From 8e876d244cbfd0cf150db7a372f0908cd0ce1a8d Mon Sep 17 00:00:00 2001
From: rivenhk <adamsau@hotmail.com.hk>
Date: Wed, 29 Nov 2017 00:57:22 +0800
Subject: [PATCH] Move ReactFiberTreeReflection to react-reconciler/reflection 
 (#11683)

* Move ReactFiberTreeReflection to react-reconciler/reflection #11659

* Use * for react-reconciler

We don't know the latest local version, and release script currently doesn't bump deps automatically.

* Remove unused field

* Use CommonJS in entry point for consistency

* Undo the CommonJS change

I didn't realize it would break the build.

* Record sizes

* Remove reconciler fixtures

They're unnecessary now that we run real tests on reconciler bundles.
---
 fixtures/reconciler/README.md                 |  14 -
 fixtures/reconciler/index.js                  | 371 ------------------
 fixtures/reconciler/package.json              |  14 -
 fixtures/reconciler/yarn.lock                 | 106 -----
 packages/react-dom/src/client/ReactDOMFB.js   |   2 +-
 .../src/events/ReactDOMEventListener.js       |   2 +-
 .../src/test-utils/ReactTestUtils.js          |   2 +-
 .../src/ReactNativeFiberInspector.js          |   2 +-
 packages/react-noop-renderer/package.json     |   3 +-
 packages/react-noop-renderer/src/ReactNoop.js |   7 -
 packages/react-reconciler/npm/reflection.js   |   7 +
 packages/react-reconciler/package.json        |   1 +
 packages/react-reconciler/reflection.js       |  12 +
 .../src/ReactFiberClassComponent.js           |   2 +-
 .../react-reconciler/src/ReactFiberContext.js |   2 +-
 .../src/ReactFiberReconciler.js               |   2 +-
 .../src}/ReactFiberTreeReflection.js          |  10 +-
 .../src/ReactNativeRTFiberInspector.js        |   2 +-
 .../src/ReactTestRenderer.js                  |   2 +-
 scripts/circleci/build.sh                     |   5 -
 scripts/rollup/bundles.js                     |  10 +
 scripts/rollup/results.json                   |  16 +-
 22 files changed, 58 insertions(+), 536 deletions(-)
 delete mode 100644 fixtures/reconciler/README.md
 delete mode 100644 fixtures/reconciler/index.js
 delete mode 100644 fixtures/reconciler/package.json
 delete mode 100644 fixtures/reconciler/yarn.lock
 create mode 100644 packages/react-reconciler/npm/reflection.js
 create mode 100644 packages/react-reconciler/reflection.js
 rename packages/{shared => react-reconciler/src}/ReactFiberTreeReflection.js (96%)

