Bring back node-haste to fbsource

Summary:
Since jest stopped using node-haste a while ago, we are the only client left.
This brings back node-haste back to fbsource to allow us to iterate faster.

Reviewed By: bestander

Differential Revision: D3641341

fbshipit-source-id: a859f8834765723a3515e2cf265581b9dd83997c

react-packager/index.js

@@ -10,7 +10,7 @@
 
 require('../babelRegisterOnly')([/react-packager\/src/]);
 
-require('node-haste/lib/fastpath').replace();
+require('./src/node-haste/fastpath').replace();
 useGracefulFs();
 
 var debug = require('debug');

react-packager/src/AssetServer/__tests__/AssetServer-test.js

@@ -23,8 +23,8 @@ var fs = require('fs');
 
 describe('AssetServer', () => {
   beforeEach(() => {
-    const NodeHaste = require('node-haste');
-    NodeHaste.getAssetDataFromName = require.requireActual('node-haste/lib/lib/getAssetDataFromName');
+    const NodeHaste = require('../../node-haste');
+    NodeHaste.getAssetDataFromName = require.requireActual('../../node-haste/lib/getAssetDataFromName');
   });
 
   describe('assetServer.get', () => {

react-packager/src/AssetServer/index.js

@@ -13,7 +13,7 @@ const Promise = require('promise');
 const crypto = require('crypto');
 const declareOpts = require('../lib/declareOpts');
 const fs = require('fs');
-const getAssetDataFromName = require('node-haste').getAssetDataFromName;
+const getAssetDataFromName = require('../node-haste').getAssetDataFromName;
 const path = require('path');
 
 const createTimeoutPromise = (timeout) => new Promise((resolve, reject) => {

react-packager/src/Bundler/__tests__/Bundler-test.js

@@ -17,7 +17,7 @@ jest
   .mock('fs')
   .mock('assert')
   .mock('progress')
-  .mock('node-haste')
+  .mock('../../node-haste')
   .mock('../../JSTransformer')
   .mock('../../lib/declareOpts')
   .mock('../../Resolver')

react-packager/src/Bundler/index.js

@@ -13,7 +13,7 @@ const fs = require('fs');
 const path = require('path');
 const Promise = require('promise');
 const ProgressBar = require('progress');
-const Cache = require('node-haste').Cache;
+const Cache = require('../node-haste').Cache;
 const Transformer = require('../JSTransformer');
 const Resolver = require('../Resolver');
 const Bundle = require('./Bundle');

react-packager/src/Resolver/__tests__/Resolver-test.js

@@ -13,7 +13,7 @@ jest.mock('path');
 
 
 const DependencyGraph = jest.fn();
-jest.setMock('node-haste', DependencyGraph);
+jest.setMock('../../node-haste', DependencyGraph);
 let Module;
 let Polyfill;
 
@@ -36,7 +36,7 @@ describe('Resolver', function() {
       return polyfill;
     });
 
-    DependencyGraph.replacePatterns = require.requireActual('node-haste/lib/lib/replacePatterns');
+    DependencyGraph.replacePatterns = require.requireActual('../../node-haste/lib/replacePatterns');
     DependencyGraph.prototype.createPolyfill = jest.fn();
     DependencyGraph.prototype.getDependencies = jest.fn();
 

react-packager/src/Resolver/index.js

@@ -11,7 +11,7 @@
 
 const path = require('path');
 const Activity = require('../Activity');
-const DependencyGraph = require('node-haste');
+const DependencyGraph = require('../node-haste');
 const declareOpts = require('../lib/declareOpts');
 const Promise = require('promise');
 

react-packager/src/Server/__tests__/Server-test.js

@@ -18,7 +18,7 @@ jest.setMock('worker-farm', function() { return () => {}; })
     .mock('../../Bundler')
     .mock('../../AssetServer')
     .mock('../../lib/declareOpts')
-    .mock('node-haste')
+    .mock('../../node-haste')
     .mock('../../Activity');
 
 let FileWatcher;
@@ -64,7 +64,7 @@ describe('processRequest', () => {
   let triggerFileChange;
 
   beforeEach(() => {
-    FileWatcher = require('node-haste').FileWatcher;
+    FileWatcher = require('../../node-haste').FileWatcher;
     Bundler.prototype.bundle = jest.fn(() =>
       Promise.resolve({
         getSource: () => 'this is the source',

react-packager/src/Server/index.js

@@ -10,8 +10,8 @@
 
 const Activity = require('../Activity');
 const AssetServer = require('../AssetServer');
-const FileWatcher = require('node-haste').FileWatcher;
-const getPlatformExtension = require('node-haste').getPlatformExtension;
+const FileWatcher = require('../node-haste').FileWatcher;
+const getPlatformExtension = require('../node-haste').getPlatformExtension;
 const Bundler = require('../Bundler');
 const Promise = require('promise');
 const SourceMapConsumer = require('source-map').SourceMapConsumer;

react-packager/src/__mocks__/fs.js

@@ -8,4 +8,4 @@
  */
 'use strict';
 
-module.exports = require.requireActual('node-haste/mocks/graceful-fs');
+module.exports = require.requireActual('../node-haste/__mocks__/graceful-fs');

react-packager/src/node-haste/AssetModule.js

@@ -0,0 +1,47 @@
+'use strict';
+
+const Module = require('./Module');
+const getAssetDataFromName = require('./lib/getAssetDataFromName');
+
+class AssetModule extends Module {
+  constructor(args, platforms) {
+    super(args);
+    const { resolution, name, type } = getAssetDataFromName(this.path, platforms);
+    this.resolution = resolution;
+    this._name = name;
+    this._type = type;
+    this._dependencies = args.dependencies || [];
+  }
+
+  isHaste() {
+    return Promise.resolve(false);
+  }
+
+  getDependencies() {
+    return Promise.resolve(this._dependencies);
+  }
+
+  read() {
+    return Promise.resolve({});
+  }
+
+  getName() {
+    return super.getName().then(
+      id => id.replace(/\/[^\/]+$/, `/${this._name}.${this._type}`)
+    );
+  }
+
+  hash() {
+    return `AssetModule : ${this.path}`;
+  }
+
+  isJSON() {
+    return false;
+  }
+
+  isAsset() {
+    return true;
+  }
+}
+
+module.exports = AssetModule;

react-packager/src/node-haste/AssetModule_DEPRECATED.js

@@ -0,0 +1,45 @@
+'use strict';
+
+const Module = require('./Module');
+const getAssetDataFromName = require('./lib/getAssetDataFromName');
+
+class AssetModule_DEPRECATED extends Module {
+  constructor(args, platforms) {
+    super(args);
+    const {resolution, name} = getAssetDataFromName(this.path, platforms);
+    this.resolution = resolution;
+    this.name = name;
+    this.platforms = platforms;
+  }
+
+  isHaste() {
+    return Promise.resolve(false);
+  }
+
+  getName() {
+    return Promise.resolve(`image!${this.name}`);
+  }
+
+  getDependencies() {
+    return Promise.resolve([]);
+  }
+
+  hash() {
+    return `AssetModule_DEPRECATED : ${this.path}`;
+  }
+
+  isJSON() {
+    return false;
+  }
+
+  isAsset_DEPRECATED() {
+    return true;
+  }
+
+  resolution() {
+    return getAssetDataFromName(this.path, this.platforms).resolution;
+  }
+
+}
+
+module.exports = AssetModule_DEPRECATED;

react-packager/src/node-haste/Cache/__mocks__/index.js

@@ -0,0 +1,20 @@
+/**
+ * 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.
+ */
+'use strict';
+
+class Cache {
+  get(filepath, field, cb) {
+    return cb(filepath);
+  }
+
+  invalidate(filepath) { }
+  end() { }
+}
+
+module.exports = Cache;

react-packager/src/node-haste/Cache/__tests__/Cache-test.js

@@ -0,0 +1,336 @@
+/**
+ * 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.
+ */
+'use strict';
+
+jest
+  .dontMock('absolute-path')
+  .dontMock('../');
+
+jest
+  .mock('fs')
+  .setMock('os', {
+    tmpDir() { return 'tmpDir'; },
+  });
+
+jest.useRealTimers();
+
+
+describe('Cache', () => {
+  let Cache, fs;
+  beforeEach(() => {
+    Cache = require('../');
+    fs = require('graceful-fs');
+  });
+
+  describe('getting/setting', () => {
+    pit('calls loader callback for uncached file', () => {
+      fs.stat.mockImpl((file, callback) => {
+        callback(null, {
+          mtime: {
+            getTime: () => {},
+          },
+        });
+      });
+
+      var cache = new Cache({
+        cacheKey: 'cache',
+      });
+      var loaderCb = jest.genMockFn().mockImpl(() => Promise.resolve());
+
+      return cache
+        .get('/rootDir/someFile', 'field', loaderCb)
+        .then($ =>
+          expect(loaderCb).toBeCalledWith('/rootDir/someFile')
+        );
+    });
+
+    pit('supports storing multiple fields', () => {
+      fs.stat.mockImpl((file, callback) => {
+        callback(null, {
+          mtime: {
+            getTime: () => {},
+          },
+        });
+      });
+
+      var cache = new Cache({
+        cacheKey: 'cache',
+      });
+      var index = 0;
+      var loaderCb = jest.genMockFn().mockImpl(() =>
+        Promise.resolve(index++)
+      );
+
+      return cache
+        .get('/rootDir/someFile', 'field1', loaderCb)
+        .then(value => {
+          expect(value).toBe(0);
+          return cache
+            .get('/rootDir/someFile', 'field2', loaderCb)
+            .then(value2 => expect(value2).toBe(1));
+        });
+    });
+
+    pit('gets the value from the loader callback', () => {
+      fs.stat.mockImpl((file, callback) =>
+        callback(null, {
+          mtime: {
+            getTime: () => {},
+          },
+        })
+      );
+
+      var cache = new Cache({
+        cacheKey: 'cache',
+      });
+      var loaderCb = jest.genMockFn().mockImpl(() =>
+        Promise.resolve('lol')
+      );
+
+      return cache
+        .get('/rootDir/someFile', 'field', loaderCb)
+        .then(value => expect(value).toBe('lol'));
+    });
+
+    pit('caches the value after the first call', () => {
+      fs.stat.mockImpl((file, callback) => {
+        callback(null, {
+          mtime: {
+            getTime: () => {},
+          },
+        });
+      });
+
+      var cache = new Cache({
+        cacheKey: 'cache',
+      });
+      var loaderCb = jest.genMockFn().mockImpl(() =>
+        Promise.resolve('lol')
+      );
+
+      return cache
+        .get('/rootDir/someFile', 'field', loaderCb)
+        .then(() => {
+          var shouldNotBeCalled = jest.genMockFn();
+          return cache.get('/rootDir/someFile', 'field', shouldNotBeCalled)
+            .then(value => {
+              expect(shouldNotBeCalled).not.toBeCalled();
+              expect(value).toBe('lol');
+            });
+        });
+    });
+
+    pit('clears old field when getting new field and mtime changed', () => {
+      var mtime = 0;
+      fs.stat.mockImpl((file, callback) => {
+        callback(null, {
+          mtime: {
+            getTime: () => mtime++,
+          },
+        });
+      });
+
+      var cache = new Cache({
+        cacheKey: 'cache',
+      });
+      var loaderCb = jest.genMockFn().mockImpl(() =>
+        Promise.resolve('lol' + mtime)
+      );
+
+      return cache
+        .get('/rootDir/someFile', 'field1', loaderCb)
+        .then(value => cache
+          .get('/rootDir/someFile', 'field2', loaderCb)
+          .then(value2 => cache
+            .get('/rootDir/someFile', 'field1', loaderCb)
+            .then(value3 => expect(value3).toBe('lol2'))
+          )
+        );
+    });
+  });
+
+  describe('loading cache from disk', () => {
+    var fileStats;
+
+    beforeEach(() => {
+      fileStats = {
+        '/rootDir/someFile': {
+          mtime: {
+            getTime: () => 22,
+          },
+        },
+        '/rootDir/foo': {
+          mtime: {
+            getTime: () => 11,
+          },
+        },
+      };
+
+      fs.existsSync.mockImpl(() => true);
+
+      fs.statSync.mockImpl(filePath => fileStats[filePath]);
+
+      fs.readFileSync.mockImpl(() => JSON.stringify({
+        '/rootDir/someFile': {
+          metadata: {mtime: 22},
+          data: {field: 'oh hai'},
+        },
+        '/rootDir/foo': {
+          metadata: {mtime: 11},
+          data: {field: 'lol wat'},
+        },
+      }));
+    });
+
+    pit('should load cache from disk', () => {
+      var cache = new Cache({
+        cacheKey: 'cache',
+      });
+      var loaderCb = jest.genMockFn();
+
+      return cache
+        .get('/rootDir/someFile', 'field', loaderCb)
+        .then(value => {
+          expect(loaderCb).not.toBeCalled();
+          expect(value).toBe('oh hai');
+
+          return cache
+            .get('/rootDir/foo', 'field', loaderCb)
+            .then(val => {
+              expect(loaderCb).not.toBeCalled();
+              expect(val).toBe('lol wat');
+            });
+        });
+    });
+
+    pit('should not load outdated cache', () => {
+      fs.stat.mockImpl((file, callback) =>
+        callback(null, {
+          mtime: {
+            getTime: () => {},
+          },
+        })
+      );
+
+      fileStats['/rootDir/foo'].mtime.getTime = () => 123;
+
+      var cache = new Cache({
+        cacheKey: 'cache',
+      });
+      var loaderCb = jest.genMockFn().mockImpl(() =>
+        Promise.resolve('new value')
+      );
+
+      return cache
+        .get('/rootDir/someFile', 'field', loaderCb)
+        .then(value => {
+          expect(loaderCb).not.toBeCalled();
+          expect(value).toBe('oh hai');
+
+          return cache
+            .get('/rootDir/foo', 'field', loaderCb)
+            .then(val => {
+              expect(loaderCb).toBeCalled();
+              expect(val).toBe('new value');
+            });
+        });
+    });
+  });
+
+  describe('writing cache to disk', () => {
+    it('should write cache to disk', (done) => {
+      var index = 0;
+      var mtimes = [10, 20, 30];
+
+      fs.stat.mockImpl((file, callback) =>
+        callback(null, {
+          mtime: {
+            getTime: () => mtimes[index++],
+          },
+        })
+      );
+
+      var cache = new Cache({
+        cacheKey: 'cache',
+      });
+
+      cache.get('/rootDir/bar', 'field', () =>
+        Promise.resolve('bar value')
+      );
+      cache.get('/rootDir/foo', 'field', () =>
+        Promise.resolve('foo value')
+      );
+      cache.get('/rootDir/baz', 'field', () =>
+        Promise.resolve('baz value')
+      );
+
+      setTimeout(() => {
+        expect(fs.writeFile).toBeCalled();
+        done();
+      }, 2020);
+    });
+  });
+
+  describe('check for cache presence', () => {
+    it('synchronously resolves cache presence', () => {
+      fs.stat.mockImpl((file, callback) =>
+        callback(null, {
+          mtime: {
+            getTime: () => {},
+          },
+        })
+      );
+
+      var cache = new Cache({
+        cacheKey: 'cache',
+      });
+      var loaderCb = jest.genMockFn().mockImpl(() =>
+        Promise.resolve('banana')
+      );
+      var file = '/rootDir/someFile';
+
+      return cache
+        .get(file, 'field', loaderCb)
+        .then(() => {
+          expect(cache.has(file)).toBe(true);
+          expect(cache.has(file, 'field')).toBe(true);
+          expect(cache.has(file, 'foo')).toBe(false);
+        });
+    });
+  });
+
+  describe('invalidate', () => {
+    it('invalidates the cache per file or per-field', () => {
+      fs.stat.mockImpl((file, callback) =>
+        callback(null, {
+          mtime: {
+            getTime: () => {},
+          },
+        })
+      );
+
+      var cache = new Cache({
+        cacheKey: 'cache',
+      });
+      var loaderCb = jest.genMockFn().mockImpl(() =>
+        Promise.resolve('banana')
+      );
+      var file = '/rootDir/someFile';
+
+      return cache.get(file, 'field', loaderCb).then(() => {
+        expect(cache.has(file)).toBe(true);
+        cache.invalidate(file, 'field');
+        expect(cache.has(file)).toBe(true);
+        expect(cache.has(file, 'field')).toBe(false);
+        cache.invalidate(file);
+        expect(cache.has(file)).toBe(false);
+      });
+    });
+  });
+});

react-packager/src/node-haste/Cache/index.js

@@ -0,0 +1,217 @@
+/**
+ * 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.
+ */
+'use strict';
+
+const denodeify = require('denodeify');
+const crypto = require('crypto');
+const fs = require('graceful-fs');
+const isAbsolutePath = require('absolute-path');
+const path = require('../fastpath');
+const tmpDir = require('os').tmpDir();
+
+function getObjectValues(object) {
+  return Object.keys(object).map(key => object[key]);
+}
+
+function debounce(fn, delay) {
+  var timeout;
+  return () => {
+    clearTimeout(timeout);
+    timeout = setTimeout(fn, delay);
+  };
+}
+
+class Cache {
+  constructor({
+    resetCache,
+    cacheKey,
+    cacheDirectory = tmpDir,
+  }) {
+    this._cacheFilePath = Cache.getCacheFilePath(cacheDirectory, cacheKey);
+    if (!resetCache) {
+      this._data = this._loadCacheSync(this._cacheFilePath);
+    } else {
+      this._data = Object.create(null);
+    }
+
+    this._persistEventually = debounce(this._persistCache.bind(this), 2000);
+  }
+
+  static getCacheFilePath(tmpdir, ...args) {
+    const hash = crypto.createHash('md5');
+    args.forEach(arg => hash.update(arg));
+    return path.join(tmpdir, hash.digest('hex'));
+  }
+
+  get(filepath, field, loaderCb) {
+    if (!isAbsolutePath(filepath)) {
+      throw new Error('Use absolute paths');
+    }
+
+    return this.has(filepath, field)
+      ? this._data[filepath].data[field]
+      : this.set(filepath, field, loaderCb(filepath));
+  }
+
+  invalidate(filepath, field) {
+    if (this.has(filepath, field)) {
+      if (field == null) {
+        delete this._data[filepath];
+      } else {
+        delete this._data[filepath].data[field];
+      }
+    }
+  }
+
+  end() {
+    return this._persistCache();
+  }
+
+  has(filepath, field) {
+    return Object.prototype.hasOwnProperty.call(this._data, filepath) &&
+      (field == null || Object.prototype.hasOwnProperty.call(this._data[filepath].data, field));
+  }
+
+  set(filepath, field, loaderPromise) {
+    let record = this._data[filepath];
+    if (!record) {
+      record = Object.create(null);
+      this._data[filepath] = record;
+      this._data[filepath].data = Object.create(null);
+      this._data[filepath].metadata = Object.create(null);
+    }
+
+    record.data[field] = loaderPromise
+      .then(data => Promise.all([
+        data,
+        denodeify(fs.stat)(filepath),
+      ]))
+      .then(([data, stat]) => {
+        this._persistEventually();
+
+        // Evict all existing field data from the cache if we're putting new
+        // more up to date data
+        var mtime = stat.mtime.getTime();
+        if (record.metadata.mtime !== mtime) {
+          record.data = Object.create(null);
+        }
+        record.metadata.mtime = mtime;
+
+        return data;
+      });
+
+    return record.data[field];
+  }
+
+  _persistCache() {
+    if (this._persisting != null) {
+      return this._persisting;
+    }
+
+    const data = this._data;
+    const cacheFilepath = this._cacheFilePath;
+
+    const allPromises = getObjectValues(data)
+      .map(record => {
+        const fieldNames = Object.keys(record.data);
+        const fieldValues = getObjectValues(record.data);
+
+        return Promise
+          .all(fieldValues)
+          .then(ref => {
+            const ret = Object.create(null);
+            ret.metadata = record.metadata;
+            ret.data = Object.create(null);
+            fieldNames.forEach((field, index) =>
+              ret.data[field] = ref[index]
+            );
+
+            return ret;
+          });
+      }
+    );
+
+    this._persisting = Promise.all(allPromises)
+      .then(values => {
+        const json = Object.create(null);
+        Object.keys(data).forEach((key, i) => {
+          // make sure the key wasn't added nor removed after we started
+          // persisting the cache
+          const value = values[i];
+          if (!value) {
+            return;
+          }
+
+          json[key] = Object.create(null);
+          json[key].metadata = data[key].metadata;
+          json[key].data = value.data;
+        });
+        return denodeify(fs.writeFile)(cacheFilepath, JSON.stringify(json));
+      })
+      .catch(e => console.error(
+        '[node-haste] Encountered an error while persisting cache:\n%s',
+        e.stack.split('\n').map(line => '> ' + line).join('\n')
+      ))
+      .then(() => {
+        this._persisting = null;
+        return true;
+      });
+
+    return this._persisting;
+  }
+
+  _loadCacheSync(cachePath) {
+    var ret = Object.create(null);
+    var cacheOnDisk = loadCacheSync(cachePath);
+
+    // Filter outdated cache and convert to promises.
+    Object.keys(cacheOnDisk).forEach(key => {
+      if (!fs.existsSync(key)) {
+        return;
+      }
+      var record = cacheOnDisk[key];
+      var stat = fs.statSync(key);
+      if (stat.mtime.getTime() === record.metadata.mtime) {
+        ret[key] = Object.create(null);
+        ret[key].metadata = Object.create(null);
+        ret[key].data = Object.create(null);
+        ret[key].metadata.mtime = record.metadata.mtime;
+
+        Object.keys(record.data).forEach(field => {
+          ret[key].data[field] = Promise.resolve(record.data[field]);
+        });
+      }
+    });
+
+    return ret;
+  }
+}
+
+function loadCacheSync(cachePath) {
+  if (!fs.existsSync(cachePath)) {
+    return Object.create(null);
+  }
+
+  try {
+    return JSON.parse(fs.readFileSync(cachePath));
+  } catch (e) {
+    if (e instanceof SyntaxError) {
+      console.warn('Unable to parse cache file. Will clear and continue.');
+      try {
+        fs.unlinkSync(cachePath);
+      } catch (err) {
+        // Someone else might've deleted it.
+      }
+      return Object.create(null);
+    }
+    throw e;
+  }
+}
+
+module.exports = Cache;

