Remove default polyfills from metro-bundler

Reviewed By: davidaurelio

Differential Revision: D5406562

fbshipit-source-id: 76a8850ab8e987407421084054d1d0eb23ff645d

packages/metro-bundler/src/Bundler/index.js

@@ -125,6 +125,7 @@ type Options = {|
   +blacklistRE?: RegExp,
   +cacheVersion: string,
   +extraNodeModules: {},
+  +getPolyfills: ({platform: ?string}) => $ReadOnlyArray<string>,
   +getTransformOptions?: GetTransformOptions,
   +globalTransformCache: ?GlobalTransformCache,
   +hasteImpl?: HasteImpl,
@@ -213,6 +214,7 @@ class Bundler {
       assetExts: opts.assetExts,
       blacklistRE: opts.blacklistRE,
       extraNodeModules: opts.extraNodeModules,
+      getPolyfills: opts.getPolyfills,
       getTransformCacheKey,
       globalTransformCache: opts.globalTransformCache,
       hasteImpl: opts.hasteImpl,

packages/metro-bundler/src/ModuleGraph/ModuleGraph.js

@@ -32,6 +32,7 @@ type BuildFn = (
 ) => void;
 
 type BuildOptions = {|
+  getPolyfills: ({platform: ?string}) => $ReadOnlyArray<string>,
   optimize: boolean,
   platform: string,
 |};
@@ -43,6 +44,7 @@ exports.createBuildSetup = (
 ): BuildFn =>
   (entryPoints, options, callback) => {
     const {
+      getPolyfills = (({platform}) => []),
       optimize = false,
       platform = defaults.platforms[0],
     } = options;
@@ -68,7 +70,7 @@ exports.createBuildSetup = (
         cb,
       ),
       polyfills: cb => graphOnlyModules(
-        defaults.polyfills.map(translateDefaultsPath),
+        getPolyfills({platform}).map(translateDefaultsPath),
         cb,
       ),
     }, (
@@ -80,7 +82,6 @@ exports.createBuildSetup = (
         return;
       }
 
-
       const {
         graph: {modules, entryModules},
         moduleSystem,

packages/metro-bundler/src/ModuleGraph/__tests__/ModuleGraph-test.js

@@ -17,6 +17,7 @@ describe('build setup', () => {
   const buildSetup = ModuleGraph.createBuildSetup(graph, mds => {
     return [...mds].sort((l, r) => l.file.path > r.file.path);
   });
+  const polyfillOptions = {getPolyfills: () => ['polyfill-a', 'polyfill-b']};
   const noOptions = {};
   const noEntryPoints = [];
 
@@ -65,10 +66,10 @@ describe('build setup', () => {
   });
 
   it('places polyfills after the module system', done => {
-    buildSetup(noEntryPoints, noOptions, (error, result) => {
+    buildSetup(noEntryPoints, polyfillOptions, (error, result) => {
-      const polyfills =
+      const list = polyfillOptions.getPolyfills();
-        Array.from(result.modules).slice(2, 2 + defaults.polyfills.length);
+      const polyfills = Array.from(result.modules).slice(2, list.length + 2);
-      expect(polyfills).toEqual(defaults.polyfills.map(moduleFromPath));
+      expect(polyfills).toEqual(list.map(moduleFromPath));
       done();
     });
   });

packages/metro-bundler/src/Resolver/__tests__/Resolver-test.js

@@ -123,150 +123,15 @@ describe('Resolver', function() {
       });
     });
 
-    it('should get dependencies with polyfills', function() {
-      expect.assertions(5);
-
-      var module = createModule('index');
-      var deps = [module];
-
-      var depResolverPromise = Resolver.load({
-        projectRoot: '/root',
-      });
-
-      DependencyGraph.prototype.getDependencies.mockImplementation(function() {
-        return Promise.resolve(new ResolutionResponseMock({
-          dependencies: deps,
-          mainModuleId: 'index',
-        }));
-      });
-
-      const polyfill = {
-        id: 'polyfills/Object.es6.js',
-        file: 'polyfills/Object.es6.js',
-        dependencies: [],
-      };
-      DependencyGraph.prototype.createPolyfill.mockReturnValueOnce(polyfill);
-
-      return depResolverPromise
-        .then(r => r.getDependencies(
-          '/root/index.js',
-          {dev: false},
-          undefined,
-          undefined,
-          createGetModuleId()
-        )).then(function(result) {
-          expect(result.mainModuleId).toEqual('index');
-          expect(result.dependencies[result.dependencies.length - 1]).toBe(module);
-
-          expect(DependencyGraph.mock.instances[0].getDependencies)
-              .toBeCalledWith({entryPath: '/root/index.js', recursive: true});
-          expect(result.dependencies[0]).toEqual(polyfill);
-
-          expect(
-            DependencyGraph
-              .prototype
-              .createPolyfill
-              .mock
-              .calls
-              .map(call => call[0]))
-          .toEqual([
-            {id: 'polyfills/Object.es6.js',
-              file: 'polyfills/Object.es6.js',
-              dependencies: [],
-            },
-            {id: 'polyfills/console.js',
-              file: 'polyfills/console.js',
-              dependencies: [
-                'polyfills/Object.es6.js',
-              ],
-            },
-            {id: 'polyfills/error-guard.js',
-              file: 'polyfills/error-guard.js',
-              dependencies: [
-                'polyfills/Object.es6.js',
-                'polyfills/console.js',
-              ],
-            },
-            {id: 'polyfills/Number.es6.js',
-              file: 'polyfills/Number.es6.js',
-              dependencies: [
-                'polyfills/Object.es6.js',
-                'polyfills/console.js',
-                'polyfills/error-guard.js',
-              ],
-            },
-            {id: 'polyfills/String.prototype.es6.js',
-              file: 'polyfills/String.prototype.es6.js',
-              dependencies: [
-                'polyfills/Object.es6.js',
-                'polyfills/console.js',
-                'polyfills/error-guard.js',
-                'polyfills/Number.es6.js',
-              ],
-            },
-            {id: 'polyfills/Array.prototype.es6.js',
-              file: 'polyfills/Array.prototype.es6.js',
-              dependencies: [
-                'polyfills/Object.es6.js',
-                'polyfills/console.js',
-                'polyfills/error-guard.js',
-                'polyfills/Number.es6.js',
-                'polyfills/String.prototype.es6.js',
-              ],
-            },
-            {id: 'polyfills/Array.es6.js',
-              file: 'polyfills/Array.es6.js',
-              dependencies: [
-                'polyfills/Object.es6.js',
-                'polyfills/console.js',
-                'polyfills/error-guard.js',
-                'polyfills/Number.es6.js',
-                'polyfills/String.prototype.es6.js',
-                'polyfills/Array.prototype.es6.js',
-              ],
-            },
-            {id: 'polyfills/Object.es7.js',
-              file: 'polyfills/Object.es7.js',
-              dependencies: [
-                'polyfills/Object.es6.js',
-                'polyfills/console.js',
-                'polyfills/error-guard.js',
-                'polyfills/Number.es6.js',
-                'polyfills/String.prototype.es6.js',
-                'polyfills/Array.prototype.es6.js',
-                'polyfills/Array.es6.js',
-              ],
-            },
-            {id: 'polyfills/babelHelpers.js',
-              file: 'polyfills/babelHelpers.js',
-              dependencies: [
-                'polyfills/Object.es6.js',
-                'polyfills/console.js',
-                'polyfills/error-guard.js',
-                'polyfills/Number.es6.js',
-                'polyfills/String.prototype.es6.js',
-                'polyfills/Array.prototype.es6.js',
-                'polyfills/Array.es6.js',
-                'polyfills/Object.es7.js',
-              ],
-            },
-          ].map(({id, file, dependencies}) => ({
-            id: pathJoin(__dirname, '..', id),
-            file: pathJoin(__dirname, '..', file),
-            dependencies: dependencies.map(d => pathJoin(__dirname, '..', d)),
-          })));
-        });
-    });
-
     it('should pass in more polyfills', function() {
-      expect.assertions(2);
+      expect.assertions(3);
 
       var module = createModule('index');
       var deps = [module];
 
       var depResolverPromise = Resolver.load({
+        getPolyfills: () => ['custom-polyfill-1', 'custom-polyfill-2'],
         projectRoot: '/root',
-        polyfillModuleNames: ['some module'],
       });
 