diff --git a/fixtures/reconciler/README.md b/fixtures/reconciler/README.md
deleted file mode 100644
index 5c3ea3122dc2..000000000000
--- a/fixtures/reconciler/README.md
+++ /dev/null
@@ -1,14 +0,0 @@
-# React Reconciler Test Fixture
-
-This folder exists for **React contributors** only.
-If you use React you don't need to worry about it.
-
-These fixtures are a smoke-screen verification that the built React Reconciler distribution works.
-
-To test, from the project root:
-* `yarn build`
-* `cd fixtures/reconciler`
-* `yarn`
-* `yarn test`
-
-They should run as part of the CI check.
diff --git a/fixtures/reconciler/index.js b/fixtures/reconciler/index.js
deleted file mode 100644
index 091fa8b919f9..000000000000
--- a/fixtures/reconciler/index.js
+++ /dev/null
@@ -1,371 +0,0 @@
-/**
- * This is a renderer of React that doesn't have a render target output.
- * It is used to test that the react-reconciler package doesn't blow up.
- *
- * @flow
- */
-'use strict';
-
-var React = require('react');
-var assert = require('assert');
-var ReactFiberReconciler = require('react-reconciler');
-var emptyObject = require('fbjs/lib/emptyObject');
-var assert = require('assert');
-
-const UPDATE_SIGNAL = {};
-
-var scheduledCallback = null;
-
-type Container = {rootID: string, children: Array<Instance | TextInstance>};
-type Props = {prop: any, hidden?: boolean};
-type Instance = {|
-  type: string,
-  id: number,
-  children: Array<Instance | TextInstance>,
-  prop: any,
-|};
-type TextInstance = {|text: string, id: number|};
-
-var instanceCounter = 0;
-
-function appendChild(
-  parentInstance: Instance | Container,
-  child: Instance | TextInstance
-): void {
-  const index = parentInstance.children.indexOf(child);
-  if (index !== -1) {
-    parentInstance.children.splice(index, 1);
-  }
-  parentInstance.children.push(child);
-}
-
-function insertBefore(
-  parentInstance: Instance | Container,
-  child: Instance | TextInstance,
-  beforeChild: Instance | TextInstance
-): void {
-  const index = parentInstance.children.indexOf(child);
-  if (index !== -1) {
-    parentInstance.children.splice(index, 1);
-  }
-  const beforeIndex = parentInstance.children.indexOf(beforeChild);
-  if (beforeIndex === -1) {
-    throw new Error('This child does not exist.');
-  }
-  parentInstance.children.splice(beforeIndex, 0, child);
-}
-
-function removeChild(
-  parentInstance: Instance | Container,
-  child: Instance | TextInstance
-): void {
-  const index = parentInstance.children.indexOf(child);
-  if (index === -1) {
-    throw new Error('This child does not exist.');
-  }
-  parentInstance.children.splice(index, 1);
-}
-
-var NoopRenderer = ReactFiberReconciler({
-  getRootHostContext() {
-    return emptyObject;
-  },
-
-  getChildHostContext() {
-    return emptyObject;
-  },
-
-  getPublicInstance(instance) {
-    return instance;
-  },
-
-  createInstance(type: string, props: Props): Instance {
-    const inst = {
-      id: instanceCounter++,
-      type: type,
-      children: [],
-      prop: props.prop,
-    };
-    // Hide from unit tests
-    Object.defineProperty(inst, 'id', {value: inst.id, enumerable: false});
-    return inst;
-  },
-
-  appendInitialChild(
-    parentInstance: Instance,
-    child: Instance | TextInstance
-  ): void {
-    parentInstance.children.push(child);
-  },
-
-  finalizeInitialChildren(
-    domElement: Instance,
-    type: string,
-    props: Props
-  ): boolean {
-    return false;
-  },
-
-  prepareUpdate(
-    instance: Instance,
-    type: string,
-    oldProps: Props,
-    newProps: Props
-  ): null | {} {
-    return UPDATE_SIGNAL;
-  },
-
-  shouldSetTextContent(type: string, props: Props): boolean {
-    return (
-      typeof props.children === 'string' || typeof props.children === 'number'
-    );
-  },
-
-  shouldDeprioritizeSubtree(type: string, props: Props): boolean {
-    return !!props.hidden;
-  },
-
-  now: Date.now,
-
-  createTextInstance(
-    text: string,
-    rootContainerInstance: Container,
-    hostContext: Object,
-    internalInstanceHandle: Object
-  ): TextInstance {
-    var inst = {text: text, id: instanceCounter++};
-    // Hide from unit tests
-    Object.defineProperty(inst, 'id', {value: inst.id, enumerable: false});
-    return inst;
-  },
-
-  scheduleDeferredCallback(callback) {
-    if (scheduledCallback) {
-      throw new Error(
-        'Scheduling a callback twice is excessive. Instead, keep track of ' +
-          'whether the callback has already been scheduled.'
-      );
-    }
-    scheduledCallback = callback;
-  },
-
-  prepareForCommit(): void {},
-
-  resetAfterCommit(): void {},
-
-  mutation: {
-    commitMount(instance: Instance, type: string, newProps: Props): void {
-      // Noop
-    },
-
-    commitUpdate(
-      instance: Instance,
