENDIF()
 	FILE(GLOB SRC_SHA1 hash/sha1/openssl.*)
-ELSEIF(SHA1_BACKEND STREQUAL "CommonCrypto")
+ELSEIF(USE_SHA1 STREQUAL "CommonCrypto")
 	SET(GIT_SHA1_COMMON_CRYPTO 1)
 	FILE(GLOB SRC_SHA1 hash/sha1/common_crypto.*)
-ELSEIF(SHA1_BACKEND STREQUAL "mbedTLS")
+ELSEIF(USE_SHA1 STREQUAL "mbedTLS")
 	SET(GIT_SHA1_MBEDTLS 1)
 	FILE(GLOB SRC_SHA1 hash/sha1/mbedtls.*)
 	LIST(APPEND LIBGIT2_SYSTEM_INCLUDES ${MBEDTLS_INCLUDE_DIR})
@@ -56,14 +47,15 @@ ELSEIF(SHA1_BACKEND STREQUAL "mbedTLS")
 	# https://github.com/ARMmbed/mbedtls/issues/228
 	# For now, pass its link flags as our own
 	LIST(APPEND LIBGIT2_PC_LIBS ${MBEDTLS_LIBRARIES})
-ELSEIF(SHA1_BACKEND STREQUAL "Win32")
+ELSEIF(USE_SHA1 STREQUAL "Win32")
 	SET(GIT_SHA1_WIN32 1)
 	FILE(GLOB SRC_SHA1 hash/sha1/win32.*)
-ELSEIF(SHA1_BACKEND STREQUAL "Generic")
+ELSEIF(USE_SHA1 STREQUAL "Generic")
 	FILE(GLOB SRC_SHA1 hash/sha1/generic.*)
-# ELSEIF(NOT USE_SHA1)
 ELSE()
-	MESSAGE(FATAL_ERROR "Asked for unknown SHA1 backend: ${SHA1_BACKEND}")
+	MESSAGE(FATAL_ERROR "Asked for unknown SHA1 backend: ${USE_SHA1}")
 ENDIF()
 
-ADD_FEATURE_INFO(SHA ON "using ${SHA1_BACKEND}")
+list(SORT SRC_SHA1)
+
+ADD_FEATURE_INFO(SHA ON "using ${USE_SHA1}")
diff --git a/docs/changelog.md b/docs/changelog.md
index c2423c338..288ef2d11 100644
--- a/docs/changelog.md
+++ b/docs/changelog.md
@@ -1,3 +1,62 @@
+v1.1
+----
+
+This is release v1.1, "Fernweh".
+
+### Changes or improvements
+
+* Our bundled PCRE dependency has been updated to 8.44.
+
+* The `refs/remotes/origin/HEAD` file will be created at clone time to
+  point to the origin's default branch.
+
+* libgit2 now uses the `__atomic_` intrinsics instead of `__sync_`
+  intrinsics on supported gcc and clang versions.
+
+* The `init.defaultBranch` setting is now respected and `master` is
+  no longer the hardcoded as the default branch name.
+
+* Patch files that do not contain an `index` line can now be parsed.
+
+* Configuration files with multi-line values can now contain quotes
+  split across multiple lines.
+
+* Windows clients now attempt to use TLS1.3 when available.
+
+* Servers that request an upgrade to a newer HTTP version are
+  silently ignored instead of erroneously failing.
+
+* Users can pass `NULL` to the options argument to
+  `git_describe_commit`.
+
+* Clones and fetches of very large packfiles now succeeds on 32-bit
+  platforms.
+
+* Custom reference database backends can now handle the repository's
+  `HEAD` correctly.
+
+* Repositories with a large number of packfiles no longer exhaust the
+  number of file descriptors.
+
+* The test framework now supports TAP output when the `-t` flag is
+  specified.
+
+* The test framework can now specify an exact match to a test
+  function using a trailing `$`.
+
+* All checkout types support `GIT_CHECKOUT_DISABLE_PATHSPEC_MATCH`.
+
+* `git_blame` now can ignore whitespace changes using the option
+  `GIT_BLAME_IGNORE_WHITESPACE`.
+
+* Several new examples have been created, including an examples for
+  commit, add and push.
+
+* Mode changes during rename are now supported in patch application.
+
+* `git_checkout_head` now correctly removes untracked files in a
+  subdirectory when the `FORCE | REMOVE_UNTRACKED` options are specified.
+
 v1.0.1
 ------
 
diff --git a/docs/coding-style.md b/docs/coding-style.md
new file mode 100644
index 000000000..d5188f0bc
--- /dev/null
+++ b/docs/coding-style.md
@@ -0,0 +1,364 @@
+# libgit2 Coding Style
+
+This documentation describes the preferred coding style for the libgit2 project.
+While not all parts of our code base conform to this coding style, the outlined
+rules are what we aim for.
+
+Note that in no case do we accept changes that convert huge parts of the code
+base to use our coding style. Instead, it is encouraged to modernize small parts
+of code you're going to modify anyway for a given change you want to introduce.
+A good rule to follow is the Boy Scout Rule: "Leave the campground cleaner than
+you found it."
+
+## C Coding Style
+
+The following sections define the coding style for all code files and headers.
+
+### Indentation and Alignment
+
+Code is indented by tabs, where a tab is 8 spaces. Each opening scope increases
+the indentation level.
+
+```c
+int foobar(int void)
+{
+	if (condition)
+		doit();
+	/* Body */
+}
+```
+
+Switch statements have their `case`s aligned with the `switch` keyword. Case
+bodies are indented by an additional level. Case bodies should not open their
+own scope to declare variables.
+
+```c
+switch (c) {
+case 'a':
+case 'b':
+	return 0;
+default:
+	return -1;
+}
+```
+
+Multi-line conditions should be aligned with the opening brace of the current
+statement:
+
+```c
+if (one_very_long_condition(c) &&
+    another_very_long_condition(c))
+	doit();
+```
+
+### Spaces
+
+There must be no space between the function and its arguments, arguments must be
+separated by a space:
+
+```c
+int doit(int first_arg, int second_arg);
+doit(1, 2);
+```
+
+For any binary or ternary operators, the arguments and separator must be
+separated by a space:
+
+```c
+1 + 2;
+x ? x : NULL;
+```
+
+Unary operators do not have a space between them and the argument they refer to:
+
+```c
+*c
+&c
+```
+
+The `sizeof` operator always must not have a space and must use braces around
+the type:
+
+```
+sizeof(int)
+```
+
+There must be a space after the keywords `if`, `switch`, `case`, `do` and
+`while`.
+
+### Braces
+
+Functions must have their opening brace on the following line:
+
+```c
+void foobar(void)
+{
+	doit();
+}
+```
+
+For conditions, braces should be placed on the same line as the condition:
+
+```c
+if (condition(c)) {
+	doit();
+	dothat();
+}
+
+while (true) {
+	doit();
+}
+```
+
+In case a condition's body has a single line, only, it's allowed to omit braces,
+except if any of its `else if` or `else` branches has more than one line:
+
+```c
+if (condition(c))
+	doit();
+
+if (condition(c))
+	doit();
+else if (other_condition(c))
+	doit();
+
+/* This example must use braces as the `else if` requires them. */
+if (condition(c)) {
+	doit();
+} else if (other_condition(c)) {
+	doit();
+	dothat();
+} else {
+	abort();
+}
+```
+
+### Comments
+
+Comments must use C-style `/* */` comments. C++-style `// `comments are not
+allowed in our codebase. This is a strict requirement as libgit2 tries to be
+compliant with the ISO C90 standard, which only allows C-style comments.
+
+Single-line comments may have their opening and closing tag on the same line:
+
+```c
+/* This is a short comment. */
+```
+
+For multi-line comments, the opening and closing tag should be empty:
+
+```c
+/*
+ * This is a rather long and potentially really unwiedly but informative
+ * multiline comment that helps quite a lot.
+ */
+```
+
+Public functions must have documentation that explain their usage, internal
+functions should have a comment. We use Docurium to generate documentation
+derived from these comments, which uses syntax similar to Doxygen. The first
+line should be a short summary of what the function does. More in-depth
+explanation should be separated from that first line by an empty line.
+Parameters and return values should be documented via `@return` and `@param`
+tags:
+
+```c
+/*
+ * Froznicate the string.
+ *
+ * Froznicate the string by foobaring its internal structure into a more obvious
+ * translation. Note that the returned string is a newly allocated string that
+ * shall be `free`d by the caller.
+ *
+ * @param s String to froznicate
+ * @return A newly allocated string or `NULL` in case an error occurred.
+ * /
+char *froznicate(const char *s);
+```
+
+### Variables
+
+Variables must be declared at the beginning of their scope. This is a strict
+requirement as libgit2 tries to be compliant with the ISO C90 standard, which
+forbids mixed declarations and code:
+
+```c
+void foobar(void)
+{
+	char *c = NULL;
+	int a, b;
+
+	a = 0;
+	b = 1;
+
+	return c;
+}
+```
+
+### Naming
+
+Variables must have all-lowercase names. In case a variable name has multiple
+words, words should be separated by an underscore `_` character. While
+recommended to use descriptive naming, common variable names like `i` for
+indices are allowed.
+
+All public functions must have a `git` prefix as well as a prefix indicating
+their respective subsystem. E.g. a function that opens a repository should be
+called `git_repository_open()`. Functions that are not public but declared in
+an internal header file for use by other subsystems should follow the same
+naming pattern. File-local static functions must not have a `git` prefix, but
+should have a prefix indicating their respective subsystem.
+
+All structures declared in the libgit2 project must have a `typedef`, we do not
+use `struct type` variables. Type names follow the same schema as functions.
+
+### Error Handling
+
+The libgit2 project mostly uses error codes to indicate errors. Error codes are
+always of type `int`, where `0` indicates success and a negative error code
+indicates an error case. In some cases, positive error codes may be used to
+indicate special cases. Returned values that are not an error code should be
+returned via an out parameter. Out parameters must always come first in the list
+of arguments.
+
+```c
+int doit(const char **out, int arg)
+{
+	if (!arg)
+		return -1;
+	*out = "Got an argument";
+	return 0;
+}
+```
+
+To avoid repetitive and fragile error handling in case a function has resources
+that need to be free'd, we use `goto out`s:
+
+```c
+int doit(char **out, int arg)
+{
+	int error = 0;
+	char *c;
+
+	c = malloc(strlen("Got an argument") + 1);
+	if (!c) {
+		error = -1;
+		goto out;
+	}
+
+	if (!arg) {
+		error = -1;
+		goto out;
+	}
+
+	strcpy(c, "Got an argument")
+	*out = c;
+
+out:
+	if (error)
+		free(c);
+	return error;
+}
+```
+
+When calling functions that return an error code, you should assign the error
+code to an `error` variable and, in case an error case is indicated and no
+custom error handling is required, return that error code:
+
+```c
+int foobar(void)
+{
+	int error;
+
+	if ((error = doit()) < 0)
+		return error;
+
+	return 0;
+}
+```
+
+When doing multiple function calls where all of the functions return an error
+code, it's common practice to chain these calls together:
+
+```c
+int doit(void)
+{
+	int error;
+
+	if ((error = dothis()) < 0 ||
+	    (error = dothat()) < 0)
+		return error;
+
+	return 0;
+}
+```
+
+## CMake Coding Style
+
+The following section defines the coding style for our CMake build system.
+
+### Indentation
+
+Code is indented by tabs, where a tab is 8 spaces. Each opening scope increases
+the indentation level.
+
+```cmake
+if(CONDITION)
+	doit()
+endif()
+```
+
+### Spaces
+
+There must be no space between keywords and their opening brace. While this is
+the same as in our C codebase for function calls, this also applies to
+conditional keywords. This is done to avoid the awkward-looking `else ()`
+statement.
+
+```cmake
+if(CONDITION)
+	doit()
+else()
+	dothat()
+endif()
+```
+
+### Case
+
+While CMake is completely case-insensitive when it comes to function calls, we
+want to agree on a common coding style for this. To reduce the danger of
+repetitive strain injuries, all function calls should be lower-case (NB: this is
+not currently the case yet, but introduced as a new coding style by this
+document).
+
+Variables are written all-uppercase. In contrast to functions, variables are
+case-sensitive in CMake. As CMake itself uses upper-case variables in all
+places, we should follow suit and do the same.
+
+Control flow keywords must be all lowercase. In contrast to that, test keywords
+must be all uppercase:
+
+```cmake
+if(NOT CONDITION)
+        doit()
+elseif(FOO AND BAR)
+        dothat()
+endif()
+```
+
+### Targets
+
+CMake code should not use functions that modify the global scope but prefer
+their targeted equivalents, instead. E.g. instead of using
+`include_directories()`, you must use `target_include_directories()`. An
+exception to this rule is setting up global compiler flags like warnings or
+flags required to set up the build type.
+
+### Dependencies
+
+Dependencies should not be discovered or set up in the main "CMakeLists.txt"
+module. Instead, they should either have their own module in our top-level
+"cmake/" directory or have a "CMakeLists.txt" in their respective "deps/"
+directory in case it is a vendored library. All dependencies should expose
+interface library targets that can be linked against with
+`target_link_libraries()`.
diff --git a/examples/add.c b/examples/add.c
index 6e3c239fc..542360ea9 100644
--- a/examples/add.c
+++ b/examples/add.c
@@ -48,9 +48,11 @@ int lg2_add(git_repository *repo, int argc, char **argv)
 	git_index_matched_path_cb matched_cb = NULL;
 	git_index *index;
 	git_strarray array = {0};
-	struct index_options options;
+	struct index_options options = {0};
 	struct args_info args = ARGS_INFO_INIT;
 
+	options.mode = INDEX_ADD;
+
 	/* Parse the options & arguments. */
 	parse_opts(NULL, &options, &args);
 	strarray_from_args(&array, &args);
diff --git a/examples/checkout.c b/examples/checkout.c
index 897c42f3f..204b58d88 100644
--- a/examples/checkout.c
+++ b/examples/checkout.c
@@ -239,7 +239,7 @@ next:
 
 out:
 	git_reference_free(remote_ref);
-	git_strarray_free(&remotes);
+	git_strarray_dispose(&remotes);
 	return error;
 }
 
diff --git a/examples/commit.c b/examples/commit.c
new file mode 100644
index 000000000..cd9782de1
--- /dev/null
+++ b/examples/commit.c
@@ -0,0 +1,84 @@
+/*
+ * libgit2 "commit" example - shows how to create a git commit
+ *
+ * Written by the libgit2 contributors
+ *
+ * To the extent possible under law, the author(s) have dedicated all copyright
+ * and related and neighboring rights to this software to the public domain
+ * worldwide. This software is distributed without any warranty.
+ *
+ * You should have received a copy of the CC0 Public Domain Dedication along
+ * with this software. If not, see
+ * <http://creativecommons.org/publicdomain/zero/1.0/>.
+ */
+
+#include "common.h"
+
+/**
+ * This example demonstrates the libgit2 commit APIs to roughly
+ * simulate `git commit` with the commit message argument.
+ *
+ * This does not have:
+ *
+ * - Robust error handling
+ * - Most of the `git commit` options
+ *
+ * This does have:
+ *
+ * - Example of performing a git commit with a comment
+ * 
+ */
+int lg2_commit(git_repository *repo, int argc, char **argv)
+{
+	const char *opt = argv[1];
+	const char *comment = argv[2];
+	int error;
+
+	git_oid commit_oid,tree_oid;
+	git_tree *tree;
+	git_index *index;	
+	git_object *parent = NULL;
+	git_reference *ref = NULL;
+	git_signature *signature;	
+
+	/* Validate args */
+	if (argc < 3 || strcmp(opt, "-m") != 0) {
+		printf ("USAGE: %s -m <comment>\n", argv[0]);
+		return -1;
+	}
+
+	error = git_revparse_ext(&parent, &ref, repo, "HEAD");
+	if (error == GIT_ENOTFOUND) {
+		printf("HEAD not found. Creating first commit\n");
+		error = 0;
+	} else if (error != 0) {
+		const git_error *err = git_error_last();
+		if (err) printf("ERROR %d: %s\n", err->klass, err->message);
+		else printf("ERROR %d: no detailed info\n", error);
+	}
+
+	check_lg2(git_repository_index(&index, repo), "Could not open repository index", NULL);
+	check_lg2(git_index_write_tree(&tree_oid, index), "Could not write tree", NULL);;
+	check_lg2(git_index_write(index), "Could not write index", NULL);;
+
+	check_lg2(git_tree_lookup(&tree, repo, &tree_oid), "Error looking up tree", NULL);
+	
+	check_lg2(git_signature_default(&signature, repo), "Error creating signature", NULL);
+	
+	check_lg2(git_commit_create_v(
+		&commit_oid,
+		repo,
+		"HEAD",
+		signature,
+		signature,
+		NULL,
+		comment,
+		tree,
+		parent ? 1 : 0, parent), "Error creating commit", NULL);
+
+	git_index_free(index);
+	git_signature_free(signature);
+	git_tree_free(tree);	
+
+	return error;
+}
diff --git a/examples/common.h b/examples/common.h
index c01561b48..0126568ab 100644
--- a/examples/common.h
+++ b/examples/common.h
@@ -59,6 +59,7 @@ extern int lg2_blame(git_repository *repo, int argc, char **argv);
 extern int lg2_cat_file(git_repository *repo, int argc, char **argv);
 extern int lg2_checkout(git_repository *repo, int argc, char **argv);
 extern int lg2_clone(git_repository *repo, int argc, char **argv);
+extern int lg2_commit(git_repository *repo, int argc, char **argv);
 extern int lg2_config(git_repository *repo, int argc, char **argv);
 extern int lg2_describe(git_repository *repo, int argc, char **argv);
 extern int lg2_diff(git_repository *repo, int argc, char **argv);
@@ -71,6 +72,7 @@ extern int lg2_log(git_repository *repo, int argc, char **argv);
 extern int lg2_ls_files(git_repository *repo, int argc, char **argv);
 extern int lg2_ls_remote(git_repository *repo, int argc, char **argv);
 extern int lg2_merge(git_repository *repo, int argc, char **argv);
+extern int lg2_push(git_repository *repo, int argc, char **argv);
 extern int lg2_remote(git_repository *repo, int argc, char **argv);
 extern int lg2_rev_list(git_repository *repo, int argc, char **argv);
 extern int lg2_rev_parse(git_repository *repo, int argc, char **argv);
diff --git a/examples/general.c b/examples/general.c
index ddc53c3e8..1622ff8b0 100644
--- a/examples/general.c
+++ b/examples/general.c
@@ -707,7 +707,7 @@ static void reference_listing(git_repository *repo)
 		git_reference_free(ref);
 	}
 
-	git_strarray_free(&ref_list);
+	git_strarray_dispose(&ref_list);
 }
 
 /**
diff --git a/examples/lg2.c b/examples/lg2.c
index a3987c34d..7946bc215 100644
--- a/examples/lg2.c
+++ b/examples/lg2.c
@@ -15,6 +15,7 @@ struct {
 	{ "cat-file",     lg2_cat_file,     1 },
 	{ "checkout",     lg2_checkout,     1 },
 	{ "clone",        lg2_clone,        0 },
+	{ "commit",       lg2_commit,       1 },
 	{ "config",       lg2_config,       1 },
 	{ "describe",     lg2_describe,     1 },
 	{ "diff",         lg2_diff,         1 },
@@ -27,6 +28,7 @@ struct {
 	{ "ls-files",     lg2_ls_files,     1 },
 	{ "ls-remote",    lg2_ls_remote,    1 },
 	{ "merge",        lg2_merge,        1 },
+	{ "push",         lg2_push,        1  },
 	{ "remote",       lg2_remote,       1 },
 	{ "rev-list",     lg2_rev_list,     1 },
 	{ "rev-parse",    lg2_rev_parse,    1 },
diff --git a/examples/log.c b/examples/log.c
index 3eee7d421..ee18df542 100644
--- a/examples/log.c
+++ b/examples/log.c
@@ -434,21 +434,28 @@ static int parse_options(
 		else if (!strcmp(a, "--reverse"))
 			set_sorting(s, GIT_SORT_REVERSE);
 		else if (match_str_arg(&opt->author, &args, "--author"))
-			/** Found valid --author */;
+			/** Found valid --author */
+			;
 		else if (match_str_arg(&opt->committer, &args, "--committer"))
-			/** Found valid --committer */;
+			/** Found valid --committer */
+			;
 		else if (match_str_arg(&opt->grep, &args, "--grep"))
-			/** Found valid --grep */;
+			/** Found valid --grep */
+			;
 		else if (match_str_arg(&s->repodir, &args, "--git-dir"))
-			/** Found git-dir. */;
+			/** Found git-dir. */
+			;
 		else if (match_int_arg(&opt->skip, &args, "--skip", 0))
-			/** Found valid --skip. */;
+			/** Found valid --skip. */
+			;
 		else if (match_int_arg(&opt->limit, &args, "--max-count", 0))
-			/** Found valid --max-count. */;
+			/** Found valid --max-count. */
+			;
 		else if (a[1] >= '0' && a[1] <= '9')
 			is_integer(&opt->limit, a + 1, 0);
 		else if (match_int_arg(&opt->limit, &args, "-n", 0))
-			/** Found valid -n. */;
+			/** Found valid -n. */
+			;
 		else if (!strcmp(a, "--merges"))
 			opt->min_parents = 2;
 		else if (!strcmp(a, "--no-merges"))
@@ -458,9 +465,11 @@ static int parse_options(
 		else if (!strcmp(a, "--no-max-parents"))
 			opt->max_parents = -1;
 		else if (match_int_arg(&opt->max_parents, &args, "--max-parents=", 1))
-			/** Found valid --max-parents. */;
+			/** Found valid --max-parents. */
+			;
 		else if (match_int_arg(&opt->min_parents, &args, "--min-parents=", 0))
-			/** Found valid --min_parents. */;
+			/** Found valid --min_parents. */
+			;
 		else if (!strcmp(a, "-p") || !strcmp(a, "-u") || !strcmp(a, "--patch"))
 			opt->show_diff = 1;
 		else if (!strcmp(a, "--log-size"))
diff --git a/examples/push.c b/examples/push.c
new file mode 100644
index 000000000..bcf307607
--- /dev/null
+++ b/examples/push.c
@@ -0,0 +1,56 @@
+/*
+ * libgit2 "push" example - shows how to push to remote
+ *
+ * Written by the libgit2 contributors
+ *
+ * To the extent possible under law, the author(s) have dedicated all copyright
+ * and related and neighboring rights to this software to the public domain
+ * worldwide. This software is distributed without any warranty.
+ *
+ * You should have received a copy of the CC0 Public Domain Dedication along
+ * with this software. If not, see
+ * <http://creativecommons.org/publicdomain/zero/1.0/>.
+ */
+
+#include "common.h"
+
+/**
+ * This example demonstrates the libgit2 push API to roughly
+ * simulate `git push`.
+ *
+ * This does not have:
+ *
+ * - Robust error handling
+ * - Any of the `git push` options
+ *
+ * This does have:
+ *
+ * - Example of push to origin/master
+ * 
+ */
+
+/** Entry point for this command */
+int lg2_push(git_repository *repo, int argc, char **argv) {
+	git_push_options options;
+	git_remote* remote = NULL;
+	char *refspec = "refs/heads/master";
+	const git_strarray refspecs = {
+		&refspec,
+		1
+	};
+
+    /* Validate args */
+	if (argc > 1) {
+		printf ("USAGE: %s\n\nsorry, no arguments supported yet\n", argv[0]);
+		return -1;
+	}
+
+	check_lg2(git_remote_lookup(&remote, repo, "origin" ), "Unable to lookup remote", NULL);
+	
+	check_lg2(git_push_options_init(&options, GIT_PUSH_OPTIONS_VERSION ), "Error initializing push", NULL);
+
+	check_lg2(git_remote_push(remote, &refspecs, &options), "Error pushing", NULL);
+
+	printf("pushed\n");
+	return 0;
+}
diff --git a/examples/remote.c b/examples/remote.c
index 34d886526..57f758c6c 100644
--- a/examples/remote.c
+++ b/examples/remote.c
@@ -129,7 +129,7 @@ static int cmd_rename(git_repository *repo, struct remote_opts *o)
 		puts(problems.strings[0]);
 	}
 
-	git_strarray_free(&problems);
+	git_strarray_dispose(&problems);
 
 	return retval;
 }
@@ -207,7 +207,7 @@ static int cmd_show(git_repository *repo, struct remote_opts *o)
 		git_remote_free(remote);
 	}
 
-	git_strarray_free(&remotes);
+	git_strarray_dispose(&remotes);
 
 	return 0;
 }
diff --git a/examples/tag.c b/examples/tag.c
index 440829419..03d9c2bf9 100644
--- a/examples/tag.c
+++ b/examples/tag.c
@@ -162,7 +162,7 @@ static void action_list_tags(tag_state *state)
 		each_tag(tag_names.strings[i], state);
 	}
 
-	git_strarray_free(&tag_names);
+	git_strarray_dispose(&tag_names);
 }
 
 static void action_delete_tag(tag_state *state)
diff --git a/fuzzers/corpora/midx/037cbbe0dc03807dd9d9e8629f1712d7df34ee18 b/fuzzers/corpora/midx/037cbbe0dc03807dd9d9e8629f1712d7df34ee18
new file mode 100644
index 000000000..2e5bda8c6
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diff --git a/fuzzers/corpora/midx/039ee34fef8f323ed618a10abc0109df123d0cb5 b/fuzzers/corpora/midx/039ee34fef8f323ed618a10abc0109df123d0cb5
new file mode 100644
index 000000000..0c97a38f5
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diff --git a/fuzzers/corpora/midx/054ee2c82bdb6a170106eb5d35f21bde2119d584 b/fuzzers/corpora/midx/054ee2c82bdb6a170106eb5d35f21bde2119d584
new file mode 100644
index 000000000..f7711e496
--- /dev/null
+++ b/fuzzers/corpora/midx/054ee2c82bdb6a170106eb5d35f21bde2119d584
@@ -0,0 +1 @@
+ăM˙ăa
\ No newline at end of file
diff --git a/fuzzers/corpora/midx/055ca4cbc961ebf5fd5c922b4f73880d3fbfe39d b/fuzzers/corpora/midx/055ca4cbc961ebf5fd5c922b4f73880d3fbfe39d
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diff --git a/fuzzers/corpora/midx/08495c5f3828a56c167de870d385c46ffdce03c5 b/fuzzers/corpora/midx/08495c5f3828a56c167de870d385c46ffdce03c5
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index 000000000..b4f569772
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diff --git a/fuzzers/corpora/midx/08ec8594e5b35fb9e8e0726584f720154f0b2b5d b/fuzzers/corpora/midx/08ec8594e5b35fb9e8e0726584f720154f0b2b5d
new file mode 100644
index 000000000..772b4fd4f
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diff --git a/fuzzers/corpora/midx/0903e378a493c596298074d6bff8de7f9ac25aa7 b/fuzzers/corpora/midx/0903e378a493c596298074d6bff8de7f9ac25aa7
new file mode 100644
index 000000000..34f5f3b25
--- /dev/null
+++ b/fuzzers/corpora/midx/0903e378a493c596298074d6bff8de7f9ac25aa7
@@ -0,0 +1 @@
+ăü7
\ No newline at end of file
diff --git a/fuzzers/corpora/midx/09144a846f90f894049ef8a0ed0cc7ab4588dc6c b/fuzzers/corpora/midx/09144a846f90f894049ef8a0ed0cc7ab4588dc6c
new file mode 100644
index 000000000..ce7a43d9c
--- /dev/null
+++ b/fuzzers/corpora/midx/09144a846f90f894049ef8a0ed0cc7ab4588dc6c
@@ -0,0 +1 @@
+ĂŘseed
\ No newline at end of file
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diff --git a/fuzzers/corpora/midx/0de38e2cb13167df7d5a882570633596f64bc4f4 b/fuzzers/corpora/midx/0de38e2cb13167df7d5a882570633596f64bc4f4
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index 000000000..80a27f682
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diff --git a/fuzzers/corpora/midx/0de96aa193045315457ade63c2614610c503db9e b/fuzzers/corpora/midx/0de96aa193045315457ade63c2614610c503db9e
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index 000000000..342c6c9a6
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diff --git a/fuzzers/corpora/midx/0e02deca2b16d71f8637933bd56dc8592ed9fdff b/fuzzers/corpora/midx/0e02deca2b16d71f8637933bd56dc8592ed9fdff
new file mode 100644
index 000000000..d3b5fe27f
--- /dev/null
+++ b/fuzzers/corpora/midx/0e02deca2b16d71f8637933bd56dc8592ed9fdff
@@ -0,0 +1 @@
+ăH
\ No newline at end of file
diff --git a/fuzzers/corpora/midx/0e44fc9176fe2c1bae4209369da5bc057f54b2d2 b/fuzzers/corpora/midx/0e44fc9176fe2c1bae4209369da5bc057f54b2d2
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diff --git a/fuzzers/corpora/midx/0f6c5fc9b6a68835364bbef8937560ee5a481938 b/fuzzers/corpora/midx/0f6c5fc9b6a68835364bbef8937560ee5a481938
new file mode 100644
index 000000000..309e2d84f
--- /dev/null
+++ b/fuzzers/corpora/midx/0f6c5fc9b6a68835364bbef8937560ee5a481938
@@ -0,0 +1 @@
+©*
\ No newline at end of file
diff --git a/fuzzers/corpora/midx/10d542d5c7da060a5f0664e21478a0d598e29844 b/fuzzers/corpora/midx/10d542d5c7da060a5f0664e21478a0d598e29844
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index 000000000..777d32aa0
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diff --git a/fuzzers/corpora/midx/118735f7786ae6b4c2f6b36314ab1f2cafe9c3c8 b/fuzzers/corpora/midx/118735f7786ae6b4c2f6b36314ab1f2cafe9c3c8
new file mode 100644
index 000000000..a91dbc912
--- /dev/null
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diff --git a/fuzzers/corpora/midx/f101a2fe93dfaaed1c596022b4e509cf3a591c8a b/fuzzers/corpora/midx/f101a2fe93dfaaed1c596022b4e509cf3a591c8a
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index 000000000..5576bd013
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diff --git a/fuzzers/corpora/midx/f1101f71657385174f8cb920026a761404b4395d b/fuzzers/corpora/midx/f1101f71657385174f8cb920026a761404b4395d
new file mode 100644
index 000000000..59bd02e18
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diff --git a/fuzzers/corpora/midx/f138c84e42d3cc61a219c4be9db791750f0541c8 b/fuzzers/corpora/midx/f138c84e42d3cc61a219c4be9db791750f0541c8
new file mode 100644
index 000000000..ab2d713fa
--- /dev/null
+++ b/fuzzers/corpora/midx/f138c84e42d3cc61a219c4be9db791750f0541c8
@@ -0,0 +1 @@
+ă
]]˙˙˙˙
˙s5e
\ No newline at end of file
diff --git a/fuzzers/corpora/midx/f1da273522bfff4a4971b4ffc31e365f60fdbbfe b/fuzzers/corpora/midx/f1da273522bfff4a4971b4ffc31e365f60fdbbfe
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diff --git a/fuzzers/corpora/midx/f4cde4083a974d755a38bf5ea3820f78b576754a b/fuzzers/corpora/midx/f4cde4083a974d755a38bf5ea3820f78b576754a
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index 000000000..0699a327c
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diff --git a/fuzzers/corpora/midx/f5888d0dcacda196d73772aabc18fe2ad6e1dfa2 b/fuzzers/corpora/midx/f5888d0dcacda196d73772aabc18fe2ad6e1dfa2
new file mode 100644
index 000000000..488911f2f
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diff --git a/fuzzers/corpora/midx/f5c3577a62d401f071d5edaa77c54ae98d6a0318 b/fuzzers/corpora/midx/f5c3577a62d401f071d5edaa77c54ae98d6a0318
new file mode 100644
index 000000000..bfec0079b
--- /dev/null
+++ b/fuzzers/corpora/midx/f5c3577a62d401f071d5edaa77c54ae98d6a0318
@@ -0,0 +1 @@
+Ďďďďďďďďďďďďďďďďďďďďďďďďďďďďďďďďďďďďďďďďďďďďďďďďďďďďďďďďďďďďďďďďď
\ No newline at end of file
diff --git a/fuzzers/corpora/midx/f5dee0d9da0d6950069ac36b1880090a20f50f3e b/fuzzers/corpora/midx/f5dee0d9da0d6950069ac36b1880090a20f50f3e
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diff --git a/fuzzers/corpora/midx/f605fff495fef2719585c706c05c350812402a35 b/fuzzers/corpora/midx/f605fff495fef2719585c706c05c350812402a35
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diff --git a/fuzzers/corpora/midx/ff164dfc56dd28709488130dc6dfc17406bf9e9d b/fuzzers/corpora/midx/ff164dfc56dd28709488130dc6dfc17406bf9e9d
new file mode 100644
index 000000000..ceda10e93
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diff --git a/fuzzers/corpora/midx/ff7035b3c055718728a6025b3cdf55c34c4c744b b/fuzzers/corpora/midx/ff7035b3c055718728a6025b3cdf55c34c4c744b
new file mode 100644
index 000000000..8c963ab05
Binary files /dev/null and b/fuzzers/corpora/midx/ff7035b3c055718728a6025b3cdf55c34c4c744b differ
diff --git a/fuzzers/midx_fuzzer.c b/fuzzers/midx_fuzzer.c
new file mode 100644
index 000000000..e67873faa
--- /dev/null
+++ b/fuzzers/midx_fuzzer.c
@@ -0,0 +1,76 @@
+/*
+ * libgit2 multi-pack-index fuzzer target.
+ *
+ * Copyright (C) the libgit2 contributors. All rights reserved.
+ *
+ * This file is part of libgit2, distributed under the GNU GPL v2 with
+ * a Linking Exception. For full terms see the included COPYING file.
+ */
+
+#include <stdio.h>
+
+#include "git2.h"
+
+#include "buffer.h"
+#include "common.h"
+#include "futils.h"
+#include "hash.h"
+#include "midx.h"
+
+int LLVMFuzzerInitialize(int *argc, char ***argv)
+{
+	GIT_UNUSED(argc);
+	GIT_UNUSED(argv);
+
+	if (git_libgit2_init() < 0) {
+		fprintf(stderr, "Failed to initialize libgit2\n");
+		abort();
+	}
+	return 0;
+}
+
+int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size)
+{
+	git_midx_file idx = {{0}};
+	git_midx_entry e;
+	git_buf midx_buf = GIT_BUF_INIT;
+	git_oid oid = {{0}};
+	bool append_hash = false;
+
+	if (size < 4)
+		return 0;
+
+	/*
+	 * If the first byte in the stream has the high bit set, append the
+	 * SHA1 hash so that the packfile is somewhat valid.
+	 */
+	append_hash = *data & 0x80;
+	/* Keep a 4-byte alignment to avoid unaligned accesses. */
+	data += 4;
+	size -= 4;
+
+	if (append_hash) {
+		if (git_buf_init(&midx_buf, size + sizeof(oid)) < 0)
+			goto cleanup;
+		if (git_hash_buf(&oid, data, size) < 0) {
+			fprintf(stderr, "Failed to compute the SHA1 hash\n");
+			abort();
+		}
+		memcpy(midx_buf.ptr, data, size);
+		memcpy(midx_buf.ptr + size, &oid, sizeof(oid));
+	} else {
+		git_buf_attach_notowned(&midx_buf, (char *)data, size);
+	}
+
+	if (git_midx_parse(&idx, (const unsigned char *)git_buf_cstr(&midx_buf), git_buf_len(&midx_buf)) < 0)
+		goto cleanup;
+
+	/* Search for any oid, just to exercise that codepath. */
+	if (git_midx_entry_find(&e, &idx, &oid, GIT_OID_HEXSZ) < 0)
+		goto cleanup;
+
+cleanup:
+	git_midx_close(&idx);
+	git_buf_dispose(&midx_buf);
+	return 0;
+}
diff --git a/include/git2/annotated_commit.h b/include/git2/annotated_commit.h
index fa795bfc4..3b7103f20 100644
--- a/include/git2/annotated_commit.h
+++ b/include/git2/annotated_commit.h
@@ -78,7 +78,7 @@ GIT_EXTERN(int) git_annotated_commit_lookup(
 	const git_oid *id);
 
 /**
- * Creates a `git_annotated_comit` from a revision string.
+ * Creates a `git_annotated_commit` from a revision string.
  *
  * See `man gitrevisions`, or
  * http://git-scm.com/docs/git-rev-parse.html#_specifying_revisions for
diff --git a/include/git2/blame.h b/include/git2/blame.h
index 73f6cf979..f42c81552 100644
--- a/include/git2/blame.h
+++ b/include/git2/blame.h
@@ -47,6 +47,8 @@ typedef enum {
 	 * to canonical real names and email addresses. The mailmap will be read
 	 * from the working directory, or HEAD in a bare repository. */
 	GIT_BLAME_USE_MAILMAP = (1<<5),
+	/** Ignore whitespace differences */
+	GIT_BLAME_IGNORE_WHITESPACE = (1<<6),
 } git_blame_flag_t;
 
 /**
diff --git a/include/git2/common.h b/include/git2/common.h
index d6696061d..8dd30d506 100644
--- a/include/git2/common.h
+++ b/include/git2/common.h
@@ -205,7 +205,9 @@ typedef enum {
 	GIT_OPT_GET_PACK_MAX_OBJECTS,
 	GIT_OPT_SET_PACK_MAX_OBJECTS,
 	GIT_OPT_DISABLE_PACK_KEEP_FILE_CHECKS,
-	GIT_OPT_ENABLE_HTTP_EXPECT_CONTINUE
+	GIT_OPT_ENABLE_HTTP_EXPECT_CONTINUE,
+	GIT_OPT_GET_MWINDOW_FILE_LIMIT,
+	GIT_OPT_SET_MWINDOW_FILE_LIMIT
 } git_libgit2_opt_t;
 
 /**
@@ -227,8 +229,18 @@ typedef enum {
  *
  *	* opts(GIT_OPT_SET_MWINDOW_MAPPED_LIMIT, size_t):
  *
- *		>Set the maximum amount of memory that can be mapped at any time
- *		by the library
+ *		> Set the maximum amount of memory that can be mapped at any time
+ *		> by the library
+ *
+ *	* opts(GIT_OPT_GET_MWINDOW_FILE_LIMIT, size_t *):
+ *
+ *		> Get the maximum number of files that will be mapped at any time by the
+ *		> library
+ *
+ *	* opts(GIT_OPT_SET_MWINDOW_FILE_LIMIT, size_t):
+ *
+ *		> Set the maximum number of files that can be mapped at any time
+ *		> by the library. The default (0) is unlimited.
  *
  *	* opts(GIT_OPT_GET_SEARCH_PATH, int level, git_buf *buf)
  *
diff --git a/include/git2/deprecated.h b/include/git2/deprecated.h
index e5e56edae..3f285018d 100644
--- a/include/git2/deprecated.h
+++ b/include/git2/deprecated.h
@@ -102,7 +102,11 @@ GIT_EXTERN(int) git_blob_create_fromstream_commit(
 GIT_EXTERN(int) git_blob_create_frombuffer(
 	git_oid *id, git_repository *repo, const void *buffer, size_t len);
 
-/** Deprecated in favor of @see git_blob_filter */
+/** Deprecated in favor of `git_blob_filter`.
+ *
+ * @deprecated Use git_blob_filter
+ * @see git_blob_filter
+ */
 GIT_EXTERN(int) git_blob_filtered_content(
 	git_buf *out,
 	git_blob *blob,
@@ -233,7 +237,7 @@ GIT_EXTERN(void) giterr_clear(void);
 GIT_EXTERN(void) giterr_set_str(int error_class, const char *string);
 
 /**
- * Indicates that an out-of-memory situation occured.  This is an alias
+ * Indicates that an out-of-memory situation occurred.  This is an alias
  * of `git_error_set_oom` and is preserved for backward compatibility.
  *
  * This function is deprecated, but there is no plan to remove this
@@ -524,6 +528,42 @@ typedef int GIT_CALLBACK(git_headlist_cb)(git_remote_head *rhead, void *payload)
 
 /**@}*/
 
+/** @name Deprecated String Array Functions
+ *
+ * These types are retained for backward compatibility.  The newer
+ * versions of these values should be preferred in all new code.
+ *
+ * There is no plan to remove these backward compatibility values at
+ * this time.
+ */
+/**@{*/
+
+/**
+ * Copy a string array object from source to target.
+ *
+ * This function is deprecated, but there is no plan to remove this
+ * function at this time.
+ *
+ * @param tgt target
+ * @param src source
+ * @return 0 on success, < 0 on allocation failure
+ */
+GIT_EXTERN(int) git_strarray_copy(git_strarray *tgt, const git_strarray *src);
+
+/**
+ * Free the memory referred to by the git_strarray.  This is an alias of
+ * `git_strarray_dispose` and is preserved for backward compatibility.
+ *
+ * This function is deprecated, but there is no plan to remove this
+ * function at this time.
+ *
+ * @deprecated Use git_strarray_dispose
+ * @see git_strarray_dispose
+ */
+GIT_EXTERN(void) git_strarray_free(git_strarray *array);
+
+/**@}*/
+
 /** @name Deprecated Options Initialization Functions
  *
  * These functions are retained for backward compatibility.  The newer
diff --git a/include/git2/errors.h b/include/git2/errors.h
index 5c85c4d6c..8887b3299 100644
--- a/include/git2/errors.h
+++ b/include/git2/errors.h
@@ -107,7 +107,8 @@ typedef enum {
 	GIT_ERROR_PATCH,
 	GIT_ERROR_WORKTREE,
 	GIT_ERROR_SHA1,
-	GIT_ERROR_HTTP
+	GIT_ERROR_HTTP,
+	GIT_ERROR_INTERNAL
 } git_error_t;
 
 /**
diff --git a/include/git2/index.h b/include/git2/index.h
index 8723aa636..314135109 100644
--- a/include/git2/index.h
+++ b/include/git2/index.h
@@ -555,8 +555,7 @@ GIT_EXTERN(int) git_index_add_bypath(git_index *index, const char *path);
  *
  * If a previous index entry exists that has the same path as the
  * given 'entry', it will be replaced.  Otherwise, the 'entry' will be
- * added. The `id` and the `file_size` of the 'entry' are updated with the
- * real value of the blob.
+ * added.
  *
  * This forces the file to be added to the index, not looking
  * at gitignore rules.  Those rules can be evaluated through
diff --git a/include/git2/pack.h b/include/git2/pack.h
index 922a3cd9d..3b9beb665 100644
--- a/include/git2/pack.h
+++ b/include/git2/pack.h
@@ -155,7 +155,7 @@ GIT_EXTERN(int) git_packbuilder_write_buf(git_buf *buf, git_packbuilder *pb);
  * Write the new pack and corresponding index file to path.
  *
  * @param pb The packbuilder
- * @param path to the directory where the packfile and index should be stored
+ * @param path Path to the directory where the packfile and index should be stored, or NULL for default location
  * @param mode permissions to use creating a packfile or 0 for defaults
  * @param progress_cb function to call with progress information from the indexer (optional)
  * @param progress_cb_payload payload for the progress callback (optional)
diff --git a/include/git2/strarray.h b/include/git2/strarray.h
index 86fa25f3f..0f657e6c5 100644
--- a/include/git2/strarray.h
+++ b/include/git2/strarray.h
@@ -25,20 +25,16 @@ typedef struct git_strarray {
 } git_strarray;
 
 /**
- * Close a string array object
- *
- * This method should be called on `git_strarray` objects where the strings
- * array is allocated and contains allocated strings, such as what you
- * would get from `git_strarray_copy()`.  Not doing so, will result in a
- * memory leak.
+ * Free the strings contained in a string array.  This method should
+ * be called on `git_strarray` objects that were provided by the
+ * library.  Not doing so, will result in a memory leak.
  *
  * This does not free the `git_strarray` itself, since the library will
- * never allocate that object directly itself (it is more commonly embedded
- * inside another struct or created on the stack).
+ * never allocate that object directly itself.
  *
- * @param array git_strarray from which to free string data
+ * @param array The git_strarray that contains strings to free
  */
-GIT_EXTERN(void) git_strarray_free(git_strarray *array);
+GIT_EXTERN(void) git_strarray_dispose(git_strarray *array);
 
 /**
  * Copy a string array object from source to target.
diff --git a/include/git2/version.h b/include/git2/version.h
index 2d8708622..c1020bbea 100644
--- a/include/git2/version.h
+++ b/include/git2/version.h
@@ -7,12 +7,12 @@
 #ifndef INCLUDE_git_version_h__
 #define INCLUDE_git_version_h__
 
-#define LIBGIT2_VERSION "1.0.1"
+#define LIBGIT2_VERSION "1.1.0"
 #define LIBGIT2_VER_MAJOR 1
-#define LIBGIT2_VER_MINOR 0
-#define LIBGIT2_VER_REVISION 1
+#define LIBGIT2_VER_MINOR 1
+#define LIBGIT2_VER_REVISION 0
 #define LIBGIT2_VER_PATCH 0
 
-#define LIBGIT2_SOVERSION "1.0"
+#define LIBGIT2_SOVERSION "1.1"
 
 #endif
diff --git a/package.json b/package.json
index 79cddbee7..5e74f3bd5 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "libgit2",
-  "version": "1.0.1",
+  "version": "1.1.0",
   "repo": "https://github.com/libgit2/libgit2",
   "description": " A cross-platform, linkable library implementation of Git that you can use in your application.",
   "install": "mkdir build && cd build && cmake .. && cmake --build ."
diff --git a/script/release.py b/script/release.py
index 3d8e9b806..1a240deca 100755
--- a/script/release.py
+++ b/script/release.py
@@ -40,6 +40,15 @@ def verify_version(version):
         'SOVERSION':    [ '"{}.{}"'.format(version.major, version.minor), None ],
     }
 
+    # Parse CMakeLists
+    with open('CMakeLists.txt') as f:
+        for line in f.readlines():
+            if line.startswith('project(libgit2 VERSION "{}"'.format(version)):
+                break
+        else:
+            raise Error("cmake: invalid project definition")
+
+    # Parse version.h
     with open('include/git2/version.h') as f:
         lines = f.readlines()
 
@@ -166,7 +175,7 @@ def main():
     parser.add_argument('--tree', default='HEAD', help='tree to create release for (default: HEAD)')
     parser.add_argument('--dryrun', action='store_true', help='generate release, but do not post it')
     parser.add_argument('--repository', default='libgit2/libgit2', help='GitHub repository to create repository in')
-    parser.add_argument('--user', help='user to authenitcate as')
+    parser.add_argument('--user', help='user to authenticate as')
     parser.add_argument('--password', help='password to authenticate with')
     parser.add_argument('version', type=Version, help='version of the new release')
     args = parser.parse_args()
diff --git a/script/sanitizers.supp b/script/sanitizers.supp
new file mode 100644
index 000000000..4e0e9be83
--- /dev/null
+++ b/script/sanitizers.supp
@@ -0,0 +1,4 @@
+[undefined]
+# This library allows unaligned access on Intel-like processors. Prevent UBSan
+# from complaining about that.
+fun:sha1_compression_states
diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index dff1d94e8..d01cc6458 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -1,3 +1,6 @@
+add_library(git2internal OBJECT)
+set_target_properties(git2internal PROPERTIES C_STANDARD 90)
+
 IF(DEBUG_POOL)
 	SET(GIT_DEBUG_POOL 1)
 ENDIF()
@@ -21,6 +24,8 @@ SET(LIBGIT2_INCLUDES
 SET(LIBGIT2_SYSTEM_INCLUDES "")
 SET(LIBGIT2_LIBS "")
 
+enable_warnings(missing-declarations)
+
 # Enable tracing
 IF(ENABLE_TRACE)
 	SET(GIT_TRACE 1)
@@ -36,19 +41,19 @@ CHECK_PROTOTYPE_DEFINITION(qsort_r
 	"void qsort_r(void *base, size_t nmemb, size_t size, void *thunk, int (*compar)(void *, const void *, const void *))"
 	"" "stdlib.h" HAVE_QSORT_R_BSD)
 IF (HAVE_QSORT_R_BSD)
-	ADD_DEFINITIONS(-DHAVE_QSORT_R_BSD)
+	target_compile_definitions(git2internal PRIVATE HAVE_QSORT_R_BSD)
 ENDIF()
 
 CHECK_PROTOTYPE_DEFINITION(qsort_r
 	"void qsort_r(void *base, size_t nmemb, size_t size, int (*compar)(const void *, const void *, void *), void *arg)"
 	"" "stdlib.h" HAVE_QSORT_R_GNU)
 IF (HAVE_QSORT_R_GNU)
-	ADD_DEFINITIONS(-DHAVE_QSORT_R_GNU)
+	target_compile_definitions(git2internal PRIVATE HAVE_QSORT_R_GNU)
 ENDIF()
 
 CHECK_FUNCTION_EXISTS(qsort_s HAVE_QSORT_S)
 IF (HAVE_QSORT_S)
-	ADD_DEFINITIONS(-DHAVE_QSORT_S)
+	target_compile_definitions(git2internal PRIVATE HAVE_QSORT_S)
 ENDIF ()
 
 # Find required dependencies
@@ -76,12 +81,15 @@ ENDIF()
 ADD_FEATURE_INFO(threadsafe THREADSAFE "threadsafe support")
 
 
-IF (WIN32 AND EMBED_SSH_PATH)
-	FILE(GLOB SRC_SSH "${EMBED_SSH_PATH}/src/*.c")
-	LIST(APPEND LIBGIT2_SYSTEM_INCLUDES "${EMBED_SSH_PATH}/include")
-	FILE(WRITE "${EMBED_SSH_PATH}/src/libssh2_config.h" "#define HAVE_WINCNG\n#define LIBSSH2_WINCNG\n#include \"../win32/libssh2_config.h\"")
-	SET(GIT_SSH 1)
-ENDIF()
+if(WIN32 AND EMBED_SSH_PATH)
+	file(GLOB SRC_SSH "${EMBED_SSH_PATH}/src/*.c")
+	list(SORT SRC_SSH)
+	target_sources(git2internal PRIVATE ${SRC_SSH})
+
+	list(APPEND LIBGIT2_SYSTEM_INCLUDES "${EMBED_SSH_PATH}/include")
+	file(WRITE "${EMBED_SSH_PATH}/src/libssh2_config.h" "#define HAVE_WINCNG\n#define LIBSSH2_WINCNG\n#include \"../win32/libssh2_config.h\"")
+	set(GIT_SSH 1)
+endif()
 
 IF (WIN32 AND WINHTTP)
 	SET(GIT_WINHTTP 1)
@@ -101,8 +109,9 @@ IF (WIN32 AND WINHTTP)
 	LIST(APPEND LIBGIT2_PC_LIBS "-lrpcrt4" "-lcrypt32" "-lole32")
 ENDIF()
 
-Include(SelectHTTPSBackend)
-Include(SelectHashes)
+include(SelectHTTPSBackend)
+include(SelectHashes)
+target_sources(git2internal PRIVATE ${SRC_SHA1})
 
 # Specify regular expression implementation
 FIND_PACKAGE(PCRE)
@@ -264,36 +273,43 @@ ELSEIF (HAVE_STRUCT_STAT_ST_MTIME_NSEC)
 	SET(GIT_USE_STAT_MTIME_NSEC 1)
 ENDIF()
 
-ADD_DEFINITIONS(-D_FILE_OFFSET_BITS=64)
+target_compile_definitions(git2internal PRIVATE _FILE_OFFSET_BITS=64)
 
 # Collect sourcefiles
-FILE(GLOB SRC_H
+file(GLOB SRC_H
 	"${libgit2_SOURCE_DIR}/include/git2.h"
 	"${libgit2_SOURCE_DIR}/include/git2/*.h"
 	"${libgit2_SOURCE_DIR}/include/git2/sys/*.h")
+list(SORT SRC_H)
+target_sources(git2internal PRIVATE ${SRC_H})
 
 # On Windows use specific platform sources
-IF (WIN32 AND NOT CYGWIN)
-	IF(MSVC)
-		SET(WIN_RC "win32/git2.rc")
-	ENDIF()
+if(WIN32 AND NOT CYGWIN)
+	SET(WIN_RC "win32/git2.rc")
 
-	FILE(GLOB SRC_OS win32/*.c win32/*.h)
-ELSEIF (AMIGA)
-	ADD_DEFINITIONS(-DNO_ADDRINFO -DNO_READDIR_R -DNO_MMAP)
-ELSE()
-	FILE(GLOB SRC_OS unix/*.c unix/*.h)
-ENDIF()
+	file(GLOB SRC_OS win32/*.c win32/*.h)
+	list(SORT SRC_OS)
+	target_sources(git2internal PRIVATE ${SRC_OS})
+elseif(AMIGA)
+	target_compile_definitions(git2internal PRIVATE NO_ADDRINFO NO_READDIR_R NO_MMAP)
+else()
+	file(GLOB SRC_OS unix/*.c unix/*.h)
+	list(SORT SRC_OS)
+	target_sources(git2internal PRIVATE ${SRC_OS})
+endif()
 
 IF (USE_LEAK_CHECKER STREQUAL "valgrind")
-	ADD_DEFINITIONS(-DVALGRIND)
+	target_compile_definitions(git2internal PRIVATE VALGRIND)
 ENDIF()
 
-FILE(GLOB SRC_GIT2 *.c *.h
+file(GLOB SRC_GIT2 *.c *.h
 	allocators/*.c allocators/*.h
 	streams/*.c streams/*.h
 	transports/*.c transports/*.h
 	xdiff/*.c xdiff/*.h)
+list(SORT SRC_GIT2)
+target_sources(git2internal PRIVATE ${SRC_GIT2})
+
 IF(APPLE)
 	# The old Secure Transport API has been deprecated in macOS 10.15.
 	SET_SOURCE_FILES_PROPERTIES(streams/stransport.c PROPERTIES COMPILE_FLAGS -Wno-deprecated)
@@ -319,10 +335,6 @@ ENDIF()
 
 CONFIGURE_FILE(features.h.in git2/sys/features.h)
 
-SET(LIBGIT2_SOURCES ${SRC_H} ${SRC_GIT2} ${SRC_OS} ${SRC_SSH} ${SRC_SHA1})
-
-ADD_LIBRARY(git2internal OBJECT ${LIBGIT2_SOURCES})
-SET_TARGET_PROPERTIES(git2internal PROPERTIES C_STANDARD 90)
 IDE_SPLIT_SOURCES(git2internal)
 LIST(APPEND LIBGIT2_OBJECTS $<TARGET_OBJECTS:git2internal>)
 
@@ -358,19 +370,19 @@ ENDIF()
 
 IDE_SPLIT_SOURCES(git2)
 
-IF (SONAME)
-	SET_TARGET_PROPERTIES(git2 PROPERTIES VERSION ${LIBGIT2_VERSION_STRING})
-	SET_TARGET_PROPERTIES(git2 PROPERTIES SOVERSION ${LIBGIT2_SOVERSION})
-	IF (LIBGIT2_FILENAME)
-		ADD_DEFINITIONS(-DLIBGIT2_FILENAME=\"${LIBGIT2_FILENAME}\")
-		SET_TARGET_PROPERTIES(git2 PROPERTIES OUTPUT_NAME ${LIBGIT2_FILENAME})
-	ELSEIF (DEFINED LIBGIT2_PREFIX)
-		SET_TARGET_PROPERTIES(git2 PROPERTIES PREFIX "${LIBGIT2_PREFIX}")
-	ENDIF()
-ENDIF()
+if(SONAME)
+	set_target_properties(git2 PROPERTIES VERSION ${libgit2_VERSION})
+	set_target_properties(git2 PROPERTIES SOVERSION "${libgit2_VERSION_MAJOR}.${libgit2_VERSION_MINOR}")
+	if(LIBGIT2_FILENAME)
+		target_compile_definitions(git2internal PRIVATE LIBGIT2_FILENAME=\"${LIBGIT2_FILENAME}\")
+		set_target_properties(git2 PROPERTIES OUTPUT_NAME ${LIBGIT2_FILENAME})
+	elseif(DEFINED LIBGIT2_PREFIX)
+		set_target_properties(git2 PROPERTIES PREFIX "${LIBGIT2_PREFIX}")
+	endif()
+endif()
 