react-packager/src/node-haste/DependencyGraph/DependencyGraphHelpers.js

@@ -0,0 +1,47 @@
+ /**
+ * 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.
+ */
+'use strict';
+
+const path = require('../fastpath');
+
+const NODE_MODULES = path.sep + 'node_modules' + path.sep;
+
+class DependencyGraphHelpers {
+  constructor({ providesModuleNodeModules, assetExts }) {
+    this._providesModuleNodeModules = providesModuleNodeModules;
+    this._assetExts = assetExts;
+  }
+
+  isNodeModulesDir(file) {
+    const index = file.lastIndexOf(NODE_MODULES);
+    if (index === -1) {
+      return false;
+    }
+
+    const parts = file.substr(index + 14).split(path.sep);
+    const dirs = this._providesModuleNodeModules;
+    for (let i = 0; i < dirs.length; i++) {
+      if (parts.indexOf(dirs[i]) > -1) {
+        return false;
+      }
+    }
+
+    return true;
+  }
+
+  isAssetFile(file) {
+    return this._assetExts.indexOf(this.extname(file)) !== -1;
+  }
+
+  extname(name) {
+    return path.extname(name).substr(1);
+  }
+}
+
+module.exports = DependencyGraphHelpers;

react-packager/src/node-haste/DependencyGraph/DeprecatedAssetMap.js

@@ -0,0 +1,120 @@
+ /**
+ * 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.
+ */
+'use strict';
+
+const AssetModule_DEPRECATED = require('../AssetModule_DEPRECATED');
+const Fastfs = require('../fastfs');
+const debug = require('debug')('ReactNativePackager:DependencyGraph');
+const path = require('../fastpath');
+
+class DeprecatedAssetMap {
+  constructor({
+    fsCrawl,
+    roots,
+    assetExts,
+    fileWatcher,
+    ignoreFilePath,
+    helpers,
+    activity,
+    enabled,
+    platforms,
+  }) {
+    if (roots == null || roots.length === 0 || !enabled) {
+      this._disabled = true;
+      return;
+    }
+
+    this._helpers = helpers;
+    this._map = Object.create(null);
+    this._assetExts = assetExts;
+    this._activity = activity;
+    this._platforms = platforms;
+
+    if (!this._disabled) {
+      this._fastfs = new Fastfs(
+        'Assets',
+        roots,
+        fileWatcher,
+        { ignore: ignoreFilePath, crawling: fsCrawl, activity }
+      );
+
+      this._fastfs.on('change', this._processFileChange.bind(this));
+    }
+  }
+
+  build() {
+    if (this._disabled) {
+      return Promise.resolve();
+    }
+
+    return this._fastfs.build().then(
+      () => {
+        const activity = this._activity;
+        let processAsset_DEPRECATEDActivity;
+        if (activity) {
+          processAsset_DEPRECATEDActivity = activity.startEvent(
+            'Building (deprecated) Asset Map',
+          );
+        }
+
+        this._fastfs.findFilesByExts(this._assetExts).forEach(
+          file => this._processAsset(file)
+        );
+
+        if (activity) {
+          activity.endEvent(processAsset_DEPRECATEDActivity);
+        }
+      }
+    );
+  }
+
+  resolve(fromModule, toModuleName) {
+    if (this._disabled) {
+      return null;
+    }
+
+    const assetMatch = toModuleName.match(/^image!(.+)/);
+    if (assetMatch && assetMatch[1]) {
+      if (!this._map[assetMatch[1]]) {
+        debug('WARINING: Cannot find asset:', assetMatch[1]);
+        return null;
+      }
+      return this._map[assetMatch[1]];
+    }
+  }
+
+  _processAsset(file) {
+    const ext = this._helpers.extname(file);
+    if (this._assetExts.indexOf(ext) !== -1) {
+      const name = assetName(file, ext);
+      if (this._map[name] != null) {
+        debug('Conflicting assets', name);
+      }
+
+      this._map[name] = new AssetModule_DEPRECATED({ file }, this._platforms);
+    }
+  }
+
+  _processFileChange(type, filePath, root, fstat) {
+    const name = assetName(filePath);
+    if (type === 'change' || type === 'delete') {
+      delete this._map[name];
+    }
+
+    if (type === 'change' || type === 'add') {
+      this._processAsset(path.join(root, filePath));
+    }
+  }
+}
+
+function assetName(file, ext) {
+  return path.basename(file, '.' + ext).replace(/@[\d\.]+x/, '');
+}
+
+module.exports = DeprecatedAssetMap;

react-packager/src/node-haste/DependencyGraph/HasteMap.js

@@ -0,0 +1,147 @@
+ /**
+ * 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.
+ */
+'use strict';
+const path = require('../fastpath');
+const getPlatformExtension = require('../lib/getPlatformExtension');
+
+const GENERIC_PLATFORM = 'generic';
+const NATIVE_PLATFORM = 'native';
+const PACKAGE_JSON = path.sep + 'package.json';
+
+class HasteMap {
+  constructor({
+    extensions,
+    fastfs,
+    moduleCache,
+    preferNativePlatform,
+    helpers,
+    platforms,
+  }) {
+    this._extensions = extensions;
+    this._fastfs = fastfs;
+    this._moduleCache = moduleCache;
+    this._preferNativePlatform = preferNativePlatform;
+    this._helpers = helpers;
+    this._platforms = platforms;
+  }
+
+  build() {
+    this._map = Object.create(null);
+    const promises = [];
+    this._fastfs.getAllFiles().forEach(filePath => {
+      if (!this._helpers.isNodeModulesDir(filePath)) {
+        if (this._extensions.indexOf(path.extname(filePath).substr(1)) !== -1) {
+          promises.push(this._processHasteModule(filePath));
+        }
+        if (filePath.endsWith(PACKAGE_JSON)) {
+          promises.push(this._processHastePackage(filePath));
+        }
+      }
+    });
+    return Promise.all(promises).then(() => this._map);
+  }
+
+  processFileChange(type, absPath) {
+    return Promise.resolve().then(() => {
+      /*eslint no-labels: 0 */
+      if (type === 'delete' || type === 'change') {
+        loop: for (const name in this._map) {
+          const modulesMap = this._map[name];
+          for (const platform in modulesMap) {
+            const module = modulesMap[platform];
+            if (module.path === absPath) {
+              delete modulesMap[platform];
+              break loop;
+            }
+          }
+        }
+
+        if (type === 'delete') {
+          return null;
+        }
+      }
+
+      if (this._extensions.indexOf(this._helpers.extname(absPath)) !== -1) {
+        if (path.basename(absPath) === 'package.json') {
+          return this._processHastePackage(absPath);
+        } else {
+          return this._processHasteModule(absPath);
+        }
+      }
+    });
+  }
+
+  getModule(name, platform = null) {
+    const modulesMap = this._map[name];
+    if (modulesMap == null) {
+      return null;
+    }
+
+    // If platform is 'ios', we prefer .ios.js to .native.js which we prefer to
+    // a plain .js file.
+    let module = undefined;
+    if (module == null && platform != null) {
+      module = modulesMap[platform];
+    }
+    if (module == null && this._preferNativePlatform) {
+      module = modulesMap[NATIVE_PLATFORM];
+    }
+    if (module == null) {
+      module = modulesMap[GENERIC_PLATFORM];
+    }
+    return module;
+  }
+
+  _processHasteModule(file) {
+    const module = this._moduleCache.getModule(file);
+    return module.isHaste().then(
+      isHaste => isHaste && module.getName()
+        .then(name => this._updateHasteMap(name, module))
+    );
+  }
+
+  _processHastePackage(file) {
+    file = path.resolve(file);
+    const p = this._moduleCache.getPackage(file);
+    return p.isHaste()
+      .then(isHaste => isHaste && p.getName()
+            .then(name => this._updateHasteMap(name, p)))
+      .catch(e => {
+        if (e instanceof SyntaxError) {
+          // Malformed package.json.
+          return;
+        }
+        throw e;
+      });
+  }
+
+  _updateHasteMap(name, mod) {
+    if (this._map[name] == null) {
+      this._map[name] = Object.create(null);
+    }
+
+    const moduleMap = this._map[name];
+    const modulePlatform = getPlatformExtension(mod.path, this._platforms) || GENERIC_PLATFORM;
+    const existingModule = moduleMap[modulePlatform];
+
+    if (existingModule && existingModule.path !== mod.path) {
+      throw new Error(
+        `@providesModule naming collision:\n` +
+        `  Duplicate module name: ${name}\n` +
+        `  Paths: ${mod.path} collides with ${existingModule.path}\n\n` +
+        `This error is caused by a @providesModule declaration ` +
+        `with the same name across two different files.`
+      );
+    }
+
+    moduleMap[modulePlatform] = mod;
+  }
+}
+
+module.exports = HasteMap;

react-packager/src/node-haste/DependencyGraph/ResolutionRequest.js

@@ -0,0 +1,529 @@
+ /**
+ * 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.
+ */
+'use strict';
+
+const AsyncTaskGroup = require('../lib/AsyncTaskGroup');
+const MapWithDefaults = require('../lib/MapWithDefaults');
+const debug = require('debug')('ReactNativePackager:DependencyGraph');
+const util = require('util');
+const path = require('../fastpath');
+const realPath = require('path');
+const isAbsolutePath = require('absolute-path');
+const getAssetDataFromName = require('../lib/getAssetDataFromName');
+
+class ResolutionRequest {
+  constructor({
+    platform,
+    platforms,
+    preferNativePlatform,
+    entryPath,
+    hasteMap,
+    deprecatedAssetMap,
+    helpers,
+    moduleCache,
+    fastfs,
+    shouldThrowOnUnresolvedErrors,
+    extraNodeModules,
+  }) {
+    this._platform = platform;
+    this._platforms = platforms;
+    this._preferNativePlatform = preferNativePlatform;
+    this._entryPath = entryPath;
+    this._hasteMap = hasteMap;
+    this._deprecatedAssetMap = deprecatedAssetMap;
+    this._helpers = helpers;
+    this._moduleCache = moduleCache;
+    this._fastfs = fastfs;
+    this._shouldThrowOnUnresolvedErrors = shouldThrowOnUnresolvedErrors;
+    this._extraNodeModules = extraNodeModules;
+    this._resetResolutionCache();
+  }
+
+  _tryResolve(action, secondaryAction) {
+    return action().catch((error) => {
+      if (error.type !== 'UnableToResolveError') {
+        throw error;
+      }
+      return secondaryAction();
+    });
+  }
+
+  resolveDependency(fromModule, toModuleName) {
+    const resHash = resolutionHash(fromModule.path, toModuleName);
+
+    if (this._immediateResolutionCache[resHash]) {
+      return Promise.resolve(this._immediateResolutionCache[resHash]);
+    }
+
+    const asset_DEPRECATED = this._deprecatedAssetMap.resolve(
+      fromModule,
+      toModuleName
+    );
+    if (asset_DEPRECATED) {
+      return Promise.resolve(asset_DEPRECATED);
+    }
+
+    const cacheResult = (result) => {
+      this._immediateResolutionCache[resHash] = result;
+      return result;
+    };
+
+    const forgive = (error) => {
+      if (
+        error.type !== 'UnableToResolveError' ||
+        this._shouldThrowOnUnresolvedErrors(this._entryPath, this._platform)
+      ) {
+        throw error;
+      }
+
+      debug(
+        'Unable to resolve module %s from %s',
+        toModuleName,
+        fromModule.path
+      );
+      return null;
+    };
+
+    if (!this._helpers.isNodeModulesDir(fromModule.path)
+        && !(isRelativeImport(toModuleName) || isAbsolutePath(toModuleName))) {
+      return this._tryResolve(
+        () => this._resolveHasteDependency(fromModule, toModuleName),
+        () => this._resolveNodeDependency(fromModule, toModuleName)
+      ).then(
+        cacheResult,
+        forgive,
+      );
+    }
+
+    return this._resolveNodeDependency(fromModule, toModuleName)
+      .then(
+        cacheResult,
+        forgive,
+      );
+  }
+
+  getOrderedDependencies({
+    response,
+    mocksPattern,
+    transformOptions,
+    onProgress,
+    recursive = true,
+  }) {
+    return this._getAllMocks(mocksPattern).then(allMocks => {
+      const entry = this._moduleCache.getModule(this._entryPath);
+      const mocks = Object.create(null);
+
+      response.pushDependency(entry);
+      let totalModules = 1;
+      let finishedModules = 0;
+
+      const resolveDependencies = module =>
+        module.getDependencies(transformOptions)
+          .then(dependencyNames =>
+            Promise.all(
+              dependencyNames.map(name => this.resolveDependency(module, name))
+            ).then(dependencies => [dependencyNames, dependencies])
+          );
+
+      const addMockDependencies = !allMocks
+        ? (module, result) => result
+        : (module, [dependencyNames, dependencies]) => {
+          const list = [module.getName()];
+          const pkg = module.getPackage();
+          if (pkg) {
+            list.push(pkg.getName());
+          }
+          return Promise.all(list).then(names => {
+            names.forEach(name => {
+              if (allMocks[name] && !mocks[name]) {
+                const mockModule = this._moduleCache.getModule(allMocks[name]);
+                dependencyNames.push(name);
+                dependencies.push(mockModule);
+                mocks[name] = allMocks[name];
+              }
+            });
+            return [dependencyNames, dependencies];
+          });
+        };
+
+      const collectedDependencies = new MapWithDefaults(module => collect(module));
+      const crawlDependencies = (mod, [depNames, dependencies]) => {
+        const filteredPairs = [];
+
+        dependencies.forEach((modDep, i) => {
+          const name = depNames[i];
+          if (modDep == null) {
+            // It is possible to require mocks that don't have a real
+            // module backing them. If a dependency cannot be found but there
+            // exists a mock with the desired ID, resolve it and add it as
+            // a dependency.
+            if (allMocks && allMocks[name] && !mocks[name]) {
+              const mockModule = this._moduleCache.getModule(allMocks[name]);
+              mocks[name] = allMocks[name];
+              return filteredPairs.push([name, mockModule]);
+            }
+
+            debug(
+              'WARNING: Cannot find required module `%s` from module `%s`',
+              name,
+              mod.path
+            );
+            return false;
+          }
+          return filteredPairs.push([name, modDep]);
+        });
+
+        response.setResolvedDependencyPairs(mod, filteredPairs);
+
+        const dependencyModules = filteredPairs.map(([, m]) => m);
+        const newDependencies =
+          dependencyModules.filter(m => !collectedDependencies.has(m));
+
+        if (onProgress) {
+          finishedModules += 1;
+          totalModules += newDependencies.length;
+          onProgress(finishedModules, totalModules);
+        }
+
+        if (recursive) {
+          // doesn't block the return of this function invocation, but defers
+          // the resulution of collectionsInProgress.done.then(…)
+          dependencyModules
+            .forEach(dependency => collectedDependencies.get(dependency));
+        }
+        return dependencyModules;
+      };
+
+      const collectionsInProgress = new AsyncTaskGroup();
+      function collect(module) {
+        collectionsInProgress.start(module);
+        const result = resolveDependencies(module)
+          .then(result => addMockDependencies(module, result))
+          .then(result => crawlDependencies(module, result));
+        const end = () => collectionsInProgress.end(module);
+        result.then(end, end);
+        return result;
+      }
+
+      return Promise.all([
+        // kicks off recursive dependency discovery, but doesn't block until it's done
+        collectedDependencies.get(entry),
+
+        // resolves when there are no more modules resolving dependencies
+        collectionsInProgress.done,
+      ]).then(([rootDependencies]) => {
+        return Promise.all(
+          Array.from(collectedDependencies, resolveKeyWithPromise)
+        ).then(moduleToDependenciesPairs =>
+          [rootDependencies, new MapWithDefaults(() => [], moduleToDependenciesPairs)]
+        );
+      }).then(([rootDependencies, moduleDependencies]) => {
+        // serialize dependencies, and make sure that every single one is only
+        // included once
+        const seen = new Set([entry]);
+        function traverse(dependencies) {
+          dependencies.forEach(dependency => {
+            if (seen.has(dependency)) { return; }
+
+            seen.add(dependency);
+            response.pushDependency(dependency);
+            traverse(moduleDependencies.get(dependency));
+          });
+        }
+
+        traverse(rootDependencies);
+        response.setMocks(mocks);
+      });
+    });
+  }
+
+  _getAllMocks(pattern) {
+    // Take all mocks in all the roots into account. This is necessary
+    // because currently mocks are global: any module can be mocked by
+    // any mock in the system.
+    let mocks = null;
+    if (pattern) {
+      mocks = Object.create(null);
+      this._fastfs.matchFilesByPattern(pattern).forEach(file =>
+        mocks[path.basename(file, path.extname(file))] = file
+      );
+    }
+    return Promise.resolve(mocks);
+  }
+
+  _resolveHasteDependency(fromModule, toModuleName) {
+    toModuleName = normalizePath(toModuleName);
+
+    let p = fromModule.getPackage();
+    if (p) {
+      p = p.redirectRequire(toModuleName);
+    } else {
+      p = Promise.resolve(toModuleName);
+    }
+
+    return p.then((realModuleName) => {
+      let dep = this._hasteMap.getModule(realModuleName, this._platform);
+      if (dep && dep.type === 'Module') {
+        return dep;
+      }
+
+      let packageName = realModuleName;
+      while (packageName && packageName !== '.') {
+        dep = this._hasteMap.getModule(packageName, this._platform);
+        if (dep && dep.type === 'Package') {
+          break;
+        }
+        packageName = path.dirname(packageName);
+      }
+
+      if (dep && dep.type === 'Package') {
+        const potentialModulePath = path.join(
+          dep.root,
+          path.relative(packageName, realModuleName)
+        );
+        return this._tryResolve(
+          () => this._loadAsFile(
+            potentialModulePath,
+            fromModule,
+            toModuleName,
+          ),
+          () => this._loadAsDir(potentialModulePath, fromModule, toModuleName),
+        );
+      }
+
+      throw new UnableToResolveError(
+        fromModule,
+        toModuleName,
+        'Unable to resolve dependency',
+      );
+    });
+  }
+
+  _redirectRequire(fromModule, modulePath) {
+    return Promise.resolve(fromModule.getPackage()).then(p => {
+      if (p) {
+        return p.redirectRequire(modulePath);
+      }
+      return modulePath;
+    });
+  }
+
+  _resolveFileOrDir(fromModule, toModuleName) {
+    const potentialModulePath = isAbsolutePath(toModuleName) ?
+        toModuleName :
+        path.join(path.dirname(fromModule.path), toModuleName);
+
+    return this._redirectRequire(fromModule, potentialModulePath).then(
+      realModuleName => {
+        if (realModuleName === false) {
+          return null;
+        }
+
+        return this._tryResolve(
+          () => this._loadAsFile(realModuleName, fromModule, toModuleName),
+          () => this._loadAsDir(realModuleName, fromModule, toModuleName)
+        );
+      }
+    );
+  }
+
+  _resolveNodeDependency(fromModule, toModuleName) {
+    if (isRelativeImport(toModuleName) || isAbsolutePath(toModuleName)) {
+      return this._resolveFileOrDir(fromModule, toModuleName);
+    } else {
+      return this._redirectRequire(fromModule, toModuleName).then(
+        realModuleName => {
+          // exclude
+          if (realModuleName === false) {
+            return null;
+          }
+
+          if (isRelativeImport(realModuleName) || isAbsolutePath(realModuleName)) {
+            // derive absolute path /.../node_modules/fromModuleDir/realModuleName
+            const fromModuleParentIdx = fromModule.path.lastIndexOf('node_modules/') + 13;
+            const fromModuleDir = fromModule.path.slice(0, fromModule.path.indexOf('/', fromModuleParentIdx));
+            const absPath = path.join(fromModuleDir, realModuleName);
+            return this._resolveFileOrDir(fromModule, absPath);
+          }
+
+          const searchQueue = [];
+          for (let currDir = path.dirname(fromModule.path);
+               currDir !== realPath.parse(fromModule.path).root;
+               currDir = path.dirname(currDir)) {
+            searchQueue.push(
+              path.join(currDir, 'node_modules', realModuleName)
+            );
+          }
+
+          if (this._extraNodeModules) {
+            const bits = toModuleName.split('/');
+            const packageName = bits[0];
+            if (this._extraNodeModules[packageName]) {
+              bits[0] = this._extraNodeModules[packageName];
+              searchQueue.push(path.join.apply(path, bits));
+            }
+          }
+
+          let p = Promise.reject(new UnableToResolveError(
+            fromModule,
+            toModuleName,
+            'Node module not found',
+          ));
+          searchQueue.forEach(potentialModulePath => {
+            p = this._tryResolve(
+              () => this._tryResolve(
+                () => p,
+                () => this._loadAsFile(potentialModulePath, fromModule, toModuleName),
+              ),
+              () => this._loadAsDir(potentialModulePath, fromModule, toModuleName)
+            );
+          });
+
+          return p;
+        });
+    }
+  }
+
+  _loadAsFile(potentialModulePath, fromModule, toModule) {
+    return Promise.resolve().then(() => {
+      if (this._helpers.isAssetFile(potentialModulePath)) {
+        const dirname = path.dirname(potentialModulePath);
+        if (!this._fastfs.dirExists(dirname)) {
+          throw new UnableToResolveError(
+            fromModule,
+            toModule,
+            `Directory ${dirname} doesn't exist`,
+          );
+        }
+
+        const {name, type} = getAssetDataFromName(potentialModulePath, this._platforms);
+
+        let pattern = '^' + name + '(@[\\d\\.]+x)?';
+        if (this._platform != null) {
+          pattern += '(\\.' + this._platform + ')?';
+        }
+        pattern += '\\.' + type;
+
+        // We arbitrarly grab the first one, because scale selection
+        // will happen somewhere
+        const [assetFile] = this._fastfs.matches(
+          dirname,
+          new RegExp(pattern)
+        );
+
+        if (assetFile) {
+          return this._moduleCache.getAssetModule(assetFile);
+        }
+      }
+
+      let file;
+      if (this._fastfs.fileExists(potentialModulePath)) {
+        file = potentialModulePath;
+      } else if (this._platform != null &&
+                 this._fastfs.fileExists(potentialModulePath + '.' + this._platform + '.js')) {
+        file = potentialModulePath + '.' + this._platform + '.js';
+      } else if (this._preferNativePlatform &&
+                 this._fastfs.fileExists(potentialModulePath + '.native.js')) {
+        file = potentialModulePath + '.native.js';
+      } else if (this._fastfs.fileExists(potentialModulePath + '.js')) {
+        file = potentialModulePath + '.js';
+      } else if (this._fastfs.fileExists(potentialModulePath + '.json')) {
+        file = potentialModulePath + '.json';
+      } else {
+        throw new UnableToResolveError(
+          fromModule,
+          toModule,
+          `File ${potentialModulePath} doesnt exist`,
+        );
+      }
+
+      return this._moduleCache.getModule(file);
+    });
+  }
+
+  _loadAsDir(potentialDirPath, fromModule, toModule) {
+    return Promise.resolve().then(() => {
+      if (!this._fastfs.dirExists(potentialDirPath)) {
+        throw new UnableToResolveError(
+          fromModule,
+          toModule,
+`Unable to find this module in its module map or any of the node_modules directories under ${potentialDirPath} and its parent directories
+
+This might be related to https://github.com/facebook/react-native/issues/4968
+To resolve try the following:
+  1. Clear watchman watches: \`watchman watch-del-all\`.
+  2. Delete the \`node_modules\` folder: \`rm -rf node_modules && npm install\`.
+  3. Reset packager cache: \`rm -fr $TMPDIR/react-*\` or \`npm start -- --reset-cache\`.`,
+        );
+      }
+
+      const packageJsonPath = path.join(potentialDirPath, 'package.json');
+      if (this._fastfs.fileExists(packageJsonPath)) {
+        return this._moduleCache.getPackage(packageJsonPath)
+          .getMain().then(
+            (main) => this._tryResolve(
+              () => this._loadAsFile(main, fromModule, toModule),
+              () => this._loadAsDir(main, fromModule, toModule)
+            )
+          );
+      }
+
+      return this._loadAsFile(
+        path.join(potentialDirPath, 'index'),
+        fromModule,
+        toModule,
+      );
+    });
+  }
+
+  _resetResolutionCache() {
+    this._immediateResolutionCache = Object.create(null);
+  }
+
+}
+
+
+function resolutionHash(modulePath, depName) {
+  return `${path.resolve(modulePath)}:${depName}`;
+}
+
+
+function UnableToResolveError(fromModule, toModule, message) {
+  Error.call(this);
+  Error.captureStackTrace(this, this.constructor);
+  this.message = util.format(
+    'Unable to resolve module %s from %s: %s',
+    toModule,
+    fromModule.path,
+    message,
+  );
+  this.type = this.name = 'UnableToResolveError';
+}
+
+util.inherits(UnableToResolveError, Error);
+
+function normalizePath(modulePath) {
+  if (path.sep === '/') {
+    modulePath = path.normalize(modulePath);
+  } else if (path.posix) {
+    modulePath = path.posix.normalize(modulePath);
+  }
+
+  return modulePath.replace(/\/$/, '');
+}
+
+function resolveKeyWithPromise([key, promise]) {
+  return promise.then(value => [key, value]);
+}
+
+function isRelativeImport(path) {
+  return /^[.][.]?[/]/.test(path);
+}
+
+module.exports = ResolutionRequest;

