libgit2 v0.21.4 发布，这是 0.21 系列的最后一个版本，也是个维护版本，强烈建议升级！
bce9484 Fix assert when receiving uncommon sideband packet
4f2d272 ignore: don't leak rules into higher directories
8fce79b ignore: match git's rule negation rules
f888185 ignore: adjust test for negating inside a dir
b38fe6f Fix build of tests with mingw
4058f1c Fix ming32 compilation
04da236 Fix public header on sys/refs.h
dc39d23 Plug possible leak in the openssl locks
3a2c60e ssl: clear the OpenSSL locking function
9c04635 Fix segmentation fault observed on OpenBSD/sparc64
同时还发布了 libgit2 v0.22.0 正式版，此版本包括许多新特性和 bug 修复，主要更新内容如下：
git_signature_new()now requires a non-empty email address.
Use CommonCrypto libraries for SHA-1 calculation on Mac OS X.
Disable SSL compression and SSLv2 and SSLv3 ciphers in favor of TLSv1
The fetch behavior of remotes with autotag set to
has been changed to match git 1.9.0 and later. In this mode, libgit2 now
fetches all tags in addition to whatever else needs to be fetched.
git_checkout()now handles case-changing renames correctly on
case-insensitive filesystems; for example renaming "readme" to "README".
The search for libssh2 is now done via pkg-config instead of a
custom search of a few directories.
Add support for core.protectHFS and core.protectNTFS. Add more
validation for filenames which we write such as references.
The local transport now generates textual progress output like
git-upload-pack does ("counting objects").
git_checkout_index()can now check out an in-memory index that is not
necessarily the repository's index, so you may check out an index
that was produced by git_merge and friends while retaining the cached
Remove the default timeout for receiving / sending data over HTTP using
the WinHTTP transport layer.
Add SPNEGO (Kerberos) authentication using GSSAPI on Unix systems.
Provide built-in objects for the empty blob (e69de29) and empty
tree (4b825dc) objects.
The index' tree cache is now filled upon read-tree and write-tree
and the cache is written to disk.
LF -> CRLF filter refuses to handle mixed-EOL files
LF -> CRLF filter now runs when * text = auto (with Git for Windows 1.9.4)
File unlocks are atomic again via rename. Read-only files on Windows are
made read-write if necessary.
Share open packfiles across repositories to share descriptors and mmaps.
Use a map for the treebuilder, making insertion O(1)
The build system now accepts an option EMBED_SSH_PATH which when set
tells it to include a copy of libssh2 at the given location. This is
enabled for MSVC.
Add support for refspecs with the asterisk in the middle of a
Fetching now performs opportunistic updates. To achieve this, we
introduce a difference between active and passive refspecs, which
git_remote_fetch()to take a list of
resfpecs to be the active list, similarly to how git fetch accepts a
list on the command-line.
The THREADSAFE option to build libgit2 with threading support has
been flipped to be on by default.
The remote object has learnt to prune remote-tracking branches. If
the remote is configured to do so, this will happen via
git_remote_fetch(). You can also call
connecting or fetching to perform the prune.
consumers to perform binary detection on a git_buf.
git_branch_upstream_remote()has been introduced to provide the
branch..remote configuration value.
a description of the current commit (and working tree, respectively)
based on the nearest tag or reference
git_oidarraytype to expose all
merge bases between two commits.
git_merge_bases_many()to expose all merge bases between
Introduce rebase functionality (using the merge algorithm only).
git_rebase_init()to begin a new rebase session,
git_rebase_open()to open an in-progress rebase session,
git_rebase_commit()to commit the current rebase operation,
git_rebase_next()to apply the next rebase operation,
git_rebase_abort()to abort an in-progress rebase and
to complete a rebase operation.
git_note_committer()to get the author
and committer information on a
A factory function for ssh has been added which allows to change the
path of the programs to execute for receive-pack and upload-pack on
The ssh transport supports asking the remote host for accepted
credential types as well as multiple challeges using a single
connection. This requires to know which username you want to connect
as, so this introduces the USERNAME credential type which the ssh
transport will use to ask for the username.
GIT_EPEELerror code has been introduced when we cannot peel a tag
to the requested object type; if the given object otherwise cannot be
GIT_REPOSITORY_INIT_RELATIVE_GITLINKto use relative paths
when writing gitlinks, as is used by git core for submodules.
git_remote_prune()has been added. See above for description.
Introduce reference transactions, which allow multiple references to
be locked at the same time and updates be queued. This also allows
us to safely update a reflog with arbitrary contents, as we need to
do for stash.
removed as they have become essentially useless with rsync-style ssh paths.
git_clone_local_into()have been removed from the
public API in favour of
The option to ignore certificate errors via
is no longer present. Instead,
git_remote_callbackshas gained a new
entry which lets the user perform their own certificate checks.
Breaking API changes
git_submodule_update()function was renamed to
git_submodule_update()is now used to
provide functionalty similar to "git submodule update".
git_treebuilder_create()was renamed to
reflect it being a constructor rather than something which writes to
git_treebuilder_create()) now takes a
repository so that it can query repository configuration.
git_treebuilder_write()no longer takes a repository.
git_threads_shutdown()have been renamed to
git_libgit2_shutdown()to better explain what
their purpose is, as it's grown to be more than just about threads.
git_libgit2_shutdown()now return the number of
initializations of the library, so consumers may schedule work on the
git_transport_register()function no longer takes a priority and takes
a URL scheme name (eg "http") instead of a prefix like "http://"
return size_t instead of unsigned int.
uint16_t. This allows to set them to
in effect asking for "infinite" context e.g. to iterate over all the
unmodified lines of a diff.
git_status_file()now takes an exact path. Use
pathspec searching is needed.
git_note_create()has changed the position of the notes reference
name to match
git_remote_lookup()to bring it in line
with the rest of the lookup functions.
git_remote_rename()now takes the repository and the remote's
current name. Accepting a remote indicates we want to change it,
which we only did partially. It is much clearer if we accept a name
and no loaded objects are changed.
git_remote_delete()now accepts the repository and the remote's name
instead of a loaded remote.
git_annotated_commit, to better reflect its usage
for multiple functions (including rebase)
git_clone_optionsstruct no longer provides the
remote_namemembers for remote customization.
git_clone_optionsstruct has two new members,
remote_cb_payload, which allow the caller to completely override the remote
creation process. If needed, the caller can use this callback to give their
remote a name other than the default (origin) or disable cert checking.
remote_callbacksmember has been preserved for convenience, although it
is not used when a remote creation callback is supplied.
git_clone_options struct now provides
repository_cb_payloadto allow the user to create a repository with
git_pushstruct to perform a push has been replaced with
git_remote_upload(). The refspecs and options are passed as a
git_push_update_tips()is now also
git_remote_update_tips()and the callbacks are in the same struct as
git_remote_set_transport()function now sets a transport factory function,
rather than a pre-existing transport instance.
git_transportstructure definition has moved into the sys/transport.h
libgit2 no longer automatically sets the OpenSSL locking
functions. This is not something which we can know to do. A
last-resort convenience function is provided in sys/openssl.h,
git_openssl_set_locking()which can be used to set the locking.
libgit2 是一个可移植、纯C语言实现的 Git 核心开发包，你可以使用它来编写自定义的 Git 应用。
libgit2已被广泛应用在许多应用程序上，包括GitHub网站，还被应用在Plastic SCM和强大的微软Visual Studio工具箱。