       DependencyGraph.prototype.getDependencies.mockImplementation(function() {
@@ -285,24 +150,21 @@ describe('Resolver', function() {
           createGetModuleId()
         )).then(result => {
           expect(result.mainModuleId).toEqual('index');
-          const calls =
+          const calls = DependencyGraph.prototype.createPolyfill.mock.calls;
-            DependencyGraph.prototype.createPolyfill.mock.calls[result.dependencies.length - 2];
+          const callPolyfill1 = calls[result.dependencies.length - 3];
-          expect(calls).toEqual([
+          const callPolyfill2 = calls[result.dependencies.length - 2];
-            {file: 'some module',
+
-              id: 'some module',
+          expect(callPolyfill1).toEqual([{
-              dependencies: [
+            file: 'custom-polyfill-1',
-                'polyfills/Object.es6.js',
+            id: 'custom-polyfill-1',
-                'polyfills/console.js',
+            dependencies: [],
-                'polyfills/error-guard.js',
+          }]);
-                'polyfills/Number.es6.js',
+
-                'polyfills/String.prototype.es6.js',
+          expect(callPolyfill2).toEqual([{
-                'polyfills/Array.prototype.es6.js',
+            file: 'custom-polyfill-2',
-                'polyfills/Array.es6.js',
+            id: 'custom-polyfill-2',
-                'polyfills/Object.es7.js',
+            dependencies: ['custom-polyfill-1'],
-                'polyfills/babelHelpers.js',
+          }]);
-              ].map(d => pathJoin(__dirname, '..', d)),
-            },
-          ]);
         });
     });
   });

packages/metro-bundler/src/Resolver/index.js

@@ -34,6 +34,7 @@ type Options = {|
   +assetExts: Array<string>,
   +blacklistRE?: RegExp,
   +extraNodeModules: ?{},
+  +getPolyfills: ({platform: ?string}) => $ReadOnlyArray<string>,
   +getTransformCacheKey: GetTransformCacheKey,
   +globalTransformCache: ?GlobalTransformCache,
   +hasteImpl?: HasteImpl,
@@ -55,11 +56,13 @@ type Options = {|
 class Resolver {
 
   _depGraph: DependencyGraph;
+  _getPolyfills: ({platform: ?string}) => $ReadOnlyArray<string>;
   _minifyCode: MinifyCode;
   _postMinifyProcess: PostMinifyProcess;
   _polyfillModuleNames: Array<string>;
 
   constructor(opts: Options, depGraph: DependencyGraph) {
+    this._getPolyfills = opts.getPolyfills;
     this._minifyCode = opts.minifyCode;
     this._postMinifyProcess = opts.postMinifyProcess;
     this._polyfillModuleNames = opts.polyfillModuleNames || [];
@@ -113,7 +116,7 @@ class Resolver {
       recursive,
       onProgress,
     }).then(resolutionResponse => {
-      this._getPolyfillDependencies().reverse().forEach(
+      this._getPolyfillDependencies(platform).reverse().forEach(
         polyfill => resolutionResponse.prependDependency(polyfill)
       );
 
@@ -141,8 +144,9 @@ class Resolver {
     }));
   }
 
-  _getPolyfillDependencies(): Array<Module> {
+  _getPolyfillDependencies(platform: ?string): Array<Module> {
-    const polyfillModuleNames = defaults.polyfills.concat(this._polyfillModuleNames);
+    const polyfillModuleNames = this._getPolyfills({platform})
+      .concat(this._polyfillModuleNames);
 
     return polyfillModuleNames.map(
       (polyfillModuleName, idx) => this._depGraph.createPolyfill({

packages/metro-bundler/src/Resolver/polyfills/Array.es6.js

@@ -1,86 +0,0 @@
-/**
- * Copyright (c) 2013-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.
- *
- * @polyfill
- */
-
-/* eslint-disable */
-
-/**
- * Creates an array from array like objects.
- *
- * https://people.mozilla.org/~jorendorff/es6-draft.html#sec-array.from
- */
-if (!Array.from) {
-  Array.from = function(arrayLike /*, mapFn, thisArg */) {
-    if (arrayLike == null) {
-      throw new TypeError('Object is null or undefined');
-    }
-
-    // Optional args.
-    var mapFn = arguments[1];
-    var thisArg = arguments[2];
-
-    var C = this;
-    var items = Object(arrayLike);
-    var symbolIterator = typeof Symbol === 'function'
-      ? Symbol.iterator
-      : '@@iterator';
-    var mapping = typeof mapFn === 'function';
-    var usingIterator = typeof items[symbolIterator] === 'function';
-    var key = 0;
-    var ret;
-    var value;
-
-    if (usingIterator) {
-      ret = typeof C === 'function'
-        ? new C()
-        : [];
-      var it = items[symbolIterator]();
-      var next;
-
-      while (!(next = it.next()).done) {
-        value = next.value;
-
-        if (mapping) {
-          value = mapFn.call(thisArg, value, key);
-        }
-
-        ret[key] = value;
-        key += 1;
-      }
-
-      ret.length = key;
-      return ret;
-    }
-
-    var len = items.length;
-    if (isNaN(len) || len < 0) {
-      len = 0;
-    }
-
-    ret = typeof C === 'function'
-      ? new C(len)
-      : new Array(len);
-
-    while (key < len) {
-      value = items[key];
-
-      if (mapping) {
-        value = mapFn.call(thisArg, value, key);
-      }
-
-      ret[key] = value;
-
-      key += 1;
-    }
-
-    ret.length = key;
-    return ret;
-  };
-}

packages/metro-bundler/src/Resolver/polyfills/Array.prototype.es6.js

@@ -1,95 +0,0 @@
-/**
- * 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.
- *
- * @polyfill
- */
-
-/* eslint-disable */
-
-// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/findIndex
-function findIndex(predicate, context) {
-  if (this == null) {
-    throw new TypeError(
-      'Array.prototype.findIndex called on null or undefined'
-    );
-  }
-  if (typeof predicate !== 'function') {
-    throw new TypeError('predicate must be a function');
-  }
-  var list = Object(this);
-  var length = list.length >>> 0;
-  for (var i = 0; i < length; i++) {
-    if (predicate.call(context, list[i], i, list)) {
-      return i;
-    }
-  }
-  return -1;
-}
-
-if (!Array.prototype.findIndex) {
-  Object.defineProperty(Array.prototype, 'findIndex', {
-    enumerable: false,
-    writable: true,
-    configurable: true,
-    value: findIndex
-  });
-}
-
-// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/find
-if (!Array.prototype.find) {
-  Object.defineProperty(Array.prototype, 'find', {
-    enumerable: false,
-    writable: true,
-    configurable: true,
-    value: function(predicate, context) {
-      if (this == null) {
-        throw new TypeError(
-          'Array.prototype.find called on null or undefined'
-        );
-      }
-      var index = findIndex.call(this, predicate, context);
-      return index === -1 ? undefined : this[index];
-    }
-  });
-}
-
-// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/includes
-if (!Array.prototype.includes) {
-  Object.defineProperty(Array.prototype, 'includes', {
-    enumerable: false,
-    writable: true,
-    configurable: true,
-    value: function (searchElement) {
-      var O = Object(this);
-      var len = parseInt(O.length) || 0;
-      if (len === 0) {
-        return false;
-      }
-      var n = parseInt(arguments[1]) || 0;
-      var k;
-      if (n >= 0) {
-        k = n;
-      } else {
-        k = len + n;
-        if (k < 0) {
-          k = 0;
-        }
-      }
-      var currentElement;
-      while (k < len) {
-        currentElement = O[k];
-        if (searchElement === currentElement ||
-          (searchElement !== searchElement && currentElement !== currentElement)) {
-          return true;
-        }
-        k++;
-      }
-      return false;
-    }
-  });
-}

