Fixed Gyp Xcode generator for libraries with identical names.

pylib/gyp/xcodeproj_file.py

 # Copyright (c) 2012 Google Inc. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 """Xcode project file generator.
 
 This module is both an Xcode project file generator and a documentation of the
 Xcode project file format.  Knowledge of the project file format was gained
 based on extensive experience with Xcode, and by making changes to projects in
 Xcode.app and observing the resultant changes in the associated project files.
@@ skipping 2790 matching lines @@
           continue
         remote_products.append(target._properties['productReference'])
 
       # Sort the PBXReferenceProxy children according to the list of remote
       # products.
       product_group = ref_dict['ProductGroup']
       product_group._properties['children'] = sorted(
           product_group._properties['children'],
           cmp=lambda x, y, rp=remote_products: CompareProducts(x, y, rp))
 
+  def Hashables(self):
+    # super
+    hashables = XCObject.Hashables(self)
+
+    # Projects (.xcodeproj) files with identical names defining products with
+    # identical names cause a false positive hash ID collision. We add the
+    # project file's path to the hashables to avoid this.
+    hashables.extend([self._properties['projectRoot']])
+    return hashables
+
 
 class XCProjectFile(XCObject):
   _schema = XCObject._schema.copy()
   _schema.update({
     'archiveVersion': [0, int,        0, 1, 1],
     'classes':        [0, dict,       0, 1, {}],
     'objectVersion':  [0, int,        0, 1, 45],
     'rootObject':     [0, PBXProject, 1, 1],
   })
 
@@ skipping 62 matching lines @@
       self._XCPrint(file, 0, '/* Begin ' + class_name + ' section */\n')
       for object in sorted(objects_by_class[class_name],
                            cmp=lambda x, y: cmp(x.id, y.id)):
         object.Print(file)
       self._XCPrint(file, 0, '/* End ' + class_name + ' section */\n')
 
     if self._should_print_single_line:
       self._XCPrint(file, 0, '}; ')
     else:
       self._XCPrint(file, 1, '};\n')