gulpfile.js

var gulp       = require('gulp');
var sass       = require('gulp-ruby-sass');
var connect    = require('gulp-connect');
var browserify = require('browserify');
var source     = require('vinyl-source-stream');

gulp.task('connect', function () {
	connect.server({
		root: 'public',
		port: 4000
	});
});

gulp.task('browserify', function() {
	// Grabs the app.js file
	return browserify('./app/app.js')
	// bundles it and creates a file called main.js
	.bundle()
	.pipe(source('main.js'))
	// saves it the public/js/ directory
	.pipe(gulp.dest('./public/js/'));
});

gulp.task('sass', function() {
	return sass('scss/style.scss')
	.pipe(gulp.dest('public/css'));
});

gulp.task('watch', function() {
	gulp.watch('app/**/*.js', ['browserify']);
	gulp.watch('scss/style.scss', ['sass']);
});

gulp.task('default', ['connect', 'watch']);