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~~ The libgit2 mailing list has traditionally been hosted in Librelist, but Librelist is and has always been a shitshow. We encourage you to open an issue on GitHub instead for any questions regarding the library.
- Archives: http://librelist.com/browser/libgit2/
Website: http://libgit2.github.com
API documentation: http://libgit2.github.com/libgit2
IRC: #libgit2 on irc.freenode.net.

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

For more advanced use or questions about CMake please read http://www.cmake.org/Wiki/CMake_FAQ.

The following CMake variables are declared:

BIN_INSTALL_DIR: Where to install binaries to.
LIB_INSTALL_DIR: Where to install libraries to.
INCLUDE_INSTALL_DIR: 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)
STDCALL: Build libgit2 as stdcall. Turn off for cdecl (Windows; defaults to ON)

Compiler and linker options

CMake lets you specify a few variables to control the behavior of the compiler and linker. These flags are rarely used but can be useful for 64-bit to 32-bit cross-compilation.

CMAKE_C_FLAGS: Set your own compiler flags
CMAKE_FIND_ROOT_PATH: Override the search path for libraries
ZLIB_LIBRARY, OPENSSL_SSL_LIBRARY AND OPENSSL_CRYPTO_LIBRARY: Tell CMake where to find those specific libraries

MacOS X

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.

Windows

You need to run the CMake commands from the Visual Studio command prompt, not the regular or Windows SDK one. Select the right generator for your version with the `-G "Visual Studio X" option.

See [the wiki] (https://github.com/libgit2/libgit2/wiki/Building-libgit2-on-Windows) for more detailed instructions.

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
D
- dlibgit https://github.com/AndrejMitrovic/dlibgit
Delphi
- GitForDelphi https://github.com/libgit2/GitForDelphi
Erlang
- Geef https://github.com/schacon/geef
Go
- go-git https://github.com/str1ngs/go-git
GObject
- libgit2-glib https://live.gnome.org/Libgit2-glib
Haskell
- hgit2 https://github.com/fpco/gitlib
Lua
- luagit2 https://github.com/libgit2/luagit2
.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-Raw https://github.com/ghedo/p5-Git-Raw
PHP
- php-git https://github.com/libgit2/php-git
Python
- pygit2 https://github.com/libgit2/pygit2
Ruby
- Rugged https://github.com/libgit2/rugged
Vala
- libgit2.vapi https://github.com/apmasell/vapis/blob/master/libgit2.vapi

If you start another language binding to libgit2, please let us know so we can add it to the list.

How Can I Contribute?

Check the contribution guidelines.

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.

License

bmorganpa/libgit2

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