Bugfix/require module regexp

Summary:
Resolves https://github.com/facebook/react-native/issues/316. Also updated the spec for the Haste Dependency Resolver. Not sure if these changes are the ones desired so feedback would be welcome!
Closes https://github.com/facebook/react-native/pull/368
Github Author: daviskoh <koh.davis.0@gmail.com>

Test Plan: ./runJestTests

react-packager/src/DependencyResolver/haste/DependencyGraph/__tests__/DependencyGraph-test.js

@@ -14,6 +14,7 @@ jest
   .dontMock('path')
   .dontMock('absolute-path')
   .dontMock('../docblock')
+  .dontMock('../../requirePattern')
   .setMock('../../../ModuleDescriptor', function(data) {return data;});
 
 describe('DependencyGraph', function() {

react-packager/src/DependencyResolver/haste/DependencyGraph/index.js

@@ -12,6 +12,7 @@ var ModuleDescriptor = require('../../ModuleDescriptor');
 var q = require('q');
 var fs = require('fs');
 var docblock = require('./docblock');
+var requirePattern = require('../requirePattern');
 var path = require('path');
 var isAbsolutePath = require('absolute-path');
 var debug = require('debug')('DependecyGraph');
@@ -600,7 +601,6 @@ DependecyGraph.prototype._processAssetChange = function(eventType, file) {
 /**
  * Extract all required modules from a `code` string.
  */
-var requireRe = /\brequire\s*\(\s*[\'"]([^"\']+)["\']\s*\)/g;
 var blockCommentRe = /\/\*(.|\n)*?\*\//g;
 var lineCommentRe = /\/\/.+(\n|$)/g;
 function extractRequires(code) {
@@ -609,7 +609,7 @@ function extractRequires(code) {
   code
     .replace(blockCommentRe, '')
     .replace(lineCommentRe, '')
-    .replace(requireRe, function(match, dep) {
+    .replace(requirePattern, function(match, _, dep) {
       deps.push(dep);
     });
 

react-packager/src/DependencyResolver/haste/__tests__/HasteDependencyResolver-test.js

@@ -10,6 +10,7 @@
 
 jest.dontMock('../')
     .dontMock('q')
+    .dontMock('../requirePattern')
     .setMock('../../ModuleDescriptor', function(data) {return data;});
 
 var q = require('q');
@@ -226,11 +227,13 @@ describe('HasteDependencyResolver', function() {
       });
 
       var depGraph = depResolver._depGraph;
-      var dependencies = ['x', 'y', 'z'];
+      var dependencies = ['x', 'y', 'z', 'a', 'b'];
       var code = [
         'require("x")',
         'require("y")',
-        'require("z")',
+        'require( "z" )',
+        'require( "a")',
+        'require("b" )',
       ].join('\n');
 
       depGraph.resolveDependency.mockImpl(function(fromModule, toModuleName) {
@@ -255,7 +258,9 @@ describe('HasteDependencyResolver', function() {
         ' require, requireDynamic, requireLazy, module, exports) {' +
         '  require(\'changed\')',
         'require(\'y\')',
-        'require("z")});',
+        'require("z")',
+        'require("a")',
+        'require("b")});',
       ].join('\n'));
     });
   });

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

@@ -9,8 +9,8 @@
 'use strict';
 
 var path = require('path');
-var FileWatcher = require('../../FileWatcher');
 var DependencyGraph = require('./DependencyGraph');
+var requirePattern = require('./requirePattern');
 var ModuleDescriptor = require('../ModuleDescriptor');
 var declareOpts = require('../../lib/declareOpts');
 
@@ -25,7 +25,6 @@ var DEFINE_MODULE_CODE = [
 ].join('');
 
 var DEFINE_MODULE_REPLACE_RE = /_moduleName_|_code_|_deps_/g;
-var REL_REQUIRE_STMT = /require\(['"]([\.\/0-9A-Z_$\-]*)['"]\)/gi;
 
 var validateOpts = declareOpts({
   projectRoots: {
@@ -146,12 +145,12 @@ HasteDependencyResolver.prototype.wrapModule = function(module, code) {
   }
 
   var relativizedCode =
-    code.replace(REL_REQUIRE_STMT, function(codeMatch, depName) {
+    code.replace(requirePattern, function(codeMatch, _, depName) {
       var depId = resolvedDeps[depName];
       if (depId != null) {
         return 'require(\'' + depId + '\')';
       } else {
-        return codeMatch;
+        return codeMatch.replace(/\s+/g, '');
       }
     });
 

react-packager/src/DependencyResolver/haste/requirePattern.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';
+
+var REQUIRE_RE = /\brequire\s*?\(\s*?([\'"])([^"\']+)\1\s*?\)/g;
+
+module.exports = REQUIRE_RE;