-      updatePayload: Object,
-      type: string,
-      oldProps: Props,
-      newProps: Props
-    ): void {
-      instance.prop = newProps.prop;
-    },
-
-    commitTextUpdate(
-      textInstance: TextInstance,
-      oldText: string,
-      newText: string
-    ): void {
-      textInstance.text = newText;
-    },
-
-    appendChild: appendChild,
-    appendChildToContainer: appendChild,
-    insertBefore: insertBefore,
-    insertInContainerBefore: insertBefore,
-    removeChild: removeChild,
-    removeChildFromContainer: removeChild,
-
-    resetTextContent(instance: Instance): void {},
-  },
-});
-
-var rootContainers = new Map();
-var roots = new Map();
-var DEFAULT_ROOT_ID = '<default>';
-
-let yieldedValues = null;
-
-function* flushUnitsOfWork(n: number): Generator<Array<mixed>, void, void> {
-  var didStop = false;
-  while (!didStop && scheduledCallback !== null) {
-    var cb = scheduledCallback;
-    scheduledCallback = null;
-    yieldedValues = null;
-    var unitsRemaining = n;
-    cb({
-      timeRemaining() {
-        if (yieldedValues !== null) {
-          return 0;
-        }
-        if (unitsRemaining-- > 0) {
-          return 999;
-        }
-        didStop = true;
-        return 0;
-      },
-    });
-
-    if (yieldedValues !== null) {
-      const values = yieldedValues;
-      yieldedValues = null;
-      yield values;
-    }
-  }
-}
-
-var Noop = {
-  getChildren(rootID: string = DEFAULT_ROOT_ID) {
-    const container = rootContainers.get(rootID);
-    if (container) {
-      return container.children;
-    } else {
-      return null;
-    }
-  },
-
-  // Shortcut for testing a single root
-  render(element: React$Element<any>, callback: ?Function) {
-    Noop.renderToRootWithID(element, DEFAULT_ROOT_ID, callback);
-  },
-
-  renderToRootWithID(
-    element: React$Element<any>,
-    rootID: string,
-    callback: ?Function
-  ) {
-    let root = roots.get(rootID);
-    if (!root) {
-      const container = {rootID: rootID, children: []};
-      rootContainers.set(rootID, container);
-      root = NoopRenderer.createContainer(container);
-      roots.set(rootID, root);
-    }
-    NoopRenderer.updateContainer(element, root, null, callback);
-  },
-
-  flush(): Array<mixed> {
-    return Noop.flushUnitsOfWork(Infinity);
-  },
-
-  flushUnitsOfWork(n: number): Array<mixed> {
-    let values = [];
-    for (const value of flushUnitsOfWork(n)) {
-      values.push(...value);
-    }
-    return values;
-  },
-
-  batchedUpdates: NoopRenderer.batchedUpdates,
-
-  deferredUpdates: NoopRenderer.deferredUpdates,
-
-  unbatchedUpdates: NoopRenderer.unbatchedUpdates,
-
-  flushSync: NoopRenderer.flushSync,
-};
-
-type TestProps = {|
-  active: boolean,
-|};
-type TestState = {|
-  counter: number,
-|};
-
-let instance = null;
-class Test extends React.Component<TestProps, TestState> {
-  state = {counter: 0};
-  increment() {
-    this.setState(({counter}) => ({
-      counter: counter + 1,
-    }));
-  }
-  render() {
-    return [this.props.active ? 'Active' : 'Inactive', this.state.counter];
-  }
-}
-const Children = props => props.children;
-Noop.render(
-  <main>
-    <div>Hello</div>
-    <Children>
-      Hello world
-      <span>
-        {'Number '}
-        {42}
-      </span>
-      <Test active={true} ref={t => (instance = t)} />
-    </Children>
-  </main>
-);
-Noop.flush();
-const actual1 = Noop.getChildren();
-const expected1 = [
-  {
-    type: 'main',
-    children: [
-      {type: 'div', children: [], prop: undefined},
-      {text: 'Hello world'},
-      {
-        type: 'span',
-        children: [{text: 'Number '}, {text: '42'}],
-        prop: undefined,
-      },
-      {text: 'Active'},
-      {text: '0'},
-    ],
-    prop: undefined,
-  },
-];
-assert.deepEqual(
-  actual1,
-  expected1,
-  'Error. Noop.getChildren() returned unexpected value.\nExpected:  ' +
-    JSON.stringify(expected1, null, 2) +
-    '\n\nActual:\n  ' +
-    JSON.stringify(actual1, null, 2)
-);
-
-if (instance === null) {
-  throw new Error('Expected instance to exist.');
-}
-
-instance.increment();
-Noop.flush();
-const actual2 = Noop.getChildren();
-const expected2 = [
-  {
-    type: 'main',
-    children: [
-      {type: 'div', children: [], prop: undefined},
-      {text: 'Hello world'},
-      {
-        type: 'span',
-        children: [{text: 'Number '}, {text: '42'}],
-        prop: undefined,
-      },
-      {text: 'Active'},
-      {text: '1'},
-    ],
-    prop: undefined,
-  },
-];
-assert.deepEqual(
-  actual2,
-  expected2,
-  'Error. Noop.getChildren() returned unexpected value.\nExpected:  ' +
-    JSON.stringify(expected2, null, 2) +
-    '\n\nActual:\n  ' +
-    JSON.stringify(actual2, null, 2)
-);
-
-const beginGreen = '\u001b[32m';
-const endGreen = '\u001b[39m';
