Git handler through Gulp, read hive.ir or contact me for more details.

gulpfile.js

// Example for handling git through gulp. Useful receipt for sometimes ;)
// hive.ir - made by Ehsaan <iehsan.ir@gmail.com>
// gulpfile.js
var gulp = require( 'gulp' );
var git = require( 'gulp-git' );
var minifyCss = require( 'gulp-minify-css' );
var uglify = require( 'gulp-uglify' );
var concat = require( 'gulp-concat' );
var fs = require( 'fs' );

const repo = "https://EhsaanF@github.com/EhsaanF/wp.com-oauth.git";
const repo_name = "wp.com-oauth";

gulp.task( 'download', function() {
    if ( fs.existsSync( repo_name ) ) {
        git.pull( 'origin', 'master', { cwd: './' + repo_name + '/' }, function( err ) {
            if ( err ) throw err;
        } );
    } else {
        git.clone( repo, function( err ) {
            if ( err ) throw err;
        } );
    }
} );

gulp.task( 'build-css', [ 'download' ], function() {
    return  gulp.src( repo_name + '/css/*.css' )
            .pipe( minifyCss() )
            .pipe( concat( 'package.css' ) )
            .pipe( gulp.dest( repo_name + '/dist/' ) );
} );

gulp.task( 'build-js', [ 'download' ], function() {
    return  gulp.src( repo_name + '/js/*.js' )
            .pipe( uglify() )
            .pipe( concat( 'build.js' ) )
            .pipe( gulp.dest( repo_name + '/dist/' ) );
} );

gulp.task( 'add', [ 'build-css', 'build-js' ], function() {
    return  gulp.src( './' + repo_name + '/dist/**/*.*' )
            .pipe( git.add( { cwd: './' + repo_name + '/' } ) );
} );

gulp.task( 'commit', [ 'add' ], function() {
    return  gulp.src( './' + repo_name + '/dist/**/*.*' )
            .pipe( git.commit( 'Automated Build by Gulp', { cwd: './' + repo_name + '/' } ) );
} );

gulp.task( 'push', [ 'commit' ], function() {
    git.push( 'origin', 'master', { cwd: './' + repo_name + '/', args: ' -u' },  function( err ) {
        if ( err ) throw err;
    } );
} );

// Now, default task to run all them in arrange
gulp.task( 'default', function() {
    gulp.start( 'download', 'build-css', 'build-js', 'add', 'commit', 'push' ); // and Done!
} );

Great tutorial ehsan !
Can I write my own commit message by using Gulp instead of 'Automated Build by Gulp' ?