react-packager/src/node-haste/DependencyGraph/ResolutionResponse.js

@@ -0,0 +1,97 @@
+ /**
+ * 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.
+ */
+'use strict';
+
+class ResolutionResponse {
+  constructor({transformOptions}) {
+    this.transformOptions = transformOptions;
+    this.dependencies = [];
+    this.mainModuleId = null;
+    this.mocks = null;
+    this.numPrependedDependencies = 0;
+    this._mappings = Object.create(null);
+    this._finalized = false;
+  }
+
+  copy(properties) {
+    const {
+      dependencies = this.dependencies,
+      mainModuleId = this.mainModuleId,
+      mocks = this.mocks,
+    } = properties;
+
+    const numPrependedDependencies = dependencies === this.dependencies
+      ? this.numPrependedDependencies : 0;
+
+    return Object.assign(
+      new this.constructor({transformOptions: this.transformOptions}),
+      this,
+      {
+        dependencies,
+        mainModuleId,
+        mocks,
+        numPrependedDependencies,
+      },
+    );
+  }
+
+  _assertNotFinalized() {
+    if (this._finalized) {
+      throw new Error('Attempted to mutate finalized response.');
+    }
+  }
+
+  _assertFinalized() {
+    if (!this._finalized) {
+      throw new Error('Attempted to access unfinalized response.');
+    }
+  }
+
+  finalize() {
+    return this._mainModule.getName().then(id => {
+      this.mainModuleId = id;
+      this._finalized = true;
+      return this;
+    });
+  }
+
+  pushDependency(module) {
+    this._assertNotFinalized();
+    if (this.dependencies.length === 0) {
+      this._mainModule = module;
+    }
+
+    this.dependencies.push(module);
+  }
+
+  prependDependency(module) {
+    this._assertNotFinalized();
+    this.dependencies.unshift(module);
+    this.numPrependedDependencies += 1;
+  }
+
+  setResolvedDependencyPairs(module, pairs) {
+    this._assertNotFinalized();
+    const hash = module.hash();
+    if (this._mappings[hash] == null) {
+      this._mappings[hash] = pairs;
+    }
+  }
+
+  setMocks(mocks) {
+    this.mocks = mocks;
+  }
+
+  getResolvedDependencyPairs(module) {
+    this._assertFinalized();
+    return this._mappings[module.hash()];
+  }
+}
+
+module.exports = ResolutionResponse;

react-packager/src/node-haste/DependencyGraph/docblock.js

@@ -0,0 +1,83 @@
+/**
+ * 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.
+ */
+
+'use strict';
+
+var docblockRe = /^\s*(\/\*\*(.|\r?\n)*?\*\/)/;
+
+var ltrimRe = /^\s*/;
+/**
+ * @param {String} contents
+ * @return {String}
+ */
+function extract(contents) {
+  var match = contents.match(docblockRe);
+  if (match) {
+    return match[0].replace(ltrimRe, '') || '';
+  }
+  return '';
+}
+
+
+var commentStartRe = /^\/\*\*/;
+var commentEndRe = /\*\/$/;
+var wsRe = /[\t ]+/g;
+var stringStartRe = /(\r?\n|^) *\*/g;
+var multilineRe =
+      /(?:^|\r?\n) *(@[^\r\n]*?) *\r?\n *([^@\r\n\s][^@\r\n]+?) *\r?\n/g;
+var propertyRe = /(?:^|\r?\n) *@(\S+) *([^\r\n]*)/g;
+
+/**
+ * @param {String} contents
+ * @return {Array}
+ */
+function parse(docblock) {
+  docblock = docblock
+    .replace(commentStartRe, '')
+    .replace(commentEndRe, '')
+    .replace(wsRe, ' ')
+    .replace(stringStartRe, '$1');
+
+  // Normalize multi-line directives
+  var prev = '';
+  while (prev !== docblock) {
+    prev = docblock;
+    docblock = docblock.replace(multilineRe, '\n$1 $2\n');
+  }
+  docblock = docblock.trim();
+
+  var result = [];
+  var match;
+  while ((match = propertyRe.exec(docblock))) {
+    result.push([match[1], match[2]]);
+  }
+
+  return result;
+}
+
+/**
+ * Same as parse but returns an object of prop: value instead of array of paris
+ * If a property appers more than once the last one will be returned
+ *
+ * @param {String} contents
+ * @return {Object}
+ */
+function parseAsObject(docblock) {
+  var pairs = parse(docblock);
+  var result = {};
+  for (var i = 0; i < pairs.length; i++) {
+    result[pairs[i][0]] = pairs[i][1];
+  }
+  return result;
+}
+
+
+exports.extract = extract;
+exports.parse = parse;
+exports.parseAsObject = parseAsObject;

react-packager/src/node-haste/FileWatcher/__mocks__/sane.js

@@ -0,0 +1,14 @@
+/**
+ * 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.
+ */
+'use strict';
+
+module.exports = {
+  WatchmanWatcher: jest.genMockFromModule('sane/src/watchman_watcher'),
+  NodeWatcher: jest.genMockFromModule('sane/src/node_watcher'),
+};

react-packager/src/node-haste/FileWatcher/__tests__/FileWatcher-test.js

@@ -0,0 +1,74 @@
+/**
+ * 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.
+ */
+'use strict';
+
+jest
+  .dontMock('util')
+  .dontMock('events')
+  .dontMock('../')
+  .setMock('child_process', {
+    execSync: () => '/usr/bin/watchman',
+  });
+
+describe('FileWatcher', () => {
+  let WatchmanWatcher;
+  let FileWatcher;
+  let config;
+
+  beforeEach(() => {
+    const sane = require('sane');
+    WatchmanWatcher = sane.WatchmanWatcher;
+    WatchmanWatcher.prototype.once.mockImplementation(
+      (type, callback) => callback()
+    );
+
+    FileWatcher = require('../');
+
+    config = [{
+      dir: 'rootDir',
+      globs: [
+        '**/*.js',
+        '**/*.json',
+      ],
+    }];
+  });
+
+  pit('gets the watcher instance when ready', () => {
+    const fileWatcher = new FileWatcher(config);
+    return fileWatcher.getWatchers().then(watchers => {
+      watchers.forEach(watcher => {
+        expect(watcher instanceof WatchmanWatcher).toBe(true);
+      });
+    });
+  });
+
+  pit('emits events', () => {
+    let cb;
+    WatchmanWatcher.prototype.on.mockImplementation((type, callback) => {
+      cb = callback;
+    });
+    const fileWatcher = new FileWatcher(config);
+    const handler = jest.genMockFn();
+    fileWatcher.on('all', handler);
+    return fileWatcher.getWatchers().then(watchers => {
+      cb(1, 2, 3, 4);
+      jest.runAllTimers();
+      expect(handler.mock.calls[0]).toEqual([1, 2, 3, 4]);
+    });
+  });
+
+  pit('ends the watcher', () => {
+    const fileWatcher = new FileWatcher(config);
+    WatchmanWatcher.prototype.close.mockImplementation(callback => callback());
+
+    return fileWatcher.end().then(() => {
+      expect(WatchmanWatcher.prototype.close).toBeCalled();
+    });
+  });
+});

react-packager/src/node-haste/FileWatcher/index.js

@@ -0,0 +1,123 @@
+/**
+ * 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.
+ */
+'use strict';
+
+const EventEmitter  = require('events').EventEmitter;
+const denodeify = require('denodeify');
+const sane = require('sane');
+const execSync = require('child_process').execSync;
+
+const MAX_WAIT_TIME = 120000;
+
+const detectWatcherClass = () => {
+  try {
+    execSync('watchman version', {stdio: 'ignore'});
+    return sane.WatchmanWatcher;
+  } catch (e) {}
+  return sane.NodeWatcher;
+};
+
+const WatcherClass = detectWatcherClass();
+
+let inited = false;
+
+class FileWatcher extends EventEmitter {
+
+  constructor(rootConfigs) {
+    if (inited) {
+      throw new Error('FileWatcher can only be instantiated once');
+    }
+    inited = true;
+
+    super();
+    this._watcherByRoot = Object.create(null);
+
+    const watcherPromises = rootConfigs.map((rootConfig) => {
+      return this._createWatcher(rootConfig);
+    });
+
+    this._loading = Promise.all(watcherPromises).then(watchers => {
+      watchers.forEach((watcher, i) => {
+        this._watcherByRoot[rootConfigs[i].dir] = watcher;
+        watcher.on(
+          'all',
+          // args = (type, filePath, root, stat)
+          (...args) => this.emit('all', ...args)
+        );
+      });
+      return watchers;
+    });
+  }
+
+  getWatchers() {
+    return this._loading;
+  }
+
+  getWatcherForRoot(root) {
+    return this._loading.then(() => this._watcherByRoot[root]);
+  }
+
+  isWatchman() {
+    return Promise.resolve(FileWatcher.canUseWatchman());
+  }
+
+  end() {
+    inited = false;
+    return this._loading.then(
+      (watchers) => watchers.map(
+        watcher => denodeify(watcher.close).call(watcher)
+      )
+    );
+  }
+
+  _createWatcher(rootConfig) {
+    const watcher = new WatcherClass(rootConfig.dir, {
+      glob: rootConfig.globs,
+      dot: false,
+    });
+
+    return new Promise((resolve, reject) => {
+      const rejectTimeout = setTimeout(
+        () => reject(new Error(timeoutMessage(WatcherClass))),
+        MAX_WAIT_TIME
+      );
+
+      watcher.once('ready', () => {
+        clearTimeout(rejectTimeout);
+        resolve(watcher);
+      });
+    });
+  }
+
+  static createDummyWatcher() {
+    return Object.assign(new EventEmitter(), {
+      isWatchman: () => Promise.resolve(false),
+      end: () => Promise.resolve(),
+    });
+  }
+
+  static canUseWatchman() {
+    return WatcherClass == sane.WatchmanWatcher;
+  }
+}
+
+function timeoutMessage(Watcher) {
+  const lines = [
+    'Watcher took too long to load (' + Watcher.name + ')',
+  ];
+  if (Watcher === sane.WatchmanWatcher) {
+    lines.push(
+      'Try running `watchman version` from your terminal',
+      'https://facebook.github.io/watchman/docs/troubleshooting.html',
+    );
+  }
+  return lines.join('\n');
+}
+
+module.exports = FileWatcher;

react-packager/src/node-haste/Module.js

@@ -0,0 +1,232 @@
+/**
+ * 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.
+ */
+'use strict';
+
+const crypto = require('crypto');
+const docblock = require('./DependencyGraph/docblock');
+const isAbsolutePath = require('absolute-path');
+const jsonStableStringify = require('json-stable-stringify');
+const path = require('./fastpath');
+const extractRequires = require('./lib/extractRequires');
+
+class Module {
+
+  constructor({
+    file,
+    fastfs,
+    moduleCache,
+    cache,
+    extractor = extractRequires,
+    transformCode,
+    depGraphHelpers,
+    options,
+  }) {
+    if (!isAbsolutePath(file)) {
+      throw new Error('Expected file to be absolute path but got ' + file);
+    }
+
+    this.path = file;
+    this.type = 'Module';
+
+    this._fastfs = fastfs;
+    this._moduleCache = moduleCache;
+    this._cache = cache;
+    this._extractor = extractor;
+    this._transformCode = transformCode;
+    this._depGraphHelpers = depGraphHelpers;
+    this._options = options;
+  }
+
+  isHaste() {
+    return this._cache.get(
+      this.path,
+      'isHaste',
+      () => this._readDocBlock().then(({id}) => !!id)
+    );
+  }
+
+  getCode(transformOptions) {
+    return this.read(transformOptions).then(({code}) => code);
+  }
+
+  getMap(transformOptions) {
+    return this.read(transformOptions).then(({map}) => map);
+  }
+
+  getName() {
+    return this._cache.get(
+      this.path,
+      'name',
+      () => this._readDocBlock().then(({id}) => {
+        if (id) {
+          return id;
+        }
+
+        const p = this.getPackage();
+
+        if (!p) {
+          // Name is full path
+          return this.path;
+        }
+
+        return p.getName()
+          .then(name => {
+            if (!name) {
+              return this.path;
+            }
+
+            return path.join(name, path.relative(p.root, this.path)).replace(/\\/g, '/');
+          });
+      })
+    );
+  }
+
+  getPackage() {
+    return this._moduleCache.getPackageForModule(this);
+  }
+
+  getDependencies(transformOptions) {
+    return this.read(transformOptions).then(({dependencies}) => dependencies);
+  }
+
+  invalidate() {
+    this._cache.invalidate(this.path);
+  }
+
+  _parseDocBlock(docBlock) {
+    // Extract an id for the module if it's using @providesModule syntax
+    // and if it's NOT in node_modules (and not a whitelisted node_module).
+    // This handles the case where a project may have a dep that has @providesModule
+    // docblock comments, but doesn't want it to conflict with whitelisted @providesModule
+    // modules, such as react-haste, fbjs-haste, or react-native or with non-dependency,
+    // project-specific code that is using @providesModule.
+    const moduleDocBlock = docblock.parseAsObject(docBlock);
+    const provides = moduleDocBlock.providesModule || moduleDocBlock.provides;
+
+    const id = provides && !this._depGraphHelpers.isNodeModulesDir(this.path)
+        ? /^\S+/.exec(provides)[0]
+        : undefined;
+    return {id, moduleDocBlock};
+  }
+
+  _readDocBlock(contentPromise) {
+    if (!this._docBlock) {
+      if (!contentPromise) {
+        contentPromise = this._fastfs.readWhile(this.path, whileInDocBlock);
+      }
+      this._docBlock = contentPromise
+        .then(docBlock => this._parseDocBlock(docBlock));
+    }
+    return this._docBlock;
+  }
+
+  read(transformOptions) {
+    return this._cache.get(
+      this.path,
+      cacheKey('moduleData', transformOptions),
+      () => {
+        const fileContentPromise = this._fastfs.readFile(this.path);
+        return Promise.all([
+          fileContentPromise,
+          this._readDocBlock(fileContentPromise),
+        ]).then(([source, {id, moduleDocBlock}]) => {
+          // Ignore requires in JSON files or generated code. An example of this
+          // is prebuilt files like the SourceMap library.
+          const extern = this.isJSON() || 'extern' in moduleDocBlock;
+          if (extern) {
+            transformOptions = {...transformOptions, extern};
+          }
+          const transformCode = this._transformCode;
+          const codePromise = transformCode
+              ? transformCode(this, source, transformOptions)
+              : Promise.resolve({code: source});
+          return codePromise.then(result => {
+            const {
+              code,
+              dependencies = extern ? [] : this._extractor(code).deps.sync,
+            } = result;
+            if (this._options && this._options.cacheTransformResults === false) {
+              return {dependencies};
+            } else {
+              return {...result, dependencies, id, source};
+            }
+          });
+        });
+      }
+    );
+  }
+
+  hash() {
+    return `Module : ${this.path}`;
+  }
+
+  isJSON() {
+    return path.extname(this.path) === '.json';
+  }
+
+  isAsset() {
+    return false;
+  }
+
+  isPolyfill() {
+    return false;
+  }
+
+  isAsset_DEPRECATED() {
+    return false;
+  }
+
+  toJSON() {
+    return {
+      hash: this.hash(),
+      isJSON: this.isJSON(),
+      isAsset: this.isAsset(),
+      isAsset_DEPRECATED: this.isAsset_DEPRECATED(),
+      type: this.type,
+      path: this.path,
+    };
+  }
+}
+
+function whileInDocBlock(chunk, i, result) {
+  // consume leading whitespace
+  if (!/\S/.test(result)) {
+    return true;
+  }
+
+  // check for start of doc block
+  if (!/^\s*\/(\*{2}|\*?$)/.test(result)) {
+    return false;
+  }
+
+  // check for end of doc block
+  return !/\*\//.test(result);
+}
+
+// use weak map to speed up hash creation of known objects
+const knownHashes = new WeakMap();
+function stableObjectHash(object) {
+  let digest = knownHashes.get(object);
+  if (!digest) {
+    digest = crypto.createHash('md5')
+      .update(jsonStableStringify(object))
+      .digest('base64');
+    knownHashes.set(object, digest);
+  }
+
+  return digest;
+}
+
+function cacheKey(field, transformOptions) {
+  return transformOptions !== undefined
+      ? stableObjectHash(transformOptions) + '\0' + field
+      : field;
+}
+
+module.exports = Module;

react-packager/src/node-haste/ModuleCache.js

@@ -0,0 +1,123 @@
+'use strict';
+
+const AssetModule = require('./AssetModule');
+const Package = require('./Package');
+const Module = require('./Module');
+const Polyfill = require('./Polyfill');
+const path = require('./fastpath');
+
+class ModuleCache {
+
+  constructor({
+    fastfs,
+    cache,
+    extractRequires,
+    transformCode,
+    depGraphHelpers,
+    assetDependencies,
+    moduleOptions,
+  }, platforms) {
+    this._moduleCache = Object.create(null);
+    this._packageCache = Object.create(null);
+    this._fastfs = fastfs;
+    this._cache = cache;
+    this._extractRequires = extractRequires;
+    this._transformCode = transformCode;
+    this._depGraphHelpers = depGraphHelpers;
+    this._platforms = platforms;
+    this._assetDependencies = assetDependencies;
+    this._moduleOptions = moduleOptions;
+    this._packageModuleMap = new WeakMap();
+
+    fastfs.on('change', this._processFileChange.bind(this));
+  }
+
+  getModule(filePath) {
+    if (!this._moduleCache[filePath]) {
+      this._moduleCache[filePath] = new Module({
+        file: filePath,
+        fastfs: this._fastfs,
+        moduleCache: this,
+        cache: this._cache,
+        extractor: this._extractRequires,
+        transformCode: this._transformCode,
+        depGraphHelpers: this._depGraphHelpers,
+        options: this._moduleOptions,
+      });
+    }
+    return this._moduleCache[filePath];
+  }
+
+  getAllModules() {
+    return this._moduleCache;
+  }
+
+  getAssetModule(filePath) {
+    if (!this._moduleCache[filePath]) {
+      this._moduleCache[filePath] = new AssetModule({
+        file: filePath,
+        fastfs: this._fastfs,
+        moduleCache: this,
+        cache: this._cache,
+        dependencies: this._assetDependencies,
+      }, this._platforms);
+    }
+    return this._moduleCache[filePath];
+  }
+
+  getPackage(filePath) {
+    if (!this._packageCache[filePath]) {
+      this._packageCache[filePath] = new Package({
+        file: filePath,
+        fastfs: this._fastfs,
+        cache: this._cache,
+      });
+    }
+    return this._packageCache[filePath];
+  }
+
+  getPackageForModule(module) {
+    if (this._packageModuleMap.has(module)) {
+      const packagePath = this._packageModuleMap.get(module);
+      if (this._packageCache[packagePath]) {
+        return this._packageCache[packagePath];
+      } else {
+        this._packageModuleMap.delete(module);
+      }
+    }
+
+    const packagePath = this._fastfs.closest(module.path, 'package.json');
+    if (!packagePath) {
+      return null;
+    }
+
+    this._packageModuleMap.set(module, packagePath);
+    return this.getPackage(packagePath);
+  }
+
+  createPolyfill({file}) {
+    return new Polyfill({
+      file,
+      cache: this._cache,
+      depGraphHelpers: this._depGraphHelpers,
+      fastfs: this._fastfs,
+      moduleCache: this,
+      transformCode: this._transformCode,
+    });
+  }
+
+  _processFileChange(type, filePath, root) {
+    const absPath = path.join(root, filePath);
+
+    if (this._moduleCache[absPath]) {
+      this._moduleCache[absPath].invalidate();
+      delete this._moduleCache[absPath];
+    }
+    if (this._packageCache[absPath]) {
+      this._packageCache[absPath].invalidate();
+      delete this._packageCache[absPath];
+    }
+  }
+}
+
+module.exports = ModuleCache;

