[common] udpate proto

build/prepare.js

@@ -23,10 +23,16 @@ const prepare = (...targets) => function prepare() {
     return Promise.all(tasks);
 };
 
-
 const update = () => {
     return new Haxe().upgrade();
 };
 
+const generate = () => function generate() {
+    return new Haxe().haxelib([
+        'run', 'protohx', 'generate', 'protohx.json'
+    ]);
+};
+
 module.exports = prepare;
 module.exports.update = update;
+module.exports.generate = generate;