 PKG_BUILD_CONFIG(NAME libgit2
-	VERSION ${LIBGIT2_VERSION_STRING}
+	VERSION ${libgit2_VERSION}
 	DESCRIPTION "The git library, take 2"
 	LIBS_SELF git2
 	PRIVATE_LIBS ${LIBGIT2_PC_LIBS}
diff --git a/src/apply.c b/src/apply.c
index fc60e1418..b0be2d8e6 100644
--- a/src/apply.c
+++ b/src/apply.c
@@ -63,7 +63,11 @@ static int patch_image_init_fromstr(
 
 	memset(out, 0x0, sizeof(patch_image));
 
-	git_pool_init(&out->pool, sizeof(git_diff_line));
+	if (git_pool_init(&out->pool, sizeof(git_diff_line)) < 0)
+		return -1;
+
+	if (!in_len)
+		return 0;
 
 	for (start = in; start < in + in_len; start = end) {
 		end = memchr(start, '\n', in_len - (start - in));
diff --git a/src/assert_safe.h b/src/assert_safe.h
new file mode 100644
index 000000000..8c261100f
--- /dev/null
+++ b/src/assert_safe.h
@@ -0,0 +1,58 @@
+/*
+ * Copyright (C) the libgit2 contributors. All rights reserved.
+ *
+ * This file is part of libgit2, distributed under the GNU GPL v2 with
+ * a Linking Exception. For full terms see the included COPYING file.
+ */
+#ifndef INCLUDE_assert_safe_h__
+#define INCLUDE_assert_safe_h__
+
+/*
+ * In a debug build, we'll assert(3) for aide in debugging.  In release
+ * builds, we will provide macros that will set an error message that
+ * indicate a failure and return.  Note that memory leaks can occur in
+ * a release-mode assertion failure -- it is impractical to provide
+ * safe clean up routines in these very extreme failures, but care
+ * should be taken to not leak very large objects.
+ */
+
+#if (defined(_DEBUG) || defined(GIT_ASSERT_HARD)) && GIT_ASSERT_HARD != 0
+# include <assert.h>
+
+# define GIT_ASSERT(expr) assert(expr)
+# define GIT_ASSERT_ARG(expr) assert(expr)
+
+# define GIT_ASSERT_WITH_RETVAL(expr, fail) assert(expr)
+# define GIT_ASSERT_ARG_WITH_RETVAL(expr, fail) assert(expr)
+#else
+
+/** Internal consistency check to stop the function. */
+# define GIT_ASSERT(expr) GIT_ASSERT_WITH_RETVAL(expr, -1)
+
+/**
+ * Assert that a consumer-provided argument is valid, setting an
+ * actionable error message and returning -1 if it is not.
+ */
+# define GIT_ASSERT_ARG(expr) GIT_ASSERT_ARG_WITH_RETVAL(expr, -1)
+
+/** Internal consistency check to return the `fail` param on failure. */
+# define GIT_ASSERT_WITH_RETVAL(expr, fail) \
+	GIT_ASSERT__WITH_RETVAL(expr, GIT_ERROR_INTERNAL, "unrecoverable internal error", fail)
+
+/**
+ * Assert that a consumer-provided argument is valid, setting an
+ * actionable error message and returning the `fail` param if not.
+ */
+# define GIT_ASSERT_ARG_WITH_RETVAL(expr, fail) \
+	GIT_ASSERT__WITH_RETVAL(expr, GIT_ERROR_INVALID, "invalid argument", fail)
+
+# define GIT_ASSERT__WITH_RETVAL(expr, code, msg, fail) do { \
+		if (!(expr)) { \
+			git_error_set(code, "%s: '%s'", msg, #expr); \
+			return fail; \
+		} \
+	} while(0)
+
+#endif /* GIT_ASSERT_HARD */
+
+#endif
diff --git a/src/attr_file.c b/src/attr_file.c
index 82da5268f..3f69b5ffc 100644
--- a/src/attr_file.c
+++ b/src/attr_file.c
@@ -41,16 +41,21 @@ int git_attr_file__new(
 
 	if (git_mutex_init(&attrs->lock) < 0) {
 		git_error_set(GIT_ERROR_OS, "failed to initialize lock");
-		git__free(attrs);
-		return -1;
+		goto on_error;
 	}
 
-	git_pool_init(&attrs->pool, 1);
+	if (git_pool_init(&attrs->pool, 1) < 0)
+		goto on_error;
+
 	GIT_REFCOUNT_INC(attrs);
 	attrs->entry  = entry;
 	attrs->source = source;
 	*out = attrs;
 	return 0;
+
+on_error:
+	git__free(attrs);
+	return -1;
 }
 
 int git_attr_file__clear_rules(git_attr_file *file, bool need_lock)
diff --git a/src/attrcache.c b/src/attrcache.c
index f02dd9d1d..47fb675e0 100644
--- a/src/attrcache.c
+++ b/src/attrcache.c
@@ -391,11 +391,10 @@ int git_attr_cache__init(git_repository *repo)
 	 * hashtable for attribute macros, and string pool
 	 */
 	if ((ret = git_strmap_new(&cache->files)) < 0 ||
-	    (ret = git_strmap_new(&cache->macros)) < 0)
+	    (ret = git_strmap_new(&cache->macros)) < 0 ||
+	    (ret = git_pool_init(&cache->pool, 1)) < 0)
 		goto cancel;
 
-	git_pool_init(&cache->pool, 1);
-
 	cache = git__compare_and_swap(&repo->attrcache, NULL, cache);
 	if (cache)
 		goto cancel; /* raced with another thread, free this but no error */
diff --git a/src/blame.c b/src/blame.c
index 23c21027a..1046dab55 100644
--- a/src/blame.c
+++ b/src/blame.c
@@ -538,7 +538,9 @@ int git_blame_options_init(git_blame_options *opts, unsigned int version)
 	return 0;
 }
 
+#ifndef GIT_DEPRECATE_HARD
 int git_blame_init_options(git_blame_options *opts, unsigned int version)
 {
 	return git_blame_options_init(opts, version);
 }
+#endif
diff --git a/src/blame_git.c b/src/blame_git.c
index a9157c4ed..073137a68 100644
--- a/src/blame_git.c
+++ b/src/blame_git.c
@@ -365,11 +365,14 @@ static void trim_common_tail(mmfile_t *a, mmfile_t *b, long ctx)
 	b->size -= trimmed - recovered;
 }
 
-static int diff_hunks(mmfile_t file_a, mmfile_t file_b, void *cb_data)
+static int diff_hunks(mmfile_t file_a, mmfile_t file_b, void *cb_data, git_blame_options *options)
 {
-	xpparam_t xpp = {0};
 	xdemitconf_t xecfg = {0};
 	xdemitcb_t ecb = {0};
+	xpparam_t xpp = {0};
+
+	if (options->flags & GIT_BLAME_IGNORE_WHITESPACE)
+		xpp.flags |= XDF_IGNORE_WHITESPACE;
 
 	xecfg.hunk_func = my_emit;
 	ecb.priv = cb_data;
@@ -409,7 +412,7 @@ static int pass_blame_to_parent(
 	fill_origin_blob(parent, &file_p);
 	fill_origin_blob(target, &file_o);
 
-	if (diff_hunks(file_p, file_o, &d) < 0)
+	if (diff_hunks(file_p, file_o, &d, &blame->options) < 0)
 		return -1;
 
 	/* The reset (i.e. anything after tlno) are the same as the parent */
diff --git a/src/blob.c b/src/blob.c
index 5e734e2c1..da4e6ffa5 100644
--- a/src/blob.c
+++ b/src/blob.c
@@ -445,6 +445,7 @@ int git_blob_filter(
 
 /* Deprecated functions */
 
+#ifndef GIT_DEPRECATE_HARD
 int git_blob_create_frombuffer(
 	git_oid *id, git_repository *repo, const void *buffer, size_t len)
 {
@@ -491,3 +492,4 @@ int git_blob_filtered_content(
 
 	return git_blob_filter(out, blob, path, &opts);
 }
+#endif
diff --git a/src/branch.c b/src/branch.c
index 8926c8956..715f6cf99 100644
--- a/src/branch.c
+++ b/src/branch.c
@@ -134,39 +134,37 @@ int git_branch_create_from_annotated(
 		repository, branch_name, commit->commit, commit->description, force);
 }
 
-static int branch_equals(git_repository *repo, const char *path, void *payload)
+static int branch_is_checked_out(git_repository *worktree, void *payload)
 {
 	git_reference *branch = (git_reference *) payload;
 	git_reference *head = NULL;
-	int equal = 0;
+	int error;
 
-	if (git_reference__read_head(&head, repo, path) < 0 ||
-		git_reference_type(head) != GIT_REFERENCE_SYMBOLIC)
-		goto done;
+	if (git_repository_is_bare(worktree))
+		return 0;
 
-	equal = !git__strcmp(head->target.symbolic, branch->name);
+	if ((error = git_reference_lookup(&head, worktree, GIT_HEAD_FILE)) < 0) {
+		if (error == GIT_ENOTFOUND)
+			error = 0;
+		goto out;
+	}
 
-done:
+	if (git_reference_type(head) != GIT_REFERENCE_SYMBOLIC)
+		goto out;
+
+	error = !git__strcmp(head->target.symbolic, branch->name);
+
+out:
 	git_reference_free(head);
-	return equal;
+	return error;
 }
 
 int git_branch_is_checked_out(const git_reference *branch)
 {
-	git_repository *repo;
-	int flags = 0;
-
-	assert(branch);
-
 	if (!git_reference_is_branch(branch))
 		return 0;
-
-	repo = git_reference_owner(branch);
-
-	if (git_repository_is_bare(repo))
-		flags |= GIT_REPOSITORY_FOREACH_HEAD_SKIP_REPO;
-
-	return git_repository_foreach_head(repo, branch_equals, flags, (void *) branch) == 1;
+	return git_repository_foreach_worktree(git_reference_owner(branch),
+					       branch_is_checked_out, (void *)branch) == 1;
 }
 
 int git_branch_delete(git_reference *branch)
@@ -548,7 +546,7 @@ cleanup:
 	if (error < 0)
 		git_buf_dispose(buf);
 
-	git_strarray_free(&remote_list);
+	git_strarray_dispose(&remote_list);
 	return error;
 }
 
diff --git a/src/buffer.c b/src/buffer.c
index 328fdfe7f..c203650c7 100644
--- a/src/buffer.c
+++ b/src/buffer.c
@@ -133,10 +133,12 @@ void git_buf_dispose(git_buf *buf)
 	git_buf_init(buf, 0);
 }
 
+#ifndef GIT_DEPRECATE_HARD
 void git_buf_free(git_buf *buf)
 {
 	git_buf_dispose(buf);
 }
+#endif
 
 void git_buf_sanitize(git_buf *buf)
 {
@@ -363,7 +365,7 @@ int git_buf_encode_base85(git_buf *buf, const char *data, size_t len)
 
 		for (i = 24; i >= 0; i -= 8) {
 			uint8_t ch = *data++;
-			acc |= ch << i;
+			acc |= (uint32_t)ch << i;
 
 			if (--len == 0)
 				break;
@@ -757,7 +759,8 @@ int git_buf_join(
 	ssize_t offset_a = -1;
 
 	/* not safe to have str_b point internally to the buffer */
-	assert(str_b < buf->ptr || str_b >= buf->ptr + buf->size);
+	if (buf->size)
+		assert(str_b < buf->ptr || str_b >= buf->ptr + buf->size);
 
 	/* figure out if we need to insert a separator */
 	if (separator && strlen_a) {
@@ -767,7 +770,7 @@ int git_buf_join(
 	}
 
 	/* str_a could be part of the buffer */
-	if (str_a >= buf->ptr && str_a < buf->ptr + buf->size)
+	if (buf->size && str_a >= buf->ptr && str_a < buf->ptr + buf->size)
 		offset_a = str_a - buf->ptr;
 
 	GIT_ERROR_CHECK_ALLOC_ADD(&alloc_len, strlen_a, strlen_b);
diff --git a/src/cache.c b/src/cache.c
index af42b3959..a76da50d7 100644
--- a/src/cache.c
+++ b/src/cache.c
@@ -41,27 +41,6 @@ int git_cache_set_max_object_size(git_object_t type, size_t size)
 	return 0;
 }
 
-void git_cache_dump_stats(git_cache *cache)
-{
-	git_cached_obj *object;
-
-	if (git_cache_size(cache) == 0)
-		return;
-
-	printf("Cache %p: %"PRIuZ" items cached, %"PRIdZ" bytes\n",
-		cache, git_cache_size(cache), cache->used_memory);
-
-	git_oidmap_foreach_value(cache->map, object, {
-		char oid_str[9];
-		printf(" %s%c %s (%"PRIuZ")\n",
-			git_object_type2string(object->type),
-			object->flags == GIT_CACHE_STORE_PARSED ? '*' : ' ',
-			git_oid_tostr(oid_str, sizeof(oid_str), &object->oid),
-			object->size
-		);
-	});
-}
-
 int git_cache_init(git_cache *cache)
 {
 	memset(cache, 0, sizeof(*cache));
@@ -189,7 +168,7 @@ static void *cache_store(git_cache *cache, git_cached_obj *entry)
 		return entry;
 
 	/* soften the load on the cache */
-	if (git_cache__current_storage.val > git_cache__max_storage)
+	if (git_atomic_ssize_get(&git_cache__current_storage) > git_cache__max_storage)
 		cache_evict_entries(cache);
 
 	/* not found */
diff --git a/src/checkout.c b/src/checkout.c
index 5cfa7280b..94a2cb9fa 100644
--- a/src/checkout.c
+++ b/src/checkout.c
@@ -44,7 +44,6 @@ enum {
 	CHECKOUT_ACTION__REMOVE_CONFLICT = 16,
 	CHECKOUT_ACTION__UPDATE_CONFLICT = 32,
 	CHECKOUT_ACTION__MAX = 32,
-	CHECKOUT_ACTION__DEFER_REMOVE = 64,
 	CHECKOUT_ACTION__REMOVE_AND_UPDATE =
 		(CHECKOUT_ACTION__UPDATE_BLOB | CHECKOUT_ACTION__REMOVE),
 };
@@ -196,7 +195,7 @@ static bool checkout_is_workdir_modified(
 		}
 
 		if (git_submodule_status(&sm_status, data->repo, wditem->path, GIT_SUBMODULE_IGNORE_UNSPECIFIED) < 0 ||
-			GIT_SUBMODULE_STATUS_IS_WD_DIRTY(sm_status))
+		    GIT_SUBMODULE_STATUS_IS_WD_DIRTY(sm_status))
 			rval = true;
 		else if ((sm_oid = git_submodule_wd_id(sm)) == NULL)
 			rval = false;
@@ -217,9 +216,10 @@ static bool checkout_is_workdir_modified(
 	ie = git_index_get_bypath(data->index, wditem->path, 0);
 
 	if (ie != NULL &&
-		git_index_time_eq(&wditem->mtime, &ie->mtime) &&
-		wditem->file_size == ie->file_size &&
-		!is_filemode_changed(wditem->mode, ie->mode, data->respect_filemode)) {
+	    !git_index_entry_newer_than_index(ie, data->index) &&
+	    git_index_time_eq(&wditem->mtime, &ie->mtime) &&
+	    wditem->file_size == ie->file_size &&
+	    !is_filemode_changed(wditem->mode, ie->mode, data->respect_filemode)) {
 
 		/* The workdir is modified iff the index entry is modified */
 		return !is_workdir_base_or_new(&ie->id, baseitem, newitem) ||
@@ -273,9 +273,8 @@ static int checkout_action_common(
 
 		/* if the file is on disk and doesn't match our mode, force update */
 		if (wd &&
-			GIT_PERMS_IS_EXEC(wd->mode) !=
-			GIT_PERMS_IS_EXEC(delta->new_file.mode))
-				*action |= CHECKOUT_ACTION__REMOVE;
+		    GIT_PERMS_IS_EXEC(wd->mode) != GIT_PERMS_IS_EXEC(delta->new_file.mode))
+			*action |= CHECKOUT_ACTION__REMOVE;
 
 		notify = GIT_CHECKOUT_NOTIFY_UPDATED;
 	}
@@ -371,8 +370,13 @@ static int checkout_action_wd_only(
 	if (!git_pathspec__match(
 			pathspec, wd->path,
 			(data->strategy & GIT_CHECKOUT_DISABLE_PATHSPEC_MATCH) != 0,
-			git_iterator_ignore_case(workdir), NULL, NULL))
-		return git_iterator_advance(wditem, workdir);
+			git_iterator_ignore_case(workdir), NULL, NULL)) {
+
+		if (wd->mode == GIT_FILEMODE_TREE)
+			return git_iterator_advance_into(wditem, workdir);
+		else
+			return git_iterator_advance(wditem, workdir);
+	}
 
 	/* check if item is tracked in the index but not in the checkout diff */
 	if (data->index != NULL) {
@@ -794,13 +798,13 @@ static int checkout_conflictdata_cmp(const void *a, const void *b)
 	int diff;
 
 	if ((diff = checkout_idxentry_cmp(ca->ancestor, cb->ancestor)) == 0 &&
-		(diff = checkout_idxentry_cmp(ca->ours, cb->theirs)) == 0)
+	    (diff = checkout_idxentry_cmp(ca->ours, cb->theirs)) == 0)
 		diff = checkout_idxentry_cmp(ca->theirs, cb->theirs);
 
 	return diff;
 }
 
-int checkout_conflictdata_empty(
+static int checkout_conflictdata_empty(
 	const git_vector *conflicts, size_t idx, void *payload)
 {
 	checkout_conflictdata *conflict;
@@ -1173,7 +1177,7 @@ static int checkout_conflicts_mark_directoryfile(
 	/* Find d/f conflicts */
 	git_vector_foreach(&data->update_conflicts, i, conflict) {
 		if ((conflict->ours && conflict->theirs) ||
-			(!conflict->ours && !conflict->theirs))
+		    (!conflict->ours && !conflict->theirs))
 			continue;
 
 		path = conflict->ours ?
@@ -1222,8 +1226,8 @@ static int checkout_get_update_conflicts(
 		return 0;
 
 	if ((error = checkout_conflicts_load(data, workdir, pathspec)) < 0 ||
-		(error = checkout_conflicts_coalesce_renames(data)) < 0 ||
-		(error = checkout_conflicts_mark_directoryfile(data)) < 0)
+	    (error = checkout_conflicts_coalesce_renames(data)) < 0 ||
+	    (error = checkout_conflicts_mark_directoryfile(data)) < 0)
 		goto done;
 
 done:
@@ -1304,14 +1308,15 @@ static int checkout_get_actions(
 	size_t i, *counts = NULL;
 	uint32_t *actions = NULL;
 
-	git_pool_init(&pathpool, 1);
+	if (git_pool_init(&pathpool, 1) < 0)
+		return -1;
 
 	if (data->opts.paths.count > 0 &&
-		git_pathspec__vinit(&pathspec, &data->opts.paths, &pathpool) < 0)
+	    git_pathspec__vinit(&pathspec, &data->opts.paths, &pathpool) < 0)
 		return -1;
 
 	if ((error = git_iterator_current(&wditem, workdir)) < 0 &&
-		error != GIT_ITEROVER)
+	    error != GIT_ITEROVER)
 		goto fail;
 
 	deltas = &data->diff->deltas;
@@ -1350,8 +1355,7 @@ static int checkout_get_actions(
 	counts[CHECKOUT_ACTION__REMOVE] += data->removes.length;
 
 	if (counts[CHECKOUT_ACTION__CONFLICT] > 0 &&
-		(data->strategy & GIT_CHECKOUT_ALLOW_CONFLICTS) == 0)
-	{
+	    (data->strategy & GIT_CHECKOUT_ALLOW_CONFLICTS) == 0) {
 		git_error_set(GIT_ERROR_CHECKOUT, "%"PRIuZ" %s checkout",
 			counts[CHECKOUT_ACTION__CONFLICT],
 			counts[CHECKOUT_ACTION__CONFLICT] == 1 ?
@@ -1362,7 +1366,7 @@ static int checkout_get_actions(
 
 
 	if ((error = checkout_get_remove_conflicts(data, workdir, &pathspec)) < 0 ||
-		(error = checkout_get_update_conflicts(data, workdir, &pathspec)) < 0)
+	    (error = checkout_get_update_conflicts(data, workdir, &pathspec)) < 0)
 		goto fail;
 
 	counts[CHECKOUT_ACTION__REMOVE_CONFLICT] = git_vector_length(&data->remove_conflicts);
@@ -1853,26 +1857,6 @@ static int checkout_remove_the_old(
 	return 0;
 }
 
-static int checkout_deferred_remove(git_repository *repo, const char *path)
-{
-#if 0
-	int error = git_futils_rmdir_r(
-		path, data->opts.target_directory, GIT_RMDIR_EMPTY_PARENTS);
-
-	if (error == GIT_ENOTFOUND) {
-		error = 0;
-		git_error_clear();
-	}
-
-	return error;
-#else
-	GIT_UNUSED(repo);
-	GIT_UNUSED(path);
-	assert(false);
-	return 0;
-#endif
-}
-
 static int checkout_create_the_new(
 	unsigned int *actions,
 	checkout_data *data)
@@ -1882,15 +1866,6 @@ static int checkout_create_the_new(
 	size_t i;
 
 	git_vector_foreach(&data->diff->deltas, i, delta) {
-		if (actions[i] & CHECKOUT_ACTION__DEFER_REMOVE) {
-			/* this had a blocker directory that should only be removed iff
-			 * all of the contents of the directory were safely removed
-			 */
-			if ((error = checkout_deferred_remove(
-					data->repo, delta->old_file.path)) < 0)
-				return error;
-		}
-
 		if (actions[i] & CHECKOUT_ACTION__UPDATE_BLOB && !S_ISLNK(delta->new_file.mode)) {
 			if ((error = checkout_blob(data, &delta->new_file)) < 0)
 				return error;
@@ -1915,20 +1890,10 @@ static int checkout_create_submodules(
 	unsigned int *actions,
 	checkout_data *data)
 {
-	int error = 0;
 	git_diff_delta *delta;
 	size_t i;
 
 	git_vector_foreach(&data->diff->deltas, i, delta) {
-		if (actions[i] & CHECKOUT_ACTION__DEFER_REMOVE) {
-			/* this has a blocker directory that should only be removed iff
-			 * all of the contents of the directory were safely removed
-			 */
-			if ((error = checkout_deferred_remove(
-					data->repo, delta->old_file.path)) < 0)
-				return error;
-		}
-
 		if (actions[i] & CHECKOUT_ACTION__UPDATE_SUBMODULE) {
 			int error = checkout_submodule(data, &delta->new_file);
 			if (error < 0)
@@ -2520,9 +2485,8 @@ static int checkout_data_init(
 		git_config_entry_free(conflict_style);
 	}
 
-	git_pool_init(&data->pool, 1);
-
-	if ((error = git_vector_init(&data->removes, 0, git__strcmp_cb)) < 0 ||
+	if ((error = git_pool_init(&data->pool, 1)) < 0 ||
+	    (error = git_vector_init(&data->removes, 0, git__strcmp_cb)) < 0 ||
 	    (error = git_vector_init(&data->remove_conflicts, 0, NULL)) < 0 ||
 	    (error = git_vector_init(&data->update_conflicts, 0, NULL)) < 0 ||
 	    (error = git_buf_puts(&data->target_path, data->opts.target_directory)) < 0 ||
@@ -2544,6 +2508,17 @@ cleanup:
 #define CHECKOUT_INDEX_DONT_WRITE_MASK \
 	(GIT_CHECKOUT_DONT_UPDATE_INDEX | GIT_CHECKOUT_DONT_WRITE_INDEX)
 
+GIT_INLINE(void) setup_pathspecs(
+	git_iterator_options *iter_opts,
+	const git_checkout_options *checkout_opts)
+{
+	if (checkout_opts &&
+		(checkout_opts->checkout_strategy & GIT_CHECKOUT_DISABLE_PATHSPEC_MATCH)) {
+		iter_opts->pathlist.count = checkout_opts->paths.count;
+		iter_opts->pathlist.strings = checkout_opts->paths.strings;
+	}
+}
+
 int git_checkout_iterator(
 	git_iterator *target,
 	git_index *index,
@@ -2586,6 +2561,8 @@ int git_checkout_iterator(
 	workdir_opts.start = data.pfx;
 	workdir_opts.end = data.pfx;
 
+	setup_pathspecs(&workdir_opts, opts);
+
 	if ((error = git_iterator_reset_range(target, data.pfx, data.pfx)) < 0 ||
 		(error = git_iterator_for_workdir_ext(
 			&workdir, data.repo, data.opts.target_directory, index, NULL,
@@ -2596,10 +2573,8 @@ int git_checkout_iterator(
 		GIT_ITERATOR_IGNORE_CASE : GIT_ITERATOR_DONT_IGNORE_CASE;
 	baseline_opts.start = data.pfx;
 	baseline_opts.end = data.pfx;
-	if (opts && (opts->checkout_strategy & GIT_CHECKOUT_DISABLE_PATHSPEC_MATCH)) {
-		baseline_opts.pathlist.count = opts->paths.count;
-		baseline_opts.pathlist.strings = opts->paths.strings;
-	}
+
+	setup_pathspecs(&baseline_opts, opts);
 
 	if (data.opts.baseline_index) {
 		if ((error = git_iterator_for_index(
@@ -2689,6 +2664,7 @@ int git_checkout_index(
 	git_index *index,
 	const git_checkout_options *opts)
 {
+	git_iterator_options iter_opts = GIT_ITERATOR_OPTIONS_INIT;
 	int error, owned = 0;
 	git_iterator *index_i;
 
@@ -2716,7 +2692,9 @@ int git_checkout_index(
 		return error;
 	GIT_REFCOUNT_INC(index);
 
-	if (!(error = git_iterator_for_index(&index_i, repo, index, NULL)))
+	setup_pathspecs(&iter_opts, opts);
+
+	if (!(error = git_iterator_for_index(&index_i, repo, index, &iter_opts)))
 		error = git_checkout_iterator(index_i, index, opts);
 
 	if (owned)
@@ -2773,10 +2751,7 @@ int git_checkout_tree(
 	if ((error = git_repository_index(&index, repo)) < 0)
 		return error;
 
-	if (opts && (opts->checkout_strategy & GIT_CHECKOUT_DISABLE_PATHSPEC_MATCH)) {
-		iter_opts.pathlist.count = opts->paths.count;
-		iter_opts.pathlist.strings = opts->paths.strings;
-	}
+	setup_pathspecs(&iter_opts, opts);
 
 	if (!(error = git_iterator_for_tree(&tree_i, tree, &iter_opts)))
 		error = git_checkout_iterator(tree_i, index, opts);
@@ -2803,7 +2778,9 @@ int git_checkout_options_init(git_checkout_options *opts, unsigned int version)
 	return 0;
 }
 
+#ifndef GIT_DEPRECATE_HARD
 int git_checkout_init_options(git_checkout_options *opts, unsigned int version)
 {
 	return git_checkout_options_init(opts, version);
 }
+#endif
diff --git a/src/cherrypick.c b/src/cherrypick.c
index 640d11a7b..103897aae 100644
--- a/src/cherrypick.c
+++ b/src/cherrypick.c
@@ -229,8 +229,10 @@ int git_cherrypick_options_init(
 	return 0;
 }
 
+#ifndef GIT_DEPRECATE_HARD
 int git_cherrypick_init_options(
 	git_cherrypick_options *opts, unsigned int version)
 {
 	return git_cherrypick_options_init(opts, version);
 }
+#endif
diff --git a/src/clone.c b/src/clone.c
index 3d749c32f..a93ec475f 100644
--- a/src/clone.c
+++ b/src/clone.c
@@ -137,6 +137,80 @@ static int update_head_to_new_branch(
 	return error;
 }
 
+static int update_head_to_default(git_repository *repo)
+{
+	git_buf initialbranch = GIT_BUF_INIT;
+	const char *branch_name;
+	int error = 0;
+
+	if ((error = git_repository_initialbranch(&initialbranch, repo)) < 0)
+		goto done;
+
+	if (git__prefixcmp(initialbranch.ptr, GIT_REFS_HEADS_DIR) != 0) {
+		git_error_set(GIT_ERROR_INVALID, "invalid initial branch '%s'", initialbranch.ptr);
+		error = -1;
+		goto done;
+	}
+
+	branch_name = initialbranch.ptr + strlen(GIT_REFS_HEADS_DIR);
+
+	error = setup_tracking_config(repo, branch_name, GIT_REMOTE_ORIGIN,
+		initialbranch.ptr);
+
+done:
+	git_buf_dispose(&initialbranch);
+	return error;
+}
+
+static int update_remote_head(
+	git_repository *repo,
+	git_remote *remote,
+	git_buf *target,
+	const char *reflog_message)
+{
+	git_refspec *refspec;
+	git_reference *remote_head = NULL;
+	git_buf remote_head_name = GIT_BUF_INIT;
+	git_buf remote_branch_name = GIT_BUF_INIT;
+	int error;
+
+	/* Determine the remote tracking ref name from the local branch */
+	refspec = git_remote__matching_refspec(remote, git_buf_cstr(target));
+
+	if (refspec == NULL) {
+		git_error_set(GIT_ERROR_NET, "the remote's default branch does not fit the refspec configuration");
+		error = GIT_EINVALIDSPEC;
+		goto cleanup;
+	}
+
+	if ((error = git_refspec_transform(
+		&remote_branch_name,
+		refspec,
+		git_buf_cstr(target))) < 0)
+		goto cleanup;
+
+	if ((error = git_buf_printf(&remote_head_name,
+		"%s%s/%s",
+		GIT_REFS_REMOTES_DIR,
+		git_remote_name(remote),
+		GIT_HEAD_FILE)) < 0)
+		goto cleanup;
+
+	error = git_reference_symbolic_create(
+		&remote_head,
+		repo,
+		git_buf_cstr(&remote_head_name),
+		git_buf_cstr(&remote_branch_name),
+		true,
+		reflog_message);
+
+cleanup:
+	git_reference_free(remote_head);
+	git_buf_dispose(&remote_branch_name);
+	git_buf_dispose(&remote_head_name);
+	return error;
+}
+
 static int update_head_to_remote(
 		git_repository *repo,
 		git_remote *remote,
@@ -144,10 +218,8 @@ static int update_head_to_remote(
 {
 	int error = 0;
 	size_t refs_len;
-	git_refspec *refspec;
 	const git_remote_head *remote_head, **refs;
 	const git_oid *remote_head_id;
-	git_buf remote_master_name = GIT_BUF_INIT;
 	git_buf branch = GIT_BUF_INIT;
 
 	if ((error = git_remote_ls(&refs, &refs_len, remote)) < 0)
@@ -155,8 +227,7 @@ static int update_head_to_remote(
 
 	/* We cloned an empty repository or one with an unborn HEAD */
 	if (refs_len == 0 || strcmp(refs[0]->name, GIT_HEAD_FILE))
-		return setup_tracking_config(
-			repo, "master", GIT_REMOTE_ORIGIN, GIT_REFS_HEADS_MASTER_FILE);
+		return update_head_to_default(repo);
 
 	/* We know we have HEAD, let's see where it points */
 	remote_head = refs[0];
@@ -171,19 +242,7 @@ static int update_head_to_remote(
 		goto cleanup;
 	}
 
-	refspec = git_remote__matching_refspec(remote, git_buf_cstr(&branch));
-
-	if (refspec == NULL) {
-		git_error_set(GIT_ERROR_NET, "the remote's default branch does not fit the refspec configuration");
-		error = GIT_EINVALIDSPEC;
-		goto cleanup;
-	}
-
-	/* Determine the remote tracking reference name from the local master */
-	if ((error = git_refspec_transform(
-		&remote_master_name,
-		refspec,
-		git_buf_cstr(&branch))) < 0)
+	if ((error = update_remote_head(repo, remote, &branch, reflog_message)) < 0)
 		goto cleanup;
 
 	error = update_head_to_new_branch(
@@ -193,7 +252,6 @@ static int update_head_to_remote(
 		reflog_message);
 
 cleanup:
-	git_buf_dispose(&remote_master_name);
 	git_buf_dispose(&branch);
 
 	return error;
@@ -479,10 +537,12 @@ int git_clone_options_init(git_clone_options *opts, unsigned int version)
 	return 0;
 }
 
+#ifndef GIT_DEPRECATE_HARD
 int git_clone_init_options(git_clone_options *opts, unsigned int version)
 {
 	return git_clone_options_init(opts, version);
 }
+#endif
 
 static bool can_link(const char *src, const char *dst, int link)
 {
diff --git a/src/common.h b/src/common.h
index a4152caf2..2b1a4a456 100644
--- a/src/common.h
+++ b/src/common.h
@@ -80,6 +80,7 @@
 #include "errors.h"
 #include "thread-utils.h"
 #include "integer.h"
+#include "assert_safe.h"
 
 /*
  * Include the declarations for deprecated functions; this ensures
diff --git a/src/config.c b/src/config.c
index 8338da010..42f46e6cf 100644
--- a/src/config.c
+++ b/src/config.c
@@ -1000,7 +1000,7 @@ static int multivar_iter_next(git_config_entry **entry, git_config_iterator *_it
 	return error;
 }
 
-void multivar_iter_free(git_config_iterator *_iter)
+static void multivar_iter_free(git_config_iterator *_iter)
 {
 	multivar_iter *iter = (multivar_iter *) _iter;
 
@@ -1227,9 +1227,6 @@ int git_config_lookup_map_value(
 {
 	size_t i;
 
-	if (!value)
-		goto fail_parse;
-
 	for (i = 0; i < map_n; ++i) {
 		const git_configmap *m = maps + i;
 
@@ -1238,7 +1235,7 @@ int git_config_lookup_map_value(
 		case GIT_CONFIGMAP_TRUE: {
 			int bool_val;
 
-			if (git__parse_bool(&bool_val, value) == 0 &&
+			if (git_config_parse_bool(&bool_val, value) == 0 &&
 				bool_val == (int)m->type) {
 				*out = m->map_value;
 				return 0;
@@ -1252,7 +1249,7 @@ int git_config_lookup_map_value(
 			break;
 
 		case GIT_CONFIGMAP_STRING:
-			if (strcasecmp(value, m->str_match) == 0) {
+			if (value && strcasecmp(value, m->str_match) == 0) {
 				*out = m->map_value;
 				return 0;
 			}
@@ -1260,7 +1257,6 @@ int git_config_lookup_map_value(
 		}
 	}
 
-fail_parse:
 	git_error_set(GIT_ERROR_CONFIG, "failed to map '%s'", value);
 	return -1;
 }
diff --git a/src/config_entries.c b/src/config_entries.c
index 3ddd3369a..66aae096d 100644
--- a/src/config_entries.c
+++ b/src/config_entries.c
@@ -11,9 +11,13 @@ typedef struct config_entry_list {
 	struct config_entry_list *next;
 	struct config_entry_list *last;
 	git_config_entry *entry;
-	bool first;
 } config_entry_list;
 
+typedef struct {
+	git_config_entry *entry;
+	bool multivar;
+} config_entry_map_head;
+
 typedef struct config_entries_iterator {
 	git_config_iterator parent;
 	git_config_entries *entries;
@@ -102,14 +106,16 @@ void git_config_entries_incref(git_config_entries *entries)
 static void config_entries_free(git_config_entries *entries)
 {
 	config_entry_list *list = NULL, *next;
+	config_entry_map_head *head;
 
+	git_strmap_foreach_value(entries->map, head,
+		git__free((char *) head->entry->name); git__free(head)
+	);
 	git_strmap_free(entries->map);
 
 	list = entries->list;
 	while (list != NULL) {
 		next = list->next;
-		if (list->first)
-			git__free((char *) list->entry->name);
 		git__free((char *) list->entry->value);
 		git__free(list->entry);
 		git__free(list);
@@ -127,40 +133,42 @@ void git_config_entries_free(git_config_entries *entries)
 
 int git_config_entries_append(git_config_entries *entries, git_config_entry *entry)
 {
-	config_entry_list *existing, *head;
+	config_entry_list *list_head;
+	config_entry_map_head *map_head;
 
-	head = git__calloc(1, sizeof(config_entry_list));
-	GIT_ERROR_CHECK_ALLOC(head);
-	head->entry = entry;
-
-	/*
-	 * This is a micro-optimization for configuration files
-	 * with a lot of same keys. As for multivars the entry's
-	 * key will be the same for all entries, we can just free
-	 * all except the first entry's name and just re-use it.
-	 */
-	if ((existing = git_strmap_get(entries->map, entry->name)) != NULL) {
+	if ((map_head = git_strmap_get(entries->map, entry->name)) != NULL) {
+		map_head->multivar = true;
+		/*
+		 * This is a micro-optimization for configuration files
+		 * with a lot of same keys. As for multivars the entry's
+		 * key will be the same for all entries, we can just free
+		 * all except the first entry's name and just re-use it.
+		 */
 		git__free((char *) entry->name);
-		entry->name = existing->entry->name;
+		entry->name = map_head->entry->name;
 	} else {
-		head->first = 1;
+		map_head = git__calloc(1, sizeof(*map_head));
+		if ((git_strmap_set(entries->map, entry->name, map_head)) < 0)
+			return -1;
 	}
+	map_head->entry = entry;
+
+	list_head = git__calloc(1, sizeof(config_entry_list));
+	GIT_ERROR_CHECK_ALLOC(list_head);
+	list_head->entry = entry;
 
 	if (entries->list)
-		entries->list->last->next = head;
+		entries->list->last->next = list_head;
 	else
-		entries->list = head;
-	entries->list->last = head;
-
-	if (git_strmap_set(entries->map, entry->name, head) < 0)
-		return -1;
+		entries->list = list_head;
+	entries->list->last = list_head;
 
 	return 0;
 }
 
 int git_config_entries_get(git_config_entry **out, git_config_entries *entries, const char *key)
 {
-	config_entry_list *entry;
+	config_entry_map_head *entry;
 	if ((entry = git_strmap_get(entries->map, key)) == NULL)
 		return GIT_ENOTFOUND;
 	*out = entry->entry;
@@ -169,12 +177,12 @@ int git_config_entries_get(git_config_entry **out, git_config_entries *entries,
 
 int git_config_entries_get_unique(git_config_entry **out, git_config_entries *entries, const char *key)
 {
-	config_entry_list *entry;
+	config_entry_map_head *entry;
 
 	if ((entry = git_strmap_get(entries->map, key)) == NULL)
 		return GIT_ENOTFOUND;
 
-	if (!entry->first) {
+	if (entry->multivar) {
 		git_error_set(GIT_ERROR_CONFIG, "entry is not unique due to being a multivar");
 		return -1;
 	}
diff --git a/src/config_parse.c b/src/config_parse.c
index 48ad1164f..ed2c87f6b 100644
--- a/src/config_parse.c
+++ b/src/config_parse.c
@@ -451,7 +451,7 @@ static int parse_variable(git_config_parser *reader, char **var_name, char **var
 			git_buf_attach(&multi_value, value, 0);
 			value = NULL;
 
-			if (parse_multiline_variable(reader, &multi_value, quote_count) < 0 ||
+			if (parse_multiline_variable(reader, &multi_value, quote_count % 2) < 0 ||
 			    git_buf_oom(&multi_value)) {
 				error = -1;
 				git_buf_dispose(&multi_value);
diff --git a/src/config_snapshot.c b/src/config_snapshot.c
index 62b9068fb..e295d2f7f 100644
--- a/src/config_snapshot.c
+++ b/src/config_snapshot.c
@@ -5,8 +5,9 @@
  * a Linking Exception. For full terms see the included COPYING file.
  */
 
-#include "config.h"
+#include "config_backend.h"
 
+#include "config.h"
 #include "config_entries.h"
 
 typedef struct {
diff --git a/src/describe.c b/src/describe.c
index 42e5848c2..8beffdeba 100644
--- a/src/describe.c
+++ b/src/describe.c
@@ -685,7 +685,7 @@ int git_describe_commit(
 			get_name, &data)) < 0)
 				goto cleanup;
 
-	if (git_oidmap_size(data.names) == 0 && !opts->show_commit_oid_as_fallback) {
+	if (git_oidmap_size(data.names) == 0 && !normalized.show_commit_oid_as_fallback) {
 		git_error_set(GIT_ERROR_DESCRIBE, "cannot describe - "
 			"no reference found, cannot describe anything.");
 		error = -1;
@@ -876,10 +876,12 @@ int git_describe_options_init(git_describe_options *opts, unsigned int version)
 	return 0;
 }
 
+#ifndef GIT_DEPRECATE_HARD
 int git_describe_init_options(git_describe_options *opts, unsigned int version)
 {
 	return git_describe_options_init(opts, version);
 }
+#endif
 
 int git_describe_format_options_init(git_describe_format_options *opts, unsigned int version)
 {
@@ -888,7 +890,9 @@ int git_describe_format_options_init(git_describe_format_options *opts, unsigned
 	return 0;
 }
 
+#ifndef GIT_DEPRECATE_HARD
 int git_describe_init_format_options(git_describe_format_options *opts, unsigned int version)
 {
 	return git_describe_format_options_init(opts, version);
 }
+#endif
diff --git a/src/diff.c b/src/diff.c
index 47f49d949..3e52e3f18 100644
--- a/src/diff.c
+++ b/src/diff.c
@@ -32,11 +32,6 @@ GIT_INLINE(const char *) diff_delta__path(const git_diff_delta *delta)
 	return str;
 }
 
-const char *git_diff_delta__path(const git_diff_delta *delta)
-{
-	return diff_delta__path(delta);
-}
-
 int git_diff_delta__cmp(const void *a, const void *b)
 {
 	const git_diff_delta *da = a, *db = b;
@@ -155,7 +150,7 @@ int git_diff_foreach(
 	return error;
 }
 
-int git_diff_format_email__append_header_tobuf(
+static int diff_format_email_append_header_tobuf(
 	git_buf *out,
 	const git_oid *id,
 	const git_signature *author,
@@ -212,7 +207,7 @@ int git_diff_format_email__append_header_tobuf(
 	return error;
 }
 
-int git_diff_format_email__append_patches_tobuf(
+static int diff_format_email_append_patches_tobuf(
 	git_buf *out,
 	git_diff *diff)
 {
@@ -292,7 +287,7 @@ int git_diff_format_email(
 		strncpy(summary, opts->summary, offset);
 	}
 
-	error = git_diff_format_email__append_header_tobuf(out,
+	error = diff_format_email_append_header_tobuf(out,
 		opts->id, opts->author, summary == NULL ? opts->summary : summary,
 		opts->body, opts->patch_no, opts->total_patches, ignore_marker);
 
@@ -305,7 +300,7 @@ int git_diff_format_email(
 		(error = git_diff_get_stats(&stats, diff)) < 0 ||
 		(error = git_diff_stats_to_buf(out, stats, format_flags, 0)) < 0 ||
 		(error = git_buf_putc(out, '\n')) < 0 ||
-		(error = git_diff_format_email__append_patches_tobuf(out, diff)) < 0)
+		(error = diff_format_email_append_patches_tobuf(out, diff)) < 0)
 			goto on_error;
 
 	error = git_buf_puts(out, "--\nlibgit2 " LIBGIT2_VERSION "\n\n");
@@ -357,10 +352,12 @@ int git_diff_options_init(git_diff_options *opts, unsigned int version)
 	return 0;
 }
 
+#ifndef GIT_DEPRECATE_HARD
 int git_diff_init_options(git_diff_options *opts, unsigned int version)
 {
 	return git_diff_options_init(opts, version);
 }
+#endif
 
 int git_diff_find_options_init(
 	git_diff_find_options *opts, unsigned int version)
@@ -370,11 +367,13 @@ int git_diff_find_options_init(
 	return 0;
 }
 
+#ifndef GIT_DEPRECATE_HARD
 int git_diff_find_init_options(
 	git_diff_find_options *opts, unsigned int version)
 {
 	return git_diff_find_options_init(opts, version);
 }
+#endif
 
 int git_diff_format_email_options_init(
 	git_diff_format_email_options *opts, unsigned int version)
@@ -385,11 +384,13 @@ int git_diff_format_email_options_init(
 	return 0;
 }
 
+#ifndef GIT_DEPRECATE_HARD
 int git_diff_format_email_init_options(
 	git_diff_format_email_options *opts, unsigned int version)
 {
 	return git_diff_format_email_options_init(opts, version);
 }
+#endif
 
 static int flush_hunk(git_oid *result, git_hash_ctx *ctx)
 {
@@ -426,7 +427,7 @@ static void strip_spaces(git_buf *buf)
 	git_buf_truncate(buf, len);
 }
 
-int git_diff_patchid_print_callback__to_buf(
+static int diff_patchid_print_callback_to_buf(
 	const git_diff_delta *delta,
 	const git_diff_hunk *hunk,
 	const git_diff_line *line,
@@ -485,7 +486,7 @@ int git_diff_patchid(git_oid *out, git_diff *diff, git_diff_patchid_options *opt
 
 	if ((error = git_diff_print(diff,
 				    GIT_DIFF_FORMAT_PATCH_ID,
-				    git_diff_patchid_print_callback__to_buf,
+				    diff_patchid_print_callback_to_buf,
 				    &args)) < 0)
 		goto out;
 
diff --git a/src/diff_file.c b/src/diff_file.c
index 621bff556..015e0706b 100644
--- a/src/diff_file.c
+++ b/src/diff_file.c
@@ -160,8 +160,10 @@ int git_diff_file_content__init_from_src(
 
 			fc->flags |= GIT_DIFF_FLAG__FREE_BLOB;
 		} else {
+			int error;
+			if ((error = git_odb_hash(&fc->file->id, src->buf, src->buflen, GIT_OBJECT_BLOB)) < 0)
+				return error;
 			fc->file->size = src->buflen;
-			git_odb_hash(&fc->file->id, src->buf, src->buflen, GIT_OBJECT_BLOB);
 			fc->file->id_abbrev = GIT_OID_HEXSZ;
 
 			fc->map.len  = src->buflen;
diff --git a/src/diff_generate.c b/src/diff_generate.c
index b69ef3032..e7bfd6223 100644
--- a/src/diff_generate.c
+++ b/src/diff_generate.c
@@ -301,14 +301,14 @@ GIT_INLINE(const char *) diff_delta__i2w_path(const git_diff_delta *delta)
 		delta->old_file.path : delta->new_file.path;
 }
 
-int git_diff_delta__i2w_cmp(const void *a, const void *b)
+static int diff_delta_i2w_cmp(const void *a, const void *b)
 {
 	const git_diff_delta *da = a, *db = b;
 	int val = strcmp(diff_delta__i2w_path(da), diff_delta__i2w_path(db));
 	return val ? val : ((int)da->status - (int)db->status);
 }
 
-int git_diff_delta__i2w_casecmp(const void *a, const void *b)
+static int diff_delta_i2w_casecmp(const void *a, const void *b)
 {
 	const git_diff_delta *da = a, *db = b;
 	int val = strcasecmp(diff_delta__i2w_path(da), diff_delta__i2w_path(db));
@@ -361,7 +361,7 @@ static const char *diff_mnemonic_prefix(
 	return pfx;
 }
 
-void git_diff__set_ignore_case(git_diff *diff, bool ignore_case)
+static void diff_set_ignore_case(git_diff *diff, bool ignore_case)
 {
 	if (!ignore_case) {
 		diff->opts.flags &= ~GIT_DIFF_IGNORE_CASE;
@@ -423,16 +423,15 @@ static git_diff_generated *diff_generated_alloc(
 	git_attr_session__init(&diff->base.attrsession, repo);
 	memcpy(&diff->base.opts, &dflt, sizeof(git_diff_options));
 
-	git_pool_init(&diff->base.pool, 1);
-
-	if (git_vector_init(&diff->base.deltas, 0, git_diff_delta__cmp) < 0) {
+	if (git_pool_init(&diff->base.pool, 1) < 0 ||
+	    git_vector_init(&diff->base.deltas, 0, git_diff_delta__cmp) < 0) {
 		git_diff_free(&diff->base);
 		return NULL;
 	}
 
 	/* Use case-insensitive compare if either iterator has
 	 * the ignore_case bit set */
-	git_diff__set_ignore_case(
+	diff_set_ignore_case(
 		&diff->base,
 		git_iterator_ignore_case(old_iter) ||
 		git_iterator_ignore_case(new_iter));
@@ -1376,7 +1375,7 @@ int git_diff_tree_to_index(
 
 	/* if index is in case-insensitive order, re-sort deltas to match */
 	if (index_ignore_case)
-		git_diff__set_ignore_case(diff, true);
+		diff_set_ignore_case(diff, true);
 
 	*out = diff;
 	diff = NULL;
@@ -1527,7 +1526,7 @@ int git_diff_index_to_index(
 
 	/* if index is in case-insensitive order, re-sort deltas to match */
 	if (old_index->ignore_case || new_index->ignore_case)
-		git_diff__set_ignore_case(diff, true);
+		diff_set_ignore_case(diff, true);
 
 	*out = diff;
 	diff = NULL;
@@ -1584,10 +1583,10 @@ int git_diff__paired_foreach(
 	if (i2w_icase && !icase_mismatch) {
 		strcomp = git__strcasecmp;
 
-		git_vector_set_cmp(&idx2wd->deltas, git_diff_delta__i2w_casecmp);
+		git_vector_set_cmp(&idx2wd->deltas, diff_delta_i2w_casecmp);
 		git_vector_sort(&idx2wd->deltas);
 	} else if (idx2wd != NULL) {
-		git_vector_set_cmp(&idx2wd->deltas, git_diff_delta__i2w_cmp);
+		git_vector_set_cmp(&idx2wd->deltas, diff_delta_i2w_cmp);
 		git_vector_sort(&idx2wd->deltas);
 	}
 
diff --git a/src/diff_parse.c b/src/diff_parse.c
index 098e56f9a..75e41a544 100644
--- a/src/diff_parse.c
+++ b/src/diff_parse.c
@@ -52,9 +52,8 @@ static git_diff_parsed *diff_parsed_alloc(void)
 
 	diff->base.opts.flags &= ~GIT_DIFF_IGNORE_CASE;
 
-	git_pool_init(&diff->base.pool, 1);
-
-	if (git_vector_init(&diff->patches, 0, NULL) < 0 ||
+	if (git_pool_init(&diff->base.pool, 1) < 0 ||
+	    git_vector_init(&diff->patches, 0, NULL) < 0 ||
 		git_vector_init(&diff->base.deltas, 0, git_diff_delta__cmp) < 0) {
 		git_diff_free(&diff->base);
 		return NULL;
diff --git a/src/diff_print.c b/src/diff_print.c
index 369e5c1e6..9ce04d70e 100644
--- a/src/diff_print.c
+++ b/src/diff_print.c
@@ -337,7 +337,7 @@ static int diff_delta_format_with_paths(
 	return git_buf_printf(out, template, oldpath, newpath);
 }
 
-int diff_delta_format_similarity_header(
+static int diff_delta_format_similarity_header(
 	git_buf *out,
 	const git_diff_delta *delta)
 {
@@ -351,17 +351,16 @@ int diff_delta_format_similarity_header(
 		goto done;
 	}
 
+	GIT_ASSERT(delta->status == GIT_DELTA_RENAMED || delta->status == GIT_DELTA_COPIED);
 	if (delta->status == GIT_DELTA_RENAMED)
 		type = "rename";
-	else if (delta->status == GIT_DELTA_COPIED)
-		type = "copy";
 	else
-		abort();
+		type = "copy";
 
 	if ((error = git_buf_puts(&old_path, delta->old_file.path)) < 0 ||
-		(error = git_buf_puts(&new_path, delta->new_file.path)) < 0 ||
-		(error = git_buf_quote(&old_path)) < 0 ||
-		(error = git_buf_quote(&new_path)) < 0)
+	    (error = git_buf_puts(&new_path, delta->new_file.path)) < 0 ||
+	    (error = git_buf_quote(&old_path)) < 0 ||
+	    (error = git_buf_quote(&new_path)) < 0)
 		goto done;
 
 	git_buf_printf(out,
@@ -428,8 +427,11 @@ int git_diff_delta__format_file_header(
 	git_buf_printf(out, "diff --git %s %s\n",
 		old_path.ptr, new_path.ptr);
 
+	if (unchanged && delta->old_file.mode != delta->new_file.mode)
+		diff_print_modes(out, delta);
+
 	if (delta->status == GIT_DELTA_RENAMED ||
-		(delta->status == GIT_DELTA_COPIED && unchanged)) {
+	    (delta->status == GIT_DELTA_COPIED && unchanged)) {
 		if ((error = diff_delta_format_similarity_header(out, delta)) < 0)
 			goto done;
 	}
@@ -444,9 +446,6 @@ int git_diff_delta__format_file_header(
 				"--- %s\n+++ %s\n", old_path.ptr, new_path.ptr);
 	}
 
-	if (unchanged && delta->old_file.mode != delta->new_file.mode)
-		diff_print_modes(out, delta);
-
 	if (git_buf_oom(out))
 		error = -1;
 
@@ -492,6 +491,9 @@ static int format_binary(
 	}
 	git_buf_putc(pi->buf, '\n');
 
+	if (git_buf_oom(pi->buf))
+		return -1;
+
 	return 0;
 }
 
@@ -502,21 +504,17 @@ static int diff_print_patch_file_binary_noshow(
 	git_buf old_path = GIT_BUF_INIT, new_path = GIT_BUF_INIT;
 	int error;
 
-	if ((error = diff_delta_format_path(
-			&old_path, old_pfx, delta->old_file.path)) < 0 ||
-		(error = diff_delta_format_path(
-			&new_path, new_pfx, delta->new_file.path)) < 0)
+	if ((error = diff_delta_format_path(&old_path, old_pfx, delta->old_file.path)) < 0 ||
+	    (error = diff_delta_format_path(&new_path, new_pfx, delta->new_file.path)) < 0 ||
+	    (error = diff_delta_format_with_paths(pi->buf, delta, "Binary files %s and %s differ\n",
+						  old_path.ptr, new_path.ptr)) < 0)
 		goto done;
 
 	pi->line.num_lines = 1;
-	error = diff_delta_format_with_paths(
-		pi->buf, delta, "Binary files %s and %s differ\n",
-		old_path.ptr, new_path.ptr);
 
 done:
 	git_buf_dispose(&old_path);
 	git_buf_dispose(&new_path);
-
 	return error;
 }
 
@@ -540,10 +538,9 @@ static int diff_print_patch_file_binary(
 	pi->line.num_lines++;
 
 	if ((error = format_binary(pi, binary->new_file.type, binary->new_file.data,
-		binary->new_file.datalen, binary->new_file.inflatedlen)) < 0 ||
-		(error = format_binary(pi, binary->old_file.type, binary->old_file.data,
-			binary->old_file.datalen, binary->old_file.inflatedlen)) < 0) {
-
+				   binary->new_file.datalen, binary->new_file.inflatedlen)) < 0 ||
+	    (error = format_binary(pi, binary->old_file.type, binary->old_file.data,
+				   binary->old_file.datalen, binary->old_file.inflatedlen)) < 0) {
 		if (error == GIT_EBUFS) {
 			git_error_clear();
 			git_buf_truncate(pi->buf, pre_binary_size);
@@ -580,16 +577,15 @@ static int diff_print_patch_file(
 	GIT_UNUSED(progress);
 
 	if (S_ISDIR(delta->new_file.mode) ||
-		delta->status == GIT_DELTA_UNMODIFIED ||
-		delta->status == GIT_DELTA_IGNORED ||
-		delta->status == GIT_DELTA_UNREADABLE ||
-		(delta->status == GIT_DELTA_UNTRACKED &&
+	    delta->status == GIT_DELTA_UNMODIFIED ||
+	    delta->status == GIT_DELTA_IGNORED ||
+	    delta->status == GIT_DELTA_UNREADABLE ||
+	    (delta->status == GIT_DELTA_UNTRACKED &&
 		 (pi->flags & GIT_DIFF_SHOW_UNTRACKED_CONTENT) == 0))
 		return 0;
 
-	if ((error = git_diff_delta__format_file_header(
-			pi->buf, delta, oldpfx, newpfx,
-			id_strlen, print_index)) < 0)
+	if ((error = git_diff_delta__format_file_header(pi->buf, delta, oldpfx, newpfx,
+							id_strlen, print_index)) < 0)
 		return error;
 
 	pi->line.origin      = GIT_DIFF_LINE_FILE_HDR;
@@ -699,17 +695,16 @@ int git_diff_print(
 		return -1;
 	}
 
