Add deprecation warnings for split of the react and react-native packages

Summary:This adds deprecation warnings that correspond to what React 0.14 did for the web.

I.e. `React.render` -> `ReactNative.render` but also `ReactNative.createClass` -> `React.createClass`.

This hopefully means that it will become easier and more idiomatic to write components that are decoupled from the react-native package.

It will be clear when you take on react-native as a dependency such as when using findNodeHandle.

This codemod is a little more invasive for React Native because the common stuff often used the `react-native` package. For web only the uncommon stuff needed to move.

Reviewed By: spicyj

Differential Revision: D3148860

fb-gh-sync-id: d87628d2089a2e012ad6ad50dd0a20ccec5e6c45
fbshipit-source-id: d87628d2089a2e012ad6ad50dd0a20ccec5e6c45

Libraries/ReactNative/React.js

@@ -11,4 +11,33 @@
  */
 'use strict';
 
-module.exports = require('ReactNative');
+const ReactIsomorphic = require('ReactIsomorphic');
+const ReactNativeImpl = require('ReactNativeImpl');
+const warning = require('warning');
+
+const React = { ...ReactIsomorphic };
+
+const dedupe = {};
+
+for (const key in ReactNativeImpl) {
+  React[key] = ReactNativeImpl[key];
+  if (__DEV__) {
+    Object.defineProperty(React, key, {
+      get: function() {
+        warning(
+          dedupe[key],
+          'React.' + key + ' is deprecated. Use ReactNative.' + key +
+          ' from the "react-native" package instead.'
+        );
+        dedupe[key] = true;
+        return ReactNativeImpl[key];
+      },
+      set: function(value) {
+        // Useful for hacky solutions like createExamplePage.
+        ReactNativeImpl[key] = value;
+      },
+    });
+  }
+}
+
+module.exports = React;

Libraries/ReactNative/ReactNative.js

@@ -11,128 +11,47 @@
  */
 'use strict';
 
-// Require ReactNativeDefaultInjection first for its side effects of setting up
-// the JS environment
-var ReactNativeDefaultInjection = require('ReactNativeDefaultInjection');
+const ReactIsomorphic = require('ReactIsomorphic');
+const ReactNativeImpl = require('ReactNativeImpl');
+const warning = require('warning');
 
-var ReactChildren = require('ReactChildren');
-var ReactClass = require('ReactClass');
-var ReactComponent = require('ReactComponent');
-var ReactCurrentOwner = require('ReactCurrentOwner');
-var ReactElement = require('ReactElement');
-var ReactElementValidator = require('ReactElementValidator');
-var ReactInstanceHandles = require('ReactInstanceHandles');
-var ReactNativeMount = require('ReactNativeMount');
-var ReactPropTypes = require('ReactPropTypes');
-var ReactUpdates = require('ReactUpdates');
+const ReactNative = { ...ReactNativeImpl };
 
-var findNodeHandle = require('findNodeHandle');
-var invariant = require('fbjs/lib/invariant');
-var onlyChild = require('onlyChild');
-var warning = require('fbjs/lib/warning');
-
-ReactNativeDefaultInjection.inject();
-
-var createElement = ReactElement.createElement;
-var createFactory = ReactElement.createFactory;
-var cloneElement = ReactElement.cloneElement;
+const dedupe = {};
 
 if (__DEV__) {
-  createElement = ReactElementValidator.createElement;
-  createFactory = ReactElementValidator.createFactory;
-  cloneElement = ReactElementValidator.cloneElement;
+  for (const key in ReactNativeImpl) {
+    Object.defineProperty(ReactNative, key, {
+      get: function() {
+        return ReactNativeImpl[key];
+      },
+      set: function(value) {
+        // Useful for hacky solutions like createExamplePage.
+        ReactNativeImpl[key] = value;
+      },
+    });
+  }
 }
 
