generate gimmer components if addon included

Author: Gaurav0

app/mixins/files.js

@@ -108,15 +108,16 @@ export default Mixin.create({
     run.scheduleOnce('afterRender', this, this.updateOpenFiles);
   },
 
-  addComponent(path) {
+  async addComponent(path) {
     //strip file extension if present
     path = path.replace(/\.[^/.]+$/, "");
 
-    let isGlimmer = false; // TODO: decide how to let user choose
+    let isGlimmer = await this.emberCli.twiddleJson.hasAddon(this.model, '@glimmer/component');
 
     if (this.isPathInvalid('component', path)) {
       return;
     }
+
     ['js', 'hbs'].forEach((fileExt, i)=>{
       let replacements = {};
       if (fileExt === 'js') {

app/services/twiddle-json.js

@@ -130,6 +130,11 @@ export default Service.extend({
     });
   },
 
+  async hasAddon(gist, addonName) {
+    let json = await this._getTwiddleJson(gist);
+    return addonName in json.addons;
+  },
+
   _dedupEmberData(json) {
     if (json.addons && json.addons.hasOwnProperty('ember-data')) {
       if (json.dependencies && json.dependencies.hasOwnProperty('ember-data')) {