packages/metro-bundler/src/Resolver/polyfills/Number.es6.js

@@ -1,41 +0,0 @@
-/**
- * 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.
- *
- * @polyfill
- */
-
-/* eslint-disable strict */
-
-if (Number.EPSILON === undefined) {
-  Object.defineProperty(Number, 'EPSILON', {
-    value: Math.pow(2, -52),
-  });
-}
-if (Number.MAX_SAFE_INTEGER === undefined) {
-  Object.defineProperty(Number, 'MAX_SAFE_INTEGER', {
-    value: Math.pow(2, 53) - 1,
-  });
-}
-if (Number.MIN_SAFE_INTEGER === undefined) {
-  Object.defineProperty(Number, 'MIN_SAFE_INTEGER', {
-    value: -(Math.pow(2, 53) - 1),
-  });
-}
-if (!Number.isNaN) {
-  // eslint-disable-next-line max-len
-  // https://github.com/dherman/tc39-codex-wiki/blob/master/data/es6/number/index.md#polyfill-for-numberisnan
-  const globalIsNaN = global.isNaN;
-  Object.defineProperty(Number, 'isNaN', {
-    configurable: true,
-    enumerable: false,
-    value: function isNaN(value) {
-      return typeof value === 'number' && globalIsNaN(value);
-    },
-    writable: true,
-  });
-}

packages/metro-bundler/src/Resolver/polyfills/Object.es6.js

@@ -1,68 +0,0 @@
-/**
- * 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.
- *
- * @polyfill
- */
-
-/* eslint-disable strict */
-
-// WARNING: This is an optimized version that fails on hasOwnProperty checks
-// and non objects. It's not spec-compliant. It's a perf optimization.
-// This is only needed for iOS 8 and current Android JSC.
-
-Object.assign = function(target, sources) {
-  if (__DEV__) {
-    if (target == null) {
-      throw new TypeError('Object.assign target cannot be null or undefined');
-    }
-    if (typeof target !== 'object' && typeof target !== 'function') {
-      throw new TypeError(
-        'In this environment the target of assign MUST be an object.' +
-        'This error is a performance optimization and not spec compliant.'
-      );
-    }
-  }
-
-  for (var nextIndex = 1; nextIndex < arguments.length; nextIndex++) {
-    var nextSource = arguments[nextIndex];
-    if (nextSource == null) {
-      continue;
-    }
-
-    if (__DEV__) {
-      if (typeof nextSource !== 'object' &&
-          typeof nextSource !== 'function') {
-        throw new TypeError(
-          'In this environment the sources for assign MUST be an object.' +
-          'This error is a performance optimization and not spec compliant.'
-        );
-      }
-    }
-
-    // We don't currently support accessors nor proxies. Therefore this
-    // copy cannot throw. If we ever supported this then we must handle
-    // exceptions and side-effects.
-
-    for (var key in nextSource) {
-      if (__DEV__) {
-        var hasOwnProperty = Object.prototype.hasOwnProperty;
-        if (!hasOwnProperty.call(nextSource, key)) {
-          throw new TypeError(
-            'One of the sources for assign has an enumerable key on the ' +
-            'prototype chain. Are you trying to assign a prototype property? ' +
-            'We don\'t allow it, as this is an edge case that we do not support. ' +
-            'This error is a performance optimization and not spec compliant.'
-          );
-        }
-      }
-      target[key] = nextSource[key];
-    }
-  }
-
-  return target;
-};

packages/metro-bundler/src/Resolver/polyfills/Object.es7.js

@@ -1,59 +0,0 @@
-/**
- * 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.
- *
- * @polyfill
- */
-
-(function() {
-  'use strict';
-
-  const hasOwnProperty = Object.prototype.hasOwnProperty;
-
-  /**
-   * Returns an array of the given object's own enumerable entries.
-   * https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/entries
-   */
-  if (typeof Object.entries !== 'function') {
-    Object.entries = function(object) {
-      // `null` and `undefined` values are not allowed.
-      if (object == null) {
-        throw new TypeError('Object.entries called on non-object');
-      }
-
-      const entries = [];
-      for (const key in object) {
-        if (hasOwnProperty.call(object, key)) {
-          entries.push([key, object[key]]);
-        }
-      }
-      return entries;
-    };
-  }
-
-  /**
-   * Returns an array of the given object's own enumerable entries.
-   * https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/values
-   */
-  if (typeof Object.values !== 'function') {
-    Object.values = function(object) {
-      // `null` and `undefined` values are not allowed.
-      if (object == null) {
-        throw new TypeError('Object.values called on non-object');
-      }
-
-      const values = [];
-      for (const key in object) {
-        if (hasOwnProperty.call(object, key)) {
-          values.push(object[key]);
-        }
-      }
-      return values;
-    };
-  }
-
-})();

packages/metro-bundler/src/Resolver/polyfills/String.prototype.es6.js

@@ -1,92 +0,0 @@
-/**
- * Copyright (c) 2013-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.
- *
- * @polyfill
- */
-
-/* eslint-disable strict, no-extend-native, no-bitwise */
-
-/*
- * NOTE: We use (Number(x) || 0) to replace NaN values with zero.
- */
-
-if (!String.prototype.startsWith) {
-  String.prototype.startsWith = function(search) {
-    'use strict';
-    if (this == null) {
-      throw TypeError();
-    }
-    var string = String(this);
-    var pos = arguments.length > 1 ?
-      (Number(arguments[1]) || 0) : 0;
-    var start = Math.min(Math.max(pos, 0), string.length);
-    return string.indexOf(String(search), pos) === start;
-  };
-}
-
-if (!String.prototype.endsWith) {
-  String.prototype.endsWith = function(search) {
-    'use strict';
-    if (this == null) {
-      throw TypeError();
-    }
-    var string = String(this);
-    var stringLength = string.length;
-    var searchString = String(search);
-    var pos = arguments.length > 1 ?
-      (Number(arguments[1]) || 0) : stringLength;
-    var end = Math.min(Math.max(pos, 0), stringLength);
-    var start = end - searchString.length;
-    if (start < 0) {
-      return false;
-    }
-    return string.lastIndexOf(searchString, start) === start;
-  };
-}
-
-if (!String.prototype.repeat) {
-  String.prototype.repeat = function(count) {
-    'use strict';
-    if (this == null) {
-      throw TypeError();
-    }
-    var string = String(this);
-    count = Number(count) || 0;
-    if (count < 0 || count === Infinity) {
-      throw RangeError();
-    }
-    if (count === 1) {
-      return string;
-    }
-    var result = '';
-    while (count) {
-      if (count & 1) {
-        result += string;
-      }
-      if ((count >>= 1)) {
-        string += string;
-      }
-    }
-    return result;
-  };
-}
-
-if (!String.prototype.includes) {
-  String.prototype.includes = function(search, start) {
-    'use strict';
-    if (typeof start !== 'number') {
-      start = 0;
-    }
-
-    if (start + search.length > this.length) {
-      return false;
-    } else {
-      return this.indexOf(search, start) !== -1;
-    }
-  };
-}