-var resolveDefaultProps = function(element) {
-  // Could be optimized, but not currently in heavy use.
-  var defaultProps = element.type.defaultProps;
-  var props = element.props;
-  for (var propName in defaultProps) {
-    if (props[propName] === undefined) {
-      props[propName] = defaultProps[propName];
-    }
-  }
-};
-
-// Experimental optimized element creation
-var augmentElement = function(element: ReactElement): ReactElement {
+for (const key in ReactIsomorphic) {
+  ReactNative[key] = ReactIsomorphic[key];
   if (__DEV__) {
-    invariant(
-      false,
-      'This optimized path should never be used in DEV mode because ' +
-      'it does not provide validation. Check your JSX transform.'
-    );
+    Object.defineProperty(ReactNative, key, {
+      get: function() {
+        warning(
+          dedupe[key],
+          'ReactNative.' + key + ' is deprecated. Use React.' + key +
+          ' from the "react" package instead.'
+        );
+        dedupe[key] = true;
+        return ReactIsomorphic[key];
+      },
+      set: function(value) {
+        // Useful for hacky solutions like createExamplePage.
+        ReactIsomorphic[key] = value;
+      },
+    });
   }
-  element._owner = ReactCurrentOwner.current;
-  if (element.type.defaultProps) {
-    resolveDefaultProps(element);
-  }
-  return element;
-};
-
-var render = function(
-  element: ReactElement,
-  mountInto: number,
-  callback?: ?(() => void)
-): ?ReactComponent {
-  return ReactNativeMount.renderComponent(element, mountInto, callback);
-};
-
-var ReactNative = {
-  hasReactNativeInitialized: false,
-  Children: {
-    map: ReactChildren.map,
-    forEach: ReactChildren.forEach,
-    count: ReactChildren.count,
-    toArray: ReactChildren.toArray,
-    only: onlyChild
-  },
-  Component: ReactComponent,
-  PropTypes: ReactPropTypes,
-  createClass: ReactClass.createClass,
-  createElement: createElement,
-  createFactory: createFactory,
-  cloneElement: cloneElement,
-  _augmentElement: augmentElement,
-  findNodeHandle: findNodeHandle,
-  render: render,
-  unmountComponentAtNode: ReactNativeMount.unmountComponentAtNode,
-
-  /* eslint-disable camelcase */
-  unstable_batchedUpdates: ReactUpdates.batchedUpdates,
-  /* eslint-enable camelcase */
-
-  // Hook for JSX spread, don't use this for anything else.
-  __spread: Object.assign,
-
-  unmountComponentAtNodeAndRemoveContainer: ReactNativeMount.unmountComponentAtNodeAndRemoveContainer,
-  isValidClass: ReactElement.isValidFactory,
-  isValidElement: ReactElement.isValidElement,
-
-  // Deprecations (remove for 0.13)
-  renderComponent: function(
-    element: ReactElement,
-    mountInto: number,
-    callback?: ?(() => void)
-  ): ?ReactComponent {
-    warning('Use React.render instead of React.renderComponent');
-    return ReactNative.render(element, mountInto, callback);
-  },
-};
-
-// Inject the runtime into a devtools global hook regardless of browser.
-// Allows for debugging when the hook is injected on the page.
-/* globals __REACT_DEVTOOLS_GLOBAL_HOOK__ */
-if (
-  typeof __REACT_DEVTOOLS_GLOBAL_HOOK__ !== 'undefined' &&
-  typeof __REACT_DEVTOOLS_GLOBAL_HOOK__.inject === 'function') {
-  __REACT_DEVTOOLS_GLOBAL_HOOK__.inject({
-    CurrentOwner: ReactCurrentOwner,
-    InstanceHandles: ReactInstanceHandles,
-    Mount: ReactNativeMount,
-    Reconciler: require('ReactReconciler'),
-    TextComponent: require('ReactNativeTextComponent'),
-  });
 }
 
 module.exports = ReactNative;

Libraries/ReactNative/ReactNativeImpl.js

@@ -0,0 +1,64 @@
+/**
+ * Copyright (c) 2015-present, Facebook, Inc.
+ * All rights reserved.
+ *
+ * This source code is licensed under the BSD-style license found in the
+ * LICENSE file in the root directory of this source tree. An additional grant
+ * of patent rights can be found in the PATENTS file in the same directory.
+ *
+ * @providesModule ReactNativeImpl
+ * @flow
+ */
+'use strict';
+
+// Require ReactNativeDefaultInjection first for its side effects of setting up
+// the JS environment
+var ReactNativeDefaultInjection = require('ReactNativeDefaultInjection');
+
+var ReactCurrentOwner = require('ReactCurrentOwner');
+var ReactElement = require('ReactElement');
+var ReactInstanceHandles = require('ReactInstanceHandles');
+var ReactNativeMount = require('ReactNativeMount');
+var ReactUpdates = require('ReactUpdates');
+
+var findNodeHandle = require('findNodeHandle');
+
+ReactNativeDefaultInjection.inject();
+
+var render = function(
+  element: ReactElement,
+  mountInto: number,
+  callback?: ?(() => void)
+): ?ReactComponent {
+  return ReactNativeMount.renderComponent(element, mountInto, callback);
+};
+
+var ReactNative = {
+  hasReactNativeInitialized: false,
+  findNodeHandle: findNodeHandle,
+  render: render,
+  unmountComponentAtNode: ReactNativeMount.unmountComponentAtNode,
+
+  /* eslint-disable camelcase */
+  unstable_batchedUpdates: ReactUpdates.batchedUpdates,
+  /* eslint-enable camelcase */
+
+  unmountComponentAtNodeAndRemoveContainer: ReactNativeMount.unmountComponentAtNodeAndRemoveContainer,
+};
+
+// Inject the runtime into a devtools global hook regardless of browser.
+// Allows for debugging when the hook is injected on the page.
+/* globals __REACT_DEVTOOLS_GLOBAL_HOOK__ */
+if (
+  typeof __REACT_DEVTOOLS_GLOBAL_HOOK__ !== 'undefined' &&
+  typeof __REACT_DEVTOOLS_GLOBAL_HOOK__.inject === 'function') {
+  __REACT_DEVTOOLS_GLOBAL_HOOK__.inject({
+    CurrentOwner: ReactCurrentOwner,
+    InstanceHandles: ReactInstanceHandles,
+    Mount: ReactNativeMount,
+    Reconciler: require('ReactReconciler'),
+    TextComponent: require('ReactNativeTextComponent'),
+  });
+}
+
+module.exports = ReactNative;

Libraries/react-native/react-native.js

@@ -115,12 +115,26 @@ var ReactNative = {
     get createFragment() { return require('ReactFragment').create; },
     get update() { return require('update'); },
   },
-
-  // Note: this must be placed last to prevent eager
-  // evaluation of the getter-wrapped submodules above
-  ...require('React'),
 };
 
+// Preserve getters with warnings on the internal ReactNative copy without
+// invoking them.
+var ReactNativeInternal = require('ReactNative');
+function applyForwarding(key) {
+  if (__DEV__) {
+    Object.defineProperty(
+      ReactNative,
+      key,
+      Object.getOwnPropertyDescriptor(ReactNativeInternal, key)
+    );
+    return;
+  }
+  ReactNative[key] = ReactNativeInternal[key];
+}
+for (var key in ReactNativeInternal) {
+  applyForwarding(key);
+}
+
 if (__DEV__) {
   Object.defineProperty(ReactNative.addons, 'Perf', {
     enumerable: true,