code: function () {
  		var start = Date.now();
  		gutil.log('Building APP bundle');
  		appBundler.bundle()
  			.on('error', gutil.log)
  			.pipe(source('main.js'))
  			.pipe(gulpif(!isDevelopment, streamify(uglify())))
  			.pipe(gulp.dest(configs.folders[options.environment]))
  			.pipe(notify(function () {
  				gutil.log('APP bundle built in ' + (Date.now() - start) + 'ms');
  			}))
  			.pipe(connect.reload());
  	}
docs: We set our dependencies as externals on our app bundler when developing (isDevelopment ? dependencies : []).forEach(function (dep) { appBundler.external(dep); }); The rebundle process