packages/metro-bundler/src/Resolver/polyfills/__tests__/Object.es7-test.js

@@ -1,125 +0,0 @@
-/**
- * Copyright (c) 2013-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.
- *
- * @emails oncall+jsinfra
- */
-
-/* eslint-disable fb-www/object-create-only-one-param */
-
-'use strict';
-
-describe('Object (ES7)', () => {
-  beforeEach(() => {
-    delete Object.entries;
-    delete Object.values;
-    jest.resetModules();
-    require('../Object.es7');
-  });
-
-  describe('Object.entries', () => {
-    it('should have a length of 1', () => {
-      expect(Object.entries.length).toBe(1);
-    });
-
-    it('should check for type', () => {
-      expect(Object.entries.bind(null, null)).toThrow(TypeError(
-        'Object.entries called on non-object'
-      ));
-      expect(Object.entries.bind(null, undefined)).toThrow(TypeError(
-        'Object.entries called on non-object'
-      ));
-      expect(Object.entries.bind(null, [])).not.toThrow();
-      expect(Object.entries.bind(null, () => {})).not.toThrow();
-      expect(Object.entries.bind(null, {})).not.toThrow();
-      expect(Object.entries.bind(null, 'abc')).not.toThrow();
-    });
-
-    it('should return enumerable entries', () => {
-      const foo = Object.defineProperties({}, {
-        x: {value: 10, enumerable: true},
-        y: {value: 20},
-      });
-
-      expect(Object.entries(foo)).toEqual([['x', 10]]);
-
-      const bar = {x: 10, y: 20};
-      expect(Object.entries(bar)).toEqual([['x', 10], ['y', 20]]);
-    });
-
-    it('should work with proto-less objects', () => {
-      const foo = Object.create(null, {
-        x: {value: 10, enumerable: true},
-        y: {value: 20},
-      });
-
-      expect(Object.entries(foo)).toEqual([['x', 10]]);
-    });
-
-    it('should return only own entries', () => {
-      const foo = Object.create({z: 30}, {
-        x: {value: 10, enumerable: true},
-        y: {value: 20},
-      });
-
-      expect(Object.entries(foo)).toEqual([['x', 10]]);
-    });
-
-    it('should convert to object primitive string', () => {
-      expect(Object.entries('ab')).toEqual([['0', 'a'], ['1', 'b']]);
-    });
-  });
-
-  describe('Object.values', () => {
-    it('should have a length of 1', () => {
-      expect(Object.values.length).toBe(1);
-    });
-
-    it('should check for type', () => {
-      expect(Object.values.bind(null, null)).toThrow(TypeError(
-        'Object.values called on non-object'
-      ));
-      expect(Object.values.bind(null, [])).not.toThrow();
-      expect(Object.values.bind(null, () => {})).not.toThrow();
-      expect(Object.values.bind(null, {})).not.toThrow();
-    });
-
-    it('should return enumerable values', () => {
-      const foo = Object.defineProperties({}, {
-        x: {value: 10, enumerable: true},
-        y: {value: 20},
-      });
-
-      expect(Object.values(foo)).toEqual([10]);
-
-      const bar = {x: 10, y: 20};
-      expect(Object.values(bar)).toEqual([10, 20]);
-    });
-
-    it('should work with proto-less objects', () => {
-      const foo = Object.create(null, {
-        x: {value: 10, enumerable: true},
-        y: {value: 20},
-      });
-
-      expect(Object.values(foo)).toEqual([10]);
-    });
-
-    it('should return only own values', () => {
-      const foo = Object.create({z: 30}, {
-        x: {value: 10, enumerable: true},
-        y: {value: 20},
-      });
-
-      expect(Object.values(foo)).toEqual([10]);
-    });
-
-    it('should convert to object primitive string', () => {
-      expect(Object.values('ab')).toEqual(['a', 'b']);
-    });
-  });
-});

packages/metro-bundler/src/Resolver/polyfills/babelHelpers.js

@@ -1,247 +0,0 @@
-/**
- * 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.
- *
- * @polyfill
- */
-
-/* eslint-disable */
-
-// Created by running:
-// require('babel-core').buildExternalHelpers('_extends classCallCheck createClass createRawReactElement defineProperty get inherits  interopRequireDefault interopRequireWildcard objectWithoutProperties possibleConstructorReturn slicedToArray taggedTemplateLiteral toArray toConsumableArray '.split(' '))
-// then replacing the `global` reference in the last line to also use `this`.
-//
-// actually, that's a lie, because babel6 omits _extends and createRawReactElement
-
-var babelHelpers = global.babelHelpers = {};
-
-babelHelpers.typeof = typeof Symbol === "function" && typeof Symbol.iterator === "symbol" ? function (obj) {
-  return typeof obj;
-} : function (obj) {
-  return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj;
-};
-
-babelHelpers.createRawReactElement = (function () {
-  var REACT_ELEMENT_TYPE = typeof Symbol === "function" && Symbol.for && Symbol.for("react.element") || 0xeac7;
-  return function createRawReactElement(type, key, props) {
-    return {
-      $$typeof: REACT_ELEMENT_TYPE,
-      type: type,
-      key: key,
-      ref: null,
-      props: props,
-      _owner: null
-    };
-  };
-})();
-
-babelHelpers.classCallCheck = function (instance, Constructor) {
-  if (!(instance instanceof Constructor)) {
-    throw new TypeError("Cannot call a class as a function");
-  }
-};
-
-babelHelpers.createClass = (function () {
-  function defineProperties(target, props) {
-    for (var i = 0; i < props.length; i++) {
-      var descriptor = props[i];
-      descriptor.enumerable = descriptor.enumerable || false;
-      descriptor.configurable = true;
-      if ("value" in descriptor) descriptor.writable = true;
-      Object.defineProperty(target, descriptor.key, descriptor);
-    }
-  }
-
-  return function (Constructor, protoProps, staticProps) {
-    if (protoProps) defineProperties(Constructor.prototype, protoProps);
-    if (staticProps) defineProperties(Constructor, staticProps);
-    return Constructor;
-  };
-})();
-
-babelHelpers.defineEnumerableProperties = function(obj, descs) {
-  for (var key in descs) {
-    var desc = descs[key];
-    desc.configurable = (desc.enumerable = true);
-    if ('value' in desc) desc.writable = true;
-    Object.defineProperty(obj, key, desc);
-  }
-  return obj;
-};
-
-babelHelpers.defineProperty = function (obj, key, value) {
-  if (key in obj) {
-    Object.defineProperty(obj, key, {
-      value: value,
-      enumerable: true,
-      configurable: true,
-      writable: true
-    });
-  } else {
-    obj[key] = value;
-  }
-
-  return obj;
-};
-
-babelHelpers._extends = babelHelpers.extends = Object.assign || function (target) {
-  for (var i = 1; i < arguments.length; i++) {
-    var source = arguments[i];
-
-    for (var key in source) {
-      if (Object.prototype.hasOwnProperty.call(source, key)) {
-        target[key] = source[key];
-      }
-    }
-  }
-
-  return target;
-};
-
-babelHelpers.get = function get(object, property, receiver) {
-  if (object === null) object = Function.prototype;
-  var desc = Object.getOwnPropertyDescriptor(object, property);
-
-  if (desc === undefined) {
-    var parent = Object.getPrototypeOf(object);
-
-    if (parent === null) {
-      return undefined;
-    } else {
-      return get(parent, property, receiver);
-    }
-  } else if ("value" in desc) {
-    return desc.value;
-  } else {
-    var getter = desc.get;
-
-    if (getter === undefined) {
-      return undefined;
-    }
-
-    return getter.call(receiver);
-  }
-};
-
-babelHelpers.inherits = function (subClass, superClass) {
-  if (typeof superClass !== "function" && superClass !== null) {
-    throw new TypeError("Super expression must either be null or a function, not " + typeof superClass);
-  }
-
-  subClass.prototype = Object.create(superClass && superClass.prototype, {
-    constructor: {
-      value: subClass,
-      enumerable: false,
-      writable: true,
-      configurable: true
-    }
-  });
-  if (superClass) Object.setPrototypeOf ? Object.setPrototypeOf(subClass, superClass) : subClass.__proto__ = superClass;
-};
-
-babelHelpers.interopRequireDefault = function (obj) {
-  return obj && obj.__esModule ? obj : {
-    default: obj
-  };
-};
-
-babelHelpers.interopRequireWildcard = function (obj) {
-  if (obj && obj.__esModule) {
-    return obj;
-  } else {
-    var newObj = {};
-
-    if (obj != null) {
-      for (var key in obj) {
-        if (Object.prototype.hasOwnProperty.call(obj, key)) newObj[key] = obj[key];
-      }
-    }
-
-    newObj.default = obj;
-    return newObj;
-  }
-};
-
-babelHelpers.objectWithoutProperties = function (obj, keys) {
-  var target = {};
-
-  for (var i in obj) {
-    if (keys.indexOf(i) >= 0) continue;
-    if (!Object.prototype.hasOwnProperty.call(obj, i)) continue;
-    target[i] = obj[i];
-  }
-
-  return target;
-};
-
-babelHelpers.possibleConstructorReturn = function (self, call) {
-  if (!self) {
-    throw new ReferenceError("this hasn't been initialised - super() hasn't been called");
-  }
-
-  return call && (typeof call === "object" || typeof call === "function") ? call : self;
-};
-
-babelHelpers.slicedToArray = (function () {
-  function sliceIterator(arr, i) {
-    var _arr = [];
-    var _n = true;
-    var _d = false;
-    var _e = undefined;
-
-    try {
-      for (var _i = arr[Symbol.iterator](), _s; !(_n = (_s = _i.next()).done); _n = true) {
-        _arr.push(_s.value);
-
-        if (i && _arr.length === i) break;
-      }
-    } catch (err) {
-      _d = true;
-      _e = err;
-    } finally {
-      try {
-        if (!_n && _i["return"]) _i["return"]();
-      } finally {
-        if (_d) throw _e;
-      }
-    }
-
-    return _arr;
-  }
-
-  return function (arr, i) {
-    if (Array.isArray(arr)) {
-      return arr;
-    } else if (Symbol.iterator in Object(arr)) {
-      return sliceIterator(arr, i);
-    } else {
-      throw new TypeError("Invalid attempt to destructure non-iterable instance");
-    }
-  };
-})();
-
-babelHelpers.taggedTemplateLiteral = function (strings, raw) {
-  return Object.freeze(Object.defineProperties(strings, {
-    raw: {
-      value: Object.freeze(raw)
-    }
-  }));
-};
-
-babelHelpers.toArray = function (arr) {
-  return Array.isArray(arr) ? arr : Array.from(arr);
-};
-
-babelHelpers.toConsumableArray = function (arr) {
-  if (Array.isArray(arr)) {
-    for (var i = 0, arr2 = Array(arr.length); i < arr.length; i++) arr2[i] = arr[i];
-
-    return arr2;
-  } else {
-    return Array.from(arr);
-  }
-};

