gistfile1.js

var path = require('path'),
	gulp = require('gulp'),
	stylus = require('gulp-stylus'),
	nib = require('nib'),
	mincss = require('gulp-minify-css'),
	uglify = require('gulp-uglify'),
	concat = require('gulp-concat'),  
	watch = require('gulp-watch'),
	clean = require('gulp-clean'),
	nodemon = require('gulp-nodemon'),
	debug = require('gulp-debug'),
	clone = require('gulp-clone'),
	rename = require("gulp-rename"),
	es = require('event-stream'),
	fs = require('fs'),
	nconf = require('nconf');

// load settings
var publicSettings = path.join(__dirname, 'settings', 'settings.json');

if (fs.existsSync(publicSettings)) {
	nconf.use('file', {
		file: publicSettings
	});
} else {
	console.log('config does not exist')
}

nconf.load();

var site = process.env.RANKU_SITE || nconf.get('app:site');

gulp.task('build-sprites', function () {
	var spriteData = gulp.src(path.join('client', site ,'sprites','*.png'))
		.pipe(require('gulp.spritesmith')({
			// path the css ultimatly links to
			imgName: '/img/sprite.png',
			cssName: 'sprite.styl'
		}));
		spriteData.img.pipe(gulp.dest(path.join(__dirname, 'public', site, 'img')));
		spriteData.css.pipe(gulp.dest(path.join(__dirname, 'client', site, 'css')));
	return spriteData
});

gulp.task('build-scripts', function() { 
	return gulp.src(path.join('client', site, 'js', 'user', '*.js')) 
		//.pipe(debug({verbose: true}))
		.pipe(concat('user.js'))
		.pipe(uglify({outSourceMap: true}))
		.pipe(gulp.dest(path.join('public', site, 'build')));
});

gulp.task('build-stylus', function() {
	var css = gulp.src([
			path.join('public',site,'components','bootstrap','dist','css','bootstrap.css'),
			path.join('client',site,'css','**','*.styl')
		], { base: path.join('client', site) })
		//.pipe(debug({verbose: true}))
		.pipe(stylus({
			use: [nib()]
		}))
		.pipe(concat('app.css'))

	var min = css.pipe(clone())
		.pipe(mincss({
			keepSpecialComments: '0',
			root: path.join('public', site)
		}))
		.pipe(rename('app.min.css'))

	return es.merge(css, min).pipe(gulp.dest(path.join('public', site, 'build')));
});

gulp.task('clean',function() {
	return gulp.src(['public/build'], {read: false})
		.pipe(clean());
});

gulp.task('dev', function() {
	nodemon({ script: 'app.js', ext: 'js', ignore: 'public/'})
		.on('restart', ['default']);
	gulp.start("default");
});

gulp.task('build', function() {
	gulp.start("build-scripts");
	gulp.start("build-stylus");
});

gulp.task('heroku:production', function() {
	gulp.start("build");
});
gulp.task('heroku:development', function() {
	gulp.start("build");
});

gulp.task('default', ['clean'],function(){
	gulp.start("build");
	watch({glob: "client/sprites/*.png"}, function() {
		gulp.start("build-sprites");
	});
	watch({glob: path.join("client",site,"js","**","*.js")}, function() {
		gulp.start("build-scripts");
	});
	watch({glob: path.join("client",site,"css","*.styl")}, function() {
		gulp.start("build-stylus");
	});
});

gulp.task('test', function(){
    return;
});