Gulpfile.js with Express, Livereload, Sass, Notify

Gulp Express Livereload

/*
*  dependencies: connect-livereload, express, gulp, gulp-autoprefixer, gulp-minify-css, gulp-notify, gulp-ruby-sass, tiny-lr
*  Files structure:
*  /
    - /css
    	- main.css
    - /node_modules
    - /sass
      - main.scss
    gulpfile.js
    index.html
    package.json
*/


var gulp = require('gulp');
var minifycss = require('gulp-minify-css');
var autoprefixer = require('gulp-autoprefixer');
var notify = require('gulp-notify');
var sass = require('gulp-ruby-sass');
var lr;
var EXPRESS_PORT = 8080;
var EXPRESS_ROOT = __dirname;
var LIVERELOAD_PORT = 35729;

function startLiveReload(){
	lr = require('tiny-lr')();
	lr.listen(LIVERELOAD_PORT);
}

function startExpress() {
	var express = require('express');
	var app = express();
	app.use(require('connect-livereload')());
	app.use(express.static(EXPRESS_ROOT));
	app.listen(EXPRESS_PORT);
	console.log('listening on port ' + EXPRESS_PORT);
}

function notifyLiveReload(event) {
	var fileName = require('path').relative(EXPRESS_ROOT, event.path);
	
	lr.changed({
		body: {
			files: [fileName]
		}
	});	
}


gulp.task('css', function(){
	return gulp.src('sass/main.scss')
		.pipe(sass({style: 'compressed'}))
		.pipe(autoprefixer('last 15 versions'))
		.pipe(gulp.dest('css'))
		.pipe(notify({ message: 'That\'s All Folks!'}));
});

gulp.task('default', function(){
	startExpress();
	startLiveReload();
	gulp.watch('*.html', notifyLiveReload);
	gulp.watch('css/*.css', notifyLiveReload);

	gulp.watch('sass/**/*.scss', function(){
		gulp.run('css');
	});
});