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Merge pull request #2273 from jacquesg/ssh-interactive

Add support for SSH keyboard-interactive authentication
latest commit bfc50f83f8
Vicent Marti vmg authored April 19, 2014
Octocat-spinner-32 cmake We never search for libiconv via pkg-config January 30, 2014
Octocat-spinner-32 deps Clean up warnings December 09, 2013
Octocat-spinner-32 docs fix typos in docs December 01, 2013
Octocat-spinner-32 examples Add some funny options for debugging status April 01, 2014
Octocat-spinner-32 include Replace void * with proper callback types April 18, 2014
Octocat-spinner-32 script Only run clone-failure test on private repo February 05, 2014
Octocat-spinner-32 src Merge pull request #2273 from jacquesg/ssh-interactive April 19, 2014
Octocat-spinner-32 tests Merge pull request #2279 from libgit2/rb/moar-eegnöre-fîxés April 19, 2014
Octocat-spinner-32 .HEADER Switch the license from BSD to GPL+libgcc exception November 01, 2008
Octocat-spinner-32 .gitattributes Add git attributes settings for *.c and *.h to force line endings to LF. May 08, 2011
Octocat-spinner-32 .gitignore Undoing local change done for building on x64 March 24, 2014
Octocat-spinner-32 .mailmap Add missing mappings to .mailmap file November 15, 2013
Octocat-spinner-32 .travis.yml Tweak travis secure config January 13, 2014
Octocat-spinner-32 AUTHORS Update AUTHORS April 07, 2014
Octocat-spinner-32 CMakeLists.txt Fix broken logic for attr cache invalidation April 17, 2014
Octocat-spinner-32 Add project list and update readme February 26, 2014
Octocat-spinner-32 Clarify C compatibility policy February 20, 2014
Octocat-spinner-32 COPYING Replace pqueue with code from hashsig heap February 03, 2014
Octocat-spinner-32 Makefile.embed Fix warnings in Makefile.embed September 23, 2013
Octocat-spinner-32 Add a few projects to the list March 17, 2014
Octocat-spinner-32 Add project list and update readme February 26, 2014
Octocat-spinner-32 api.docurium update examples content to be compilable and up to date June 15, 2011
Octocat-spinner-32 git.git-authors Remove "ignore" state from the git.git-authors February 26, 2014
Octocat-spinner-32 Set the correct dependencies in the pkg-config file October 23, 2013
Octocat-spinner-32 libgit2_clar.supp Add a valgrind suppression for glibc's getaddrinfo cache March 25, 2013

libgit2 - the Git linkable library

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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. Additionally, the example code has been released to the public domain (see the separate license for more information).

What It Can Do

libgit2 is already very usable and is being used in production for many applications including the site, in Plastic SCM and also powering Microsoft's Visual Studio tools for Git. The library provides:

  • 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)

Optional dependencies

While the library provides git functionality without the need for dependencies, it can make use of a few libraries to add to it:

  • pthreads (non-Windows) to enable threadsafe access as well as multi-threaded pack generation
  • OpenSSL (non-Windows) to talk over HTTPS and provide the SHA-1 functions
  • LibSSH2 to enable the ssh transport
  • iconv (OSX) to handle the HFS+ path encoding peculiarities

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 (version 2.6 or newer) 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

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


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.


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 for more detailed instructions.


Extract toolchain from NDK using, script. Optionally, crosscompile and install OpenSSL inside of it. Then create CMake toolchain file that configures paths to your crosscompiler (substitute {PATH} with full path to the toolchain):


SET(CMAKE_C_COMPILER   {PATH}/bin/arm-linux-androideabi-gcc)
SET(CMAKE_CXX_COMPILER {PATH}/bin/arm-linux-androideabi-g++)


Add -DCMAKE_TOOLCHAIN_FILE={pathToToolchainFile} -DANDROID=1 to cmake command when configuring.

Language Bindings

Here are the bindings to libgit2 that are currently available:

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 to understand our workflow, the libgit2 coding conventions, and out list of good starting projects.


libgit2 is under GPL2 with linking exemption. This means you can link to and use the library from any program, proprietary or open source; paid or gratis. However, you cannot modify libgit2 and distribute it without supplying the source.

See the COPYING file for the full license text.

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