react-packager/src/node-haste/Package.js

@@ -0,0 +1,134 @@
+'use strict';
+
+const isAbsolutePath = require('absolute-path');
+const path = require('./fastpath');
+
+class Package {
+
+  constructor({ file, fastfs, cache }) {
+    this.path = path.resolve(file);
+    this.root = path.dirname(this.path);
+    this._fastfs = fastfs;
+    this.type = 'Package';
+    this._cache = cache;
+  }
+
+  getMain() {
+    return this.read().then(json => {
+      var replacements = getReplacements(json);
+      if (typeof replacements === 'string') {
+        return path.join(this.root, replacements);
+      }
+
+      let main = json.main || 'index';
+
+      if (replacements && typeof replacements === 'object') {
+        main = replacements[main] ||
+          replacements[main + '.js'] ||
+          replacements[main + '.json'] ||
+          replacements[main.replace(/(\.js|\.json)$/, '')] ||
+          main;
+      }
+
+      return path.join(this.root, main);
+    });
+  }
+
+  isHaste() {
+    return this._cache.get(this.path, 'package-haste', () =>
+      this.read().then(json => !!json.name)
+    );
+  }
+
+  getName() {
+    return this._cache.get(this.path, 'package-name', () =>
+      this.read().then(json => json.name)
+    );
+  }
+
+  invalidate() {
+    this._cache.invalidate(this.path);
+  }
+
+  redirectRequire(name) {
+    return this.read().then(json => {
+      var replacements = getReplacements(json);
+
+      if (!replacements || typeof replacements !== 'object') {
+        return name;
+      }
+
+      if (name[0] !== '/') {
+        const replacement = replacements[name];
+        // support exclude with "someDependency": false
+        return replacement === false
+          ? false
+          : replacement || name;
+      }
+
+      if (!isAbsolutePath(name)) {
+        throw new Error(`Expected ${name} to be absolute path`);
+      }
+
+      const relPath = './' + path.relative(this.root, name);
+      let redirect = replacements[relPath];
+
+      // false is a valid value
+      if (redirect == null) {
+        redirect = replacements[relPath + '.js'];
+        if (redirect == null) {
+          redirect = replacements[relPath + '.json'];
+        }
+      }
+
+      // support exclude with "./someFile": false
+      if (redirect === false) {
+        return false;
+      }
+
+      if (redirect) {
+        return path.join(
+          this.root,
+          redirect
+        );
+      }
+
+      return name;
+    });
+  }
+
+  read() {
+    if (!this._reading) {
+      this._reading = this._fastfs.readFile(this.path)
+        .then(jsonStr => JSON.parse(jsonStr));
+    }
+
+    return this._reading;
+  }
+}
+
+function getReplacements(pkg) {
+  let rn = pkg['react-native'];
+  let browser = pkg.browser;
+  if (rn == null) {
+    return browser;
+  }
+
+  if (browser == null) {
+    return rn;
+  }
+
+  if (typeof rn === 'string') {
+    rn = { [pkg.main]: rn };
+  }
+
+  if (typeof browser === 'string') {
+    browser = { [pkg.main]: browser };
+  }
+
+  // merge with "browser" as default,
+  // "react-native" as override
+  return { ...browser, ...rn };
+}
+
+module.exports = Package;

react-packager/src/node-haste/Polyfill.js

@@ -0,0 +1,37 @@
+'use strict';
+
+const Module = require('./Module');
+
+class Polyfill extends Module {
+  constructor(options) {
+    super(options);
+    this._id = options.id;
+    this._dependencies = options.dependencies;
+  }
+
+  isHaste() {
+    return Promise.resolve(false);
+  }
+
+  getName() {
+    return Promise.resolve(this._id);
+  }
+
+  getPackage() {
+    return null;
+  }
+
+  getDependencies() {
+    return Promise.resolve(this._dependencies);
+  }
+
+  isJSON() {
+    return false;
+  }
+
+  isPolyfill() {
+    return true;
+  }
+}
+
+module.exports = Polyfill;

react-packager/src/node-haste/__mocks__/debug.js

@@ -0,0 +1,11 @@
+/**
+ * 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.
+ */
+'use strict';
+
+module.exports = () => () => {};

react-packager/src/node-haste/__mocks__/fs.js

@@ -0,0 +1,11 @@
+/**
+ * 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.
+ */
+'use strict';
+
+module.exports = require('graceful-fs');

react-packager/src/node-haste/__mocks__/graceful-fs.js

@@ -0,0 +1,211 @@
+/**
+ * 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.
+ */
+'use strict';
+
+const fs = jest.genMockFromModule('fs');
+const noop = () => {};
+
+function asyncCallback(cb) {
+  return function() {
+    setImmediate(() => cb.apply(this, arguments));
+  };
+}
+
+const mtime = {
+  getTime: () => Math.ceil(Math.random() * 10000000),
+};
+
+fs.realpath.mockImpl((filepath, callback) => {
+  callback = asyncCallback(callback);
+  let node;
+  try {
+    node = getToNode(filepath);
+  } catch (e) {
+    return callback(e);
+  }
+  if (node && typeof node === 'object' && node.SYMLINK != null) {
+    return callback(null, node.SYMLINK);
+  }
+  callback(null, filepath);
+});
+
+fs.readdirSync.mockImpl((filepath) => Object.keys(getToNode(filepath)));
+
+fs.readdir.mockImpl((filepath, callback) => {
+  callback = asyncCallback(callback);
+  let node;
+  try {
+    node = getToNode(filepath);
+    if (node && typeof node === 'object' && node.SYMLINK != null) {
+      node = getToNode(node.SYMLINK);
+    }
+  } catch (e) {
+    return callback(e);
+  }
+
+  if (!(node && typeof node === 'object' && node.SYMLINK == null)) {
+    return callback(new Error(filepath + ' is not a directory.'));
+  }
+
+  callback(null, Object.keys(node));
+});
+
+fs.readFile.mockImpl(function(filepath, encoding, callback) {
+  callback = asyncCallback(callback);
+  if (arguments.length === 2) {
+    callback = encoding;
+    encoding = null;
+  }
+
+  let node;
+  try {
+    node = getToNode(filepath);
+    // dir check
+    if (node && typeof node === 'object' && node.SYMLINK == null) {
+      callback(new Error('Error readFile a dir: ' + filepath));
+    }
+    return callback(null, node);
+  } catch (e) {
+    return callback(e);
+  }
+});
+
+fs.stat.mockImpl((filepath, callback) => {
+  callback = asyncCallback(callback);
+  let node;
+  try {
+    node = getToNode(filepath);
+  } catch (e) {
+    callback(e);
+    return;
+  }
+
+  if (node.SYMLINK) {
+    fs.stat(node.SYMLINK, callback);
+    return;
+  }
+
+  if (node && typeof node === 'object') {
+    callback(null, {
+      isDirectory: () => true,
+      isSymbolicLink: () => false,
+      mtime,
+    });
+  } else {
+    callback(null, {
+      isDirectory: () => false,
+      isSymbolicLink: () => false,
+      mtime,
+    });
+  }
+});
+
+fs.statSync.mockImpl((filepath) => {
+  const node = getToNode(filepath);
+
+  if (node.SYMLINK) {
+    return fs.statSync(node.SYMLINK);
+  }
+
+  return {
+    isDirectory: () => node && typeof node === 'object',
+    isSymbolicLink: () => false,
+    mtime,
+  };
+});
+
+fs.lstatSync.mockImpl((filepath) => {
+  const node = getToNode(filepath);
+
+  if (node.SYMLINK) {
+    return {
+      isDirectory: () => false,
+      isSymbolicLink: () => true,
+      mtime,
+    };
+  }
+
+  return {
+    isDirectory: () => node && typeof node === 'object',
+    isSymbolicLink: () => false,
+    mtime,
+  };
+});
+
+fs.open.mockImpl(function(path) {
+  const callback = arguments[arguments.length - 1] || noop;
+  let data, error, fd;
+  try {
+    data = getToNode(path);
+  } catch (e) {
+    error = e;
+  }
+
+  if (error || data == null) {
+    error = Error(`ENOENT: no such file or directory, open ${path}`);
+  }
+  if (data != null) {
+    /* global Buffer: true */
+    fd = {buffer: new Buffer(data, 'utf8'), position: 0};
+  }
+
+  callback(error, fd);
+});
+
+fs.read.mockImpl((fd, buffer, writeOffset, length, position, callback = noop) => {
+  let bytesWritten;
+  try {
+    if (position == null || position < 0) {
+      ({position} = fd);
+    }
+    bytesWritten = fd.buffer.copy(buffer, writeOffset, position, position + length);
+    fd.position = position + bytesWritten;
+  } catch (e) {
+    callback(Error('invalid argument'));
+    return;
+  }
+  callback(null, bytesWritten, buffer);
+});
+
+fs.close.mockImpl((fd, callback = noop) => {
+  try {
+    fd.buffer = fs.position = undefined;
+  } catch (e) {
+    callback(Error('invalid argument'));
+    return;
+  }
+  callback(null);
+});
+
+let filesystem;
+
+fs.__setMockFilesystem = (object) => filesystem = object;
+
+function getToNode(filepath) {
+  // Ignore the drive for Windows paths.
+  if (filepath.match(/^[a-zA-Z]:\\/)) {
+    filepath = filepath.substring(2);
+  }
+
+  const parts = filepath.split(/[\/\\]/);
+  if (parts[0] !== '') {
+    throw new Error('Make sure all paths are absolute.');
+  }
+  let node = filesystem;
+  parts.slice(1).forEach((part) => {
+    if (node && node.SYMLINK) {
+      node = getToNode(node.SYMLINK);
+    }
+    node = node[part];
+  });
+
+  return node;
+}
+
+module.exports = fs;

react-packager/src/node-haste/__tests__/AssetModule-test.js

@@ -0,0 +1,28 @@
+/**
+ * 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.
+ */
+'use strict';
+
+jest.autoMockOff();
+
+const AssetModule = require('../AssetModule');
+
+describe('AssetModule:', () => {
+  const defaults = {file: '/arbitrary'};
+
+  pit('has no dependencies by default', () => {
+    return new AssetModule(defaults).getDependencies()
+      .then(deps => expect(deps).toEqual([]));
+  });
+
+  pit('can be parametrized with dependencies', () => {
+    const dependencies = ['arbitrary', 'dependencies'];
+    return new AssetModule({...defaults, dependencies}).getDependencies()
+      .then(deps => expect(deps).toEqual(dependencies));
+  });
+});

react-packager/src/node-haste/__tests__/Module-test.js

@@ -0,0 +1,502 @@
+/**
+ * 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.
+ */
+'use strict';
+
+jest
+  .dontMock('absolute-path')
+  .dontMock('json-stable-stringify')
+  .dontMock('../fastfs')
+  .dontMock('../lib/extractRequires')
+  .dontMock('../lib/replacePatterns')
+  .dontMock('../DependencyGraph/docblock')
+  .dontMock('../Module');
+
+jest
+  .mock('fs');
+
+const Fastfs = require('../fastfs');
+const Module = require('../Module');
+const ModuleCache = require('../ModuleCache');
+const DependencyGraphHelpers = require('../DependencyGraph/DependencyGraphHelpers');
+const fs = require('graceful-fs');
+
+const packageJson =
+  JSON.stringify({
+    name: 'arbitrary',
+    version: '1.0.0',
+    description: "A require('foo') story",
+  });
+
+function mockFS(rootChildren) {
+  fs.__setMockFilesystem({root: rootChildren});
+}
+
+function mockPackageFile() {
+  mockFS({'package.json': packageJson});
+}
+
+function mockIndexFile(indexJs) {
+  mockFS({'index.js': indexJs});
+}
+
+describe('Module', () => {
+  const fileWatcher = {
+    on: () =>  this,
+    isWatchman: () => Promise.resolve(false),
+  };
+  const fileName = '/root/index.js';
+
+  let cache, fastfs;
+
+  const createCache = () => ({
+    get: jest.genMockFn().mockImplementation(
+      (filepath, field, cb) => cb(filepath)
+    ),
+    invalidate: jest.genMockFn(),
+    end: jest.genMockFn(),
+  });
+
+  const createModule = (options) =>
+    new Module({
+      options: {
+        cacheTransformResults: true,
+      },
+      ...options,
+      cache,
+      fastfs,
+      file: options && options.file || fileName,
+      depGraphHelpers: new DependencyGraphHelpers(),
+      moduleCache: new ModuleCache({fastfs, cache}),
+    });
+
+  const createJSONModule =
+    (options) => createModule({...options, file: '/root/package.json'});
+
+  beforeEach(function(done) {
+    process.platform = 'linux';
+    cache = createCache();
+    fastfs = new Fastfs(
+      'test',
+      ['/root'],
+      fileWatcher,
+      {crawling: Promise.resolve([fileName, '/root/package.json']), ignore: []},
+    );
+
+    fastfs.build().then(done);
+  });
+
+  describe('Module ID', () => {
+    const moduleId = 'arbitraryModule';
+    const source =
+    `/**
+       * @providesModule ${moduleId}
+       */
+    `;
+
+    let module;
+    beforeEach(() => {
+      module = createModule();
+    });
+
+    describe('@providesModule annotations', () => {
+      beforeEach(() => {
+        mockIndexFile(source);
+      });
+
+      pit('extracts the module name from the header', () =>
+        module.getName().then(name => expect(name).toEqual(moduleId))
+      );
+
+      pit('identifies the module as haste module', () =>
+        module.isHaste().then(isHaste => expect(isHaste).toBe(true))
+      );
+
+      pit('does not transform the file in order to access the name', () => {
+        const transformCode =
+          jest.genMockFn().mockReturnValue(Promise.resolve());
+        return createModule({transformCode}).getName()
+          .then(() => expect(transformCode).not.toBeCalled());
+      });
+
+      pit('does not transform the file in order to access the haste status', () => {
+        const transformCode =
+          jest.genMockFn().mockReturnValue(Promise.resolve());
+        return createModule({transformCode}).isHaste()
+          .then(() => expect(transformCode).not.toBeCalled());
+      });
+    });
+
+    describe('@provides annotations', () => {
+      beforeEach(() => {
+        mockIndexFile(source.replace(/@providesModule/, '@provides'));
+      });
+
+      pit('extracts the module name from the header if it has a @provides annotation', () =>
+        module.getName().then(name => expect(name).toEqual(moduleId))
+      );
+
+      pit('identifies the module as haste module', () =>
+        module.isHaste().then(isHaste => expect(isHaste).toBe(true))
+      );
+
+      pit('does not transform the file in order to access the name', () => {
+        const transformCode =
+          jest.genMockFn().mockReturnValue(Promise.resolve());
+        return createModule({transformCode}).getName()
+          .then(() => expect(transformCode).not.toBeCalled());
+      });
+
+      pit('does not transform the file in order to access the haste status', () => {
+        const transformCode =
+          jest.genMockFn().mockReturnValue(Promise.resolve());
+        return createModule({transformCode}).isHaste()
+          .then(() => expect(transformCode).not.toBeCalled());
+      });
+    });
+
+    describe('no annotation', () => {
+      beforeEach(() => {
+        mockIndexFile('arbitrary(code);');
+      });
+
+      pit('uses the file name as module name', () =>
+        module.getName().then(name => expect(name).toEqual(fileName))
+      );
+
+      pit('does not identify the module as haste module', () =>
+        module.isHaste().then(isHaste => expect(isHaste).toBe(false))
+      );
+
+      pit('does not transform the file in order to access the name', () => {
+        const transformCode =
+          jest.genMockFn().mockReturnValue(Promise.resolve());
+        return createModule({transformCode}).getName()
+          .then(() => expect(transformCode).not.toBeCalled());
+      });
+
+      pit('does not transform the file in order to access the haste status', () => {
+        const transformCode =
+          jest.genMockFn().mockReturnValue(Promise.resolve());
+        return createModule({transformCode}).isHaste()
+          .then(() => expect(transformCode).not.toBeCalled());
+      });
+    });
+  });
+
+  describe('Code', () => {
+    const fileContents = 'arbitrary(code)';
+    beforeEach(function() {
+      mockIndexFile(fileContents);
+    });
+
+    pit('exposes file contents as `code` property on the data exposed by `read()`', () =>
+      createModule().read().then(({code}) =>
+        expect(code).toBe(fileContents))
+    );
+
+    pit('exposes file contents via the `getCode()` method', () =>
+      createModule().getCode().then(code =>
+        expect(code).toBe(fileContents))
+    );
+  });
+
+  describe('Extractors', () => {
+
+    pit('uses custom require extractors if specified', () => {
+      mockIndexFile('');
+      const module = createModule({
+        extractor: code => ({deps: {sync: ['foo', 'bar']}}),
+      });
+
+      return module.getDependencies().then(actual =>
+        expect(actual).toEqual(['foo', 'bar']));
+    });
+
+    pit('uses a default extractor to extract dependencies', () => {
+      mockIndexFile(`
+        require('dependency-a');
+        import * as b from "dependency-b";
+        export {something} from 'dependency-c';
+      `);
+
+      const module = createModule();
+      return module.getDependencies().then(dependencies =>
+        expect(dependencies.sort())
+          .toEqual(['dependency-a', 'dependency-b', 'dependency-c'])
+      );
+    });
+
+    pit('does not extract dependencies from files annotated with @extern', () => {
+      mockIndexFile(`
+        /**
+         * @extern
+         */
+        require('dependency-a');
+        import * as b from "dependency-b";
+        export {something} from 'dependency-c';
+      `);
+
+      const module = createModule();
+      return module.getDependencies().then(dependencies =>
+        expect(dependencies).toEqual([])
+      );
+    });
+
+    pit('does not extract dependencies from JSON files', () => {
+      mockPackageFile();
+      const module = createJSONModule();
+      return module.getDependencies().then(dependencies =>
+        expect(dependencies).toEqual([])
+      );
+    });
+  });
+
+  describe('Custom Code Transform', () => {
+    let transformCode;
+    const fileContents = 'arbitrary(code);';
+    const exampleCode = `
+      ${'require'}('a');
+      ${'System.import'}('b');
+      ${'require'}('c');`;
+
+    beforeEach(function() {
+      transformCode = jest.genMockFn();
+      mockIndexFile(fileContents);
+      transformCode.mockReturnValue(Promise.resolve({code: ''}));
+    });
+
+    pit('passes the module and file contents to the transform function when reading', () => {
+      const module = createModule({transformCode});
+      return module.read()
+        .then(() => {
+          expect(transformCode).toBeCalledWith(module, fileContents, undefined);
+        });
+    });
+
+    pit('passes any additional options to the transform function when reading', () => {
+      const module = createModule({transformCode});
+      const transformOptions = {arbitrary: Object()};
+      return module.read(transformOptions)
+        .then(() =>
+          expect(transformCode.mock.calls[0][2]).toBe(transformOptions)
+        );
+    });
+
+    pit('passes the module and file contents to the transform if the file is annotated with @extern', () => {
+      const module = createModule({transformCode});
+      const fileContents = `
+        /**
+         * @extern
+         */
+      `;
+      mockIndexFile(fileContents);
+      return module.read().then(() => {
+        expect(transformCode).toBeCalledWith(module, fileContents, {extern: true});
+      });
+    });
+
+    pit('passes the module and file contents to the transform for JSON files', () => {
+      mockPackageFile();
+      const module = createJSONModule({transformCode});
+      return module.read().then(() => {
+        expect(transformCode).toBeCalledWith(module, packageJson, {extern: true});
+      });
+    });
+
+    pit('does not extend the passed options object if the file is annotated with @extern', () => {
+      const module = createModule({transformCode});
+      const fileContents = `
+        /**
+         * @extern
+         */
+      `;
+      mockIndexFile(fileContents);
+      const options = {arbitrary: 'foo'};
+      return module.read(options).then(() => {
+        expect(options).not.toEqual(jasmine.objectContaining({extern: true}));
+        expect(transformCode)
+          .toBeCalledWith(module, fileContents, {...options, extern: true});
+      });
+    });
+
+    pit('does not extend the passed options object for JSON files', () => {
+      mockPackageFile();
+      const module = createJSONModule({transformCode});
+      const options = {arbitrary: 'foo'};
+      return module.read(options).then(() => {
+        expect(options).not.toEqual(jasmine.objectContaining({extern: true}));
+        expect(transformCode)
+          .toBeCalledWith(module, packageJson, {...options, extern: true});
+      });
+    });
+
+    pit('uses the code that `transformCode` resolves to to extract dependencies', () => {
+      transformCode.mockReturnValue(Promise.resolve({code: exampleCode}));
+      const module = createModule({transformCode});
+
+      return module.getDependencies().then(dependencies => {
+        expect(dependencies).toEqual(['a', 'c']);
+      });
+    });
+
+    pit('uses dependencies that `transformCode` resolves to, instead of extracting them', () => {
+      const mockedDependencies = ['foo', 'bar'];
+      transformCode.mockReturnValue(Promise.resolve({
+        code: exampleCode,
+        dependencies: mockedDependencies,
+      }));
+      const module = createModule({transformCode});
+
+      return module.getDependencies().then(dependencies => {
+        expect(dependencies).toEqual(mockedDependencies);
+      });
+    });
+
+    pit('forwards all additional properties of the result provided by `transformCode`', () => {
+      const mockedResult = {
+        code: exampleCode,
+        arbitrary: 'arbitrary',
+        dependencyOffsets: [12, 764],
+        map: {version: 3},
+        subObject: {foo: 'bar'},
+      };
+      transformCode.mockReturnValue(Promise.resolve(mockedResult));
+      const module = createModule({transformCode});
+
+      return module.read().then((result) => {
+        expect(result).toEqual(jasmine.objectContaining(mockedResult));
+      });
+    });
+
+    pit('does not store anything but dependencies if the `cacheTransformResults` option is disabled', () => {
+      const mockedResult = {
+        code: exampleCode,
+        arbitrary: 'arbitrary',
+        dependencies: ['foo', 'bar'],
+        dependencyOffsets: [12, 764],
+        map: {version: 3},
+        subObject: {foo: 'bar'},
+      };
+      transformCode.mockReturnValue(Promise.resolve(mockedResult));
+      const module = createModule({transformCode, options: {
+        cacheTransformResults: false,
+      }});
+
+      return module.read().then((result) => {
+        expect(result).toEqual({
+          dependencies: ['foo', 'bar'],
+        });
+      });
+    });
+
+    pit('stores all things if options is undefined', () => {
+      const mockedResult = {
+        code: exampleCode,
+        arbitrary: 'arbitrary',
+        dependencies: ['foo', 'bar'],
+        dependencyOffsets: [12, 764],
+        map: {version: 3},
+        subObject: {foo: 'bar'},
+      };
+      transformCode.mockReturnValue(Promise.resolve(mockedResult));
+      const module = createModule({transformCode, options: undefined});
+
+      return module.read().then((result) => {
+        expect(result).toEqual({ ...mockedResult, source: 'arbitrary(code);'});
+      });
+    });
+
+    pit('exposes the transformed code rather than the raw file contents', () => {
+      transformCode.mockReturnValue(Promise.resolve({code: exampleCode}));
+      const module = createModule({transformCode});
+      return Promise.all([module.read(), module.getCode()])
+        .then(([data, code]) => {
+          expect(data.code).toBe(exampleCode);
+          expect(code).toBe(exampleCode);
+        });
+    });
+
+    pit('exposes the raw file contents as `source` property', () => {
+      const module = createModule({transformCode});
+      return module.read()
+        .then(data => expect(data.source).toBe(fileContents));
+    });
+
+    pit('exposes a source map returned by the transform', () => {
+      const map = {version: 3};
+      transformCode.mockReturnValue(Promise.resolve({map, code: exampleCode}));
+      const module = createModule({transformCode});
+      return Promise.all([module.read(), module.getMap()])
+        .then(([data, sourceMap]) => {
+          expect(data.map).toBe(map);
+          expect(sourceMap).toBe(map);
+        });
+    });
+
+    describe('Caching based on options', () => {
+      let module;
+      beforeEach(function() {
+        module = createModule({transformCode});
+      });
+
+      const callsEqual = ([path1, key1], [path2, key2]) => {
+        expect(path1).toEqual(path2);
+        expect(key1).toEqual(key2);
+      };
+
+      it('gets dependencies from the cache with the same cache key for the same transform options', () => {
+        const options = {some: 'options'};
+        module.getDependencies(options); // first call
+        module.getDependencies(options); // second call
+
+        const {calls} = cache.get.mock;
+        callsEqual(calls[0], calls[1]);
+      });
+
+      it('gets dependencies from the cache with the same cache key for the equivalent transform options', () => {
+        module.getDependencies({a: 'b', c: 'd'}); // first call
+        module.getDependencies({c: 'd', a: 'b'}); // second call
+
+        const {calls} = cache.get.mock;
+        callsEqual(calls[0], calls[1]);
+      });
+
+      it('gets dependencies from the cache with different cache keys for different transform options', () => {
+        module.getDependencies({some: 'options'});
+        module.getDependencies({other: 'arbitrary options'});
+        const {calls} = cache.get.mock;
+        expect(calls[0][1]).not.toEqual(calls[1][1]);
+      });
+
+      it('gets code from the cache with the same cache key for the same transform options', () => {
+        const options = {some: 'options'};
+        module.getCode(options); // first call
+        module.getCode(options); // second call
+
+        const {calls} = cache.get.mock;
+        callsEqual(calls[0], calls[1]);
+      });
+
+      it('gets code from the cache with the same cache key for the equivalent transform options', () => {
+        module.getCode({a: 'b', c: 'd'}); // first call
+        module.getCode({c: 'd', a: 'b'}); // second call
+
+        const {calls} = cache.get.mock;
+        callsEqual(calls[0], calls[1]);
+      });
+
+      it('gets code from the cache with different cache keys for different transform options', () => {
+        module.getCode({some: 'options'});
+        module.getCode({other: 'arbitrary options'});
+        const {calls} = cache.get.mock;
+        expect(calls[0][1]).not.toEqual(calls[1][1]);
+      });
+    });
+  });
+});

