gistfile1.js

var fs = require('fs'),

	// CONFIG OPTIONS
	basePath = './static/js/',
	buildPath = basePath + 'build/app.js',
	templatePath = basePath + 'templates/'
	filePaths = [
		'libs/jquery.js',
		'libs/ember.js',
		'libs/ember-data.js',

		'app.js',
		'libs/rest-adapter.js',

		'store/',
		'controllers/',
		'models/',
		'fixtures/',
		'views/',
		'statechart/'
	],


	// HELPERS
	readPath = function (path) {
		var stat = fs.statSync(path);

		if (stat.isDirectory()) {
			var paths = [];
			path = path.charAt(path.length-1) === '/' ? path : path + '/';

			var files = fs.readdirSync(path);

			if (files.length) {
				for (var i = 0, l = files.length; i < l; i++) {
					paths.push(readPath(path + files[i]));
				}

				return paths.join('');
			}

		} else if (stat.isFile() && path.indexOf('.swp') === -1){
			var file = fs.readFileSync(path, 'utf-8');
			return file;
		}
	},

	build = function () {
		var files = [];


		filePaths.forEach(function (path) {
			files.push(readPath(basePath + path));
		});

		files.push(injectTemplates());

		files.push(readPath(basePath + 'main.js'));

		fs.writeFile(buildPath, files.join(''), 'utf-8', function (err, data) {
			if (err) throw err;

			var d = new Date();
			console.log(d.getHours() + ':' + d.getMinutes() + ' - JS built to ->' + buildPath);
		});
	},

	injectTemplates = function () {
		var templates = [];
		var files = fs.readdirSync(templatePath);

		files.forEach(function (file) {
			if (file.indexOf('.swp') === -1) {
				var html = fs.readFileSync(templatePath + file, 'utf-8');
				html = html.replace(/"/g, '\\"');
				html = html.replace(/(\r\n|[\r\n])/g, '');
				html = 'Ember.TEMPLATES[\'' + file.replace('.html', '') + '\'] = Ember.Handlebars.compile("' + html + '");';
				templates.push(html);
			}
		});

		return templates.join('');
	};


desc('Build our application javascript files into a single file.');
task('build', [], function () {
	build();
});


desc('Watches our application javascript files and rebuilds when they chagne.');
task('watch', [], function () {
	var watchFile = function (path) {
			var stat = fs.statSync(path);
	
			if (stat.isDirectory()) {
				watchDir(path);	
			} else if (!/\.[swp|swo]/.test(path)) {
				fs.watchFile(path, { interval: 50 }, function (prev, curr) {
					if (+prev.mtime !== +curr.mtime) {
						console.log('Change detected in ' + path);
						build();
					}
				});
			}
		},

		watchDir = function (path) {
			fs.readdir(path, function (err, files) {
				if (err) throw err;	

				files.forEach(function (file) {
					watchFile(path + '/' + file);
				});
			});
		};

	filePaths.forEach(function (path) {
		watchFile(basePath + path);
	});
});