build/gyp_helper.py

   1 # Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 # Use of this source code is governed by a BSD-style license that can be
   3 # found in the LICENSE file.
   4
   5 # This file helps gyp_chromium and landmines correctly set up the gyp
   6 # environment from chromium.gyp_env on disk
   7
   8 import os
   9
  10 SCRIPT_DIR = os.path.dirname(os.path.realpath(__file__))
  11 CHROME_SRC = os.path.dirname(SCRIPT_DIR)
  12
  13
  14 def apply_gyp_environment_from_file(file_path):
  15   """Reads in a *.gyp_env file and applies the valid keys to os.environ."""
  16   if not os.path.exists(file_path):
  17     return
  18   with open(file_path, 'rU') as f:
  19     file_contents = f.read()
  20   try:
  21     file_data = eval(file_contents, {'__builtins__': None}, None)
  22   except SyntaxError, e:
  23     e.filename = os.path.abspath(file_path)
  24     raise
  25   supported_vars = (
  26       'CC',
  27       'CHROMIUM_GYP_FILE',
  28       'CHROMIUM_GYP_SYNTAX_CHECK',
  29       'CXX',
  30       'GYP_DEFINES',
  31       'GYP_GENERATOR_FLAGS',
  32       'GYP_GENERATOR_OUTPUT',
  33       'GYP_GENERATORS',
  34   )
  35   for var in supported_vars:
  36     file_val = file_data.get(var)
  37     if file_val:
  38       if var in os.environ:
  39         print 'INFO: Environment value for "%s" overrides value in %s.' % (
  40             var, os.path.abspath(file_path)
  41         )
  42       else:
  43         os.environ[var] = file_val
  44
  45
  46 def apply_chromium_gyp_env():
  47   if 'SKIP_CHROMIUM_GYP_ENV' not in os.environ:
  48     # Update the environment based on chromium.gyp_env
  49     path = os.path.join(os.path.dirname(CHROME_SRC), 'chromium.gyp_env')
  50     apply_gyp_environment_from_file(path)