react-packager/src/node-haste/__tests__/fastfs-data

@@ -0,0 +1,39 @@
+/**
+ * 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.
+ * An arbitrary module header
+ * @providesModule
+ */
+
+ const some: string = 'arbitrary code';
+ const containing: string = 'ūñïčødę';
+
+/**
+ * An arbitrary class that extends some thing
+ * It exposes a random number, which may be reset at the callers discretion
+ */
+class Arbitrary extends Something {
+  constructor() {
+    this.reset();
+  }
+
+  /**
+   * Returns the random number
+   * @returns number
+   */
+  get random(): number {
+    return this._random;
+  }
+
+  /**
+   * Re-creates the internal random number
+   * @returns void
+   */
+  reset(): void {
+    this._random = Math.random();
+  }
+}

react-packager/src/node-haste/__tests__/fastfs-integrated-test.js

@@ -0,0 +1,87 @@
+/**
+ * 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.
+ */
+'use strict';
+
+jest.autoMockOff()
+  .dontMock('graceful-fs');
+
+const Fastfs = require('../fastfs');
+
+const {EventEmitter} = require('events');
+const fs = require('fs');
+const path = require('path');
+
+const fileName = path.resolve(__dirname, 'fastfs-data');
+const contents = fs.readFileSync(fileName, 'utf-8');
+
+describe('fastfs:', function() {
+  let fastfs;
+  const crawling = Promise.resolve([fileName]);
+  const roots = [__dirname];
+  const watcher = new EventEmitter();
+
+  beforeEach(function(done) {
+    fastfs = new Fastfs('arbitrary', roots, watcher, {crawling});
+    fastfs.build().then(done);
+  });
+
+  describe('partial reading', () => {
+    // these are integrated tests that read real files from disk
+
+    pit('reads a file while a predicate returns true', function() {
+      return fastfs.readWhile(fileName, () => true).then(readContent =>
+        expect(readContent).toEqual(contents)
+      );
+    });
+
+    pit('invokes the predicate with the new chunk, the invocation index, and the result collected so far', () => {
+      const predicate = jest.genMockFn().mockReturnValue(true);
+      return fastfs.readWhile(fileName, predicate).then(() => {
+        let aggregated = '';
+        const {calls} = predicate.mock;
+        expect(calls).not.toEqual([]);
+
+        calls.forEach((call, i) => {
+          const [chunk] = call;
+          aggregated += chunk;
+          expect(chunk).not.toBe('');
+          expect(call).toEqual([chunk, i, aggregated]);
+        });
+
+        expect(aggregated).toEqual(contents);
+      });
+    });
+
+    pit('stops reading when the predicate returns false', () => {
+      const predicate = jest.genMockFn().mockImpl((_, i) => i !== 0);
+      return fastfs.readWhile(fileName, predicate).then((readContent) => {
+        const {calls} = predicate.mock;
+        expect(calls.length).toBe(1);
+        expect(readContent).toBe(calls[0][2]);
+      });
+    });
+
+    pit('after reading the whole file with `readWhile`, `read()` still works', () => {
+      // this test allows to reuse the results of `readWhile` for `readFile`
+      return fastfs.readWhile(fileName, () => true).then(() => {
+        fastfs.readFile(fileName).then(readContent =>
+          expect(readContent).toEqual(contents)
+        );
+      });
+    });
+
+    pit('after reading parts of the file with `readWhile`, `read()` still works', () => {
+      return fastfs.readWhile(fileName, () => false).then(() => {
+        fastfs.readFile(fileName).then(readContent =>
+          expect(readContent).toEqual(contents)
+        );
+      });
+    });
+  });
+});

react-packager/src/node-haste/__tests__/fastpath-test.js

@@ -0,0 +1,525 @@
+// 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.
+
+/*
+ * original author: dead_horse <dead_horse@qq.com>
+ * ported by: yaycmyk <evan@yaycmyk.com>
+ */
+
+jest.dontMock('../fastpath');
+const fp = () => require('../fastpath');
+
+describe('fast-path', () => {
+  const actual_platform = process.platform;
+  const invalidInputTests = [
+    true,
+    false,
+    7,
+    null,
+    {},
+    undefined,
+    [],
+    NaN,
+    () => {},
+  ];
+
+  const getErrorMessage = (fnName, test, expected, actual) => {
+    return [
+      `fastpath.${fnName}('${test}')`,
+      `expect=${JSON.stringify(expected)}`,
+      `actual=${JSON.stringify(actual)}`,
+    ].join('\n');
+  };
+
+  beforeEach(function() {
+    process.platform = 'linux';
+  });
+
+  afterEach(function() {
+    process.platform = actual_platform;
+  });
+
+  describe('basename', () => {
+    it('should resolve given paths', () => {
+      process.platform = actual_platform;
+
+      expect(fp().basename(__filename)).toEqual('fastpath-test.js');
+      expect(fp().basename(__filename, '.js')).toEqual('fastpath-test');
+      expect(fp().basename('')).toEqual('');
+      expect(fp().basename('/dir/basename.ext')).toEqual('basename.ext');
+      expect(fp().basename('/basename.ext')).toEqual('basename.ext');
+      expect(fp().basename('basename.ext')).toEqual('basename.ext');
+      expect(fp().basename('basename.ext/')).toEqual('basename.ext');
+      expect(fp().basename('basename.ext//')).toEqual('basename.ext');
+    });
+
+    it('should handle backslashes properly (win32)', () => {
+      process.platform = 'win32';
+
+      expect(fp().basename('\\dir\\basename.ext')).toEqual('basename.ext');
+      expect(fp().basename('\\basename.ext')).toEqual('basename.ext');
+      expect(fp().basename('basename.ext')).toEqual('basename.ext');
+      expect(fp().basename('basename.ext\\')).toEqual('basename.ext');
+      expect(fp().basename('basename.ext\\\\')).toEqual('basename.ext');
+    });
+
+    it('should handle backslashes properly (posix)', () => {
+      expect(fp().basename('\\dir\\basename.ext')).toEqual('\\dir\\basename.ext');
+      expect(fp().basename('\\basename.ext')).toEqual('\\basename.ext');
+      expect(fp().basename('basename.ext')).toEqual('basename.ext');
+      expect(fp().basename('basename.ext\\')).toEqual('basename.ext\\');
+      expect(fp().basename('basename.ext\\\\')).toEqual('basename.ext\\\\');
+    });
+
+    it('should handle control characters (posix)', () => {
+      // POSIX filenames may include control characters
+      // c.f. http://www.dwheeler.com/essays/fixing-unix-linux-filenames.html
+      const name = 'Icon' + String.fromCharCode(13);
+      expect(fp().basename('/a/b/' + name)).toEqual(name);
+    });
+  });
+
+  describe('extname', () => {
+    it('should extract the extension from a path', () => {
+      process.platform = actual_platform;
+
+      expect(fp().extname(__filename)).toEqual('.js');
+      expect(fp().extname('')).toEqual('');
+      expect(fp().extname('/path/to/file')).toEqual('');
+      expect(fp().extname('/path/to/file.ext')).toEqual('.ext');
+      expect(fp().extname('/path.to/file.ext')).toEqual('.ext');
+      expect(fp().extname('/path.to/file')).toEqual('');
+      expect(fp().extname('/path.to/.file')).toEqual('');
+      expect(fp().extname('/path.to/.file.ext')).toEqual('.ext');
+      expect(fp().extname('/path/to/f.ext')).toEqual('.ext');
+      expect(fp().extname('/path/to/..ext')).toEqual('.ext');
+      expect(fp().extname('file')).toEqual('');
+      expect(fp().extname('file.ext')).toEqual('.ext');
+      expect(fp().extname('.file')).toEqual('');
+      expect(fp().extname('.file.ext')).toEqual('.ext');
+      expect(fp().extname('/file')).toEqual('');
+      expect(fp().extname('/file.ext')).toEqual('.ext');
+      expect(fp().extname('/.file')).toEqual('');
+      expect(fp().extname('/.file.ext')).toEqual('.ext');
+      expect(fp().extname('.path/file.ext')).toEqual('.ext');
+      expect(fp().extname('file.ext.ext')).toEqual('.ext');
+      expect(fp().extname('file.')).toEqual('.');
+      expect(fp().extname('.')).toEqual('');
+      expect(fp().extname('./')).toEqual('');
+      expect(fp().extname('.file.ext')).toEqual('.ext');
+      expect(fp().extname('.file')).toEqual('');
+      expect(fp().extname('.file.')).toEqual('.');
+      expect(fp().extname('.file..')).toEqual('.');
+      expect(fp().extname('..')).toEqual('');
+      expect(fp().extname('../')).toEqual('');
+      expect(fp().extname('..file.ext')).toEqual('.ext');
+      expect(fp().extname('..file')).toEqual('.file');
+      expect(fp().extname('..file.')).toEqual('.');
+      expect(fp().extname('..file..')).toEqual('.');
+      expect(fp().extname('...')).toEqual('.');
+      expect(fp().extname('...ext')).toEqual('.ext');
+      expect(fp().extname('....')).toEqual('.');
+      expect(fp().extname('file.ext/')).toEqual('.ext');
+      expect(fp().extname('file.ext//')).toEqual('.ext');
+      expect(fp().extname('file/')).toEqual('');
+      expect(fp().extname('file//')).toEqual('');
+      expect(fp().extname('file./')).toEqual('.');
+      expect(fp().extname('file.//')).toEqual('.');
+    });
+
+    it('should handle path backslashes (win32)', () => {
+      process.platform = 'win32';
+
+      // On windows, backspace is a path separator.
+      expect(fp().extname('.\\')).toEqual('');
+      expect(fp().extname('..\\')).toEqual('');
+      expect(fp().extname('file.ext\\')).toEqual('.ext');
+      expect(fp().extname('file.ext\\\\')).toEqual('.ext');
+      expect(fp().extname('file\\')).toEqual('');
+      expect(fp().extname('file\\\\')).toEqual('');
+      expect(fp().extname('file.\\')).toEqual('.');
+      expect(fp().extname('file.\\\\')).toEqual('.');
+    });
+
+    it('should handle path backslashes (posix)', () => {
+      // On unix, backspace is a valid name component like any other character.
+      expect(fp().extname('.\\')).toEqual('');
+      expect(fp().extname('..\\')).toEqual('.\\');
+      expect(fp().extname('file.ext\\')).toEqual('.ext\\');
+      expect(fp().extname('file.ext\\\\')).toEqual('.ext\\\\');
+      expect(fp().extname('file\\')).toEqual('');
+      expect(fp().extname('file\\\\')).toEqual('');
+      expect(fp().extname('file.\\')).toEqual('.\\');
+      expect(fp().extname('file.\\\\')).toEqual('.\\\\');
+    });
+  });
+
+  describe('dirname', () => {
+    it('should isolate the directory name from a path (posix)', () => {
+      expect(fp().dirname('/a/b/')).toEqual('/a');
+      expect(fp().dirname('/a/b')).toEqual('/a');
+      expect(fp().dirname('/a')).toEqual('/');
+      expect(fp().dirname('')).toEqual('.');
+      expect(fp().dirname('/')).toEqual('/');
+      expect(fp().dirname('////')).toEqual('/');
+    });
+
+    it('should isolate the directory name from a path (win32)', () => {
+      process.platform = 'win32';
+
+      expect(fp().dirname('C:\\')).toEqual('C:\\');
+      expect(fp().dirname('c:\\')).toEqual('c:\\');
+      expect(fp().dirname('c:\\foo')).toEqual('c:\\');
+      expect(fp().dirname('c:\\foo\\')).toEqual('c:\\');
+      expect(fp().dirname('c:\\foo\\bar')).toEqual('c:\\foo');
+      expect(fp().dirname('c:\\foo\\bar\\')).toEqual('c:\\foo');
+      expect(fp().dirname('c:\\foo\\bar\\baz')).toEqual('c:\\foo\\bar');
+      expect(fp().dirname('\\')).toEqual('\\');
+      expect(fp().dirname('\\foo')).toEqual('\\');
+      expect(fp().dirname('\\foo\\')).toEqual('\\');
+      expect(fp().dirname('\\foo\\bar')).toEqual('\\foo');
+      expect(fp().dirname('\\foo\\bar\\')).toEqual('\\foo');
+      expect(fp().dirname('\\foo\\bar\\baz')).toEqual('\\foo\\bar');
+      expect(fp().dirname('c:')).toEqual('c:');
+      expect(fp().dirname('c:foo')).toEqual('c:');
+      expect(fp().dirname('c:foo\\')).toEqual('c:');
+      expect(fp().dirname('c:foo\\bar')).toEqual('c:foo');
+      expect(fp().dirname('c:foo\\bar\\')).toEqual('c:foo');
+      expect(fp().dirname('c:foo\\bar\\baz')).toEqual('c:foo\\bar');
+      expect(fp().dirname('\\\\unc\\share')).toEqual('\\\\unc\\share');
+      expect(fp().dirname('\\\\unc\\share\\foo')).toEqual('\\\\unc\\share\\');
+      expect(fp().dirname('\\\\unc\\share\\foo\\')).toEqual('\\\\unc\\share\\');
+      expect(fp().dirname('\\\\unc\\share\\foo\\bar')).toEqual('\\\\unc\\share\\foo');
+      expect(fp().dirname('\\\\unc\\share\\foo\\bar\\')).toEqual('\\\\unc\\share\\foo');
+      expect(fp().dirname('\\\\unc\\share\\foo\\bar\\baz')).toEqual('\\\\unc\\share\\foo\\bar');
+    });
+  });
+
+  describe('join', () => {
+    const posixJoinTests = [
+      // arguments                      result
+      [['.', 'x/b', '..', '/b/c.js'],   'x/b/c.js'],
+      [['/.', 'x/b', '..', '/b/c.js'],  '/x/b/c.js'],
+      [['/foo', '../../../bar'],        '/bar'],
+      [['foo', '../../../bar'],         '../../bar'],
+      [['foo/', '../../../bar'],        '../../bar'],
+      [['foo/x', '../../../bar'],       '../bar'],
+      [['foo/x', './bar'],              'foo/x/bar'],
+      [['foo/x/', './bar'],             'foo/x/bar'],
+      [['foo/x/', '.', 'bar'],          'foo/x/bar'],
+      [['./'],                          './'],
+      [['.', './'],                     './'],
+      [['.', '.', '.'],                 '.'],
+      [['.', './', '.'],                '.'],
+      [['.', '/./', '.'],               '.'],
+      [['.', '/////./', '.'],           '.'],
+      [['.'],                           '.'],
+      [['', '.'],                       '.'],
+      [['', 'foo'],                     'foo'],
+      [['foo', '/bar'],                 'foo/bar'],
+      [['', '/foo'],                    '/foo'],
+      [['', '', '/foo'],                '/foo'],
+      [['', '', 'foo'],                 'foo'],
+      [['foo', ''],                     'foo'],
+      [['foo/', ''],                    'foo/'],
+      [['foo', '', '/bar'],             'foo/bar'],
+      [['./', '..', '/foo'],            '../foo'],
+      [['./', '..', '..', '/foo'],      '../../foo'],
+      [['.', '..', '..', '/foo'],       '../../foo'],
+      [['', '..', '..', '/foo'],        '../../foo'],
+      [['/'],                           '/'],
+      [['/', '.'],                      '/'],
+      [['/', '..'],                     '/'],
+      [['/', '..', '..'],               '/'],
+      [[''],                            '.'],
+      [['', ''],                        '.'],
+      [[' /foo'],                       ' /foo'],
+      [[' ', 'foo'],                    ' /foo'],
+      [[' ', '.'],                      ' '],
+      [[' ', '/'],                      ' /'],
+      [[' ', ''],                       ' '],
+      [['/', 'foo'],                    '/foo'],
+      [['/', '/foo'],                   '/foo'],
+      [['/', '//foo'],                  '/foo'],
+      [['/', '', '/foo'],               '/foo'],
+      [['', '/', 'foo'],                '/foo'],
+      [['', '/', '/foo'],               '/foo'],
+    ];
+
+    const win32JoinTests = posixJoinTests.concat([
+      // UNC path expected
+      [['//foo/bar'], '//foo/bar/'],
+      [['\\/foo/bar'], '//foo/bar/'],
+      [['\\\\foo/bar'], '//foo/bar/'],
+      // UNC path expected - server and share separate
+      [['//foo', 'bar'], '//foo/bar/'],
+      [['//foo/', 'bar'], '//foo/bar/'],
+      [['//foo', '/bar'], '//foo/bar/'],
+      // UNC path expected - questionable
+      [['//foo', '', 'bar'], '//foo/bar/'],
+      [['//foo/', '', 'bar'], '//foo/bar/'],
+      [['//foo/', '', '/bar'], '//foo/bar/'],
+      // UNC path expected - even more questionable
+      [['', '//foo', 'bar'], '//foo/bar/'],
+      [['', '//foo/', 'bar'], '//foo/bar/'],
+      [['', '//foo/', '/bar'], '//foo/bar/'],
+      // No UNC path expected (no double slash in first component)
+      [['\\', 'foo/bar'], '/foo/bar'],
+      [['\\', '/foo/bar'], '/foo/bar'],
+      [['', '/', '/foo/bar'], '/foo/bar'],
+      // No UNC path expected (no non-slashes in first component - questionable)
+      [['//', 'foo/bar'], '/foo/bar'],
+      [['//', '/foo/bar'], '/foo/bar'],
+      [['\\\\', '/', '/foo/bar'], '/foo/bar'],
+      [['//'], '/'],
+      // No UNC path expected (share name missing - questionable).
+      [['//foo'], '/foo'],
+      [['//foo/'], '/foo/'],
+      [['//foo', '/'], '/foo/'],
+      [['//foo', '', '/'], '/foo/'],
+      // No UNC path expected (too many leading slashes - questionable)
+      [['///foo/bar'], '/foo/bar'],
+      [['////foo', 'bar'], '/foo/bar'],
+      [['\\\\\\/foo/bar'], '/foo/bar'],
+      // Drive-relative vs drive-absolute paths. This merely describes the
+      // status quo, rather than being obviously right
+      [['C:'], 'C:.'],
+      [['c:'], 'c:.'],
+      [['c:.'], 'c:.'],
+      [['c:', ''], 'c:.'],
+      [['', 'c:'], 'c:.'],
+      [['c:.', '/'], 'c:./'],
+      [['c:.', 'file'], 'c:file'],
+      [['c:', '/'], 'c:/'],
+      [['c:', 'file'], 'c:/file'],
+    ]);
+
+    it('should join the paths correctly (posix)', () => {
+      posixJoinTests.forEach((test) => {
+        const actual = fp().join(...test[0]);
+        const expected = test[1];
+
+        expect(actual).toEqual(expected, getErrorMessage('join',
+          test[0].map(JSON.stringify).join(','),
+          expected,
+          actual,
+        ));
+      });
+    });
+
+    it('should join the paths correctly (win32)', () => {
+      process.platform = 'win32';
+
+      win32JoinTests.forEach((test) => {
+        const actual = fp().join(...test[0]);
+        const expected = test[1].replace(/\//g, '\\');
+
+        expect(actual).toEqual(expected, getErrorMessage('join',
+          test[0].map(JSON.stringify).join(','),
+          expected,
+          actual,
+        ));
+      });
+    });
+
+    it('should throw for invalid input', () => {
+      invalidInputTests.forEach((test) => {
+        expect(() => fp().join(test)).toThrow();
+      });
+    });
+  });
+
+  describe('normalize', () => {
+    it('should return a valid path (posix)', () => {
+      expect(fp().normalize('./fixtures///b/../b/c.js')).toEqual('fixtures/b/c.js');
+      expect(fp().normalize('/foo/../../../bar')).toEqual('/bar');
+      expect(fp().normalize('a//b//../b')).toEqual('a/b');
+      expect(fp().normalize('a//b//./c')).toEqual('a/b/c');
+      expect(fp().normalize('a//b//.')).toEqual('a/b');
+    });
+
+    it('should return a valid path (win32)', () => {
+      process.platform = 'win32';
+      expect(fp().normalize('./fixtures///b/../b/c.js')).toEqual('fixtures\\b\\c.js');
+      expect(fp().normalize('/foo/../../../bar')).toEqual('\\bar');
+      expect(fp().normalize('a//b//../b')).toEqual('a\\b');
+      expect(fp().normalize('a//b//./c')).toEqual('a\\b\\c');
+      expect(fp().normalize('a//b//.')).toEqual('a\\b');
+      expect(fp().normalize('//server/share/dir/file.ext')).toEqual('\\\\server\\share\\dir\\file.ext');
+    });
+  });
+
+  describe('resolve', () => {
+    const win32ResolveTests = [
+      // arguments                                    result
+      [['C:/blah\\blah', 'D:/games', 'C:../a'], 'C:\\blah\\a'],
+      [['c:/blah\\blah', 'd:/games', 'c:../a'], 'c:\\blah\\a'],
+      [['c:/ignore', 'd:\\a/b\\c/d', '\\e.exe'], 'd:\\e.exe'],
+      [['c:/ignore', 'c:/some/file'], 'c:\\some\\file'],
+      [['d:/ignore', 'd:some/dir//'], 'd:\\ignore\\some\\dir'],
+      [['//server/share', '..', 'relative\\'], '\\\\server\\share\\relative'],
+      [['c:/', '//'], 'c:\\'],
+      [['c:/', '//dir'], 'c:\\dir'],
+      [['c:/', '//server/share'], '\\\\server\\share\\'],
+      [['c:/', '//server//share'], '\\\\server\\share\\'],
+      [['c:/', '///some//dir'], 'c:\\some\\dir'],
+    ];
+
+    const posixResolveTests = [
+      // arguments                   result
+      [['/var/lib', '../', 'file/'], '/var/file'],
+      [['/var/lib', '/../', 'file/'], '/file'],
+      [['/some/dir', '.', '/absolute/'], '/absolute'],
+    ];
+
+    it('should resolve the current working directory', () => {
+      process.platform = actual_platform;
+
+      const actual = fp().resolve('.');
+      const expected = process.cwd();
+
+      expect(actual).toEqual(expected, getErrorMessage('resolve', '.', expected, actual));
+    });
+
+    it('should resolve paths (posix)', () => {
+      posixResolveTests.forEach((test) => {
+        const actual = fp().resolve(...test[0]);
+        const expected = test[1];
+
+        expect(actual).toEqual(expected, getErrorMessage('resolve', test, expected, actual));
+      });
+    });
+
+    it('should resolve paths (win32)', () => {
+      process.platform = 'win32';
+
+      win32ResolveTests.forEach((test) => {
+        const actual = fp().resolve(...test[0]);
+        const expected = test[1];
+
+        expect(actual).toEqual(expected, getErrorMessage('resolve', test, expected, actual));
+      });
+    });
+
+    it('should throw for invalid input', () => {
+      invalidInputTests.forEach((test) => {
+        expect(() => fp().resolve(test)).toThrow();
+      });
+    });
+  });
+
+  describe('isAbsolute', () => {
+    it('should work (posix)', () => {
+      expect(fp().isAbsolute('/home/foo')).toEqual(true);
+      expect(fp().isAbsolute('/home/foo/..')).toEqual(true);
+      expect(fp().isAbsolute('bar/')).toEqual(false);
+      expect(fp().isAbsolute('./baz')).toEqual(false);
+    });
+
+    it('should work (win32)', () => {
+      process.platform = 'win32';
+      expect(fp().isAbsolute('//server/file')).toEqual(true);
+      expect(fp().isAbsolute('\\\\server\\file')).toEqual(true);
+      expect(fp().isAbsolute('C:/Users/')).toEqual(true);
+      expect(fp().isAbsolute('C:\\Users\\')).toEqual(true);
+      expect(fp().isAbsolute('C:cwd/another')).toEqual(false);
+      expect(fp().isAbsolute('C:cwd\\another')).toEqual(false);
+      expect(fp().isAbsolute('directory/directory')).toEqual(false);
+      expect(fp().isAbsolute('directory\\directory')).toEqual(false);
+    });
+  });
+
+  describe('relative', () => {
+    const win32RelativeTests = [
+      // arguments                     result
+      ['C:/blah\\blah', 'D:/games', 'D:\\games'],
+      ['c:/blah\\blah', 'd:/games', 'd:\\games'],
+      ['c:/aaaa/bbbb', 'c:/aaaa', '..'],
+      ['c:/aaaa/bbbb', 'c:/cccc', '..\\..\\cccc'],
+      ['c:/aaaa/bbbb', 'c:/aaaa/bbbb', ''],
+      ['c:/aaaa/bbbb', 'c:/aaaa/cccc', '..\\cccc'],
+      ['c:/aaaa/', 'c:/aaaa/cccc', 'cccc'],
+      ['c:/', 'c:\\aaaa\\bbbb', 'aaaa\\bbbb'],
+      ['c:/aaaa/bbbb', 'd:\\', 'd:\\'],
+    ];
+
+    const posixRelativeTests = [
+      // arguments                    result
+      ['/var/lib', '/var', '..'],
+      ['/var/lib', '/bin', '../../bin'],
+      ['/var/lib', '/var/lib', ''],
+      ['/var/lib', '/var/apache', '../apache'],
+      ['/var/', '/var/lib', 'lib'],
+      ['/', '/var/lib', 'var/lib'],
+    ];
+
+    it('should work (posix)', () => {
+      posixRelativeTests.forEach((test) => {
+        const actual = fp().relative(test[0], test[1]);
+        const expected = test[2];
+
+        expect(actual).toEqual(expected, getErrorMessage('relative',
+          test.slice(0, 2).map(JSON.stringify).join(','),
+          expected,
+          actual,
+        ));
+      });
+    });
+
+    it('should work (win32)', () => {
+      process.platform = 'win32';
+
+      win32RelativeTests.forEach((test) => {
+        const actual = fp().relative(test[0], test[1]);
+        const expected = test[2];
+
+        expect(actual).toEqual(expected, getErrorMessage('relative',
+          test.slice(0, 2).map(JSON.stringify).join(','),
+          expected,
+          actual,
+        ));
+      });
+    });
+  });
+
+  describe('(static export) sep', () => {
+    it('should be a backslash (win32)', () => {
+      process.platform = 'win32';
+
+      expect(fp().sep).toEqual('\\');
+    });
+
+    it('should be a forward slash (posix)', () => {
+      expect(fp().sep).toEqual('/');
+    });
+  });
+
+  describe('(static export) delimiter', () => {
+    it('should be a semicolon (win32)', () => {
+      process.platform = 'win32';
+      expect(fp().delimiter).toEqual(';');
+    });
+
+    it('should be a colon (posix)', () => {
+      expect(fp().delimiter).toEqual(':');
+    });
+  });
+});