-	if (!(error = diff_print_info_init_fromdiff(
-			&pi, &buf, diff, format, print_cb, payload))) {
-		error = git_diff_foreach(
-			diff, print_file, print_binary, print_hunk, print_line, &pi);
+	if ((error = diff_print_info_init_fromdiff(&pi, &buf, diff, format, print_cb, payload)) < 0)
+		goto out;
 
-		if (error) /* make sure error message is set */
-			git_error_set_after_callback_function(error, "git_diff_print");
+	if ((error = git_diff_foreach(diff, print_file, print_binary, print_hunk, print_line, &pi)) != 0) {
+		git_error_set_after_callback_function(error, "git_diff_print");
+		goto out;
 	}
 
+out:
 	git_buf_dispose(&buf);
-
 	return error;
 }
 
@@ -728,8 +723,8 @@ int git_diff_print_callback__to_buf(
 	}
 
 	if (line->origin == GIT_DIFF_LINE_ADDITION ||
-		line->origin == GIT_DIFF_LINE_DELETION ||
-		line->origin == GIT_DIFF_LINE_CONTEXT)
+	    line->origin == GIT_DIFF_LINE_DELETION ||
+	    line->origin == GIT_DIFF_LINE_CONTEXT)
 		git_buf_putc(output, line->origin);
 
 	return git_buf_put(output, line->content, line->content_len);
@@ -742,14 +737,27 @@ int git_diff_print_callback__to_file_handle(
 	void *payload)
 {
 	FILE *fp = payload ? payload : stdout;
+	int error;
 
-	GIT_UNUSED(delta); GIT_UNUSED(hunk);
+	GIT_UNUSED(delta);
+	GIT_UNUSED(hunk);
 
 	if (line->origin == GIT_DIFF_LINE_CONTEXT ||
-		line->origin == GIT_DIFF_LINE_ADDITION ||
-		line->origin == GIT_DIFF_LINE_DELETION)
-		fputc(line->origin, fp);
-	fwrite(line->content, 1, line->content_len, fp);
+	    line->origin == GIT_DIFF_LINE_ADDITION ||
+	    line->origin == GIT_DIFF_LINE_DELETION) {
+		while ((error = fputc(line->origin, fp)) == EINTR)
+			continue;
+		if (error) {
+			git_error_set(GIT_ERROR_OS, "could not write status");
+			return -1;
+		}
+	}
+
+	if (fwrite(line->content, line->content_len, 1, fp) != 1) {
+		git_error_set(GIT_ERROR_OS, "could not write line");
+		return -1;
+	}
+
 	return 0;
 }
 
@@ -758,8 +766,7 @@ int git_diff_to_buf(git_buf *out, git_diff *diff, git_diff_format_t format)
 {
 	assert(out && diff);
 	git_buf_sanitize(out);
-	return git_diff_print(
-		diff, format, git_diff_print_callback__to_buf, out);
+	return git_diff_print(diff, format, git_diff_print_callback__to_buf, out);
 }
 
 /* print a git_patch to an output callback */
@@ -768,28 +775,24 @@ int git_patch_print(
 	git_diff_line_cb print_cb,
 	void *payload)
 {
-	int error;
 	git_buf temp = GIT_BUF_INIT;
 	diff_print_info pi;
+	int error;
 
 	assert(patch && print_cb);
 
-	if (!(error = diff_print_info_init_frompatch(
-		&pi, &temp, patch,
-		GIT_DIFF_FORMAT_PATCH, print_cb, payload)))
-	{
-		error = git_patch__invoke_callbacks(
-			patch,
-			diff_print_patch_file, diff_print_patch_binary,
-			diff_print_patch_hunk, diff_print_patch_line,
-			&pi);
+	if ((error = diff_print_info_init_frompatch(&pi, &temp, patch,
+						    GIT_DIFF_FORMAT_PATCH, print_cb, payload)) < 0)
+		goto out;
 
-		if (error) /* make sure error message is set */
-			git_error_set_after_callback_function(error, "git_patch_print");
+	if ((error = git_patch__invoke_callbacks(patch, diff_print_patch_file, diff_print_patch_binary,
+						 diff_print_patch_hunk, diff_print_patch_line, &pi)) < 0) {
+		git_error_set_after_callback_function(error, "git_patch_print");
+		goto out;
 	}
 
+out:
 	git_buf_dispose(&temp);
-
 	return error;
 }
 
diff --git a/src/diff_stats.c b/src/diff_stats.c
index 19c9da05f..f5fda7925 100644
--- a/src/diff_stats.c
+++ b/src/diff_stats.c
@@ -46,14 +46,14 @@ static int digits_for_value(size_t val)
 	return count;
 }
 
-int git_diff_file_stats__full_to_buf(
+static int diff_file_stats_full_to_buf(
 	git_buf *out,
 	const git_diff_delta *delta,
 	const diff_file_stats *filestat,
 	const git_diff_stats *stats,
 	size_t width)
 {
-	const char *old_path = NULL, *new_path = NULL;
+	const char *old_path = NULL, *new_path = NULL, *adddel_path = NULL;
 	size_t padding;
 	git_object_size_t old_size, new_size;
 
@@ -62,7 +62,7 @@ int git_diff_file_stats__full_to_buf(
 	old_size = delta->old_file.size;
 	new_size = delta->new_file.size;
 
-	if (strcmp(old_path, new_path) != 0) {
+	if (old_path && new_path && strcmp(old_path, new_path) != 0) {
 		size_t common_dirlen;
 		int error;
 
@@ -82,10 +82,11 @@ int git_diff_file_stats__full_to_buf(
 		if (error < 0)
 			goto on_error;
 	} else {
-		if (git_buf_printf(out, " %s", old_path) < 0)
+		adddel_path = new_path ? new_path : old_path;
+		if (git_buf_printf(out, " %s", adddel_path) < 0)
 			goto on_error;
 
-		padding = stats->max_name - strlen(old_path);
+		padding = stats->max_name - strlen(adddel_path);
 
 		if (stats->renames > 0)
 			padding += strlen(DIFF_RENAME_FILE_SEPARATOR);
@@ -134,7 +135,7 @@ on_error:
 	return (git_buf_oom(out) ? -1 : 0);
 }
 
-int git_diff_file_stats__number_to_buf(
+static int diff_file_stats_number_to_buf(
 	git_buf *out,
 	const git_diff_delta *delta,
 	const diff_file_stats *filestats)
@@ -151,7 +152,7 @@ int git_diff_file_stats__number_to_buf(
 	return error;
 }
 
-int git_diff_file_stats__summary_to_buf(
+static int diff_file_stats_summary_to_buf(
 	git_buf *out,
 	const git_diff_delta *delta)
 {
@@ -211,7 +212,7 @@ int git_diff_get_stats(
 
 		/* TODO ugh */
 		namelen = strlen(delta->new_file.path);
-		if (strcmp(delta->old_file.path, delta->new_file.path) != 0) {
+		if (delta->old_file.path && strcmp(delta->old_file.path, delta->new_file.path) != 0) {
 			namelen += strlen(delta->old_file.path);
 			stats->renames++;
 		}
@@ -288,7 +289,7 @@ int git_diff_stats_to_buf(
 			if ((delta = git_diff_get_delta(stats->diff, i)) == NULL)
 				continue;
 
-			error = git_diff_file_stats__number_to_buf(
+			error = diff_file_stats_number_to_buf(
 				out, delta, &stats->filestats[i]);
 			if (error < 0)
 				return error;
@@ -309,7 +310,7 @@ int git_diff_stats_to_buf(
 			if ((delta = git_diff_get_delta(stats->diff, i)) == NULL)
 				continue;
 
-			error = git_diff_file_stats__full_to_buf(
+			error = diff_file_stats_full_to_buf(
 				out, delta, &stats->filestats[i], stats, width);
 			if (error < 0)
 				return error;
@@ -342,7 +343,7 @@ int git_diff_stats_to_buf(
 			if ((delta = git_diff_get_delta(stats->diff, i)) == NULL)
 				continue;
 
-			error = git_diff_file_stats__summary_to_buf(out, delta);
+			error = diff_file_stats_summary_to_buf(out, delta);
 			if (error < 0)
 				return error;
 		}
diff --git a/src/diff_tform.c b/src/diff_tform.c
index 437144ae2..7de88bd0d 100644
--- a/src/diff_tform.c
+++ b/src/diff_tform.c
@@ -136,11 +136,10 @@ int git_diff__merge(
 		return -1;
 	}
 
-	if (git_vector_init(&onto_new, onto->deltas.length, git_diff_delta__cmp) < 0)
+	if (git_vector_init(&onto_new, onto->deltas.length, git_diff_delta__cmp) < 0 ||
+	    git_pool_init(&onto_pool, 1) < 0)
 		return -1;
 
-	git_pool_init(&onto_pool, 1);
-
 	for (i = 0, j = 0; i < onto->deltas.length || j < from->deltas.length; ) {
 		git_diff_delta *o = GIT_VECTOR_GET(&onto->deltas, i);
 		const git_diff_delta *f = GIT_VECTOR_GET(&from->deltas, j);
diff --git a/src/errors.c b/src/errors.c
index b34aa3abb..8570226b4 100644
--- a/src/errors.c
+++ b/src/errors.c
@@ -210,6 +210,7 @@ void git_error_system_set(int code)
 
 /* Deprecated error values and functions */
 
+#ifndef GIT_DEPRECATE_HARD
 const git_error *giterr_last(void)
 {
 	return git_error_last();
@@ -229,3 +230,4 @@ void giterr_set_oom(void)
 {
 	git_error_set_oom();
 }
+#endif
diff --git a/src/fetch.c b/src/fetch.c
index f2f313192..f4a4c9f81 100644
--- a/src/fetch.c
+++ b/src/fetch.c
@@ -155,7 +155,9 @@ int git_fetch_options_init(git_fetch_options *opts, unsigned int version)
 	return 0;
 }
 
+#ifndef GIT_DEPRECATE_HARD
 int git_fetch_init_options(git_fetch_options *opts, unsigned int version)
 {
 	return git_fetch_options_init(opts, version);
 }
+#endif
diff --git a/src/filter.c b/src/filter.c
index bb9d66ad6..09b57dc80 100644
--- a/src/filter.c
+++ b/src/filter.c
@@ -941,7 +941,7 @@ out:
 	return error;
 }
 
-void stream_list_free(git_vector *streams)
+static void filter_streams_free(git_vector *streams)
 {
 	git_writestream *stream;
 	size_t i;
@@ -990,7 +990,7 @@ done:
 
 	if (fd >= 0)
 		p_close(fd);
-	stream_list_free(&filter_streams);
+	filter_streams_free(&filter_streams);
 	git_buf_dispose(&abspath);
 	return error;
 }
@@ -1018,7 +1018,7 @@ out:
 	if (initialized)
 		error |= stream_start->close(stream_start);
 
-	stream_list_free(&filter_streams);
+	filter_streams_free(&filter_streams);
 	return error;
 }
 
diff --git a/src/futils.c b/src/futils.c
index a7c360a1c..8c0f008b3 100644
--- a/src/futils.c
+++ b/src/futils.c
@@ -834,12 +834,12 @@ int git_futils_rmdir_r(
 	return error;
 }
 
-int git_futils_fake_symlink(const char *old, const char *new)
+int git_futils_fake_symlink(const char *target, const char *path)
 {
 	int retcode = GIT_ERROR;
-	int fd = git_futils_creat_withpath(new, 0755, 0644);
+	int fd = git_futils_creat_withpath(path, 0755, 0644);
 	if (fd >= 0) {
-		retcode = p_write(fd, old, strlen(old));
+		retcode = p_write(fd, target, strlen(target));
 		p_close(fd);
 	}
 	return retcode;
diff --git a/src/futils.h b/src/futils.h
index 3d5664679..4668d7b63 100644
--- a/src/futils.h
+++ b/src/futils.h
@@ -316,11 +316,11 @@ extern void git_futils_mmap_free(git_map *map);
 /**
  * Create a "fake" symlink (text file containing the target path).
  *
- * @param new symlink file to be created
- * @param old original symlink target
+ * @param target original symlink target
+ * @param path symlink file to be created
  * @return 0 on success, -1 on error
  */
-extern int git_futils_fake_symlink(const char *new, const char *old);
+extern int git_futils_fake_symlink(const char *target, const char *path);
 
 /**
  * A file stamp represents a snapshot of information about a file that can
diff --git a/src/global.c b/src/global.c
index 5af35aa62..9fe8cd5d3 100644
--- a/src/global.c
+++ b/src/global.c
@@ -12,6 +12,7 @@
 #include "sysdir.h"
 #include "filter.h"
 #include "merge_driver.h"
+#include "pool.h"
 #include "streams/registry.h"
 #include "streams/mbedtls.h"
 #include "streams/openssl.h"
@@ -38,7 +39,8 @@ static git_global_init_fn git__init_callbacks[] = {
 	git_stream_registry_global_init,
 	git_openssl_stream_global_init,
 	git_mbedtls_stream_global_init,
-	git_mwindow_global_init
+	git_mwindow_global_init,
+	git_pool_global_init
 };
 
 static git_global_shutdown_fn git__shutdown_callbacks[ARRAY_SIZE(git__init_callbacks)];
diff --git a/src/idxmap.c b/src/idxmap.c
index 4dcf963b3..bc23608f2 100644
--- a/src/idxmap.c
+++ b/src/idxmap.c
@@ -138,28 +138,6 @@ void *git_idxmap_icase_get(git_idxmap_icase *map, const git_index_entry *key)
 	return kh_val(map, idx);
 }
 
-void git_idxmap_insert(git_idxmap *map, const git_index_entry *key, void *value, int *rval)
-{
-	khiter_t idx = kh_put(idx, map, key, rval);
-
-	if ((*rval) >= 0) {
-		if ((*rval) == 0)
-			kh_key(map, idx) = key;
-		kh_val(map, idx) = value;
-	}
-}
-
-void git_idxmap_icase_insert(git_idxmap_icase *map, const git_index_entry *key, void *value, int *rval)
-{
-	khiter_t idx = kh_put(idxicase, map, key, rval);
-
-	if ((*rval) >= 0) {
-		if ((*rval) == 0)
-			kh_key(map, idx) = key;
-		kh_val(map, idx) = value;
-	}
-}
-
 int git_idxmap_delete(git_idxmap *map, const git_index_entry *key)
 {
 	khiter_t idx = kh_get(idx, map, key);
diff --git a/src/index.c b/src/index.c
index 36a8bdb7b..d5afc9bb6 100644
--- a/src/index.c
+++ b/src/index.c
@@ -411,7 +411,8 @@ int git_index_open(git_index **index_out, const char *index_path)
 	index = git__calloc(1, sizeof(git_index));
 	GIT_ERROR_CHECK_ALLOC(index);
 
-	git_pool_init(&index->tree_pool, 1);
+	if (git_pool_init(&index->tree_pool, 1) < 0)
+		goto fail;
 
 	if (index_path != NULL) {
 		index->index_file_path = git__strdup(index_path);
@@ -2780,17 +2781,19 @@ static int write_disk_entry(git_filebuf *file, git_index_entry *entry, const cha
 	ondisk.flags = htons(entry->flags);
 
 	if (entry->flags & GIT_INDEX_ENTRY_EXTENDED) {
+		const size_t path_offset = offsetof(struct entry_long, path);
 		struct entry_long ondisk_ext;
 		memcpy(&ondisk_ext, &ondisk, sizeof(struct entry_short));
 		ondisk_ext.flags_extended = htons(entry->flags_extended &
 			GIT_INDEX_ENTRY_EXTENDED_FLAGS);
-		memcpy(mem, &ondisk_ext, offsetof(struct entry_long, path));
-		path = ((struct entry_long*)mem)->path;
-		disk_size -= offsetof(struct entry_long, path);
+		memcpy(mem, &ondisk_ext, path_offset);
+		path = (char *)mem + path_offset;
+		disk_size -= path_offset;
 	} else {
-		memcpy(mem, &ondisk, offsetof(struct entry_short, path));
-		path = ((struct entry_short*)mem)->path;
-		disk_size -= offsetof(struct entry_short, path);
+		const size_t path_offset = offsetof(struct entry_short, path);
+		memcpy(mem, &ondisk, path_offset);
+		path = (char *)mem + path_offset;
+		disk_size -= path_offset;
 	}
 
 	if (last) {
@@ -3716,9 +3719,11 @@ void git_indexwriter_cleanup(git_indexwriter *writer)
 
 /* Deprecated functions */
 
+#ifndef GIT_DEPRECATE_HARD
 int git_index_add_frombuffer(
     git_index *index, const git_index_entry *source_entry,
     const void *buffer, size_t len)
 {
 	return git_index_add_from_buffer(index, source_entry, buffer, len);
 }
+#endif
diff --git a/src/indexer.c b/src/indexer.c
index 68fdd85c5..8c74f0e72 100644
--- a/src/indexer.c
+++ b/src/indexer.c
@@ -123,10 +123,12 @@ int git_indexer_options_init(git_indexer_options *opts, unsigned int version)
 	return 0;
 }
 
+#ifndef GIT_DEPRECATE_HARD
 int git_indexer_init_options(git_indexer_options *opts, unsigned int version)
 {
 	return git_indexer_options_init(opts, version);
 }
+#endif
 
 int git_indexer_new(
 		git_indexer **out,
@@ -265,10 +267,11 @@ static int advance_delta_offset(git_indexer *idx, git_object_t type)
 	if (type == GIT_OBJECT_REF_DELTA) {
 		idx->off += GIT_OID_RAWSZ;
 	} else {
-		off64_t base_off = get_delta_base(idx->pack, &w, &idx->off, type, idx->entry_start);
+		off64_t base_off;
+		int error = get_delta_base(&base_off, idx->pack, &w, &idx->off, type, idx->entry_start);
 		git_mwindow_close(&w);
-		if (base_off < 0)
-			return (int)base_off;
+		if (error < 0)
+			return error;
 	}
 
 	return 0;
@@ -424,7 +427,10 @@ static int store_object(git_indexer *idx)
 	pentry = git__calloc(1, sizeof(struct git_pack_entry));
 	GIT_ERROR_CHECK_ALLOC(pentry);
 
-	git_hash_final(&oid, &idx->hash_ctx);
+	if (git_hash_final(&oid, &idx->hash_ctx)) {
+		git__free(pentry);
+		goto on_error;
+	}
 	entry_size = idx->off - entry_start;
 	if (entry_start > UINT31_MAX) {
 		entry->offset = UINT32_MAX;
diff --git a/src/iterator.c b/src/iterator.c
index e26e2c0c7..a393187c0 100644
--- a/src/iterator.c
+++ b/src/iterator.c
@@ -897,9 +897,8 @@ static int tree_iterator_init(tree_iterator *iter)
 {
 	int error;
 
-	git_pool_init(&iter->entry_pool, sizeof(tree_iterator_entry));
-
-	if ((error = tree_iterator_frame_init(iter, iter->root, NULL)) < 0)
+	if ((error = git_pool_init(&iter->entry_pool, sizeof(tree_iterator_entry))) < 0 ||
+	    (error = tree_iterator_frame_init(iter, iter->root, NULL)) < 0)
 		return error;
 
 	iter->base.flags &= ~GIT_ITERATOR_FIRST_ACCESS;
@@ -1376,7 +1375,8 @@ static int filesystem_iterator_frame_push(
 			filesystem_iterator_entry_cmp)) < 0)
 		goto done;
 
-	git_pool_init(&new_frame->entry_pool, 1);
+	if ((error = git_pool_init(&new_frame->entry_pool, 1)) < 0)
+		goto done;
 
 	/* check if this directory is ignored */
 	filesystem_iterator_frame_push_ignores(iter, frame_entry, new_frame);
diff --git a/src/merge.c b/src/merge.c
index afe69e564..2f6bf6fe7 100644
--- a/src/merge.c
+++ b/src/merge.c
@@ -80,7 +80,7 @@ static int cache_invalid_marker;
 
 /* Merge base computation */
 
-int merge_bases_many(git_commit_list **out, git_revwalk **walk_out, git_repository *repo, size_t length, const git_oid input_array[])
+static int merge_bases_many(git_commit_list **out, git_revwalk **walk_out, git_repository *repo, size_t length, const git_oid input_array[])
 {
 	git_revwalk *walk = NULL;
 	git_vector list;
@@ -1810,12 +1810,12 @@ git_merge_diff_list *git_merge_diff_list__alloc(git_repository *repo)
 
 	diff_list->repo = repo;
 
-	git_pool_init(&diff_list->pool, 1);
 
-	if (git_vector_init(&diff_list->staged, 0, NULL) < 0 ||
-		git_vector_init(&diff_list->conflicts, 0, NULL) < 0 ||
-		git_vector_init(&diff_list->resolved, 0, NULL) < 0) {
-		git_merge_diff_list__free(diff_list);
+	if (git_pool_init(&diff_list->pool, 1) < 0 ||
+	    git_vector_init(&diff_list->staged, 0, NULL) < 0 ||
+	    git_vector_init(&diff_list->conflicts, 0, NULL) < 0 ||
+	    git_vector_init(&diff_list->resolved, 0, NULL) < 0) {
+	    git_merge_diff_list__free(diff_list);
 		return NULL;
 	}
 
@@ -2845,7 +2845,7 @@ on_error:
 	return error;
 }
 
-const char *merge_their_label(const char *branchname)
+static const char *merge_their_label(const char *branchname)
 {
 	const char *slash;
 
@@ -3351,10 +3351,12 @@ int git_merge_options_init(git_merge_options *opts, unsigned int version)
 	return 0;
 }
 
+#ifndef GIT_DEPRECATE_HARD
 int git_merge_init_options(git_merge_options *opts, unsigned int version)
 {
 	return git_merge_options_init(opts, version);
 }
+#endif
 
 int git_merge_file_input_init(git_merge_file_input *input, unsigned int version)
 {
@@ -3363,10 +3365,12 @@ int git_merge_file_input_init(git_merge_file_input *input, unsigned int version)
 	return 0;
 }
 
+#ifndef GIT_DEPRECATE_HARD
 int git_merge_file_init_input(git_merge_file_input *input, unsigned int version)
 {
 	return git_merge_file_input_init(input, version);
 }
+#endif
 
 int git_merge_file_options_init(
 	git_merge_file_options *opts, unsigned int version)
@@ -3376,8 +3380,10 @@ int git_merge_file_options_init(
 	return 0;
 }
 
+#ifndef GIT_DEPRECATE_HARD
 int git_merge_file_init_options(
 	git_merge_file_options *opts, unsigned int version)
 {
 	return git_merge_file_options_init(opts, version);
 }
+#endif
diff --git a/src/merge_file.c b/src/merge_file.c
index 23daa84c4..755340fa9 100644
--- a/src/merge_file.c
+++ b/src/merge_file.c
@@ -28,7 +28,7 @@
 
 #define GIT_MERGE_FILE_SIDE_EXISTS(X)	((X)->mode != 0)
 
-int git_merge_file__input_from_index(
+static int merge_file_input_from_index(
 	git_merge_file_input *input_out,
 	git_odb_object **odb_object_out,
 	git_odb *odb,
@@ -276,17 +276,15 @@ int git_merge_file_from_index(
 		goto done;
 
 	if (ancestor) {
-		if ((error = git_merge_file__input_from_index(
+		if ((error = merge_file_input_from_index(
 			&ancestor_input, &odb_object[0], odb, ancestor)) < 0)
 			goto done;
 
 		ancestor_ptr = &ancestor_input;
 	}
 
-	if ((error = git_merge_file__input_from_index(
-			&our_input, &odb_object[1], odb, ours)) < 0 ||
-		(error = git_merge_file__input_from_index(
-			&their_input, &odb_object[2], odb, theirs)) < 0)
+	if ((error = merge_file_input_from_index(&our_input, &odb_object[1], odb, ours)) < 0 ||
+	    (error = merge_file_input_from_index(&their_input, &odb_object[2], odb, theirs)) < 0)
 		goto done;
 
 	error = merge_file__from_inputs(out,
diff --git a/src/midx.c b/src/midx.c
new file mode 100644
index 000000000..21cfff497
--- /dev/null
+++ b/src/midx.c
@@ -0,0 +1,418 @@
+/*
+ * Copyright (C) the libgit2 contributors. All rights reserved.
+ *
+ * This file is part of libgit2, distributed under the GNU GPL v2 with
+ * a Linking Exception. For full terms see the included COPYING file.
+ */
+
+#include "midx.h"
+
+#include "buffer.h"
+#include "futils.h"
+#include "hash.h"
+#include "odb.h"
+#include "pack.h"
+
+#define GIT_MIDX_FILE_MODE 0444
+
+#define MIDX_SIGNATURE 0x4d494458 /* "MIDX" */
+#define MIDX_VERSION 1
+#define MIDX_OBJECT_ID_VERSION 1
+struct git_midx_header {
+	uint32_t signature;
+	uint8_t version;
+	uint8_t object_id_version;
+	uint8_t chunks;
+	uint8_t base_midx_files;
+	uint32_t packfiles;
+};
+
+#define MIDX_PACKFILE_NAMES_ID 0x504e414d	   /* "PNAM" */
+#define MIDX_OID_FANOUT_ID 0x4f494446	   /* "OIDF" */
+#define MIDX_OID_LOOKUP_ID 0x4f49444c	   /* "OIDL" */
+#define MIDX_OBJECT_OFFSETS_ID 0x4f4f4646	   /* "OOFF" */
+#define MIDX_OBJECT_LARGE_OFFSETS_ID 0x4c4f4646 /* "LOFF" */
+
+struct git_midx_chunk {
+	off64_t offset;
+	size_t length;
+};
+
+static int midx_error(const char *message)
+{
+	git_error_set(GIT_ERROR_ODB, "invalid multi-pack-index file - %s", message);
+	return -1;
+}
+
+static int midx_parse_packfile_names(
+		git_midx_file *idx,
+		const unsigned char *data,
+		uint32_t packfiles,
+		struct git_midx_chunk *chunk)
+{
+	int error;
+	uint32_t i;
+	char *packfile_name = (char *)(data + chunk->offset);
+	size_t chunk_size = chunk->length, len;
+	if (chunk->offset == 0)
+		return midx_error("missing Packfile Names chunk");
+	if (chunk->length == 0)
+		return midx_error("empty Packfile Names chunk");
+	if ((error = git_vector_init(&idx->packfile_names, packfiles, git__strcmp_cb)) < 0)
+		return error;
+	for (i = 0; i < packfiles; ++i) {
+		len = p_strnlen(packfile_name, chunk_size);
+		if (len == 0)
+			return midx_error("empty packfile name");
+		if (len + 1 > chunk_size)
+			return midx_error("unterminated packfile name");
+		git_vector_insert(&idx->packfile_names, packfile_name);
+		if (i && strcmp(git_vector_get(&idx->packfile_names, i - 1), packfile_name) >= 0)
+			return midx_error("packfile names are not sorted");
+		if (strlen(packfile_name) <= strlen(".idx") || git__suffixcmp(packfile_name, ".idx") != 0)
+			return midx_error("non-.idx packfile name");
+		if (strchr(packfile_name, '/') != NULL || strchr(packfile_name, '\\') != NULL)
+			return midx_error("non-local packfile");
+		packfile_name += len + 1;
+		chunk_size -= len + 1;
+	}
+	return 0;
+}
+
+static int midx_parse_oid_fanout(
+		git_midx_file *idx,
+		const unsigned char *data,
+		struct git_midx_chunk *chunk_oid_fanout)
+{
+	uint32_t i, nr;
+	if (chunk_oid_fanout->offset == 0)
+		return midx_error("missing OID Fanout chunk");
+	if (chunk_oid_fanout->length == 0)
+		return midx_error("empty OID Fanout chunk");
+	if (chunk_oid_fanout->length != 256 * 4)
+		return midx_error("OID Fanout chunk has wrong length");
+
+	idx->oid_fanout = (const uint32_t *)(data + chunk_oid_fanout->offset);
+	nr = 0;
+	for (i = 0; i < 256; ++i) {
+		uint32_t n = ntohl(idx->oid_fanout[i]);
+		if (n < nr)
+			return midx_error("index is non-monotonic");
+		nr = n;
+	}
+	idx->num_objects = nr;
+	return 0;
+}
+
+static int midx_parse_oid_lookup(
+		git_midx_file *idx,
+		const unsigned char *data,
+		struct git_midx_chunk *chunk_oid_lookup)
+{
+	uint32_t i;
+	git_oid *oid, *prev_oid, zero_oid = {{0}};
+
+	if (chunk_oid_lookup->offset == 0)
+		return midx_error("missing OID Lookup chunk");
+	if (chunk_oid_lookup->length == 0)
+		return midx_error("empty OID Lookup chunk");
+	if (chunk_oid_lookup->length != idx->num_objects * 20)
+		return midx_error("OID Lookup chunk has wrong length");
+
+	idx->oid_lookup = oid = (git_oid *)(data + chunk_oid_lookup->offset);
+	prev_oid = &zero_oid;
+	for (i = 0; i < idx->num_objects; ++i, ++oid) {
+		if (git_oid_cmp(prev_oid, oid) >= 0)
+			return midx_error("OID Lookup index is non-monotonic");
+		prev_oid = oid;
+	}
+
+	return 0;
+}
+
+static int midx_parse_object_offsets(
+		git_midx_file *idx,
+		const unsigned char *data,
+		struct git_midx_chunk *chunk_object_offsets)
+{
+	if (chunk_object_offsets->offset == 0)
+		return midx_error("missing Object Offsets chunk");
+	if (chunk_object_offsets->length == 0)
+		return midx_error("empty Object Offsets chunk");
+	if (chunk_object_offsets->length != idx->num_objects * 8)
+		return midx_error("Object Offsets chunk has wrong length");
+
+	idx->object_offsets = data + chunk_object_offsets->offset;
+
+	return 0;
+}
+
+static int midx_parse_object_large_offsets(
+		git_midx_file *idx,
+		const unsigned char *data,
+		struct git_midx_chunk *chunk_object_large_offsets)
+{
+	if (chunk_object_large_offsets->length == 0)
+		return 0;
+	if (chunk_object_large_offsets->length % 8 != 0)
+		return midx_error("malformed Object Large Offsets chunk");
+
+	idx->object_large_offsets = data + chunk_object_large_offsets->offset;
+	idx->num_object_large_offsets = chunk_object_large_offsets->length / 8;
+
+	return 0;
+}
+
+int git_midx_parse(
+		git_midx_file *idx,
+		const unsigned char *data,
+		size_t size)
+{
+	struct git_midx_header *hdr;
+	const unsigned char *chunk_hdr;
+	struct git_midx_chunk *last_chunk;
+	uint32_t i;
+	off64_t last_chunk_offset, chunk_offset, trailer_offset;
+	git_oid idx_checksum = {{0}};
+	int error;
+	struct git_midx_chunk chunk_packfile_names = {0},
+					 chunk_oid_fanout = {0},
+					 chunk_oid_lookup = {0},
+					 chunk_object_offsets = {0},
+					 chunk_object_large_offsets = {0};
+
+	assert(idx);
+
+	if (size < sizeof(struct git_midx_header) + 20)
+		return midx_error("multi-pack index is too short");
+
+	hdr = ((struct git_midx_header *)data);
+
+	if (hdr->signature != htonl(MIDX_SIGNATURE) ||
+	    hdr->version != MIDX_VERSION ||
+	    hdr->object_id_version != MIDX_OBJECT_ID_VERSION) {
+		return midx_error("unsupported multi-pack index version");
+	}
+	if (hdr->chunks == 0)
+		return midx_error("no chunks in multi-pack index");
+
+	/*
+	 * The very first chunk's offset should be after the header, all the chunk
+	 * headers, and a special zero chunk.
+	 */
+	last_chunk_offset =
+			sizeof(struct git_midx_header) +
+			(1 + hdr->chunks) * 12;
+	trailer_offset = size - 20;
+	if (trailer_offset < last_chunk_offset)
+		return midx_error("wrong index size");
+	git_oid_cpy(&idx->checksum, (git_oid *)(data + trailer_offset));
+
+	if (git_hash_buf(&idx_checksum, data, (size_t)trailer_offset) < 0)
+		return midx_error("could not calculate signature");
+	if (!git_oid_equal(&idx_checksum, &idx->checksum))
+		return midx_error("index signature mismatch");
+
+	chunk_hdr = data + sizeof(struct git_midx_header);
+	last_chunk = NULL;
+	for (i = 0; i < hdr->chunks; ++i, chunk_hdr += 12) {
+		chunk_offset = ((off64_t)ntohl(*((uint32_t *)(chunk_hdr + 4)))) << 32 |
+				((off64_t)ntohl(*((uint32_t *)(chunk_hdr + 8))));
+		if (chunk_offset < last_chunk_offset)
+			return midx_error("chunks are non-monotonic");
+		if (chunk_offset >= trailer_offset)
+			return midx_error("chunks extend beyond the trailer");
+		if (last_chunk != NULL)
+			last_chunk->length = (size_t)(chunk_offset - last_chunk_offset);
+		last_chunk_offset = chunk_offset;
+
+		switch (ntohl(*((uint32_t *)(chunk_hdr + 0)))) {
+		case MIDX_PACKFILE_NAMES_ID:
+			chunk_packfile_names.offset = last_chunk_offset;
+			last_chunk = &chunk_packfile_names;
+			break;
+
+		case MIDX_OID_FANOUT_ID:
+			chunk_oid_fanout.offset = last_chunk_offset;
+			last_chunk = &chunk_oid_fanout;
+			break;
+
+		case MIDX_OID_LOOKUP_ID:
+			chunk_oid_lookup.offset = last_chunk_offset;
+			last_chunk = &chunk_oid_lookup;
+			break;
+
+		case MIDX_OBJECT_OFFSETS_ID:
+			chunk_object_offsets.offset = last_chunk_offset;
+			last_chunk = &chunk_object_offsets;
+			break;
+
+		case MIDX_OBJECT_LARGE_OFFSETS_ID:
+			chunk_object_large_offsets.offset = last_chunk_offset;
+			last_chunk = &chunk_object_large_offsets;
+			break;
+
+		default:
+			return midx_error("unrecognized chunk ID");
+		}
+	}
+	last_chunk->length = (size_t)(trailer_offset - last_chunk_offset);
+
+	error = midx_parse_packfile_names(
+			idx, data, ntohl(hdr->packfiles), &chunk_packfile_names);
+	if (error < 0)
+		return error;
+	error = midx_parse_oid_fanout(idx, data, &chunk_oid_fanout);
+	if (error < 0)
+		return error;
+	error = midx_parse_oid_lookup(idx, data, &chunk_oid_lookup);
+	if (error < 0)
+		return error;
+	error = midx_parse_object_offsets(idx, data, &chunk_object_offsets);
+	if (error < 0)
+		return error;
+	error = midx_parse_object_large_offsets(idx, data, &chunk_object_large_offsets);
+	if (error < 0)
+		return error;
+
+	return 0;
+}
+
+int git_midx_open(
+		git_midx_file **idx_out,
+		const char *path)
+{
+	git_midx_file *idx;
+	git_file fd = -1;
+	size_t idx_size;
+	struct stat st;
+	int error;
+
+	/* TODO: properly open the file without access time using O_NOATIME */
+	fd = git_futils_open_ro(path);
+	if (fd < 0)
+		return fd;
+
+	if (p_fstat(fd, &st) < 0) {
+		p_close(fd);
+		git_error_set(GIT_ERROR_ODB, "multi-pack-index file not found - '%s'", path);
+		return -1;
+	}
+
+	if (!S_ISREG(st.st_mode) || !git__is_sizet(st.st_size)) {
+		p_close(fd);
+		git_error_set(GIT_ERROR_ODB, "invalid pack index '%s'", path);
+		return -1;
+	}
+	idx_size = (size_t)st.st_size;
+
+	idx = git__calloc(1, sizeof(git_midx_file));
+	GIT_ERROR_CHECK_ALLOC(idx);
+
+	error = git_futils_mmap_ro(&idx->index_map, fd, 0, idx_size);
+	p_close(fd);
+	if (error < 0) {
+		git_midx_free(idx);
+		return error;
+	}
+
+	if ((error = git_midx_parse(idx, idx->index_map.data, idx_size)) < 0) {
+		git_midx_free(idx);
+		return error;
+	}
+
+	*idx_out = idx;
+	return 0;
+}
+
+int git_midx_entry_find(
+		git_midx_entry *e,
+		git_midx_file *idx,
+		const git_oid *short_oid,
+		size_t len)
+{
+	int pos, found = 0;
+	size_t pack_index;
+	uint32_t hi, lo;
+	const git_oid *current = NULL;
+	const unsigned char *object_offset;
+	off64_t offset;
+
+	assert(idx);
+
+	hi = ntohl(idx->oid_fanout[(int)short_oid->id[0]]);
+	lo = ((short_oid->id[0] == 0x0) ? 0 : ntohl(idx->oid_fanout[(int)short_oid->id[0] - 1]));
+
+	pos = git_pack__lookup_sha1(idx->oid_lookup, 20, lo, hi, short_oid->id);
+
+	if (pos >= 0) {
+		/* An object matching exactly the oid was found */
+		found = 1;
+		current = idx->oid_lookup + pos;
+	} else {
+		/* No object was found */
+		/* pos refers to the object with the "closest" oid to short_oid */
+		pos = -1 - pos;
+		if (pos < (int)idx->num_objects) {
+			current = idx->oid_lookup + pos;
+
+			if (!git_oid_ncmp(short_oid, current, len))
+				found = 1;
+		}
+	}
+
+	if (found && len != GIT_OID_HEXSZ && pos + 1 < (int)idx->num_objects) {
+		/* Check for ambiguousity */
+		const git_oid *next = current + 1;
+
+		if (!git_oid_ncmp(short_oid, next, len)) {
+			found = 2;
+		}
+	}
+
+	if (!found)
+		return git_odb__error_notfound("failed to find offset for multi-pack index entry", short_oid, len);
+	if (found > 1)
+		return git_odb__error_ambiguous("found multiple offsets for multi-pack index entry");
+
+	object_offset = idx->object_offsets + pos * 8;
+	offset = ntohl(*((uint32_t *)(object_offset + 4)));
+	if (offset & 0x80000000) {
+		uint32_t object_large_offsets_pos = offset & 0x7fffffff;
+		const unsigned char *object_large_offsets_index = idx->object_large_offsets;
+
+		/* Make sure we're not being sent out of bounds */
+		if (object_large_offsets_pos >= idx->num_object_large_offsets)
+			return git_odb__error_notfound("invalid index into the object large offsets table", short_oid, len);
+
+		object_large_offsets_index += 8 * object_large_offsets_pos;
+
+		offset = (((uint64_t)ntohl(*((uint32_t *)(object_large_offsets_index + 0)))) << 32) |
+				ntohl(*((uint32_t *)(object_large_offsets_index + 4)));
+	}
+	pack_index = ntohl(*((uint32_t *)(object_offset + 0)));
+	if (pack_index >= git_vector_length(&idx->packfile_names))
+		return midx_error("invalid index into the packfile names table");
+	e->pack_index = pack_index;
+	e->offset = offset;
+	git_oid_cpy(&e->sha1, current);
+	return 0;
+}
+
+void git_midx_close(git_midx_file *idx)
+{
+	assert(idx);
+
+	if (idx->index_map.data)
+		git_futils_mmap_free(&idx->index_map);
+	git_vector_free(&idx->packfile_names);
+}
+
+void git_midx_free(git_midx_file *idx)
+{
+	if (!idx)
+		return;
+
+	git_midx_close(idx);
+	git__free(idx);
+}
diff --git a/src/midx.h b/src/midx.h
new file mode 100644
index 000000000..e6a64cd81
--- /dev/null
+++ b/src/midx.h
@@ -0,0 +1,83 @@
+/*
+ * Copyright (C) the libgit2 contributors. All rights reserved.
+ *
+ * This file is part of libgit2, distributed under the GNU GPL v2 with
+ * a Linking Exception. For full terms see the included COPYING file.
+ */
+
+#ifndef INCLUDE_midx_h__
+#define INCLUDE_midx_h__
+
+#include "common.h"
+
+#include <ctype.h>
+
+#include "map.h"
+#include "mwindow.h"
+
+/*
+ * A multi-pack-index file.
+ *
+ * This file contains a merged index for multiple independent .pack files. This
+ * can help speed up locating objects without requiring a garbage collection
+ * cycle to create a single .pack file.
+ *
+ * Support for this feature was added in git 2.21, and requires the
+ * `core.multiPackIndex` config option to be set.
+ */
+typedef struct git_midx_file {
+	git_map index_map;
+
+	/* The table of Packfile Names. */
+	git_vector packfile_names;
+
+	/* The OID Fanout table. */
+	const uint32_t *oid_fanout;
+	/* The total number of objects in the index. */
+	uint32_t num_objects;
+
+	/* The OID Lookup table. */
+	git_oid *oid_lookup;
+
+	/* The Object Offsets table. Each entry has two 4-byte fields with the pack index and the offset. */
+	const unsigned char *object_offsets;
+
+	/* The Object Large Offsets table. */
+	const unsigned char *object_large_offsets;
+	/* The number of entries in the Object Large Offsets table. Each entry has an 8-byte with an offset */
+	size_t num_object_large_offsets;
+
+	/* The trailer of the file. Contains the SHA1-checksum of the whole file. */
+	git_oid checksum;
+} git_midx_file;
+
+/*
+ * An entry in the multi-pack-index file. Similar in purpose to git_pack_entry.
+ */
+typedef struct git_midx_entry {
+	/* The index within idx->packfile_names where the packfile name can be found. */
+	size_t pack_index;
+	/* The offset within the .pack file where the requested object is found. */
+	off64_t offset;
+	/* The SHA-1 hash of the requested object. */
+	git_oid sha1;
+} git_midx_entry;
+
+int git_midx_open(
+		git_midx_file **idx_out,
+		const char *path);
+int git_midx_entry_find(
+		git_midx_entry *e,
+		git_midx_file *idx,
+		const git_oid *short_oid,
+		size_t len);
+void git_midx_close(git_midx_file *idx);
+void git_midx_free(git_midx_file *idx);
+
+/* This is exposed for use in the fuzzers. */
+int git_midx_parse(
+		git_midx_file *idx,
+		const unsigned char *data,
+		size_t size);
+
+#endif
diff --git a/src/mwindow.c b/src/mwindow.c
index 262786a5f..ac26452f4 100644
--- a/src/mwindow.c
+++ b/src/mwindow.c
@@ -22,11 +22,15 @@
 #define DEFAULT_MAPPED_LIMIT \
 	((1024 * 1024) * (sizeof(void*) >= 8 ? 8192ULL : 256UL))
 
+/* default is unlimited */
+#define DEFAULT_FILE_LIMIT 0
+
 size_t git_mwindow__window_size = DEFAULT_WINDOW_SIZE;
 size_t git_mwindow__mapped_limit = DEFAULT_MAPPED_LIMIT;
+size_t git_mwindow__file_limit = DEFAULT_FILE_LIMIT;
 
 /* Whenever you want to read or modify this, grab git__mwindow_mutex */
-static git_mwindow_ctl mem_ctl;
+git_mwindow_ctl git_mwindow__mem_ctl;
 
 /* Global list of mwindow files, to open packs once across repos */
 git_strmap *git__pack_cache = NULL;
@@ -132,7 +136,7 @@ void git_mwindow_free_all(git_mwindow_file *mwf)
  */
 void git_mwindow_free_all_locked(git_mwindow_file *mwf)
 {
-	git_mwindow_ctl *ctl = &mem_ctl;
+	git_mwindow_ctl *ctl = &git_mwindow__mem_ctl;
 	size_t i;
 
 	/*
@@ -174,82 +178,146 @@ int git_mwindow_contains(git_mwindow *win, off64_t offset)
 		&& offset <= (off64_t)(win_off + win->window_map.len);
 }
 
-/*
- * Find the least-recently-used window in a file
- */
-static void git_mwindow_scan_lru(
-	git_mwindow_file *mwf,
-	git_mwindow **lru_w,
-	git_mwindow **lru_l)
-{
-	git_mwindow *w, *w_l;
+#define GIT_MWINDOW__LRU -1
+#define GIT_MWINDOW__MRU 1
 
-	for (w_l = NULL, w = mwf->windows; w; w = w->next) {
-		if (!w->inuse_cnt) {
-			/*
-			 * If the current one is more recent than the last one,
-			 * store it in the output parameter. If lru_w is NULL,
-			 * it's the first loop, so store it as well.
-			 */
-			if (!*lru_w || w->last_used < (*lru_w)->last_used) {
-				*lru_w = w;
-				*lru_l = w_l;
-			}
+/*
+ * Find the least- or most-recently-used window in a file that is not currently
+ * being used. The 'only_unused' flag controls whether the caller requires the
+ * file to only have unused windows. If '*out_window' is non-null, it is used as
+ * a starting point for the comparison.
+ *
+ * Returns whether such a window was found in the file.
+ */
+static bool git_mwindow_scan_recently_used(
+		git_mwindow_file *mwf,
+		git_mwindow **out_window,
+		git_mwindow **out_last,
+		bool only_unused,
+		int comparison_sign)
+{
+	git_mwindow *w, *w_last;
+	git_mwindow *lru_window = NULL, *lru_last = NULL;
+	bool found = false;
+
+	assert(mwf);
+	assert(out_window);
+
+	lru_window = *out_window;
+	if (out_last)
+		lru_last = *out_last;
+
+	for (w_last = NULL, w = mwf->windows; w; w_last = w, w = w->next) {
+		if (w->inuse_cnt) {
+			if (only_unused)
+				return false;
+			/* This window is currently being used. Skip it. */
+			continue;
+		}
+
+		/*
+		 * If the current one is more (or less) recent than the last one,
+		 * store it in the output parameter. If lru_window is NULL,
+		 * it's the first loop, so store it as well.
+		 */
+		if (!lru_window ||
+				(comparison_sign == GIT_MWINDOW__LRU && lru_window->last_used > w->last_used) ||
+				(comparison_sign == GIT_MWINDOW__MRU && lru_window->last_used < w->last_used)) {
+			lru_window = w;
+			lru_last = w_last;
+			found = true;
 		}
-		w_l = w;
 	}
+
+	if (!found)
+		return false;
+
+	*out_window = lru_window;
+	if (out_last)
+		*out_last = lru_last;
+	return true;
 }
 
 /*
- * Close the least recently used window. You should check to see if
- * the file descriptors need closing from time to time. Called under
- * lock from new_window.
+ * Close the least recently used window (that is currently not being used) out
+ * of all the files. Called under lock from new_window.
  */
-static int git_mwindow_close_lru(git_mwindow_file *mwf)
+static int git_mwindow_close_lru_window(void)
 {
-	git_mwindow_ctl *ctl = &mem_ctl;
+	git_mwindow_ctl *ctl = &git_mwindow__mem_ctl;
+	git_mwindow_file *cur;
 	size_t i;
-	git_mwindow *lru_w = NULL, *lru_l = NULL, **list = &mwf->windows;
+	git_mwindow *lru_window = NULL, *lru_last = NULL, **list = NULL;
 
-	/* FIXME: Does this give us any advantage? */
-	if(mwf->windows)
-		git_mwindow_scan_lru(mwf, &lru_w, &lru_l);
-
-	for (i = 0; i < ctl->windowfiles.length; ++i) {
-		git_mwindow *last = lru_w;
-		git_mwindow_file *cur = git_vector_get(&ctl->windowfiles, i);
-		git_mwindow_scan_lru(cur, &lru_w, &lru_l);
-		if (lru_w != last)
+	git_vector_foreach(&ctl->windowfiles, i, cur) {
+		if (git_mwindow_scan_recently_used(
+				cur, &lru_window, &lru_last, false, GIT_MWINDOW__LRU)) {
 			list = &cur->windows;
+		}
 	}
 
-	if (!lru_w) {
+	if (!lru_window) {
 		git_error_set(GIT_ERROR_OS, "failed to close memory window; couldn't find LRU");
 		return -1;
 	}
 
-	ctl->mapped -= lru_w->window_map.len;
-	git_futils_mmap_free(&lru_w->window_map);
+	ctl->mapped -= lru_window->window_map.len;
+	git_futils_mmap_free(&lru_window->window_map);
 
-	if (lru_l)
-		lru_l->next = lru_w->next;
+	if (lru_last)
+		lru_last->next = lru_window->next;
 	else
-		*list = lru_w->next;
+		*list = lru_window->next;
 
-	git__free(lru_w);
+	git__free(lru_window);
 	ctl->open_windows--;
 
 	return 0;
 }
 
+/*
+ * Close the file that does not have any open windows AND whose
+ * most-recently-used window is the least-recently used one across all
+ * currently open files.
+ *
+ * Called under lock from new_window.
+ */
+static int git_mwindow_close_lru_file(void)
+{
+	git_mwindow_ctl *ctl = &git_mwindow__mem_ctl;
+	git_mwindow_file *lru_file = NULL, *current_file = NULL;
+	git_mwindow *lru_window = NULL;
+	size_t i;
+
+	git_vector_foreach(&ctl->windowfiles, i, current_file) {
+		git_mwindow *mru_window = NULL;
+		if (!git_mwindow_scan_recently_used(
+				current_file, &mru_window, NULL, true, GIT_MWINDOW__MRU)) {
+			continue;
+		}
+		if (!lru_window || lru_window->last_used > mru_window->last_used)
+			lru_file = current_file;
+	}
+
+	if (!lru_file) {
+		git_error_set(GIT_ERROR_OS, "failed to close memory window file; couldn't find LRU");
+		return -1;
+	}
+
+	git_mwindow_free_all_locked(lru_file);
+	p_close(lru_file->fd);
+	lru_file->fd = -1;
+
+	return 0;
+}
+
 /* This gets called under lock from git_mwindow_open */
 static git_mwindow *new_window(
-	git_mwindow_file *mwf,
 	git_file fd,
 	off64_t size,
 	off64_t offset)
 {
-	git_mwindow_ctl *ctl = &mem_ctl;
+	git_mwindow_ctl *ctl = &git_mwindow__mem_ctl;
 	size_t walign = git_mwindow__window_size / 2;
 	off64_t len;
 	git_mwindow *w;
@@ -269,7 +337,7 @@ static git_mwindow *new_window(
 	ctl->mapped += (size_t)len;
 
 	while (git_mwindow__mapped_limit < ctl->mapped &&
-			git_mwindow_close_lru(mwf) == 0) /* nop */;
+			git_mwindow_close_lru_window() == 0) /* nop */;
 
 	/*
 	 * We treat `mapped_limit` as a soft limit. If we can't find a
@@ -283,7 +351,7 @@ static git_mwindow *new_window(
 		 * we're below our soft limits, so free up what we can and try again.
 		 */
 
-		while (git_mwindow_close_lru(mwf) == 0)
+		while (git_mwindow_close_lru_window() == 0)
 			/* nop */;
 
 		if (git_futils_mmap_ro(&w->window_map, fd, w->offset, (size_t)len) < 0) {
@@ -315,7 +383,7 @@ unsigned char *git_mwindow_open(
 	size_t extra,
 	unsigned int *left)
 {
-	git_mwindow_ctl *ctl = &mem_ctl;
+	git_mwindow_ctl *ctl = &git_mwindow__mem_ctl;
 	git_mwindow *w = *cursor;
 
 	if (git_mutex_lock(&git__mwindow_mutex)) {
@@ -339,7 +407,7 @@ unsigned char *git_mwindow_open(
 		 * one.
 		 */
 		if (!w) {
-			w = new_window(mwf, mwf->fd, mwf->size, offset);
+			w = new_window(mwf->fd, mwf->size, offset);
 			if (w == NULL) {
 				git_mutex_unlock(&git__mwindow_mutex);
 				return NULL;
@@ -367,7 +435,7 @@ unsigned char *git_mwindow_open(
 
 int git_mwindow_file_register(git_mwindow_file *mwf)
 {
-	git_mwindow_ctl *ctl = &mem_ctl;
+	git_mwindow_ctl *ctl = &git_mwindow__mem_ctl;
 	int ret;
 
 	if (git_mutex_lock(&git__mwindow_mutex)) {
@@ -381,6 +449,11 @@ int git_mwindow_file_register(git_mwindow_file *mwf)
 		return -1;
 	}
 
+	if (git_mwindow__file_limit) {
+		while (git_mwindow__file_limit <= ctl->windowfiles.length &&
+				git_mwindow_close_lru_file() == 0) /* nop */;
+	}
+
 	ret = git_vector_insert(&ctl->windowfiles, mwf);
 	git_mutex_unlock(&git__mwindow_mutex);
 
@@ -389,7 +462,7 @@ int git_mwindow_file_register(git_mwindow_file *mwf)
 
 void git_mwindow_file_deregister(git_mwindow_file *mwf)
 {
-	git_mwindow_ctl *ctl = &mem_ctl;
+	git_mwindow_ctl *ctl = &git_mwindow__mem_ctl;
 	git_mwindow_file *cur;
 	size_t i;
 
diff --git a/src/net.c b/src/net.c
index d42fce52d..dbde626b5 100644
--- a/src/net.c
+++ b/src/net.c
@@ -336,7 +336,12 @@ bool git_net_url_valid(git_net_url *url)
 
 int git_net_url_is_default_port(git_net_url *url)
 {
-	return (strcmp(url->port, default_port_for_scheme(url->scheme)) == 0);
+	const char *default_port;
+
+	if ((default_port = default_port_for_scheme(url->scheme)) != NULL)
+		return (strcmp(url->port, default_port) == 0);
+	else
+		return false;
 }
 
 void git_net_url_swap(git_net_url *a, git_net_url *b)
diff --git a/src/object.c b/src/object.c
index 1b47ab1a6..749b0caf2 100644
--- a/src/object.c
+++ b/src/object.c
@@ -86,7 +86,8 @@ int git_object__from_raw(
 	GIT_ERROR_CHECK_ALLOC(object);
 	object->cached.flags = GIT_CACHE_STORE_PARSED;
 	object->cached.type = type;
-	git_odb_hash(&object->cached.oid, data, size, type);
+	if ((error = git_odb_hash(&object->cached.oid, data, size, type)) < 0)
+		return error;
 
 	/* Parse raw object data */
 	def = &git_objects_table[type];
diff --git a/src/odb.c b/src/odb.c
index 68d9a9a3f..129a63255 100644
--- a/src/odb.c
+++ b/src/odb.c
@@ -44,8 +44,8 @@ typedef struct
 
 static git_cache *odb_cache(git_odb *odb)
 {
-	if (odb->rc.owner != NULL) {
-		git_repository *owner = odb->rc.owner;
+	git_repository *owner = GIT_REFCOUNT_OWNER(odb);
+	if (owner != NULL) {
 		return &owner->objects;
 	}
 
@@ -664,7 +664,7 @@ int git_odb_open(git_odb **out, const char *objects_dir)
 int git_odb__set_caps(git_odb *odb, int caps)
 {
 	if (caps == GIT_ODB_CAP_FROM_OWNER) {
-		git_repository *repo = odb->rc.owner;
+		git_repository *repo = GIT_REFCOUNT_OWNER(odb);
 		int val;
 
 		if (!repo) {
@@ -1283,12 +1283,13 @@ int git_odb_write(
 	git_oid *oid, git_odb *db, const void *data, size_t len, git_object_t type)
 {
 	size_t i;
-	int error = GIT_ERROR;
+	int error;
 	git_odb_stream *stream;
 
 	assert(oid && db);
 
-	git_odb_hash(oid, data, len, type);
+	if ((error = git_odb_hash(oid, data, len, type)) < 0)
+		return error;
 
 	if (git_oid_is_zero(oid))
 		return error_null_oid(GIT_EINVALID, "cannot write object");
@@ -1296,7 +1297,7 @@ int git_odb_write(
 	if (git_odb__freshen(db, oid))
 		return 0;
 
-	for (i = 0; i < db->backends.length && error < 0; ++i) {
+	for (i = 0, error = GIT_ERROR; i < db->backends.length && error < 0; ++i) {
 		backend_internal *internal = git_vector_get(&db->backends, i);
 		git_odb_backend *b = internal->backend;
 
@@ -1510,10 +1511,12 @@ void *git_odb_backend_data_alloc(git_odb_backend *backend, size_t len)
 	return git__malloc(len);
 }
 
