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       'CC_wrapper',
  28       'CC.host_wrapper',
  29       'CHROMIUM_GYP_FILE',
  30       'CHROMIUM_GYP_SYNTAX_CHECK',
  31       'CXX',
  32       'CXX_wrapper',
  33       'CXX.host_wrapper',
  34       'GYP_DEFINES',
  35       'GYP_GENERATOR_FLAGS',
  36       'GYP_CROSSCOMPILE',
  37       'GYP_GENERATOR_OUTPUT',
  38       'GYP_GENERATORS',
  39       'GYP_INCLUDE_FIRST',
  40       'GYP_INCLUDE_LAST',
  41       'GYP_MSVS_VERSION',
  42   )
  43   for var in supported_vars:
  44     file_val = file_data.get(var)
  45     if file_val:
  46       if var in os.environ:
  47         behavior = 'replaces'
  48         if var == 'GYP_DEFINES':
  49           result = file_val + ' ' + os.environ[var]
  50           behavior = 'merges with, and individual components override,'
  51         else:
  52           result = os.environ[var]
  53         print 'INFO: Environment value for "%s" %s value in %s' % (
  54             var, behavior, os.path.abspath(file_path)
  55         )
  56         string_padding = max(len(var), len(file_path), len('result'))
  57         print '      %s: %s' % (var.rjust(string_padding), os.environ[var])
  58         print '      %s: %s' % (file_path.rjust(string_padding), file_val)
  59         os.environ[var] = result
  60       else:
  61         os.environ[var] = file_val
  62
  63
  64 def apply_chromium_gyp_env():
  65   if 'SKIP_CHROMIUM_GYP_ENV' not in os.environ:
  66     # Update the environment based on chromium.gyp_env
  67     path = os.path.join(os.path.dirname(CHROME_SRC), 'chromium.gyp_env')
  68     apply_gyp_environment_from_file(path)