Welcome to yet another libgit2 release, this one being the
biggest we've shipped so far. Highlights on this release
include diff, branches, notes and submodules support. The new
diff API is shiny and powerful. Check it out.
Apologies, one more time, to all the early adopters for the
breaking API changes. We've been iterating on the error
handling for the library until we reached its current state,
which we believe it's significantly more usable both for normal
users and for developers of bindings to other languages.
Also, we've renamed a few legacy calls to ensure that the whole
external API uses a consistent naming scheme.
As always, check the API docs for the full list of new API calls
and backwards-incompatible changes.
http://libgit2.github.com/libgit2/
Changelog of new features follows:
Attributes:
- Added function macros to check attribute values instead of having
to manually compare them
- Added support for choosing the attribute loading order (workdir files
vs index) and to skip the systems' default `.gitattributes`
- Fixed issues when fetching attribute data on bare repositories
Blob:
- Added support for creating blobs from any file on disk (not
restricted to the repository's working directory)
- Aded support for smudge filters when writing blobs to the ODB
- So far only CRLF normalization is available
Branches:
- Added a high-level branch API:
- git_branch_create
- git_branch_delete
- git_branch_list
- git_branch_move
Commit:
- Commit messages are now filtered to match Git rules (stripping
comments and adding proper whitespacing rules)
Config:
- Added support for setting and getting multivars
- Added `git_config_get_mapped` to map the value of a config
variable based on its defaults
Diff:
- Added full diff API:
- tree to tree
- index to tree
- workdir to index
- workdir to tree
- blob to blob
- Added helper functions to print the diffs as valid patchfiles
Error handling:
- New design for the error handling API, taking into consideration
the requirements of dynamic languages
Indexer:
- Added streaming packfile indexer
Merge:
- Added support for finding the merge base between two commits
Notes:
- Full git-notes support:
- git_note_read
- git_note_message/git_note_oid
- git_note_create
- git_note_remove
- git_note_free
- git_note_foreach
References:
- Added `git_reference_name_to_oid` helper to resolve
a reference to its final OID
- Added `git_reference_cmp` to compare two references with
a stable order
Remotes:
- Added support for writing and saving remotes
- `git_remote_add`
- `git_remote_save`
- Setters for all the attributes of a remote
- Switched remote download to the new streaming packfile indexer
- Fixed fetch on HTTP and Git under Windows
- Added `git_remote_supported_url` helper to check if a protocol
can be accessed by the library
- Added `git_remote_list`
Repository:
- Made `git_repository_open` smarter when finding the `.git` folder.
- Added `git_repository_open_ext` with extra options when
opening a repository
Revwalk:
- Added support for pushing/hiding several references through a glob
- Added helper to push/hide the current HEAD to the walker
- Added helper to push/hide a single reference to the walker
Status:
- Greatly improved Status implementation using the new `diff` code
as a backend
Submodules:
- Added a partial submodules API to get information about a
submodule and list all the submodules in a repository
- git_submodule_foreach
- git_submodule_lookup
Tag:
- Added `git_tag_peel` helper to peel a tag to its pointed object
- Tag messages are now filtered to match Git rules (stripping comments
and adding proper whitespacing rules)
Tree:
- Killed the old `git_tree_diff` API, which is replaced by the
new diff code.
Signed-off-by: Vicent Marti <tanoku@gmail.com>
The goal of this work is to rewrite git_status_file to use the
same underlying code as git_status_foreach.
This is done in 3 phases:
1. Extend iterators to allow ranged iteration with start and
end prefixes for the range of file names to be covered.
2. Improve diff so that when there is a pathspec and there is
a common non-wildcard prefix of the pathspec, it will use
ranged iterators to minimize excess iteration.
3. Rewrite git_status_file to call git_status_foreach_ext
with a pathspec that covers just the one file being checked.
Since ranged iterators underlie the status & diff implementation,
this is actually fairly efficient. The workdir iterator does
end up loading the contents of all the directories down to the
single file, which should ideally be avoided, but it is pretty
good.
Building a "shared object" (DLL) in Windows includes 2 steps:
- specify __declspec(dllexport)
when building the library itself. MSVC will disallow itself from
optimizing these symbols out and reference them in the PE's
Exports-Table.
Further, a static link library will be generated. This library
contains the symbols which are exported via the declsepc above.
The __declspec(dllexport) becomes part of the symbol-signature
(like parameter types in C++ are 'mangled' into the symbol name,
the export specifier is mingled with the name)
- specify __declspec(dllimport)
when using the library. This again mingles the declspec into the
name and declares the function / variable with external linkage.
cmake automatically adds -Dgit2_EXPORTS to the compiler arguments
when compiling the libgit2 project.
The 'git2' is the name specified via PROJECT() in CMakeLists.txt.
This makes the git attributes and git ignores cache check
stat information before using the file contents from the
cache. For cached files from the index, it checks the SHA
of the file instead. This should reduce the need to ever
call `git_attr_cache_flush()` in most situations.
This commit also fixes the `git_status_should_ignore` API
to use the libgit2 standard parameter ordering.
'git commit' and 'git tag -a' enforce some conventions, like cleaning up excess whitespace and making sure that the last line ends with a '\n'. This fix replicates this behavior.
Fixlibgit2/libgit2sharp#117
Depending on the operation, we need to consider gitattributes
in both the work dir and the index. This adds a parameter to
all of the gitattributes related functions that allows user
control of attribute reading behavior (i.e. prefer workdir,
prefer index, only use index).
This fix also covers allowing us to check attributes (and
hence do diff and status) on bare repositories.
This was a somewhat larger change that I hoped because it had
to change the cache key used for gitattributes files.
This allows the caller to update an internal structure or update the
user output with the tips that were updated.
While in the area, only try to update the ref if the value is
different from its old one.
Trying to send every single line immediately won't give us any speed
improvement and duplicates the code we need for other transports. Make
the git transport use the same buffer functions as HTTP.
This changes the git_remote_download() API, but the existing one is
silly, so you don't get to complain.
The new API allows to know how much data has been downloaded, how many
objects we expect in total and how many we've processed.