react-packager/src/node-haste/crawlers/index.js

@@ -0,0 +1,13 @@
+'use strict';
+
+const nodeCrawl = require('./node');
+const watchmanCrawl = require('./watchman');
+
+function crawl(roots, options) {
+  const {fileWatcher} = options;
+  return (fileWatcher ? fileWatcher.isWatchman() : Promise.resolve(false)).then(
+    isWatchman => isWatchman ? watchmanCrawl(roots, options) : nodeCrawl(roots, options)
+  );
+}
+
+module.exports = crawl;

react-packager/src/node-haste/crawlers/node.js

@@ -0,0 +1,61 @@
+'use strict';
+
+const denodeify = require('denodeify');
+const debug = require('debug')('ReactNativePackager:DependencyGraph');
+const fs = require('graceful-fs');
+const path = require('../fastpath');
+
+const readDir = denodeify(fs.readdir);
+const stat = denodeify(fs.stat);
+
+function nodeRecReadDir(roots, {ignore, exts}) {
+  const queue = roots.slice();
+  const retFiles = [];
+  const extPattern = new RegExp(
+    '\.(' + exts.join('|') + ')$'
+  );
+
+  function search() {
+    const currDir = queue.shift();
+    if (!currDir) {
+      return Promise.resolve();
+    }
+
+    return readDir(currDir)
+      .then(files => files.map(f => path.join(currDir, f)))
+      .then(files => Promise.all(
+        files.map(f => stat(f).catch(handleBrokenLink))
+      ).then(stats => [
+        // Remove broken links.
+        files.filter((file, i) => !!stats[i]),
+        stats.filter(Boolean),
+      ]))
+      .then(([files, stats]) => {
+        files.forEach((filePath, i) => {
+          if (ignore(filePath)) {
+            return;
+          }
+
+          if (stats[i].isDirectory()) {
+            queue.push(filePath);
+            return;
+          }
+
+          if (filePath.match(extPattern)) {
+            retFiles.push(path.resolve(filePath));
+          }
+        });
+
+        return search();
+      });
+  }
+
+  return search().then(() => retFiles);
+}
+
+function handleBrokenLink(e) {
+  debug('WARNING: error stating, possibly broken symlink', e.message);
+  return Promise.resolve();
+}
+
+module.exports = nodeRecReadDir;

react-packager/src/node-haste/crawlers/watchman.js

@@ -0,0 +1,76 @@
+'use strict';
+
+const denodeify = require('denodeify');
+const path = require('../fastpath');
+
+const watchmanURL = 'https://facebook.github.io/watchman/docs/troubleshooting.html';
+
+function watchmanRecReadDir(roots, {ignore, fileWatcher, exts}) {
+  const files = [];
+  return Promise.all(
+    roots.map(
+      root => fileWatcher.getWatcherForRoot(root)
+    )
+  ).then(
+    watchers => {
+      // All watchman roots for all watches we have.
+      const watchmanRoots = watchers.map(
+        watcher => watcher.watchProjectInfo.root
+      );
+
+      // Actual unique watchers (because we use watch-project we may end up with
+      // duplicate "real" watches, and that's by design).
+      // TODO(amasad): push this functionality into the `FileWatcher`.
+      const uniqueWatchers = watchers.filter(
+        (watcher, i) => watchmanRoots.indexOf(watcher.watchProjectInfo.root) === i
+      );
+
+      return Promise.all(
+        uniqueWatchers.map(watcher => {
+          const watchedRoot = watcher.watchProjectInfo.root;
+
+          // Build up an expression to filter the output by the relevant roots.
+          const dirExpr = ['anyof'];
+          for (let i = 0; i < roots.length; i++) {
+            const root = roots[i];
+            if (isDescendant(watchedRoot, root)) {
+              dirExpr.push(['dirname', path.relative(watchedRoot, root)]);
+            }
+          }
+
+          const cmd = denodeify(watcher.client.command.bind(watcher.client));
+          return cmd(['query', watchedRoot, {
+            suffix: exts,
+            expression: ['allof', ['type', 'f'], 'exists', dirExpr],
+            fields: ['name'],
+          }]).then(resp => {
+            if ('warning' in resp) {
+              console.warn('watchman warning: ', resp.warning);
+            }
+
+            resp.files.forEach(filePath => {
+              filePath = watchedRoot + path.sep + filePath;
+              if (!ignore(filePath)) {
+                files.push(filePath);
+              }
+              return false;
+            });
+          });
+        })
+      );
+    }).then(
+      () => files,
+      error => {
+        throw new Error(
+          `Watchman error: ${error.message.trim()}. Make sure watchman ` +
+          `is running for this project. See ${watchmanURL}.`
+        );
+      }
+    );
+}
+
+function isDescendant(root, child) {
+  return child.startsWith(root);
+}
+
+module.exports = watchmanRecReadDir;

react-packager/src/node-haste/fastfs.js

@@ -0,0 +1,362 @@
+/**
+ * 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.
+ */
+'use strict';
+
+const denodeify = require('denodeify');
+const {EventEmitter} = require('events');
+
+const fs = require('graceful-fs');
+const path = require('./fastpath');
+
+const readFile = denodeify(fs.readFile);
+const stat = denodeify(fs.stat);
+
+const NOT_FOUND_IN_ROOTS = 'NotFoundInRootsError';
+
+class Fastfs extends EventEmitter {
+  constructor(name, roots, fileWatcher, {ignore, crawling, activity}) {
+    super();
+    this._name = name;
+    this._fileWatcher = fileWatcher;
+    this._ignore = ignore;
+    this._roots = roots.map(root => {
+      // If the path ends in a separator ("/"), remove it to make string
+      // operations on paths safer.
+      if (root.endsWith(path.sep)) {
+        root = root.substr(0, root.length - 1);
+      }
+
+      root = path.resolve(root);
+
+      return new File(root, true);
+    });
+    this._fastPaths = Object.create(null);
+    this._crawling = crawling;
+    this._activity = activity;
+  }
+
+  build() {
+    return this._crawling.then(files => {
+      let fastfsActivity;
+      const activity = this._activity;
+      if (activity) {
+        fastfsActivity = activity.startEvent('Building in-memory fs for ' + this._name);
+      }
+      files.forEach(filePath => {
+        const root = this._getRoot(filePath);
+        if (root) {
+          const newFile = new File(filePath, false);
+          const dirname = filePath.substr(0, filePath.lastIndexOf(path.sep));
+          const parent = this._fastPaths[dirname];
+          this._fastPaths[filePath] = newFile;
+          if (parent) {
+            parent.addChild(newFile, this._fastPaths);
+          } else {
+            root.addChild(newFile, this._fastPaths);
+          }
+        }
+      });
+      if (activity) {
+        activity.endEvent(fastfsActivity);
+      }
+
+      if (this._fileWatcher) {
+        this._fileWatcher.on('all', this._processFileChange.bind(this));
+      }
+    });
+  }
+
+  stat(filePath) {
+    return Promise.resolve().then(() => this._getFile(filePath).stat());
+  }
+
+  getAllFiles() {
+    return Object.keys(this._fastPaths)
+      .filter(filePath => !this._fastPaths[filePath].isDir);
+  }
+
+  findFilesByExts(exts, { ignore } = {}) {
+    return this.getAllFiles()
+      .filter(filePath => (
+        exts.indexOf(path.extname(filePath).substr(1)) !== -1 &&
+        (!ignore || !ignore(filePath))
+      ));
+  }
+
+  matchFilesByPattern(pattern) {
+    return this.getAllFiles().filter(file => file.match(pattern));
+  }
+
+  readFile(filePath) {
+    const file = this._getFile(filePath);
+    if (!file) {
+      throw new Error(`Unable to find file with path: ${filePath}`);
+    }
+    return file.read();
+  }
+
+  readWhile(filePath, predicate) {
+    const file = this._getFile(filePath);
+    if (!file) {
+      throw new Error(`Unable to find file with path: ${filePath}`);
+    }
+    return file.readWhile(predicate);
+  }
+
+  closest(filePath, name) {
+    for (let file = this._getFile(filePath).parent;
+         file;
+         file = file.parent) {
+      if (file.children[name]) {
+        return file.children[name].path;
+      }
+    }
+    return null;
+  }
+
+  fileExists(filePath) {
+    let file;
+    try {
+      file = this._getFile(filePath);
+    } catch (e) {
+      if (e.type === NOT_FOUND_IN_ROOTS) {
+        return false;
+      }
+      throw e;
+    }
+
+    return file && !file.isDir;
+  }
+
+  dirExists(filePath) {
+    let file;
+    try {
+      file = this._getFile(filePath);
+    } catch (e) {
+      if (e.type === NOT_FOUND_IN_ROOTS) {
+        return false;
+      }
+      throw e;
+    }
+
+    return file && file.isDir;
+  }
+
+  matches(dir, pattern) {
+    const dirFile = this._getFile(dir);
+    if (!dirFile.isDir) {
+      throw new Error(`Expected file ${dirFile.path} to be a directory`);
+    }
+
+    return Object.keys(dirFile.children)
+      .filter(name => name.match(pattern))
+      .map(name => path.join(dirFile.path, name));
+  }
+
+  _getRoot(filePath) {
+    for (let i = 0; i < this._roots.length; i++) {
+      const possibleRoot = this._roots[i];
+      if (isDescendant(possibleRoot.path, filePath)) {
+        return possibleRoot;
+      }
+    }
+    return null;
+  }
+
+  _getAndAssertRoot(filePath) {
+    const root = this._getRoot(filePath);
+    if (!root) {
+      const error = new Error(`File ${filePath} not found in any of the roots`);
+      error.type = NOT_FOUND_IN_ROOTS;
+      throw error;
+    }
+    return root;
+  }
+
+  _getFile(filePath) {
+    filePath = path.resolve(filePath);
+    if (!this._fastPaths[filePath]) {
+      const file = this._getAndAssertRoot(filePath).getFileFromPath(filePath);
+      if (file) {
+        this._fastPaths[filePath] = file;
+      }
+    }
+
+    return this._fastPaths[filePath];
+  }
+
+  _processFileChange(type, filePath, rootPath, fstat) {
+    const absPath = path.join(rootPath, filePath);
+    if (this._ignore(absPath) || (fstat && fstat.isDirectory())) {
+      return;
+    }
+
+    // Make sure this event belongs to one of our roots.
+    const root = this._getRoot(absPath);
+    if (!root) {
+      return;
+    }
+
+    if (type === 'delete' || type === 'change') {
+      const file = this._getFile(absPath);
+      if (file) {
+        file.remove();
+      }
+    }
+
+    delete this._fastPaths[path.resolve(absPath)];
+
+    if (type !== 'delete') {
+      const file = new File(absPath, false);
+      root.addChild(file, this._fastPaths);
+    }
+
+    this.emit('change', type, filePath, rootPath, fstat);
+  }
+}
+
+class File {
+  constructor(filePath, isDir) {
+    this.path = filePath;
+    this.isDir = isDir;
+    this.children = this.isDir ? Object.create(null) : null;
+  }
+
+  read() {
+    if (!this._read) {
+      this._read = readFile(this.path, 'utf8');
+    }
+    return this._read;
+  }
+
+  readWhile(predicate) {
+    return readWhile(this.path, predicate).then(({result, completed}) => {
+      if (completed && !this._read) {
+        this._read = Promise.resolve(result);
+      }
+      return result;
+    });
+  }
+
+  stat() {
+    if (!this._stat) {
+      this._stat = stat(this.path);
+    }
+
+    return this._stat;
+  }
+
+  addChild(file, fileMap) {
+    const parts = file.path.substr(this.path.length + 1).split(path.sep);
+    if (parts.length === 1) {
+      this.children[parts[0]] = file;
+      file.parent = this;
+    } else if (this.children[parts[0]]) {
+      this.children[parts[0]].addChild(file, fileMap);
+    } else {
+      const dir = new File(this.path + path.sep + parts[0], true);
+      dir.parent = this;
+      this.children[parts[0]] = dir;
+      fileMap[dir.path] = dir;
+      dir.addChild(file, fileMap);
+    }
+  }
+
+  getFileFromPath(filePath) {
+    const parts = path.relative(this.path, filePath).split(path.sep);
+
+    /*eslint consistent-this:0*/
+    let file = this;
+    for (let i = 0; i < parts.length; i++) {
+      const fileName = parts[i];
+      if (!fileName) {
+        continue;
+      }
+
+      if (!file || !file.isDir) {
+        // File not found.
+        return null;
+      }
+
+      file = file.children[fileName];
+    }
+
+    return file;
+  }
+
+  ext() {
+    return path.extname(this.path).substr(1);
+  }
+
+  remove() {
+    if (!this.parent) {
+      throw new Error(`No parent to delete ${this.path} from`);
+    }
+
+    delete this.parent.children[path.basename(this.path)];
+  }
+}
+
+function readWhile(filePath, predicate) {
+  return new Promise((resolve, reject) => {
+    fs.open(filePath, 'r', (openError, fd) => {
+      if (openError) {
+        reject(openError);
+        return;
+      }
+
+      read(
+        fd,
+        /*global Buffer: true*/
+        new Buffer(512),
+        makeReadCallback(fd, predicate, (readError, result, completed) => {
+          if (readError) {
+            reject(readError);
+          } else {
+            resolve({result, completed});
+          }
+        })
+      );
+    });
+  });
+}
+
+function read(fd, buffer, callback) {
+  fs.read(fd, buffer, 0, buffer.length, -1, callback);
+}
+
+function close(fd, error, result, complete, callback) {
+  fs.close(fd, closeError => callback(error || closeError, result, complete));
+}
+
+function makeReadCallback(fd, predicate, callback) {
+  let result = '';
+  let index = 0;
+  return function readCallback(error, bytesRead, buffer) {
+    if (error) {
+      close(fd, error, undefined, false, callback);
+      return;
+    }
+
+    const completed = bytesRead === 0;
+    const chunk = completed ? '' : buffer.toString('utf8', 0, bytesRead);
+    result += chunk;
+    if (completed || !predicate(chunk, index++, result)) {
+      close(fd, null, result, completed, callback);
+    } else {
+      read(fd, buffer, readCallback);
+    }
+  };
+}
+
+function isDescendant(root, child) {
+  return child.startsWith(root);
+}
+
+module.exports = Fastfs;