-console.log(beginGreen + 'Reconciler package is OK!' + endGreen);
diff --git a/fixtures/reconciler/package.json b/fixtures/reconciler/package.json
deleted file mode 100644
index 15d5a904a458..000000000000
--- a/fixtures/reconciler/package.json
+++ /dev/null
@@ -1,14 +0,0 @@
-{
-  "name": "react-fixtures",
-  "version": "0.1.0",
-  "private": true,
-  "dependencies": {
-    "react": "file:../../build/packages/react",
-    "react-reconciler": "file:../../build/packages/react-reconciler"
-  },
-  "scripts": {
-    "test:dev": "../../node_modules/.bin/babel-node ./index",
-    "test:prod": "NODE_ENV=production ../../node_modules/.bin/babel-node ./index",
-    "test": "npm run test:dev && npm run test:prod"
-  }
-}
diff --git a/fixtures/reconciler/yarn.lock b/fixtures/reconciler/yarn.lock
deleted file mode 100644
index 7627e2cabdfc..000000000000
--- a/fixtures/reconciler/yarn.lock
+++ /dev/null
@@ -1,106 +0,0 @@
-# THIS IS AN AUTOGENERATED FILE. DO NOT EDIT THIS FILE DIRECTLY.
-# yarn lockfile v1
-
-
-asap@~2.0.3:
-  version "2.0.6"
-  resolved "https://registry.yarnpkg.com/asap/-/asap-2.0.6.tgz#e50347611d7e690943208bbdafebcbc2fb866d46"
-
-core-js@^1.0.0:
-  version "1.2.7"
-  resolved "https://registry.yarnpkg.com/core-js/-/core-js-1.2.7.tgz#652294c14651db28fa93bd2d5ff2983a4f08c636"
-
-encoding@^0.1.11:
-  version "0.1.12"
-  resolved "https://registry.yarnpkg.com/encoding/-/encoding-0.1.12.tgz#538b66f3ee62cd1ab51ec323829d1f9480c74beb"
-  dependencies:
-    iconv-lite "~0.4.13"
-
-fbjs@^0.8.16:
-  version "0.8.16"
-  resolved "https://registry.yarnpkg.com/fbjs/-/fbjs-0.8.16.tgz#5e67432f550dc41b572bf55847b8aca64e5337db"
-  dependencies:
-    core-js "^1.0.0"
-    isomorphic-fetch "^2.1.1"
-    loose-envify "^1.0.0"
-    object-assign "^4.1.0"
-    promise "^7.1.1"
-    setimmediate "^1.0.5"
-    ua-parser-js "^0.7.9"
-
-iconv-lite@~0.4.13:
-  version "0.4.19"
-  resolved "https://registry.yarnpkg.com/iconv-lite/-/iconv-lite-0.4.19.tgz#f7468f60135f5e5dad3399c0a81be9a1603a082b"
-
-is-stream@^1.0.1:
-  version "1.1.0"
-  resolved "https://registry.yarnpkg.com/is-stream/-/is-stream-1.1.0.tgz#12d4a3dd4e68e0b79ceb8dbc84173ae80d91ca44"
-
-isomorphic-fetch@^2.1.1:
-  version "2.2.1"
-  resolved "https://registry.yarnpkg.com/isomorphic-fetch/-/isomorphic-fetch-2.2.1.tgz#611ae1acf14f5e81f729507472819fe9733558a9"
-  dependencies:
-    node-fetch "^1.0.1"
-    whatwg-fetch ">=0.10.0"
-
-js-tokens@^3.0.0:
-  version "3.0.2"
-  resolved "https://registry.yarnpkg.com/js-tokens/-/js-tokens-3.0.2.tgz#9866df395102130e38f7f996bceb65443209c25b"
-
-loose-envify@^1.0.0, loose-envify@^1.1.0, loose-envify@^1.3.1:
-  version "1.3.1"
-  resolved "https://registry.yarnpkg.com/loose-envify/-/loose-envify-1.3.1.tgz#d1a8ad33fa9ce0e713d65fdd0ac8b748d478c848"
-  dependencies:
-    js-tokens "^3.0.0"
-
-node-fetch@^1.0.1:
-  version "1.7.3"
-  resolved "https://registry.yarnpkg.com/node-fetch/-/node-fetch-1.7.3.tgz#980f6f72d85211a5347c6b2bc18c5b84c3eb47ef"
-  dependencies:
-    encoding "^0.1.11"
-    is-stream "^1.0.1"
-
-object-assign@^4.1.0, object-assign@^4.1.1:
-  version "4.1.1"
-  resolved "https://registry.yarnpkg.com/object-assign/-/object-assign-4.1.1.tgz#2109adc7965887cfc05cbbd442cac8bfbb360863"
-
-promise@^7.1.1:
-  version "7.3.1"
-  resolved "https://registry.yarnpkg.com/promise/-/promise-7.3.1.tgz#064b72602b18f90f29192b8b1bc418ffd1ebd3bf"
-  dependencies:
-    asap "~2.0.3"
-
-prop-types@^15.6.0:
-  version "15.6.0"
-  resolved "https://registry.yarnpkg.com/prop-types/-/prop-types-15.6.0.tgz#ceaf083022fc46b4a35f69e13ef75aed0d639856"
-  dependencies:
-    fbjs "^0.8.16"
-    loose-envify "^1.3.1"
-    object-assign "^4.1.1"
-
-"react-reconciler@file:../../build/packages/react-reconciler":
-  version "0.1.0"
-  dependencies:
-    fbjs "^0.8.16"
-    loose-envify "^1.1.0"
-    object-assign "^4.1.1"
-
-"react@file:../../build/packages/react":
-  version "16.0.0"
-  dependencies:
-    fbjs "^0.8.16"
-    loose-envify "^1.1.0"
-    object-assign "^4.1.1"
-    prop-types "^15.6.0"
-
-setimmediate@^1.0.5:
-  version "1.0.5"
-  resolved "https://registry.yarnpkg.com/setimmediate/-/setimmediate-1.0.5.tgz#290cbb232e306942d7d7ea9b83732ab7856f8285"
-
-ua-parser-js@^0.7.9:
-  version "0.7.17"
-  resolved "https://registry.yarnpkg.com/ua-parser-js/-/ua-parser-js-0.7.17.tgz#e9ec5f9498b9ec910e7ae3ac626a805c4d09ecac"
-
-whatwg-fetch@>=0.10.0:
-  version "2.0.3"
-  resolved "https://registry.yarnpkg.com/whatwg-fetch/-/whatwg-fetch-2.0.3.tgz#9c84ec2dcf68187ff00bc64e1274b442176e1c84"
diff --git a/packages/react-dom/src/client/ReactDOMFB.js b/packages/react-dom/src/client/ReactDOMFB.js
index e259a7189dce..aa7c7dbf6445 100644
--- a/packages/react-dom/src/client/ReactDOMFB.js
+++ b/packages/react-dom/src/client/ReactDOMFB.js
@@ -7,7 +7,7 @@
  * @flow
  */
 
