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README.md

Node.js libgit2 bindings

Created by Tim Branyen @tbranyen

Currently under active development (and seeking contributors), nodegit provides asynchronous native bindings to the libgit2 C API.

Building and installing

Dependencies

To run nodegit you need Node.js and to run unit tests you will need to have git installed and accessible from your PATH to fetch any vendor/ addons.

Easy install (Recommended)

This will install and configure everything you need to use nodegit.

$ npm install nodegit

Mac OS X/Linux/Unix

Install nodegit by cloning source from GitHub and running the configure, make, and make install commands:

*Note: nodegit assumes your library path exists at ~/.node_libraries you can change this by specifying a new lib path*

$ git clone git://github.com/tbranyen/nodegit.git
$ cd nodegit

$ ./configure
$ make
$ make install

$ make install NODE_LIB_PATH=/path/to/your/libraries

*Updating to a new version*

$ make update

$ make update NODE_LIB_PATH=/path/to/your/libraries

Windows via Cygwin

nodegit has been compiled and tested to work with the setup required to build and run Node.js itself.

Instructions on compiling Node.js on a Windows platform can be found here: https://github.com/ry/node/wiki/Building-node.js-on-Cygwin-(Windows)

API Example Usage

Git Log Emulation

Convenience API

var git = require("nodegit");

// Read a repository
git.repo(".git", function(err, repo) {
  // Success is always 0, failure is always an error string
  if (err) { throw err; }

  // Use the master branch
  repo.branch("master", function(err, branch) {
    if (err) { throw err; }

    // Iterate over the revision history
    var history = branch.history();

    // Commit event emits commit object
    history.on("commit", function(commit) {
      // Print out `git log` emulation
      console.log("commit " + commit.sha);
      console.log(commit.author.name + "<" + commit.author.email + ">");
      console.log(commit.time);
      console.log("\n");
      console.log(commit.message);
      console.log("\n");
    });
  });
});

Raw API

var git = require( 'nodegit' ).raw;

// Create instance of Repo constructor
var repo = new git.Repo();

// Read a repository
repo.open( '.git', function( err ) {
    // Err is an integer, success is 0, use strError for string representation
    if( err ) {
        var error = new git.Error();
        throw error.strError( err );
    }

    // Create instance of Ref constructor with this repository
    var ref = new git.Ref( repo );

    // Find the master branch
    repo.lookupRef( ref, '/refs/heads/master', function( err ) {
        if( err ) {
          var error = new git.Error();
          throw error.strError( err );
        }

        // Create instance of Commit constructor with this repository
        var commit = new git.Commit( repo ),
            // Create instance of Oid constructor
            oid = new git.Oid();

        // Set the oid constructor internal reference to this branch reference
        ref.oid( oid );

        // Lookup the commit for this oid
        commit.lookup( oid, function() {
            if( err ) {
              var error = new git.Error();
              throw error.strError( err );
            }

            // Create instance of RevWalk constructor with this repository
            var revwalk = new git.RevWalk( repo );

            // Push the commit as the start to walk
            revwalk.push( commit );

            // Recursive walk
            function walk() {
                // Each revision walk iteration yields a commit
                var revisionCommit = new git.Commit( repo );

                revwalk.next( revisionCommit, function( err ) {
                    // Finish recursion once no more revision commits are left
                    if( err ) { return; }

                    // Create instance of Oid for sha
                    var oid = new git.Oid();

                    // Set oid to the revision commit
                    revisionCommit.id( oid );

                    // Create instance of Sig for author
                    var author = new git.Sig();

                    // Set the author to the revision commit author
                    revisionCommit.author( author );

                    // Convert timestamp to milliseconds and set new Date object
                    var time = new Date( revisionCommit.time() * 1000 );

                    // Print out `git log` emulation
                    console.log( oid.toString( 40 ) );
                    console.log( author.name() + '<' + author.email() + '>' );
                    console.log( time );
                    console.log( '\n' );
                    console.log( revisionCommit.message() );
                    console.log( '\n' );

                    // Recurse!
                    walk();
                });
            }

            // Initiate recursion
            walk():
        });
    });
});

Running tests

nodegit library code is written adhering to a modified JSHint. Run these checks with make lint in the project root.

To run unit tests ensure the submodules nodeunit and rimraf are located in the vendor/ subdirectory.

If they are not, cd into the nodegit dir and run the following git commands to automatically fetch them: $ cd nodegit $ git submodule update --init

Then simply run make test in the project root.

Generating documentation

nodegit native and library code is documented to be built with Natural Docs.

To create the documentation, cd into the nodegit dir and run the following: $ cd nodegit $ make doc

The documentation will then generate in the doc/ subfolder as HTML.

Release information

Can keep track of current method coverage at: http://bit.ly/tb_methods

v0.0.6:

* Updated to work with Node ~0.6.

v0.0.5:

* Added in fast Buffer support.
* Blob raw write supported added, no convenience methods yet...
* Updated libgit2 to version 0.12.0

v0.0.4:

* Many fixes!
* Blob raw write supported added, no convenience methods yet...
* Updated libgit2 to version 0.12.0

v0.0.3:

* More documented native source code
* Updated convenience api code
* More unit tests
* Updated libgit2 to version 0.11.0
* Windows Cygwin support! *albeit hacky*

v0.0.2:

* More methods implemented
* More unit tests
* More API development
* Tree and Blob support
* Updated libgit2 to version 0.8.0

v0.0.1:

* Some useful methods implemented
* Some unit tests
* Some documented source code
* Useable build/code quality check tools
* Node.js application that can be configured/built/installed via source and NPM
* An API that can be easily extended with convenience methods in JS
* An API that offers a familiar clean syntax that will make adoption and use much more likely
* Open for public testing
* GitHub landing page
* Repo, Oid, Commit, Error, Ref, and RevWalk support
* Built on libgit2 version 0.3.0

Getting involved

If you find this project of interest, please document all issues and fork if you feel you can provide a patch. Testing is of huge importance; by simply running the unit tests on your system and reporting issues you can contribute!

Before submitting a pull request, please ensure both unit tests and lint checks pass.

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