gulpfile.js

// dependencies
var gulp = require('gulp');
var git = require('gulp-git');
var bump = require('gulp-bump');
var filter = require('gulp-filter');
var tagVersion = require('gulp-tag-version');

/**
 * Bumping version number and tagging the repository with it.
 * Please read http://semver.org/
 *
 * You can use the commands
 *
 *     gulp patch     # makes v0.1.0 → v0.1.1
 *     gulp feature   # makes v0.1.1 → v0.2.0
 *     gulp release   # makes v0.2.1 → v1.0.0
 *
 * To bump the version numbers accordingly after you did a patch,
 * introduced a feature or made a backwards-incompatible release.
 */

function inc(importance) {
	// get all the files to bump version in
	return gulp.src(['./package.json'])

	// bump the version number in those files
	.pipe(bump({
		type: importance
	}))

	// save it back to filesystem
	.pipe(gulp.dest('./'))

	// commit the changed version number
	.pipe(git.commit('bumps package version'))

	// read only one file to get the version number
	.pipe(filter('package.json'))

	// **tag it in the repository**
	.pipe(tagVersion());
}

gulp.task('patch', function() {
	return inc('patch');
});

gulp.task('feature', function() {
	return inc('minor');
});

gulp.task('release', function() {
	return inc('major');
});

/**
 * Pushes changes to Github
 */
gulp.task('push-patch', ['patch'], function() {
	return git.push('origin', 'master', {
		args: '--tags'
	}, function(err) {
		if (err) throw err;
	});
});


gulp.task('push-feature', ['feature'], function() {
	return git.push('origin', 'master', {
		args: '--tags'
	}, function(err) {
		if (err) throw err;
	});
});

gulp.task('push-release', ['release'], function() {
	return git.push('origin', 'master', {
		args: '--tags'
	}, function(err) {
		if (err) throw err;
	});
});