GYP: Make GYP build deterministic

pylib/gyp/common.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.
 
 from __future__ import with_statement
 
 import collections
 import errno
 import filecmp
 import os.path
@@ skipping 93 matching lines @@
     toolset = parsed_toolset
 
   return [build_file, target, toolset]
 
 
 def BuildFile(fully_qualified_target):
   # Extracts the build file from the fully qualified target.
   return ParseQualifiedTarget(fully_qualified_target)[0]
 
 
+def OrderDeterministically(l, **kwargs):

[Nico, 2015/12/10 20:30:24]

I'd just call sorted() directly everywhere. if someone removes a sorted() and a
test in test/determinism fails, that's clear enough

[Zachary Forman, 2015/12/30 02:18:43]

Yeah, seems reasonable. I've swapped it back to sorted() :).

+  """ Sorts l so that it is ordered deterministically. """
+  return sorted(l, **kwargs)
+
+
 def GetEnvironFallback(var_list, default):
   """Look up a key in the environment, with fallback to secondary keys
   and finally falling back to a default value."""
   for var in var_list:
     if var in os.environ:
       return os.environ[var]
   return default
 
 
 def QualifiedTarget(build_file, target, toolset):
@@ skipping 475 matching lines @@
 def CrossCompileRequested():
   # TODO: figure out how to not build extra host objects in the
   # non-cross-compile case when this is enabled, and enable unconditionally.
   return (os.environ.get('GYP_CROSSCOMPILE') or
           os.environ.get('AR_host') or
           os.environ.get('CC_host') or
           os.environ.get('CXX_host') or
           os.environ.get('AR_target') or
           os.environ.get('CC_target') or
           os.environ.get('CXX_target'))