-import * as ReactFiberTreeReflection from 'shared/ReactFiberTreeReflection';
+import * as ReactFiberTreeReflection from 'react-reconciler/reflection';
 import * as ReactInstanceMap from 'shared/ReactInstanceMap';
 // TODO: direct imports like some-package/src/* are bad. Fix me.
 import * as ReactFiberErrorLogger from 'react-reconciler/src/ReactFiberErrorLogger';
diff --git a/packages/react-dom/src/events/ReactDOMEventListener.js b/packages/react-dom/src/events/ReactDOMEventListener.js
index df136f67ec3e..78c3ae43c3aa 100644
--- a/packages/react-dom/src/events/ReactDOMEventListener.js
+++ b/packages/react-dom/src/events/ReactDOMEventListener.js
@@ -6,7 +6,7 @@
  */
 
 import {batchedUpdates} from 'events/ReactGenericBatching';
-import {isFiberMounted} from 'shared/ReactFiberTreeReflection';
+import {isFiberMounted} from 'react-reconciler/reflection';
 import {HostRoot} from 'shared/ReactTypeOfWork';
 import EventListener from 'fbjs/lib/EventListener';
 
diff --git a/packages/react-dom/src/test-utils/ReactTestUtils.js b/packages/react-dom/src/test-utils/ReactTestUtils.js
index 355daad05536..8c06abf0383e 100644
--- a/packages/react-dom/src/test-utils/ReactTestUtils.js
+++ b/packages/react-dom/src/test-utils/ReactTestUtils.js
@@ -7,7 +7,7 @@
 
