start generating client-side bundle. WIP

utils/create_app.js

@@ -0,0 +1,27 @@
+const fs = require('fs');
+const path = require('path');
+const tmp = require('tmp');
+
+const template = fs.readFileSync(path.resolve(__dirname, '../templates/main.js'), 'utf-8');
+
+module.exports = function create_app(routes, dest, matchers, dev) {
+	// TODO in dev mode, watch files
+
+	const code = matchers
+		.map(matcher => {
+			const condition = matcher.dynamic.length === 0 ?
+				`url.pathname === '/${matcher.parts.join('/')}'` :
+				`${matcher.pattern}.test(url.pathname)`;
+
+			return `
+				if (${condition}) {
+					import('../routes/${matcher.file}').then(render);
+				}
+			`.replace(/^\t{3}/gm, '').trim();
+		})
+		.join(' else ');
+
+	const main = template.replace('// ROUTES', code);
+
+	fs.writeFileSync(path.join(dest, 'main.js'), main);
+};