Deploy to GitHub Pages with Gulp.js

gulpfile.js

var gulp = require('gulp');
var gutil = require('gulp-util');
var path = require('path');

// Settings
var deployUrl = 'https://github.com/{name}/{name}.github.io.git';
var buildPath = './build';

// Build website into the `./build` folder
gulp.task('build', function () {
    // Your custom build steps go here
});

// Deploy from the `./build` folder to GitHub Pages.
// For more information, please visit: https://pages.github.com
gulp.task('deploy', ['build'], function (cb) {
    var exec = require('child_process').exec;
    var cwd = path.join(__dirname, buildPath);
    var cmd = 'git init && ' +
              'git remote add origin ' + deployUrl + ' && ' +
              'git add . && git commit -m Release && ' +
              'git push -f origin master';

    exec(cmd, { 'cwd': cwd }, function (err, stdout, stderr) {
        if (err !== null) {
            cb(err);
        } else {
            gutil.log(stdout, stderr);
            cb();
        }
    });
});

gulpjs/gulp#501