 import React from 'react';
 import ReactDOM from 'react-dom';
-import {findCurrentFiberUsingSlowPath} from 'shared/ReactFiberTreeReflection';
+import {findCurrentFiberUsingSlowPath} from 'react-reconciler/reflection';
 import * as ReactInstanceMap from 'shared/ReactInstanceMap';
 import {
   ClassComponent,
diff --git a/packages/react-native-renderer/src/ReactNativeFiberInspector.js b/packages/react-native-renderer/src/ReactNativeFiberInspector.js
index 0a2d890c411d..2ea72b87e2fb 100644
--- a/packages/react-native-renderer/src/ReactNativeFiberInspector.js
+++ b/packages/react-native-renderer/src/ReactNativeFiberInspector.js
@@ -12,7 +12,7 @@ import type {Fiber} from 'react-reconciler/src/ReactFiber';
 import {
   findCurrentHostFiber,
   findCurrentFiberUsingSlowPath,
-} from 'shared/ReactFiberTreeReflection';
+} from 'react-reconciler/reflection';
 import getComponentName from 'shared/getComponentName';
 import {HostComponent} from 'shared/ReactTypeOfWork';
 import emptyObject from 'fbjs/lib/emptyObject';
diff --git a/packages/react-noop-renderer/package.json b/packages/react-noop-renderer/package.json
index 355a0e6d6302..afd4aaef7151 100644
--- a/packages/react-noop-renderer/package.json
+++ b/packages/react-noop-renderer/package.json
@@ -10,7 +10,8 @@
     "fbjs": "^0.8.16",
     "object-assign": "^4.1.1",
     "prop-types": "^15.6.0",
-    "regenerator-runtime": "^0.11.0"
+    "regenerator-runtime": "^0.11.0",
+    "react-reconciler": "*"
   },
   "peerDependencies": {
     "react": "^16.0.0"
diff --git a/packages/react-noop-renderer/src/ReactNoop.js b/packages/react-noop-renderer/src/ReactNoop.js
index f7a895ff9bb1..f472da3a975d 100644
--- a/packages/react-noop-renderer/src/ReactNoop.js
+++ b/packages/react-noop-renderer/src/ReactNoop.js
@@ -17,8 +17,6 @@
 import type {Fiber} from 'react-reconciler/src/ReactFiber';
 import type {UpdateQueue} from 'react-reconciler/src/ReactFiberUpdateQueue';
 
-// TODO: direct imports like some-package/src/* are bad. Fix me.
-import ReactFiberInstrumentation from 'react-reconciler/src/ReactFiberInstrumentation';
 import ReactFiberReconciler from 'react-reconciler';
 import {enablePersistentReconciler} from 'shared/ReactFeatureFlags';
 import * as ReactInstanceMap from 'shared/ReactInstanceMap';
@@ -565,11 +563,6 @@ var ReactNoop = {
       failInBeginPhase = false;
     }
   },
-
-  __SECRET_INTERNALS_DO_NOT_USE_OR_YOU_WILL_BE_FIRED: {
-    // Private. Used only by fixtures/fiber-debugger.
-    ReactFiberInstrumentation,
-  },
 };
 