packages/metro-bundler/src/Resolver/polyfills/console.js

@@ -1,515 +0,0 @@
-/**
- * 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.
- *
- * @polyfill
- * @nolint
- */
-
-/* eslint-disable */
-
-/**
- * This pipes all of our console logging functions to native logging so that
- * JavaScript errors in required modules show up in Xcode via NSLog.
- */
-const inspect = (function() {
-  // Copyright Joyent, Inc. and other Node contributors.
-  //
-  // Permission is hereby granted, free of charge, to any person obtaining a
-  // copy of this software and associated documentation files (the
-  // "Software"), to deal in the Software without restriction, including
-  // without limitation the rights to use, copy, modify, merge, publish,
-  // distribute, sublicense, and/or sell copies of the Software, and to permit
-  // persons to whom the Software is furnished to do so, subject to the
-  // following conditions:
-  //
-  // The above copyright notice and this permission notice shall be included
-  // in all copies or substantial portions of the Software.
-  //
-  // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
-  // OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
-  // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
-  // NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
-  // DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
-  // OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
-  // USE OR OTHER DEALINGS IN THE SOFTWARE.
-  //
-  // https://github.com/joyent/node/blob/master/lib/util.js
-
-  function inspect(obj, opts) {
-    var ctx = {
-      seen: [],
-      stylize: stylizeNoColor
-    };
-    return formatValue(ctx, obj, opts.depth);
-  }
-
-  function stylizeNoColor(str, styleType) {
-    return str;
-  }
-
-  function arrayToHash(array) {
-    var hash = {};
-
-    array.forEach(function(val, idx) {
-      hash[val] = true;
-    });
-
-    return hash;
-  }
-
-
-  function formatValue(ctx, value, recurseTimes) {
-    // Primitive types cannot have properties
-    var primitive = formatPrimitive(ctx, value);
-    if (primitive) {
-      return primitive;
-    }
-
-    // Look up the keys of the object.
-    var keys = Object.keys(value);
-    var visibleKeys = arrayToHash(keys);
-
-    // IE doesn't make error fields non-enumerable
-    // http://msdn.microsoft.com/en-us/library/ie/dww52sbt(v=vs.94).aspx
-    if (isError(value)
-        && (keys.indexOf('message') >= 0 || keys.indexOf('description') >= 0)) {
-      return formatError(value);
-    }
-
-    // Some type of object without properties can be shortcutted.
-    if (keys.length === 0) {
-      if (isFunction(value)) {
-        var name = value.name ? ': ' + value.name : '';
-        return ctx.stylize('[Function' + name + ']', 'special');
-      }
-      if (isRegExp(value)) {
-        return ctx.stylize(RegExp.prototype.toString.call(value), 'regexp');
-      }
-      if (isDate(value)) {
-        return ctx.stylize(Date.prototype.toString.call(value), 'date');
-      }
-      if (isError(value)) {
-        return formatError(value);
-      }
-    }
-
-    var base = '', array = false, braces = ['{', '}'];
-
-    // Make Array say that they are Array
-    if (isArray(value)) {
-      array = true;
-      braces = ['[', ']'];
-    }
-
-    // Make functions say that they are functions
-    if (isFunction(value)) {
-      var n = value.name ? ': ' + value.name : '';
-      base = ' [Function' + n + ']';
-    }
-
-    // Make RegExps say that they are RegExps
-    if (isRegExp(value)) {
-      base = ' ' + RegExp.prototype.toString.call(value);
-    }
-
-    // Make dates with properties first say the date
-    if (isDate(value)) {
-      base = ' ' + Date.prototype.toUTCString.call(value);
-    }
-
-    // Make error with message first say the error
-    if (isError(value)) {
-      base = ' ' + formatError(value);
-    }
-
-    if (keys.length === 0 && (!array || value.length == 0)) {
-      return braces[0] + base + braces[1];
-    }
-
-    if (recurseTimes < 0) {
-      if (isRegExp(value)) {
-        return ctx.stylize(RegExp.prototype.toString.call(value), 'regexp');
-      } else {
-        return ctx.stylize('[Object]', 'special');
-      }
-    }
-
-    ctx.seen.push(value);
-
-    var output;
-    if (array) {
-      output = formatArray(ctx, value, recurseTimes, visibleKeys, keys);
-    } else {
-      output = keys.map(function(key) {
-        return formatProperty(ctx, value, recurseTimes, visibleKeys, key, array);
-      });
-    }
-
-    ctx.seen.pop();
-
-    return reduceToSingleString(output, base, braces);
-  }
-
-
-  function formatPrimitive(ctx, value) {
-    if (isUndefined(value))
-      return ctx.stylize('undefined', 'undefined');
-    if (isString(value)) {
-      var simple = '\'' + JSON.stringify(value).replace(/^"|"$/g, '')
-                                               .replace(/'/g, "\\'")
-                                               .replace(/\\"/g, '"') + '\'';
-      return ctx.stylize(simple, 'string');
-    }
-    if (isNumber(value))
-      return ctx.stylize('' + value, 'number');
-    if (isBoolean(value))
-      return ctx.stylize('' + value, 'boolean');
-    // For some reason typeof null is "object", so special case here.
-    if (isNull(value))
-      return ctx.stylize('null', 'null');
-  }
-
-
-  function formatError(value) {
-    return '[' + Error.prototype.toString.call(value) + ']';
-  }
-
-
-  function formatArray(ctx, value, recurseTimes, visibleKeys, keys) {
-    var output = [];
-    for (var i = 0, l = value.length; i < l; ++i) {
-      if (hasOwnProperty(value, String(i))) {
-        output.push(formatProperty(ctx, value, recurseTimes, visibleKeys,
-            String(i), true));
-      } else {
-        output.push('');
-      }
-    }
-    keys.forEach(function(key) {
-      if (!key.match(/^\d+$/)) {
-        output.push(formatProperty(ctx, value, recurseTimes, visibleKeys,
-            key, true));
-      }
-    });
-    return output;
-  }
-
-
-  function formatProperty(ctx, value, recurseTimes, visibleKeys, key, array) {
-    var name, str, desc;
-    desc = Object.getOwnPropertyDescriptor(value, key) || { value: value[key] };
-    if (desc.get) {
-      if (desc.set) {
-        str = ctx.stylize('[Getter/Setter]', 'special');
-      } else {
-        str = ctx.stylize('[Getter]', 'special');
-      }
-    } else {
-      if (desc.set) {
-        str = ctx.stylize('[Setter]', 'special');
-      }
-    }
-    if (!hasOwnProperty(visibleKeys, key)) {
-      name = '[' + key + ']';
-    }
-    if (!str) {
-      if (ctx.seen.indexOf(desc.value) < 0) {
-        if (isNull(recurseTimes)) {
-          str = formatValue(ctx, desc.value, null);
-        } else {
-          str = formatValue(ctx, desc.value, recurseTimes - 1);
-        }
-        if (str.indexOf('\n') > -1) {
-          if (array) {
-            str = str.split('\n').map(function(line) {
-              return '  ' + line;
-            }).join('\n').substr(2);
-          } else {
-            str = '\n' + str.split('\n').map(function(line) {
-              return '   ' + line;
-            }).join('\n');
-          }
-        }
-      } else {
-        str = ctx.stylize('[Circular]', 'special');
-      }
-    }
-    if (isUndefined(name)) {
-      if (array && key.match(/^\d+$/)) {
-        return str;
-      }
-      name = JSON.stringify('' + key);
-      if (name.match(/^"([a-zA-Z_][a-zA-Z_0-9]*)"$/)) {
-        name = name.substr(1, name.length - 2);
-        name = ctx.stylize(name, 'name');
-      } else {
-        name = name.replace(/'/g, "\\'")
-                   .replace(/\\"/g, '"')
