render

gulpfile.js

var render = require('./app/render.js');

// Build our templates
gulp.task('templates', function() {
	render.render(templateData.JS, templateData.CSS);
})

render.js

var lang = require('./locales/lang.js');
var Handlebars = require('handlebars');
var fs = require('fs');

var maxDepth = 10;
var allowedExtensions = ['hb', 'hbs', 'handlebars', 'html'];

var isDir = function (filename) {
	var stats = fs.statSync(filename);
	return stats && stats.isDirectory();
};

var isHandlebars = function (filename) {
	return allowedExtensions.indexOf(filename.split('.').pop()) !== -1;
};

var partialName = function (filename, base) {
	var name = filename.substr(0, filename.lastIndexOf('.'));
	name = name.replace(new RegExp('^' + base + '\\/'), '');
	return name.substring(name.charAt(0) === '_' ? 1 : 0);
};


var registerPartial = function (filename, base) {
	if (!isHandlebars(filename)) { return; }
	var name = partialName(filename, base);
	var template = fs.readFileSync(filename, 'utf8');
	Handlebars.registerPartial(name, template);
};

var registerPartials = function (dir, base, depth) {
	if (depth > maxDepth) { return; }
	base = base || dir;
	fs.readdirSync(dir).forEach(function (basename) {
		var filename = dir + '/' + basename;
		if (isDir(filename)) {
			registerPartials(filename, base);
		} else {
			registerPartial(filename, base);
		}
	});
};


registerPartials('./app/templates/partials','./app/templates/partials',0);

var sites = [];
var getSites = function(){
	sites = [];
	fs.readdir('./app/templates/', function(error, files){
	files.splice(files.indexOf('partials'),1);
		for (var i = 0; i < files.length; i++) {
			if(files[i].indexOf('.') > -1){

			} else {
				sites.push(files[i]);
			}
		};
		console.log('got em si', sites)
	});
}
//getSites();




var getData = new Promise(function(resolve, reject) {

	var getFolders = new Promise(function(resolve, reject) {
		var sites = [];
		fs.readdir('./app/templates/', function(error, files){
			if(error){
				reject(Error("getFolders broke"));
			}
			files.splice(files.indexOf('partials'),1);
			for (var i = 0; i < files.length; i++) {
				if(files[i].indexOf('.') > -1){

				} else {
					sites.push(files[i]);
				}
			};
			resolve(sites);
		});
	});

	var getLang = new Promise(function(resolve, reject) {
		var langs = [];
		fs.readdir('./app/locales', function(error, files){
			if(error){
				reject(Error("getLang broke"));
			}
			langs = [];
			files.splice(files.indexOf('lang.js'),1);
			for (var i = 0; i < files.length; i++) {
				langs.push(files[i].split('.')[0]);
			}
			resolve(langs);
		});
	});

	Promise.all([getFolders,getLang]).then(function(data){
		resolve(data);
	}).catch(function(err) {
		reject(Error("getData broke"));
	})

});



module.exports.render = function(js,css){
	/*
	var hbs = fs.readFileSync('./app/templates/index.hbs', 'utf8');
	var template = Handlebars.compile(hbs);
	console.log(template);
	return true;
	*/

	return getData.then(function(data){
		console.log('all data ready',data)
	})


}

module.exports.handlebars = Handlebars;

@hussfelt here is the guts
https://github.com/kaanon/gulp-compile-handlebars/blob/master/index.js