 export default ReactNoop;
diff --git a/packages/react-reconciler/npm/reflection.js b/packages/react-reconciler/npm/reflection.js
new file mode 100644
index 000000000000..a25929bd73bc
--- /dev/null
+++ b/packages/react-reconciler/npm/reflection.js
@@ -0,0 +1,7 @@
+'use strict';
+
+if (process.env.NODE_ENV === 'production') {
+  module.exports = require('./cjs/react-reconciler-reflection.production.min.js');
+} else {
+  module.exports = require('./cjs/react-reconciler-reflection.development.js');
+}
diff --git a/packages/react-reconciler/package.json b/packages/react-reconciler/package.json
index d01cacad1b16..7c129ea18772 100644
--- a/packages/react-reconciler/package.json
+++ b/packages/react-reconciler/package.json
@@ -12,6 +12,7 @@
     "LICENSE",
     "README.md",
     "index.js",
+    "reflection.js",
     "cjs/"
   ],
   "main": "index.js",
diff --git a/packages/react-reconciler/reflection.js b/packages/react-reconciler/reflection.js
new file mode 100644
index 000000000000..bd3d4a3288c2
--- /dev/null
+++ b/packages/react-reconciler/reflection.js
@@ -0,0 +1,12 @@
+/**
+ * Copyright (c) 2013-present, Facebook, Inc.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow
+ */
+
+'use strict';
+
+export * from './src/ReactFiberTreeReflection';
diff --git a/packages/react-reconciler/src/ReactFiberClassComponent.js b/packages/react-reconciler/src/ReactFiberClassComponent.js
index 68faabeccca4..f48fe0c35c47 100644
--- a/packages/react-reconciler/src/ReactFiberClassComponent.js
+++ b/packages/react-reconciler/src/ReactFiberClassComponent.js
@@ -15,7 +15,7 @@ import {
   debugRenderPhaseSideEffects,
   enableAsyncSubtreeAPI,
 } from 'shared/ReactFeatureFlags';
-import {isMounted} from 'shared/ReactFiberTreeReflection';
+import {isMounted} from 'react-reconciler/reflection';
 import * as ReactInstanceMap from 'shared/ReactInstanceMap';
 import emptyObject from 'fbjs/lib/emptyObject';
 import getComponentName from 'shared/getComponentName';
diff --git a/packages/react-reconciler/src/ReactFiberContext.js b/packages/react-reconciler/src/ReactFiberContext.js
index 231ee6da51db..70429ad791cb 100644
--- a/packages/react-reconciler/src/ReactFiberContext.js
+++ b/packages/react-reconciler/src/ReactFiberContext.js
@@ -10,7 +10,7 @@
 import type {Fiber} from './ReactFiber';
 import type {StackCursor} from './ReactFiberStack';
 
-import {isFiberMounted} from 'shared/ReactFiberTreeReflection';
+import {isFiberMounted} from 'react-reconciler/reflection';
 import {ClassComponent, HostRoot} from 'shared/ReactTypeOfWork';
 import getComponentName from 'shared/getComponentName';
 import emptyObject from 'fbjs/lib/emptyObject';
diff --git a/packages/react-reconciler/src/ReactFiberReconciler.js b/packages/react-reconciler/src/ReactFiberReconciler.js
index c09cf9cf6534..67894f0f9578 100644
--- a/packages/react-reconciler/src/ReactFiberReconciler.js
+++ b/packages/react-reconciler/src/ReactFiberReconciler.js
@@ -15,7 +15,7 @@ import {enableAsyncSubtreeAPI} from 'shared/ReactFeatureFlags';
 import {
   findCurrentHostFiber,
   findCurrentHostFiberWithNoPortals,
-} from 'shared/ReactFiberTreeReflection';
+} from 'react-reconciler/reflection';
 import * as ReactInstanceMap from 'shared/ReactInstanceMap';
 import {HostComponent} from 'shared/ReactTypeOfWork';
 import emptyObject from 'fbjs/lib/emptyObject';
diff --git a/packages/shared/ReactFiberTreeReflection.js b/packages/react-reconciler/src/ReactFiberTreeReflection.js
similarity index 96%
rename from packages/shared/ReactFiberTreeReflection.js
rename to packages/react-reconciler/src/ReactFiberTreeReflection.js
index 9bb670db300f..e25d065d2710 100644
--- a/packages/shared/ReactFiberTreeReflection.js
+++ b/packages/react-reconciler/src/ReactFiberTreeReflection.js
@@ -12,17 +12,17 @@ import type {Fiber} from 'react-reconciler/src/ReactFiber';
 import invariant from 'fbjs/lib/invariant';
 import warning from 'fbjs/lib/warning';
 
