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Update README.md 

Add info on libgit2sharp, new build system, and usage guide.

Signed-off-by: Vicent Marti <tanoku@gmail.com>
parent 2619dee4
Showing with 40 additions and 153 deletions
README.md
......@@ -5,22 +5,9 @@ libgit2 is a portable, pure C implementation of the Git core methods provided as
re-entrant linkable library with a solid API, allowing you to write native
speed custom Git applications in any language with bindings.
Why Do We Need It
=======================
In the current Git project, though a libgit.a file is produced it is
not re-entrant (it will call <code>die()</code> on basically any error)
and it has no stable or well-designed public API. As there is no good
way to link to this effectively, a new library was needed that fulfilled
these requirements. Thus libgit2.
Though it would be nice to use the same library that Git itself uses,
Git actually has a pretty simple storage format and just having native
access to that is pretty useful. Eventually we would like to have most
of the functionality of the core Git tools or even get the library
integrated into Git itself, but in the meantime having a cleanly designed
and maintained linkable Git library with a public API will likely be helpful
to lots of people.
* Website: <http://libgit2.github.com>
* API documentation: <http://libgit2.github.com/libgit2/modules.html>
* Usage guide: <http://libgit2.github.com/api.html>
What It Can Do
==================================
......@@ -35,144 +22,43 @@ libgit2 is already very usable.
* tree traversal
* basic index file (staging area) operations
Building libgit2 - Using CMake
==============================
When building using CMake the following dependencies are required:
Building libgit2 - External dependencies
========================================
* CMake 2.6+ <http://www.cmake.org>
Required dependency:
The following libraries are required to manually build the libgit2 library:
* zlib 1.2+ <http://www.zlib.net/>
Optional dependency:
* LibSSL <http://www.openssl.org/>
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>.
Building libgit2 - Unix systems
==================================
In Unix-like systems, like Linux, xBSD and Mac OS X, libgit2 has
the following dependencies:
* Python 2.5-3.1 <http://www.python.org>
Used to run the build system; no extra libraries required.
Should probably ship installed with your OS.
* zlib 1.2+ <http://www.zlib.net/>
* LibSSL <http://www.openssl.org/>
Only needed if you want to re-use OpenSSL's SHA1 routines; libgit2 compiles its own routines by default.
To build it, first configure the build system by running:
$ ./waf configure
Then build the library, either in its shared (libgit2.so) or static form (libgit2.a)
$ ./waf build-static
$ ./waf build-shared
You can then test the library with:
$ ./waf test
And finally you can install it with (you may need to sudo):
$ ./waf install
Building libgit2 - Windows MSVC++
==================================
When building under Windows using the MSVC compiler, libgit2 has
the following dependencies:
* Python 2.5-3.1 <http://www.python.org>
Used to run the build system; no extra libraries required.
* zlib 1.2+ (Windows API Version) <http://www.zlib.net/>
Make sure you compile the ZLib library using the MSVC solution that ships in its source distribution.
When building in Windows using MSVC, make sure you compile ZLib using the MSVC solution that ships in its source distribution.
Alternatively, you may download precompiled binaries from: <http://www.winimage.com/zLibDll/>
* LibSSL <http://www.openssl.org/>
Only needed if you want to re-use OpenSSL's SHA1 routines; libgit2 compiles its own routines by default.
To build it, first configure the build system by running:
$ ./waf configure
Then build the library, either in its shared (libgit2.dll) or static form (libgit2.lib)
$ ./waf build-static
$ ./waf build-shared
You can then test the library with:
$ ./waf test
Lastly, you can manually install the generated *.lib and *.dll files, depending on your preferences.
Building libgit2 - Windows MinGW
==================================
When building under Windows using the GCC compiler that ships with MinGW, libgit2 has the following dependencies:
* Python 2.5-3.1 <http://www.python.org>
Used to run the build system; no extra libraries required.
* zlib 1.2+ <http://www.zlib.net/>
* LibSSL **(optional)** <http://www.openssl.org/>
* pthreads-w32 <http://sourceware.org/pthreads-win32/>
libgit2 can be built using the SHA1 implementation of LibSSL-Crypto, instead of the built-in custom implementations. Performance wise, they are quite similar.
Or an equivalent pthreads implementation for non-POSIX systems
* pthreads-w32 **(required on MinGW)** <http://sourceware.org/pthreads-win32/>
* LibSSL <http://www.openssl.org/>
Building libgit2 - Using waf
======================
Only needed if you want to re-use OpenSSL's SHA1 routines; libgit2 compiles its own routines by default.
Waf is a minimalist build system which only requires a Python 2.5+ interpreter to run. This is the default build system for libgit2.
To build it, first configure the build system and force GCC as the compiler,
instead of the default MSVC:
To build libgit2 using waf, first configure the build system by running:
$ ./waf configure --check-c-compiler=gcc
$ ./waf configure
Then build the library, either in its shared (libgit2.so) or static form (libgit2.a)
Then build the library, either in its shared (libgit2.so) or static form (libgit2.a):
$ ./waf build-static
$ ./waf build-shared
You can then test the library with:
You can then run the full test suite with:
$ ./waf test
And finally you can install it with:
$ ./waf install
And finally you can install the library with (you may need to sudo):
Configuration settings
==================================
$ sudo ./waf install
The waf build system for libgit2 accepts the following flags:
......@@ -195,36 +81,37 @@ The waf build system for libgit2 accepts the following flags:
You can run `./waf --help` to see a full list of install options and
targets.
Language Bindings
==================================
So you want to use Git from your favorite programming language. Here are
the bindings to libgit2 that are currently available:
Building libgit2 - Using CMake
==============================
Ruby
--------------------
The libgit2 library can also be built using CMake 2.6+ (<http://www.cmake.org>) on all platforms.
Rugged is the reference library used to make sure the
libgit2 API is sane. This should be mostly up to date.
On most systems you can build the library using the following commands
<https://github.com/libgit2/rugged>
$ 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:
Python
--------------------
$ cmake .. -DCMAKE_INSTALL_PREFIX=/install/prefix
$ cmake --build . --target install
Pygit2 is a Python binding to libgit2.
For more advanced use or questions about CMake please read <http://www.cmake.org/Wiki/CMake_FAQ>.
<https://github.com/libgit2/pygit2>
Erlang
--------------------
Language Bindings
==================================
Geef is an example of an Erlang NIF binding to libgit2. A bit out of
date, but basically works. Best as a proof of concept of what you could
do with Erlang and NIFs with libgit2.
Here are the bindings to libgit2 that are currently available:
<https://github.com/schacon/geef>
* Rugged (Ruby bindings) <https://github.com/libgit2/rugged>
* pygit2 (Python bindings) <https://github.com/libgit2/pygit2>
* libgit2sharp (.NET bindings) <https://github.com/nulltoken/libgit2sharp>
* Geef (Erlang bindings) <https://github.com/schacon/geef>
If you start another language binding to libgit2, please let us know so
we can add it to the list.
......@@ -243,7 +130,7 @@ libgit2@librelist.com
License
==================================
libgit2 is under GPL2 with linking exemption, which basically means you
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.
......
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