+#ifndef GIT_DEPRECATE_HARD
 void *git_odb_backend_malloc(git_odb_backend *backend, size_t len)
 {
 	return git_odb_backend_data_alloc(backend, len);
 }
+#endif
 
 void git_odb_backend_data_free(git_odb_backend *backend, void *data)
 {
diff --git a/src/odb_loose.c b/src/odb_loose.c
index 4a54b3fc0..68287795a 100644
--- a/src/odb_loose.c
+++ b/src/odb_loose.c
@@ -304,7 +304,7 @@ static int read_loose_standard(git_rawobj *out, git_buf *obj)
 	 * (including the initial sequence in the head buffer).
 	 */
 	if (GIT_ADD_SIZET_OVERFLOW(&alloc_size, hdr.size, 1) ||
-		(body = git__malloc(alloc_size)) == NULL) {
+		(body = git__calloc(1, alloc_size)) == NULL) {
 		error = -1;
 		goto done;
 	}
@@ -386,8 +386,8 @@ static int read_header_loose_standard(
 	git_rawobj *out, const unsigned char *data, size_t len)
 {
 	git_zstream zs = GIT_ZSTREAM_INIT;
-	obj_hdr hdr;
-	unsigned char inflated[MAX_HEADER_LEN];
+	obj_hdr hdr = {0};
+	unsigned char inflated[MAX_HEADER_LEN] = {0};
 	size_t header_len, inflated_len = sizeof(inflated);
 	int error;
 
diff --git a/src/odb_mempack.c b/src/odb_mempack.c
index 69c423bec..6d20b39ba 100644
--- a/src/odb_mempack.c
+++ b/src/odb_mempack.c
@@ -110,6 +110,8 @@ int git_mempack_dump(git_buf *pack, git_repository *repo, git_odb_backend *_back
 	if (git_packbuilder_new(&packbuilder, repo) < 0)
 		return -1;
 
+	git_packbuilder_set_threads(packbuilder, 0);
+
 	for (i = 0; i < db->commits.size; ++i) {
 		struct memobject *commit = db->commits.ptr[i];
 
diff --git a/src/oid.c b/src/oid.c
index 641956652..7831aca89 100644
--- a/src/oid.c
+++ b/src/oid.c
@@ -253,10 +253,12 @@ int git_oid_is_zero(const git_oid *oid_a)
 	return 1;
 }
 
+#ifndef GIT_DEPRECATE_HARD
 int git_oid_iszero(const git_oid *oid_a)
 {
 	return git_oid_is_zero(oid_a);
 }
+#endif
 
 typedef short node_index;
 
diff --git a/src/pack-objects.c b/src/pack-objects.c
index 49b4e4772..cf10e6cb5 100644
--- a/src/pack-objects.c
+++ b/src/pack-objects.c
@@ -141,14 +141,11 @@ int git_packbuilder_new(git_packbuilder **out, git_repository *repo)
 	pb = git__calloc(1, sizeof(*pb));
 	GIT_ERROR_CHECK_ALLOC(pb);
 
-	if (git_oidmap_new(&pb->object_ix) < 0)
+	if (git_oidmap_new(&pb->object_ix) < 0 ||
+	    git_oidmap_new(&pb->walk_objects) < 0 ||
+	    git_pool_init(&pb->object_pool, sizeof(struct walk_object)) < 0)
 		goto on_error;
 
-	if (git_oidmap_new(&pb->walk_objects) < 0)
-		goto on_error;
-
-	git_pool_init(&pb->object_pool, sizeof(struct walk_object));
-
 	pb->repo = repo;
 	pb->nr_threads = 1; /* do not spawn any thread by default */
 
@@ -1384,20 +1381,29 @@ int git_packbuilder_write(
 	git_indexer_progress_cb progress_cb,
 	void *progress_cb_payload)
 {
+	int error = -1;
+	git_buf object_path = GIT_BUF_INIT;
 	git_indexer_options opts = GIT_INDEXER_OPTIONS_INIT;
-	git_indexer *indexer;
+	git_indexer *indexer = NULL;
 	git_indexer_progress stats;
 	struct pack_write_context ctx;
 	int t;
 
 	PREPARE_PACK;
 
+	if (path == NULL) {
+		if ((error = git_repository_item_path(&object_path, pb->repo, GIT_REPOSITORY_ITEM_OBJECTS)) < 0)
+			goto cleanup;
+		if ((error = git_buf_joinpath(&object_path, git_buf_cstr(&object_path), "pack")) < 0)
+			goto cleanup;
+		path = git_buf_cstr(&object_path);
+	}
+
 	opts.progress_cb = progress_cb;
 	opts.progress_cb_payload = progress_cb_payload;
 
-	if (git_indexer_new(
-		&indexer, path, mode, pb->odb, &opts) < 0)
-		return -1;
+	if ((error = git_indexer_new(&indexer, path, mode, pb->odb, &opts)) < 0)
+		goto cleanup;
 
 	if (!git_repository__configmap_lookup(&t, pb->repo, GIT_CONFIGMAP_FSYNCOBJECTFILES) && t)
 		git_indexer__set_fsync(indexer, 1);
@@ -1405,16 +1411,18 @@ int git_packbuilder_write(
 	ctx.indexer = indexer;
 	ctx.stats = &stats;
 
-	if (git_packbuilder_foreach(pb, write_cb, &ctx) < 0 ||
-		git_indexer_commit(indexer, &stats) < 0) {
-		git_indexer_free(indexer);
-		return -1;
-	}
+	if ((error = git_packbuilder_foreach(pb, write_cb, &ctx)) < 0)
+		goto cleanup;
+
+	if ((error = git_indexer_commit(indexer, &stats)) < 0)
+		goto cleanup;
 
 	git_oid_cpy(&pb->pack_oid, git_indexer_hash(indexer));
 
+cleanup:
 	git_indexer_free(indexer);
-	return 0;
+	git_buf_dispose(&object_path);
+	return error;
 }
 
 #undef PREPARE_PACK
@@ -1634,7 +1642,7 @@ static int mark_edges_uninteresting(git_packbuilder *pb, git_commit_list *commit
 	return 0;
 }
 
-int insert_tree(git_packbuilder *pb, git_tree *tree)
+static int pack_objects_insert_tree(git_packbuilder *pb, git_tree *tree)
 {
 	size_t i;
 	int error;
@@ -1661,7 +1669,7 @@ int insert_tree(git_packbuilder *pb, git_tree *tree)
 			if ((error = git_tree_lookup(&subtree, pb->repo, entry_id)) < 0)
 				return error;
 
-			error = insert_tree(pb, subtree);
+			error = pack_objects_insert_tree(pb, subtree);
 			git_tree_free(subtree);
 
 			if (error < 0)
@@ -1687,7 +1695,7 @@ int insert_tree(git_packbuilder *pb, git_tree *tree)
 	return error;
 }
 
-int insert_commit(git_packbuilder *pb, struct walk_object *obj)
+static int pack_objects_insert_commit(git_packbuilder *pb, struct walk_object *obj)
 {
 	int error;
 	git_commit *commit = NULL;
@@ -1704,7 +1712,7 @@ int insert_commit(git_packbuilder *pb, struct walk_object *obj)
 	if ((error = git_tree_lookup(&tree, pb->repo, git_commit_tree_id(commit))) < 0)
 		goto cleanup;
 
-	if ((error = insert_tree(pb, tree)) < 0)
+	if ((error = pack_objects_insert_tree(pb, tree)) < 0)
 		goto cleanup;
 
 cleanup:
@@ -1739,7 +1747,7 @@ int git_packbuilder_insert_walk(git_packbuilder *pb, git_revwalk *walk)
 		if (obj->seen || obj->uninteresting)
 			continue;
 
-		if ((error = insert_commit(pb, obj)) < 0)
+		if ((error = pack_objects_insert_commit(pb, obj)) < 0)
 			return error;
 	}
 
diff --git a/src/pack.c b/src/pack.c
index fcf64f57d..1b5cf670f 100644
--- a/src/pack.c
+++ b/src/pack.c
@@ -488,8 +488,12 @@ int git_packfile_resolve_header(
 		size_t base_size;
 		git_packfile_stream stream;
 
-		base_offset = get_delta_base(p, &w_curs, &curpos, type, offset);
+		error = get_delta_base(&base_offset, p, &w_curs, &curpos, type, offset);
 		git_mwindow_close(&w_curs);
+
+		if (error < 0)
+			return error;
+
 		if ((error = git_packfile_stream_open(&stream, p, curpos)) < 0)
 			return error;
 		error = git_delta_read_header_fromstream(&base_size, size_p, &stream);
@@ -508,8 +512,12 @@ int git_packfile_resolve_header(
 			return error;
 		if (type != GIT_OBJECT_OFS_DELTA && type != GIT_OBJECT_REF_DELTA)
 			break;
-		base_offset = get_delta_base(p, &w_curs, &curpos, type, base_offset);
+
+		error = get_delta_base(&base_offset, p, &w_curs, &curpos, type, base_offset);
 		git_mwindow_close(&w_curs);
+
+		if (error < 0)
+			return error;
 	}
 	*type_p = type;
 
@@ -583,17 +591,11 @@ static int pack_dependency_chain(git_dependency_chain *chain_out,
 		if (type != GIT_OBJECT_OFS_DELTA && type != GIT_OBJECT_REF_DELTA)
 			break;
 
-		base_offset = get_delta_base(p, &w_curs, &curpos, type, obj_offset);
+		error = get_delta_base(&base_offset, p, &w_curs, &curpos, type, obj_offset);
 		git_mwindow_close(&w_curs);
 
-		if (base_offset == 0) {
-			error = packfile_error("delta offset is zero");
+		if (error < 0)
 			goto on_error;
-		}
-		if (base_offset < 0) { /* must actually be an error code */
-			error = (int)base_offset;
-			goto on_error;
-		}
 
 		/* we need to pass the pos *after* the delta-base bit */
 		elem->offset = curpos;
@@ -842,7 +844,10 @@ static int packfile_unpack_compressed(
 		unsigned int window_len;
 		unsigned char *in;
 
-		in = pack_window_open(p, mwindow, *position, &window_len);
+		if ((in = pack_window_open(p, mwindow, *position, &window_len)) == NULL) {
+			error = -1;
+			goto out;
+		}
 
 		if ((error = git_zstream_set_input(&zstream, in, window_len)) < 0 ||
 		    (error = git_zstream_get_output_chunk(data + total, &bytes, &zstream)) < 0) {
@@ -852,9 +857,12 @@ static int packfile_unpack_compressed(
 
 		git_mwindow_close(mwindow);
 
+		if (!bytes)
+			break;
+
 		*position += window_len - zstream.in_len;
 		total += bytes;
-	} while (total < size);
+	} while (!git_zstream_eos(&zstream));
 
 	if (total != size || !git_zstream_eos(&zstream)) {
 		git_error_set(GIT_ERROR_ZLIB, "error inflating zlib stream");
@@ -878,18 +886,21 @@ out:
  * curpos is where the data starts, delta_obj_offset is the where the
  * header starts
  */
-off64_t get_delta_base(
-	struct git_pack_file *p,
-	git_mwindow **w_curs,
-	off64_t *curpos,
-	git_object_t type,
-	off64_t delta_obj_offset)
+int get_delta_base(
+		off64_t *delta_base_out,
+		struct git_pack_file *p,
+		git_mwindow **w_curs,
+		off64_t *curpos,
+		git_object_t type,
+		off64_t delta_obj_offset)
 {
 	unsigned int left = 0;
 	unsigned char *base_info;
 	off64_t base_offset;
 	git_oid unused;
 
+	assert(delta_base_out);
+
 	base_info = pack_window_open(p, w_curs, *curpos, &left);
 	/* Assumption: the only reason this would fail is because the file is too small */
 	if (base_info == NULL)
@@ -909,12 +920,12 @@ off64_t get_delta_base(
 				return GIT_EBUFS;
 			unsigned_base_offset += 1;
 			if (!unsigned_base_offset || MSB(unsigned_base_offset, 7))
-				return 0; /* overflow */
+				return packfile_error("overflow");
 			c = base_info[used++];
 			unsigned_base_offset = (unsigned_base_offset << 7) + (c & 127);
 		}
 		if (unsigned_base_offset == 0 || (size_t)delta_obj_offset <= unsigned_base_offset)
-			return 0; /* out of bound */
+			return packfile_error("out of bounds");
 		base_offset = delta_obj_offset - unsigned_base_offset;
 		*curpos += used;
 	} else if (type == GIT_OBJECT_REF_DELTA) {
@@ -925,8 +936,12 @@ off64_t get_delta_base(
 
 			git_oid_fromraw(&oid, base_info);
 			if ((entry = git_oidmap_get(p->idx_cache, &oid)) != NULL) {
+				if (entry->offset == 0)
+					return packfile_error("delta offset is zero");
+
 				*curpos += 20;
-				return entry->offset;
+				*delta_base_out = entry->offset;
+				return 0;
 			} else {
 				/* If we're building an index, don't try to find the pack
 				 * entry; we just haven't seen it yet.  We'll make
@@ -941,9 +956,13 @@ off64_t get_delta_base(
 			return packfile_error("base entry delta is not in the same pack");
 		*curpos += 20;
 	} else
-		return 0;
+		return packfile_error("unknown object type");
 
-	return base_offset;
+	if (base_offset == 0)
+		return packfile_error("delta offset is zero");
+
+	*delta_base_out = base_offset;
+	return 0;
 }
 
 /***********************************************************
@@ -1238,14 +1257,14 @@ int git_pack_foreach_entry(
 	return error;
 }
 
-static int sha1_position(const void *table, size_t stride, unsigned lo,
-			 unsigned hi, const unsigned char *key)
+int git_pack__lookup_sha1(const void *oid_lookup_table, size_t stride, unsigned lo,
+		unsigned hi, const unsigned char *oid_prefix)
 {
-	const unsigned char *base = table;
+	const unsigned char *base = oid_lookup_table;
 
 	while (lo < hi) {
 		unsigned mi = (lo + hi) / 2;
-		int cmp = git_oid__hashcmp(base + mi * stride, key);
+		int cmp = git_oid__hashcmp(base + mi * stride, oid_prefix);
 
 		if (!cmp)
 			return mi;
@@ -1307,7 +1326,7 @@ static int pack_entry_find_offset(
 		short_oid->id[0], short_oid->id[1], short_oid->id[2], lo, hi, p->num_objects);
 #endif
 
-	pos = sha1_position(index, stride, lo, hi, short_oid->id);
+	pos = git_pack__lookup_sha1(index, stride, lo, hi, short_oid->id);
 
 	if (pos >= 0) {
 		/* An object matching exactly the oid was found */
diff --git a/src/pack.h b/src/pack.h
index a6a32ff20..cebfcd1bd 100644
--- a/src/pack.h
+++ b/src/pack.h
@@ -106,6 +106,19 @@ struct git_pack_file {
 	char pack_name[GIT_FLEX_ARRAY]; /* more */
 };
 
+/**
+ * Return the position where an OID (or a prefix) would be inserted within the
+ * OID Lookup Table of an .idx file. This performs binary search between the lo
+ * and hi indices.
+ *
+ * The stride parameter is provided because .idx files version 1 store the OIDs
+ * interleaved with the 4-byte file offsets of the objects within the .pack
+ * file (stride = 24), whereas files with version 2 store them in a contiguous
+ * flat array (stride = 20).
+ */
+int git_pack__lookup_sha1(const void *oid_lookup_table, size_t stride, unsigned lo,
+		unsigned hi, const unsigned char *oid_prefix);
+
 struct git_pack_entry {
 	off64_t offset;
 	git_oid sha1;
@@ -143,8 +156,12 @@ int git_packfile_stream_open(git_packfile_stream *obj, struct git_pack_file *p,
 ssize_t git_packfile_stream_read(git_packfile_stream *obj, void *buffer, size_t len);
 void git_packfile_stream_dispose(git_packfile_stream *obj);
 
-off64_t get_delta_base(struct git_pack_file *p, git_mwindow **w_curs,
-		off64_t *curpos, git_object_t type,
+int get_delta_base(
+		off64_t *delta_base_out,
+		struct git_pack_file *p,
+		git_mwindow **w_curs,
+		off64_t *curpos,
+		git_object_t type,
 		off64_t delta_obj_offset);
 
 void git_packfile_close(struct git_pack_file *p, bool unlink_packfile);
diff --git a/src/patch_generate.c b/src/patch_generate.c
index 18256d076..6dd61c18f 100644
--- a/src/patch_generate.c
+++ b/src/patch_generate.c
@@ -209,9 +209,7 @@ static int patch_generated_load(git_patch_generated *patch, git_patch_generated_
 
 	if ((error = git_diff_file_content__load(
 			&patch->ofile, &patch->base.diff_opts)) < 0 ||
-		should_skip_binary(patch, patch->ofile.file))
-		goto cleanup;
-	if ((error = git_diff_file_content__load(
+	    (error = git_diff_file_content__load(
 			&patch->nfile, &patch->base.diff_opts)) < 0 ||
 		should_skip_binary(patch, patch->nfile.file))
 		goto cleanup;
diff --git a/src/patch_parse.c b/src/patch_parse.c
index 9d089ad83..2bf94c2cb 100644
--- a/src/patch_parse.c
+++ b/src/patch_parse.c
@@ -198,7 +198,7 @@ static int parse_header_git_index(
 		return -1;
 
 	if (git_parse_peek(&c, &ctx->parse_ctx, 0) == 0 && c == ' ') {
-		uint16_t mode;
+		uint16_t mode = 0;
 
 		git_parse_advance_chars(&ctx->parse_ctx, 1);
 
@@ -407,10 +407,12 @@ static const parse_header_transition transitions[] = {
 
 	{ "--- "                , STATE_DIFF,       STATE_PATH,       parse_header_git_oldpath },
 	{ "--- "                , STATE_INDEX,      STATE_PATH,       parse_header_git_oldpath },
+	{ "--- "                , STATE_FILEMODE,   STATE_PATH,       parse_header_git_oldpath },
 	{ "+++ "                , STATE_PATH,       STATE_END,        parse_header_git_newpath },
 	{ "GIT binary patch"    , STATE_INDEX,      STATE_END,        NULL },
 	{ "Binary files "       , STATE_INDEX,      STATE_END,        NULL },
 
+	{ "similarity index "   , STATE_END,        STATE_SIMILARITY, parse_header_similarity },
 	{ "similarity index "   , STATE_DIFF,       STATE_SIMILARITY, parse_header_similarity },
 	{ "dissimilarity index ", STATE_DIFF,       STATE_SIMILARITY, parse_header_dissimilarity },
 	{ "rename from "        , STATE_SIMILARITY, STATE_RENAME,     parse_header_renamefrom },
@@ -940,7 +942,7 @@ static int parse_patch_body(
 		return parse_patch_hunks(patch, ctx);
 }
 
-int check_header_names(
+static int check_header_names(
 	const char *one,
 	const char *two,
 	const char *old_or_new,
diff --git a/src/path.c b/src/path.c
index 625b95c0d..f271c532c 100644
--- a/src/path.c
+++ b/src/path.c
@@ -322,7 +322,7 @@ int git_path_root(const char *path)
 	return -1;	/* Not a real error - signals that path is not rooted */
 }
 
-void git_path_trim_slashes(git_buf *path)
+static void path_trim_slashes(git_buf *path)
 {
 	int ceiling = git_path_root(path->ptr) + 1;
 	assert(ceiling >= 0);
@@ -1219,7 +1219,7 @@ int git_path_diriter_init(
 	if (git_buf_puts(&diriter->path_utf8, path) < 0)
 		return -1;
 
-	git_path_trim_slashes(&diriter->path_utf8);
+	path_trim_slashes(&diriter->path_utf8);
 
 	if (diriter->path_utf8.size == 0) {
 		git_error_set(GIT_ERROR_FILESYSTEM, "could not open directory '%s'", path);
@@ -1368,7 +1368,7 @@ int git_path_diriter_init(
 	if (git_buf_puts(&diriter->path, path) < 0)
 		return -1;
 
-	git_path_trim_slashes(&diriter->path);
+	path_trim_slashes(&diriter->path);
 
 	if (diriter->path.size == 0) {
 		git_error_set(GIT_ERROR_FILESYSTEM, "could not open directory '%s'", path);
@@ -2045,7 +2045,7 @@ int git_path_validate_system_file_ownership(const char *path)
 		git_error_set(GIT_ERROR_INVALID, "programdata configuration file owner is not valid");
 		ret = GIT_ERROR;
 	}
-	free(info);
+	git__free(info);
 
 cleanup:
 	if (descriptor)
diff --git a/src/pathspec.c b/src/pathspec.c
index 19ea9eb19..83f776c91 100644
--- a/src/pathspec.c
+++ b/src/pathspec.c
@@ -238,9 +238,9 @@ int git_pathspec__init(git_pathspec *ps, const git_strarray *paths)
 	memset(ps, 0, sizeof(*ps));
 
 	ps->prefix = git_pathspec_prefix(paths);
-	git_pool_init(&ps->pool, 1);
 
-	if ((error = git_pathspec__vinit(&ps->pathspec, paths, &ps->pool)) < 0)
+	if ((error = git_pool_init(&ps->pool, 1)) < 0 ||
+	    (error = git_pathspec__vinit(&ps->pathspec, paths, &ps->pool)) < 0)
 		git_pathspec__clear(ps);
 
 	return error;
@@ -316,7 +316,8 @@ static git_pathspec_match_list *pathspec_match_alloc(
 	if (!m)
 		return NULL;
 
-	git_pool_init(&m->pool, 1);
+	if (git_pool_init(&m->pool, 1) < 0)
+		return NULL;
 
 	/* need to keep reference to pathspec and increment refcount because
 	 * failures array stores pointers to the pattern strings of the
diff --git a/src/pool.c b/src/pool.c
index b3bc8d489..0c423dd3a 100644
--- a/src/pool.c
+++ b/src/pool.c
@@ -21,30 +21,29 @@ struct git_pool_page {
 
 static void *pool_alloc_page(git_pool *pool, size_t size);
 
-size_t git_pool__system_page_size(void)
+#ifndef GIT_DEBUG_POOL
+
+static size_t system_page_size = 0;
+
+int git_pool_global_init(void)
 {
-	static size_t size = 0;
-
-	if (!size) {
-		size_t page_size;
-		if (git__page_size(&page_size) < 0)
-			page_size = 4096;
-		/* allow space for malloc overhead */
-		size = (page_size - (2 * sizeof(void *)) - sizeof(git_pool_page));
-	}
-
-	return size;
+	if (git__page_size(&system_page_size) < 0)
+		system_page_size = 4096;
+	/* allow space for malloc overhead */
+	system_page_size -= (2 * sizeof(void *)) + sizeof(git_pool_page);
+	return 0;
 }
 
-#ifndef GIT_DEBUG_POOL
-void git_pool_init(git_pool *pool, size_t item_size)
+int git_pool_init(git_pool *pool, size_t item_size)
 {
 	assert(pool);
 	assert(item_size >= 1);
 
 	memset(pool, 0, sizeof(git_pool));
 	pool->item_size = item_size;
-	pool->page_size = git_pool__system_page_size();
+	pool->page_size = system_page_size;
+
+	return 0;
 }
 
 void git_pool_clear(git_pool *pool)
@@ -112,6 +111,11 @@ bool git_pool__ptr_in_pool(git_pool *pool, void *ptr)
 
 #else
 
+int git_pool_global_init(void)
+{
+	return 0;
+}
+
 static int git_pool__ptr_cmp(const void * a, const void * b)
 {
 	if(a > b) {
@@ -125,7 +129,7 @@ static int git_pool__ptr_cmp(const void * a, const void * b)
 	}
 }
 
-void git_pool_init(git_pool *pool, size_t item_size)
+int git_pool_init(git_pool *pool, size_t item_size)
 {
 	assert(pool);
 	assert(item_size >= 1);
@@ -134,6 +138,8 @@ void git_pool_init(git_pool *pool, size_t item_size)
 	pool->item_size = item_size;
 	pool->page_size = git_pool__system_page_size();
 	git_vector_init(&pool->allocations, 100, git_pool__ptr_cmp);
+
+	return 0;
 }
 
 void git_pool_clear(git_pool *pool)
diff --git a/src/pool.h b/src/pool.h
index 23f68990f..cecb84665 100644
--- a/src/pool.h
+++ b/src/pool.h
@@ -81,7 +81,7 @@ typedef struct {
  * Of course, you can use this in other ways, but those are the
  * two most common patterns.
  */
-extern void git_pool_init(git_pool *pool, size_t item_size);
+extern int git_pool_init(git_pool *pool, size_t item_size);
 
 /**
  * Free all items in pool
@@ -135,4 +135,12 @@ extern uint32_t git_pool__open_pages(git_pool *pool);
 #endif
 extern bool git_pool__ptr_in_pool(git_pool *pool, void *ptr);
 
+/**
+ * This function is being called by our global setup routines to
+ * initialize the system pool size.
+ *
+ * @return 0 on success, <0 on failure
+ */
+extern int git_pool_global_init(void);
+
 #endif
diff --git a/src/proxy.c b/src/proxy.c
index 367c4b1f7..78a4c5535 100644
--- a/src/proxy.c
+++ b/src/proxy.c
@@ -16,10 +16,12 @@ int git_proxy_options_init(git_proxy_options *opts, unsigned int version)
 	return 0;
 }
 
+#ifndef GIT_DEPRECATE_HARD
 int git_proxy_init_options(git_proxy_options *opts, unsigned int version)
 {
 	return git_proxy_options_init(opts, version);
 }
+#endif
 
 int git_proxy_options_dup(git_proxy_options *tgt, const git_proxy_options *src)
 {
diff --git a/src/push.c b/src/push.c
index 34867c2e4..b724188f9 100644
--- a/src/push.c
+++ b/src/push.c
@@ -555,7 +555,9 @@ int git_push_options_init(git_push_options *opts, unsigned int version)
 	return 0;
 }
 
+#ifndef GIT_DEPRECATE_HARD
 int git_push_init_options(git_push_options *opts, unsigned int version)
 {
 	return git_push_options_init(opts, version);
 }
+#endif
diff --git a/src/rebase.c b/src/rebase.c
index 0a38807a7..7c6561195 100644
--- a/src/rebase.c
+++ b/src/rebase.c
@@ -501,10 +501,12 @@ int git_rebase_options_init(git_rebase_options *opts, unsigned int version)
 	return 0;
 }
 
+#ifndef GIT_DEPRECATE_HARD
 int git_rebase_init_options(git_rebase_options *opts, unsigned int version)
 {
 	return git_rebase_options_init(opts, version);
 }
+#endif
 
 static int rebase_ensure_not_in_progress(git_repository *repo)
 {
diff --git a/src/refdb.c b/src/refdb.c
index fbbf5193c..fb86d5ccb 100644
--- a/src/refdb.c
+++ b/src/refdb.c
@@ -17,6 +17,9 @@
 #include "reflog.h"
 #include "posix.h"
 
+#define DEFAULT_NESTING_LEVEL	5
+#define MAX_NESTING_LEVEL		10
+
 int git_refdb_new(git_refdb **out, git_repository *repo)
 {
 	git_refdb *db;
@@ -134,6 +137,59 @@ int git_refdb_lookup(git_reference **out, git_refdb *db, const char *ref_name)
 	return 0;
 }
 
+int git_refdb_resolve(
+	git_reference **out,
+	git_refdb *db,
+	const char *ref_name,
+	int max_nesting)
+{
+	git_reference *ref = NULL;
+	int error = 0, nesting;
+
+	*out = NULL;
+
+	if (max_nesting > MAX_NESTING_LEVEL)
+		max_nesting = MAX_NESTING_LEVEL;
+	else if (max_nesting < 0)
+		max_nesting = DEFAULT_NESTING_LEVEL;
+
+	if ((error = git_refdb_lookup(&ref, db, ref_name)) < 0)
+		goto out;
+
+	for (nesting = 0; nesting < max_nesting; nesting++) {
+		git_reference *resolved;
+
+		if (ref->type == GIT_REFERENCE_DIRECT)
+			break;
+
+		if ((error = git_refdb_lookup(&resolved, db, git_reference_symbolic_target(ref))) < 0) {
+			/* If we found a symbolic reference with a nonexistent target, return it. */
+			if (error == GIT_ENOTFOUND) {
+				error = 0;
+				*out = ref;
+				ref = NULL;
+			}
+			goto out;
+		}
+
+		git_reference_free(ref);
+		ref = resolved;
+	}
+
+	if (ref->type != GIT_REFERENCE_DIRECT && max_nesting != 0) {
+		git_error_set(GIT_ERROR_REFERENCE,
+			"cannot resolve reference (>%u levels deep)", max_nesting);
+		error = -1;
+		goto out;
+	}
+
+	*out = ref;
+	ref = NULL;
+out:
+	git_reference_free(ref);
+	return error;
+}
+
 int git_refdb_iterator(git_reference_iterator **out, git_refdb *db, const char *glob)
 {
 	int error;
@@ -231,6 +287,85 @@ int git_refdb_reflog_read(git_reflog **out, git_refdb *db,  const char *name)
 	return 0;
 }
 
+int git_refdb_should_write_reflog(int *out, git_refdb *db, const git_reference *ref)
+{
+	int error, logall;
+
+	error = git_repository__configmap_lookup(&logall, db->repo, GIT_CONFIGMAP_LOGALLREFUPDATES);
+	if (error < 0)
+		return error;
+
+	/* Defaults to the opposite of the repo being bare */
+	if (logall == GIT_LOGALLREFUPDATES_UNSET)
+		logall = !git_repository_is_bare(db->repo);
+
+	*out = 0;
+	switch (logall) {
+	case GIT_LOGALLREFUPDATES_FALSE:
+		*out = 0;
+		break;
+
+	case GIT_LOGALLREFUPDATES_TRUE:
+		/* Only write if it already has a log,
+		 * or if it's under heads/, remotes/ or notes/
+		 */
+		*out = git_refdb_has_log(db, ref->name) ||
+			!git__prefixcmp(ref->name, GIT_REFS_HEADS_DIR) ||
+			!git__strcmp(ref->name, GIT_HEAD_FILE) ||
+			!git__prefixcmp(ref->name, GIT_REFS_REMOTES_DIR) ||
+			!git__prefixcmp(ref->name, GIT_REFS_NOTES_DIR);
+		break;
+
+	case GIT_LOGALLREFUPDATES_ALWAYS:
+		*out = 1;
+		break;
+	}
+
+	return 0;
+}
+
+int git_refdb_should_write_head_reflog(int *out, git_refdb *db, const git_reference *ref)
+{
+	git_reference *head = NULL, *resolved = NULL;
+	const char *name;
+	int error;
+
+	*out = 0;
+
+	if (ref->type == GIT_REFERENCE_SYMBOLIC) {
+		error = 0;
+		goto out;
+	}
+
+	if ((error = git_refdb_lookup(&head, db, GIT_HEAD_FILE)) < 0)
+		goto out;
+
+	if (git_reference_type(head) == GIT_REFERENCE_DIRECT)
+		goto out;
+
+	/* Go down the symref chain until we find the branch */
+	if ((error = git_refdb_resolve(&resolved, db, git_reference_symbolic_target(head), -1)) < 0) {
+		if (error != GIT_ENOTFOUND)
+			goto out;
+		error = 0;
+		name = git_reference_symbolic_target(head);
+	} else if (git_reference_type(resolved) == GIT_REFERENCE_SYMBOLIC) {
+		name = git_reference_symbolic_target(resolved);
+	} else {
+		name = git_reference_name(resolved);
+	}
+
+	if (strcmp(name, ref->name))
+		goto out;
+
+	*out = 1;
+
+out:
+	git_reference_free(resolved);
+	git_reference_free(head);
+	return error;
+}
+
 int git_refdb_has_log(git_refdb *db, const char *refname)
 {
 	assert(db && refname);
diff --git a/src/refdb.h b/src/refdb.h
index 2d4ec753a..84e19b1c3 100644
--- a/src/refdb.h
+++ b/src/refdb.h
@@ -30,6 +30,31 @@ int git_refdb_lookup(
 	git_refdb *refdb,
 	const char *ref_name);
 
+/**
+ * Resolve the reference by following symbolic references.
+ *
+ * Given a reference name, this function will follow any symbolic references up
+ * to `max_nesting` deep and return the resolved direct reference. If any of
+ * the intermediate symbolic references points to a non-existing reference,
+ * then that symbolic reference is returned instead with an error code of `0`.
+ * If the given reference is a direct reference already, it is returned
+ * directly.
+ *
+ * If `max_nesting` is `0`, the reference will not be resolved. If it's
+ * negative, it will be set to the default resolve depth which is `5`.
+ *
+ * @param out Pointer to store the result in.
+ * @param db The refdb to use for resolving the reference.
+ * @param ref_name The reference name to lookup and resolve.
+ * @param max_nesting The maximum nesting depth.
+ * @return `0` on success, a negative error code otherwise.
+ */
+int git_refdb_resolve(
+	git_reference **out,
+	git_refdb *db,
+	const char *ref_name,
+	int max_nesting);
+
 int git_refdb_rename(
 	git_reference **out,
 	git_refdb *db,
@@ -50,6 +75,50 @@ int git_refdb_delete(git_refdb *refdb, const char *ref_name, const git_oid *old_
 int git_refdb_reflog_read(git_reflog **out, git_refdb *db,  const char *name);
 int git_refdb_reflog_write(git_reflog *reflog);
 
+/**
+ * Determine whether a reflog entry should be created for the given reference.
+ *
+ * Whether or not writing to a reference should create a reflog entry is
+ * dependent on a number of things. Most importantly, there's the
+ * "core.logAllRefUpdates" setting that controls in which situations a
+ * reference should get a corresponding reflog entry. The following values for
+ * it are understood:
+ *
+ *     - "false": Do not log reference updates.
+ *
+ *     - "true": Log normal reference updates. This will write entries for
+ *               references in "refs/heads", "refs/remotes", "refs/notes" and
+ *               "HEAD" or if the reference already has a log entry.
+ *
+ *     - "always": Always create a reflog entry.
+ *
+ * If unset, the value will default to "true" for non-bare repositories and
+ * "false" for bare ones.
+ *
+ * @param out pointer to which the result will be written, `1` means a reflog
+ *            entry should be written, `0` means none should be written.
+ * @param db The refdb to decide this for.
+ * @param ref The reference one wants to check.
+ * @return `0` on success, a negative error code otherwise.
+ */
+int git_refdb_should_write_reflog(int *out, git_refdb *db, const git_reference *ref);
+
+/**
+ * Determine whether a reflog entry should be created for HEAD if creating one
+ * for the given reference
+ *
+ * In case the given reference is being pointed to by HEAD, then creating a
+ * reflog entry for this reference also requires us to create a corresponding
+ * reflog entry for HEAD. This function can be used to determine that scenario.
+ *
+ * @param out pointer to which the result will be written, `1` means a reflog
+ *            entry should be written, `0` means none should be written.
+ * @param db The refdb to decide this for.
+ * @param ref The reference one wants to check.
+ * @return `0` on success, a negative error code otherwise.
+ */
+int git_refdb_should_write_head_reflog(int *out, git_refdb *db, const git_reference *ref);
+
 int git_refdb_has_log(git_refdb *db, const char *refname);
 int git_refdb_ensure_log(git_refdb *refdb, const char *refname);
 
diff --git a/src/refdb_fs.c b/src/refdb_fs.c
index 1e53b3af5..7e0481909 100644
--- a/src/refdb_fs.c
+++ b/src/refdb_fs.c
@@ -5,8 +5,6 @@
  * a Linking Exception. For full terms see the included COPYING file.
  */
 
-#include "refdb_fs.h"
-
 #include "refs.h"
 #include "hash.h"
 #include "repository.h"
@@ -685,7 +683,8 @@ static int refdb_fs_backend__iterator(
 	iter = git__calloc(1, sizeof(refdb_fs_iter));
 	GIT_ERROR_CHECK_ALLOC(iter);
 
-	git_pool_init(&iter->pool, 1);
+	if ((error = git_pool_init(&iter->pool, 1)) < 0)
+		goto out;
 
 	if ((error = git_vector_init(&iter->loose, 8, NULL)) < 0)
 		goto out;
@@ -1129,44 +1128,6 @@ cleanup:
 }
 
 static int reflog_append(refdb_fs_backend *backend, const git_reference *ref, const git_oid *old, const git_oid *new, const git_signature *author, const char *message);
-static int has_reflog(git_repository *repo, const char *name);
-
-static int should_write_reflog(int *write, git_repository *repo, const char *name)
-{
-	int error, logall;
-
-	error = git_repository__configmap_lookup(&logall, repo, GIT_CONFIGMAP_LOGALLREFUPDATES);
-	if (error < 0)
-		return error;
-
-	/* Defaults to the opposite of the repo being bare */
-	if (logall == GIT_LOGALLREFUPDATES_UNSET)
-		logall = !git_repository_is_bare(repo);
-
-	*write = 0;
-	switch (logall) {
-	case GIT_LOGALLREFUPDATES_FALSE:
-		*write = 0;
-		break;
-
-	case GIT_LOGALLREFUPDATES_TRUE:
-		/* Only write if it already has a log,
-		 * or if it's under heads/, remotes/ or notes/
-		 */
-		*write = has_reflog(repo, name) ||
-			!git__prefixcmp(name, GIT_REFS_HEADS_DIR) ||
-			!git__strcmp(name, GIT_HEAD_FILE) ||
-			!git__prefixcmp(name, GIT_REFS_REMOTES_DIR) ||
-			!git__prefixcmp(name, GIT_REFS_NOTES_DIR);
-		break;
-
-	case GIT_LOGALLREFUPDATES_ALWAYS:
-		*write = 1;
-		break;
-	}
-
-	return 0;
-}
 
 static int cmp_old_ref(int *cmp, git_refdb_backend *backend, const char *name,
 	const git_oid *old_id, const char *old_target)
@@ -1220,54 +1181,28 @@ out:
  */
 static int maybe_append_head(refdb_fs_backend *backend, const git_reference *ref, const git_signature *who, const char *message)
 {
-	int error;
+	git_reference *head = NULL;
+	git_refdb *refdb = NULL;
+	int error, write_reflog;
 	git_oid old_id;
-	git_reference *tmp = NULL, *head = NULL, *peeled = NULL;
-	const char *name;
 
-	if (ref->type == GIT_REFERENCE_SYMBOLIC)
-		return 0;
+	if ((error = git_repository_refdb(&refdb, backend->repo)) < 0 ||
+	    (error = git_refdb_should_write_head_reflog(&write_reflog, refdb, ref)) < 0)
+		goto out;
+	if (!write_reflog)
+		goto out;
 
 	/* if we can't resolve, we use {0}*40 as old id */
 	if (git_reference_name_to_id(&old_id, backend->repo, ref->name) < 0)
 		memset(&old_id, 0, sizeof(old_id));
 
-	if ((error = git_reference_lookup(&head, backend->repo, GIT_HEAD_FILE)) < 0)
-		return error;
+	if ((error = git_reference_lookup(&head, backend->repo, GIT_HEAD_FILE)) < 0 ||
+	    (error = reflog_append(backend, head, &old_id, git_reference_target(ref), who, message)) < 0)
+		goto out;
 
-	if (git_reference_type(head) == GIT_REFERENCE_DIRECT)
-		goto cleanup;
-
-	if ((error = git_reference_lookup(&tmp, backend->repo, GIT_HEAD_FILE)) < 0)
-		goto cleanup;
-
-	/* Go down the symref chain until we find the branch */
-	while (git_reference_type(tmp) == GIT_REFERENCE_SYMBOLIC) {
-		error = git_reference_lookup(&peeled, backend->repo, git_reference_symbolic_target(tmp));
-		if (error < 0)
-			break;
-
-		git_reference_free(tmp);
-		tmp = peeled;
-	}
-
-	if (error == GIT_ENOTFOUND) {
-		error = 0;
-		name = git_reference_symbolic_target(tmp);
-	} else if (error < 0) {
-		goto cleanup;
-	} else {
-		name = git_reference_name(tmp);
-	}
-
-	if (strcmp(name, ref->name))
-		goto cleanup;
-
-	error = reflog_append(backend, head, &old_id, git_reference_target(ref), who, message);
-
-cleanup:
-	git_reference_free(tmp);
+out:
 	git_reference_free(head);
+	git_refdb_free(refdb);
 	return error;
 }
 
@@ -1336,7 +1271,10 @@ static int refdb_fs_backend__write_tail(
 	}
 
 	if (update_reflog) {
-		if ((error = should_write_reflog(&should_write, backend->repo, ref->name)) < 0)
+		git_refdb *refdb;
+
+		if ((error = git_repository_refdb__weakptr(&refdb, backend->repo)) < 0 ||
+		    (error = git_refdb_should_write_reflog(&should_write, refdb, ref)) < 0)
 			goto on_error;
 
 		if (should_write) {
diff --git a/src/refdb_fs.h b/src/refdb_fs.h
deleted file mode 100644
index 0c84814df..000000000
--- a/src/refdb_fs.h
+++ /dev/null
@@ -1,19 +0,0 @@
-/*
- * Copyright (C) the libgit2 contributors. All rights reserved.
- *
- * This file is part of libgit2, distributed under the GNU GPL v2 with
- * a Linking Exception. For full terms see the included COPYING file.
- */
-#ifndef INCLUDE_refdb_fs_h__
-#define INCLUDE_refdb_fs_h__
-
-#include "common.h"
-
-#include "strmap.h"
-
-typedef struct {
-	git_strmap *packfile;
-	time_t packfile_time;
-} git_refcache;
-
-#endif
diff --git a/src/reflog.c b/src/reflog.c
index 24dada047..34537aa1f 100644
--- a/src/reflog.c
+++ b/src/reflog.c
@@ -12,12 +12,8 @@
 #include "signature.h"
 #include "refdb.h"
 
-#include <git2/sys/refdb_backend.h>
-
-git_reflog_entry *git_reflog_entry__alloc(void)
-{
-	return git__calloc(1, sizeof(git_reflog_entry));
-}
+#include "git2/sys/refdb_backend.h"
+#include "git2/sys/reflog.h"
 
 void git_reflog_entry__free(git_reflog_entry *entry)
 {
diff --git a/src/refs.c b/src/refs.c
index 633d83abd..51635a9e4 100644
--- a/src/refs.c
+++ b/src/refs.c
@@ -27,9 +27,6 @@
 
 bool git_reference__enable_symbolic_ref_target_validation = true;
 
-#define DEFAULT_NESTING_LEVEL	5
-#define MAX_NESTING_LEVEL		10
-
 enum {
 	GIT_PACKREF_HAS_PEEL = 1,
 	GIT_PACKREF_WAS_LOOSE = 2
@@ -214,89 +211,32 @@ int git_reference_lookup_resolved(
 	const char *name,
 	int max_nesting)
 {
-	git_refname_t scan_name;
-	git_reference_t scan_type;
-	int error = 0, nesting;
-	git_reference *ref = NULL;
+	git_refname_t normalized;
 	git_refdb *refdb;
+	int error = 0;
 
 	assert(ref_out && repo && name);
 
-	*ref_out = NULL;
-
-	if (max_nesting > MAX_NESTING_LEVEL)
-		max_nesting = MAX_NESTING_LEVEL;
-	else if (max_nesting < 0)
-		max_nesting = DEFAULT_NESTING_LEVEL;
-
-	scan_type = GIT_REFERENCE_SYMBOLIC;
-
-	if ((error = reference_normalize_for_repo(scan_name, repo, name, true)) < 0)
+	if ((error = reference_normalize_for_repo(normalized, repo, name, true)) < 0 ||
+	    (error = git_repository_refdb__weakptr(&refdb, repo)) < 0 ||
+	    (error = git_refdb_resolve(ref_out, refdb, normalized, max_nesting)) < 0)
 		return error;
 
-	if ((error = git_repository_refdb__weakptr(&refdb, repo)) < 0)
-		return error;
-
-	for (nesting = max_nesting;
-		 nesting >= 0 && scan_type == GIT_REFERENCE_SYMBOLIC;
-		 nesting--)
-	{
-		if (nesting != max_nesting) {
-			strncpy(scan_name, ref->target.symbolic, sizeof(scan_name));
-			git_reference_free(ref);
-		}
-
-		if ((error = git_refdb_lookup(&ref, refdb, scan_name)) < 0)
-			return error;
-
-		scan_type = ref->type;
+	/*
+	 * The resolved reference may be a symbolic reference in case its
+	 * target doesn't exist. If the user asked us to resolve (e.g.
+	 * `max_nesting != 0`), then we need to return an error in case we got
+	 * a symbolic reference back.
+	 */
+	if (max_nesting && git_reference_type(*ref_out) == GIT_REFERENCE_SYMBOLIC) {
+		git_reference_free(*ref_out);
+		*ref_out = NULL;
+		return GIT_ENOTFOUND;
 	}
 
-	if (scan_type != GIT_REFERENCE_DIRECT && max_nesting != 0) {
-		git_error_set(GIT_ERROR_REFERENCE,
-			"cannot resolve reference (>%u levels deep)", max_nesting);
-		git_reference_free(ref);
-		return -1;
-	}
-
-	*ref_out = ref;
 	return 0;
 }
 
-int git_reference__read_head(
-	git_reference **out,
-	git_repository *repo,
-	const char *path)
-{
-	git_buf reference = GIT_BUF_INIT;
-	char *name = NULL;
-	int error;
-
-	if ((error = git_futils_readbuffer(&reference, path)) < 0)
-		goto out;
-	git_buf_rtrim(&reference);
-
-	if (git__strncmp(reference.ptr, GIT_SYMREF, strlen(GIT_SYMREF)) == 0) {
-		git_buf_consume(&reference, reference.ptr + strlen(GIT_SYMREF));
-
-		name = git_path_basename(path);
-
-		if ((*out = git_reference__alloc_symbolic(name, reference.ptr)) == NULL) {
-			error = -1;
-			goto out;
-		}
-	} else {
-		if ((error = git_reference_lookup(out, repo, reference.ptr)) < 0)
-			goto out;
-	}
-
-out:
-	git__free(name);
-	git_buf_dispose(&reference);
-
-	return error;
-}
-
 int git_reference_dwim(git_reference **out, git_repository *repo, const char *refname)
 {
 	int error = 0, i;
@@ -480,7 +420,7 @@ static int reference__create(
 	return 0;
 }
 
-int configured_ident(git_signature **out, const git_repository *repo)
+static int refs_configured_ident(git_signature **out, const git_repository *repo)
 {
 	if (repo->ident_name && repo->ident_email)
 		return git_signature_now(out, repo->ident_name, repo->ident_email);
@@ -494,7 +434,7 @@ int git_reference__log_signature(git_signature **out, git_repository *repo)
 	int error;
 	git_signature *who;
 
-	if(((error = configured_ident(&who, repo)) < 0) &&
+	if(((error = refs_configured_ident(&who, repo)) < 0) &&
 	   ((error = git_signature_default(&who, repo)) < 0) &&
 	   ((error = git_signature_now(&who, "unknown", "unknown")) < 0))
 		return error;
@@ -631,84 +571,33 @@ int git_reference_symbolic_set_target(
 typedef struct {
     const char *old_name;
     git_refname_t new_name;
-} rename_cb_data;
+} refs_update_head_payload;
 
-static int update_wt_heads(git_repository *repo, const char *path, void *payload)
+static int refs_update_head(git_repository *worktree, void *_payload)
 {
-	rename_cb_data *data = (rename_cb_data *) payload;
-	git_reference *head = NULL;
-	char *gitdir = NULL;
+	refs_update_head_payload *payload = (refs_update_head_payload *)_payload;
+	git_reference *head = NULL, *updated = NULL;
 	int error;
 
-	if ((error = git_reference__read_head(&head, repo, path)) < 0) {
-		git_error_set(GIT_ERROR_REFERENCE, "could not read HEAD when renaming references");
+	if ((error = git_reference_lookup(&head, worktree, GIT_HEAD_FILE)) < 0)
 		goto out;
-	}
-
-	if ((gitdir = git_path_dirname(path)) == NULL) {
-		error = -1;
-		goto out;
-	}
 
 	if (git_reference_type(head) != GIT_REFERENCE_SYMBOLIC ||
-	    git__strcmp(head->target.symbolic, data->old_name) != 0) {
-		error = 0;
+	    git__strcmp(git_reference_symbolic_target(head), payload->old_name) != 0)
 		goto out;
-	}
 
-	/* Update HEAD it was pointing to the reference being renamed */
-	if ((error = git_repository_create_head(gitdir, data->new_name)) < 0) {
+	/* Update HEAD if it was pointing to the reference being renamed */
+	if ((error = git_reference_symbolic_set_target(&updated, head, payload->new_name, NULL)) < 0) {
 		git_error_set(GIT_ERROR_REFERENCE, "failed to update HEAD after renaming reference");
 		goto out;
 	}
 
 out:
+	git_reference_free(updated);
 	git_reference_free(head);
-	git__free(gitdir);
-
 	return error;
 }
 
-static int reference__rename(git_reference **out, git_reference *ref, const char *new_name, int force,
-				 const git_signature *signature, const char *message)
-{
-	git_repository *repo;
-	git_refname_t normalized;
-	bool should_head_be_updated = false;
-	int error = 0;
-
-	assert(ref && new_name && signature);
-
-	repo = git_reference_owner(ref);
-
-	if ((error = reference_normalize_for_repo(
-		normalized, repo, new_name, true)) < 0)
-		return error;
-
-	/* Check if we have to update HEAD. */
-	if ((error = git_branch_is_head(ref)) < 0)
-		return error;
-
-	should_head_be_updated = (error > 0);
-
-	if ((error = git_refdb_rename(out, ref->db, ref->name, normalized, force, signature, message)) < 0)
-		return error;
-
-	/* Update HEAD if it was pointing to the reference being renamed */
-	if (should_head_be_updated) {
-		error = git_repository_set_head(ref->db->repo, normalized);
-	} else {
-		rename_cb_data payload;
-		payload.old_name = ref->name;
-		memcpy(&payload.new_name, &normalized, sizeof(normalized));
-
-		error = git_repository_foreach_head(repo, update_wt_heads, 0, &payload);
-	}
-
-	return error;
-}
-
-
 int git_reference_rename(
 	git_reference **out,
 	git_reference *ref,
@@ -716,17 +605,28 @@ int git_reference_rename(
 	int force,
 	const char *log_message)
 {
-	git_signature *who;
+	refs_update_head_payload payload;
+	git_signature *signature = NULL;
+	git_repository *repo;
 	int error;
 
 	assert(out && ref);
 
-	if ((error = git_reference__log_signature(&who, ref->db->repo)) < 0)
-		return error;
+	repo = git_reference_owner(ref);
 
-	error = reference__rename(out, ref, new_name, force, who, log_message);
-	git_signature_free(who);
+	if ((error = git_reference__log_signature(&signature, repo)) < 0 ||
+	    (error = reference_normalize_for_repo(payload.new_name, repo, new_name, true)) < 0 ||
+	    (error = git_refdb_rename(out, ref->db, ref->name, payload.new_name, force, signature, log_message)) < 0)
+		goto out;
 
+	payload.old_name = ref->name;
+
+	/* We may have to update any HEAD that was pointing to the renamed reference. */
+	if ((error = git_repository_foreach_worktree(repo, refs_update_head, &payload)) < 0)
+		goto out;
+
+out:
+	git_signature_free(signature);
 	return error;
 }
 
@@ -1154,40 +1054,6 @@ int git_reference_cmp(
 	return git_oid__cmp(&ref1->target.oid, &ref2->target.oid);
 }
 
-/**
- * Get the end of a chain of references. If the final one is not
- * found, we return the reference just before that.
- */
-static int get_terminal(git_reference **out, git_repository *repo, const char *ref_name, int nesting)
-{
-	git_reference *ref;
-	int error = 0;
-
-	if (nesting > MAX_NESTING_LEVEL) {
-		git_error_set(GIT_ERROR_REFERENCE, "reference chain too deep (%d)", nesting);
-		return GIT_ENOTFOUND;
-	}
-
-	/* set to NULL to let the caller know that they're at the end of the chain */
-	if ((error = git_reference_lookup(&ref, repo, ref_name)) < 0) {
-		*out = NULL;
-		return error;
-	}
-
-	if (git_reference_type(ref) == GIT_REFERENCE_DIRECT) {
-		*out = ref;
-		error = 0;
-	} else {
-		error = get_terminal(out, repo, git_reference_symbolic_target(ref), nesting + 1);
-		if (error == GIT_ENOTFOUND && !*out)
-			*out = ref;
-		else
-			git_reference_free(ref);
-	}
-
-	return error;
-}
-
 /*
  * Starting with the reference given by `ref_name`, follows symbolic
  * references until a direct reference is found and updated the OID
@@ -1202,31 +1068,37 @@ int git_reference__update_terminal(
 {
 	git_reference *ref = NULL, *ref2 = NULL;
 	git_signature *who = NULL;
+	git_refdb *refdb = NULL;
 	const git_signature *to_use;
 	int error = 0;
 
 	if (!sig && (error = git_reference__log_signature(&who, repo)) < 0)
-		return error;
+		goto out;
 
 	to_use = sig ? sig : who;
-	error = get_terminal(&ref, repo, ref_name, 0);
 
-	/* found a dangling symref */
-	if (error == GIT_ENOTFOUND && ref) {
-		assert(git_reference_type(ref) == GIT_REFERENCE_SYMBOLIC);
-		git_error_clear();
+	if ((error = git_repository_refdb__weakptr(&refdb, repo)) < 0)
+		goto out;
+
+	if ((error = git_refdb_resolve(&ref, refdb, ref_name, -1)) < 0) {
+		if (error == GIT_ENOTFOUND) {
+			git_error_clear();
+			error = reference__create(&ref2, repo, ref_name, oid, NULL, 0, to_use,
+						  log_message, NULL, NULL);
+		}
+		goto out;
+	}
+
+	/* In case the resolved reference is symbolic, then it's a dangling symref. */
+	if (git_reference_type(ref) == GIT_REFERENCE_SYMBOLIC) {
 		error = reference__create(&ref2, repo, ref->target.symbolic, oid, NULL, 0, to_use,
 					  log_message, NULL, NULL);
-	} else if (error == GIT_ENOTFOUND) {
-		git_error_clear();
-		error = reference__create(&ref2, repo, ref_name, oid, NULL, 0, to_use,
-					  log_message, NULL, NULL);
-	}  else if (error == 0) {
-		assert(git_reference_type(ref) == GIT_REFERENCE_DIRECT);
+	} else {
 		error = reference__create(&ref2, repo, ref->name, oid, NULL, 1, to_use,
 					  log_message, &ref->target.oid, NULL);
 	}
 
+out:
 	git_reference_free(ref2);
 	git_reference_free(ref);
 	git_signature_free(who);
diff --git a/src/refs.h b/src/refs.h
index adc345a12..e0ee03b0e 100644
--- a/src/refs.h
+++ b/src/refs.h
@@ -45,7 +45,6 @@ extern bool git_reference__enable_symbolic_ref_target_validation;
 #define GIT_REBASE_APPLY_DIR "rebase-apply/"
 #define GIT_REBASE_APPLY_REBASING_FILE GIT_REBASE_APPLY_DIR "rebasing"
 #define GIT_REBASE_APPLY_APPLYING_FILE GIT_REBASE_APPLY_DIR "applying"
-#define GIT_REFS_HEADS_MASTER_FILE GIT_REFS_HEADS_DIR "master"
 
 #define GIT_SEQUENCER_DIR "sequencer/"
 #define GIT_SEQUENCER_HEAD_FILE GIT_SEQUENCER_DIR "head"
@@ -90,6 +89,7 @@ int git_reference__is_valid_name(const char *refname, unsigned int flags);
 int git_reference__is_branch(const char *ref_name);
 int git_reference__is_remote(const char *ref_name);
 int git_reference__is_tag(const char *ref_name);
+int git_reference__is_note(const char *ref_name);
 const char *git_reference__shorthand(const char *name);
 
 /**
@@ -115,24 +115,6 @@ int git_reference_lookup_resolved(
 	const char *name,
 	int max_deref);
 
-/**
- * Read reference from a file.
- *
- * This function will read in the file at `path`. If it is a
- * symref, it will return a new unresolved symbolic reference
- * with the given name pointing to the reference pointed to by
- * the file. If it is not a symbolic reference, it will return
- * the resolved reference.
- *
- * Note that because the refdb is not involved for symbolic references, they
- * won't be owned, hence you should either not make the returned reference
- * 'externally visible', or perform the lookup before returning it to the user.
- */
-int git_reference__read_head(
-	git_reference **out,
-	git_repository *repo,
-	const char *path);
-
 int git_reference__log_signature(git_signature **out, git_repository *repo);
 
