From 37a06da563d951f4c8ee82d6edde518b236ade7a Mon Sep 17 00:00:00 2001
From: Robert Jackson <rjackson@linkedin.com>
Date: Thu, 18 Mar 2021 10:51:37 -0400
Subject: [PATCH] Expose `getSupportedExtensions` method.

---
 README.md | 11 +++++++++++
 index.js  |  6 +++++-
 2 files changed, 16 insertions(+), 1 deletion(-)

diff --git a/README.md b/README.md
index 41d62668..ce6b8fbe 100755
--- a/README.md
+++ b/README.md
@@ -23,6 +23,7 @@ allow you to use latest Javascript in your Ember CLI project.
     + [Adding Custom Plugins](#adding-custom-plugins)
     + [Additional Trees](#additional-trees)
     + [`buildBabelOptions` usage](#buildbabeloptions-usage)
+    + [`getSupportedExtensions` usage](#getsupportedextensions-usage)
     + [`transpileTree` usage](#transpiletree-usage)
   * [Debug Tooling](#debug-tooling)
     + [Debug Macros](#debug-macros)
@@ -412,6 +413,16 @@ let options = babelAddon.buildBabelOptions(config)
 require('babel-core').transform('something', options);
 ```
 
+#### `getSupportedExtensions` usage
+
+```js
+// find your babel addon (can use `this.findAddonByName('ember-cli-babel')` in ember-cli@2.14 and newer)
+let babelAddon = this.addons.find(addon => addon.name === 'ember-cli-babel');
+
+// create the babel options to use elsewhere based on the config above
+let extensions = babelAddon.getSupportedExtensions(config)
+```
+
 #### `transpileTree` usage
 
 ```js
diff --git a/index.js b/index.js
index 2d775bf3..992d341d 100644
--- a/index.js
+++ b/index.js
@@ -83,6 +83,10 @@ module.exports = {
     return this._cachedDebugTree.apply(null, arguments);
   },
 
+  getSupportedExtensions(config) {
+    return _getExtensions(config, this.parent);
+  },
+
   _buildBroccoliBabelTranspilerOptions(config = {}) {
     let emberCLIBabelConfig = config["ember-cli-babel"];
 
@@ -104,7 +108,7 @@ module.exports = {
       annotation: providedAnnotation || `Babel: ${_parentName(this.parent)}`,
       sourceMaps,
       throwUnlessParallelizable,
-      filterExtensions: _getExtensions(config, this.parent),
+      filterExtensions: this.getSupportedExtensions(config),
       plugins: []
     };