The Tor Browser / file revision

 #!/usr/bin/env python

 # Copyright (c) 2012 The Chromium Authors. All rights reserved.

 # Use of this source code is governed by a BSD-style license that can be

 # found in the LICENSE file.

 # This script is wrapper for Chromium that adds some support for how GYP

 # is invoked by Chromium beyond what can be done in the gclient hooks.

 import glob

 import os

 import shlex

 import subprocess

 import sys

 script_dir = os.path.dirname(os.path.realpath(__file__))

 chrome_src = os.path.abspath(os.path.join(script_dir, os.pardir))

 sys.path.insert(0, os.path.join(chrome_src, 'tools', 'gyp', 'pylib'))

 import gyp

 # Add paths so that pymod_do_main(...) can import files.

 sys.path.insert(1, os.path.join(chrome_src, 'tools', 'grit'))

 sys.path.insert(1, os.path.join(chrome_src, 'chrome', 'tools', 'build'))

 sys.path.insert(1, os.path.join(chrome_src, 'native_client', 'build'))

 # On Windows, Psyco shortens warm runs of build/gyp_chromium by about

 # 20 seconds on a z600 machine with 12 GB of RAM, from 90 down to 70

 # seconds.  Conversely, memory usage of build/gyp_chromium with Psyco

 # maxes out at about 158 MB vs. 132 MB without it.

 #

 # Psyco uses native libraries, so we need to load a different

 # installation depending on which OS we are running under. It has not

 # been tested whether using Psyco on our Mac and Linux builds is worth

 # it (the GYP running time is a lot shorter, so the JIT startup cost

 # may not be worth it).

 if sys.platform == 'win32':

   try:

     sys.path.insert(0, os.path.join(chrome_src, 'third_party', 'psyco_win32'))

     import psyco

   except:

     psyco = None

 else:

   psyco = None

 def apply_gyp_environment(file_path=None):

   """

   Reads in a *.gyp_env file and applies the valid keys to os.environ.

   """

   if not file_path or not os.path.exists(file_path):

     return

   file_contents = open(file_path).read()

   try:

     file_data = eval(file_contents, {'__builtins__': None}, None)

   except SyntaxError, e:

     e.filename = os.path.abspath(file_path)

     raise

   supported_vars = ( 'CC',

                      'CHROMIUM_GYP_FILE',

                      'CHROMIUM_GYP_SYNTAX_CHECK',

                      'CXX',

                      'GYP_DEFINES',

                      'GYP_GENERATOR_FLAGS',

                      'GYP_GENERATOR_OUTPUT',

                      'GYP_GENERATORS', )

   for var in supported_vars:

     val = file_data.get(var)

     if val:

       if var in os.environ:

         print 'INFO: Environment value for "%s" overrides value in %s.' % (

             var, os.path.abspath(file_path)

         )

       else:

         os.environ[var] = val

 def additional_include_files(args=[]):

   """

   Returns a list of additional (.gypi) files to include, without

   duplicating ones that are already specified on the command line.

   """

   # Determine the include files specified on the command line.

   # This doesn't cover all the different option formats you can use,

   # but it's mainly intended to avoid duplicating flags on the automatic

   # makefile regeneration which only uses this format.

   specified_includes = set()

   for arg in args:

     if arg.startswith('-I') and len(arg) > 2:

       specified_includes.add(os.path.realpath(arg[2:]))

   result = []

   def AddInclude(path):

     if os.path.realpath(path) not in specified_includes:

       result.append(path)

   # Always include common.gypi.

   AddInclude(os.path.join(script_dir, 'common.gypi'))

   # Optionally add supplemental .gypi files if present.

   supplements = glob.glob(os.path.join(chrome_src, '*', 'supplement.gypi'))

   for supplement in supplements:

     AddInclude(supplement)

   return result

 if __name__ == '__main__':

   args = sys.argv[1:]

   # Use the Psyco JIT if available.

   if psyco:

     psyco.profile()

     print "Enabled Psyco JIT."

   # Fall back on hermetic python if we happen to get run under cygwin.

   # TODO(bradnelson): take this out once this issue is fixed:

   #    http://code.google.com/p/gyp/issues/detail?id=177

   if sys.platform == 'cygwin':

     python_dir = os.path.join(chrome_src, 'third_party', 'python_26')

     env = os.environ.copy()

     env['PATH'] = python_dir + os.pathsep + env.get('PATH', '')

     p = subprocess.Popen(

        [os.path.join(python_dir, 'python.exe')] + sys.argv,

        env=env, shell=False)

     p.communicate()

     sys.exit(p.returncode)

   if 'SKIP_CHROMIUM_GYP_ENV' not in os.environ:

     # Update the environment based on chromium.gyp_env

     gyp_env_path = os.path.join(os.path.dirname(chrome_src), 'chromium.gyp_env')

     apply_gyp_environment(gyp_env_path)

   # This could give false positives since it doesn't actually do real option

   # parsing.  Oh well.

   gyp_file_specified = False

   for arg in args:

     if arg.endswith('.gyp'):

       gyp_file_specified = True

       break

   # If we didn't get a file, check an env var, and then fall back to

   # assuming 'all.gyp' from the same directory as the script.

   if not gyp_file_specified:

     gyp_file = os.environ.get('CHROMIUM_GYP_FILE')

     if gyp_file:

       # Note that CHROMIUM_GYP_FILE values can't have backslashes as

       # path separators even on Windows due to the use of shlex.split().

       args.extend(shlex.split(gyp_file))

     else:

       args.append(os.path.join(script_dir, 'all.gyp'))

   args.extend(['-I' + i for i in additional_include_files(args)])

   # There shouldn't be a circular dependency relationship between .gyp files,

   # but in Chromium's .gyp files, on non-Mac platforms, circular relationships

   # currently exist.  The check for circular dependencies is currently

   # bypassed on other platforms, but is left enabled on the Mac, where a

   # violation of the rule causes Xcode to misbehave badly.

   # TODO(mark): Find and kill remaining circular dependencies, and remove this

   # option.  http://crbug.com/35878.

   # TODO(tc): Fix circular dependencies in ChromiumOS then add linux2 to the

   # list.

   if sys.platform not in ('darwin',):

     args.append('--no-circular-check')

   # If CHROMIUM_GYP_SYNTAX_CHECK is set to 1, it will invoke gyp with --check

   # to enfore syntax checking.

   syntax_check = os.environ.get('CHROMIUM_GYP_SYNTAX_CHECK')

   if syntax_check and int(syntax_check):

     args.append('--check')

   print 'Updating projects from gyp files...'

   sys.stdout.flush()

   # Off we go...

   sys.exit(gyp.main(args))