gistfile1.js

var fs = require('fs'),
	readCache = {},
	Y = require('yui/handlebars'),
	templates = require('./templates'),
	partials = templates.getRaw();

function read(path, options, fn) {
	var str = readCache[path];

	// cached (only if cached is a string and not a compiled template function)
	if (options.cache && str && typeof str === 'string') return fn(null, str);

	// read
	fs.readFile(path, 'utf8', function(err, str) {
		if (err) return fn(err);
		if (options.cache) readCache[path] = str;
		fn(null, str);
	});
}

// Export a function to work as Template Engine of Express
module.exports = function(path, options, fn) {
	read(path, options, function(err, str) {
		if (err) {
			return fn(err);
		}
		try {
			var template = Y.Handlebars.compile(str),
				parsed = template(options, {
					partials: partials
				});
			if (options.layout) {
				read('views/' + options.layout + '.handlebars', options, function(err, str) {
					if (err) {
						return fn(err);
					}
					try {
						var layoutTemplate = Y.Handlebars.compile(str);
							options.body = parsed;
						var layoutParsed = layoutTemplate(options, {
								partials: partials
							});
						return fn(null, layoutParsed);
					} catch (ex) {
						fn(ex);
					}
				});
			} else {
				return fn(null, parsed);
			}
		} catch (ex) {
			fn(ex);
		}

	});
};