Express view adapter for Hogan.js

hogan-adapter.js

'use strict';
var fs = require('fs'),
		path = require('path'),
		hogan = require('hogan');

var adapter = (function() {
	var dir = 'templates',
	partials_dir = dir + '/partials',
	extension = '.hogan',
	partials = {},
	html, layout;

	//cache partials
	var files = fs.readdirSync(partials_dir);
	files.forEach(function(file){
				var str = fs.readFileSync(path.join(partials_dir, file), 'UTF-8');
				partials[path.basename(file, extension)] = hogan.compile(str);
	});

	//cache layout
	var layout_dir = path.join(dir, 'layout' + extension);
	if(path.existsSync(layout_dir)){
			var str = fs.readFileSync(layout_dir, 'UTF-8');
			layout = hogan.compile(str);
	}

	var compile = function(name) {
		return function (options) {
			var html = hogan.compile(name).render(options);
			//if we want a layout yield the requested template with a layout
			if ( layout && options.layout !== false && options.settings['use layout'] !== false) {
				options['yield'] = html;
				html = layout.render(options, partials);
			}
			return html;
		};
	}
	
	return {compile : compile};
})();

module.exports = adapter;

server.js

var express = require('express');
var adapter = require('hogan-adapter.js');
var app = express.createServer();

app.register('hogan', adapter);
app.set('views', __dirname + '/templates');
app.set('view engine', 'hogan');

app.get('/', function(req, res){
  res.render('index');
});