 /** Update a reference after a commit. */
diff --git a/src/regexp.c b/src/regexp.c
index 5fe49f37e..c1b9ef4cd 100644
--- a/src/regexp.c
+++ b/src/regexp.c
@@ -12,7 +12,7 @@
 int git_regexp_compile(git_regexp *r, const char *pattern, int flags)
 {
 	int erroffset, cflags = 0;
-	const char *error;
+	const char *error = NULL;
 
 	if (flags & GIT_REGEXP_ICASE)
 		cflags |= PCRE_CASELESS;
@@ -41,7 +41,7 @@ int git_regexp_match(const git_regexp *r, const char *string)
 
 int git_regexp_search(const git_regexp *r, const char *string, size_t nmatches, git_regmatch *matches)
 {
-	int static_ovec[9], *ovec;
+	int static_ovec[9] = {0}, *ovec;
 	int error;
 	size_t i;
 
diff --git a/src/remote.c b/src/remote.c
index 740dd9434..51e99dc94 100644
--- a/src/remote.c
+++ b/src/remote.c
@@ -195,10 +195,12 @@ int git_remote_create_options_init(git_remote_create_options *opts, unsigned int
 	return 0;
 }
 
+#ifndef GIT_DEPRECATE_HARD
 int git_remote_create_init_options(git_remote_create_options *opts, unsigned int version)
 {
 	return git_remote_create_options_init(opts, version);
 }
+#endif
 
 int git_remote_create_with_opts(git_remote **out, const char *url, const git_remote_create_options *opts)
 {
@@ -686,7 +688,7 @@ int git_remote__urlfordirection(git_buf *url_out, struct git_remote *remote, int
 	return resolve_url(url_out, url, direction, callbacks);
 }
 
-int set_transport_callbacks(git_transport *t, const git_remote_callbacks *cbs)
+static int remote_transport_set_callbacks(git_transport *t, const git_remote_callbacks *cbs)
 {
 	if (!t->set_callbacks || !cbs)
 		return 0;
@@ -744,7 +746,7 @@ int git_remote__connect(git_remote *remote, git_direction direction, const git_r
 	if ((error = set_transport_custom_headers(t, conn->custom_headers)) != 0)
 		goto on_error;
 
-	if ((error = set_transport_callbacks(t, callbacks)) < 0 ||
+	if ((error = remote_transport_set_callbacks(t, callbacks)) < 0 ||
 	    (error = t->connect(t, url.ptr, credentials, payload, conn->proxy, direction, flags)) != 0)
 		goto on_error;
 
@@ -1237,7 +1239,7 @@ static int prune_candidates(git_vector *candidates, git_remote *remote)
 	}
 
 out:
-	git_strarray_free(&arr);
+	git_strarray_dispose(&arr);
 	return error;
 }
 
@@ -2373,29 +2375,36 @@ int git_remote_default_branch(git_buf *out, git_remote *remote)
 	const git_remote_head *guess = NULL;
 	const git_oid *head_id;
 	size_t heads_len, i;
+	git_buf local_default = GIT_BUF_INIT;
 	int error;
 
 	assert(out);
 
 	if ((error = git_remote_ls(&heads, &heads_len, remote)) < 0)
-		return error;
+		goto done;
 
-	if (heads_len == 0)
-		return GIT_ENOTFOUND;
-
-	if (strcmp(heads[0]->name, GIT_HEAD_FILE))
-		return GIT_ENOTFOUND;
+	if (heads_len == 0 || strcmp(heads[0]->name, GIT_HEAD_FILE)) {
+		error = GIT_ENOTFOUND;
+		goto done;
+	}
 
 	git_buf_sanitize(out);
+
 	/* the first one must be HEAD so if that has the symref info, we're done */
-	if (heads[0]->symref_target)
-		return git_buf_puts(out, heads[0]->symref_target);
+	if (heads[0]->symref_target) {
+		error = git_buf_puts(out, heads[0]->symref_target);
+		goto done;
+	}
 
 	/*
 	 * If there's no symref information, we have to look over them
-	 * and guess. We return the first match unless the master
-	 * branch is a candidate. Then we return the master branch.
+	 * and guess. We return the first match unless the default
+	 * branch is a candidate. Then we return the default branch.
 	 */
+
+	if ((error = git_repository_initialbranch(&local_default, remote->repo)) < 0)
+		goto done;
+
 	head_id = &heads[0]->oid;
 
 	for (i = 1; i < heads_len; i++) {
@@ -2410,16 +2419,22 @@ int git_remote_default_branch(git_buf *out, git_remote *remote)
 			continue;
 		}
 
-		if (!git__strcmp(GIT_REFS_HEADS_MASTER_FILE, heads[i]->name)) {
+		if (!git__strcmp(local_default.ptr, heads[i]->name)) {
 			guess = heads[i];
 			break;
 		}
 	}
 
-	if (!guess)
-		return GIT_ENOTFOUND;
+	if (!guess) {
+		error = GIT_ENOTFOUND;
+		goto done;
+	}
 
-	return git_buf_puts(out, guess->name);
+	error = git_buf_puts(out, guess->name);
+
+done:
+	git_buf_dispose(&local_default);
+	return error;
 }
 
 int git_remote_upload(git_remote *remote, const git_strarray *refspecs, const git_push_options *opts)
diff --git a/src/repository.c b/src/repository.c
index fe0d696c6..513dbd61f 100644
--- a/src/repository.c
+++ b/src/repository.c
@@ -62,16 +62,18 @@ static const struct {
 	{ GIT_REPOSITORY_ITEM_COMMONDIR, GIT_REPOSITORY_ITEM_GITDIR, "worktrees", true }
 };
 
-static int check_repositoryformatversion(git_config *config);
+static int check_repositoryformatversion(int *version, git_config *config);
+static int check_extensions(git_config *config, int version);
 
 #define GIT_COMMONDIR_FILE "commondir"
 #define GIT_GITDIR_FILE "gitdir"
 
 #define GIT_FILE_CONTENT_PREFIX "gitdir:"
 
-#define GIT_BRANCH_MASTER "master"
+#define GIT_BRANCH_DEFAULT "master"
 
 #define GIT_REPO_VERSION 0
+#define GIT_REPO_MAX_VERSION 1
 
 git_buf git_repository__reserved_names_win32[] = {
 	{ DOT_GIT, 0, CONST_STRLEN(DOT_GIT) },
@@ -813,6 +815,7 @@ int git_repository_open_ext(
 		gitlink = GIT_BUF_INIT, commondir = GIT_BUF_INIT;
 	git_repository *repo = NULL;
 	git_config *config = NULL;
+	int version = 0;
 
 	if (flags & GIT_REPOSITORY_OPEN_FROM_ENV)
 		return _git_repository_open_ext_from_env(repo_ptr, start_path);
@@ -854,7 +857,10 @@ int git_repository_open_ext(
 	if (error < 0 && error != GIT_ENOTFOUND)
 		goto cleanup;
 
-	if (config && (error = check_repositoryformatversion(config)) < 0)
+	if (config && (error = check_repositoryformatversion(&version, config)) < 0)
+		goto cleanup;
+
+	if ((error = check_extensions(config, version)) < 0)
 		goto cleanup;
 
 	if ((flags & GIT_REPOSITORY_OPEN_BARE) != 0)
@@ -1350,11 +1356,11 @@ bool git_repository__reserved_names(
 }
 #endif
 
-static int check_repositoryformatversion(git_config *config)
+static int check_repositoryformatversion(int *version, git_config *config)
 {
-	int version, error;
+	int error;
 
-	error = git_config_get_int32(&version, config, "core.repositoryformatversion");
+	error = git_config_get_int32(version, config, "core.repositoryformatversion");
 	/* git ignores this if the config variable isn't there */
 	if (error == GIT_ENOTFOUND)
 		return 0;
@@ -1362,16 +1368,35 @@ static int check_repositoryformatversion(git_config *config)
 	if (error < 0)
 		return -1;
 
-	if (GIT_REPO_VERSION < version) {
+	if (GIT_REPO_MAX_VERSION < *version) {
 		git_error_set(GIT_ERROR_REPOSITORY,
-			"unsupported repository version %d. Only versions up to %d are supported.",
-			version, GIT_REPO_VERSION);
+			"unsupported repository version %d; only versions up to %d are supported",
+			*version, GIT_REPO_MAX_VERSION);
 		return -1;
 	}
 
 	return 0;
 }
 
+static int check_valid_extension(const git_config_entry *entry, void *payload)
+{
+	GIT_UNUSED(payload);
+
+	if (!strcmp(entry->name, "extensions.noop"))
+		return 0;
+
+	git_error_set(GIT_ERROR_REPOSITORY, "unsupported extension name %s", entry->name);
+	return -1;
+}
+
+static int check_extensions(git_config *config, int version)
+{
+	if (version < 1)
+		return 0;
+
+	return git_config_foreach_match(config, "^extensions\\.", check_valid_extension, NULL);
+}
+
 int git_repository_create_head(const char *git_dir, const char *ref_name)
 {
 	git_buf ref_path = GIT_BUF_INIT;
@@ -1383,9 +1408,6 @@ int git_repository_create_head(const char *git_dir, const char *ref_name)
 	    (error = git_filebuf_open(&ref, ref_path.ptr, 0, GIT_REFS_FILE_MODE)) < 0)
 		goto out;
 
-	if (!ref_name)
-		ref_name = GIT_BRANCH_MASTER;
-
 	if (git__prefixcmp(ref_name, GIT_REFS_DIR) == 0)
 		fmt = "ref: %s\n";
 	else
@@ -1583,11 +1605,15 @@ static int repo_init_config(
 	git_config *config = NULL;
 	bool is_bare = ((flags & GIT_REPOSITORY_INIT_BARE) != 0);
 	bool is_reinit = ((flags & GIT_REPOSITORY_INIT__IS_REINIT) != 0);
+	int version = 0;
 
 	if ((error = repo_local_config(&config, &cfg_path, NULL, repo_dir)) < 0)
 		goto cleanup;
 
-	if (is_reinit && (error = check_repositoryformatversion(config)) < 0)
+	if (is_reinit && (error = check_repositoryformatversion(&version, config)) < 0)
+		goto cleanup;
+
+	if ((error = check_extensions(config, version)) < 0)
 		goto cleanup;
 
 #define SET_REPO_CONFIG(TYPE, NAME, VAL) do { \
@@ -2032,6 +2058,43 @@ static int repo_init_directories(
 	return error;
 }
 
+static int repo_init_head(const char *repo_dir, const char *given)
+{
+	git_config *cfg = NULL;
+	git_buf head_path = GIT_BUF_INIT, cfg_branch = GIT_BUF_INIT;
+	const char *initial_head = NULL;
+	int error;
+
+	if ((error = git_buf_joinpath(&head_path, repo_dir, GIT_HEAD_FILE)) < 0)
+		goto out;
+
+	/*
+	 * A template may have set a HEAD; use that unless it's been
+	 * overridden by the caller's given initial head setting.
+	 */
+	if (git_path_exists(head_path.ptr) && !given)
+		goto out;
+
+	if (given) {
+		initial_head = given;
+	} else if ((error = git_config_open_default(&cfg)) >= 0 &&
+	           (error = git_config_get_string_buf(&cfg_branch, cfg, "init.defaultbranch")) >= 0) {
+		initial_head = cfg_branch.ptr;
+	}
+
+	if (!initial_head)
+		initial_head = GIT_BRANCH_DEFAULT;
+
+	error = git_repository_create_head(repo_dir, initial_head);
+
+out:
+	git_config_free(cfg);
+	git_buf_dispose(&head_path);
+	git_buf_dispose(&cfg_branch);
+
+	return error;
+}
+
 static int repo_init_create_origin(git_repository *repo, const char *url)
 {
 	int error;
@@ -2062,7 +2125,7 @@ int git_repository_init_ext(
 	git_repository_init_options *opts)
 {
 	git_buf repo_path = GIT_BUF_INIT, wd_path = GIT_BUF_INIT,
-		common_path = GIT_BUF_INIT, head_path = GIT_BUF_INIT;
+		common_path = GIT_BUF_INIT;
 	const char *wd;
 	bool is_valid;
 	int error;
@@ -2096,16 +2159,7 @@ int git_repository_init_ext(
 	} else {
 		if ((error = repo_init_structure(repo_path.ptr, wd, opts)) < 0 ||
 		    (error = repo_init_config(repo_path.ptr, wd, opts->flags, opts->mode)) < 0 ||
-		    (error = git_buf_joinpath(&head_path, repo_path.ptr, GIT_HEAD_FILE)) < 0)
-			goto out;
-
-		/*
-		 * Only set the new HEAD if the file does not exist already via
-		 * a template or if the caller has explicitly supplied an
-		 * initial HEAD value.
-		 */
-		if ((!git_path_exists(head_path.ptr) || opts->initial_head) &&
-		    (error = git_repository_create_head(repo_path.ptr, opts->initial_head)) < 0)
+		    (error = repo_init_head(repo_path.ptr, opts->initial_head)) < 0)
 			goto out;
 	}
 
@@ -2117,7 +2171,6 @@ int git_repository_init_ext(
 		goto out;
 
 out:
-	git_buf_dispose(&head_path);
 	git_buf_dispose(&common_path);
 	git_buf_dispose(&repo_path);
 	git_buf_dispose(&wd_path);
@@ -2148,12 +2201,6 @@ int git_repository_head_detached(git_repository *repo)
 	return exists;
 }
 
-static int get_worktree_file_path(git_buf *out, git_repository *repo, const char *worktree, const char *file)
-{
-	git_buf_clear(out);
-	return git_buf_printf(out, "%s/worktrees/%s/%s", repo->commondir, worktree, file);
-}
-
 int git_repository_head_detached_for_worktree(git_repository *repo, const char *name)
 {
 	git_reference *ref = NULL;
@@ -2194,7 +2241,8 @@ int git_repository_head(git_reference **head_out, git_repository *repo)
 
 int git_repository_head_for_worktree(git_reference **out, git_repository *repo, const char *name)
 {
-	git_buf path = GIT_BUF_INIT;
+	git_repository *worktree_repo = NULL;
+	git_worktree *worktree = NULL;
 	git_reference *head = NULL;
 	int error;
 
@@ -2202,65 +2250,68 @@ int git_repository_head_for_worktree(git_reference **out, git_repository *repo,
 
 	*out = NULL;
 
-	if ((error = get_worktree_file_path(&path, repo, name, GIT_HEAD_FILE)) < 0 ||
-	    (error = git_reference__read_head(&head, repo, path.ptr)) < 0)
+	if ((error = git_worktree_lookup(&worktree, repo, name)) < 0 ||
+	    (error = git_repository_open_from_worktree(&worktree_repo, worktree)) < 0 ||
+	    (error = git_reference_lookup(&head, worktree_repo, GIT_HEAD_FILE)) < 0)
 		goto out;
 
 	if (git_reference_type(head) != GIT_REFERENCE_DIRECT) {
-		git_reference *resolved;
-
-		error = git_reference_lookup_resolved(&resolved, repo, git_reference_symbolic_target(head), -1);
-		git_reference_free(head);
-		head = resolved;
+		if ((error = git_reference_lookup_resolved(out, worktree_repo, git_reference_symbolic_target(head), -1)) < 0)
+			goto out;
+	} else {
+		*out = head;
+		head = NULL;
 	}
 
-	*out = head;
-
 out:
-	if (error)
-		git_reference_free(head);
-
-	git_buf_dispose(&path);
-
+	git_reference_free(head);
+	git_worktree_free(worktree);
+	git_repository_free(worktree_repo);
 	return error;
 }
 
-int git_repository_foreach_head(git_repository *repo,
-				git_repository_foreach_head_cb cb,
-				int flags, void *payload)
+int git_repository_foreach_worktree(git_repository *repo,
+				    git_repository_foreach_worktree_cb cb,
+				    void *payload)
 {
-	git_strarray worktrees = GIT_VECTOR_INIT;
-	git_buf path = GIT_BUF_INIT;
-	int error = 0;
+	git_strarray worktrees = {0};
+	git_repository *worktree_repo = NULL;
+	git_worktree *worktree = NULL;
+	int error;
 	size_t i;
 
+	if ((error = git_repository_open(&worktree_repo, repo->commondir)) < 0 ||
+	    (error = cb(worktree_repo, payload) != 0))
+		goto out;
 
-	if (!(flags & GIT_REPOSITORY_FOREACH_HEAD_SKIP_REPO)) {
-		/* Gather HEAD of main repository */
-		if ((error = git_buf_joinpath(&path, repo->commondir, GIT_HEAD_FILE)) < 0 ||
-		    (error = cb(repo, path.ptr, payload) != 0))
-			goto out;
-	}
+	git_repository_free(worktree_repo);
+	worktree_repo = NULL;
 
-	if (!(flags & GIT_REPOSITORY_FOREACH_HEAD_SKIP_WORKTREES)) {
-		if ((error = git_worktree_list(&worktrees, repo)) < 0) {
-			error = 0;
-			goto out;
-		}
+	if ((error = git_worktree_list(&worktrees, repo)) < 0)
+		goto out;
 
-		/* Gather HEADs of all worktrees */
-		for (i = 0; i < worktrees.count; i++) {
-			if (get_worktree_file_path(&path, repo, worktrees.strings[i], GIT_HEAD_FILE) < 0)
-				continue;
+	for (i = 0; i < worktrees.count; i++) {
+		git_repository_free(worktree_repo);
+		worktree_repo = NULL;
+		git_worktree_free(worktree);
+		worktree = NULL;
 
-			if ((error = cb(repo, path.ptr, payload)) != 0)
+		if ((error = git_worktree_lookup(&worktree, repo, worktrees.strings[i]) < 0) ||
+		    (error = git_repository_open_from_worktree(&worktree_repo, worktree)) < 0) {
+			if (error != GIT_ENOTFOUND)
 				goto out;
+			error = 0;
+			continue;
 		}
+
+		if ((error = cb(worktree_repo, payload)) != 0)
+			goto out;
 	}
 
 out:
-	git_buf_dispose(&path);
-	git_strarray_free(&worktrees);
+	git_strarray_dispose(&worktrees);
+	git_repository_free(worktree_repo);
+	git_worktree_free(worktree);
 	return error;
 }
 
@@ -2303,23 +2354,59 @@ static int repo_contains_no_reference(git_repository *repo)
 	return error;
 }
 
+int git_repository_initialbranch(git_buf *out, git_repository *repo)
+{
+	git_config *config;
+	git_config_entry *entry = NULL;
+	const char *branch;
+	int error;
+
+	if ((error = git_repository_config__weakptr(&config, repo)) < 0)
+		return error;
+
+	if ((error = git_config_get_entry(&entry, config, "init.defaultbranch")) == 0) {
+		branch = entry->value;
+	}
+	else if (error == GIT_ENOTFOUND) {
+		branch = GIT_BRANCH_DEFAULT;
+	}
+	else {
+		goto done;
+	}
+
+	if ((error = git_buf_puts(out, GIT_REFS_HEADS_DIR)) < 0 ||
+	    (error = git_buf_puts(out, branch)) < 0)
+	    goto done;
+
+	if (!git_reference_is_valid_name(out->ptr)) {
+		git_error_set(GIT_ERROR_INVALID, "the value of init.defaultBranch is not a valid reference name");
+		error = -1;
+	}
+
+done:
+	git_config_entry_free(entry);
+	return error;
+}
+
 int git_repository_is_empty(git_repository *repo)
 {
 	git_reference *head = NULL;
-	int is_empty = 0;
+	git_buf initialbranch = GIT_BUF_INIT;
+	int result = 0;
 
-	if (git_reference_lookup(&head, repo, GIT_HEAD_FILE) < 0)
-		return -1;
+	if ((result = git_reference_lookup(&head, repo, GIT_HEAD_FILE)) < 0 ||
+	    (result = git_repository_initialbranch(&initialbranch, repo)) < 0)
+		goto done;
 
-	if (git_reference_type(head) == GIT_REFERENCE_SYMBOLIC)
-		is_empty =
-			(strcmp(git_reference_symbolic_target(head),
-					GIT_REFS_HEADS_DIR "master") == 0) &&
-			repo_contains_no_reference(repo);
+	result = (git_reference_type(head) == GIT_REFERENCE_SYMBOLIC &&
+	          strcmp(git_reference_symbolic_target(head), initialbranch.ptr) == 0 &&
+	          repo_contains_no_reference(repo));
 
+done:
 	git_reference_free(head);
+	git_buf_dispose(&initialbranch);
 
-	return is_empty;
+	return result;
 }
 
 static const char *resolved_parent_path(const git_repository *repo, git_repository_item_t item, git_repository_item_t fallback)
@@ -2899,11 +2986,13 @@ int git_repository_init_options_init(
 	return 0;
 }
 
+#ifndef GIT_DEPRECATE_HARD
 int git_repository_init_init_options(
 	git_repository_init_options *opts, unsigned int version)
 {
 	return git_repository_init_options_init(opts, version);
 }
+#endif
 
 int git_repository_ident(const char **name, const char **email, const git_repository *repo)
 {
diff --git a/src/repository.h b/src/repository.h
index bafdb5896..de009ba5e 100644
--- a/src/repository.h
+++ b/src/repository.h
@@ -166,34 +166,11 @@ GIT_INLINE(git_attr_cache *) git_repository_attr_cache(git_repository *repo)
 int git_repository_head_tree(git_tree **tree, git_repository *repo);
 int git_repository_create_head(const char *git_dir, const char *ref_name);
 
-/*
- * Called for each HEAD.
- *
- * Can return either 0, causing the iteration over HEADs to
- * continue, or a non-0 value causing the iteration to abort. The
- * return value is passed back to the caller of
- * `git_repository_foreach_head`
- */
-typedef int (*git_repository_foreach_head_cb)(git_repository *repo, const char *path, void *payload);
+typedef int (*git_repository_foreach_worktree_cb)(git_repository *, void *);
 
-enum {
-	/* Skip enumeration of the main repository HEAD */
-	GIT_REPOSITORY_FOREACH_HEAD_SKIP_REPO      = (1u << 0),
-	/* Skip enumeration of worktree HEADs */
-	GIT_REPOSITORY_FOREACH_HEAD_SKIP_WORKTREES = (1u << 1),
-};
-
-/*
- * Iterate over repository and all worktree HEADs.
- *
- * This function will be called for the repository HEAD and for
- * all HEADS of linked worktrees. For each HEAD, the callback is
- * executed with the given payload. The return value equals the
- * return value of the last executed callback function.
- */
-int git_repository_foreach_head(git_repository *repo,
-				git_repository_foreach_head_cb cb,
-				int flags, void *payload);
+int git_repository_foreach_worktree(git_repository *repo,
+				    git_repository_foreach_worktree_cb cb,
+				    void *payload);
 
 /*
  * Weak pointers to repository internals.
@@ -255,4 +232,10 @@ extern size_t git_repository__reserved_names_posix_len;
 bool git_repository__reserved_names(
 	git_buf **out, size_t *outlen, git_repository *repo, bool include_ntfs);
 
+/*
+ * The default branch for the repository; the `init.defaultBranch`
+ * configuration option, if set, or `master` if it is not.
+ */
+int git_repository_initialbranch(git_buf *out, git_repository *repo);
+
 #endif
diff --git a/src/revert.c b/src/revert.c
index b41a2a131..b84bc7d79 100644
--- a/src/revert.c
+++ b/src/revert.c
@@ -231,7 +231,9 @@ int git_revert_options_init(git_revert_options *opts, unsigned int version)
 	return 0;
 }
 
+#ifndef GIT_DEPRECATE_HARD
 int git_revert_init_options(git_revert_options *opts, unsigned int version)
 {
 	return git_revert_options_init(opts, version);
 }
+#endif
diff --git a/src/revparse.c b/src/revparse.c
index c627de67c..1cc8b97f5 100644
--- a/src/revparse.c
+++ b/src/revparse.c
@@ -537,7 +537,8 @@ static int extract_curly_braces_content(git_buf *buf, const char *spec, size_t *
 		if (spec[*pos] == '\0')
 			return GIT_EINVALIDSPEC;
 
-		git_buf_putc(buf, spec[(*pos)++]);
+		if (git_buf_putc(buf, spec[(*pos)++]) < 0)
+			return -1;
 	}
 
 	(*pos)++;
@@ -585,7 +586,7 @@ static int extract_how_many(int *n, const char *spec, size_t *pos)
 			*pos = end_ptr - spec;
 		}
 
-	} 	while (spec[(*pos)] == kind && kind == '~');
+	} while (spec[(*pos)] == kind && kind == '~');
 
 	*n = accumulated;
 
@@ -659,7 +660,7 @@ static int ensure_left_hand_identifier_is_not_known_yet(git_object *object, git_
 	return GIT_EINVALIDSPEC;
 }
 
-int revparse__ext(
+static int revparse(
 	git_object **object_out,
 	git_reference **reference_out,
 	size_t *identifier_len_out,
@@ -835,7 +836,7 @@ int git_revparse_ext(
 	git_object *obj = NULL;
 	git_reference *ref = NULL;
 
-	if ((error = revparse__ext(&obj, &ref, &identifier_len, repo, spec)) < 0)
+	if ((error = revparse(&obj, &ref, &identifier_len, repo, spec)) < 0)
 		goto cleanup;
 
 	*object_out = obj;
diff --git a/src/revwalk.c b/src/revwalk.c
index abbd65ac2..1efb938bd 100644
--- a/src/revwalk.c
+++ b/src/revwalk.c
@@ -659,13 +659,11 @@ int git_revwalk_new(git_revwalk **revwalk_out, git_repository *repo)
 	git_revwalk *walk = git__calloc(1, sizeof(git_revwalk));
 	GIT_ERROR_CHECK_ALLOC(walk);
 
-	if (git_oidmap_new(&walk->commits) < 0)
+	if (git_oidmap_new(&walk->commits) < 0 ||
+	    git_pqueue_init(&walk->iterator_time, 0, 8, git_commit_list_time_cmp) < 0 ||
+	    git_pool_init(&walk->commit_pool, COMMIT_ALLOC) < 0)
 		return -1;
 
-	if (git_pqueue_init(&walk->iterator_time, 0, 8, git_commit_list_time_cmp) < 0)
-		return -1;
-
-	git_pool_init(&walk->commit_pool, COMMIT_ALLOC);
 	walk->get_next = &revwalk_next_unsorted;
 	walk->enqueue = &revwalk_enqueue_unsorted;
 
diff --git a/src/settings.c b/src/settings.c
index f9f6b8497..69ebcb7ab 100644
--- a/src/settings.c
+++ b/src/settings.c
@@ -59,6 +59,7 @@ int git_libgit2_features(void)
 /* Declarations for tuneable settings */
 extern size_t git_mwindow__window_size;
 extern size_t git_mwindow__mapped_limit;
+extern size_t git_mwindow__file_limit;
 extern size_t git_indexer__max_objects;
 extern bool git_disable_pack_keep_file_checks;
 
@@ -124,6 +125,14 @@ int git_libgit2_opts(int key, ...)
 		*(va_arg(ap, size_t *)) = git_mwindow__mapped_limit;
 		break;
 
+	case GIT_OPT_SET_MWINDOW_FILE_LIMIT:
+		git_mwindow__file_limit = va_arg(ap, size_t);
+		break;
+
+	case GIT_OPT_GET_MWINDOW_FILE_LIMIT:
+		*(va_arg(ap, size_t *)) = git_mwindow__file_limit;
+		break;
+
 	case GIT_OPT_GET_SEARCH_PATH:
 		if ((error = config_level_to_sysdir(va_arg(ap, int))) >= 0) {
 			git_buf *out = va_arg(ap, git_buf *);
diff --git a/src/sortedcache.c b/src/sortedcache.c
index 8f7ea23e2..ee6363f6d 100644
--- a/src/sortedcache.c
+++ b/src/sortedcache.c
@@ -25,9 +25,8 @@ int git_sortedcache_new(
 	sc = git__calloc(1, alloclen);
 	GIT_ERROR_CHECK_ALLOC(sc);
 
-	git_pool_init(&sc->pool, 1);
-
-	if (git_vector_init(&sc->items, 4, item_cmp) < 0 ||
+	if (git_pool_init(&sc->pool, 1) < 0 ||
+	    git_vector_init(&sc->items, 4, item_cmp) < 0 ||
 	    git_strmap_new(&sc->map) < 0)
 		goto fail;
 
diff --git a/src/stash.c b/src/stash.c
index 790f56fdd..0d5dc4351 100644
--- a/src/stash.c
+++ b/src/stash.c
@@ -776,10 +776,12 @@ int git_stash_apply_options_init(git_stash_apply_options *opts, unsigned int ver
 	return 0;
 }
 
+#ifndef GIT_DEPRECATE_HARD
 int git_stash_apply_init_options(git_stash_apply_options *opts, unsigned int version)
 {
 	return git_stash_apply_options_init(opts, version);
 }
+#endif
 
 #define NOTIFY_PROGRESS(opts, progress_type)				\
 	do {								\
diff --git a/src/status.c b/src/status.c
index 6a1284415..eca1f4912 100644
--- a/src/status.c
+++ b/src/status.c
@@ -548,10 +548,12 @@ int git_status_options_init(git_status_options *opts, unsigned int version)
 	return 0;
 }
 
+#ifndef GIT_DEPRECATE_HARD
 int git_status_init_options(git_status_options *opts, unsigned int version)
 {
 	return git_status_options_init(opts, version);
 }
+#endif
 
 int git_status_list_get_perfdata(
 	git_diff_perfdata *out, const git_status_list *status)
diff --git a/src/strarray.c b/src/strarray.c
new file mode 100644
index 000000000..54fe9fbfb
--- /dev/null
+++ b/src/strarray.c
@@ -0,0 +1,63 @@
+/*
+ * Copyright (C) the libgit2 contributors. All rights reserved.
+ *
+ * This file is part of libgit2, distributed under the GNU GPL v2 with
+ * a Linking Exception. For full terms see the included COPYING file.
+ */
+
+#include "util.h"
+
+#include "common.h"
+
+int git_strarray_copy(git_strarray *tgt, const git_strarray *src)
+{
+	size_t i;
+
+	assert(tgt && src);
+
+	memset(tgt, 0, sizeof(*tgt));
+
+	if (!src->count)
+		return 0;
+
+	tgt->strings = git__calloc(src->count, sizeof(char *));
+	GIT_ERROR_CHECK_ALLOC(tgt->strings);
+
+	for (i = 0; i < src->count; ++i) {
+		if (!src->strings[i])
+			continue;
+
+		tgt->strings[tgt->count] = git__strdup(src->strings[i]);
+		if (!tgt->strings[tgt->count]) {
+			git_strarray_dispose(tgt);
+			memset(tgt, 0, sizeof(*tgt));
+			return -1;
+		}
+
+		tgt->count++;
+	}
+
+	return 0;
+}
+
+void git_strarray_dispose(git_strarray *array)
+{
+	size_t i;
+
+	if (array == NULL)
+		return;
+
+	for (i = 0; i < array->count; ++i)
+		git__free(array->strings[i]);
+
+	git__free(array->strings);
+
+	memset(array, 0, sizeof(*array));
+}
+
+#ifndef GIT_DEPRECATE_HARD
+void git_strarray_free(git_strarray *array)
+{
+	git_strarray_dispose(array);
+}
+#endif
diff --git a/src/streams/openssl.c b/src/streams/openssl.c
index 5b66352ca..6a490d17d 100644
--- a/src/streams/openssl.c
+++ b/src/streams/openssl.c
@@ -655,15 +655,16 @@ static int openssl_connect(git_stream *stream)
 static int openssl_certificate(git_cert **out, git_stream *stream)
 {
 	openssl_stream *st = (openssl_stream *) stream;
-	int len;
 	X509 *cert = SSL_get_peer_certificate(st->ssl);
-	unsigned char *guard, *encoded_cert;
+	unsigned char *guard, *encoded_cert = NULL;
+	int error, len;
 
 	/* Retrieve the length of the certificate first */
 	len = i2d_X509(cert, NULL);
 	if (len < 0) {
 		git_error_set(GIT_ERROR_NET, "failed to retrieve certificate information");
-		return -1;
+		error = -1;
+		goto out;
 	}
 
 	encoded_cert = git__malloc(len);
@@ -673,18 +674,23 @@ static int openssl_certificate(git_cert **out, git_stream *stream)
 
 	len = i2d_X509(cert, &guard);
 	if (len < 0) {
-		git__free(encoded_cert);
 		git_error_set(GIT_ERROR_NET, "failed to retrieve certificate information");
-		return -1;
+		error = -1;
+		goto out;
 	}
 
 	st->cert_info.parent.cert_type = GIT_CERT_X509;
 	st->cert_info.data = encoded_cert;
 	st->cert_info.len = len;
+	encoded_cert = NULL;
 
 	*out = &st->cert_info.parent;
+	error = 0;
 
-	return 0;
+out:
+	git__free(encoded_cert);
+	X509_free(cert);
+	return error;
 }
 
 static int openssl_set_proxy(git_stream *stream, const git_proxy_options *proxy_opts)
diff --git a/src/streams/registry.c b/src/streams/registry.c
index 330032005..284431207 100644
--- a/src/streams/registry.c
+++ b/src/streams/registry.c
@@ -5,9 +5,10 @@
  * a Linking Exception. For full terms see the included COPYING file.
  */
 
-#include "git2/errors.h"
-
 #include "common.h"
+
+#include "streams/registry.h"
+
 #include "global.h"
 #include "streams/tls.h"
 #include "streams/mbedtls.h"
@@ -100,7 +101,7 @@ int git_stream_register(git_stream_t type, git_stream_registration *registration
 	return 0;
 }
 
-
+#ifndef GIT_DEPRECATE_HARD
 int git_stream_register_tls(
 	int GIT_CALLBACK(ctor)(git_stream **out, const char *host, const char *port))
 {
@@ -116,3 +117,4 @@ int git_stream_register_tls(
 		return git_stream_register(GIT_STREAM_TLS, NULL);
 	}
 }
+#endif
diff --git a/src/submodule.c b/src/submodule.c
index 1690e08f8..c32b9770a 100644
--- a/src/submodule.c
+++ b/src/submodule.c
@@ -958,7 +958,7 @@ cleanup:
 	return error;
 }
 
-const char *git_submodule_update_to_str(git_submodule_update_t update)
+static const char *submodule_update_to_str(git_submodule_update_t update)
 {
 	int i;
 	for (i = 0; i < (int)ARRAY_SIZE(_sm_update_map); ++i)
@@ -1240,10 +1240,12 @@ int git_submodule_update_options_init(git_submodule_update_options *opts, unsign
 	return 0;
 }
 
+#ifndef GIT_DEPRECATE_HARD
 int git_submodule_update_init_options(git_submodule_update_options *opts, unsigned int version)
 {
 	return git_submodule_update_options_init(opts, version);
 }
+#endif
 
 int git_submodule_update(git_submodule *sm, int init, git_submodule_update_options *_update_options)
 {
@@ -1401,7 +1403,7 @@ int git_submodule_init(git_submodule *sm, int overwrite)
 	/* write "submodule.NAME.update" if not default */
 
 	val = (sm->update == GIT_SUBMODULE_UPDATE_CHECKOUT) ?
-		NULL : git_submodule_update_to_str(sm->update);
+		NULL : submodule_update_to_str(sm->update);
 
 	if ((error = git_buf_printf(&key, "submodule.%s.update", sm->name)) < 0 ||
 		(error = git_config__update_entry(
@@ -1838,7 +1840,7 @@ int git_submodule_parse_update(git_submodule_update_t *out, const char *value)
 	return 0;
 }
 
-int git_submodule_parse_recurse(git_submodule_recurse_t *out, const char *value)
+static int submodule_parse_recurse(git_submodule_recurse_t *out, const char *value)
 {
 	int val;
 
@@ -1934,7 +1936,7 @@ static int submodule_read_config(git_submodule *sm, git_config *cfg)
 
 	if ((error = get_value(&value, cfg, &key, sm->name, "fetchRecurseSubmodules")) == 0) {
 		in_config = 1;
-		if ((error = git_submodule_parse_recurse(&sm->fetch_recurse, value)) < 0)
+		if ((error = submodule_parse_recurse(&sm->fetch_recurse, value)) < 0)
 			goto cleanup;
 		sm->fetch_recurse_default = sm->fetch_recurse;
 	} else if (error != GIT_ENOTFOUND) {
diff --git a/src/sysdir.c b/src/sysdir.c
index 9e86dc88c..6dc78c8fd 100644
--- a/src/sysdir.c
+++ b/src/sysdir.c
@@ -216,25 +216,6 @@ int git_sysdir_get(const git_buf **out, git_sysdir_t which)
 	return 0;
 }
 
-int git_sysdir_get_str(
-	char *out,
-	size_t outlen,
-	git_sysdir_t which)
-{
-	const git_buf *path = NULL;
-
-	GIT_ERROR_CHECK_ERROR(git_sysdir_check_selector(which));
-	GIT_ERROR_CHECK_ERROR(git_sysdir_get(&path, which));
-
-	if (!out || path->size >= outlen) {
-		git_error_set(GIT_ERROR_NOMEMORY, "buffer is too short for the path");
-		return GIT_EBUFS;
-	}
-
-	git_buf_copy_cstr(out, outlen, path);
-	return 0;
-}
-
 #define PATH_MAGIC "$PATH"
 
 int git_sysdir_set(git_sysdir_t which, const char *search_path)
@@ -317,8 +298,11 @@ static int git_sysdir_find_in_dirlist(
 	}
 
 done:
+	if (name)
+		git_error_set(GIT_ERROR_OS, "the %s file '%s' doesn't exist", label, name);
+	else
+		git_error_set(GIT_ERROR_OS, "the %s directory doesn't exist", label);
 	git_buf_dispose(path);
-	git_error_set(GIT_ERROR_OS, "the %s file '%s' doesn't exist", label, name);
 	return GIT_ENOTFOUND;
 }
 
diff --git a/src/sysdir.h b/src/sysdir.h
index ce1b4dc71..cc5599e38 100644
--- a/src/sysdir.h
+++ b/src/sysdir.h
@@ -93,17 +93,6 @@ extern int git_sysdir_global_init(void);
  */
 extern int git_sysdir_get(const git_buf **out, git_sysdir_t which);
 
-/**
- * Get search path into a preallocated buffer
- *
- * @param out String buffer to write into
- * @param outlen Size of string buffer
- * @param which Which search path to return
- * @return 0 on success, GIT_EBUFS if out is too small, <0 on other failure
- */
-
-extern int git_sysdir_get_str(char *out, size_t outlen, git_sysdir_t which);
-
 /**
  * Set search paths for global/system/xdg files
  *
diff --git a/src/tag.c b/src/tag.c
index a7a005ca1..037dc6664 100644
--- a/src/tag.c
+++ b/src/tag.c
@@ -524,7 +524,9 @@ int git_tag_peel(git_object **tag_target, const git_tag *tag)
 
 /* Deprecated Functions */
 
+#ifndef GIT_DEPRECATE_HARD
 int git_tag_create_frombuffer(git_oid *oid, git_repository *repo, const char *buffer, int allow_ref_overwrite)
 {
 	return git_tag_create_from_buffer(oid, repo, buffer, allow_ref_overwrite);
 }
+#endif
diff --git a/src/thread-utils.h b/src/thread-utils.h
index 035de699f..ecb4909f5 100644
--- a/src/thread-utils.h
+++ b/src/thread-utils.h
@@ -7,12 +7,30 @@
 #ifndef INCLUDE_thread_utils_h__
 #define INCLUDE_thread_utils_h__
 
-#if defined(__GNUC__) && defined(GIT_THREADS)
+#if defined(GIT_THREADS)
+
+#if defined(__clang__)
+
+# if (__clang_major__ < 3 || (__clang_major__ == 3 && __clang_minor__ < 1))
+#  error Atomic primitives do not exist on this version of clang; configure libgit2 with -DTHREADSAFE=OFF
+# else
+#  define GIT_BUILTIN_ATOMIC
+# endif
+
+#elif defined(__GNUC__)
+
 # if (__GNUC__ < 4 || (__GNUC__ == 4 && __GNUC_MINOR__ < 1))
 #  error Atomic primitives do not exist on this version of gcc; configure libgit2 with -DTHREADSAFE=OFF
+# elif (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 7))
+#  define GIT_BUILTIN_ATOMIC
+# else
+#  define GIT_BUILTIN_SYNC
 # endif
+
 #endif
 
+#endif /* GIT_THREADS */
+
 /* Common operations even if threading has been disabled */
 typedef struct {
 #if defined(GIT_WIN32)
@@ -26,21 +44,25 @@ typedef struct {
 
 typedef struct {
 #if defined(GIT_WIN32)
-	__int64 val;
+	volatile __int64 val;
 #else
-	int64_t val;
+	volatile int64_t val;
 #endif
 } git_atomic64;
 
 typedef git_atomic64 git_atomic_ssize;
 
+#define git_atomic_ssize_set git_atomic64_set
 #define git_atomic_ssize_add git_atomic64_add
+#define git_atomic_ssize_get git_atomic64_get
 
 #else
 
 typedef git_atomic git_atomic_ssize;
 
+#define git_atomic_ssize_set git_atomic_set
 #define git_atomic_ssize_add git_atomic_add
+#define git_atomic_ssize_get git_atomic_get
 
 #endif
 
@@ -56,7 +78,9 @@ GIT_INLINE(void) git_atomic_set(git_atomic *a, int val)
 {
 #if defined(GIT_WIN32)
 	InterlockedExchange(&a->val, (LONG)val);
-#elif defined(__GNUC__)
+#elif defined(GIT_BUILTIN_ATOMIC)
+	__atomic_store_n(&a->val, val, __ATOMIC_SEQ_CST);
+#elif defined(GIT_BUILTIN_SYNC)
 	__sync_lock_test_and_set(&a->val, val);
 #else
 #	error "Unsupported architecture for atomic operations"
@@ -67,7 +91,9 @@ GIT_INLINE(int) git_atomic_inc(git_atomic *a)
 {
 #if defined(GIT_WIN32)
 	return InterlockedIncrement(&a->val);
-#elif defined(__GNUC__)
+#elif defined(GIT_BUILTIN_ATOMIC)
+	return __atomic_add_fetch(&a->val, 1, __ATOMIC_SEQ_CST);
+#elif defined(GIT_BUILTIN_SYNC)
 	return __sync_add_and_fetch(&a->val, 1);
 #else
 #	error "Unsupported architecture for atomic operations"
@@ -78,7 +104,9 @@ GIT_INLINE(int) git_atomic_add(git_atomic *a, int32_t addend)
 {
 #if defined(GIT_WIN32)
 	return InterlockedExchangeAdd(&a->val, addend);
-#elif defined(__GNUC__)
+#elif defined(GIT_BUILTIN_ATOMIC)
+	return __atomic_add_fetch(&a->val, addend, __ATOMIC_SEQ_CST);
+#elif defined(GIT_BUILTIN_SYNC)
 	return __sync_add_and_fetch(&a->val, addend);
 #else
 #	error "Unsupported architecture for atomic operations"
@@ -89,25 +117,45 @@ GIT_INLINE(int) git_atomic_dec(git_atomic *a)
 {
 #if defined(GIT_WIN32)
 	return InterlockedDecrement(&a->val);
-#elif defined(__GNUC__)
+#elif defined(GIT_BUILTIN_ATOMIC)
+	return __atomic_sub_fetch(&a->val, 1, __ATOMIC_SEQ_CST);
+#elif defined(GIT_BUILTIN_SYNC)
 	return __sync_sub_and_fetch(&a->val, 1);
 #else
 #	error "Unsupported architecture for atomic operations"
 #endif
 }
 
+GIT_INLINE(int) git_atomic_get(git_atomic *a)
+{
+#if defined(GIT_WIN32)
+	return (int)InterlockedCompareExchange(&a->val, 0, 0);
+#elif defined(GIT_BUILTIN_ATOMIC)
+	return __atomic_load_n(&a->val, __ATOMIC_SEQ_CST);
+#elif defined(GIT_BUILTIN_SYNC)
+	return __sync_val_compare_and_swap(&a->val, 0, 0);
+#else
+#	error "Unsupported architecture for atomic operations"
+#endif
+}
+
 GIT_INLINE(void *) git___compare_and_swap(
 	void * volatile *ptr, void *oldval, void *newval)
 {
-	volatile void *foundval;
 #if defined(GIT_WIN32)
+	volatile void *foundval;
 	foundval = InterlockedCompareExchangePointer((volatile PVOID *)ptr, newval, oldval);
-#elif defined(__GNUC__)
+	return (foundval == oldval) ? oldval : newval;
+#elif defined(GIT_BUILTIN_ATOMIC)
+	bool success = __atomic_compare_exchange(ptr, &oldval, &newval, false, __ATOMIC_SEQ_CST, __ATOMIC_SEQ_CST);
+	return success ? oldval : newval;
+#elif defined(GIT_BUILTIN_SYNC)
+	volatile void *foundval;
 	foundval = __sync_val_compare_and_swap(ptr, oldval, newval);
+	return (foundval == oldval) ? oldval : newval;
 #else
 #	error "Unsupported architecture for atomic operations"
 #endif
-	return (foundval == oldval) ? oldval : newval;
 }
 
 GIT_INLINE(volatile void *) git___swap(
@@ -115,8 +163,30 @@ GIT_INLINE(volatile void *) git___swap(
 {
 #if defined(GIT_WIN32)
 	return InterlockedExchangePointer(ptr, newval);
-#else
+#elif defined(GIT_BUILTIN_ATOMIC)
+	void * volatile foundval;
+	__atomic_exchange(ptr, &newval, &foundval, __ATOMIC_SEQ_CST);
+	return foundval;
+#elif defined(GIT_BUILTIN_SYNC)
 	return __sync_lock_test_and_set(ptr, newval);
+#else
+#	error "Unsupported architecture for atomic operations"
+#endif
+}
+
+GIT_INLINE(volatile void *) git___load(void * volatile *ptr)
+{
+#if defined(GIT_WIN32)
+	void *newval = NULL, *oldval = NULL;
+	volatile void *foundval = NULL;
+	foundval = InterlockedCompareExchangePointer((volatile PVOID *)ptr, newval, oldval);
+	return foundval;
+#elif defined(GIT_BUILTIN_ATOMIC)
+	return (volatile void *)__atomic_load_n(ptr, __ATOMIC_SEQ_CST);
+#elif defined(GIT_BUILTIN_SYNC)
+	return (volatile void *)__sync_val_compare_and_swap(ptr, 0, 0);
+#else
+#	error "Unsupported architecture for atomic operations"
 #endif
 }
 
@@ -126,13 +196,41 @@ GIT_INLINE(int64_t) git_atomic64_add(git_atomic64 *a, int64_t addend)
 {
 #if defined(GIT_WIN32)
 	return InterlockedExchangeAdd64(&a->val, addend);
-#elif defined(__GNUC__)
+#elif defined(GIT_BUILTIN_ATOMIC)
+	return __atomic_add_fetch(&a->val, addend, __ATOMIC_SEQ_CST);
+#elif defined(GIT_BUILTIN_SYNC)
 	return __sync_add_and_fetch(&a->val, addend);
 #else
 #	error "Unsupported architecture for atomic operations"
 #endif
 }
 
+GIT_INLINE(void) git_atomic64_set(git_atomic64 *a, int64_t val)
+{
+#if defined(GIT_WIN32)
+	InterlockedExchange64(&a->val, val);
+#elif defined(GIT_BUILTIN_ATOMIC)
+	__atomic_store_n(&a->val, val, __ATOMIC_SEQ_CST);
+#elif defined(GIT_BUILTIN_SYNC)
+	__sync_lock_test_and_set(&a->val, val);
+#else
+#	error "Unsupported architecture for atomic operations"
+#endif
+}
+
+GIT_INLINE(int64_t) git_atomic64_get(git_atomic64 *a)
+{
+#if defined(GIT_WIN32)
+	return (int64_t)InterlockedCompareExchange64(&a->val, 0, 0);
+#elif defined(GIT_BUILTIN_ATOMIC)
+	return __atomic_load_n(&a->val, __ATOMIC_SEQ_CST);
+#elif defined(GIT_BUILTIN_SYNC)
+	return __sync_val_compare_and_swap(&a->val, 0, 0);
+#else
+#	error "Unsupported architecture for atomic operations"
+#endif
+}
+
 #endif
 
 #else
@@ -190,6 +288,11 @@ GIT_INLINE(int) git_atomic_dec(git_atomic *a)
 	return --a->val;
 }
 
+GIT_INLINE(int) git_atomic_get(git_atomic *a)
+{
+	return (int)a->val;
+}
+
 GIT_INLINE(void *) git___compare_and_swap(
 	void * volatile *ptr, void *oldval, void *newval)
 {
@@ -216,15 +319,20 @@ GIT_INLINE(int64_t) git_atomic64_add(git_atomic64 *a, int64_t addend)
 	return a->val;
 }
 
-#endif
-
-#endif
-
-GIT_INLINE(int) git_atomic_get(git_atomic *a)
+GIT_INLINE(void) git_atomic64_set(git_atomic64 *a, int64_t val)
 {
-	return (int)a->val;
+	a->val = val;
 }
 
+GIT_INLINE(int64_t) git_atomic64_get(git_atomic64 *a)
+{
+	return (int64_t)a->val;
+}
+
+#endif
+
+#endif
+
 /* Atomically replace oldval with newval
  * @return oldval if it was replaced or newval if it was not
  */
@@ -233,14 +341,24 @@ GIT_INLINE(int) git_atomic_get(git_atomic *a)
 
 #define git__swap(ptr, val) (void *)git___swap((void * volatile *)&ptr, val)
 
+#define git__load(ptr) (void *)git___load((void * volatile *)&ptr)
+
 extern int git_online_cpus(void);
 
-#if defined(GIT_THREADS) && defined(_MSC_VER)
-# define GIT_MEMORY_BARRIER MemoryBarrier()
-#elif defined(GIT_THREADS)
-# define GIT_MEMORY_BARRIER __sync_synchronize()
+#if defined(GIT_THREADS)
+
+# if defined(GIT_WIN32)
+#  define GIT_MEMORY_BARRIER MemoryBarrier()
+# elif defined(GIT_BUILTIN_ATOMIC)
+#  define GIT_MEMORY_BARRIER __atomic_thread_fence(__ATOMIC_SEQ_CST)
+# elif defined(GIT_BUILTIN_SYNC)
+#  define GIT_MEMORY_BARRIER __sync_synchronize()
+# endif
+
 #else
+
 # define GIT_MEMORY_BARRIER /* noop */
+
 #endif
 
 #endif
diff --git a/src/transaction.c b/src/transaction.c
index 7367d1240..81af8d831 100644
--- a/src/transaction.c
+++ b/src/transaction.c
@@ -76,7 +76,8 @@ int git_transaction_new(git_transaction **out, git_repository *repo)
 
 	assert(out && repo);
 
-	git_pool_init(&pool, 1);
+	if ((error = git_pool_init(&pool, 1)) < 0)
+		goto on_error;
 
 	tx = git_pool_mallocz(&pool, sizeof(git_transaction));
 	if (!tx) {
diff --git a/src/transports/credential.c b/src/transports/credential.c
index 0cf50a029..7b2836445 100644
--- a/src/transports/credential.c
+++ b/src/transports/credential.c
@@ -391,6 +391,7 @@ void git_credential_free(git_credential *cred)
 
 /* Deprecated credential functions */
 
+#ifndef GIT_DEPRECATE_HARD
 int git_cred_has_username(git_credential *cred)
 {
 	return git_credential_has_username(cred);
@@ -474,3 +475,4 @@ void git_cred_free(git_credential *cred)
 {
 	git_credential_free(cred);
 }
+#endif
diff --git a/src/transports/credential_helpers.c b/src/transports/credential_helpers.c
index 6b975e126..6d34a4e97 100644
--- a/src/transports/credential_helpers.c
+++ b/src/transports/credential_helpers.c
@@ -54,6 +54,7 @@ int git_credential_userpass(
 
 /* Deprecated credential functions */
 
+#ifndef GIT_DEPRECATE_HARD
 int git_cred_userpass(
 	git_credential **out,
 	const char *url,
@@ -64,3 +65,4 @@ int git_cred_userpass(
 	return git_credential_userpass(out, url, user_from_url,
 		allowed_types, payload);
 }
+#endif
diff --git a/src/transports/httpclient.c b/src/transports/httpclient.c
index 010baa604..ee936c81a 100644
--- a/src/transports/httpclient.c
+++ b/src/transports/httpclient.c
@@ -445,7 +445,7 @@ GIT_INLINE(int) client_write_request(git_http_client *client)
 				      0);
 }
 
-const char *name_for_method(git_http_method method)
+static const char *name_for_method(git_http_method method)
 {
 	switch (method) {
 	case GIT_HTTP_METHOD_GET:
@@ -1120,11 +1120,6 @@ GIT_INLINE(int) client_read_and_parse(git_http_client *client)
 		return -1;
 	}
 
-	if (parser->upgrade) {
-		git_error_set(GIT_ERROR_HTTP, "server requested upgrade");
-		return -1;
-	}
-
 	if (ctx->parse_status == PARSE_STATUS_ERROR) {
 		client->connected = 0;
 		return ctx->error ? ctx->error : -1;
@@ -1374,8 +1369,11 @@ int git_http_client_read_response(
 
 	git_http_response_dispose(response);
 
-	git_vector_free_deep(&client->server.auth_challenges);
-	git_vector_free_deep(&client->proxy.auth_challenges);
+	if (client->current_server == PROXY) {
+		git_vector_free_deep(&client->proxy.auth_challenges);
+	} else if(client->current_server == SERVER) {
+		git_vector_free_deep(&client->server.auth_challenges);
+	}
 
 	client->state = READING_RESPONSE;
 	client->keepalive = 0;
diff --git a/src/transports/local.c b/src/transports/local.c
index 24af7f063..210de9f74 100644
--- a/src/transports/local.c
+++ b/src/transports/local.c
@@ -185,12 +185,12 @@ static int store_refs(transport_local *t)
 	}
 
 	t->have_refs = 1;
-	git_strarray_free(&ref_names);
+	git_strarray_dispose(&ref_names);
 	return 0;
 
 on_error:
 	git_vector_free(&t->refs);
-	git_strarray_free(&ref_names);
+	git_strarray_dispose(&ref_names);
 	return -1;
 }
 
diff --git a/src/transports/smart.c b/src/transports/smart.c
index bb4d2a228..5f5919407 100644
--- a/src/transports/smart.c
+++ b/src/transports/smart.c
@@ -132,7 +132,7 @@ static int git_smart__set_custom_headers(
 	size_t i;
 
 	if (t->custom_headers.count)
-		git_strarray_free(&t->custom_headers);
+		git_strarray_dispose(&t->custom_headers);
 
 	if (!custom_headers)
 		return 0;
@@ -465,7 +465,7 @@ static void git_smart__free(git_transport *transport)
 	git_vector_free(refs);
 	git__free((char *)t->proxy.url);
 
-	git_strarray_free(&t->custom_headers);
+	git_strarray_dispose(&t->custom_headers);
 
 	git__free(t);
 }
diff --git a/src/transports/winhttp.c b/src/transports/winhttp.c
index ee8cb1543..f9736cd07 100644
--- a/src/transports/winhttp.c
+++ b/src/transports/winhttp.c
@@ -41,14 +41,18 @@
 #define WINHTTP_IGNORE_REQUEST_TOTAL_LENGTH 0
 #endif
 
-#ifndef WINHTTP_FLAG_SECURE_PROTOCOL_TLS_1_1
+#ifndef WINHTTP_FLAG_SECURE_PROTOCOL_TLS1_1
 # define WINHTTP_FLAG_SECURE_PROTOCOL_TLS1_1 0x00000200
 #endif
 
-#ifndef WINHTTP_FLAG_SECURE_PROTOCOL_TLS_1_2
+#ifndef WINHTTP_FLAG_SECURE_PROTOCOL_TLS1_2
 # define WINHTTP_FLAG_SECURE_PROTOCOL_TLS1_2 0x00000800
 #endif
 
+#ifndef WINHTTP_FLAG_SECURE_PROTOCOL_TLS1_3
+# define WINHTTP_FLAG_SECURE_PROTOCOL_TLS1_3 0x00002000
+#endif
+
 #ifndef HTTP_STATUS_PERMANENT_REDIRECT
 # define HTTP_STATUS_PERMANENT_REDIRECT 308
 #endif
@@ -743,7 +747,8 @@ static int winhttp_connect(
 	DWORD protocols =
 		WINHTTP_FLAG_SECURE_PROTOCOL_TLS1 |
 		WINHTTP_FLAG_SECURE_PROTOCOL_TLS1_1 |
-		WINHTTP_FLAG_SECURE_PROTOCOL_TLS1_2;
+		WINHTTP_FLAG_SECURE_PROTOCOL_TLS1_2 |
+		WINHTTP_FLAG_SECURE_PROTOCOL_TLS1_3;
 
 	t->session = NULL;
 	t->connection = NULL;
@@ -788,14 +793,20 @@ static int winhttp_connect(
 	}
 