react-packager/src/node-haste/fastpath.js

@@ -0,0 +1,619 @@
+/*!
+ * fast-path - index.js
+ * MIT License
+ *
+ * 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.
+ *
+ * original author: dead_horse <dead_horse@qq.com>
+ * ported by: yaycmyk <evan@yaycmyk.com>
+ *
+ * VERSION 1.2.0
+ */
+
+'use strict';
+
+const fs = require('fs');
+const path = require('path');
+const util = require('util');
+
+const all = Object.keys(exports).filter((name) => name !== 'replace');
+const IS_WINDOWS = process.platform === 'win32';
+
+function isString(arg) {
+  return typeof arg === 'string';
+}
+
+const splitDeviceRe =
+      /^([a-zA-Z]:|[\\\/]{2}[^\\\/]+[\\\/]+[^\\\/]+)?([\\\/])?([\s\S]*?)$/;
+
+function getDevice(filename) {
+  const result = splitDeviceRe.exec(filename);
+
+  return (result[1] || '') + (result[2] || '');
+}
+
+// resolves . and .. elements in a path array with directory names there
+// must be no slashes, or device names (c:\) in the array
+// (so also no leading and trailing slashes - it does not distinguish
+// relative and absolute paths)
+function normalizeArray(parts, allowAboveRoot) {
+  const nonEmptyParts = [];
+  let nonBack = true;
+
+  for (let i = 0; i < parts.length; i++) {
+    const p = parts[i];
+
+    if (p && p !== '.') {
+      nonEmptyParts.push(p);
+    }
+
+    if (p === '..') {
+      nonBack = false;
+    }
+  }
+
+  parts = nonEmptyParts;
+
+  // if the path does not contain ..
+  if (nonBack) {
+    return parts;
+  }
+
+  // if the path tries to go ab ove the root, `up` ends up > 0
+  let up = 0;
+  const res = [];
+
+  for (let i = parts.length - 1; i >= 0; i--) {
+    if (parts[i] === '..') {
+      up++;
+    } else if (up) {
+      up--;
+    } else {
+      res.push(parts[i]);
+    }
+  }
+
+  // if the path is allowed to go above the root, restore leading ..s
+  if (allowAboveRoot) {
+    for (; up--; up) {
+      res.push('..');
+    }
+  }
+
+  return res.reverse();
+}
+
+function trim(arr) {
+  let start = 0;
+
+  for (; start < arr.length; start++) {
+    if (arr[start] !== '') { break; }
+  }
+
+  let end = arr.length - 1;
+
+  for (; end >= 0; end--) {
+    if (arr[end] !== '') { break; }
+  }
+
+  return start <= end ? arr.slice(start, end + 1) : [];
+}
+
+function normalizeUNCRoot(device) {
+  return '\\\\' + device.replace(/^[\\\/]+/, '').replace(/[\\\/]+/g, '\\');
+}
+
+exports.sep = IS_WINDOWS ? '\\' : '/';
+exports.delimiter = IS_WINDOWS ? ';' : ':';
+
+if (IS_WINDOWS) {
+  // path.resolve([from ...], to)
+  // windows version
+  exports.resolve = function resolveWIN32() {
+    let resolvedDevice = '';
+    let resolvedTail = '';
+    let resolvedAbsolute = false;
+
+    for (let i = arguments.length - 1; i >= -1; i--) {
+      let path;
+
+      if (i >= 0) {
+        path = arguments[i];
+      } else if (!resolvedDevice) {
+        path = process.cwd();
+      } else {
+        // Windows has the concept of drive-specific current working
+        // directories. If we've resolved a drive letter but not yet an
+        // absolute path, get cwd for that drive. We're sure the device is not
+        // an unc path at this points, because unc paths are always absolute.
+        path = process.env['=' + resolvedDevice];
+
+        // Verify that a drive-local cwd was found and that it actually points
+        // to our drive. If not, default to the drive's root.
+        if (!path || path.substr(0, 3).toLowerCase() !==
+            resolvedDevice.toLowerCase() + '\\') {
+          path = resolvedDevice + '\\';
+        }
+      }
+
+      // Skip empty and invalid entries
+      if (!isString(path)) {
+        throw new TypeError('Arguments to path.resolve must be strings');
+      } else if (!path) {
+        continue;
+      }
+
+      const result = splitDeviceRe.exec(path);
+      const device = result[1] || '';
+      const isUnc = device && device.charAt(1) !== ':';
+      const isAbsolute = exports.isAbsolute(path);
+      const tail = result[3];
+
+      if (device &&
+          resolvedDevice &&
+          device.toLowerCase() !== resolvedDevice.toLowerCase()) {
+        // This path points to another device so it is not applicable
+        continue;
+      }
+
+      if (!resolvedDevice) {
+        resolvedDevice = device;
+      }
+
+      if (!resolvedAbsolute) {
+        resolvedTail = tail + '\\' + resolvedTail;
+        resolvedAbsolute = isAbsolute;
+      }
+
+      // Convert slashes to backslashes when `resolvedDevice` points to an UNC
+      // root. Also squash multiple slashes into a single one where appropriate.
+      if (isUnc) {
+        resolvedDevice = normalizeUNCRoot(resolvedDevice);
+      }
+
+      if (resolvedDevice && resolvedAbsolute) {
+        break;
+      }
+    }
+
+    // At this point the path should be resolved to a full absolute path,
+    // but handle relative paths to be safe (might happen when process.cwd()
+    // fails)
+
+    // Normalize the tail path
+    resolvedTail = normalizeArray(
+      resolvedTail.split(/[\\\/]+/),
+      !resolvedAbsolute
+    ).join('\\');
+
+    return (resolvedDevice + (resolvedAbsolute ? '\\' : '') + resolvedTail)
+           || '.';
+  };
+
+  // windows version
+  exports.normalize = function normalizeWIN32(path) {
+    const result = splitDeviceRe.exec(path);
+    let device = result[1] || '';
+    const isUnc = device && device.charAt(1) !== ':';
+    const isAbsolute = exports.isAbsolute(path);
+    let tail = result[3];
+    const trailingSlash = /[\\\/]$/.test(tail);
+
+    // Normalize the tail path
+    tail = normalizeArray(tail.split(/[\\\/]+/), !isAbsolute).join('\\');
+
+    if (!tail && !isAbsolute) {
+      tail = '.';
+    }
+    if (tail && trailingSlash) {
+      tail += '\\';
+    }
+
+    // Convert slashes to backslashes when `device` points to an UNC root.
+    // Also squash multiple slashes into a single one where appropriate.
+    if (isUnc) {
+      device = normalizeUNCRoot(device);
+    }
+
+    return device + (isAbsolute ? '\\' : '') + tail;
+  };
+
+  // windows version
+  exports.isAbsolute = function isAbsoluteWIN32(path) {
+    const result = splitDeviceRe.exec(path);
+    const device = result[1] || '';
+    const isUnc = !!device && device.charAt(1) !== ':';
+
+    // UNC paths are always absolute
+    return !!result[2] || isUnc;
+  };
+
+  // windows version
+  exports.join = function joinWIN32() {
+    function f(p) {
+      if (!isString(p)) {
+        throw new TypeError('Arguments to path.join must be strings');
+      }
+
+      return p;
+    }
+
+    const paths = Array.prototype.filter.call(arguments, f);
+    let joined = paths.join('\\');
+
+    // Make sure that the joined path doesn't start with two slashes, because
+    // normalize() will mistake it for an UNC path then.
+    //
+    // This step is skipped when it is very clear that the user actually
+    // intended to point at an UNC path. This is assumed when the first
+    // non-empty string arguments starts with exactly two slashes followed by
+    // at least one more non-slash character.
+    //
+    // Note that for normalize() to treat a path as an UNC path it needs to
+    // have at least 2 components, so we don't filter for that here.
+    // This means that the user can use join to construct UNC paths from
+    // a server name and a share name; for example:
+    //   path.join('//server', 'share') -> '\\\\server\\share\')
+    if (!/^[\\\/]{2}[^\\\/]/.test(paths[0])) {
+      joined = joined.replace(/^[\\\/]{2,}/, '\\');
+    }
+
+    return exports.normalize(joined);
+  };
+
+  // path.relative(from, to)
+  // it will solve the relative path from 'from' to 'to', for instance:
+  // from = 'C:\\orandea\\test\\aaa'
+  // to = 'C:\\orandea\\impl\\bbb'
+  // The output of the function should be: '..\\..\\impl\\bbb'
+  // windows version
+  exports.relative = function relativeWIN32(from, to) {
+    from = exports.resolve(from);
+    to = exports.resolve(to);
+
+    // windows is not case sensitive
+    const lowerFrom = from.toLowerCase();
+    const lowerTo = to.toLowerCase();
+
+    const toParts = trim(to.split('\\'));
+
+    const lowerFromParts = trim(lowerFrom.split('\\'));
+    const lowerToParts = trim(lowerTo.split('\\'));
+
+    const length = Math.min(lowerFromParts.length, lowerToParts.length);
+    let samePartsLength = length;
+
+    for (let i = 0; i < length; i++) {
+      if (lowerFromParts[i] !== lowerToParts[i]) {
+        samePartsLength = i;
+        break;
+      }
+    }
+
+    if (samePartsLength == 0) {
+      return to;
+    }
+
+    let outputParts = [];
+
+    for (let i = samePartsLength; i < lowerFromParts.length; i++) {
+      outputParts.push('..');
+    }
+
+    outputParts = outputParts.concat(toParts.slice(samePartsLength));
+
+    return outputParts.join('\\');
+  };
+
+} else /* posix */ {
+
+  // path.resolve([from ...], to)
+  // posix version
+  exports.resolve = function resolvePOSIX() {
+    let resolvedPath = '';
+    let resolvedAbsolute = false;
+
+    for (let i = arguments.length - 1; i >= -1 && !resolvedAbsolute; i--) {
+      const path = i >= 0 ? arguments[i] : process.cwd();
+
+      // Skip empty and invalid entries
+      if (!isString(path)) {
+        throw new TypeError('Arguments to path.resolve must be strings');
+      } else if (!path) {
+        continue;
+      }
+
+      resolvedPath = path + '/' + resolvedPath;
+      resolvedAbsolute = path.charAt(0) === '/';
+    }
+
+    // At this point the path should be resolved to a full absolute path, but
+    // handle relative paths to be safe (might happen when process.cwd() fails)
+
+    // Normalize the path
+    resolvedPath = normalizeArray(
+      resolvedPath.split('/'),
+      !resolvedAbsolute
+    ).join('/');
+
+    return ((resolvedAbsolute ? '/' : '') + resolvedPath) || '.';
+  };
+
+  // path.normalize(path)
+  // posix version
+  exports.normalize = function normalizePOSIX(path) {
+    const isAbsolute = exports.isAbsolute(path);
+    const trailingSlash = path[path.length - 1] === '/';
+
+    // normalize the path
+    path = normalizeArray(path.split('/'), !isAbsolute).join('/');
+
+    if (!path && !isAbsolute) {
+      path = '.';
+    }
+    if (path && trailingSlash) {
+      path += '/';
+    }
+
+    return (isAbsolute ? '/' : '') + path;
+  };
+
+  // posix version
+  exports.isAbsolute = function isAbsolutePOSIX(path) {
+    return path.charAt(0) === '/';
+  };
+
+  // posix version
+  exports.join = function joinPOSIX() {
+    let path = '';
+
+    for (let i = 0; i < arguments.length; i++) {
+      const segment = arguments[i];
+
+      if (!isString(segment)) {
+        throw new TypeError('Arguments to path.join must be strings');
+      }
+
+      if (segment) {
+        path += `${path ? '/' : ''}${segment}`;
+      }
+    }
+
+    return exports.normalize(path);
+  };
+
+  // path.relative(from, to)
+  // posix version
+  exports.relative = function relativePOSIX(from, to) {
+    from = exports.resolve(from).substr(1);
+    to = exports.resolve(to).substr(1);
+
+    const fromParts = trim(from.split('/'));
+    const toParts = trim(to.split('/'));
+
+    const length = Math.min(fromParts.length, toParts.length);
+    let samePartsLength = length;
+
+    for (let i = 0; i < length; i++) {
+      if (fromParts[i] !== toParts[i]) {
+        samePartsLength = i;
+        break;
+      }
+    }
+
+    let outputParts = [];
+
+    for (let i = samePartsLength; i < fromParts.length; i++) {
+      outputParts.push('..');
+    }
+
+    outputParts = outputParts.concat(toParts.slice(samePartsLength));
+
+    return outputParts.join('/');
+  };
+}
+
+exports.exists = util.deprecate(function exists(path, callback) {
+  return fs.exists(path, callback);
+}, 'path.exists is now called `fs.exists`.');
+
+exports.existsSync = util.deprecate(function existsSync(path) {
+  return fs.existsSync(path);
+}, 'path.existsSync is now called `fs.existsSync`.');
+
+if (IS_WINDOWS) {
+  exports._makeLong = function _makeLongWIN32(path) {
+    // Note: this will *probably* throw somewhere.
+    if (!isString(path)) { return path; }
+    if (!path) { return ''; }
+
+    const resolvedPath = exports.resolve(path);
+
+    if (/^[a-zA-Z]\:\\/.test(resolvedPath)) {
+      // path is local filesystem path, which needs to be converted
+      // to long UNC path.
+      return '\\\\?\\' + resolvedPath;
+    } else if (/^\\\\[^?.]/.test(resolvedPath)) {
+      // path is network UNC path, which needs to be converted
+      // to long UNC path.
+      return '\\\\?\\UNC\\' + resolvedPath.substring(2);
+    }
+
+    return path;
+  };
+
+} else {
+  exports._makeLong = function _makeLongPOSIX(path) {
+    return path;
+  };
+}
+
+exports.extname = function _extname(filename) {
+  if (!filename) { return ''; }
+
+  // /a.js///
+  let end = filename.length;
+  let c = filename[end - 1];
+
+  while (c === exports.sep || c === '/') {
+    end--;
+    c = filename[end - 1];
+  }
+
+  let lastDot = -1;
+  let lastSep = -1;
+
+  for (let i = end; i--;) {
+    const ch = filename[i];
+
+    if (lastDot === -1 && ch === '.') {
+      lastDot = i;
+    } else if (lastSep === -1 && ch === '/') {
+      lastSep = i;
+    } else if (IS_WINDOWS && lastSep === -1 && ch === '\\') {
+      lastSep = i;
+    }
+
+    // /xxx
+    if (lastSep !== -1 && lastDot === -1) { return ''; }
+    // /*.js
+    if (lastDot !== -1 && i === lastDot - 2) { break; }
+    // /.js
+    if (lastSep !== -1 && lastDot !== -1) { break; }
+  }
+
+  // ./js and /.js
+  if (lastDot < lastSep + 2) { return ''; }
+
+  const extname = filename.slice(lastDot, end);
+
+  if (extname === '.' && filename[lastDot - 1] === '.') {
+    // ..
+    if (lastDot === 1) { return ''; }
+
+    const pre = filename[lastDot - 2];
+    // [//\/]..
+    if (pre === '/' || pre === exports.sep) { return ''; }
+  }
+
+  return extname;
+};
+
+exports.basename = function _basename(filename, ext) {
+  if (!filename) { return ''; }
+
+  // /a.js///
+  let end = filename.length;
+  let c = filename[end - 1];
+
+  while (c === exports.sep || c === '/') {
+    end--;
+    c = filename[end - 1];
+  }
+
+  let lastSep = -1;
+
+  for (let i = end; i--;) {
+    const ch = filename[i];
+
+    if (lastSep === -1 && ch === '/') {
+      lastSep = i;
+      break;
+    }
+
+    if (IS_WINDOWS && lastSep === -1 && ch === '\\') {
+      lastSep = i;
+      break;
+    }
+  }
+
+  const basename = filename.slice(lastSep + 1, end);
+
+  if (ext) {
+    const match = basename.lastIndexOf(ext);
+
+    if (match === -1 || match !== basename.length - ext.length) {
+      return basename;
+    }
+
+    return basename.slice(0, basename.length - ext.length);
+  }
+
+  return basename;
+};
+
+exports.dirname = function _dirname(filename) {
+  if (!filename) { return '.'; }
+
+  let start = 0;
+  let device = '';
+
+  if (IS_WINDOWS) {
+    // need to get device in windows
+    device = getDevice(filename);
+
+    if (device) { start = device.length; }
+  }
+
+  // /a.js///
+  let end = filename.length;
+  let c = filename[end - 1];
+
+  while (end >= start && c === exports.sep || c === '/') {
+    end--;
+    c = filename[end - 1];
+  }
+
+  let lastSep = -1;
+
+  for (let i = end; i-- > start;) {
+    const ch = filename[i];
+
+    if (lastSep === -1 && ch === '/') {
+      lastSep = i;
+      break;
+    }
+
+    if (IS_WINDOWS && lastSep === -1 && ch === '\\') {
+      lastSep = i;
+      break;
+    }
+  }
+
+  if (lastSep <= start) {
+    if (device) { return device; }
+    if (filename[0] === '/' || filename[0] === exports.sep) { return filename[0]; }
+
+    return '.';
+  }
+
+  return device + filename.slice(start, lastSep);
+};
+
+exports.replace = function(props) {
+  if (!props) { props = all; }
+  if (!Array.isArray(props)) { props = [props]; }
+
+  props.forEach(function(name) {
+    if (exports[name]) { path[name] = exports[name]; }
+  });
+};

