gulpfile.js

function js ( ) {
	var stream =  gulp.src([ 'src/**/_*.js', 'src/**/*.js' ] )
		.pipe(sourcemaps.init())
			.pipe(cached('js'))
			.pipe(plumber())
			.pipe(babel( {
				blacklist: [ "useStrict" ],
				babelHelpers: {
					outputType: 'var'
				}
			}, './helpers.js', './helpers.js'))
			.pipe(uglify())
			.pipe(remember('js'))
			.pipe(concat('vorm.js', { newLine: '' }))
		.pipe(sourcemaps.write('.'))
		.pipe(gulp.dest('.'));
		
	return stream;
}

gulp.task('js', js);

gulp.task('helper', function ( ) {
	
	var stream = gulp.src('./helpers.js')
		.pipe(uglify())
		.pipe(addsrc.append('./vorm.js'))
		.pipe(concat('vorm.js', { newLine: ''}))
		.pipe(header('"use strict";'))
		.pipe(gulp.dest('.'));
		
	stream.on('end', function ( ) {
		fs.unlinkSync('./helpers.js');
	});
	
	return stream;
	
})

gulp.task('build', function ( ) {
	
	runSequence('js', 'helper');
	
});