 	/*
-	 * Do a best-effort attempt to enable TLS 1.2 but allow this to
-	 * fail; if TLS 1.2 support is not available for some reason,
+	 * Do a best-effort attempt to enable TLS 1.3 and 1.2 but allow this to
+	 * fail; if TLS 1.2 or 1.3 support is not available for some reason,
 	 * ignore the failure (it will keep the default protocols).
 	 */
-	WinHttpSetOption(t->session,
+	if (WinHttpSetOption(t->session,
 		WINHTTP_OPTION_SECURE_PROTOCOLS,
 		&protocols,
-		sizeof(protocols));
+		sizeof(protocols)) == FALSE) {
+		protocols &= ~WINHTTP_FLAG_SECURE_PROTOCOL_TLS1_3;
+		WinHttpSetOption(t->session,
+			WINHTTP_OPTION_SECURE_PROTOCOLS,
+			&protocols,
+			sizeof(protocols));
+	}
 
 	if (!WinHttpSetTimeouts(t->session, default_timeout, default_connect_timeout, default_timeout, default_timeout)) {
 		git_error_set(GIT_ERROR_OS, "failed to set timeouts for WinHTTP");
diff --git a/src/unix/posix.h b/src/unix/posix.h
index 4fa725013..b5527a4a8 100644
--- a/src/unix/posix.h
+++ b/src/unix/posix.h
@@ -62,11 +62,23 @@ GIT_INLINE(int) p_fsync(int fd)
 #define p_snprintf snprintf
 #define p_mkstemp(p) mkstemp(p)
 #define p_chdir(p) chdir(p)
-#define p_chmod(p,m) chmod(p, m)
 #define p_rmdir(p) rmdir(p)
 #define p_access(p,m) access(p,m)
 #define p_ftruncate(fd, sz) ftruncate(fd, sz)
 
+/*
+ * Pre-Android 5 did not implement a virtual filesystem atop FAT
+ * partitions for Unix permissions, which causes chmod to fail. However,
+ * Unix permissions have no effect on Android anyway as file permissions
+ * are not actually managed this way, so treating it as a no-op across
+ * all Android is safe.
+ */
+#ifdef __ANDROID__
+# define p_chmod(p,m) 0
+#else
+# define p_chmod(p,m) chmod(p, m)
+#endif
+
 /* see win32/posix.h for explanation about why this exists */
 #define p_lstat_posixly(p,b) lstat(p,b)
 
diff --git a/src/util.c b/src/util.c
index 859e0a82b..2efb212bc 100644
--- a/src/util.c
+++ b/src/util.c
@@ -22,52 +22,6 @@
 # include <Shlwapi.h>
 #endif
 
-void git_strarray_free(git_strarray *array)
-{
-	size_t i;
-
-	if (array == NULL)
-		return;
-
-	for (i = 0; i < array->count; ++i)
-		git__free(array->strings[i]);
-
-	git__free(array->strings);
-
-	memset(array, 0, sizeof(*array));
-}
-
-int git_strarray_copy(git_strarray *tgt, const git_strarray *src)
-{
-	size_t i;
-
-	assert(tgt && src);
-
-	memset(tgt, 0, sizeof(*tgt));
-
-	if (!src->count)
-		return 0;
-
-	tgt->strings = git__calloc(src->count, sizeof(char *));
-	GIT_ERROR_CHECK_ALLOC(tgt->strings);
-
-	for (i = 0; i < src->count; ++i) {
-		if (!src->strings[i])
-			continue;
-
-		tgt->strings[tgt->count] = git__strdup(src->strings[i]);
-		if (!tgt->strings[tgt->count]) {
-			git_strarray_free(tgt);
-			memset(tgt, 0, sizeof(*tgt));
-			return -1;
-		}
-
-		tgt->count++;
-	}
-
-	return 0;
-}
-
 int git__strntol64(int64_t *result, const char *nptr, size_t nptr_len, const char **endptr, int base)
 {
 	const char *p;
@@ -424,35 +378,48 @@ void git__hexdump(const char *buffer, size_t len)
 	last_line = (len % LINE_WIDTH);
 
 	for (i = 0; i < line_count; ++i) {
-		line = buffer + (i * LINE_WIDTH);
-		for (j = 0; j < LINE_WIDTH; ++j, ++line)
-			printf("%02X ", (unsigned char)*line & 0xFF);
+		printf("%08" PRIxZ "  ", (i * LINE_WIDTH));
 
-		printf("| ");
+		line = buffer + (i * LINE_WIDTH);
+		for (j = 0; j < LINE_WIDTH; ++j, ++line) {
+			printf("%02x ", (unsigned char)*line & 0xFF);
+
+			if (j == (LINE_WIDTH / 2))
+				printf(" ");
+		}
+
+		printf(" |");
 
 		line = buffer + (i * LINE_WIDTH);
 		for (j = 0; j < LINE_WIDTH; ++j, ++line)
 			printf("%c", (*line >= 32 && *line <= 126) ? *line : '.');
 
-		printf("\n");
+		printf("|\n");
 	}
 
 	if (last_line > 0) {
+		printf("%08" PRIxZ "  ", (line_count * LINE_WIDTH));
 
 		line = buffer + (line_count * LINE_WIDTH);
-		for (j = 0; j < last_line; ++j, ++line)
-			printf("%02X ", (unsigned char)*line & 0xFF);
+		for (j = 0; j < last_line; ++j, ++line) {
+			printf("%02x ", (unsigned char)*line & 0xFF);
 
+			if (j == (LINE_WIDTH / 2))
+				printf(" ");
+		}
+
+		if (j < (LINE_WIDTH / 2))
+			printf(" ");
 		for (j = 0; j < (LINE_WIDTH - last_line); ++j)
-			printf("	");
+			printf("   ");
 
-		printf("| ");
+		printf(" |");
 
 		line = buffer + (line_count * LINE_WIDTH);
 		for (j = 0; j < last_line; ++j, ++line)
 			printf("%c", (*line >= 32 && *line <= 126) ? *line : '.');
 
-		printf("\n");
+		printf("|\n");
 	}
 
 	printf("\n");
@@ -810,7 +777,7 @@ static const int8_t utf8proc_utf8class[256] = {
 	4, 4, 4, 4, 4, 4, 4, 4, 0, 0, 0, 0, 0, 0, 0, 0
 };
 
-int git__utf8_charlen(const uint8_t *str, size_t str_len)
+static int util_utf8_charlen(const uint8_t *str, size_t str_len)
 {
 	size_t length, i;
 
@@ -835,7 +802,7 @@ int git__utf8_iterate(const uint8_t *str, int str_len, int32_t *dst)
 	int32_t uc = -1;
 
 	*dst = -1;
-	length = git__utf8_charlen(str, str_len);
+	length = util_utf8_charlen(str, str_len);
 	if (length < 0)
 		return -1;
 
@@ -872,7 +839,7 @@ size_t git__utf8_valid_buf_length(const uint8_t *str, size_t str_len)
 	size_t offset = 0;
 
 	while (offset < str_len) {
-		int length = git__utf8_charlen(str + offset, str_len - offset);
+		int length = util_utf8_charlen(str + offset, str_len - offset);
 
 		if (length < 0)
 			break;
diff --git a/src/util.h b/src/util.h
index b49850d23..f49989f7e 100644
--- a/src/util.h
+++ b/src/util.h
@@ -186,10 +186,10 @@ typedef void (*git_refcount_freeptr)(void *r);
 }
 
 #define GIT_REFCOUNT_OWN(r, o) { \
-	(r)->rc.owner = o; \
+	(void)git__swap((r)->rc.owner, o); \
 }
 
-#define GIT_REFCOUNT_OWNER(r) ((r)->rc.owner)
+#define GIT_REFCOUNT_OWNER(r) git__load((r)->rc.owner)
 
 #define GIT_REFCOUNT_VAL(r) git_atomic_get((r)->rc.refcount)
 
diff --git a/src/win32/git2.rc b/src/win32/git2.rc
index 3571bc683..d273afd70 100644
--- a/src/win32/git2.rc
+++ b/src/win32/git2.rc
@@ -2,14 +2,29 @@
 #include "../../include/git2/version.h"
 
 #ifndef LIBGIT2_FILENAME
-# define LIBGIT2_FILENAME "git2"
+# ifdef __GNUC__
+#  define LIBGIT2_FILENAME git2
+# else
+#  define LIBGIT2_FILENAME "git2"
+# endif
 #endif
 
 #ifndef LIBGIT2_COMMENTS
 # define LIBGIT2_COMMENTS "For more information visit http://libgit2.github.com/"
 #endif
 
+#ifdef __GNUC__
+# define _STR(x) #x
+# define STR(x) _STR(x)
+#else
+# define STR(x) x
+#endif
+
+#ifdef __GNUC__
+VS_VERSION_INFO		VERSIONINFO
+#else
 VS_VERSION_INFO		VERSIONINFO	MOVEABLE IMPURE LOADONCALL DISCARDABLE
+#endif
   FILEVERSION		LIBGIT2_VER_MAJOR,LIBGIT2_VER_MINOR,LIBGIT2_VER_REVISION,LIBGIT2_VER_PATCH
   PRODUCTVERSION	LIBGIT2_VER_MAJOR,LIBGIT2_VER_MINOR,LIBGIT2_VER_REVISION,LIBGIT2_VER_PATCH
   FILEFLAGSMASK		VS_FFI_FILEFLAGSMASK
@@ -29,9 +44,9 @@ BEGIN
     BEGIN
       VALUE "FileDescription",	"libgit2 - the Git linkable library\0"
       VALUE "FileVersion",	LIBGIT2_VERSION "\0"
-      VALUE "InternalName",	LIBGIT2_FILENAME ".dll\0"
+      VALUE "InternalName",	STR(LIBGIT2_FILENAME) ".dll\0"
       VALUE "LegalCopyright",	"Copyright (C) the libgit2 contributors. All rights reserved.\0"
-      VALUE "OriginalFilename",	LIBGIT2_FILENAME ".dll\0"
+      VALUE "OriginalFilename",	STR(LIBGIT2_FILENAME) ".dll\0"
       VALUE "ProductName",	"libgit2\0"
       VALUE "ProductVersion",	LIBGIT2_VERSION "\0"
       VALUE "Comments",		LIBGIT2_COMMENTS "\0"
diff --git a/src/win32/path_w32.c b/src/win32/path_w32.c
index 18b43e728..9faddcf3b 100644
--- a/src/win32/path_w32.c
+++ b/src/win32/path_w32.c
@@ -151,7 +151,7 @@ int git_win32_path_canonicalize(git_win32_path path)
 	return (int)(to - path);
 }
 
-int git_win32_path__cwd(wchar_t *out, size_t len)
+static int win32_path_cwd(wchar_t *out, size_t len)
 {
 	int cwd_len;
 
@@ -241,7 +241,7 @@ int git_win32_path_from_utf8(git_win32_path out, const char *src)
 	else {
 		int cwd_len;
 
-		if ((cwd_len = git_win32_path__cwd(dest, MAX_PATH)) < 0)
+		if ((cwd_len = win32_path_cwd(dest, MAX_PATH)) < 0)
 			goto on_error;
 
 		dest[cwd_len++] = L'\\';
diff --git a/src/worktree.c b/src/worktree.c
index 74b32f97c..fda9b0b71 100644
--- a/src/worktree.c
+++ b/src/worktree.c
@@ -271,11 +271,13 @@ int git_worktree_add_options_init(git_worktree_add_options *opts,
 	return 0;
 }
 
+#ifndef GIT_DEPRECATE_HARD
 int git_worktree_add_init_options(git_worktree_add_options *opts,
 	unsigned int version)
 {
 	return git_worktree_add_options_init(opts, version);
 }
+#endif
 
 int git_worktree_add(git_worktree **out, git_repository *repo,
 	const char *name, const char *worktree,
@@ -506,11 +508,13 @@ int git_worktree_prune_options_init(
 	return 0;
 }
 
+#ifndef GIT_DEPRECATE_HARD
 int git_worktree_prune_init_options(git_worktree_prune_options *opts,
 	unsigned int version)
 {
 	return git_worktree_prune_options_init(opts, version);
 }
+#endif
 
 int git_worktree_is_prunable(git_worktree *wt,
 	git_worktree_prune_options *opts)
diff --git a/tests/blame/simple.c b/tests/blame/simple.c
index 16e7bc400..6b13cccd4 100644
--- a/tests/blame/simple.c
+++ b/tests/blame/simple.c
@@ -238,6 +238,24 @@ void test_blame_simple__can_restrict_lines_min(void)
 	check_blame_hunk_index(g_repo, g_blame, 1, 11, 5, 0, "aa06ecca", "b.txt");
 }
 
+/*
+ * $ git blame -n c.txt
+ *    orig line no                          final line no
+ * commit    V  author      timestamp                  V
+ * 702c7aa5  1 (Carl Schwan 2020-01-29 01:52:31 +0100  4
+ */
+void test_blame_simple__can_ignore_whitespace_change(void)
+{
+	git_blame_options opts = GIT_BLAME_OPTIONS_INIT;
+
+	cl_git_pass(git_repository_open(&g_repo, cl_fixture("blametest.git")));
+
+	opts.flags |= GIT_BLAME_IGNORE_WHITESPACE;
+	cl_git_pass(git_blame_file(&g_blame, g_repo, "c.txt", &opts));
+	cl_assert_equal_i(1, git_blame_get_hunk_count(g_blame));
+	check_blame_hunk_index(g_repo, g_blame, 0,  1, 4, 0, "702c7aa5", "c.txt");
+}
+
 /*
  * $ git blame -n b.txt -L ,6
  *    orig line no                          final line no
diff --git a/tests/checkout/crlf.c b/tests/checkout/crlf.c
index 65e13a6fd..495020161 100644
--- a/tests/checkout/crlf.c
+++ b/tests/checkout/crlf.c
@@ -108,7 +108,7 @@ done:
 		git_buf details = GIT_BUF_INIT;
 		git_buf_printf(&details, "filename=%s, system=%s, autocrlf=%s, attrs={%s}",
 			git_path_basename(actual_path->ptr), systype, cd->autocrlf, cd->attrs);
-		clar__fail(__FILE__, __LINE__,
+		clar__fail(__FILE__, __func__, __LINE__,
 			"checked out contents did not match expected", details.ptr, 0);
 		git_buf_dispose(&details);
 	}
diff --git a/tests/checkout/head.c b/tests/checkout/head.c
index 799123086..5b3a034e7 100644
--- a/tests/checkout/head.c
+++ b/tests/checkout/head.c
@@ -109,6 +109,32 @@ void test_checkout_head__do_not_remove_untracked_file_in_subdir(void)
 	cl_assert(git_path_isfile("testrepo/tracked/subdir/untracked"));
 }
 
+void test_checkout_head__do_remove_untracked_paths(void)
+{
+	git_checkout_options opts = GIT_CHECKOUT_OPTIONS_INIT;
+	git_index *index;
+	char *paths[] = {"tracked/untracked"};
+
+	cl_git_pass(p_mkdir("testrepo/tracked", 0755));
+	cl_git_pass(p_mkdir("testrepo/tracked/subdir", 0755));
+	cl_git_mkfile("testrepo/tracked/tracked", "tracked\n");
+	cl_git_mkfile("testrepo/tracked/untracked", "untracked\n");
+
+	cl_git_pass(git_repository_index(&index, g_repo));
+	cl_git_pass(git_index_add_bypath(index, "tracked/tracked"));
+	cl_git_pass(git_index_write(index));
+
+	git_index_free(index);
+
+	opts.checkout_strategy = GIT_CHECKOUT_FORCE | GIT_CHECKOUT_REMOVE_UNTRACKED;
+	opts.paths.strings = paths;
+	opts.paths.count = 1;
+	cl_git_pass(git_checkout_head(g_repo, &opts));
+
+	cl_assert(git_path_isfile("testrepo/tracked/tracked"));
+	cl_assert(!git_path_isfile("testrepo/tracked/untracked"));
+}
+
 void test_checkout_head__do_remove_tracked_subdir(void)
 {
 	git_checkout_options opts = GIT_CHECKOUT_OPTIONS_INIT;
diff --git a/tests/checkout/index.c b/tests/checkout/index.c
index a76c471e8..508975365 100644
--- a/tests/checkout/index.c
+++ b/tests/checkout/index.c
@@ -89,6 +89,61 @@ void test_checkout_index__can_remove_untracked_files(void)
 	cl_assert_equal_i(false, git_path_isdir("./testrepo/dir"));
 }
 
+void test_checkout_index__can_disable_pathspec_match(void)
+{
+	char *files_to_checkout[] = { "test10.txt", "test11.txt"};
+	git_checkout_options opts = GIT_CHECKOUT_OPTIONS_INIT;
+	git_object *objects;
+	git_index *index;
+
+	/* reset to beginning of history (i.e. just a README file) */
+	opts.checkout_strategy = GIT_CHECKOUT_FORCE | GIT_CHECKOUT_REMOVE_UNTRACKED;
+
+	cl_git_pass(git_revparse_single(&objects, g_repo, "8496071c1b46c854b31185ea97743be6a8774479"));
+	cl_git_pass(git_checkout_tree(g_repo, objects, &opts));
+	cl_git_pass(git_repository_set_head_detached(g_repo, git_object_id(objects)));
+	git_object_free(objects);
+
+	cl_git_pass(git_repository_index(&index, g_repo));
+
+	/* We create 4 files and commit them */
+	cl_git_mkfile("testrepo/test9.txt", "original\n");
+	cl_git_mkfile("testrepo/test10.txt", "original\n");
+	cl_git_mkfile("testrepo/test11.txt", "original\n");
+	cl_git_mkfile("testrepo/test12.txt", "original\n");
+
+	cl_git_pass(git_index_add_bypath(index, "test9.txt"));
+	cl_git_pass(git_index_add_bypath(index, "test10.txt"));
+	cl_git_pass(git_index_add_bypath(index, "test11.txt"));
+	cl_git_pass(git_index_add_bypath(index, "test12.txt"));
+	cl_git_pass(git_index_write(index));
+
+	cl_repo_commit_from_index(NULL, g_repo, NULL, 0, "commit our test files");
+
+	/* We modify the content of all 4 of our files */
+	cl_git_rewritefile("testrepo/test9.txt", "modified\n");
+	cl_git_rewritefile("testrepo/test10.txt", "modified\n");
+	cl_git_rewritefile("testrepo/test11.txt", "modified\n");
+	cl_git_rewritefile("testrepo/test12.txt", "modified\n");
+
+	/* We checkout only test10.txt and test11.txt */
+	opts.checkout_strategy =
+		GIT_CHECKOUT_FORCE |
+		GIT_CHECKOUT_DISABLE_PATHSPEC_MATCH;
+	opts.paths.strings = files_to_checkout;
+	opts.paths.count = ARRAY_SIZE(files_to_checkout);
+	cl_git_pass(git_checkout_index(g_repo, NULL, &opts));
+
+	/* The only files that have been reverted to their original content
+	   should be test10.txt and test11.txt */
+	check_file_contents("testrepo/test9.txt", "modified\n");
+	check_file_contents("testrepo/test10.txt", "original\n");
+	check_file_contents("testrepo/test11.txt", "original\n");
+	check_file_contents("testrepo/test12.txt", "modified\n");
+
+	git_index_free(index);
+}
+
 void test_checkout_index__honor_the_specified_pathspecs(void)
 {
 	git_checkout_options opts = GIT_CHECKOUT_OPTIONS_INIT;
diff --git a/tests/checkout/tree.c b/tests/checkout/tree.c
index 380d25101..f8d9abe55 100644
--- a/tests/checkout/tree.c
+++ b/tests/checkout/tree.c
@@ -917,7 +917,7 @@ void test_checkout_tree__extremely_long_file_name(void)
 {
 	/* A utf-8 string with 83 characters, but 249 bytes. */
 	const char *longname = "\xe5\x8f\x97\xe5\x8f\x97\xe5\x8f\x97\xe5\x8f\x97\xe5\x8f\x97\xe5\x8f\x97\xe5\x8f\x97\xe5\x8f\x97\xe5\x8f\x97\xe5\x8f\x97\xe5\x8f\x97\xe5\x8f\x97\xe5\x8f\x97\xe5\x8f\x97\xe5\x8f\x97\xe5\x8f\x97\xe5\x8f\x97\xe5\x8f\x97\xe5\x8f\x97\xe5\x8f\x97\xe5\x8f\x97\xe5\x8f\x97\xe5\x8f\x97\xe5\x8f\x97\xe5\x8f\x97\xe5\x8f\x97\xe5\x8f\x97\xe5\x8f\x97\xe5\x8f\x97\xe5\x8f\x97\xe5\x8f\x97\xe5\x8f\x97\xe5\x8f\x97\xe5\x8f\x97\xe5\x8f\x97\xe5\x8f\x97\xe5\x8f\x97\xe5\x8f\x97\xe5\x8f\x97\xe5\x8f\x97\xe5\x8f\x97\xe5\x8f\x97\xe5\x8f\x97\xe5\x8f\x97\xe5\x8f\x97\xe5\x8f\x97\xe5\x8f\x97\xe5\x8f\x97\xe5\x8f\x97\xe5\x8f\x97\xe5\x8f\x97\xe5\x8f\x97\xe5\x8f\x97\xe5\x8f\x97\xe5\x8f\x97\xe5\x8f\x97\xe5\x8f\x97\xe5\x8f\x97\xe5\x8f\x97\xe5\x8f\x97\xe5\x8f\x97\xe5\x8f\x97\xe5\x8f\x97\xe5\x8f\x97\xe5\x8f\x97\xe5\x8f\x97\xe5\x8f\x97\xe5\x8f\x97\xe5\x8f\x97\xe5\x8f\x97\xe5\x8f\x97\xe5\x8f\x97\xe5\x8f\x97\xe5\x8f\x97\xe5\x8f\x97\xe5\x8f\x97\xe5\x8f\x97\xe5\x8f\x97\xe5\x8f\x97\xe5\x8f\x97\xe5\x8f\x97\xe5\x8f\x97\xe5\x8f\x97";
-	char path[1024];
+	char path[1024] = {0};
 
 	g_opts.checkout_strategy = GIT_CHECKOUT_FORCE;
 	cl_git_pass(git_revparse_single(&g_object, g_repo, "long-file-name"));
diff --git a/tests/clar.c b/tests/clar.c
index ead13f46a..ca508d073 100644
--- a/tests/clar.c
+++ b/tests/clar.c
@@ -96,6 +96,7 @@ fixture_path(const char *base, const char *fixture_name);
 
 struct clar_error {
 	const char *file;
+	const char *function;
 	size_t line_number;
 	const char *error_msg;
 	char *description;
@@ -140,6 +141,8 @@ static struct {
 	int tests_ran;
 	int suites_ran;
 
+	enum cl_output_format output_format;
+
 	int report_errors_only;
 	int exit_on_error;
 	int report_suite_names;
@@ -293,6 +296,7 @@ clar_run_suite(const struct clar_suite *suite, const char *filter)
 	const struct clar_func *test = suite->tests;
 	size_t i, matchlen;
 	struct clar_report *report;
+	int exact = 0;
 
 	if (!suite->enabled)
 		return;
@@ -317,6 +321,11 @@ clar_run_suite(const struct clar_suite *suite, const char *filter)
 			while (*filter == ':')
 				++filter;
 			matchlen = strlen(filter);
+
+			if (matchlen && filter[matchlen - 1] == '$') {
+				exact = 1;
+				matchlen--;
+			}
 		}
 	}
 
@@ -324,6 +333,9 @@ clar_run_suite(const struct clar_suite *suite, const char *filter)
 		if (filter && strncmp(test[i].name, filter, matchlen))
 			continue;
 
+		if (exact && strlen(test[i].name) != matchlen)
+			continue;
+
 		_clar.active_test = test[i].name;
 
 		report = calloc(1, sizeof(struct clar_report));
@@ -361,6 +373,7 @@ clar_usage(const char *arg)
 	printf("  -v            Increase verbosity (show suite names)\n");
 	printf("  -q            Only report tests that had an error\n");
 	printf("  -Q            Quit as soon as a test fails\n");
+	printf("  -t            Display results in tap format\n");
 	printf("  -l            Print suite names\n");
 	printf("  -r[filename]  Write summary file (to the optional filename)\n");
 	exit(-1);
@@ -376,7 +389,7 @@ clar_parse_args(int argc, char **argv)
 		char *argument = argv[i];
 
 		if (argument[0] != '-' || argument[1] == '\0'
-		    || strchr("sixvqQlr", argument[1]) == NULL) {
+		    || strchr("sixvqQtlr", argument[1]) == NULL) {
 			clar_usage(argv[0]);
 		}
 	}
@@ -459,6 +472,10 @@ clar_parse_args(int argc, char **argv)
 			_clar.exit_on_error = 1;
 			break;
 
+		case 't':
+			_clar.output_format = CL_OUTPUT_TAP;
+			break;
+
 		case 'l': {
 			size_t j;
 			printf("Test suites (use -s<name> to run just one):\n");
@@ -487,6 +504,9 @@ clar_parse_args(int argc, char **argv)
 void
 clar_test_init(int argc, char **argv)
 {
+	if (argc > 1)
+		clar_parse_args(argc, argv);
+
 	clar_print_init(
 		(int)_clar_callback_count,
 		(int)_clar_suite_count,
@@ -498,9 +518,6 @@ clar_test_init(int argc, char **argv)
 		_clar.summary_filename = strdup(_clar.summary_filename);
 	}
 
-	if (argc > 1)
-		clar_parse_args(argc, argv);
-
 	if (_clar.write_summary &&
 	    !(_clar.summary = clar_summary_init(_clar.summary_filename))) {
 		clar_print_onabort("Failed to open the summary file\n");
@@ -596,6 +613,7 @@ void clar__skip(void)
 
 void clar__fail(
 	const char *file,
+	const char *function,
 	size_t line,
 	const char *error_msg,
 	const char *description,
@@ -612,6 +630,7 @@ void clar__fail(
 	_clar.last_report->last_error = error;
 
 	error->file = file;
+	error->function = function;
 	error->line_number = line;
 	error->error_msg = error_msg;
 
@@ -628,6 +647,7 @@ void clar__fail(
 void clar__assert(
 	int condition,
 	const char *file,
+	const char *function,
 	size_t line,
 	const char *error_msg,
 	const char *description,
@@ -636,11 +656,12 @@ void clar__assert(
 	if (condition)
 		return;
 
-	clar__fail(file, line, error_msg, description, should_abort);
+	clar__fail(file, function, line, error_msg, description, should_abort);
 }
 
 void clar__assert_equal(
 	const char *file,
+	const char *function,
 	size_t line,
 	const char *err,
 	int should_abort,
@@ -751,7 +772,7 @@ void clar__assert_equal(
 	va_end(args);
 
 	if (!is_equal)
-		clar__fail(file, line, err, buf, should_abort);
+		clar__fail(file, function, line, err, buf, should_abort);
 }
 
 void cl_set_cleanup(void (*cleanup)(void *), void *opaque)
diff --git a/tests/clar.h b/tests/clar.h
index 20ff4c895..8c22382bd 100644
--- a/tests/clar.h
+++ b/tests/clar.h
@@ -16,6 +16,11 @@ enum cl_test_status {
 	CL_TEST_NOTRUN,
 };
 
+enum cl_output_format {
+	CL_OUTPUT_CLAP,
+	CL_OUTPUT_TAP,
+};
+
 /** Setup clar environment */
 void clar_test_init(int argc, char *argv[]);
 int clar_test_run(void);
@@ -81,16 +86,16 @@ const char *cl_fixture_basename(const char *fixture_name);
 /**
  * Assertion macros with explicit error message
  */
-#define cl_must_pass_(expr, desc) clar__assert((expr) >= 0, __FILE__, __LINE__, "Function call failed: " #expr, desc, 1)
-#define cl_must_fail_(expr, desc) clar__assert((expr) < 0, __FILE__, __LINE__, "Expected function call to fail: " #expr, desc, 1)
-#define cl_assert_(expr, desc) clar__assert((expr) != 0, __FILE__, __LINE__, "Expression is not true: " #expr, desc, 1)
+#define cl_must_pass_(expr, desc) clar__assert((expr) >= 0, __FILE__, __func__, __LINE__, "Function call failed: " #expr, desc, 1)
+#define cl_must_fail_(expr, desc) clar__assert((expr) < 0, __FILE__, __func__, __LINE__, "Expected function call to fail: " #expr, desc, 1)
+#define cl_assert_(expr, desc) clar__assert((expr) != 0, __FILE__, __func__, __LINE__, "Expression is not true: " #expr, desc, 1)
 
 /**
  * Check macros with explicit error message
  */
-#define cl_check_pass_(expr, desc) clar__assert((expr) >= 0, __FILE__, __LINE__, "Function call failed: " #expr, desc, 0)
-#define cl_check_fail_(expr, desc) clar__assert((expr) < 0, __FILE__, __LINE__, "Expected function call to fail: " #expr, desc, 0)
-#define cl_check_(expr, desc) clar__assert((expr) != 0, __FILE__, __LINE__, "Expression is not true: " #expr, desc, 0)
+#define cl_check_pass_(expr, desc) clar__assert((expr) >= 0, __FILE__, __func__, __LINE__, "Function call failed: " #expr, desc, 0)
+#define cl_check_fail_(expr, desc) clar__assert((expr) < 0, __FILE__, __func__, __LINE__, "Expected function call to fail: " #expr, desc, 0)
+#define cl_check_(expr, desc) clar__assert((expr) != 0, __FILE__, __func__, __LINE__, "Expression is not true: " #expr, desc, 0)
 
 /**
  * Assertion macros with no error message
@@ -109,38 +114,39 @@ const char *cl_fixture_basename(const char *fixture_name);
 /**
  * Forced failure/warning
  */
-#define cl_fail(desc) clar__fail(__FILE__, __LINE__, "Test failed.", desc, 1)
-#define cl_warning(desc) clar__fail(__FILE__, __LINE__, "Warning during test execution:", desc, 0)
+#define cl_fail(desc) clar__fail(__FILE__, __func__, __LINE__, "Test failed.", desc, 1)
+#define cl_warning(desc) clar__fail(__FILE__, __func__, __LINE__, "Warning during test execution:", desc, 0)
 
 #define cl_skip() clar__skip()
 
 /**
  * Typed assertion macros
  */
-#define cl_assert_equal_s(s1,s2) clar__assert_equal(__FILE__,__LINE__,"String mismatch: " #s1 " != " #s2, 1, "%s", (s1), (s2))
-#define cl_assert_equal_s_(s1,s2,note) clar__assert_equal(__FILE__,__LINE__,"String mismatch: " #s1 " != " #s2 " (" #note ")", 1, "%s", (s1), (s2))
+#define cl_assert_equal_s(s1,s2) clar__assert_equal(__FILE__,__func__,__LINE__,"String mismatch: " #s1 " != " #s2, 1, "%s", (s1), (s2))
+#define cl_assert_equal_s_(s1,s2,note) clar__assert_equal(__FILE__,__func__,__LINE__,"String mismatch: " #s1 " != " #s2 " (" #note ")", 1, "%s", (s1), (s2))
 
-#define cl_assert_equal_wcs(wcs1,wcs2) clar__assert_equal(__FILE__,__LINE__,"String mismatch: " #wcs1 " != " #wcs2, 1, "%ls", (wcs1), (wcs2))
-#define cl_assert_equal_wcs_(wcs1,wcs2,note) clar__assert_equal(__FILE__,__LINE__,"String mismatch: " #wcs1 " != " #wcs2 " (" #note ")", 1, "%ls", (wcs1), (wcs2))
+#define cl_assert_equal_wcs(wcs1,wcs2) clar__assert_equal(__FILE__,__func__,__LINE__,"String mismatch: " #wcs1 " != " #wcs2, 1, "%ls", (wcs1), (wcs2))
+#define cl_assert_equal_wcs_(wcs1,wcs2,note) clar__assert_equal(__FILE__,__func__,__LINE__,"String mismatch: " #wcs1 " != " #wcs2 " (" #note ")", 1, "%ls", (wcs1), (wcs2))
 
-#define cl_assert_equal_strn(s1,s2,len) clar__assert_equal(__FILE__,__LINE__,"String mismatch: " #s1 " != " #s2, 1, "%.*s", (s1), (s2), (int)(len))
-#define cl_assert_equal_strn_(s1,s2,len,note) clar__assert_equal(__FILE__,__LINE__,"String mismatch: " #s1 " != " #s2 " (" #note ")", 1, "%.*s", (s1), (s2), (int)(len))
+#define cl_assert_equal_strn(s1,s2,len) clar__assert_equal(__FILE__,__func__,__LINE__,"String mismatch: " #s1 " != " #s2, 1, "%.*s", (s1), (s2), (int)(len))
+#define cl_assert_equal_strn_(s1,s2,len,note) clar__assert_equal(__FILE__,__func__,__LINE__,"String mismatch: " #s1 " != " #s2 " (" #note ")", 1, "%.*s", (s1), (s2), (int)(len))
 
-#define cl_assert_equal_wcsn(wcs1,wcs2,len) clar__assert_equal(__FILE__,__LINE__,"String mismatch: " #wcs1 " != " #wcs2, 1, "%.*ls", (wcs1), (wcs2), (int)(len))
-#define cl_assert_equal_wcsn_(wcs1,wcs2,len,note) clar__assert_equal(__FILE__,__LINE__,"String mismatch: " #wcs1 " != " #wcs2 " (" #note ")", 1, "%.*ls", (wcs1), (wcs2), (int)(len))
+#define cl_assert_equal_wcsn(wcs1,wcs2,len) clar__assert_equal(__FILE__,__func__,__LINE__,"String mismatch: " #wcs1 " != " #wcs2, 1, "%.*ls", (wcs1), (wcs2), (int)(len))
+#define cl_assert_equal_wcsn_(wcs1,wcs2,len,note) clar__assert_equal(__FILE__,__func__,__LINE__,"String mismatch: " #wcs1 " != " #wcs2 " (" #note ")", 1, "%.*ls", (wcs1), (wcs2), (int)(len))
 
-#define cl_assert_equal_i(i1,i2) clar__assert_equal(__FILE__,__LINE__,#i1 " != " #i2, 1, "%d", (int)(i1), (int)(i2))
-#define cl_assert_equal_i_(i1,i2,note) clar__assert_equal(__FILE__,__LINE__,#i1 " != " #i2 " (" #note ")", 1, "%d", (i1), (i2))
-#define cl_assert_equal_i_fmt(i1,i2,fmt) clar__assert_equal(__FILE__,__LINE__,#i1 " != " #i2, 1, (fmt), (int)(i1), (int)(i2))
+#define cl_assert_equal_i(i1,i2) clar__assert_equal(__FILE__,__func__,__LINE__,#i1 " != " #i2, 1, "%d", (int)(i1), (int)(i2))
+#define cl_assert_equal_i_(i1,i2,note) clar__assert_equal(__FILE__,__func__,__LINE__,#i1 " != " #i2 " (" #note ")", 1, "%d", (i1), (i2))
+#define cl_assert_equal_i_fmt(i1,i2,fmt) clar__assert_equal(__FILE__,__func__,__LINE__,#i1 " != " #i2, 1, (fmt), (int)(i1), (int)(i2))
 
-#define cl_assert_equal_b(b1,b2) clar__assert_equal(__FILE__,__LINE__,#b1 " != " #b2, 1, "%d", (int)((b1) != 0),(int)((b2) != 0))
+#define cl_assert_equal_b(b1,b2) clar__assert_equal(__FILE__,__func__,__LINE__,#b1 " != " #b2, 1, "%d", (int)((b1) != 0),(int)((b2) != 0))
 
-#define cl_assert_equal_p(p1,p2) clar__assert_equal(__FILE__,__LINE__,"Pointer mismatch: " #p1 " != " #p2, 1, "%p", (p1), (p2))
+#define cl_assert_equal_p(p1,p2) clar__assert_equal(__FILE__,__func__,__LINE__,"Pointer mismatch: " #p1 " != " #p2, 1, "%p", (p1), (p2))
 
 void clar__skip(void);
 
 void clar__fail(
 	const char *file,
+	const char *func,
 	size_t line,
 	const char *error,
 	const char *description,
@@ -149,6 +155,7 @@ void clar__fail(
 void clar__assert(
 	int condition,
 	const char *file,
+	const char *func,
 	size_t line,
 	const char *error,
 	const char *description,
@@ -156,6 +163,7 @@ void clar__assert(
 
 void clar__assert_equal(
 	const char *file,
+	const char *func,
 	size_t line,
 	const char *err,
 	int should_abort,
diff --git a/tests/clar/fs.h b/tests/clar/fs.h
index 7c7dde6fc..31a536427 100644
--- a/tests/clar/fs.h
+++ b/tests/clar/fs.h
@@ -1,3 +1,11 @@
+/*
+ * By default, use a read/write loop to copy files on POSIX systems.
+ * On Linux, use sendfile by default as it's slightly faster.  On
+ * macOS, we avoid fcopyfile by default because it's slightly slower.
+ */
+#undef USE_FCOPYFILE
+#define USE_SENDFILE 1
+
 #ifdef _WIN32
 
 #define RM_RETRY_COUNT	5
@@ -254,74 +262,213 @@ cl_fs_cleanup(void)
 
 #include <errno.h>
 #include <string.h>
+#include <limits.h>
+#include <dirent.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <sys/types.h>
+#include <sys/stat.h>
 
-static int
-shell_out(char * const argv[])
+#if defined(__linux__)
+# include <sys/sendfile.h>
+#endif
+
+#if defined(__APPLE__)
+# include <copyfile.h>
+#endif
+
+static void basename_r(const char **out, int *out_len, const char *in)
 {
-	int status, piderr;
-	pid_t pid;
+	size_t in_len = strlen(in), start_pos;
 
-	pid = fork();
-
-	if (pid < 0) {
-		fprintf(stderr,
-			"System error: `fork()` call failed (%d) - %s\n",
-			errno, strerror(errno));
-		exit(-1);
+	for (in_len = strlen(in); in_len; in_len--) {
+		if (in[in_len - 1] != '/')
+			break;
 	}
 
-	if (pid == 0) {
-		execv(argv[0], argv);
+	for (start_pos = in_len; start_pos; start_pos--) {
+		if (in[start_pos - 1] == '/')
+			break;
 	}
 
-	do {
-		piderr = waitpid(pid, &status, WUNTRACED);
-	} while (piderr < 0 && (errno == EAGAIN || errno == EINTR));
+	cl_assert(in_len - start_pos < INT_MAX);
 
-	return WEXITSTATUS(status);
+	if (in_len - start_pos > 0) {
+		*out = &in[start_pos];
+		*out_len = (in_len - start_pos);
+	} else {
+		*out = "/";
+		*out_len = 1;
+	}
+}
+
+static char *joinpath(const char *dir, const char *base, int base_len)
+{
+	char *out;
+	int len;
+
+	if (base_len == -1) {
+		size_t bl = strlen(base);
+
+		cl_assert(bl < INT_MAX);
+		base_len = (int)bl;
+	}
+
+	len = strlen(dir) + base_len + 2;
+	cl_assert(len > 0);
+
+	cl_assert(out = malloc(len));
+	cl_assert(snprintf(out, len, "%s/%.*s", dir, base_len, base) < len);
+
+	return out;
 }
 
 static void
-fs_copy(const char *_source, const char *dest)
+fs_copydir_helper(const char *source, const char *dest, int dest_mode)
 {
-	char *argv[5];
-	char *source;
-	size_t source_len;
+	DIR *source_dir;
+	struct dirent *d;
 
-	source = strdup(_source);
-	source_len = strlen(source);
+	mkdir(dest, dest_mode);
 
-	if (source[source_len - 1] == '/')
-		source[source_len - 1] = 0;
+	cl_assert_(source_dir = opendir(source), "Could not open source dir");
+	while ((d = (errno = 0, readdir(source_dir))) != NULL) {
+		char *child;
 
-	argv[0] = "/bin/cp";
-	argv[1] = "-R";
-	argv[2] = source;
-	argv[3] = (char *)dest;
-	argv[4] = NULL;
+		if (!strcmp(d->d_name, ".") || !strcmp(d->d_name, ".."))
+			continue;
 
-	cl_must_pass_(
-		shell_out(argv),
-		"Failed to copy test fixtures to sandbox"
-	);
+		child = joinpath(source, d->d_name, -1);
+		fs_copy(child, dest);
+		free(child);
+	}
 
-	free(source);
+	cl_assert_(errno == 0, "Failed to iterate source dir");
+
+	closedir(source_dir);
 }
 
 static void
-fs_rm(const char *source)
+fs_copyfile_helper(const char *source, size_t source_len, const char *dest, int dest_mode)
 {
-	char *argv[4];
+	int in, out;
 
-	argv[0] = "/bin/rm";
-	argv[1] = "-Rf";
-	argv[2] = (char *)source;
-	argv[3] = NULL;
+	cl_must_pass((in = open(source, O_RDONLY)));
+	cl_must_pass((out = open(dest, O_WRONLY|O_CREAT|O_TRUNC, dest_mode)));
 
-	cl_must_pass_(
-		shell_out(argv),
-		"Failed to cleanup the sandbox"
-	);
+#if USE_FCOPYFILE && defined(__APPLE__)
+	((void)(source_len)); /* unused */
+	cl_must_pass(fcopyfile(in, out, 0, COPYFILE_DATA));
+#elif USE_SENDFILE && defined(__linux__)
+	{
+		ssize_t ret = 0;
+
+		while (source_len && (ret = sendfile(out, in, NULL, source_len)) > 0) {
+			source_len -= (size_t)ret;
+		}
+		cl_assert(ret >= 0);
+	}
+#else
+	{
+		char buf[131072];
+		ssize_t ret;
+
+		((void)(source_len)); /* unused */
+
+		while ((ret = read(in, buf, sizeof(buf))) > 0) {
+			size_t len = (size_t)ret;
+
+			while (len && (ret = write(out, buf, len)) > 0) {
+				cl_assert(ret <= (ssize_t)len);
+				len -= ret;
+			}
+			cl_assert(ret >= 0);
+		}
+		cl_assert(ret == 0);
+	}
+#endif
+
+	close(in);
+	close(out);
+}
+
+static void
+fs_copy(const char *source, const char *_dest)
+{
+	char *dbuf = NULL;
+	const char *dest;
+	struct stat source_st, dest_st;
+
+	cl_must_pass_(lstat(source, &source_st), "Failed to stat copy source");
+
+	if (lstat(_dest, &dest_st) == 0) {
+		const char *base;
+		int base_len;
+
+		/* Target exists and is directory; append basename */
+		cl_assert(S_ISDIR(dest_st.st_mode));
+
+		basename_r(&base, &base_len, source);
+		cl_assert(base_len < INT_MAX);
+
+		dbuf = joinpath(_dest, base, base_len);
+		dest = dbuf;
+	} else if (errno != ENOENT) {
+		cl_fail("Cannot copy; cannot stat destination");
+	} else {
+		dest = _dest;
+	}
+
+	if (S_ISDIR(source_st.st_mode)) {
+		fs_copydir_helper(source, dest, source_st.st_mode);
+	} else {
+		fs_copyfile_helper(source, source_st.st_size, dest, source_st.st_mode);
+	}
+
+	free(dbuf);
+}
+
+static void
+fs_rmdir_helper(const char *path)
+{
+	DIR *dir;
+	struct dirent *d;
+
+	cl_assert_(dir = opendir(path), "Could not open dir");
+	while ((d = (errno = 0, readdir(dir))) != NULL) {
+		char *child;
+
+		if (!strcmp(d->d_name, ".") || !strcmp(d->d_name, ".."))
+			continue;
+
+		child = joinpath(path, d->d_name, -1);
+		fs_rm(child);
+		free(child);
+	}
+
+	cl_assert_(errno == 0, "Failed to iterate source dir");
+	closedir(dir);
+
+	cl_must_pass_(rmdir(path), "Could not remove directory");
+}
+
+static void
+fs_rm(const char *path)
+{
+	struct stat st;
+
+	if (lstat(path, &st)) {
+		if (errno == ENOENT)
+			return;
+
+		cl_fail("Cannot copy; cannot stat destination");
+	}
+
+	if (S_ISDIR(st.st_mode)) {
+		fs_rmdir_helper(path);
+	} else {
+		cl_must_pass(unlink(path));
+	}
 }
 
 void
diff --git a/tests/clar/print.h b/tests/clar/print.h
index 2e2b6202c..dbfd27655 100644
--- a/tests/clar/print.h
+++ b/tests/clar/print.h
@@ -1,12 +1,13 @@
+/* clap: clar protocol, the traditional clar output format */
 
-static void clar_print_init(int test_count, int suite_count, const char *suite_names)
+static void clar_print_clap_init(int test_count, int suite_count, const char *suite_names)
 {
 	(void)test_count;
 	printf("Loaded %d suites: %s\n", (int)suite_count, suite_names);
 	printf("Started (test status codes: OK='.' FAILURE='F' SKIPPED='S')\n");
 }
 
-static void clar_print_shutdown(int test_count, int suite_count, int error_count)
+static void clar_print_clap_shutdown(int test_count, int suite_count, int error_count)
 {
 	(void)test_count;
 	(void)suite_count;
@@ -16,7 +17,7 @@ static void clar_print_shutdown(int test_count, int suite_count, int error_count
 	clar_report_all();
 }
 
-static void clar_print_error(int num, const struct clar_report *report, const struct clar_error *error)
+static void clar_print_clap_error(int num, const struct clar_report *report, const struct clar_error *error)
 {
 	printf("  %d) Failure:\n", num);
 
@@ -35,7 +36,7 @@ static void clar_print_error(int num, const struct clar_report *report, const st
 	fflush(stdout);
 }
 
-static void clar_print_ontest(const char *test_name, int test_number, enum cl_test_status status)
+static void clar_print_clap_ontest(const char *test_name, int test_number, enum cl_test_status status)
 {
 	(void)test_name;
 	(void)test_number;
@@ -50,7 +51,7 @@ static void clar_print_ontest(const char *test_name, int test_number, enum cl_te
 	fflush(stdout);
 }
 
-static void clar_print_onsuite(const char *suite_name, int suite_index)
+static void clar_print_clap_onsuite(const char *suite_name, int suite_index)
 {
 	if (_clar.report_suite_names)
 		printf("\n%s", suite_name);
@@ -58,10 +59,142 @@ static void clar_print_onsuite(const char *suite_name, int suite_index)
 	(void)suite_index;
 }
 
+static void clar_print_clap_onabort(const char *fmt, va_list arg)
+{
+	vfprintf(stderr, fmt, arg);
+}
+
+/* tap: test anywhere protocol format */
+
+static void clar_print_tap_init(int test_count, int suite_count, const char *suite_names)
+{
+	(void)test_count;
+	(void)suite_count;
+	(void)suite_names;
+	printf("TAP version 13\n");
+}
+
+static void clar_print_tap_shutdown(int test_count, int suite_count, int error_count)
+{
+	(void)suite_count;
+	(void)error_count;
+
+	printf("1..%d\n", test_count);
+}
+
+static void clar_print_tap_error(int num, const struct clar_report *report, const struct clar_error *error)
+{
+	(void)num;
+	(void)report;
+	(void)error;
+}
+
+static void print_escaped(const char *str)
+{
+	char *c;
+
+	while ((c = strchr(str, '\'')) != NULL) {
+		printf("%.*s", (int)(c - str), str);
+		printf("''");
+		str = c + 1;
+	}
+
+	printf("%s", str);
+}
+
+static void clar_print_tap_ontest(const char *test_name, int test_number, enum cl_test_status status)
+{
+	const struct clar_error *error = _clar.last_report->errors;
+
+	(void)test_name;
+	(void)test_number;
+
+	switch(status) {
+	case CL_TEST_OK:
+		printf("ok %d - %s::%s\n", test_number, _clar.active_suite, test_name);
+		break;
+	case CL_TEST_FAILURE:
+		printf("not ok %d - %s::%s\n", test_number, _clar.active_suite, test_name);
+
+		printf("    ---\n");
+		printf("    reason: |\n");
+		printf("      %s\n", error->error_msg);
+
+		if (error->description)
+			printf("      %s\n", error->description);
+
+		printf("    at:\n");
+		printf("      file: '"); print_escaped(error->file); printf("'\n");
+		printf("      line: %" PRIuZ "\n", error->line_number);
+		printf("      function: '%s'\n", error->function);
+		printf("    ---\n");
+
+		break;
+	case CL_TEST_SKIP:
+	case CL_TEST_NOTRUN:
+		printf("ok %d - # SKIP %s::%s\n", test_number, _clar.active_suite, test_name);
+		break;
+	}
+
+	fflush(stdout);
+}
+
+static void clar_print_tap_onsuite(const char *suite_name, int suite_index)
+{
+	printf("# start of suite %d: %s\n", suite_index, suite_name);
+}
+
+static void clar_print_tap_onabort(const char *fmt, va_list arg)
+{
+	printf("Bail out! ");
+	vprintf(fmt, arg);
+	fflush(stdout);
+}
+
+/* indirection between protocol output selection */
+
+#define PRINT(FN, ...) do { \
+		switch (_clar.output_format) { \
+			case CL_OUTPUT_CLAP: \
+				clar_print_clap_##FN (__VA_ARGS__); \
+				break; \
+			case CL_OUTPUT_TAP: \
+				clar_print_tap_##FN (__VA_ARGS__); \
+				break; \
+			default: \
+				abort(); \
+		} \
+	} while (0)
+
+static void clar_print_init(int test_count, int suite_count, const char *suite_names)
+{
+	PRINT(init, test_count, suite_count, suite_names);
+}
+
+static void clar_print_shutdown(int test_count, int suite_count, int error_count)
+{
+	PRINT(shutdown, test_count, suite_count, error_count);
+}
+
+static void clar_print_error(int num, const struct clar_report *report, const struct clar_error *error)
+{
+	PRINT(error, num, report, error);
+}
+
+static void clar_print_ontest(const char *test_name, int test_number, enum cl_test_status status)
+{
+	PRINT(ontest, test_name, test_number, status);
+}
+
+static void clar_print_onsuite(const char *suite_name, int suite_index)
+{
+	PRINT(onsuite, suite_name, suite_index);
+}
+
 static void clar_print_onabort(const char *msg, ...)
 {
 	va_list argp;
 	va_start(argp, msg);
-	vfprintf(stderr, msg, argp);
+	PRINT(onabort, msg, argp);
 	va_end(argp);
 }
diff --git a/tests/clar_libgit2.c b/tests/clar_libgit2.c
index 4723a0632..65b8923f5 100644
--- a/tests/clar_libgit2.c
+++ b/tests/clar_libgit2.c
@@ -4,7 +4,7 @@
 #include "git2/sys/repository.h"
 
 void cl_git_report_failure(
-	int error, int expected, const char *file, int line, const char *fncall)
+	int error, int expected, const char *file, const char *func, int line, const char *fncall)
 {
 	char msg[4096];
 	const git_error *last = git_error_last();
@@ -18,7 +18,7 @@ void cl_git_report_failure(
 	else
 		p_snprintf(msg, 4096, "no error, expected non-zero return");
 
-	clar__assert(0, file, line, fncall, msg, 1);
+	clar__assert(0, file, func, line, fncall, msg, 1);
 }
 
 void cl_git_mkfile(const char *filename, const char *content)
@@ -507,6 +507,7 @@ void clar__assert_equal_file(
 	int ignore_cr,
 	const char *path,
 	const char *file,
+	const char *func,
 	int line)
 {
 	char buf[4000];
@@ -519,7 +520,7 @@ void clar__assert_equal_file(
 
 	while ((bytes = p_read(fd, buf, sizeof(buf))) != 0) {
 		clar__assert(
-			bytes > 0, file, line, "error reading from file", path, 1);
+			bytes > 0, file, func, line, "error reading from file", path, 1);
 
 		if (ignore_cr)
 			bytes = strip_cr_from_buf(buf, bytes);
@@ -532,7 +533,7 @@ void clar__assert_equal_file(
 				buf, sizeof(buf), "file content mismatch at byte %"PRIdZ,
 				(ssize_t)(total_bytes + pos));
 			p_close(fd);
-			clar__fail(file, line, path, buf, 1);
+			clar__fail(file, func, line, path, buf, 1);
 		}
 
 		expected_data += bytes;
@@ -541,8 +542,8 @@ void clar__assert_equal_file(
 
 	p_close(fd);
 
-	clar__assert(!bytes, file, line, "error reading from file", path, 1);
-	clar__assert_equal(file, line, "mismatched file length", 1, "%"PRIuZ,
+	clar__assert(!bytes, file, func, line, "error reading from file", path, 1);
+	clar__assert_equal(file, func, line, "mismatched file length", 1, "%"PRIuZ,
 		(size_t)expected_bytes, (size_t)total_bytes);
 }
 
diff --git a/tests/clar_libgit2.h b/tests/clar_libgit2.h
index 12175c629..e3b7bd9f8 100644
--- a/tests/clar_libgit2.h
+++ b/tests/clar_libgit2.h
@@ -12,15 +12,15 @@
  *
  * Use this wrapper around all `git_` library calls that return error codes!
  */
-#define cl_git_pass(expr) cl_git_expect((expr), 0, __FILE__, __LINE__)
+#define cl_git_pass(expr) cl_git_expect((expr), 0, __FILE__, __func__, __LINE__)
 
-#define cl_git_fail_with(error, expr) cl_git_expect((expr), error, __FILE__, __LINE__)
+#define cl_git_fail_with(error, expr) cl_git_expect((expr), error, __FILE__, __func__, __LINE__)
 
-#define cl_git_expect(expr, expected, file, line) do { \
+#define cl_git_expect(expr, expected, file, func, line) do { \
 	int _lg2_error; \
 	git_error_clear(); \
 	if ((_lg2_error = (expr)) != expected) \
-		cl_git_report_failure(_lg2_error, expected, file, line, "Function call failed: " #expr); \
+		cl_git_report_failure(_lg2_error, expected, file, func, line, "Function call failed: " #expr); \
 	} while (0)
 
 /**
@@ -31,7 +31,7 @@
 #define cl_git_fail(expr) do { \
 	if ((expr) == 0) \
 		git_error_clear(), \
-		cl_git_report_failure(0, 0, __FILE__, __LINE__, "Function call succeeded: " #expr); \
+		cl_git_report_failure(0, 0, __FILE__, __func__, __LINE__, "Function call succeeded: " #expr); \
 	} while (0)
 
 /**
@@ -41,7 +41,7 @@
 	int _win32_res; \
 	if ((_win32_res = (expr)) == 0) { \
 		git_error_set(GIT_ERROR_OS, "Returned: %d, system error code: %lu", _win32_res, GetLastError()); \
-		cl_git_report_failure(_win32_res, 0, __FILE__, __LINE__, "System call failed: " #expr); \
+		cl_git_report_failure(_win32_res, 0, __FILE__, __func__, __LINE__, "System call failed: " #expr); \
 	} \
 	} while(0)
 
@@ -58,22 +58,24 @@
 typedef struct {
 	int error;
 	const char *file;
+	const char *func;
 	int line;
 	const char *expr;
 	char error_msg[4096];
 } cl_git_thread_err;
 
 #ifdef GIT_THREADS
-# define cl_git_thread_pass(threaderr, expr) cl_git_thread_pass_(threaderr, (expr), __FILE__, __LINE__)
+# define cl_git_thread_pass(threaderr, expr) cl_git_thread_pass_(threaderr, (expr), __FILE__, __func__, __LINE__)
 #else
 # define cl_git_thread_pass(threaderr, expr) cl_git_pass(expr)
 #endif
 
