c6ac28fdc5
Often `git_odb_read_header` will "fail" and have to read the entire object into memory instead of just the header. When this happens, the object is loaded and then disposed of immediately, which makes it difficult to efficiently use the header information to decide if the object should be loaded (since attempting to do so will often result in loading the object twice). This commit takes the existing code and reorganizes it to have two new functions: - `git_odb__read_header_or_object` which acts just like the old read header function except that it returns the object, too, if it was forced to load the whole thing. It then becomes the callers responsibility to free the `git_odb_object`. - `git_object__from_odb_object` which was extracted from the old `git_object_lookup` and creates a subclass of `git_object` from an existing `git_odb_object` (separating the ODB lookup from the `git_object` creation). This allows you to use the first header reading function efficiently without instantiating the `git_odb_object` twice. There is no net change to the behavior of any of the existing functions, but this allows internal code to tap into the ODB lookup and object creation to be more efficient. |
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| deps | ||
| docs | ||
| examples | ||
| include | ||
| packaging/rpm | ||
| src | ||
| tests-clar | ||
| .gitattributes | ||
| .gitignore | ||
| .HEADER | ||
| .travis.yml | ||
| api.docurium | ||
| AUTHORS | ||
| CMakeLists.txt | ||
| CONVENTIONS | ||
| COPYING | ||
| git.git-authors | ||
| libgit2_clar.supp | ||
| libgit2.pc.in | ||
| Makefile.embed | ||
| README.md | ||
libgit2 - the Git linkable library
libgit2 is a portable, pure C implementation of the Git core methods provided as a re-entrant linkable library with a solid API, allowing you to write native speed custom Git applications in any language with bindings.
libgit2 is licensed under a very permissive license (GPLv2 with a special Linking Exception). This basically means that you can link it (unmodified) with any kind of software without having to release its source code.
- Mailing list: libgit2@librelist.org
- Archives: http://librelist.com/browser/libgit2/
- Website: http://libgit2.github.com
- API documentation: http://libgit2.github.com/libgit2
- Usage guide: http://libgit2.github.com/api.html
What It Can Do
libgit2 is already very usable.
- SHA conversions, formatting and shortening
- abstracted ODB backend system
- commit, tag, tree and blob parsing, editing, and write-back
- tree traversal
- revision walking
- index file (staging area) manipulation
- reference management (including packed references)
- config file management
- high level repository management
- thread safety and reentrancy
- descriptive and detailed error messages
- ...and more (over 175 different API calls)
Building libgit2 - Using CMake
libgit2 builds cleanly on most platforms without any external dependencies.
Under Unix-like systems, like Linux, *BSD and Mac OS X, libgit2 expects pthreads to be available;
they should be installed by default on all systems. Under Windows, libgit2 uses the native Windows API
for threading.
The libgit2 library is built using CMake 2.6+ (http://www.cmake.org) on all platforms.
On most systems you can build the library using the following commands
$ mkdir build && cd build
$ cmake ..
$ cmake --build .
Alternatively you can point the CMake GUI tool to the CMakeLists.txt file and generate platform specific build project or IDE workspace.
To install the library you can specify the install prefix by setting:
$ cmake .. -DCMAKE_INSTALL_PREFIX=/install/prefix
$ cmake --build . --target install
If you want to build a universal binary for Mac OS X, CMake sets it
all up for you if you use -DCMAKE_OSX_ARCHITECTURES="i386;x86_64"
when configuring.
For more advanced use or questions about CMake please read http://www.cmake.org/Wiki/CMake_FAQ.
The following CMake variables are declared:
INSTALL_BIN: Where to install binaries to.LIB_INSTALL_DIR: Where to install libraries to.INSTALL_INC: Where to install headers to.BUILD_SHARED_LIBS: Build libgit2 as a Shared Library (defaults to ON)BUILD_CLAR: Build Clar-based test suite (defaults to ON)THREADSAFE: Build libgit2 with threading support (defaults to OFF)
Language Bindings
Here are the bindings to libgit2 that are currently available:
- C++
- libqgit2, Qt bindings https://projects.kde.org/projects/playground/libs/libqgit2/
- Chicken Scheme
- chicken-git https://wiki.call-cc.org/egg/git
- Delphi
- GitForDelphi https://github.com/libgit2/GitForDelphi
- Erlang
- Go
- GObject
- libgit2-glib https://live.gnome.org/Libgit2-glib
- Haskell
- Lua
- .NET
- libgit2net, low level bindings https://github.com/txdv/libgit2net
- libgit2sharp https://github.com/libgit2/libgit2sharp
- Node.js
- node-gitteh https://github.com/libgit2/node-gitteh
- nodegit https://github.com/tbranyen/nodegit
- Objective-C
- objective-git https://github.com/libgit2/objective-git
- OCaml
- libgit2-ocaml https://github.com/burdges/libgit2-ocaml
- Parrot Virtual Machine
- parrot-libgit2 https://github.com/letolabs/parrot-libgit2
- Perl
- git-xs-pm https://github.com/ingydotnet/git-xs-pm
- PHP
- Python
- Ruby
- Vala
If you start another language binding to libgit2, please let us know so we can add it to the list.
How Can I Contribute?
Fork libgit2/libgit2 on GitHub, add your improvement, push it to a branch in your fork named for the topic, send a pull request. If you change the API or make other large changes, make a note of it in docs/rel-notes/ in a file named after the next release.
You can also file bugs or feature requests under the libgit2 project on GitHub, or join us on the mailing list by sending an email to:
License
libgit2 is under GPL2 with linking exemption. This means you can link to the library with any program, commercial, open source or other. However, you cannot modify libgit2 and distribute it without supplying the source.
See the COPYING file for the full license text.