-                   .replace(/(^"|"$)/g, "'");
-        name = ctx.stylize(name, 'string');
-      }
-    }
-
-    return name + ': ' + str;
-  }
-
-
-  function reduceToSingleString(output, base, braces) {
-    var numLinesEst = 0;
-    var length = output.reduce(function(prev, cur) {
-      numLinesEst++;
-      if (cur.indexOf('\n') >= 0) numLinesEst++;
-      return prev + cur.replace(/\u001b\[\d\d?m/g, '').length + 1;
-    }, 0);
-
-    if (length > 60) {
-      return braces[0] +
-             (base === '' ? '' : base + '\n ') +
-             ' ' +
-             output.join(',\n  ') +
-             ' ' +
-             braces[1];
-    }
-
-    return braces[0] + base + ' ' + output.join(', ') + ' ' + braces[1];
-  }
-
-
-  // NOTE: These type checking functions intentionally don't use `instanceof`
-  // because it is fragile and can be easily faked with `Object.create()`.
-  function isArray(ar) {
-    return Array.isArray(ar);
-  }
-
-  function isBoolean(arg) {
-    return typeof arg === 'boolean';
-  }
-
-  function isNull(arg) {
-    return arg === null;
-  }
-
-  function isNullOrUndefined(arg) {
-    return arg == null;
-  }
-
-  function isNumber(arg) {
-    return typeof arg === 'number';
-  }
-
-  function isString(arg) {
-    return typeof arg === 'string';
-  }
-
-  function isSymbol(arg) {
-    return typeof arg === 'symbol';
-  }
-
-  function isUndefined(arg) {
-    return arg === void 0;
-  }
-
-  function isRegExp(re) {
-    return isObject(re) && objectToString(re) === '[object RegExp]';
-  }
-
-  function isObject(arg) {
-    return typeof arg === 'object' && arg !== null;
-  }
-
-  function isDate(d) {
-    return isObject(d) && objectToString(d) === '[object Date]';
-  }
-
-  function isError(e) {
-    return isObject(e) &&
-        (objectToString(e) === '[object Error]' || e instanceof Error);
-  }
-
-  function isFunction(arg) {
-    return typeof arg === 'function';
-  }
-
-  function isPrimitive(arg) {
-    return arg === null ||
-           typeof arg === 'boolean' ||
-           typeof arg === 'number' ||
-           typeof arg === 'string' ||
-           typeof arg === 'symbol' ||  // ES6 symbol
-           typeof arg === 'undefined';
-  }
-
-  function objectToString(o) {
-    return Object.prototype.toString.call(o);
-  }
-
-  function hasOwnProperty(obj, prop) {
-    return Object.prototype.hasOwnProperty.call(obj, prop);
-  }
-
-  return inspect;
-})();
-
-
-const OBJECT_COLUMN_NAME = '(index)';
-const LOG_LEVELS = {
-  trace: 0,
-  info: 1,
-  warn: 2,
-  error: 3
-};
-const INSPECTOR_LEVELS = [];
-INSPECTOR_LEVELS[LOG_LEVELS.trace] = 'debug';
-INSPECTOR_LEVELS[LOG_LEVELS.info] = 'log';
-INSPECTOR_LEVELS[LOG_LEVELS.warn] = 'warning';
-INSPECTOR_LEVELS[LOG_LEVELS.error] = 'error';
-
-// Strip the inner function in getNativeLogFunction(), if in dev also
-// strip method printing to originalConsole.
-const INSPECTOR_FRAMES_TO_SKIP = __DEV__ ? 2 : 1;
-
-if (global.nativeLoggingHook) {
-  function getNativeLogFunction(level) {
-    return function() {
-      let str;
-      if (arguments.length === 1 && typeof arguments[0] === 'string') {
-        str = arguments[0];
-      } else {
-        str = Array.prototype.map.call(arguments, function(arg) {
-          return inspect(arg, {depth: 10});
-        }).join(', ');
-      }
-
-      let logLevel = level;
-      if (str.slice(0, 9) === 'Warning: ' && logLevel >= LOG_LEVELS.error) {
-        // React warnings use console.error so that a stack trace is shown,
-        // but we don't (currently) want these to show a redbox
-        // (Note: Logic duplicated in ExceptionsManager.js.)
-        logLevel = LOG_LEVELS.warn;
-      }
-      if (global.__inspectorLog) {
-        global.__inspectorLog(
-          INSPECTOR_LEVELS[logLevel],
-          str,
-          [].slice.call(arguments),
-          INSPECTOR_FRAMES_TO_SKIP);
-      }
-      global.nativeLoggingHook(str, logLevel);
-    };
-  }
-
-  function repeat(element, n) {
-    return Array.apply(null, Array(n)).map(function() { return element; });
-  };
-
-  function consoleTablePolyfill(rows) {
-    // convert object -> array
-    if (!Array.isArray(rows)) {
-      var data = rows;
-      rows = [];
-      for (var key in data) {
-        if (data.hasOwnProperty(key)) {
-          var row = data[key];
-          row[OBJECT_COLUMN_NAME] = key;
-          rows.push(row);
-        }
-      }
-    }
-    if (rows.length === 0) {
-      global.nativeLoggingHook('', LOG_LEVELS.info);
-      return;
-    }
-
-    var columns = Object.keys(rows[0]).sort();
-    var stringRows = [];
-    var columnWidths = [];
-
-    // Convert each cell to a string. Also
-    // figure out max cell width for each column
-    columns.forEach(function(k, i) {
-      columnWidths[i] = k.length;
-      for (var j = 0; j < rows.length; j++) {
-        var cellStr = (rows[j][k] || '?').toString();
-        stringRows[j] = stringRows[j] || [];
-        stringRows[j][i] = cellStr;
-        columnWidths[i] = Math.max(columnWidths[i], cellStr.length);
-      }
-    });
-
-    // Join all elements in the row into a single string with | separators
-    // (appends extra spaces to each cell to make separators  | alligned)
-    function joinRow(row, space) {
-      var cells = row.map(function(cell, i) {
-        var extraSpaces = repeat(' ', columnWidths[i] - cell.length).join('');
-        return cell + extraSpaces;
-      });
-      space = space || ' ';
-      return cells.join(space + '|' + space);
-    };
-
-    var separators = columnWidths.map(function(columnWidth) {
-      return repeat('-', columnWidth).join('');
-    });
-    var separatorRow = joinRow(separators, '-');
-    var header = joinRow(columns);
-    var table = [header, separatorRow];
-
-    for (var i = 0; i < rows.length; i++) {
-      table.push(joinRow(stringRows[i]));
-    }
-
-    // Notice extra empty line at the beginning.
-    // Native logging hook adds "RCTLog >" at the front of every
-    // logged string, which would shift the header and screw up
-    // the table
-    global.nativeLoggingHook('\n' + table.join('\n'), LOG_LEVELS.info);
-  }
-
-  const originalConsole = global.console;
-  global.console = {
-    error: getNativeLogFunction(LOG_LEVELS.error),
-    info: getNativeLogFunction(LOG_LEVELS.info),
-    log: getNativeLogFunction(LOG_LEVELS.info),
-    warn: getNativeLogFunction(LOG_LEVELS.warn),
-    trace: getNativeLogFunction(LOG_LEVELS.trace),
-    debug: getNativeLogFunction(LOG_LEVELS.trace),
-    table: consoleTablePolyfill
-  };
-
-  // If available, also call the original `console` method since that is
-  // sometimes useful. Ex: on OS X, this will let you see rich output in
-  // the Safari Web Inspector console.
-  if (__DEV__ && originalConsole) {
-    // Preserve the original `console` as `originalConsole`
-    const descriptor = Object.getOwnPropertyDescriptor(global, 'console');
-    if (descriptor) {
-      Object.defineProperty(global, 'originalConsole', descriptor);
-    }
-
-    Object.keys(console).forEach(methodName => {
-      const reactNativeMethod = console[methodName];
-      if (originalConsole[methodName]) {
-        console[methodName] = function() {
-          originalConsole[methodName](...arguments);
-          reactNativeMethod.apply(console, arguments);
-        };
-      }
-    });
-  }
-} else if (!global.console) {
-  function consoleLoggingStub() {};
-  global.console = {
-    error: consoleLoggingStub,
-    info: consoleLoggingStub,
-    log: consoleLoggingStub,
-    warn: consoleLoggingStub,
-    trace: consoleLoggingStub,
-    debug: consoleLoggingStub,
-    table: consoleLoggingStub
-  };
-}