-#define cl_git_thread_pass_(__threaderr, __expr, __file, __line) do { \
+#define cl_git_thread_pass_(__threaderr, __expr, __file, __func, __line) do { \
 	git_error_clear(); \
 	if ((((cl_git_thread_err *)__threaderr)->error = (__expr)) != 0) { \
 		const git_error *_last = git_error_last(); \
 		((cl_git_thread_err *)__threaderr)->file = __file; \
+		((cl_git_thread_err *)__threaderr)->func = __func; \
 		((cl_git_thread_err *)__threaderr)->line = __line; \
 		((cl_git_thread_err *)__threaderr)->expr = "Function call failed: " #__expr; \
 		p_snprintf(((cl_git_thread_err *)__threaderr)->error_msg, 4096, "thread 0x%" PRIxZ " - error %d - %s", \
@@ -87,38 +89,39 @@ GIT_INLINE(void) cl_git_thread_check(void *data)
 {
 	cl_git_thread_err *threaderr = (cl_git_thread_err *)data;
 	if (threaderr->error != 0)
-		clar__assert(0, threaderr->file, threaderr->line, threaderr->expr, threaderr->error_msg, 1);
+		clar__assert(0, threaderr->file, threaderr->func, threaderr->line, threaderr->expr, threaderr->error_msg, 1);
 }
 
-void cl_git_report_failure(int, int, const char *, int, const char *);
+void cl_git_report_failure(int, int, const char *, const char *, int, const char *);
 
-#define cl_assert_at_line(expr,file,line) \
-	clar__assert((expr) != 0, file, line, "Expression is not true: " #expr, NULL, 1)
+#define cl_assert_at_line(expr,file,func,line) \
+	clar__assert((expr) != 0, file, func, line, "Expression is not true: " #expr, NULL, 1)
 
 GIT_INLINE(void) clar__assert_in_range(
 	int lo, int val, int hi,
-	const char *file, int line, const char *err, int should_abort)
+	const char *file, const char *func, int line,
+	const char *err, int should_abort)
 {
 	if (lo > val || hi < val) {
 		char buf[128];
 		p_snprintf(buf, sizeof(buf), "%d not in [%d,%d]", val, lo, hi);
-		clar__fail(file, line, err, buf, should_abort);
+		clar__fail(file, func, line, err, buf, should_abort);
 	}
 }
 
 #define cl_assert_equal_sz(sz1,sz2) do { \
 	size_t __sz1 = (size_t)(sz1), __sz2 = (size_t)(sz2); \
-	clar__assert_equal(__FILE__,__LINE__,#sz1 " != " #sz2, 1, "%"PRIuZ, __sz1, __sz2); \
+	clar__assert_equal(__FILE__,__func__,__LINE__,#sz1 " != " #sz2, 1, "%"PRIuZ, __sz1, __sz2); \
 } while (0)
 
 #define cl_assert_in_range(L,V,H) \
-	clar__assert_in_range((L),(V),(H),__FILE__,__LINE__,"Range check: " #V " in [" #L "," #H "]", 1)
+	clar__assert_in_range((L),(V),(H),__FILE__,__func__,__LINE__,"Range check: " #V " in [" #L "," #H "]", 1)
 
 #define cl_assert_equal_file(DATA,SIZE,PATH) \
-	clar__assert_equal_file(DATA,SIZE,0,PATH,__FILE__,(int)__LINE__)
+	clar__assert_equal_file(DATA,SIZE,0,PATH,__FILE__,__func__,(int)__LINE__)
 
 #define cl_assert_equal_file_ignore_cr(DATA,SIZE,PATH) \
-	clar__assert_equal_file(DATA,SIZE,1,PATH,__FILE__,(int)__LINE__)
+	clar__assert_equal_file(DATA,SIZE,1,PATH,__FILE__,__func__,(int)__LINE__)
 
 void clar__assert_equal_file(
 	const char *expected_data,
@@ -126,10 +129,11 @@ void clar__assert_equal_file(
 	int ignore_cr,
 	const char *path,
 	const char *file,
+	const char *func,
 	int line);
 
 GIT_INLINE(void) clar__assert_equal_oid(
-	const char *file, int line, const char *desc,
+	const char *file, const char *func, int line, const char *desc,
 	const git_oid *one, const git_oid *two)
 {
 	if (git_oid_cmp(one, two)) {
@@ -138,12 +142,12 @@ GIT_INLINE(void) clar__assert_equal_oid(
 		git_oid_fmt(&err[1], one);
 		git_oid_fmt(&err[47], two);
 
-		clar__fail(file, line, desc, err, 1);
+		clar__fail(file, func, line, desc, err, 1);
 	}
 }
 
 #define cl_assert_equal_oid(one, two) \
-	clar__assert_equal_oid(__FILE__, __LINE__, \
+	clar__assert_equal_oid(__FILE__, __func__, __LINE__, \
 		"OID mismatch: " #one " != " #two, (one), (two))
 
 /*
diff --git a/tests/clone/empty.c b/tests/clone/empty.c
index 8e59d2b8c..94847bc73 100644
--- a/tests/clone/empty.c
+++ b/tests/clone/empty.c
@@ -2,6 +2,7 @@
 
 #include "git2/clone.h"
 #include "repository.h"
+#include "repo/repo_helpers.h"
 
 static git_clone_options g_options;
 static git_repository *g_repo;
@@ -22,6 +23,7 @@ void test_clone_empty__initialize(void)
 
 void test_clone_empty__cleanup(void)
 {
+	cl_fixture_cleanup("tmp_global_path");
 	cl_git_sandbox_cleanup();
 }
 
@@ -66,6 +68,21 @@ void test_clone_empty__can_clone_an_empty_local_repo_barely(void)
 		expected_tracked_branch_name));
 }
 
+void test_clone_empty__respects_initialbranch_config(void)
+{
+	git_buf buf = GIT_BUF_INIT;
+
+	create_tmp_global_config("tmp_global_path", "init.defaultbranch", "my_default_branch");
+
+	cl_set_cleanup(&cleanup_repository, "./empty");
+
+	g_options.bare = true;
+	cl_git_pass(git_clone(&g_repo_cloned, "./empty_bare.git", "./empty", &g_options));
+	cl_git_pass(git_branch_upstream_name(&buf, g_repo_cloned, "refs/heads/my_default_branch"));
+	cl_assert_equal_s("refs/remotes/origin/my_default_branch", buf.ptr);
+	git_buf_dispose(&buf);
+}
+
 void test_clone_empty__can_clone_an_empty_local_repo(void)
 {
 	cl_set_cleanup(&cleanup_repository, "./empty");
diff --git a/tests/config/read.c b/tests/config/read.c
index ba97302f7..109908750 100644
--- a/tests/config/read.c
+++ b/tests/config/read.c
@@ -928,3 +928,79 @@ void test_config_read__nosection(void)
 	git_buf_dispose(&buf);
 	git_config_free(cfg);
 }
+
+enum {
+	MAP_TRUE = 0,
+	MAP_FALSE = 1,
+	MAP_ALWAYS = 2
+};
+
+static git_configmap _test_map1[] = {
+	{GIT_CONFIGMAP_STRING, "always", MAP_ALWAYS},
+	{GIT_CONFIGMAP_FALSE, NULL, MAP_FALSE},
+	{GIT_CONFIGMAP_TRUE, NULL, MAP_TRUE},
+};
+
+static git_configmap _test_map2[] = {
+	{GIT_CONFIGMAP_INT32, NULL, 0},
+};
+
+void test_config_read__get_mapped(void)
+{
+	git_config *cfg;
+	int val;
+	int known_good;
+
+	cl_set_cleanup(&clean_test_config, NULL);
+	cl_git_mkfile("./testconfig", "[header]\n"
+								  "  key1 = 1\n"
+								  "  key2 = true\n"
+								  "  key3\n"
+								  "  key4 = always\n"
+								  "  key5 = false\n"
+								  "  key6 = 0\n"
+								  "  key7 = never\n"
+								  "  key8 = On\n"
+								  "  key9 = off\n");
+	cl_git_pass(git_config_open_ondisk(&cfg, "./testconfig"));
+
+	// check parsing bool and string
+	cl_git_pass(git_config_get_mapped(&val, cfg, "header.key1", _test_map1, ARRAY_SIZE(_test_map1)));
+	cl_assert_equal_i(val, MAP_TRUE);
+	cl_git_pass(git_config_get_mapped(&val, cfg, "header.key2", _test_map1, ARRAY_SIZE(_test_map1)));
+	cl_assert_equal_i(val, MAP_TRUE);
+	cl_git_pass(git_config_get_mapped(&val, cfg, "header.key3", _test_map1, ARRAY_SIZE(_test_map1)));
+	cl_assert_equal_i(val, MAP_TRUE);
+	cl_git_pass(git_config_get_mapped(&val, cfg, "header.key8", _test_map1, ARRAY_SIZE(_test_map1)));
+	cl_assert_equal_i(val, MAP_TRUE);
+
+	cl_git_pass(git_config_get_mapped(&val, cfg, "header.key4", _test_map1, ARRAY_SIZE(_test_map1)));
+	cl_assert_equal_i(val, MAP_ALWAYS);
+
+	cl_git_pass(git_config_get_mapped(&val, cfg, "header.key5", _test_map1, ARRAY_SIZE(_test_map1)));
+	cl_assert_equal_i(val, MAP_FALSE);
+	cl_git_pass(git_config_get_mapped(&val, cfg, "header.key6", _test_map1, ARRAY_SIZE(_test_map1)));
+	cl_assert_equal_i(val, MAP_FALSE);
+	cl_git_pass(git_config_get_mapped(&val, cfg, "header.key9", _test_map1, ARRAY_SIZE(_test_map1)));
+	cl_assert_equal_i(val, MAP_FALSE);
+
+	cl_git_fail(git_config_get_mapped(&val, cfg, "header.key7", _test_map1, ARRAY_SIZE(_test_map1)));
+
+	// check parsing int values
+	cl_git_pass(git_config_get_mapped(&val, cfg, "header.key1", _test_map2, ARRAY_SIZE(_test_map2)));
+	cl_git_pass(git_config_get_int32(&known_good, cfg, "header.key1"));
+	cl_assert_equal_i(val, known_good);
+	cl_git_pass(git_config_get_mapped(&val, cfg, "header.key6", _test_map2, ARRAY_SIZE(_test_map2)));
+	cl_git_pass(git_config_get_int32(&known_good, cfg, "header.key6"));
+	cl_assert_equal_i(val, known_good);
+
+	cl_git_fail(git_config_get_mapped(&val, cfg, "header.key2", _test_map2, ARRAY_SIZE(_test_map2)));
+	cl_git_fail(git_config_get_mapped(&val, cfg, "header.key3", _test_map2, ARRAY_SIZE(_test_map2)));
+	cl_git_fail(git_config_get_mapped(&val, cfg, "header.key4", _test_map2, ARRAY_SIZE(_test_map2)));
+	cl_git_fail(git_config_get_mapped(&val, cfg, "header.key5", _test_map2, ARRAY_SIZE(_test_map2)));
+	cl_git_fail(git_config_get_mapped(&val, cfg, "header.key7", _test_map2, ARRAY_SIZE(_test_map2)));
+	cl_git_fail(git_config_get_mapped(&val, cfg, "header.key8", _test_map2, ARRAY_SIZE(_test_map2)));
+	cl_git_fail(git_config_get_mapped(&val, cfg, "header.key9", _test_map2, ARRAY_SIZE(_test_map2)));
+
+	git_config_free(cfg);
+}
diff --git a/tests/config/stress.c b/tests/config/stress.c
index 28c3c4ac0..577452e8d 100644
--- a/tests/config/stress.c
+++ b/tests/config/stress.c
@@ -59,6 +59,11 @@ void test_config_stress__comments(void)
 	assert_config_value(config, "some.section.multi", "hi, this is a ; multiline comment # with ;\n special chars and other stuff !@#");
 	assert_config_value(config, "some.section.multi2", "good, this is a ; multiline comment # with ;\n special chars and other stuff !@#");
 	assert_config_value(config, "some.section.back", "this is \ba phrase");
+	assert_config_value(config, "some.section.dollar", "some $sign");
+	assert_config_value(config, "some.section.multiquotes", "!ls  x                     ls  # comment2                     $HOME");
+	assert_config_value(config, "some.section.multiquotes2", "!ls  x                      ls  \"# comment2                      $HOME\"");
+	assert_config_value(config, "some.section.multiquotes3", "hi # ho there are # more quotes");
+	assert_config_value(config, "some.section.quotecomment", "hi # ho there are # more");
 
 	git_config_free(config);
 }
diff --git a/tests/core/assert.c b/tests/core/assert.c
new file mode 100644
index 000000000..ef75624b9
--- /dev/null
+++ b/tests/core/assert.c
@@ -0,0 +1,94 @@
+#ifdef GIT_ASSERT_HARD
+# undef GIT_ASSERT_HARD
+#endif
+
+#define GIT_ASSERT_HARD 0
+
+#include "clar_libgit2.h"
+
+static const char *hello_world = "hello, world";
+static const char *fail = "FAIL";
+
+static int dummy_fn(const char *myarg)
+{
+	GIT_ASSERT_ARG(myarg);
+	GIT_ASSERT_ARG(myarg != hello_world);
+	return 0;
+}
+
+static const char *fn_returns_string(const char *myarg)
+{
+	GIT_ASSERT_ARG_WITH_RETVAL(myarg, fail);
+	GIT_ASSERT_ARG_WITH_RETVAL(myarg != hello_world, fail);
+
+	return myarg;
+}
+
+static int bad_math(void)
+{
+	GIT_ASSERT(1 + 1 == 3);
+	return 42;
+}
+
+static const char *bad_returns_string(void)
+{
+	GIT_ASSERT_WITH_RETVAL(1 + 1 == 3, NULL);
+	return hello_world;
+}
+
+void test_core_assert__argument(void)
+{
+	cl_git_fail(dummy_fn(NULL));
+	cl_assert(git_error_last());
+	cl_assert_equal_i(GIT_ERROR_INVALID, git_error_last()->klass);
+	cl_assert_equal_s("invalid argument: 'myarg'", git_error_last()->message);
+
+	cl_git_fail(dummy_fn(hello_world));
+	cl_assert(git_error_last());
+	cl_assert_equal_i(GIT_ERROR_INVALID, git_error_last()->klass);
+	cl_assert_equal_s("invalid argument: 'myarg != hello_world'", git_error_last()->message);
+
+	cl_git_pass(dummy_fn("foo"));
+}
+
+void test_core_assert__argument_with_non_int_return_type(void)
+{
+	const char *foo = "foo";
+
+	cl_assert_equal_p(fail, fn_returns_string(NULL));
+	cl_assert_equal_i(GIT_ERROR_INVALID, git_error_last()->klass);
+	cl_assert_equal_s("invalid argument: 'myarg'", git_error_last()->message);
+
+	cl_assert_equal_p(fail, fn_returns_string(hello_world));
+	cl_assert_equal_i(GIT_ERROR_INVALID, git_error_last()->klass);
+	cl_assert_equal_s("invalid argument: 'myarg != hello_world'", git_error_last()->message);
+
+	cl_assert_equal_p(foo, fn_returns_string(foo));
+}
+
+void test_core_assert__argument_with_void_return_type(void)
+{
+	const char *foo = "foo";
+
+	git_error_clear();
+	fn_returns_string(hello_world);
+	cl_assert_equal_i(GIT_ERROR_INVALID, git_error_last()->klass);
+	cl_assert_equal_s("invalid argument: 'myarg != hello_world'", git_error_last()->message);
+
+	git_error_clear();
+	cl_assert_equal_p(foo, fn_returns_string(foo));
+	cl_assert_equal_p(NULL, git_error_last());
+}
+
+void test_core_assert__internal(void)
+{
+	cl_git_fail(bad_math());
+	cl_assert(git_error_last());
+	cl_assert_equal_i(GIT_ERROR_INTERNAL, git_error_last()->klass);
+	cl_assert_equal_s("unrecoverable internal error: '1 + 1 == 3'", git_error_last()->message);
+
+	cl_assert_equal_p(NULL, bad_returns_string());
+	cl_assert(git_error_last());
+	cl_assert_equal_i(GIT_ERROR_INTERNAL, git_error_last()->klass);
+	cl_assert_equal_s("unrecoverable internal error: '1 + 1 == 3'", git_error_last()->message);
+}
diff --git a/tests/core/mkdir.c b/tests/core/mkdir.c
index ce11953f0..3f04c2ad3 100644
--- a/tests/core/mkdir.c
+++ b/tests/core/mkdir.c
@@ -150,10 +150,11 @@ static void cleanup_chmod_root(void *ref)
 	git_futils_rmdir_r("r", NULL, GIT_RMDIR_EMPTY_HIERARCHY);
 }
 
-#define check_mode(X,A) check_mode_at_line((X), (A), __FILE__, __LINE__)
+#define check_mode(X,A) check_mode_at_line((X), (A), __FILE__, __func__, __LINE__)
 
 static void check_mode_at_line(
-	mode_t expected, mode_t actual, const char *file, int line)
+	mode_t expected, mode_t actual,
+	const char *file, const char *func, int line)
 {
 	/* FAT filesystems don't support exec bit, nor group/world bits */
 	if (!cl_is_chmod_supported()) {
@@ -162,7 +163,7 @@ static void check_mode_at_line(
 	}
 
 	clar__assert_equal(
-		file, line, "expected_mode != actual_mode", 1,
+		file, func, line, "expected_mode != actual_mode", 1,
 		"%07o", (int)expected, (int)(actual & 0777));
 }
 
diff --git a/tests/core/structinit.c b/tests/core/structinit.c
index f9da8237c..192096be3 100644
--- a/tests/core/structinit.c
+++ b/tests/core/structinit.c
@@ -48,7 +48,7 @@ static void options_cmp(void *one, void *two, size_t size, const char *name)
 
 			p_snprintf(desc, 1024, "Difference in %s at byte %" PRIuZ ": macro=%u / func=%u",
 				name, i, ((char *)one)[i], ((char *)two)[i]);
-			clar__fail(__FILE__, __LINE__,
+			clar__fail(__FILE__, __func__, __LINE__,
 				"Difference between macro and function options initializer",
 				desc, 0);
 			return;
diff --git a/tests/core/wildmatch.c b/tests/core/wildmatch.c
index e7897c6e6..7c56ee7b8 100644
--- a/tests/core/wildmatch.c
+++ b/tests/core/wildmatch.c
@@ -3,21 +3,21 @@
 #include "wildmatch.h"
 
 #define assert_matches(string, pattern, wildmatch, iwildmatch, pathmatch, ipathmatch) \
-	assert_matches_(string, pattern, wildmatch, iwildmatch, pathmatch, ipathmatch, __FILE__, __LINE__)
+	assert_matches_(string, pattern, wildmatch, iwildmatch, pathmatch, ipathmatch, __FILE__, __func__, __LINE__)
 
 static void assert_matches_(const char *string, const char *pattern,
 		char expected_wildmatch, char expected_iwildmatch,
 		char expected_pathmatch, char expected_ipathmatch,
-		const char *file, size_t line)
+		const char *file, const char *func, size_t line)
 {
 	if (wildmatch(pattern, string, WM_PATHNAME) == expected_wildmatch)
-		clar__fail(file, line, "Test failed (wildmatch).", string, 1);
+		clar__fail(file, func, line, "Test failed (wildmatch).", string, 1);
 	if (wildmatch(pattern, string, WM_PATHNAME|WM_CASEFOLD) == expected_iwildmatch)
-		clar__fail(file, line, "Test failed (iwildmatch).", string, 1);
+		clar__fail(file, func, line, "Test failed (iwildmatch).", string, 1);
 	if (wildmatch(pattern, string, 0) == expected_pathmatch)
-		clar__fail(file, line, "Test failed (pathmatch).", string, 1);
+		clar__fail(file, func, line, "Test failed (pathmatch).", string, 1);
 	if (wildmatch(pattern, string, WM_CASEFOLD) == expected_ipathmatch)
-		clar__fail(file, line, "Test failed (ipathmatch).", string, 1);
+		clar__fail(file, func, line, "Test failed (ipathmatch).", string, 1);
 }
 
 /*
diff --git a/tests/core/zstream.c b/tests/core/zstream.c
index bcbb45fde..3cbcea168 100644
--- a/tests/core/zstream.c
+++ b/tests/core/zstream.c
@@ -9,7 +9,7 @@ static const char *data = "This is a test test test of This is a test";
 static void assert_zlib_equal_(
 	const void *expected, size_t e_len,
 	const void *compressed, size_t c_len,
-	const char *msg, const char *file, int line)
+	const char *msg, const char *file, const char *func, int line)
 {
 	z_stream stream;
 	char *expanded = git__calloc(1, e_len + INFLATE_EXTRA);
@@ -26,21 +26,21 @@ static void assert_zlib_equal_(
 	inflateEnd(&stream);
 
 	clar__assert_equal(
-		file, line, msg, 1,
+		file, func, line, msg, 1,
 		"%d", (int)stream.total_out, (int)e_len);
 	clar__assert_equal(
-		file, line, "Buffer len was not exact match", 1,
+		file, func, line, "Buffer len was not exact match", 1,
 		"%d", (int)stream.avail_out, (int)INFLATE_EXTRA);
 
 	clar__assert(
 		memcmp(expanded, expected, e_len) == 0,
-		file, line, "uncompressed data did not match", NULL, 1);
+		file, func, line, "uncompressed data did not match", NULL, 1);
 
 	git__free(expanded);
 }
 
 #define assert_zlib_equal(E,EL,C,CL) \
-	assert_zlib_equal_(E, EL, C, CL, #EL " != " #CL, __FILE__, (int)__LINE__)
+	assert_zlib_equal_(E, EL, C, CL, #EL " != " #CL, __FILE__, __func__, (int)__LINE__)
 
 void test_core_zstream__basic(void)
 {
diff --git a/tests/diff/format_email.c b/tests/diff/format_email.c
index 28f840ab0..bdfc4cac3 100644
--- a/tests/diff/format_email.c
+++ b/tests/diff/format_email.c
@@ -487,7 +487,7 @@ void test_diff_format_email__binary(void)
 	"Subject: [PATCH] Modified binary file\n" \
 	"\n" \
 	"---\n" \
-	" binary.bin | Bin 3 -> 0 bytes\n" \
+	" binary.bin | Bin 3 -> 5 bytes\n" \
 	" 1 file changed, 0 insertions(+), 0 deletions(-)\n" \
 	"\n" \
 	"diff --git a/binary.bin b/binary.bin\n" \
@@ -496,7 +496,6 @@ void test_diff_format_email__binary(void)
 	"--\n" \
 	"libgit2 " LIBGIT2_VERSION "\n" \
 	"\n";
-	/* TODO: Actually 0 bytes here should be 5!. Seems like we don't load the new content for binary files? */
 
 	opts.summary = "Modified binary file";
 
diff --git a/tests/diff/parse.c b/tests/diff/parse.c
index b004d1e23..6b6e6645e 100644
--- a/tests/diff/parse.c
+++ b/tests/diff/parse.c
@@ -2,7 +2,6 @@
 #include "patch.h"
 #include "patch_parse.h"
 #include "diff_helpers.h"
-#include "../src/diff.h"
 
 #include "../patch/patch_common.h"
 
@@ -108,6 +107,29 @@ void test_diff_parse__no_extended_headers(void)
 	git_diff_free(diff);
 }
 
+void test_diff_parse__add_delete_no_index(void)
+{
+	const char *content =
+	    "diff --git a/file.txt b/file.txt\n"
+	    "new file mode 100644\n"
+	    "--- /dev/null\n"
+	    "+++ b/file.txt\n"
+	    "@@ -0,0 +1,2 @@\n"
+	    "+one\n"
+	    "+two\n"
+	    "diff --git a/otherfile.txt b/otherfile.txt\n"
+	    "deleted file mode 100644\n"
+	    "--- a/otherfile.txt\n"
+	    "+++ /dev/null\n"
+	    "@@ -1,1 +0,0 @@\n"
+	    "-three\n";
+	git_diff *diff;
+
+	cl_git_pass(git_diff_from_buffer(
+		&diff, content, strlen(content)));
+	git_diff_free(diff);
+}
+
 void test_diff_parse__invalid_patches_fails(void)
 {
 	test_parse_invalid_diff(PATCH_CORRUPT_MISSING_NEW_FILE);
@@ -319,20 +341,20 @@ void test_diff_parse__patch_roundtrip_succeeds(void)
 	git_buf_dispose(&diffbuf);
 }
 
-#define cl_assert_equal_i_src(i1,i2,file,line) clar__assert_equal(file,line,#i1 " != " #i2, 1, "%d", (int)(i1), (int)(i2))
+#define cl_assert_equal_i_src(i1,i2,file,func,line) clar__assert_equal(file,func,line,#i1 " != " #i2, 1, "%d", (int)(i1), (int)(i2))
 
-static void cl_git_assert_lineinfo_(int old_lineno, int new_lineno, int num_lines, git_patch *patch, size_t hunk_idx, size_t line_idx, const char *file, int lineno)
+static void cl_git_assert_lineinfo_(int old_lineno, int new_lineno, int num_lines, git_patch *patch, size_t hunk_idx, size_t line_idx, const char *file, const char *func, int lineno)
 {
 	const git_diff_line *line;
 
-	cl_git_expect(git_patch_get_line_in_hunk(&line, patch, hunk_idx, line_idx), 0, file, lineno);
-	cl_assert_equal_i_src(old_lineno, line->old_lineno, file, lineno);
-	cl_assert_equal_i_src(new_lineno, line->new_lineno, file, lineno);
-	cl_assert_equal_i_src(num_lines, line->num_lines, file, lineno);
+	cl_git_expect(git_patch_get_line_in_hunk(&line, patch, hunk_idx, line_idx), 0, file, func, lineno);
+	cl_assert_equal_i_src(old_lineno, line->old_lineno, file, func, lineno);
+	cl_assert_equal_i_src(new_lineno, line->new_lineno, file, func, lineno);
+	cl_assert_equal_i_src(num_lines, line->num_lines, file, func, lineno);
 }
 
 #define cl_git_assert_lineinfo(old, new, num, p, h, l) \
-	cl_git_assert_lineinfo_(old,new,num,p,h,l,__FILE__,__LINE__)
+	cl_git_assert_lineinfo_(old,new,num,p,h,l,__FILE__,__func__,__LINE__)
 
 
 void test_diff_parse__issue4672(void)
diff --git a/tests/diff/stats.c b/tests/diff/stats.c
index 150355686..54572672c 100644
--- a/tests/diff/stats.c
+++ b/tests/diff/stats.c
@@ -298,9 +298,8 @@ void test_diff_stats__binary(void)
 {
 	git_buf buf = GIT_BUF_INIT;
 	const char *stat =
-	" binary.bin | Bin 3 -> 0 bytes\n"
+	" binary.bin | Bin 3 -> 5 bytes\n"
 	" 1 file changed, 0 insertions(+), 0 deletions(-)\n";
-	/* TODO: Actually 0 bytes here should be 5!. Seems like we don't load the new content for binary files? */
 
 	diff_stats_from_commit_oid(
 		&_stats, "8d7523f6fcb2404257889abe0d96f093d9f524f9", false);
@@ -343,3 +342,38 @@ void test_diff_stats__mode_change(void)
 	cl_assert_equal_s(stat, git_buf_cstr(&buf));
 	git_buf_dispose(&buf);
 }
+
+void test_diff_stats__new_file(void)
+{
+	git_diff *diff;
+	git_buf buf = GIT_BUF_INIT;
+
+	const char *input =
+	"---\n"
+	" Gurjeet Singh | 1 +\n"
+	" 1 file changed, 1 insertion(+)\n"
+	" create mode 100644 Gurjeet Singh\n"
+	"\n"
+	"diff --git a/Gurjeet Singh b/Gurjeet Singh\n"
+	"new file mode 100644\n"
+	"index 0000000..6d0ecfd\n"
+	"--- /dev/null\n"
+	"+++ b/Gurjeet Singh	\n"
+	"@@ -0,0 +1 @@\n"
+	"+I'm about to try git send-email\n"
+	"-- \n"
+	"2.21.0\n";
+
+	const char *stat =
+	" Gurjeet Singh | 1 +\n"
+	" 1 file changed, 1 insertion(+)\n"
+	" create mode 100644 Gurjeet Singh\n";
+
+	cl_git_pass(git_diff_from_buffer(&diff, input, strlen(input)));
+	cl_git_pass(git_diff_get_stats(&_stats, diff));
+	cl_git_pass(git_diff_stats_to_buf(&buf, _stats, GIT_DIFF_STATS_FULL | GIT_DIFF_STATS_INCLUDE_SUMMARY, 0));
+	cl_assert_equal_s(stat, git_buf_cstr(&buf));
+
+	git_buf_dispose(&buf);
+	git_diff_free(diff);
+}
diff --git a/tests/diff/submodules.c b/tests/diff/submodules.c
index 8899d3f9c..93223ef7d 100644
--- a/tests/diff/submodules.c
+++ b/tests/diff/submodules.c
@@ -18,7 +18,8 @@ void test_diff_submodules__cleanup(void)
 #define get_buf_ptr(buf) ((buf)->asize ? (buf)->ptr : NULL)
 
 static void check_diff_patches_at_line(
-	git_diff *diff, const char **expected, const char *file, int line)
+	git_diff *diff, const char **expected,
+	const char *file, const char *func, int line)
 {
 	const git_diff_delta *delta;
 	git_patch *patch = NULL;
@@ -30,34 +31,34 @@ static void check_diff_patches_at_line(
 		cl_assert((delta = git_patch_get_delta(patch)) != NULL);
 
 		if (delta->status == GIT_DELTA_UNMODIFIED) {
-			cl_assert_at_line(expected[d] == NULL, file, line);
+			cl_assert_at_line(expected[d] == NULL, file, func, line);
 			continue;
 		}
 
 		if (expected[d] && !strcmp(expected[d], "<SKIP>"))
 			continue;
 		if (expected[d] && !strcmp(expected[d], "<UNTRACKED>")) {
-			cl_assert_at_line(delta->status == GIT_DELTA_UNTRACKED, file, line);
+			cl_assert_at_line(delta->status == GIT_DELTA_UNTRACKED, file, func, line);
 			continue;
 		}
 		if (expected[d] && !strcmp(expected[d], "<END>")) {
 			cl_git_pass(git_patch_to_buf(&buf, patch));
-			cl_assert_at_line(!strcmp(expected[d], "<END>"), file, line);
+			cl_assert_at_line(!strcmp(expected[d], "<END>"), file, func, line);
 		}
 
 		cl_git_pass(git_patch_to_buf(&buf, patch));
 
 		clar__assert_equal(
-			file, line, "expected diff did not match actual diff", 1,
+			file, func, line, "expected diff did not match actual diff", 1,
 			"%s", expected[d], get_buf_ptr(&buf));
 		git_buf_dispose(&buf);
 	}
 
-	cl_assert_at_line(expected[d] && !strcmp(expected[d], "<END>"), file, line);
+	cl_assert_at_line(expected[d] && !strcmp(expected[d], "<END>"), file, func, line);
 }
 
 #define check_diff_patches(diff, exp) \
-	check_diff_patches_at_line(diff, exp, __FILE__, __LINE__)
+	check_diff_patches_at_line(diff, exp, __FILE__, __func__, __LINE__)
 
 void test_diff_submodules__unmodified_submodule(void)
 {
diff --git a/tests/diff/workdir.c b/tests/diff/workdir.c
index 71b2e91a7..f2404958e 100644
--- a/tests/diff/workdir.c
+++ b/tests/diff/workdir.c
@@ -1876,9 +1876,9 @@ void test_diff_workdir__binary_detection(void)
 	git_buf b = GIT_BUF_INIT;
 	int i;
 	git_buf data[10] = {
-		{ "1234567890", 0, 0 },         /* 0 - all ascii text control */
-		{ "\xC3\x85\xC3\xBC\xE2\x80\xA0\x48\xC3\xB8\xCF\x80\xCE\xA9", 0, 0 },            /* 1 - UTF-8 multibyte text */
-		{ "\xEF\xBB\xBF\xC3\x9C\xE2\xA4\x92\xC6\x92\x38\xC2\xA3\xE2\x82\xAC", 0, 0 }, /* 2 - UTF-8 with BOM */
+		{ "1234567890", 0, 10 },         /* 0 - all ascii text control */
+		{ "\xC3\x85\xC3\xBC\xE2\x80\xA0\x48\xC3\xB8\xCF\x80\xCE\xA9", 0, 14 },            /* 1 - UTF-8 multibyte text */
+		{ "\xEF\xBB\xBF\xC3\x9C\xE2\xA4\x92\xC6\x92\x38\xC2\xA3\xE2\x82\xAC", 0, 16 }, /* 2 - UTF-8 with BOM */
 		{ STR999Z, 0, 1000 },           /* 3 - ASCII with NUL at 1000 */
 		{ STR3999Z, 0, 4000 },          /* 4 - ASCII with NUL at 4000 */
 		{ STR4000 STR3999Z "x", 0, 8001 }, /* 5 - ASCII with NUL at 8000 */
diff --git a/tests/ignore/path.c b/tests/ignore/path.c
index e23ac7712..5d53c9df9 100644
--- a/tests/ignore/path.c
+++ b/tests/ignore/path.c
@@ -17,19 +17,20 @@ void test_ignore_path__cleanup(void)
 }
 
 static void assert_is_ignored_(
-	bool expected, const char *filepath, const char *file, int line)
+	bool expected, const char *filepath,
+	const char *file, const char *func, int line)
 {
 	int is_ignored = 0;
 
 	cl_git_expect(
-		git_ignore_path_is_ignored(&is_ignored, g_repo, filepath), 0, file, line);
+		git_ignore_path_is_ignored(&is_ignored, g_repo, filepath), 0, file, func, line);
 
 	clar__assert_equal(
-		file, line, "expected != is_ignored", 1, "%d",
+		file, func, line, "expected != is_ignored", 1, "%d",
 		(int)(expected != 0), (int)(is_ignored != 0));
 }
 #define assert_is_ignored(expected, filepath) \
-	assert_is_ignored_(expected, filepath, __FILE__, __LINE__)
+	assert_is_ignored_(expected, filepath, __FILE__, __func__, __LINE__)
 
 void test_ignore_path__honor_temporary_rules(void)
 {
diff --git a/tests/ignore/status.c b/tests/ignore/status.c
index 5e67c1202..188fbe469 100644
--- a/tests/ignore/status.c
+++ b/tests/ignore/status.c
@@ -17,21 +17,22 @@ void test_ignore_status__cleanup(void)
 }
 
 static void assert_ignored_(
-	bool expected, const char *filepath, const char *file, int line)
+	bool expected, const char *filepath,
+	const char *file, const char *func, int line)
 {
 	int is_ignored = 0;
 	cl_git_expect(
-		git_status_should_ignore(&is_ignored, g_repo, filepath), 0, file, line);
+		git_status_should_ignore(&is_ignored, g_repo, filepath), 0, file, func, line);
 	clar__assert(
 		(expected != 0) == (is_ignored != 0),
-		file, line, "expected != is_ignored", filepath, 1);
+		file, func, line, "expected != is_ignored", filepath, 1);
 }
 #define assert_ignored(expected, filepath) \
-	assert_ignored_(expected, filepath, __FILE__, __LINE__)
+	assert_ignored_(expected, filepath, __FILE__, __func__, __LINE__)
 #define assert_is_ignored(filepath) \
-	assert_ignored_(true, filepath, __FILE__, __LINE__)
+	assert_ignored_(true, filepath, __FILE__, __func__, __LINE__)
 #define refute_is_ignored(filepath) \
-	assert_ignored_(false, filepath, __FILE__, __LINE__)
+	assert_ignored_(false, filepath, __FILE__, __func__, __LINE__)
 
 void test_ignore_status__0(void)
 {
diff --git a/tests/index/addall.c b/tests/index/addall.c
index c62c3cfe6..d1ef31daf 100644
--- a/tests/index/addall.c
+++ b/tests/index/addall.c
@@ -75,7 +75,7 @@ static void check_status_at_line(
 	git_repository *repo,
 	size_t index_adds, size_t index_dels, size_t index_mods,
 	size_t wt_adds, size_t wt_dels, size_t wt_mods, size_t ignores,
-	size_t conflicts, const char *file, int line)
+	size_t conflicts, const char *file, const char *func, int line)
 {
 	index_status_counts vals;
 
@@ -84,25 +84,25 @@ static void check_status_at_line(
 	cl_git_pass(git_status_foreach(repo, index_status_cb, &vals));
 
 	clar__assert_equal(
-		file,line,"wrong index adds", 1, "%"PRIuZ, index_adds, vals.index_adds);
+		file,func,line,"wrong index adds", 1, "%"PRIuZ, index_adds, vals.index_adds);
 	clar__assert_equal(
-		file,line,"wrong index dels", 1, "%"PRIuZ, index_dels, vals.index_dels);
+		file,func,line,"wrong index dels", 1, "%"PRIuZ, index_dels, vals.index_dels);
 	clar__assert_equal(
-		file,line,"wrong index mods", 1, "%"PRIuZ, index_mods, vals.index_mods);
+		file,func,line,"wrong index mods", 1, "%"PRIuZ, index_mods, vals.index_mods);
 	clar__assert_equal(
-		file,line,"wrong workdir adds", 1, "%"PRIuZ, wt_adds, vals.wt_adds);
+		file,func,line,"wrong workdir adds", 1, "%"PRIuZ, wt_adds, vals.wt_adds);
 	clar__assert_equal(
-		file,line,"wrong workdir dels", 1, "%"PRIuZ, wt_dels, vals.wt_dels);
+		file,func,line,"wrong workdir dels", 1, "%"PRIuZ, wt_dels, vals.wt_dels);
 	clar__assert_equal(
-		file,line,"wrong workdir mods", 1, "%"PRIuZ, wt_mods, vals.wt_mods);
+		file,func,line,"wrong workdir mods", 1, "%"PRIuZ, wt_mods, vals.wt_mods);
 	clar__assert_equal(
-		file,line,"wrong ignores", 1, "%"PRIuZ, ignores, vals.ignores);
+		file,func,line,"wrong ignores", 1, "%"PRIuZ, ignores, vals.ignores);
 	clar__assert_equal(
-		file,line,"wrong conflicts", 1, "%"PRIuZ, conflicts, vals.conflicts);
+		file,func,line,"wrong conflicts", 1, "%"PRIuZ, conflicts, vals.conflicts);
 }
 
 #define check_status(R,IA,ID,IM,WA,WD,WM,IG,C) \
-	check_status_at_line(R,IA,ID,IM,WA,WD,WM,IG,C,__FILE__,__LINE__)
+	check_status_at_line(R,IA,ID,IM,WA,WD,WM,IG,C,__FILE__,__func__,__LINE__)
 
 static void check_stat_data(git_index *index, const char *path, bool match)
 {
diff --git a/tests/index/crlf.c b/tests/index/crlf.c
index 7aa6be429..26c19d76d 100644
--- a/tests/index/crlf.c
+++ b/tests/index/crlf.c
@@ -96,7 +96,7 @@ done:
 		git_buf details = GIT_BUF_INIT;
 		git_buf_printf(&details, "filename=%s, system=%s, autocrlf=%s, safecrlf=%s, attrs={%s}",
 			basename, cd->systype, cd->autocrlf, cd->safecrlf, cd->attrs);
-		clar__fail(__FILE__, __LINE__,
+		clar__fail(__FILE__, __func__, __LINE__,
 			"index contents did not match expected", details.ptr, 0);
 		git_buf_dispose(&details);
 	}
diff --git a/tests/index/filemodes.c b/tests/index/filemodes.c
index af1f8035e..3d2bb4a03 100644
--- a/tests/index/filemodes.c
+++ b/tests/index/filemodes.c
@@ -51,11 +51,11 @@ static void replace_file_with_mode(
 	git_buf_dispose(&content);
 }
 
-#define add_and_check_mode(I,F,X) add_and_check_mode_(I,F,X,__FILE__,__LINE__)
+#define add_and_check_mode(I,F,X) add_and_check_mode_(I,F,X,__FILE__,__func__,__LINE__)
 
 static void add_and_check_mode_(
 	git_index *index, const char *filename, unsigned int expect_mode,
-	const char *file, int line)
+	const char *file, const char *func, int line)
 {
 	size_t pos;
 	const git_index_entry *entry;
@@ -63,11 +63,11 @@ static void add_and_check_mode_(
 	cl_git_pass(git_index_add_bypath(index, filename));
 
 	clar__assert(!git_index_find(&pos, index, filename),
-		file, line, "Cannot find index entry", NULL, 1);
+		file, func, line, "Cannot find index entry", NULL, 1);
 
 	entry = git_index_get_byindex(index, pos);
 
-	clar__assert_equal(file, line, "Expected mode does not match index",
+	clar__assert_equal(file, func, line, "Expected mode does not match index",
 		1, "%07o", (unsigned int)entry->mode, (unsigned int)expect_mode);
 }
 
@@ -153,11 +153,11 @@ void test_index_filemodes__trusted(void)
 	git_index_free(index);
 }
 
-#define add_entry_and_check_mode(I,FF,X) add_entry_and_check_mode_(I,FF,X,__FILE__,__LINE__)
+#define add_entry_and_check_mode(I,FF,X) add_entry_and_check_mode_(I,FF,X,__FILE__,__func__,__LINE__)
 
 static void add_entry_and_check_mode_(
 	git_index *index, bool from_file, git_filemode_t mode,
-	const char *file, int line)
+	const char *file, const char *func, int line)
 {
 	size_t pos;
 	const git_index_entry* entry;
@@ -169,7 +169,7 @@ static void add_entry_and_check_mode_(
 	if (from_file)
 	{
 		clar__assert(!git_index_find(&pos, index, "exec_off"),
-			file, line, "Cannot find original index entry", NULL, 1);
+			file, func, line, "Cannot find original index entry", NULL, 1);
 
 		entry = git_index_get_byindex(index, pos);
 
@@ -184,21 +184,21 @@ static void add_entry_and_check_mode_(
 	if (from_file)
 	{
 		clar__assert(!git_index_add(index, &new_entry),
-			file, line, "Cannot add index entry", NULL, 1);
+			file, func, line, "Cannot add index entry", NULL, 1);
 	}
 	else
 	{
 		const char *content = "hey there\n";
 		clar__assert(!git_index_add_from_buffer(index, &new_entry, content, strlen(content)),
-			file, line, "Cannot add index entry from buffer", NULL, 1);
+			file, func, line, "Cannot add index entry from buffer", NULL, 1);
 	}
 
 	clar__assert(!git_index_find(&pos, index, "filemodes/explicit_test"),
-		file, line, "Cannot find new index entry", NULL, 1);
+		file, func, line, "Cannot find new index entry", NULL, 1);
 
 	entry = git_index_get_byindex(index, pos);
 
-	clar__assert_equal(file, line, "Expected mode does not match index",
+	clar__assert_equal(file, func, line, "Expected mode does not match index",
 		1, "%07o", (unsigned int)entry->mode, (unsigned int)mode);
 }
 
diff --git a/tests/merge/trees/renames.c b/tests/merge/trees/renames.c
index c515aaf1b..eef7bc96b 100644
--- a/tests/merge/trees/renames.c
+++ b/tests/merge/trees/renames.c
@@ -307,7 +307,7 @@ void test_merge_trees_renames__cache_recomputation(void)
 	 */
 	cl_git_pass(git_treebuilder_new(&builder, repo, NULL));
 	for (i = 0; i < 1000; i++) {
-		cl_git_pass(git_buf_printf(&path, "%"PRIuMAX".txt", i));
+		cl_git_pass(git_buf_printf(&path, "%"PRIuZ".txt", i));
 		cl_git_pass(git_treebuilder_insert(NULL, builder, path.ptr, &blob, GIT_FILEMODE_BLOB));
 		git_buf_clear(&path);
 	}
diff --git a/tests/network/fetchlocal.c b/tests/network/fetchlocal.c
index 804308070..13f03100b 100644
--- a/tests/network/fetchlocal.c
+++ b/tests/network/fetchlocal.c
@@ -49,7 +49,7 @@ void test_network_fetchlocal__complete(void)
 	cl_assert_equal_i(19, (int)refnames.count);
 	cl_assert(callcount > 0);
 
-	git_strarray_free(&refnames);
+	git_strarray_dispose(&refnames);
 	git_remote_free(origin);
 	git_repository_free(repo);
 }
@@ -77,7 +77,7 @@ void test_network_fetchlocal__prune(void)
 	cl_git_pass(git_reference_list(&refnames, repo));
 	cl_assert_equal_i(19, (int)refnames.count);
 	cl_assert(callcount > 0);
-	git_strarray_free(&refnames);
+	git_strarray_dispose(&refnames);
 	git_remote_free(origin);
 
 	cl_git_pass(git_reference_lookup(&ref, remote_repo, "refs/heads/br2"));
@@ -90,7 +90,7 @@ void test_network_fetchlocal__prune(void)
 
 	cl_git_pass(git_reference_list(&refnames, repo));
 	cl_assert_equal_i(18, (int)refnames.count);
-	git_strarray_free(&refnames);
+	git_strarray_dispose(&refnames);
 	git_remote_free(origin);
 
 	cl_git_pass(git_reference_lookup(&ref, remote_repo, "refs/heads/packed"));
@@ -103,7 +103,7 @@ void test_network_fetchlocal__prune(void)
 
 	cl_git_pass(git_reference_list(&refnames, repo));
 	cl_assert_equal_i(17, (int)refnames.count);
-	git_strarray_free(&refnames);
+	git_strarray_dispose(&refnames);
 	git_remote_free(origin);
 
 	git_repository_free(repo);
@@ -168,7 +168,7 @@ void test_network_fetchlocal__prune_overlapping(void)
 	assert_ref_exists(repo, "refs/remotes/origin/pr/42");
 	cl_git_pass(git_reference_list(&refnames, repo));
 	cl_assert_equal_i(20, (int)refnames.count);
-	git_strarray_free(&refnames);
+	git_strarray_dispose(&refnames);
 
 	cl_git_pass(git_config_delete_multivar(config, "remote.origin.fetch", "refs"));
 	cl_git_pass(git_config_set_multivar(config, "remote.origin.fetch", "^$", "refs/pull/*/head:refs/remotes/origin/pr/*"));
@@ -183,7 +183,7 @@ void test_network_fetchlocal__prune_overlapping(void)
 	assert_ref_exists(repo, "refs/remotes/origin/pr/42");
 	cl_git_pass(git_reference_list(&refnames, repo));
 	cl_assert_equal_i(20, (int)refnames.count);
-	git_strarray_free(&refnames);
+	git_strarray_dispose(&refnames);
 
 	cl_git_pass(git_config_delete_multivar(config, "remote.origin.fetch", "refs"));
 	cl_git_pass(git_config_set_multivar(config, "remote.origin.fetch", "^$", "refs/heads/*:refs/remotes/origin/*"));
@@ -195,7 +195,7 @@ void test_network_fetchlocal__prune_overlapping(void)
 	cl_git_pass(git_remote_fetch(origin, NULL, &options, NULL));
 
 	git_config_free(config);
-	git_strarray_free(&refnames);
+	git_strarray_dispose(&refnames);
 	git_remote_free(origin);
 	git_repository_free(repo);
 }
@@ -224,7 +224,7 @@ void test_network_fetchlocal__fetchprune(void)
 	cl_git_pass(git_reference_list(&refnames, repo));
 	cl_assert_equal_i(19, (int)refnames.count);
 	cl_assert(callcount > 0);
-	git_strarray_free(&refnames);
+	git_strarray_dispose(&refnames);
 	git_remote_free(origin);
 
 	cl_git_pass(git_reference_lookup(&ref, remote_repo, "refs/heads/br2"));
@@ -237,7 +237,7 @@ void test_network_fetchlocal__fetchprune(void)
 
 	cl_git_pass(git_reference_list(&refnames, repo));
 	cl_assert_equal_i(18, (int)refnames.count);
-	git_strarray_free(&refnames);
+	git_strarray_dispose(&refnames);
 	git_remote_free(origin);
 
 	cl_git_pass(git_reference_lookup(&ref, remote_repo, "refs/heads/packed"));
@@ -253,7 +253,7 @@ void test_network_fetchlocal__fetchprune(void)
 
 	cl_git_pass(git_reference_list(&refnames, repo));
 	cl_assert_equal_i(17, (int)refnames.count);
-	git_strarray_free(&refnames);
+	git_strarray_dispose(&refnames);
 	git_remote_free(origin);
 
 	git_repository_free(repo);
@@ -333,13 +333,13 @@ void test_network_fetchlocal__partial(void)
 	cl_git_pass(git_remote_create(&origin, repo, GIT_REMOTE_ORIGIN, url));
 	cl_git_pass(git_remote_fetch(origin, NULL, &options, NULL));
 
-	git_strarray_free(&refnames);
+	git_strarray_dispose(&refnames);
 
 	cl_git_pass(git_reference_list(&refnames, repo));
 	cl_assert_equal_i(20, (int)refnames.count); /* 18 remote + 1 local */
 	cl_assert(callcount > 0);
 
-	git_strarray_free(&refnames);
+	git_strarray_dispose(&refnames);
 	git_remote_free(origin);
 }
 
@@ -420,7 +420,7 @@ void test_network_fetchlocal__multi_remotes(void)
 
 	cl_git_pass(git_reference_list(&refnames, repo));
 	cl_assert_equal_i(33, (int)refnames.count);
-	git_strarray_free(&refnames);
+	git_strarray_dispose(&refnames);
 
 	cl_git_pass(git_remote_set_url(repo, "test_with_pushurl", cl_git_fixture_url("testrepo.git")));
 	cl_git_pass(git_remote_lookup(&test2, repo, "test_with_pushurl"));
@@ -429,7 +429,7 @@ void test_network_fetchlocal__multi_remotes(void)
 	cl_git_pass(git_reference_list(&refnames, repo));
 	cl_assert_equal_i(45, (int)refnames.count);
 
-	git_strarray_free(&refnames);
+	git_strarray_dispose(&refnames);
 	git_remote_free(test);
 	git_remote_free(test2);
 }
diff --git a/tests/network/remote/remotes.c b/tests/network/remote/remotes.c
index a29281d37..0694a6f66 100644
--- a/tests/network/remote/remotes.c
+++ b/tests/network/remote/remotes.c
@@ -61,7 +61,7 @@ static int urlresolve_callback(git_buf *url_resolved, const char *url, int direc
 	cl_assert(strcmp(url, "git://github.com/libgit2/libgit2") == 0);
 	cl_assert(strcmp(payload, "payload") == 0);
 	cl_assert(url_resolved->size == 0);
-	
+
 	if (direction == GIT_DIRECTION_PUSH)
 		git_buf_sets(url_resolved, "pushresolve");
 	if (direction == GIT_DIRECTION_FETCH)
@@ -215,11 +215,11 @@ void test_network_remote_remotes__dup(void)
 	cl_git_pass(git_remote_get_fetch_refspecs(&array, _remote));
 	cl_assert_equal_i(1, (int)array.count);
 	cl_assert_equal_s("+refs/heads/*:refs/remotes/test/*", array.strings[0]);
-	git_strarray_free(&array);
+	git_strarray_dispose(&array);
 
 	cl_git_pass(git_remote_get_push_refspecs(&array, _remote));
 	cl_assert_equal_i(0, (int)array.count);
-	git_strarray_free(&array);
+	git_strarray_dispose(&array);
 
 	git_remote_free(dup);
 }
@@ -318,7 +318,7 @@ void test_network_remote_remotes__list(void)
 
 	cl_git_pass(git_remote_list(&list, _repo));
 	cl_assert(list.count == 5);
-	git_strarray_free(&list);
+	git_strarray_dispose(&list);
 
 	cl_git_pass(git_repository_config(&cfg, _repo));
 
@@ -330,7 +330,7 @@ void test_network_remote_remotes__list(void)
 
 	cl_git_pass(git_remote_list(&list, _repo));
 	cl_assert(list.count == 7);
-	git_strarray_free(&list);
+	git_strarray_dispose(&list);
 
 	git_config_free(cfg);
 }
@@ -466,13 +466,13 @@ void test_network_remote_remotes__query_refspecs(void)
 	for (i = 0; i < 3; i++) {
 		cl_assert_equal_s(fetch_refspecs[i], array.strings[i]);
 	}
-	git_strarray_free(&array);
+	git_strarray_dispose(&array);
 
 	cl_git_pass(git_remote_get_push_refspecs(&array, remote));
 	for (i = 0; i < 3; i++) {
 		cl_assert_equal_s(push_refspecs[i], array.strings[i]);
 	}
-	git_strarray_free(&array);
+	git_strarray_dispose(&array);
 
 	git_remote_free(remote);
 	git_remote_delete(_repo, "test");
diff --git a/tests/network/remote/rename.c b/tests/network/remote/rename.c
index 0449575d7..1fd2affba 100644
--- a/tests/network/remote/rename.c
+++ b/tests/network/remote/rename.c
@@ -25,7 +25,7 @@ void test_network_remote_rename__renaming_a_remote_moves_related_configuration_s
 
 	cl_git_pass(git_remote_rename(&problems, _repo, _remote_name, "just/renamed"));
 	cl_assert_equal_i(0, problems.count);
-	git_strarray_free(&problems);
+	git_strarray_dispose(&problems);
 
 	assert_config_entry_existence(_repo, "remote.test.fetch", false);
 	assert_config_entry_existence(_repo, "remote.just/renamed.fetch", true);
@@ -39,7 +39,7 @@ void test_network_remote_rename__renaming_a_remote_updates_branch_related_config
 
 	cl_git_pass(git_remote_rename(&problems, _repo, _remote_name, "just/renamed"));
 	cl_assert_equal_i(0, problems.count);
-	git_strarray_free(&problems);
+	git_strarray_dispose(&problems);
 
 	assert_config_entry_value(_repo, "branch.master.remote", "just/renamed");
 }
@@ -50,7 +50,7 @@ void test_network_remote_rename__renaming_a_remote_updates_default_fetchrefspec(
 
 	cl_git_pass(git_remote_rename(&problems, _repo, _remote_name, "just/renamed"));
 	cl_assert_equal_i(0, problems.count);
-	git_strarray_free(&problems);
+	git_strarray_dispose(&problems);
 
 	assert_config_entry_value(_repo, "remote.just/renamed.fetch", "+refs/heads/*:refs/remotes/just/renamed/*");
 }
@@ -71,7 +71,7 @@ void test_network_remote_rename__renaming_a_remote_without_a_fetchrefspec_doesnt
 
 	cl_git_pass(git_remote_rename(&problems, _repo, _remote_name, "just/renamed"));
 	cl_assert_equal_i(0, problems.count);
-	git_strarray_free(&problems);
+	git_strarray_dispose(&problems);
 
 	assert_config_entry_existence(_repo, "remote.just/renamed.fetch", false);
 }
@@ -90,11 +90,11 @@ void test_network_remote_rename__renaming_a_remote_notifies_of_non_default_fetch
 	cl_git_pass(git_remote_rename(&problems, _repo, _remote_name, "just/renamed"));
 	cl_assert_equal_i(1, problems.count);
 	cl_assert_equal_s("+refs/*:refs/*", problems.strings[0]);
-	git_strarray_free(&problems);
+	git_strarray_dispose(&problems);
 
 	assert_config_entry_value(_repo, "remote.just/renamed.fetch", "+refs/*:refs/*");
 
-	git_strarray_free(&problems);
+	git_strarray_dispose(&problems);
 }
 
 void test_network_remote_rename__new_name_can_contain_dots(void)
@@ -103,7 +103,7 @@ void test_network_remote_rename__new_name_can_contain_dots(void)
 
 	cl_git_pass(git_remote_rename(&problems, _repo, _remote_name, "just.renamed"));
 	cl_assert_equal_i(0, problems.count);
-	git_strarray_free(&problems);
+	git_strarray_dispose(&problems);
 	assert_config_entry_existence(_repo, "remote.just.renamed.fetch", true);
 }
 
@@ -126,7 +126,7 @@ void test_network_remote_rename__renamed_name_is_persisted(void)
 
 	cl_git_pass(git_remote_rename(&problems, _repo, _remote_name, "just/renamed"));
 	cl_assert_equal_i(0, problems.count);
-	git_strarray_free(&problems);
+	git_strarray_dispose(&problems);
 
 	cl_git_pass(git_repository_open(&another_repo, "testrepo.git"));
 	cl_git_pass(git_remote_lookup(&renamed, _repo, "just/renamed"));
@@ -154,7 +154,7 @@ void test_network_remote_rename__renaming_a_remote_moves_the_underlying_referenc
 
 	cl_git_pass(git_remote_rename(&problems, _repo, _remote_name, "just/renamed"));
 	cl_assert_equal_i(0, problems.count);
-	git_strarray_free(&problems);
+	git_strarray_dispose(&problems);
 
 	cl_assert_equal_i(GIT_ENOTFOUND, git_reference_lookup(&underlying, _repo, "refs/remotes/test/master"));
 	cl_git_pass(git_reference_lookup(&underlying, _repo, "refs/remotes/just/renamed/master"));
@@ -176,7 +176,7 @@ void test_network_remote_rename__overwrite_ref_in_target(void)
 
 	cl_git_pass(git_remote_rename(&problems, _repo, _remote_name, "renamed"));
 	cl_assert_equal_i(0, problems.count);
-	git_strarray_free(&problems);
+	git_strarray_dispose(&problems);
 