react-packager/src/node-haste/index.js

@@ -0,0 +1,332 @@
+ /**
+ * 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.
+ */
+'use strict';
+
+const Cache = require('./Cache');
+const Fastfs = require('./fastfs');
+const FileWatcher = require('./FileWatcher');
+const Module = require('./Module');
+const ModuleCache = require('./ModuleCache');
+const Polyfill = require('./Polyfill');
+const crawl = require('./crawlers');
+const extractRequires = require('./lib/extractRequires');
+const getAssetDataFromName = require('./lib/getAssetDataFromName');
+const getInverseDependencies = require('./lib/getInverseDependencies');
+const getPlatformExtension = require('./lib/getPlatformExtension');
+const isAbsolutePath = require('absolute-path');
+const replacePatterns = require('./lib/replacePatterns');
+const path = require('./fastpath');
+const util = require('util');
+const DependencyGraphHelpers = require('./DependencyGraph/DependencyGraphHelpers');
+const ResolutionRequest = require('./DependencyGraph/ResolutionRequest');
+const ResolutionResponse = require('./DependencyGraph/ResolutionResponse');
+const HasteMap = require('./DependencyGraph/HasteMap');
+const DeprecatedAssetMap = require('./DependencyGraph/DeprecatedAssetMap');
+
+const ERROR_BUILDING_DEP_GRAPH = 'DependencyGraphError';
+
+const defaultActivity = {
+  startEvent: () => {},
+  endEvent: () => {},
+};
+
+class DependencyGraph {
+  constructor({
+    activity,
+    roots,
+    ignoreFilePath,
+    fileWatcher,
+    assetRoots_DEPRECATED,
+    assetExts,
+    providesModuleNodeModules,
+    platforms,
+    preferNativePlatform,
+    cache,
+    extensions,
+    mocksPattern,
+    extractRequires,
+    transformCode,
+    shouldThrowOnUnresolvedErrors = () => true,
+    enableAssetMap,
+    assetDependencies,
+    moduleOptions,
+    extraNodeModules,
+  }) {
+    this._opts = {
+      activity: activity || defaultActivity,
+      roots,
+      ignoreFilePath: ignoreFilePath || (() => {}),
+      fileWatcher,
+      assetRoots_DEPRECATED: assetRoots_DEPRECATED || [],
+      assetExts: assetExts || [],
+      providesModuleNodeModules,
+      platforms: new Set(platforms || []),
+      preferNativePlatform: preferNativePlatform || false,
+      extensions: extensions || ['js', 'json'],
+      mocksPattern,
+      extractRequires,
+      transformCode,
+      shouldThrowOnUnresolvedErrors,
+      enableAssetMap: enableAssetMap || true,
+      moduleOptions: moduleOptions || {
+        cacheTransformResults: true,
+      },
+      extraNodeModules,
+    };
+    this._cache = cache;
+    this._assetDependencies = assetDependencies;
+    this._helpers = new DependencyGraphHelpers(this._opts);
+    this.load();
+  }
+
+  load() {
+    if (this._loading) {
+      return this._loading;
+    }
+
+    const {activity} = this._opts;
+    const depGraphActivity = activity.startEvent('Building Dependency Graph');
+    const crawlActivity = activity.startEvent('Crawling File System');
+    const allRoots = this._opts.roots.concat(this._opts.assetRoots_DEPRECATED);
+    this._crawling = crawl(allRoots, {
+      ignore: this._opts.ignoreFilePath,
+      exts: this._opts.extensions.concat(this._opts.assetExts),
+      fileWatcher: this._opts.fileWatcher,
+    });
+    this._crawling.then((files) => activity.endEvent(crawlActivity));
+
+    this._fastfs = new Fastfs(
+      'JavaScript',
+      this._opts.roots,
+      this._opts.fileWatcher,
+      {
+        ignore: this._opts.ignoreFilePath,
+        crawling: this._crawling,
+        activity: activity,
+      }
+    );
+
+    this._fastfs.on('change', this._processFileChange.bind(this));
+
+    this._moduleCache = new ModuleCache({
+      fastfs: this._fastfs,
+      cache: this._cache,
+      extractRequires: this._opts.extractRequires,
+      transformCode: this._opts.transformCode,
+      depGraphHelpers: this._helpers,
+      assetDependencies: this._assetDependencies,
+      moduleOptions: this._opts.moduleOptions,
+    }, this._opts.platfomrs);
+
+    this._hasteMap = new HasteMap({
+      fastfs: this._fastfs,
+      extensions: this._opts.extensions,
+      moduleCache: this._moduleCache,
+      preferNativePlatform: this._opts.preferNativePlatform,
+      helpers: this._helpers,
+      platforms: this._opts.platforms,
+    });
+
+    this._deprecatedAssetMap = new DeprecatedAssetMap({
+      fsCrawl: this._crawling,
+      roots: this._opts.assetRoots_DEPRECATED,
+      helpers: this._helpers,
+      fileWatcher: this._opts.fileWatcher,
+      ignoreFilePath: this._opts.ignoreFilePath,
+      assetExts: this._opts.assetExts,
+      activity: this._opts.activity,
+      enabled: this._opts.enableAssetMap,
+      platforms: this._opts.platforms,
+    });
+
+    this._loading = Promise.all([
+      this._fastfs.build()
+        .then(() => {
+          const hasteActivity = activity.startEvent('Building Haste Map');
+          return this._hasteMap.build().then(map => {
+            activity.endEvent(hasteActivity);
+            return map;
+          });
+        }),
+      this._deprecatedAssetMap.build(),
+    ]).then(
+      response => {
+        activity.endEvent(depGraphActivity);
+        return response[0]; // Return the haste map
+      },
+      err => {
+        const error = new Error(
+          `Failed to build DependencyGraph: ${err.message}`
+        );
+        error.type = ERROR_BUILDING_DEP_GRAPH;
+        error.stack = err.stack;
+        throw error;
+      }
+    );
+
+    return this._loading;
+  }
+
+  /**
+   * Returns a promise with the direct dependencies the module associated to
+   * the given entryPath has.
+   */
+  getShallowDependencies(entryPath, transformOptions) {
+    return this._moduleCache
+      .getModule(entryPath)
+      .getDependencies(transformOptions);
+  }
+
+  getFS() {
+    return this._fastfs;
+  }
+
+  /**
+   * Returns the module object for the given path.
+   */
+  getModuleForPath(entryFile) {
+    return this._moduleCache.getModule(entryFile);
+  }
+
+  getAllModules() {
+    return this.load().then(() => this._moduleCache.getAllModules());
+  }
+
+  getDependencies({
+    entryPath,
+    platform,
+    transformOptions,
+    onProgress,
+    recursive = true,
+  }) {
+    return this.load().then(() => {
+      platform = this._getRequestPlatform(entryPath, platform);
+      const absPath = this._getAbsolutePath(entryPath);
+      const req = new ResolutionRequest({
+        platform,
+        platforms: this._opts.platforms,
+        preferNativePlatform: this._opts.preferNativePlatform,
+        entryPath: absPath,
+        deprecatedAssetMap: this._deprecatedAssetMap,
+        hasteMap: this._hasteMap,
+        helpers: this._helpers,
+        moduleCache: this._moduleCache,
+        fastfs: this._fastfs,
+        shouldThrowOnUnresolvedErrors: this._opts.shouldThrowOnUnresolvedErrors,
+        extraNodeModules: this._opts.extraNodeModules,
+      });
+
+      const response = new ResolutionResponse({transformOptions});
+
+      return req.getOrderedDependencies({
+        response,
+        mocksPattern: this._opts.mocksPattern,
+        transformOptions,
+        onProgress,
+        recursive,
+      }).then(() => response);
+    });
+  }
+
+  matchFilesByPattern(pattern) {
+    return this.load().then(() => this._fastfs.matchFilesByPattern(pattern));
+  }
+
+  _getRequestPlatform(entryPath, platform) {
+    if (platform == null) {
+      platform = getPlatformExtension(entryPath, this._opts.platforms);
+    } else if (!this._opts.platforms.has(platform)) {
+      throw new Error('Unrecognized platform: ' + platform);
+    }
+    return platform;
+  }
+
+  _getAbsolutePath(filePath) {
+    if (isAbsolutePath(filePath)) {
+      return path.resolve(filePath);
+    }
+
+    for (let i = 0; i < this._opts.roots.length; i++) {
+      const root = this._opts.roots[i];
+      const potentialAbsPath = path.join(root, filePath);
+      if (this._fastfs.fileExists(potentialAbsPath)) {
+        return path.resolve(potentialAbsPath);
+      }
+    }
+
+    throw new NotFoundError(
+      'Cannot find entry file %s in any of the roots: %j',
+      filePath,
+      this._opts.roots
+    );
+  }
+
+  _processFileChange(type, filePath, root, fstat) {
+    const absPath = path.join(root, filePath);
+    if (fstat && fstat.isDirectory() ||
+        this._opts.ignoreFilePath(absPath) ||
+        this._helpers.isNodeModulesDir(absPath)) {
+      return;
+    }
+
+    // Ok, this is some tricky promise code. Our requirements are:
+    // * we need to report back failures
+    // * failures shouldn't block recovery
+    // * Errors can leave `hasteMap` in an incorrect state, and we need to rebuild
+    // After we process a file change we record any errors which will also be
+    // reported via the next request. On the next file change, we'll see that
+    // we are in an error state and we should decide to do a full rebuild.
+    const resolve = () => {
+      if (this._hasteMapError) {
+        console.warn(
+          'Rebuilding haste map to recover from error:\n' +
+          this._hasteMapError.stack
+        );
+        this._hasteMapError = null;
+
+        // Rebuild the entire map if last change resulted in an error.
+        this._loading = this._hasteMap.build();
+      } else {
+        this._loading = this._hasteMap.processFileChange(type, absPath);
+        this._loading.catch((e) => this._hasteMapError = e);
+      }
+      return this._loading;
+    };
+    this._loading = this._loading.then(resolve, resolve);
+  }
+
+  createPolyfill(options) {
+    return this._moduleCache.createPolyfill(options);
+  }
+}
+
+Object.assign(DependencyGraph, {
+  Cache,
+  Fastfs,
+  FileWatcher,
+  Module,
+  Polyfill,
+  extractRequires,
+  getAssetDataFromName,
+  getPlatformExtension,
+  replacePatterns,
+  getInverseDependencies,
+});
+
+function NotFoundError() {
+  Error.call(this);
+  Error.captureStackTrace(this, this.constructor);
+  var msg = util.format.apply(util, arguments);
+  this.message = msg;
+  this.type = this.name = 'NotFoundError';
+  this.status = 404;
+}
+util.inherits(NotFoundError, Error);
+
+module.exports = DependencyGraph;

react-packager/src/node-haste/lib/AsyncTaskGroup.js

@@ -0,0 +1,28 @@
+ /**
+ * Copyright (c) 2016-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.
+ */
+'use strict';
+
+module.exports = class AsyncTaskGroup {
+  constructor() {
+    this._runningTasks = new Set();
+    this._resolve = null;
+    this.done = new Promise(resolve => this._resolve = resolve);
+  }
+
+  start(taskHandle) {
+    this._runningTasks.add(taskHandle);
+  }
+
+  end(taskHandle) {
+    const runningTasks = this._runningTasks;
+    if (runningTasks.delete(taskHandle) && runningTasks.size === 0) {
+      this._resolve();
+    }
+  }
+};

react-packager/src/node-haste/lib/MapWithDefaults.js

@@ -0,0 +1,30 @@
+ /**
+ * Copyright (c) 2016-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.
+ */
+'use strict';
+
+module.exports = function MapWithDefaults(factory, iterable) {
+  // This can't be `MapWithDefaults extends Map`, b/c the way babel transforms
+  // super calls in constructors: Map.call(this, iterable) throws for native
+  // Map objects in node 4+.
+  // TODO(davidaurelio) switch to a transform that does not transform classes
+  // and super calls, and change this into a class
+
+  const map = iterable ? new Map(iterable) : new Map();
+  const {get} = map;
+  map.get = key => {
+    if (map.has(key)) {
+      return get.call(map, key);
+    }
+
+    const value = factory(key);
+    map.set(key, value);
+    return value;
+  };
+  return map;
+};

react-packager/src/node-haste/lib/__tests__/extractRequires-test.js

@@ -0,0 +1,106 @@
+/**
+ * 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.
+ */
+'use strict';
+
+jest.dontMock('../extractRequires');
+jest.dontMock('../replacePatterns');
+
+const extractRequires = require('../extractRequires');
+
+describe('extractRequires', () => {
+  it('should extract both requires and imports from code', () => {
+    const code = `
+      import module1 from 'module1';
+      const module2 = require('module2');
+      const module3 = require(\`module3\`);
+    `;
+
+    expect(extractRequires(code)).toEqual({
+      code,
+      deps: {sync: ['module1', 'module2', 'module3']},
+    });
+  });
+
+  it('should extract requires in order', () => {
+    const code = `
+      const module1 = require('module1');
+      const module2 = require('module2');
+      const module3 = require('module3');
+    `;
+
+    expect(extractRequires(code)).toEqual({
+      code,
+      deps: {sync: ['module1', 'module2', 'module3']},
+    });
+  });
+
+  it('should strip out comments from code', () => {
+    const code = '// comment';
+
+    expect(extractRequires(code)).toEqual({
+      code: '',
+      deps: {sync: []},
+    });
+  });
+
+  it('should ignore requires in comments', () => {
+    const code = [
+      '// const module1 = require("module1");',
+      '/**',
+      ' * const module2 = require("module2");',
+      ' */',
+    ].join('\n');
+
+    expect(extractRequires(code)).toEqual({
+      code: '\n',
+      deps: {sync: []},
+    });
+  });
+
+  it('should ignore requires in comments with Windows line endings', () => {
+    const code = [
+      '// const module1 = require("module1");',
+      '/**',
+      ' * const module2 = require("module2");',
+      ' */',
+    ].join('\r\n');
+
+    expect(extractRequires(code)).toEqual({
+      code: '\r\n',
+      deps: {sync: []},
+    });
+  });
+
+  it('should ignore requires in comments with unicode line endings', () => {
+    const code = [
+      '// const module1 = require("module1");\u2028',
+      '// const module1 = require("module2");\u2029',
+      '/*\u2028',
+      'const module2 = require("module3");\u2029',
+      ' */',
+    ].join('');
+
+    expect(extractRequires(code)).toEqual({
+      code: '\u2028\u2029',
+      deps: {sync: []},
+    });
+  });
+
+  it('should dedup duplicated requires', () => {
+    const code = `
+      const module1 = require('module1');
+      const module1Dup = require('module1');
+    `;
+
+    expect(extractRequires(code)).toEqual({
+      code,
+      deps: {sync: ['module1']},
+    });
+  });
+});

react-packager/src/node-haste/lib/__tests__/getAssetDataFromName-test.js

@@ -0,0 +1,119 @@
+/**
+ * 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.
+ */
+'use strict';
+
+jest.dontMock('../getPlatformExtension')
+    .dontMock('../getAssetDataFromName');
+
+var getAssetDataFromName = require('../getAssetDataFromName');
+
+describe('getAssetDataFromName', () => {
+  it('should get data from name', () => {
+    expect(getAssetDataFromName('a/b/c.png')).toEqual({
+      resolution: 1,
+      assetName: 'a/b/c.png',
+      type: 'png',
+      name: 'c',
+      platform: null,
+    });
+
+    expect(getAssetDataFromName('a/b/c@1x.png')).toEqual({
+      resolution: 1,
+      assetName: 'a/b/c.png',
+      type: 'png',
+      name: 'c',
+      platform: null,
+    });
+
+    expect(getAssetDataFromName('a/b/c@2.5x.png')).toEqual({
+      resolution: 2.5,
+      assetName: 'a/b/c.png',
+      type: 'png',
+      name: 'c',
+      platform: null,
+    });
+
+    expect(getAssetDataFromName('a/b/c.ios.png')).toEqual({
+      resolution: 1,
+      assetName: 'a/b/c.png',
+      type: 'png',
+      name: 'c',
+      platform: 'ios',
+    });
+
+    expect(getAssetDataFromName('a/b/c@1x.ios.png')).toEqual({
+      resolution: 1,
+      assetName: 'a/b/c.png',
+      type: 'png',
+      name: 'c',
+      platform: 'ios',
+    });
+
+    expect(getAssetDataFromName('a/b/c@2.5x.ios.png')).toEqual({
+      resolution: 2.5,
+      assetName: 'a/b/c.png',
+      type: 'png',
+      name: 'c',
+      platform: 'ios',
+    });
+  });
+
+  describe('resolution extraction', () => {
+    it('should extract resolution simple case', () =>  {
+      var data = getAssetDataFromName('test@2x.png');
+      expect(data).toEqual({
+        assetName: 'test.png',
+        resolution: 2,
+        type: 'png',
+        name: 'test',
+        platform: null,
+      });
+    });
+
+    it('should default resolution to 1', () =>  {
+      var data = getAssetDataFromName('test.png');
+      expect(data).toEqual({
+        assetName: 'test.png',
+        resolution: 1,
+        type: 'png',
+        name: 'test',
+        platform: null,
+      });
+    });
+
+    it('should support float', () =>  {
+      var data = getAssetDataFromName('test@1.1x.png');
+      expect(data).toEqual({
+        assetName: 'test.png',
+        resolution: 1.1,
+        type: 'png',
+        name: 'test',
+        platform: null,
+      });
+
+      data = getAssetDataFromName('test@.1x.png');
+      expect(data).toEqual({
+        assetName: 'test.png',
+        resolution: 0.1,
+        type: 'png',
+        name: 'test',
+        platform: null,
+      });
+
+      data = getAssetDataFromName('test@0.2x.png');
+      expect(data).toEqual({
+        assetName: 'test.png',
+        resolution: 0.2,
+        type: 'png',
+        name: 'test',
+        platform: null,
+      });
+    });
+  });
+});

react-packager/src/node-haste/lib/__tests__/getInverseDependencies-test.js

@@ -0,0 +1,55 @@
+/**
+ * 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.
+ */
+'use strict';
+
+jest.dontMock('../getInverseDependencies');
+
+const getInverseDependencies = require('../getInverseDependencies');
+
+describe('getInverseDependencies', () => {
+  it('', () => {
+    const module1 = createModule('module1', ['module2', 'module3']);
+    const module2 = createModule('module2', ['module3', 'module4']);
+    const module3 = createModule('module3', ['module4']);
+    const module4 = createModule('module4', []);
+
+    const modulePairs = {
+      'module1': [['module2', module2], ['module3', module3]],
+      'module2': [['module3', module3], ['module4', module4]],
+      'module3': [['module4', module4]],
+      'module4': [],
+    };
+
+    const resolutionResponse = {
+      dependencies: [module1, module2, module3, module4],
+      getResolvedDependencyPairs: (module) => {
+        return modulePairs[module.hash()];
+      },
+    };
+
+    const dependencies = getInverseDependencies(resolutionResponse);
+    const actual = // jest can't compare maps and sets
+      Array.from(dependencies.entries())
+        .map(([key, value]) => [key, Array.from(value)]);
+
+    expect(actual).toEqual([
+      [module2, [module1]],
+      [module3, [module1, module2]],
+      [module4, [module2, module3]],
+    ]);
+  });
+});
+
+function createModule(name, dependencies) {
+  return {
+    hash: () => name,
+    getName: () => Promise.resolve(name),
+    getDependencies: () => Promise.resolve(dependencies),
+  };
+}

react-packager/src/node-haste/lib/__tests__/getPlatformExtension-test.js

@@ -0,0 +1,33 @@
+/**
+ * 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.
+ */
+'use strict';
+
+jest.dontMock('../getPlatformExtension');
+
+var getPlatformExtension = require('../getPlatformExtension');
+
+describe('getPlatformExtension', function() {
+  it('should get platform ext', function() {
+    expect(getPlatformExtension('a.ios.js')).toBe('ios');
+    expect(getPlatformExtension('a.android.js')).toBe('android');
+    expect(getPlatformExtension('/b/c/a.ios.js')).toBe('ios');
+    expect(getPlatformExtension('/b/c.android/a.ios.js')).toBe('ios');
+    expect(getPlatformExtension('/b/c/a@1.5x.ios.png')).toBe('ios');
+    expect(getPlatformExtension('/b/c/a@1.5x.lol.png')).toBe(null);
+    expect(getPlatformExtension('/b/c/a.lol.png')).toBe(null);
+  });
+
+  it('should optionally accept supported platforms', function() {
+    expect(getPlatformExtension('a.ios.js', new Set(['ios']))).toBe('ios');
+    expect(getPlatformExtension('a.android.js', new Set(['android']))).toBe('android');
+    expect(getPlatformExtension('/b/c/a.ios.js', new Set(['ios', 'android']))).toBe('ios');
+    expect(getPlatformExtension('a.ios.js', new Set(['ubuntu']))).toBe(null);
+    expect(getPlatformExtension('a.ubuntu.js', new Set(['ubuntu']))).toBe('ubuntu');
+  });
+});

react-packager/src/node-haste/lib/extractRequires.js

@@ -0,0 +1,55 @@
+/**
+ * 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.
+ */
+'use strict';
+
+const replacePatterns = require('./replacePatterns');
+
+/**
+ * Extract all required modules from a `code` string.
+ */
+const blockCommentRe = /\/\*[^]*?\*\//g;
+const lineCommentRe = /\/\/.*/g;
+function extractRequires(code) {
+  const cache = Object.create(null);
+  var deps = {
+    sync: [],
+  };
+
+  const addDependency = (dep) => {
+    if (!cache[dep]) {
+      cache[dep] = true;
+      deps.sync.push(dep);
+    }
+  };
+
+  code = code
+    .replace(blockCommentRe, '')
+    .replace(lineCommentRe, '')
+    // Parse the sync dependencies this module has. When the module is
+    // required, all it's sync dependencies will be loaded into memory.
+    // Sync dependencies can be defined either using `require` or the ES6
+    // `import` or `export` syntaxes:
+    //   var dep1 = require('dep1');
+    .replace(replacePatterns.IMPORT_RE, (match, pre, quot, dep, post) => {
+      addDependency(dep);
+      return match;
+    })
+    .replace(replacePatterns.EXPORT_RE, (match, pre, quot, dep, post) => {
+      addDependency(dep);
+      return match;
+    })
+    .replace(replacePatterns.REQUIRE_RE, (match, pre, quot, dep, post) => {
+      addDependency(dep);
+      return match;
+    });
+
+  return {code, deps};
+}
+
+module.exports = extractRequires;

react-packager/src/node-haste/lib/getAssetDataFromName.js

@@ -0,0 +1,55 @@
+ /**
+ * 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.
+ */
+'use strict';
+
+const path = require('../fastpath');
+const getPlatformExtension = require('./getPlatformExtension');
+
+function getAssetDataFromName(filename, platforms) {
+  const ext = path.extname(filename);
+  const platformExt = getPlatformExtension(filename, platforms);
+
+  let pattern = '@([\\d\\.]+)x';
+  if (platformExt != null) {
+    pattern += '(\\.' + platformExt + ')?';
+  }
+  pattern += '\\' + ext + '$';
+  const re = new RegExp(pattern);
+
+  const match = filename.match(re);
+  let resolution;
+
+  if (!(match && match[1])) {
+    resolution = 1;
+  } else {
+    resolution = parseFloat(match[1], 10);
+    if (isNaN(resolution)) {
+      resolution = 1;
+    }
+  }
+
+  let assetName;
+  if (match) {
+    assetName = filename.replace(re, ext);
+  } else if (platformExt != null) {
+    assetName = filename.replace(new RegExp(`\\.${platformExt}\\${ext}`), ext);
+  } else {
+    assetName = filename;
+  }
+
+  return {
+    resolution: resolution,
+    assetName: assetName,
+    type: ext.slice(1),
+    name: path.basename(assetName, ext),
+    platform: platformExt,
+  };
+}
+
+module.exports = getAssetDataFromName;

react-packager/src/node-haste/lib/getInverseDependencies.js

@@ -0,0 +1,42 @@
+/**
+ * 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.
+ */
+'use strict';
+
+function resolveModuleRequires(resolutionResponse, module) {
+  const pairs = resolutionResponse.getResolvedDependencyPairs(module);
+  return pairs
+    ? pairs.map(([, dependencyModule]) => dependencyModule)
+    : [];
+}
+
+function getModuleDependents(cache, module) {
+  let dependents = cache.get(module);
+  if (!dependents) {
+    dependents = new Set();
+    cache.set(module, dependents);
+  }
+  return dependents;
+}
+
+/**
+ * Returns an object that indicates in which module each module is required.
+ */
+function getInverseDependencies(resolutionResponse) {
+  const cache = new Map();
+
+  resolutionResponse.dependencies.forEach(module => {
+    resolveModuleRequires(resolutionResponse, module).forEach(dependency => {
+      getModuleDependents(cache, dependency).add(module);
+    });
+  });
+
+  return cache;
+}
+
+module.exports = getInverseDependencies;

react-packager/src/node-haste/lib/getPlatformExtension.js

@@ -0,0 +1,28 @@
+/**
+ * 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.
+ */
+'use strict';
+
+const SUPPORTED_PLATFORM_EXTS = new Set([
+  'android',
+  'ios',
+  'web',
+]);
+
+// Extract platform extension: index.ios.js -> ios
+function getPlatformExtension(file, platforms = SUPPORTED_PLATFORM_EXTS) {
+  const last = file.lastIndexOf('.');
+  const secondToLast = file.lastIndexOf('.', last - 1);
+  if (secondToLast === -1) {
+    return null;
+  }
+  const platform = file.substring(secondToLast + 1, last);
+  return platforms.has(platform) ? platform : null;
+}
+
+module.exports = getPlatformExtension;

react-packager/src/node-haste/lib/replacePatterns.js

@@ -0,0 +1,14 @@
+/**
+ * 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.
+ */
+
+'use strict';
+
+exports.IMPORT_RE = /(\bimport\s+(?:[^'"]+\s+from\s+)??)(['"])([^'"]+)(\2)/g;
+exports.EXPORT_RE = /(\bexport\s+(?:[^'"]+\s+from\s+)??)(['"])([^'"]+)(\2)/g;
+exports.REQUIRE_RE = /(\brequire\s*?\(\s*?)(['"`])([^'"`]+)(\2\s*?\))/g;