packages/metro-bundler/src/Resolver/polyfills/error-guard.js

@@ -1,90 +0,0 @@
-/**
- * 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.
- *
- * @polyfill
- */
-
-/* eslint-disable strict */
-
-let _inGuard = 0;
-
-/**
- * This is the error handler that is called when we encounter an exception
- * when loading a module. This will report any errors encountered before
- * ExceptionsManager is configured.
- */
-let _globalHandler = function onError(e) {
-  throw e;
-};
-
-/**
- * The particular require runtime that we are using looks for a global
- * `ErrorUtils` object and if it exists, then it requires modules with the
- * error handler specified via ErrorUtils.setGlobalHandler by calling the
- * require function with applyWithGuard. Since the require module is loaded
- * before any of the modules, this ErrorUtils must be defined (and the handler
- * set) globally before requiring anything.
- */
-const ErrorUtils = {
-  setGlobalHandler(fun) {
-    _globalHandler = fun;
-  },
-  getGlobalHandler() {
-    return _globalHandler;
-  },
-  reportError(error) {
-    _globalHandler && _globalHandler(error);
-  },
-  reportFatalError(error) {
-    _globalHandler && _globalHandler(error, true);
-  },
-  applyWithGuard(fun, context, args) {
-    try {
-      _inGuard++;
-      return fun.apply(context, args);
-    } catch (e) {
-      ErrorUtils.reportError(e);
-    } finally {
-      _inGuard--;
-    }
-    return null;
-  },
-  applyWithGuardIfNeeded(fun, context, args) {
-    if (ErrorUtils.inGuard()) {
-      return fun.apply(context, args);
-    } else {
-      ErrorUtils.applyWithGuard(fun, context, args);
-    }
-    return null;
-  },
-  inGuard() {
-    return _inGuard;
-  },
-  guard(fun, name, context) {
-    if (typeof fun !== 'function') {
-      console.warn('A function must be passed to ErrorUtils.guard, got ', fun);
-      return null;
-    }
-    name = name || fun.name || '<generated guard>';
-    function guarded() {
-      return (
-        ErrorUtils.applyWithGuard(
-          fun,
-          context || this,
-          arguments,
-          null,
-          name
-        )
-      );
-    }
-
-    return guarded;
-  },
-};
-
-global.ErrorUtils = ErrorUtils;

packages/metro-bundler/src/Server/index.js

@@ -67,6 +67,7 @@ type Options = {
   blacklistRE?: RegExp,
   cacheVersion?: string,
   extraNodeModules?: {},
+  getPolyfills: ({platform: ?string}) => $ReadOnlyArray<string>,
   getTransformOptions?: GetTransformOptions,
   globalTransformCache: ?GlobalTransformCache,
   hasteImpl?: HasteImpl,
@@ -127,6 +128,7 @@ class Server {
     blacklistRE: void | RegExp,
     cacheVersion: string,
     extraNodeModules: {},
+    getPolyfills: ({platform: ?string}) => $ReadOnlyArray<string>,
     getTransformOptions?: GetTransformOptions,
     hasteImpl?: HasteImpl,
     maxWorkers: number,
@@ -171,6 +173,7 @@ class Server {
       blacklistRE: options.blacklistRE,
       cacheVersion: options.cacheVersion || '1.0',
       extraNodeModules: options.extraNodeModules || {},
+      getPolyfills: options.getPolyfills,
       getTransformOptions: options.getTransformOptions,
       globalTransformCache: options.globalTransformCache,
       hasteImpl: options.hasteImpl,

packages/metro-bundler/src/defaults.js

@@ -24,18 +24,6 @@ exports.moduleSystem = require.resolve('./Resolver/polyfills/require.js');
 
 exports.platforms = ['ios', 'android', 'windows', 'web'];
 
-exports.polyfills = [
-  require.resolve('./Resolver/polyfills/Object.es6.js'),
-  require.resolve('./Resolver/polyfills/console.js'),
-  require.resolve('./Resolver/polyfills/error-guard.js'),
-  require.resolve('./Resolver/polyfills/Number.es6.js'),
-  require.resolve('./Resolver/polyfills/String.prototype.es6.js'),
-  require.resolve('./Resolver/polyfills/Array.prototype.es6.js'),
-  require.resolve('./Resolver/polyfills/Array.es6.js'),
-  require.resolve('./Resolver/polyfills/Object.es7.js'),
-  require.resolve('./Resolver/polyfills/babelHelpers.js'),
-];
-
 exports.providesModuleNodeModules = [
   'react-native',
   'react-native-windows',

packages/metro-bundler/src/index.js

@@ -36,6 +36,7 @@ type Options = {
   +sourceExts: ?Array<string>,
   +transformCache: TransformCache,
   +transformModulePath: string,
+  getPolyfills: ({platform: ?string}) => $ReadOnlyArray<string>,
   globalTransformCache: ?GlobalTransformCache,
   hasteImpl?: HasteImpl,
   +maxWorkers?: number,

packages/metro-bundler/src/integration_tests/__tests__/basic_bundle-test.js

@@ -13,50 +13,7 @@
 
 jest.useRealTimers().unmock('fs').unmock('graceful-fs');
 
