Configured Flow, Jest and Metro to use module names from filenames

.flowconfig

@@ -36,6 +36,23 @@ flow-github/
 emoji=true
 
 module.system=haste
+module.system.haste.use_name_reducers=true
+# keep the following in sync with server/haste/hasteImpl.js
+# get basename
+module.system.haste.name_reducers='^.*/\([a-zA-Z0-9$_.-]+\.js\(\.flow\)?\)$' -> '\1'
+# strip .js or .js.flow suffix
+module.system.haste.name_reducers='^\(.*\)\.js\(\.flow\)?$' -> '\1'
+# strip .ios suffix
+module.system.haste.name_reducers='^\(.*\)\.ios$' -> '\1'
+module.system.haste.name_reducers='^\(.*\)\.android$' -> '\1'
+module.system.haste.name_reducers='^\(.*\)\.native$' -> '\1'
+module.system.haste.paths.blacklist=.*/__tests__/.*
+module.system.haste.paths.blacklist=.*/__mocks__/.*
+module.system.haste.paths.blacklist=<PROJECT_ROOT>/Libraries/Animated/src/polyfills/.*
+module.system.haste.paths.whitelist=<PROJECT_ROOT>/Libraries/.*
+module.system.haste.paths.whitelist=<PROJECT_ROOT>/RNTester/.*
+module.system.haste.paths.whitelist=<PROJECT_ROOT>/IntegrationTests/.*
+module.system.haste.paths.blacklist=<PROJECT_ROOT>/Libraries/Animated/src/polyfills/.*
 
 munge_underscores=true
 

jest/hasteImpl.js

@@ -0,0 +1,75 @@
+/**
+ * Copyright (c) 2014-present, Facebook, Inc.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow
+ */
+
+'use strict';
+
+const path = require('path');
+
+const ROOT = path.join(__dirname, '..');
+
+const BLACKLISTED_PATTERNS/*: Array<RegExp>*/ = [
+  /.*\/__(mocks|tests)__\/.*/,
+  /^Libraries\/Animated\/src\/polyfills\/.*/,
+];
+
+const WHITELISTED_PREFIXES/*: Array<string>*/ = [
+  'IntegrationTests',
+  'Libraries',
+  'ReactAndroid',
+  'RNTester',
+];
+
+const NAME_REDUCERS/*: Array<[RegExp, string]>*/ = [
+  // extract basename
+  [/^(?:.*\/)?([a-zA-Z0-9$_.-]+)$/, '$1'],
+  // strip .js/.js.flow suffix
+  [/^(.*)\.js(\.flow)?$/, '$1'],
+  // strip .android/.ios/.native/.web suffix
+  [/^(.*)\.(android|ios|native|web)$/, '$1'],
+];
+
+const haste = {
+  /*
+   * @return {string|void} hasteName for module at filePath; or undefined if
+   *                       filePath is not a haste module
+   */
+  getHasteName(
+    filePath/*: string*/,
+    sourceCode/* : ?string*/
+  )/*: (string | void)*/ {
+    if (!isHastePath(filePath)) {
+      return undefined;
+    }
+
+    const hasteName = NAME_REDUCERS.reduce(
+      (name, [pattern, replacement]) => name.replace(pattern, replacement),
+      filePath
+    );
+
+    return hasteName;
+  },
+};
+
+function isHastePath(filePath/*: string*/)/*: bool*/ {
+  if (!filePath.endsWith('.js') && !filePath.endsWith('.js.flow')) {
+    return false;
+  }
+
+  if (!filePath.startsWith(ROOT)) {
+    return false;
+  }
+
+  filePath = filePath.substr(ROOT.length + 1);
+  if (BLACKLISTED_PATTERNS.some(pattern => pattern.test(filePath))) {
+    return false;
+  }
+  return WHITELISTED_PREFIXES.some(prefix => filePath.startsWith(prefix));
+}
+
+module.exports = haste;

local-cli/core/index.js

@@ -68,6 +68,8 @@ const pluginPlatforms = plugins
 
 const defaultRNConfig = {
 
+  hasteImplModulePath: require.resolve('../../jest/hasteImpl'),
+
   getProjectCommands(): Array<CommandT> {
     const commands = plugins
       .commands

package.json

@@ -37,6 +37,7 @@
     ],
     "haste": {
       "defaultPlatform": "ios",
+      "hasteImplModulePath": "<rootDir>/jest/hasteImpl.js",
       "providesModuleNodeModules": [
         "react-native"
       ],