access config from app/addon options

ember-cli-build.js

@@ -7,6 +7,14 @@ const EmberAddon = require('ember-cli/lib/broccoli/ember-addon');
 module.exports = function(defaults) {
   let app = new EmberAddon(defaults, {
     // Add options here
+    'ember-hbs-minifier': {
+      whiteList: {
+        elementNodes: ['pre', 'address'],
+        elementClassNames: ['description'],
+        components: ['foo-bar'],
+        partials: []
+      }
+    }
   });
 
   /*

index.js

@@ -4,21 +4,28 @@
 module.exports = {
   name: 'ember-hbs-minifier',
 
-  setupPreprocessorRegistry(type, registry) {
-    if (type === 'parent') {
-      let config;
-      try {
-        let path = this.isDevelopingAddon() ? `${this.project.root}/tests/dummy` : this.project.root;
-        config = require(`${path}/.hbs-minifyrc.js`);
-      } catch (error) {
-        throw error;
-      }
-      let HbsMinifierPlugin = require('./hbs-minifier-plugin')(config.whiteList);
-      registry.add('htmlbars-ast-plugin', {
-        name: 'hbs-minifier-plugin',
-        plugin: HbsMinifierPlugin,
-        baseDir() { return __dirname; }
-      });
-    }
+  _getMinifierOptions() {
+    return (this.parent && this.parent.options) || (this.app && this.app.options) || {};
+  },
+
+  _setupPreprocessorRegistry(app) {
+    let registry = app.registry;
+    let options = this._getMinifierOptions(app);
+    let config = options['ember-hbs-minifier'] || {};
+
+    let HbsMinifierPlugin = require('./hbs-minifier-plugin')(config.whiteList || {});
+    registry.add('htmlbars-ast-plugin', {
+      name: 'hbs-minifier-plugin',
+      plugin: HbsMinifierPlugin,
+      baseDir() { return __dirname; }
+    });
+  },
+  included(app) {
+    this._super.included.apply(this, arguments);
+    /*
+      Calling setupPreprocessorRegistry in included hook since app.options is not accessible
+      Refer PR: https://github.com/ember-cli/ember-cli/pull/7059
+    */
+    this._setupPreprocessorRegistry(app);
   }
 };