-import * as ReactInstanceMap from './ReactInstanceMap';
-import {ReactCurrentOwner} from './ReactGlobalSharedState';
-import getComponentName from './getComponentName';
+import * as ReactInstanceMap from 'shared/ReactInstanceMap';
+import {ReactCurrentOwner} from 'shared/ReactGlobalSharedState';
+import getComponentName from 'shared/getComponentName';
 import {
   ClassComponent,
   HostComponent,
   HostRoot,
   HostPortal,
   HostText,
-} from './ReactTypeOfWork';
-import {NoEffect, Placement} from './ReactTypeOfSideEffect';
+} from 'shared/ReactTypeOfWork';
+import {NoEffect, Placement} from 'shared/ReactTypeOfSideEffect';
 
 var MOUNTING = 1;
 var MOUNTED = 2;
diff --git a/packages/react-rt-renderer/src/ReactNativeRTFiberInspector.js b/packages/react-rt-renderer/src/ReactNativeRTFiberInspector.js
index ba2613bdf86b..07df3162b339 100644
--- a/packages/react-rt-renderer/src/ReactNativeRTFiberInspector.js
+++ b/packages/react-rt-renderer/src/ReactNativeRTFiberInspector.js
@@ -10,7 +10,7 @@
 import {
   findCurrentFiberUsingSlowPath,
   findCurrentHostFiber,
-} from 'shared/ReactFiberTreeReflection';
+} from 'react-reconciler/reflection';
 import getComponentName from 'shared/getComponentName';
 import {HostComponent} from 'shared/ReactTypeOfWork';
 import emptyObject from 'fbjs/lib/emptyObject';
diff --git a/packages/react-test-renderer/src/ReactTestRenderer.js b/packages/react-test-renderer/src/ReactTestRenderer.js
index e3d1a6955650..c68516d31d51 100644
--- a/packages/react-test-renderer/src/ReactTestRenderer.js
+++ b/packages/react-test-renderer/src/ReactTestRenderer.js
@@ -12,7 +12,7 @@ import type {FiberRoot} from 'react-reconciler/src/ReactFiberRoot';
 
 import ReactFiberReconciler from 'react-reconciler';
 import {batchedUpdates} from 'events/ReactGenericBatching';
-import {findCurrentFiberUsingSlowPath} from 'shared/ReactFiberTreeReflection';
+import {findCurrentFiberUsingSlowPath} from 'react-reconciler/reflection';
 import emptyObject from 'fbjs/lib/emptyObject';
 import {
   Fragment,
diff --git a/scripts/circleci/build.sh b/scripts/circleci/build.sh
index 779931cddf80..5281af30e6fb 100755
--- a/scripts/circleci/build.sh
+++ b/scripts/circleci/build.sh
@@ -10,8 +10,3 @@ yarn build --extract-errors
 
 # Do a sanity check on bundles
 yarn lint-build
-
-# Check that the standalone reconciler isn't borked
-cd fixtures/reconciler
-yarn
-yarn test
diff --git a/scripts/rollup/bundles.js b/scripts/rollup/bundles.js
index 79ca65112610..abab79daafc1 100644
--- a/scripts/rollup/bundles.js
+++ b/scripts/rollup/bundles.js
@@ -211,6 +211,16 @@ const bundles = [
     externals: ['react'],
   },
 
+  /******* Reflection *******/
+  {
+    label: 'reconciler-reflection',
+    moduleType: RENDERER_UTILS,
+    bundleTypes: [NODE_DEV, NODE_PROD],
+    entry: 'react-reconciler/reflection',
+    global: 'ReactFiberTreeReflection',
+    externals: [],
+  },
+
   /******* React Call Return (experimental) *******/
   {
     label: 'react-call-return',
diff --git a/scripts/rollup/results.json b/scripts/rollup/results.json
index 37741731c68c..66d87a0b9b23 100644
--- a/scripts/rollup/results.json
+++ b/scripts/rollup/results.json
@@ -189,8 +189,8 @@
       "gzip": 2725
     },
     "react-noop-renderer.development.js (NODE_DEV)": {
-      "size": 277788,
-      "gzip": 58527
+      "size": 17474,
+      "gzip": 4855
     },
     "react-reconciler.development.js (NODE_DEV)": {
       "size": 262177,
@@ -217,8 +217,16 @@
       "gzip": 3917
     },
     "react-noop-renderer.production.min.js (NODE_PROD)": {
-      "size": 45144,
-      "gzip": 14079
+      "size": 6011,
+      "gzip": 2418
+    },
+    "react-reconciler-reflection.development.js (NODE_DEV)": {
+      "size": 10398,
+      "gzip": 3198
+    },
+    "react-reconciler-reflection.production.min.js (NODE_PROD)": {
+      "size": 2408,
+      "gzip": 1062
     }
   }
 }
\ No newline at end of file