gulpfile.js

'use strict;';
var gulp = require('gulp')
  , gutil = require('gulp-util')
  , uglify = require('gulp-uglify')
  , concat = require('gulp-concat')
  , ngAnnotate = require('gulp-ng-annotate')
  , sourcemaps = require('gulp-sourcemaps')
  ;

gulp.task('default', function(){
	return gutil.log('Gulp is Running!');
});

gulp.task('build-js', function(){
	return gulp.src('source/javascript/**/*.js')
			.pipe(sourcemaps.init())
				.pipe(ngAnnotate({'single_quotes': false}))
				.pipe(concat('bundle.js'))
				.pipe(gutil.env.type === 'production' ? uglify() : gutil.noop())
			.pipe(sourcemaps.write())
			.pipe(gulp.dest('public/assets/javascript/'));
});