Initial commit 🎉

fbshipit-source-id: b6fc29740c6875d2e78953b8a7123890a67930f2
Co-authored-by: Sebastian McKenzie <sebmck@fb.com>
Co-authored-by: John Knox <jknox@fb.com>
Co-authored-by: Emil Sjölander <emilsj@fb.com>
Co-authored-by: Pritesh Nandgaonkar <prit91@fb.com>

static/transforms/import-react.js

@@ -0,0 +1,51 @@
+/**
+ * Copyright 2018-present Facebook.
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ * @format
+ */
+
+module.exports = function(babel) {
+  const t = babel.types;
+
+  return {
+    name: 'infinity-import-react',
+    visitor: {
+      Program: {
+        exit(path, state) {
+          if (state.get('NEEDS_REACT')) {
+            path.unshiftContainer('body', [
+              t.variableDeclaration('var', [
+                t.variableDeclarator(
+                  t.identifier('React'),
+                  t.callExpression(t.identifier('require'), [
+                    t.stringLiteral('react'),
+                  ]),
+                ),
+              ]),
+            ]);
+          }
+        },
+      },
+
+      ReferencedIdentifier(path, state) {
+        // 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(
+            t.memberExpression(
+              t.callExpression(t.identifier('require'), [
+                t.stringLiteral('buffer'),
+              ]),
+              t.identifier('Buffer'),
+            ),
+          );
+        }
+      },
+    },
+  };
+};