 	/* make sure there's only one remote-tracking branch */
 	cl_git_pass(git_branch_iterator_new(&iter, _repo, GIT_BRANCH_REMOTE));
@@ -214,7 +214,7 @@ void test_network_remote_rename__symref_head(void)
 
 	cl_git_pass(git_remote_rename(&problems, _repo, _remote_name, "renamed"));
 	cl_assert_equal_i(0, problems.count);
-	git_strarray_free(&problems);
+	git_strarray_dispose(&problems);
 
 	cl_git_pass(git_vector_init(&refs, 2, (git_vector_cmp) git_reference_cmp));
 	cl_git_pass(git_branch_iterator_new(&iter, _repo, GIT_BRANCH_REMOTE));
diff --git a/tests/object/commit/commitstagedfile.c b/tests/object/commit/commitstagedfile.c
index 63ecfeebe..f7ff05c01 100644
--- a/tests/object/commit/commitstagedfile.c
+++ b/tests/object/commit/commitstagedfile.c
@@ -49,9 +49,9 @@ void test_object_commit_commitstagedfile__generate_predictable_object_ids(void)
 	 * tree 2b297e643c551e76cfa1f93810c50811382f9117
 	 * author nulltoken <emeric.fermas@gmail.com> 1323847743 +0100
 	 * committer nulltoken <emeric.fermas@gmail.com> 1323847743 +0100
-	 * 
+	 *
 	 *     Initial commit
-	 * 
+	 *
 	 * diff --git a/test.txt b/test.txt
 	 * new file mode 100644
 	 * index 0000000..9daeafb
@@ -141,14 +141,14 @@ static void assert_commit_tree_has_n_entries(git_commit *c, int count)
 	git_tree_free(tree);
 }
 
-static void assert_commit_is_head_(git_commit *c, const char *file, int line)
+static void assert_commit_is_head_(git_commit *c, const char *file, const char *func, int line)
 {
 	git_commit *head;
 	cl_git_pass(git_revparse_single((git_object **)&head, repo, "HEAD"));
-	clar__assert(git_oid_equal(git_commit_id(c), git_commit_id(head)), file, line, "Commit is not the HEAD", NULL, 1);
+	clar__assert(git_oid_equal(git_commit_id(c), git_commit_id(head)), file, func, line, "Commit is not the HEAD", NULL, 1);
 	git_commit_free(head);
 }
-#define assert_commit_is_head(C) assert_commit_is_head_((C),__FILE__,__LINE__)
+#define assert_commit_is_head(C) assert_commit_is_head_((C),__FILE__,__func__,__LINE__)
 
 void test_object_commit_commitstagedfile__amend_commit(void)
 {
diff --git a/tests/object/tag/list.c b/tests/object/tag/list.c
index b8d507fe7..8a1a2d26d 100644
--- a/tests/object/tag/list.c
+++ b/tests/object/tag/list.c
@@ -50,7 +50,7 @@ static void ensure_tag_pattern_match(git_repository *repo,
 	cl_assert_equal_i((int)sucessfully_found, (int)data->expected_matches);
 
 exit:
-	git_strarray_free(&tag_list);
+	git_strarray_dispose(&tag_list);
 	cl_git_pass(error);
 }
 
@@ -74,7 +74,7 @@ void test_object_tag_list__list_all(void)
 
 	cl_assert_equal_i((int)tag_list.count, 6);
 
-	git_strarray_free(&tag_list);
+	git_strarray_dispose(&tag_list);
 }
 
 static const struct pattern_match_t matches[] = {
diff --git a/tests/object/tree/write.c b/tests/object/tree/write.c
index 7b0b8caca..1bc5a50a0 100644
--- a/tests/object/tree/write.c
+++ b/tests/object/tree/write.c
@@ -453,7 +453,8 @@ static void test_invalid_objects(bool should_allow_invalid)
 	git_oid valid_blob_id, invalid_blob_id, valid_tree_id, invalid_tree_id;
 
 #define assert_allowed(expr) \
-	clar__assert(!(expr) == should_allow_invalid, __FILE__, __LINE__, \
+	clar__assert(!(expr) == should_allow_invalid, \
+		__FILE__, __func__, __LINE__, \
 		(should_allow_invalid ? \
 		 "Expected function call to succeed: " #expr : \
 		 "Expected function call to fail: " #expr), \
diff --git a/tests/online/clone.c b/tests/online/clone.c
index 9107956bd..c62baac2d 100644
--- a/tests/online/clone.c
+++ b/tests/online/clone.c
@@ -176,7 +176,7 @@ static int fetch_progress(const git_indexer_progress *stats, void *payload)
 void test_online_clone__can_checkout_a_cloned_repo(void)
 {
 	git_buf path = GIT_BUF_INIT;
-	git_reference *head;
+	git_reference *head, *remote_head;
 	bool checkout_progress_cb_was_called = false,
 		  fetch_progress_cb_was_called = false;
 
@@ -195,9 +195,14 @@ void test_online_clone__can_checkout_a_cloned_repo(void)
 	cl_assert_equal_i(GIT_REFERENCE_SYMBOLIC, git_reference_type(head));
 	cl_assert_equal_s("refs/heads/master", git_reference_symbolic_target(head));
 
+	cl_git_pass(git_reference_lookup(&remote_head, g_repo, "refs/remotes/origin/HEAD"));
+	cl_assert_equal_i(GIT_REFERENCE_SYMBOLIC, git_reference_type(remote_head));
+	cl_assert_equal_s("refs/remotes/origin/master", git_reference_symbolic_target(remote_head));
+
 	cl_assert_equal_i(true, checkout_progress_cb_was_called);
 	cl_assert_equal_i(true, fetch_progress_cb_was_called);
 
+	git_reference_free(remote_head);
 	git_reference_free(head);
 	git_buf_dispose(&path);
 }
diff --git a/tests/online/fetchhead.c b/tests/online/fetchhead.c
index 32e7419ae..b61993138 100644
--- a/tests/online/fetchhead.c
+++ b/tests/online/fetchhead.c
@@ -43,7 +43,7 @@ static size_t count_references(void)
 	cl_git_pass(git_reference_list(&array, g_repo));
 	refs = array.count;
 
-	git_strarray_free(&array);
+	git_strarray_dispose(&array);
 
 	return refs;
 }
diff --git a/tests/online/remotes.c b/tests/online/remotes.c
index d79eb1f59..f7fe4142f 100644
--- a/tests/online/remotes.c
+++ b/tests/online/remotes.c
@@ -32,7 +32,7 @@ void test_online_remotes__single_branch(void)
 	}
 	cl_assert_equal_i(1, count);
 
-	git_strarray_free(&refs);
+	git_strarray_dispose(&refs);
 
 	cl_git_pass(git_remote_lookup(&remote, repo, "origin"));
 	cl_git_pass(git_remote_get_fetch_refspecs(&refs, remote));
@@ -40,7 +40,7 @@ void test_online_remotes__single_branch(void)
 	cl_assert_equal_i(1, refs.count);
 	cl_assert_equal_s(REFSPEC, refs.strings[0]);
 
-	git_strarray_free(&refs);
+	git_strarray_dispose(&refs);
 	git_remote_free(remote);
 	git_repository_free(repo);
 }
diff --git a/tests/pack/filelimit.c b/tests/pack/filelimit.c
new file mode 100644
index 000000000..044679f3b
--- /dev/null
+++ b/tests/pack/filelimit.c
@@ -0,0 +1,136 @@
+#include "clar_libgit2.h"
+#include "mwindow.h"
+#include "global.h"
+
+#include <git2.h>
+#include "git2/sys/commit.h"
+#include "git2/sys/mempack.h"
+
+static size_t expected_open_mwindow_files = 0;
+static size_t original_mwindow_file_limit = 0;
+
+extern git_mwindow_ctl git_mwindow__mem_ctl;
+
+void test_pack_filelimit__initialize_tiny(void)
+{
+	expected_open_mwindow_files = 1;
+	cl_git_pass(git_libgit2_opts(GIT_OPT_GET_MWINDOW_FILE_LIMIT, &original_mwindow_file_limit));
+	cl_git_pass(git_libgit2_opts(GIT_OPT_SET_MWINDOW_FILE_LIMIT, expected_open_mwindow_files));
+}
+
+void test_pack_filelimit__initialize_medium(void)
+{
+	expected_open_mwindow_files = 10;
+	cl_git_pass(git_libgit2_opts(GIT_OPT_GET_MWINDOW_FILE_LIMIT, &original_mwindow_file_limit));
+	cl_git_pass(git_libgit2_opts(GIT_OPT_SET_MWINDOW_FILE_LIMIT, expected_open_mwindow_files));
+}
+
+void test_pack_filelimit__initialize_unlimited(void)
+{
+	expected_open_mwindow_files = 15;
+	cl_git_pass(git_libgit2_opts(GIT_OPT_GET_MWINDOW_FILE_LIMIT, &original_mwindow_file_limit));
+	cl_git_pass(git_libgit2_opts(GIT_OPT_SET_MWINDOW_FILE_LIMIT, 0));
+}
+
+void test_pack_filelimit__cleanup(void)
+{
+	git_buf path = GIT_BUF_INIT;
+	cl_git_pass(git_libgit2_opts(GIT_OPT_SET_MWINDOW_FILE_LIMIT, original_mwindow_file_limit));
+
+	cl_git_pass(git_buf_joinpath(&path, clar_sandbox_path(), "repo.git"));
+	cl_fixture_cleanup(path.ptr);
+	git_buf_dispose(&path);
+}
+
+/*
+ * Create a packfile with one commit, one tree, and two blobs. The first blob
+ * (README.md) has the same content in all commits, but the second one
+ * (file.txt) has a different content in each commit.
+ */
+void create_packfile_commit(
+		git_repository *repo,
+		git_oid *out_commit_id,
+		git_oid *parent_id,
+		size_t commit_index,
+		size_t commit_count)
+{
+	git_buf file_contents = GIT_BUF_INIT;
+	git_treebuilder *treebuilder;
+	git_packbuilder *packbuilder;
+	git_signature *s;
+	git_oid oid, tree_id, commit_id;
+	const git_oid *parents[] = { parent_id };
+	size_t parent_count = parent_id ? 1 : 0;
+
+	cl_git_pass(git_treebuilder_new(&treebuilder, repo, NULL));
+
+	cl_git_pass(git_blob_create_from_buffer(&oid, repo, "", 0));
+	cl_git_pass(git_treebuilder_insert(NULL, treebuilder, "README.md", &oid, 0100644));
+
+	cl_git_pass(git_buf_printf(&file_contents, "Commit %zd/%zd", commit_index, commit_count));
+	cl_git_pass(git_blob_create_from_buffer(&oid, repo, file_contents.ptr, file_contents.size));
+	cl_git_pass(git_treebuilder_insert(NULL, treebuilder, "file.txt", &oid, 0100644));
+
+	cl_git_pass(git_treebuilder_write(&tree_id, treebuilder));
+	cl_git_pass(git_signature_now(&s, "alice", "alice@example.com"));
+	cl_git_pass(git_commit_create_from_ids(&commit_id, repo, "refs/heads/master", s, s,
+			NULL, file_contents.ptr, &tree_id, parent_count, parents));
+
+	cl_git_pass(git_packbuilder_new(&packbuilder, repo));
+	cl_git_pass(git_packbuilder_insert_commit(packbuilder, &commit_id));
+	cl_git_pass(git_packbuilder_write(packbuilder, NULL, 0, NULL, NULL));
+
+	cl_git_pass(git_oid_cpy(out_commit_id, &commit_id));
+
+	git_buf_dispose(&file_contents);
+	git_treebuilder_free(treebuilder);
+	git_packbuilder_free(packbuilder);
+	git_signature_free(s);
+}
+
+void test_pack_filelimit__open_repo_with_multiple_packfiles(void)
+{
+	git_buf path = GIT_BUF_INIT;
+	git_mwindow_ctl *ctl = &git_mwindow__mem_ctl;
+	git_repository *repo;
+	git_revwalk *walk;
+	git_oid id, *parent_id = NULL;
+	size_t i;
+	const size_t commit_count = 16;
+	unsigned int open_windows;
+
+	/*
+	 * Create a repository and populate it with 16 commits, each in its own
+	 * packfile.
+	 */
+	cl_git_pass(git_buf_joinpath(&path, clar_sandbox_path(), "repo.git"));
+	cl_git_pass(git_repository_init(&repo, path.ptr, true));
+	for (i = 0; i < commit_count; ++i) {
+		create_packfile_commit(repo, &id, parent_id, i + 1, commit_count);
+		parent_id = &id;
+	}
+
+	cl_git_pass(git_revwalk_new(&walk, repo));
+	cl_git_pass(git_revwalk_sorting(walk, GIT_SORT_TOPOLOGICAL));
+	cl_git_pass(git_revwalk_push_ref(walk, "refs/heads/master"));
+
+	/* Walking the repository requires eventually opening each of the packfiles. */
+	i = 0;
+	while (git_revwalk_next(&id, walk) == 0)
+		++i;
+	cl_assert_equal_i(commit_count, i);
+
+	cl_git_pass(git_mutex_lock(&git__mwindow_mutex));
+	/*
+	 * Adding an assert while holding a lock will cause the whole process to
+	 * deadlock. Copy the value and do the assert after releasing the lock.
+	 */
+	open_windows = ctl->open_windows;
+	cl_git_pass(git_mutex_unlock(&git__mwindow_mutex));
+
+	cl_assert_equal_i(expected_open_mwindow_files, open_windows);
+
+	git_buf_dispose(&path);
+	git_revwalk_free(walk);
+	git_repository_free(repo);
+}
diff --git a/tests/pack/midx.c b/tests/pack/midx.c
new file mode 100644
index 000000000..1f47d9502
--- /dev/null
+++ b/tests/pack/midx.c
@@ -0,0 +1,29 @@
+#include "clar_libgit2.h"
+
+#include <git2.h>
+
+#include "midx.h"
+
+void test_pack_midx__parse(void)
+{
+	git_repository *repo;
+	struct git_midx_file *idx;
+	struct git_midx_entry e;
+	git_oid id;
+	git_buf midx_path = GIT_BUF_INIT;
+
+	cl_git_pass(git_repository_open(&repo, cl_fixture("testrepo.git")));
+	cl_git_pass(git_buf_joinpath(&midx_path, git_repository_path(repo), "objects/pack/multi-pack-index"));
+	cl_git_pass(git_midx_open(&idx, git_buf_cstr(&midx_path)));
+
+	cl_git_pass(git_oid_fromstr(&id, "5001298e0c09ad9c34e4249bc5801c75e9754fa5"));
+	cl_git_pass(git_midx_entry_find(&e, idx, &id, GIT_OID_HEXSZ));
+	cl_assert_equal_oid(&e.sha1, &id);
+	cl_assert_equal_s(
+			(const char *)git_vector_get(&idx->packfile_names, e.pack_index),
+			"pack-d7c6adf9f61318f041845b01440d09aa7a91e1b5.idx");
+
+	git_midx_free(idx);
+	git_repository_free(repo);
+	git_buf_dispose(&midx_path);
+}
diff --git a/tests/pack/packbuilder.c b/tests/pack/packbuilder.c
index 32f061232..5f5441a5d 100644
--- a/tests/pack/packbuilder.c
+++ b/tests/pack/packbuilder.c
@@ -151,6 +151,15 @@ void test_pack_packbuilder__get_hash(void)
 	cl_assert_equal_s(hex, "7f5fa362c664d68ba7221259be1cbd187434b2f0");
 }
 
+void test_pack_packbuilder__write_default_path(void)
+{
+	seed_packbuilder();
+
+	cl_git_pass(git_packbuilder_write(_packbuilder, NULL, 0, NULL, NULL));
+	cl_assert(git_path_exists("objects/pack/pack-7f5fa362c664d68ba7221259be1cbd187434b2f0.idx"));
+	cl_assert(git_path_exists("objects/pack/pack-7f5fa362c664d68ba7221259be1cbd187434b2f0.pack"));
+}
+
 static void test_write_pack_permission(mode_t given, mode_t expected)
 {
 	struct stat statbuf;
diff --git a/tests/patch/patch_common.h b/tests/patch/patch_common.h
index 731524767..1e03889fc 100644
--- a/tests/patch/patch_common.h
+++ b/tests/patch/patch_common.h
@@ -579,6 +579,14 @@
 	"rename from file.txt\n" \
 	"rename to newfile.txt\n"
 
+#define PATCH_RENAME_EXACT_WITH_MODE \
+	"diff --git a/RENAMED.md b/README.md\n" \
+	"old mode 100644\n" \
+	"new mode 100755\n" \
+	"similarity index 100%\n" \
+	"rename from RENAMED.md\n" \
+	"rename to README.md\n"
+
 #define PATCH_RENAME_SIMILAR \
 	"diff --git a/file.txt b/newfile.txt\n" \
 	"similarity index 77%\n" \
diff --git a/tests/patch/print.c b/tests/patch/print.c
index c4ff479e9..b0a933943 100644
--- a/tests/patch/print.c
+++ b/tests/patch/print.c
@@ -107,6 +107,12 @@ void test_patch_print__rename_exact(void)
 		strlen(PATCH_RENAME_EXACT));
 }
 
+void test_patch_print__rename_exact_with_mode(void)
+{
+	patch_print_from_patchfile(PATCH_RENAME_EXACT_WITH_MODE,
+		strlen(PATCH_RENAME_EXACT_WITH_MODE));
+}
+
 void test_patch_print__rename_similar(void)
 {
 	patch_print_from_patchfile(PATCH_RENAME_SIMILAR,
diff --git a/tests/refs/create.c b/tests/refs/create.c
index 20ac579b3..01eb62a52 100644
--- a/tests/refs/create.c
+++ b/tests/refs/create.c
@@ -212,17 +212,12 @@ void test_refs_create__oid_unknown_fails_by_default(void)
 
 void test_refs_create__propagate_eexists(void)
 {
-	int error;
 	git_oid oid;
-	git_reference *ref;
 
 	/* Make sure it works for oid and for symbolic both */
-	git_oid_fromstr(&oid, current_master_tip);
-	error = git_reference_create(&ref, g_repo, current_head_target, &oid, false, NULL);
-	cl_assert(error == GIT_EEXISTS);
-
-	error = git_reference_symbolic_create(&ref, g_repo, "HEAD", current_head_target, false, NULL);
-	cl_assert(error == GIT_EEXISTS);
+	cl_git_pass(git_oid_fromstr(&oid, current_master_tip));
+	cl_git_fail_with(GIT_EEXISTS, git_reference_create(NULL, g_repo, current_head_target, &oid, false, NULL));
+	cl_git_fail_with(GIT_EEXISTS, git_reference_symbolic_create(NULL, g_repo, "HEAD", current_head_target, false, NULL));
 }
 
 void test_refs_create__existing_dir_propagates_edirectory(void)
diff --git a/tests/refs/list.c b/tests/refs/list.c
index 725d38161..8085ff84b 100644
--- a/tests/refs/list.c
+++ b/tests/refs/list.c
@@ -38,7 +38,7 @@ void test_refs_list__all(void)
 	 * loose, but we only list it once */
 	cl_assert_equal_i((int)ref_list.count, 19);
 
-	git_strarray_free(&ref_list);
+	git_strarray_dispose(&ref_list);
 }
 
 void test_refs_list__do_not_retrieve_references_which_name_end_with_a_lock_extension(void)
@@ -53,5 +53,5 @@ void test_refs_list__do_not_retrieve_references_which_name_end_with_a_lock_exten
 	cl_git_pass(git_reference_list(&ref_list, g_repo));
 	cl_assert_equal_i((int)ref_list.count, 19);
 
-	git_strarray_free(&ref_list);
+	git_strarray_dispose(&ref_list);
 }
diff --git a/tests/refs/listall.c b/tests/refs/listall.c
index c696fbb2e..9da8d1ac3 100644
--- a/tests/refs/listall.c
+++ b/tests/refs/listall.c
@@ -16,7 +16,7 @@ static void ensure_no_refname_starts_with_a_forward_slash(const char *path)
 	for (i = 0; i < ref_list.count; i++)
 		cl_assert(git__prefixcmp(ref_list.strings[i], "/") != 0);
 
-	git_strarray_free(&ref_list);
+	git_strarray_dispose(&ref_list);
 	git_repository_free(repo);
 }
 
@@ -42,6 +42,6 @@ void test_refs_listall__from_repository_with_no_trailing_newline(void)
 
 	cl_assert(ref_list.count > 0);
 
-	git_strarray_free(&ref_list);
+	git_strarray_dispose(&ref_list);
 	git_repository_free(repo);
 }
diff --git a/tests/refs/namespaces.c b/tests/refs/namespaces.c
index bb6bb1ce0..19456b5a4 100644
--- a/tests/refs/namespaces.c
+++ b/tests/refs/namespaces.c
@@ -32,5 +32,5 @@ void test_refs_namespaces__namespace_doesnt_show_normal_refs(void)
 	cl_git_pass(git_repository_set_namespace(g_repo, "namespace"));
 	cl_git_pass(git_reference_list(&ref_list, g_repo));
 	cl_assert_equal_i(0, ref_list.count);
-	git_strarray_free(&ref_list);
+	git_strarray_dispose(&ref_list);
 }
diff --git a/tests/refs/reflog/messages.c b/tests/refs/reflog/messages.c
index 43f59a84b..53b8c6f3e 100644
--- a/tests/refs/reflog/messages.c
+++ b/tests/refs/reflog/messages.c
@@ -24,11 +24,8 @@ void test_refs_reflog_messages__cleanup(void)
 void test_refs_reflog_messages__setting_head_updates_reflog(void)
 {
 	git_object *tag;
-	git_signature *sig;
 	git_annotated_commit *annotated;
 
-	cl_git_pass(git_signature_now(&sig, "me", "foo@example.com"));
-
 	cl_git_pass(git_repository_set_head(g_repo, "refs/heads/haacked")); /* 4 */
 	cl_git_pass(git_repository_set_head(g_repo, "refs/heads/unborn"));
 	cl_git_pass(git_revparse_single(&tag, g_repo, "tags/test"));
@@ -68,7 +65,6 @@ void test_refs_reflog_messages__setting_head_updates_reflog(void)
 
 	git_annotated_commit_free(annotated);
 	git_object_free(tag);
-	git_signature_free(sig);
 }
 
 void test_refs_reflog_messages__setting_head_to_same_target_ignores_reflog(void)
@@ -87,12 +83,9 @@ void test_refs_reflog_messages__setting_head_to_same_target_ignores_reflog(void)
 
 void test_refs_reflog_messages__detaching_writes_reflog(void)
 {
-	git_signature *sig;
 	git_oid id;
 	const char *msg;
 
-	cl_git_pass(git_signature_now(&sig, "me", "foo@example.com"));
-
 	msg = "checkout: moving from master to e90810b8df3e80c413d903f631643c716887138d";
 	git_oid_fromstr(&id, "e90810b8df3e80c413d903f631643c716887138d");
 	cl_git_pass(git_repository_set_head_detached(g_repo, &id));
@@ -107,8 +100,6 @@ void test_refs_reflog_messages__detaching_writes_reflog(void)
 		"e90810b8df3e80c413d903f631643c716887138d",
 		"258f0e2a959a364e40ed6603d5d44fbb24765b10",
 		NULL, msg);
-
-	git_signature_free(sig);
 }
 
 void test_refs_reflog_messages__orphan_branch_does_not_count(void)
diff --git a/tests/refs/reflog/reflog_helpers.c b/tests/refs/reflog/reflog_helpers.c
index 6eba8ecf9..aecb78b02 100644
--- a/tests/refs/reflog/reflog_helpers.c
+++ b/tests/refs/reflog/reflog_helpers.c
@@ -29,7 +29,8 @@ size_t reflog_entrycount(git_repository *repo, const char *name)
 
 void cl_reflog_check_entry_(git_repository *repo, const char *reflog, size_t idx,
 	const char *old_spec, const char *new_spec,
-	const char *email, const char *message, const char *file, int line)
+	const char *email, const char *message,
+	const char *file, const char *func, int line)
 {
 	git_reflog *log;
 	const git_reflog_entry *entry;
@@ -38,7 +39,7 @@ void cl_reflog_check_entry_(git_repository *repo, const char *reflog, size_t idx
 	cl_git_pass(git_reflog_read(&log, repo, reflog));
 	entry = git_reflog_entry_byindex(log, idx);
 	if (entry == NULL)
-		clar__fail(file, line, "Reflog has no such entry", NULL, 1);
+		clar__fail(file, func, line, "Reflog has no such entry", NULL, 1);
 
 	if (old_spec) {
 		git_object *obj = NULL;
@@ -92,7 +93,7 @@ void cl_reflog_check_entry_(git_repository *repo, const char *reflog, size_t idx
 			git_buf_printf(&result, "\tMessage: \"%s\" != \"%s\"\n", message, entry_msg);
 	}
 	if (git_buf_len(&result) != 0)
-		clar__fail(file, line, "Reflog entry mismatch", git_buf_cstr(&result), 1);
+		clar__fail(file, func, line, "Reflog entry mismatch", git_buf_cstr(&result), 1);
 
 	git_buf_dispose(&result);
 	git_reflog_free(log);
diff --git a/tests/remote/create.c b/tests/remote/create.c
index 510962314..f92be9dfc 100644
--- a/tests/remote/create.c
+++ b/tests/remote/create.c
@@ -117,7 +117,7 @@ void test_remote_create__with_fetchspec(void)
 	cl_assert_equal_i(1, array.count);
 	cl_assert_equal_i(section_count + 2, count_config_entries_match(_repo, "remote\\."));
 
-	git_strarray_free(&array);
+	git_strarray_dispose(&array);
 	git_remote_free(remote);
 }
 
@@ -132,7 +132,7 @@ void test_remote_create__with_empty_fetchspec(void)
 	cl_assert_equal_i(0, array.count);
 	cl_assert_equal_i(section_count + 1, count_config_entries_match(_repo, "remote\\."));
 
-	git_strarray_free(&array);
+	git_strarray_dispose(&array);
 	git_remote_free(remote);
 }
 
@@ -167,7 +167,7 @@ void test_remote_create__anonymous(void)
 	cl_assert_equal_i(0, array.count);
 	cl_assert_equal_i(section_count, count_config_entries_match(_repo, "remote\\."));
 
-	git_strarray_free(&array);
+	git_strarray_dispose(&array);
 	git_remote_free(remote);
 }
 
@@ -195,7 +195,7 @@ void test_remote_create__detached(void)
 	cl_assert_equal_i(0, array.count);
 	cl_assert_equal_i(section_count, count_config_entries_match(_repo, "remote\\."));
 
-	git_strarray_free(&array);
+	git_strarray_dispose(&array);
 	git_remote_free(remote);
 }
 
@@ -225,7 +225,7 @@ void test_remote_create__with_opts_named(void)
 	cl_assert_equal_i(1, array.count);
 	cl_assert_equal_s("+refs/heads/*:refs/remotes/test-new/*", array.strings[0]);
 
-	git_strarray_free(&array);
+	git_strarray_dispose(&array);
 	git_remote_free(remote);
 }
 
@@ -248,7 +248,7 @@ void test_remote_create__with_opts_named_and_fetchspec(void)
 	cl_assert_equal_i(1, array.count);
 	cl_assert_equal_s("+refs/*:refs/*", array.strings[0]);
 
-	git_strarray_free(&array);
+	git_strarray_dispose(&array);
 	git_remote_free(remote);
 }
 
@@ -270,7 +270,7 @@ void test_remote_create__with_opts_named_no_fetchspec(void)
 	cl_git_pass(git_remote_get_fetch_refspecs(&array, remote));
 	cl_assert_equal_i(0, array.count);
 
-	git_strarray_free(&array);
+	git_strarray_dispose(&array);
 	git_remote_free(remote);
 }
 
@@ -290,7 +290,7 @@ void test_remote_create__with_opts_anonymous(void)
 	cl_git_pass(git_remote_get_fetch_refspecs(&array, remote));
 	cl_assert_equal_i(0, array.count);
 
-	git_strarray_free(&array);
+	git_strarray_dispose(&array);
 	git_remote_free(remote);
 }
 
@@ -308,7 +308,7 @@ void test_remote_create__with_opts_detached(void)
 	cl_git_pass(git_remote_get_fetch_refspecs(&array, remote));
 	cl_assert_equal_i(0, array.count);
 
-	git_strarray_free(&array);
+	git_strarray_dispose(&array);
 
 	git_remote_free(remote);
 
@@ -320,7 +320,7 @@ void test_remote_create__with_opts_detached(void)
 	cl_git_pass(git_remote_get_fetch_refspecs(&array, remote));
 	cl_assert_equal_i(0, array.count);
 
-	git_strarray_free(&array);
+	git_strarray_dispose(&array);
 
 	git_remote_free(remote);
 }
diff --git a/tests/remote/list.c b/tests/remote/list.c
index 5abb95106..4a6be3d1b 100644
--- a/tests/remote/list.c
+++ b/tests/remote/list.c
@@ -25,17 +25,17 @@ void test_remote_list__always_checks_disk_config(void)
 
 	cl_git_pass(git_remote_list(&remotes, _repo));
 	cl_assert_equal_sz(remotes.count, 1);
-	git_strarray_free(&remotes);
+	git_strarray_dispose(&remotes);
 
 	cl_git_pass(git_remote_create(&remote, _repo, "valid-name", TEST_URL));
 
 	cl_git_pass(git_remote_list(&remotes, _repo));
 	cl_assert_equal_sz(remotes.count, 2);
-	git_strarray_free(&remotes);
+	git_strarray_dispose(&remotes);
 
 	cl_git_pass(git_remote_list(&remotes, repo));
 	cl_assert_equal_sz(remotes.count, 2);
-	git_strarray_free(&remotes);
+	git_strarray_dispose(&remotes);
 
 	git_repository_free(repo);
 	git_remote_free(remote);
diff --git a/tests/repo/env.c b/tests/repo/env.c
index 024661692..43defc168 100644
--- a/tests/repo/env.c
+++ b/tests/repo/env.c
@@ -53,44 +53,44 @@ static int GIT_FORMAT_PRINTF(2, 3) cl_setenv_printf(const char *name, const char
  * from the caller rather than those of the helper. The expression strings
  * distinguish between the possible failures within the helper. */
 
-static void env_pass_(const char *path, const char *file, int line)
+static void env_pass_(const char *path, const char *file, const char *func, int line)
 {
 	git_repository *repo;
-	cl_git_expect(git_repository_open_ext(NULL, path, GIT_REPOSITORY_OPEN_FROM_ENV, NULL), 0, file, line);
-	cl_git_expect(git_repository_open_ext(&repo, path, GIT_REPOSITORY_OPEN_FROM_ENV, NULL), 0, file, line);
-	cl_assert_at_line(git__suffixcmp(git_repository_path(repo), "attr/.git/") == 0, file, line);
-	cl_assert_at_line(git__suffixcmp(git_repository_workdir(repo), "attr/") == 0, file, line);
-	cl_assert_at_line(!git_repository_is_bare(repo), file, line);
+	cl_git_expect(git_repository_open_ext(NULL, path, GIT_REPOSITORY_OPEN_FROM_ENV, NULL), 0, file, func, line);
+	cl_git_expect(git_repository_open_ext(&repo, path, GIT_REPOSITORY_OPEN_FROM_ENV, NULL), 0, file, func, line);
+	cl_assert_at_line(git__suffixcmp(git_repository_path(repo), "attr/.git/") == 0, file, func, line);
+	cl_assert_at_line(git__suffixcmp(git_repository_workdir(repo), "attr/") == 0, file, func, line);
+	cl_assert_at_line(!git_repository_is_bare(repo), file, func, line);
 	git_repository_free(repo);
 }
-#define env_pass(path) env_pass_((path), __FILE__, __LINE__)
+#define env_pass(path) env_pass_((path), __FILE__, __func__, __LINE__)
 
-#define cl_git_fail_at_line(expr, file, line) clar__assert((expr) < 0, file, line, "Expected function call to fail: " #expr, NULL, 1)
+#define cl_git_fail_at_line(expr, file, func, line) clar__assert((expr) < 0, file, func, line, "Expected function call to fail: " #expr, NULL, 1)
 
-static void env_fail_(const char *path, const char *file, int line)
+static void env_fail_(const char *path, const char *file, const char *func, int line)
 {
 	git_repository *repo;
-	cl_git_fail_at_line(git_repository_open_ext(NULL, path, GIT_REPOSITORY_OPEN_FROM_ENV, NULL), file, line);
-	cl_git_fail_at_line(git_repository_open_ext(&repo, path, GIT_REPOSITORY_OPEN_FROM_ENV, NULL), file, line);
+	cl_git_fail_at_line(git_repository_open_ext(NULL, path, GIT_REPOSITORY_OPEN_FROM_ENV, NULL), file, func, line);
+	cl_git_fail_at_line(git_repository_open_ext(&repo, path, GIT_REPOSITORY_OPEN_FROM_ENV, NULL), file, func, line);
 }
-#define env_fail(path) env_fail_((path), __FILE__, __LINE__)
+#define env_fail(path) env_fail_((path), __FILE__, __func__, __LINE__)
 
 static void env_cd_(
 	const char *path,
-	void (*passfail_)(const char *, const char *, int),
-	const char *file, int line)
+	void (*passfail_)(const char *, const char *, const char *, int),
+	const char *file, const char *func, int line)
 {
 	git_buf cwd_buf = GIT_BUF_INIT;
 	cl_git_pass(git_path_prettify_dir(&cwd_buf, ".", NULL));
 	cl_must_pass(p_chdir(path));
-	passfail_(NULL, file, line);
+	passfail_(NULL, file, func, line);
 	cl_must_pass(p_chdir(git_buf_cstr(&cwd_buf)));
 	git_buf_dispose(&cwd_buf);
 }
-#define env_cd_pass(path) env_cd_((path), env_pass_, __FILE__, __LINE__)
-#define env_cd_fail(path) env_cd_((path), env_fail_, __FILE__, __LINE__)
+#define env_cd_pass(path) env_cd_((path), env_pass_, __FILE__, __func__, __LINE__)
+#define env_cd_fail(path) env_cd_((path), env_fail_, __FILE__, __func__, __LINE__)
 
-static void env_check_objects_(bool a, bool t, bool p, const char *file, int line)
+static void env_check_objects_(bool a, bool t, bool p, const char *file, const char *func, int line)
 {
 	git_repository *repo;
 	git_oid oid_a, oid_t, oid_p;
@@ -98,32 +98,32 @@ static void env_check_objects_(bool a, bool t, bool p, const char *file, int lin
 	cl_git_pass(git_oid_fromstr(&oid_a, "45141a79a77842c59a63229403220a4e4be74e3d"));
 	cl_git_pass(git_oid_fromstr(&oid_t, "1385f264afb75a56a5bec74243be9b367ba4ca08"));
 	cl_git_pass(git_oid_fromstr(&oid_p, "0df1a5865c8abfc09f1f2182e6a31be550e99f07"));
-	cl_git_expect(git_repository_open_ext(&repo, "attr", GIT_REPOSITORY_OPEN_FROM_ENV, NULL), 0, file, line);
+	cl_git_expect(git_repository_open_ext(&repo, "attr", GIT_REPOSITORY_OPEN_FROM_ENV, NULL), 0, file, func, line);
 
 	if (a) {
-		cl_git_expect(git_object_lookup(&object, repo, &oid_a, GIT_OBJECT_BLOB), 0, file, line);
+		cl_git_expect(git_object_lookup(&object, repo, &oid_a, GIT_OBJECT_BLOB), 0, file, func, line);
 		git_object_free(object);
 	} else {
-		cl_git_fail_at_line(git_object_lookup(&object, repo, &oid_a, GIT_OBJECT_BLOB), file, line);
+		cl_git_fail_at_line(git_object_lookup(&object, repo, &oid_a, GIT_OBJECT_BLOB), file, func, line);
 	}
 
 	if (t) {
-		cl_git_expect(git_object_lookup(&object, repo, &oid_t, GIT_OBJECT_BLOB), 0, file, line);
+		cl_git_expect(git_object_lookup(&object, repo, &oid_t, GIT_OBJECT_BLOB), 0, file, func, line);
 		git_object_free(object);
 	} else {
-		cl_git_fail_at_line(git_object_lookup(&object, repo, &oid_t, GIT_OBJECT_BLOB), file, line);
+		cl_git_fail_at_line(git_object_lookup(&object, repo, &oid_t, GIT_OBJECT_BLOB), file, func, line);
 	}
 
 	if (p) {
-		cl_git_expect(git_object_lookup(&object, repo, &oid_p, GIT_OBJECT_COMMIT), 0, file, line);
+		cl_git_expect(git_object_lookup(&object, repo, &oid_p, GIT_OBJECT_COMMIT), 0, file, func, line);
 		git_object_free(object);
 	} else {
-		cl_git_fail_at_line(git_object_lookup(&object, repo, &oid_p, GIT_OBJECT_COMMIT), file, line);
+		cl_git_fail_at_line(git_object_lookup(&object, repo, &oid_p, GIT_OBJECT_COMMIT), file, func, line);
 	}
 
 	git_repository_free(repo);
 }
-#define env_check_objects(a, t, t2) env_check_objects_((a), (t), (t2), __FILE__, __LINE__)
+#define env_check_objects(a, t, t2) env_check_objects_((a), (t), (t2), __FILE__, __func__, __LINE__)
 
 void test_repo_env__open(void)
 {
diff --git a/tests/repo/init.c b/tests/repo/init.c
index 5a95229e6..ba00d2918 100644
--- a/tests/repo/init.c
+++ b/tests/repo/init.c
@@ -665,3 +665,19 @@ void test_repo_init__unwriteable_directory(void)
 	clar__skip();
 #endif
 }
+
+void test_repo_init__defaultbranch_config(void)
+{
+	git_reference *head;
+
+	cl_set_cleanup(&cleanup_repository, "repo");
+
+	create_tmp_global_config("tmp_global_path", "init.defaultbranch", "my_default_branch");
+
+	cl_git_pass(git_repository_init(&_repo, "repo", 0));
+	cl_git_pass(git_reference_lookup(&head, _repo, "HEAD"));
+
+	cl_assert_equal_s("refs/heads/my_default_branch", git_reference_symbolic_target(head));
+
+	git_reference_free(head);
+}
diff --git a/tests/repo/open.c b/tests/repo/open.c
index 448ccdc87..881a23d34 100644
--- a/tests/repo/open.c
+++ b/tests/repo/open.c
@@ -35,7 +35,53 @@ void test_repo_open__format_version_1(void)
 
 	git_config_free(config);
 	git_repository_free(repo);
+
+	cl_git_pass(git_repository_open(&repo, "empty_bare.git"));
+	cl_assert(git_repository_path(repo) != NULL);
+	cl_assert(git__suffixcmp(git_repository_path(repo), "/") == 0);
+	git_repository_free(repo);
+}
+
+void test_repo_open__format_version_1_with_valid_extension(void)
+{
+	git_repository *repo;
+	git_config *config;
+
+	repo = cl_git_sandbox_init("empty_bare.git");
+
+	cl_git_pass(git_repository_open(&repo, "empty_bare.git"));
+	cl_git_pass(git_repository_config(&config, repo));
+
+	cl_git_pass(git_config_set_int32(config, "core.repositoryformatversion", 1));
+	cl_git_pass(git_config_set_int32(config, "extensions.noop", 1));
+
+	git_config_free(config);
+	git_repository_free(repo);
+
+	cl_git_pass(git_repository_open(&repo, "empty_bare.git"));
+	cl_assert(git_repository_path(repo) != NULL);
+	cl_assert(git__suffixcmp(git_repository_path(repo), "/") == 0);
+	git_repository_free(repo);
+}
+
+void test_repo_open__format_version_1_with_invalid_extension(void)
+{
+	git_repository *repo;
+	git_config *config;
+
+	repo = cl_git_sandbox_init("empty_bare.git");
+
+	cl_git_pass(git_repository_open(&repo, "empty_bare.git"));
+	cl_git_pass(git_repository_config(&config, repo));
+
+	cl_git_pass(git_config_set_int32(config, "core.repositoryformatversion", 1));
+	cl_git_pass(git_config_set_int32(config, "extensions.invalid", 1));
+
+	git_config_free(config);
+	git_repository_free(repo);
+
 	cl_git_fail(git_repository_open(&repo, "empty_bare.git"));
+	git_repository_free(repo);
 }
 
 void test_repo_open__standard_empty_repo_through_gitdir(void)
diff --git a/tests/resources/blametest.git/objects/1d/81379086fd6d91ee027e883cf6f4703a107dfb b/tests/resources/blametest.git/objects/1d/81379086fd6d91ee027e883cf6f4703a107dfb
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diff --git a/tests/resources/blametest.git/refs/heads/master b/tests/resources/blametest.git/refs/heads/master
index 994877a20..9d1715881 100644
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diff --git a/tests/resources/config/config12 b/tests/resources/config/config12
index 6917880b5..2e92762df 100644
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diff --git a/tests/resources/testrepo.git/objects/pack/multi-pack-index b/tests/resources/testrepo.git/objects/pack/multi-pack-index
new file mode 100644
index 000000000..95102aeb4
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diff --git a/tests/status/status_helpers.h b/tests/status/status_helpers.h
index 242076cc9..464266af3 100644
--- a/tests/status/status_helpers.h
+++ b/tests/status/status_helpers.h
@@ -9,6 +9,7 @@ typedef struct {
 	const char** expected_paths;
 	int expected_entry_count;
 	const char *file;
+	const char *func;
 	int line;
 	bool debug;
 } status_entry_counts;
@@ -18,6 +19,7 @@ typedef struct {
 	(counts).expected_statuses = (statuses); \
 	(counts).expected_paths = (paths); \
 	(counts).file = __FILE__; \
+	(counts).func = __func__; \
 	(counts).line = __LINE__; \
 	} while (0)
 
diff --git a/tests/status/submodules.c b/tests/status/submodules.c
index 12edce2b2..38a39471a 100644
--- a/tests/status/submodules.c
+++ b/tests/status/submodules.c
@@ -71,12 +71,12 @@ static int cb_status__match(const char *p, unsigned int s, void *payload)
 	int idx = counts->entry_count++;
 
 	clar__assert_equal(
-		counts->file, counts->line,
+		counts->file, counts->func, counts->line,
 		"Status path mismatch", 1,
 		"%s", counts->expected_paths[idx], p);
 
 	clar__assert_equal(
-		counts->file, counts->line,
+		counts->file, counts->func, counts->line,
 		"Status code mismatch", 1,
 		"%o", counts->expected_statuses[idx], s);
 
diff --git a/tests/status/worktree.c b/tests/status/worktree.c
index 7711b2da4..d2842485b 100644
--- a/tests/status/worktree.c
+++ b/tests/status/worktree.c
@@ -949,7 +949,7 @@ void test_status_worktree__sorting_by_case(void)
 
 void test_status_worktree__long_filenames(void)
 {
-	char path[260*4+1];
+	char path[260*4+1] = {0};
 	const char *expected_paths[] = {path};
 	const unsigned int expected_statuses[] = {GIT_STATUS_WT_NEW};
 
diff --git a/tests/stream/deprecated.c b/tests/stream/deprecated.c
index 2c2bbfdc3..fecd1be03 100644
--- a/tests/stream/deprecated.c
+++ b/tests/stream/deprecated.c
@@ -1,19 +1,18 @@
-#undef GIT_DEPRECATE_HARD
-
 #include "clar_libgit2.h"
 #include "git2/sys/stream.h"
 #include "streams/tls.h"
 #include "streams/socket.h"
 #include "stream.h"
 
-static git_stream test_stream;
-static int ctor_called;
-
 void test_stream_deprecated__cleanup(void)
 {
 	cl_git_pass(git_stream_register(GIT_STREAM_TLS | GIT_STREAM_STANDARD, NULL));
 }
 
+#ifndef GIT_DEPRECATE_HARD
+static git_stream test_stream;
+static int ctor_called;
+
 static int test_stream_init(git_stream **out, const char *host, const char *port)
 {
 	GIT_UNUSED(host);
@@ -24,9 +23,11 @@ static int test_stream_init(git_stream **out, const char *host, const char *port
 
 	return 0;
 }
+#endif
 
 void test_stream_deprecated__register_tls(void)
 {
+#ifndef GIT_DEPRECATE_HARD
 	git_stream *stream;
 	int error;
 
@@ -55,4 +56,5 @@ void test_stream_deprecated__register_tls(void)
 	cl_assert(&test_stream != stream);
 
 	git_stream_free(stream);
+#endif
 }
diff --git a/tests/submodule/add.c b/tests/submodule/add.c
index f4d1e3b79..fc458f826 100644
--- a/tests/submodule/add.c
+++ b/tests/submodule/add.c
@@ -90,7 +90,7 @@ void test_submodule_add__url_relative(void)
 	/* make sure we don't default to origin - rename origin -> test_remote */
 	cl_git_pass(git_remote_rename(&problems, g_repo, "origin", "test_remote"));
 	cl_assert_equal_i(0, problems.count);
-	git_strarray_free(&problems);
+	git_strarray_dispose(&problems);
 	cl_git_fail(git_remote_lookup(&remote, g_repo, "origin"));
 
 	cl_git_pass(
diff --git a/tests/submodule/submodule_helpers.c b/tests/submodule/submodule_helpers.c
index 4bb064899..1d4759616 100644
--- a/tests/submodule/submodule_helpers.c
+++ b/tests/submodule/submodule_helpers.c
@@ -199,22 +199,22 @@ git_repository *setup_fixture_submodule_with_path(void)
 
 void assert__submodule_exists(
 	git_repository *repo, const char *name,
-	const char *msg, const char *file, int line)
+	const char *msg, const char *file, const char *func, int line)
 {
 	git_submodule *sm;
 	int error = git_submodule_lookup(&sm, repo, name);
 	if (error)
-		cl_git_report_failure(error, 0, file, line, msg);
-	cl_assert_at_line(sm != NULL, file, line);
+		cl_git_report_failure(error, 0, file, func, line, msg);
+	cl_assert_at_line(sm != NULL, file, func, line);
 	git_submodule_free(sm);
 }
 
 void refute__submodule_exists(
 	git_repository *repo, const char *name, int expected_error,
-	const char *msg, const char *file, int line)
+	const char *msg, const char *file, const char *func, int line)
 {
 	clar__assert_equal(
-		file, line, msg, 1, "%i",
+		file, func, line, msg, 1, "%i",
 		expected_error, (int)(git_submodule_lookup(NULL, repo, name)));
 }
 
diff --git a/tests/submodule/submodule_helpers.h b/tests/submodule/submodule_helpers.h
index d112b0c77..3c3f062ae 100644
--- a/tests/submodule/submodule_helpers.h
+++ b/tests/submodule/submodule_helpers.h
@@ -10,16 +10,16 @@ extern git_repository *setup_fixture_submodule_with_path(void);
 
 extern unsigned int get_submodule_status(git_repository *, const char *);
 
-extern void assert__submodule_exists(
-	git_repository *, const char *, const char *, const char *, int);
+extern void assert__submodule_exists(git_repository *, const char *,
+	const char *, const char *, const char *, int);
 
 #define assert_submodule_exists(repo,name)								\
-	assert__submodule_exists(repo, name, "git_submodule_lookup(" #name ") failed", __FILE__, __LINE__)
+	assert__submodule_exists(repo, name, "git_submodule_lookup(" #name ") failed", __FILE__, __func__, __LINE__)
 
-extern void refute__submodule_exists(
-	git_repository *, const char *, int err, const char *, const char *, int);
+extern void refute__submodule_exists(git_repository *, const char *,
+	int err, const char *, const char *, const char *, int);
 
 #define refute_submodule_exists(repo,name,code) \
-	refute__submodule_exists(repo, name, code, "expected git_submodule_lookup(" #name ") to fail with error " #code, __FILE__, __LINE__)
+	refute__submodule_exists(repo, name, code, "expected git_submodule_lookup(" #name ") to fail with error " #code, __FILE__, __func__, __LINE__)
 
 extern void dump_submodules(git_repository *repo);
diff --git a/tests/worktree/bare.c b/tests/worktree/bare.c
index 2a0e88239..7234dfffd 100644
--- a/tests/worktree/bare.c
+++ b/tests/worktree/bare.c
@@ -28,7 +28,7 @@ void test_worktree_bare__list(void)
 	cl_git_pass(git_worktree_list(&wts, g_repo));
 	cl_assert_equal_i(wts.count, 0);
 
-	git_strarray_free(&wts);
+	git_strarray_dispose(&wts);
 }
 
 void test_worktree_bare__add(void)
@@ -48,7 +48,7 @@ void test_worktree_bare__add(void)
 	cl_assert_equal_i(0, git_repository_is_bare(wtrepo));
 	cl_assert_equal_i(1, git_repository_is_worktree(wtrepo));
 
-	git_strarray_free(&wts);
+	git_strarray_dispose(&wts);
 	git_worktree_free(wt);
 	git_repository_free(wtrepo);
 }
diff --git a/tests/worktree/refs.c b/tests/worktree/refs.c
index e62149d2e..27dc667ea 100644
--- a/tests/worktree/refs.c
+++ b/tests/worktree/refs.c
@@ -56,8 +56,8 @@ void test_worktree_refs__list(void)
 	}
 
 exit:
-	git_strarray_free(&refs);
-	git_strarray_free(&wtrefs);
+	git_strarray_dispose(&refs);
+	git_strarray_dispose(&wtrefs);
 	cl_git_pass(error);
 }
 
@@ -163,7 +163,10 @@ void test_worktree_refs__renaming_reference_updates_worktree_heads(void)
 	cl_git_pass(git_branch_lookup(&branch, fixture.repo,
 		    "testrepo-worktree", GIT_BRANCH_LOCAL));
 	cl_git_pass(git_reference_rename(&renamed, branch, "refs/heads/renamed", 0, NULL));
-	cl_git_pass(git_repository_head(&head, fixture.worktree));
+
+	cl_git_pass(git_reference_lookup(&head, fixture.worktree, GIT_HEAD_FILE));
+	cl_assert_equal_i(git_reference_type(head), GIT_REFERENCE_SYMBOLIC);
+	cl_assert_equal_s(git_reference_symbolic_target(head), "refs/heads/renamed");
 
 	git_reference_free(head);
 	git_reference_free(branch);
diff --git a/tests/worktree/repository.c b/tests/worktree/repository.c
index ca56413b7..c4eeadd35 100644
--- a/tests/worktree/repository.c
+++ b/tests/worktree/repository.c
@@ -50,9 +50,12 @@ void test_worktree_repository__head_detached(void)
 
 	cl_assert(git_repository_head_detached(fixture.worktree));
 	cl_assert(git_repository_head_detached_for_worktree(fixture.repo, "testrepo-worktree"));
-	cl_git_fail(git_repository_head_for_worktree(&head, fixture.repo, "testrepo-worktree"));
+	cl_git_pass(git_repository_head_for_worktree(&head, fixture.repo, "testrepo-worktree"));
+
+	cl_assert_equal_oid(&ref->target.oid, &head->target.oid);
 
 	git_reference_free(ref);
+	git_reference_free(head);
 }
 
 void test_worktree_repository__head_detached_fails_for_invalid_worktree(void)
diff --git a/tests/worktree/worktree.c b/tests/worktree/worktree.c
index 5e99dbf61..cd20bed82 100644
--- a/tests/worktree/worktree.c
+++ b/tests/worktree/worktree.c
@@ -30,7 +30,7 @@ void test_worktree_worktree__list(void)
 	cl_assert_equal_i(wts.count, 1);
 	cl_assert_equal_s(wts.strings[0], "testrepo-worktree");
 
-	git_strarray_free(&wts);
+	git_strarray_dispose(&wts);
 }
 
 void test_worktree_worktree__list_with_invalid_worktree_dirs(void)
@@ -61,7 +61,7 @@ void test_worktree_worktree__list_with_invalid_worktree_dirs(void)
 		cl_git_pass(git_worktree_list(&wts, fixture.worktree));
 		cl_assert_equal_i(wts.count, 1);
 		cl_assert_equal_s(wts.strings[0], "testrepo-worktree");
-		git_strarray_free(&wts);
+		git_strarray_dispose(&wts);
 
 		for (j = 0; j < ARRAY_SIZE(filesets[i]); j++) {
 			git_buf_truncate(&path, len);
@@ -81,7 +81,7 @@ void test_worktree_worktree__list_in_worktree_repo(void)
 	cl_assert_equal_i(wts.count, 1);
 	cl_assert_equal_s(wts.strings[0], "testrepo-worktree");
 
-	git_strarray_free(&wts);
+	git_strarray_dispose(&wts);
 }
 
 void test_worktree_worktree__list_without_worktrees(void)
@@ -380,7 +380,7 @@ void test_worktree_worktree__name(void)
 
 	cl_git_pass(git_worktree_lookup(&wt, fixture.repo, "testrepo-worktree"));
 	cl_assert_equal_s(git_worktree_name(wt), "testrepo-worktree");
-	
+
 	git_worktree_free(wt);
 }
 
@@ -581,45 +581,32 @@ void test_worktree_worktree__prune_worktree(void)
 	git_worktree_free(wt);
 }
 
-static int read_head_ref(git_repository *repo, const char *path, void *payload)
+static int foreach_worktree_cb(git_repository *worktree, void *payload)
 {
-	git_vector *refs = (git_vector *) payload;
-	git_reference *head;
+	int *counter = (int *)payload;
 
-	GIT_UNUSED(repo);
+	switch (*counter) {
+	case 0:
+		cl_assert_equal_s(git_repository_path(fixture.repo),
+				  git_repository_path(worktree));
+		cl_assert(!git_repository_is_worktree(worktree));
+		break;
+	case 1:
+		cl_assert_equal_s(git_repository_path(fixture.worktree),
+				  git_repository_path(worktree));
+		cl_assert(git_repository_is_worktree(worktree));
+		break;
+	default:
+		cl_fail("more worktrees found than expected");
+	}
 
-	cl_git_pass(git_reference__read_head(&head, repo, path));
-
-	git_vector_insert(refs, head);
+	(*counter)++;
 
 	return 0;
 }
 
-void test_worktree_worktree__foreach_head_gives_same_results_in_wt_and_repo(void)
+void test_worktree_worktree__foreach_worktree_lists_all_worktrees(void)
 {
-	git_vector repo_refs = GIT_VECTOR_INIT, worktree_refs = GIT_VECTOR_INIT;
-	git_reference *heads[2];
-	size_t i;
-
-	cl_git_pass(git_reference_lookup(&heads[0], fixture.repo, GIT_HEAD_FILE));
-	cl_git_pass(git_reference_lookup(&heads[1], fixture.worktree, GIT_HEAD_FILE));
-
-	cl_git_pass(git_repository_foreach_head(fixture.repo, read_head_ref, 0, &repo_refs));
-	cl_git_pass(git_repository_foreach_head(fixture.worktree, read_head_ref, 0, &worktree_refs));
-
-	cl_assert_equal_i(repo_refs.length, ARRAY_SIZE(heads));
-	cl_assert_equal_i(worktree_refs.length, ARRAY_SIZE(heads));
-
-	for (i = 0; i < ARRAY_SIZE(heads); i++) {
-		cl_assert_equal_s(heads[i]->name, ((git_reference *) repo_refs.contents[i])->name);
-		cl_assert_equal_s(heads[i]->name, ((git_reference *) repo_refs.contents[i])->name);
-		cl_assert_equal_s(heads[i]->name, ((git_reference *) worktree_refs.contents[i])->name);
-
-		git_reference_free(heads[i]);
-		git_reference_free(repo_refs.contents[i]);
-		git_reference_free(worktree_refs.contents[i]);
-	}
-
-	git_vector_free(&repo_refs);
-	git_vector_free(&worktree_refs);
+	int counter = 0;
+	cl_git_pass(git_repository_foreach_worktree(fixture.repo, foreach_worktree_cb, &counter));
 }