feat: add a babel-preserve-modules config preset (#11)

Author: Adam Butterworth

config/babel-preserve-modules.config.js

@@ -0,0 +1,34 @@
+module.exports = {
+  presets: [
+    [
+      '@babel/preset-env',
+      {
+        modules: false,
+      },
+    ],
+    '@babel/preset-react',
+  ],
+  plugins: [
+    '@babel/plugin-proposal-object-rest-spread',
+    '@babel/plugin-proposal-class-properties',
+    '@babel/plugin-syntax-dynamic-import',
+  ],
+  env: {
+    i18n: {
+      plugins: [
+        [
+          'react-intl',
+          {
+            messagesDir: './temp/babel-plugin-react-intl',
+            moduleSourceName: '@edx/frontend-i18n',
+          },
+        ],
+      ],
+    },
+    test: {
+      presets: [
+        '@babel/preset-env',
+      ],
+    },
+  },
+};

lib/presets.js

@@ -14,9 +14,13 @@ module.exports = {
     configFile: getConfigFilepath('jest.config.js'),
   },
   babel: {
-    globSearchPattern: 'babel.config.js',
+    globSearchPattern: '(babel.config.js|.babelrc*)',
     configFile: getConfigFilepath('babel.config.js'),
   },
+  'babel-preserve-modules': {
+    globSearchPattern: '(babel.config.js|.babelrc*)',
+    configFile: getConfigFilepath('babel-preserve-modules.config.js'),
+  },
   'webpack-prod': {
     globSearchPattern: 'webpack.prod.config.js',
     configFile: getConfigFilepath('webpack.prod.config.js'),