This CL adds support for extension in GYP.

pylib/gyp/generator/xcode.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.
 
 import filecmp
 import gyp.common
 import gyp.xcodeproj_file
 import gyp.xcode_ninja
 import errno
 import os
@@ skipping 18 matching lines @@
 
 # SHARED_INTERMEDIATE_DIR is the same, except that it is shared among all
 # targets that share the same BUILT_PRODUCTS_DIR.
 _shared_intermediate_var = 'SHARED_INTERMEDIATE_DIR'
 
 _library_search_paths_var = 'LIBRARY_SEARCH_PATHS'
 
 generator_default_variables = {
   'EXECUTABLE_PREFIX': '',
   'EXECUTABLE_SUFFIX': '',
+  'EXTENSION_PREFIX': '',
+  'EXTENSION_SUFFIX': '',
   'STATIC_LIB_PREFIX': 'lib',
   'SHARED_LIB_PREFIX': 'lib',
   'STATIC_LIB_SUFFIX': '.a',
   'SHARED_LIB_SUFFIX': '.dylib',
   # INTERMEDIATE_DIR is a place for targets to build up intermediate products.
   # It is specific to each build environment.  It is only guaranteed to exist
   # and be constant within the context of a project, corresponding to a single
   # input file.  Some build environments may allow their intermediate directory
   # to be shared on a wider scale, but this is not guaranteed.
   'INTERMEDIATE_DIR': '$(%s)' % _intermediate_var,
@@ skipping 596 matching lines @@
     # to create a single-file mh_bundle.
     _types = {
       'executable':             'com.apple.product-type.tool',
       'loadable_module':        'com.googlecode.gyp.xcode.bundle',
       'shared_library':         'com.apple.product-type.library.dynamic',
       'static_library':         'com.apple.product-type.library.static',
       'executable+bundle':      'com.apple.product-type.application',
       'loadable_module+bundle': 'com.apple.product-type.bundle',
       'loadable_module+xctest': 'com.apple.product-type.bundle.unit-test',
       'shared_library+bundle':  'com.apple.product-type.framework',
+      'extension+bundle':       'com.apple.product-type.app-extension',
     }
 
     target_properties = {
       'buildConfigurationList': xccl,
       'name':                   target_name,
     }
 
     type = spec['type']
     is_xctest = int(spec.get('mac_xctest_bundle', 0))
     is_bundle = int(spec.get('mac_bundle', 0)) or is_xctest
@@ skipping 562 matching lines @@
 
   for build_file in build_files:
     xcode_projects[build_file].Finalize1(xcode_targets, serialize_all_tests)
 
   for build_file in build_files:
     xcode_projects[build_file].Finalize2(xcode_targets,
                                          xcode_target_to_target_dict)
 
   for build_file in build_files:
     xcode_projects[build_file].Write()