-/**
- * Don't waste time creating a worker-farm from jest-haste-map, use the function
- * directly instead.
- */
-jest.mock('worker-farm', () => {
-  function workerFarm(opts, workerPath, methodNames) {
-    return require(workerPath);
-  }
-  workerFarm.end = () => {};
-  return workerFarm;
-});
-
-/**
- * We replace the farm by a simple require, so that the worker sources are
- * transformed and managed by jest.
- */
-jest.mock('../../worker-farm', () => {
-  let ended = false;
-  function workerFarm(opts, workerPath, methodNames) {
-    const {Readable} = require('stream');
-    const methods = {};
-    const worker = require(workerPath);
-    methodNames.forEach(name => {
-      methods[name] = function() {
-        if (ended) {
-          throw new Error('worker farm was ended');
-        }
-        return worker[name].apply(null, arguments);
-      };
-    });
-    return {
-      stdout: new Readable({read() {}}),
-      stderr: new Readable({read() {}}),
-      methods,
-    };
-  }
-  workerFarm.end = () => {
-    ended = true;
-  };
-  return workerFarm;
-});
-
 const Packager = require('../..');
-
 const path = require('path');
 
 jasmine.DEFAULT_TIMEOUT_INTERVAL = 30 * 1000;
@@ -65,9 +22,62 @@ const INPUT_PATH = path.resolve(__dirname, '../basic_bundle');
 const POLYFILLS_PATH = path.resolve(__dirname, '../../Resolver/polyfills');
 
 describe('basic_bundle', () => {
-  it('bundles package as expected', async () => {
+  const absPathRe = new RegExp(INPUT_PATH, 'g');
-    const bundle = await Packager.buildBundle(
+  const polyfill1 = path.join(INPUT_PATH, 'polyfill-1.js');
+  const polyfill2 = path.join(INPUT_PATH, 'polyfill-2.js');
+
+  beforeEach(() => {
+    // Don't waste time creating a worker-farm from jest-haste-map, use the
+    // function directly instead.
+    jest.mock('worker-farm', () => {
+      function workerFarm(opts, workerPath, methodNames) {
+        return require(workerPath);
+      }
+      workerFarm.end = () => {};
+      return workerFarm;
+    });
+    // We replace the farm by a simple require, so that the worker sources are
+    // transformed and managed by jest.
+    jest.mock('../../worker-farm', () => {
+      let ended = false;
+
+      function workerFarm(opts, workerPath, methodNames) {
+        const {Readable} = require('stream');
+        const methods = {};
+        const worker = require(workerPath);
+
+        methodNames.forEach(name => {
+          methods[name] = function() {
+            if (ended) {
+              throw new Error('worker farm was ended');
+            }
+            return worker[name].apply(null, arguments);
+          };
+        });
+
+        return {
+          stdout: new Readable({read() {}}),
+          stderr: new Readable({read() {}}),
+          methods,
+        };
+      }
+
+      workerFarm.end = () => {
+        ended = true;
+      };
+
+      return workerFarm;
+    });
+  });
+
+  afterEach(() => {
+    jest.resetModules();
+  });
+
+  it('bundles package with polyfills as expected', async () => {
+    const bundleWithPolyfills = await Packager.buildBundle(
       {
+        getPolyfills: () => [polyfill1, polyfill2],
         projectRoots: [INPUT_PATH, POLYFILLS_PATH],
         transformCache: Packager.TransformCaching.none(),
         transformModulePath: require.resolve('../../transformer'),
@@ -79,7 +89,30 @@ describe('basic_bundle', () => {
         platform: 'ios',
       },
     );
-    const absPathRe = new RegExp(INPUT_PATH, 'g');
+
-    expect(bundle.getSource().replace(absPathRe, '')).toMatchSnapshot();
+    expect(
+      bundleWithPolyfills.getSource().replace(absPathRe, ''),
+    ).toMatchSnapshot();
+  });
+
+  it('bundles package without polyfills as expected', async () => {
+    const bundleWithoutPolyfills = await Packager.buildBundle(
+      {
+        getPolyfills: () => [polyfill1, polyfill2],
+        projectRoots: [INPUT_PATH, POLYFILLS_PATH],
+        transformCache: Packager.TransformCaching.none(),
+        transformModulePath: require.resolve('../../transformer'),
+        nonPersistent: true,
+      },
+      {
+        dev: false,
+        entryFile: path.join(INPUT_PATH, 'TestBundle.js'),
+        platform: 'ios',
+      },
+    );
+
+    expect(
+      bundleWithoutPolyfills.getSource().replace(absPathRe, ''),
+    ).toMatchSnapshot();
   });
 });

packages/metro-bundler/src/integration_tests/basic_bundle/polyfill-1.js

@@ -0,0 +1,42 @@
+// Copyright 2004-present Facebook. All Rights Reserved.
+
+if (!Object.keys) {
+  Object.keys = (function() {
+    'use strict';
+    var hasOwnProperty = Object.prototype.hasOwnProperty,
+        hasDontEnumBug = !({toString: null}).propertyIsEnumerable('toString'),
+        dontEnums = [
+          'toString',
+          'toLocaleString',
+          'valueOf',
+          'hasOwnProperty',
+          'isPrototypeOf',
+          'propertyIsEnumerable',
+          'constructor',
+        ],
+        dontEnumsLength = dontEnums.length;
+
+    return function(obj) {
+      if (typeof obj !== 'object' && (typeof obj !== 'function' || obj === null)) {
+        throw new TypeError('Object.keys called on non-object');
+      }
+
+      var result = [], prop, i;
+
+      for (prop in obj) {
+        if (hasOwnProperty.call(obj, prop)) {
+          result.push(prop);
+        }
+      }
+
+      if (hasDontEnumBug) {
+        for (i = 0; i < dontEnumsLength; i++) {
+          if (hasOwnProperty.call(obj, dontEnums[i])) {
+            result.push(dontEnums[i]);
+          }
+        }
+      }
+      return result;
+    };
+  }());
+}

packages/metro-bundler/src/integration_tests/basic_bundle/polyfill-2.js

@@ -0,0 +1,43 @@
+// Copyright 2004-present Facebook. All Rights Reserved.
+
+if (!String.prototype.repeat) {
+  String.prototype.repeat = function(count) {
+    'use strict';
+    if (this == null) {
+      throw new TypeError('can\'t convert ' + this + ' to object');
+    }
+    var str = '' + this;
+    count = +count;
+    if (count != count) {
+      count = 0;
+    }
+    if (count < 0) {
+      throw new RangeError('repeat count must be non-negative');
+    }
+    if (count == Infinity) {
+      throw new RangeError('repeat count must be less than infinity');
+    }
+    count = Math.floor(count);
+    if (str.length == 0 || count == 0) {
+      return '';
+    }
+    // Ensuring count is a 31-bit integer allows us to heavily optimize the
+    // main part. But anyway, most current (August 2014) browsers can't handle
+    // strings 1 << 28 chars or longer, so:
+    if (str.length * count >= 1 << 28) {
+      throw new RangeError('repeat count must not overflow maximum string size');
+    }
+    var rpt = '';
+    for (;;) {
+      if ((count & 1) == 1) {
+        rpt += str;
+      }
+      count >>>= 1;
+      if (count == 0) {
+        break;
+      }
+      str += str;
+    }
+    return rpt;
+  };
+}