rename babel-transformer files from ts to tsx

Summary: group files rename

Reviewed By: passy

Differential Revision: D33889860

fbshipit-source-id: 888e173fc72b5e126c1e41324b6cae6be29274c5

desktop/babel-transformer/src/import-react.tsx

@@ -0,0 +1,57 @@
+/**
+ * Copyright (c) Meta Platforms, Inc. and affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @format
+ */
+
+import {
+  variableDeclarator,
+  variableDeclaration,
+  identifier,
+  callExpression,
+  stringLiteral,
+  memberExpression,
+  Identifier,
+  Program,
+} from '@babel/types';
+import {NodePath} from '@babel/traverse';
+
+module.exports = () => ({
+  name: 'infinity-import-react',
+  visitor: {
+    Program: {
+      exit(path: NodePath<Program>, state: any) {
+        if (state.get('NEEDS_REACT')) {
+          path.unshiftContainer('body', [
+            variableDeclaration('var', [
+              variableDeclarator(
+                identifier('React'),
+                callExpression(identifier('require'), [stringLiteral('react')]),
+              ),
+            ]),
+          ]);
+        }
+      },
+    },
+
+    ReferencedIdentifier(path: NodePath<Identifier>, state: any) {
+      // mark react as needing to be imported
+      if (path.node.name === 'React' && !path.scope.getBinding('React')) {
+        state.set('NEEDS_REACT', true);
+      }
+
+      // replace Buffer with require('buffer')
+      if (path.node.name === 'Buffer' && !path.scope.getBinding('Buffer')) {
+        path.replaceWith(
+          memberExpression(
+            callExpression(identifier('require'), [stringLiteral('buffer')]),
+            identifier('Buffer'),
+          ),
+        );
+      }
+    },
+  },
+});