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.

 """Shim to run nacl toolchain download script only if there is a nacl dir."""

 import os

 import sys

 def Main(args):

   # Exit early if disable_nacl=1.

   if 'disable_nacl=1' in os.environ.get('GYP_DEFINES', ''):

     return 0

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

   src_dir = os.path.dirname(script_dir)

   nacl_dir = os.path.join(src_dir, 'native_client')

   nacl_build_dir = os.path.join(nacl_dir, 'build')

   download_script = os.path.join(nacl_build_dir, 'download_toolchains.py')

   if not os.path.exists(download_script):

     print "Can't find '%s'" % download_script

     print 'Presumably you are intentionally building without NativeClient.'

     print 'Skipping NativeClient toolchain download.'

     sys.exit(0)

   sys.path.insert(0, nacl_build_dir)

   import download_toolchains

   # TODO (robertm): Finish getting PNaCl ready for prime time.

   # BUG:

   # We remove this --optional-pnacl argument, and instead replace it with

   # --no-pnacl for most cases.  However, if the bot name is the pnacl_sdk

   # bot then we will go ahead and download it.  This prevents increasing the

   # gclient sync time for developers, or standard Chrome bots.

   if '--optional-pnacl' in args:

     args.remove('--optional-pnacl')

     # By default we don't use PNaCl toolchain yet, unless on ARM, where

     # there is no other toolchain to build untrusted code at the moment.

     # So analyze if we're building for ARM, or on SDK buildbot.

     # TODO(olonho): we need to invent more reliable way to get build

     # configuration info, to know if we're building for ARM.

     use_pnacl = False

     if 'target_arch=arm' in os.environ.get('GYP_DEFINES', ''):

       use_pnacl = True

     buildbot_name = os.environ.get('BUILDBOT_BUILDERNAME', '')

     if buildbot_name.find('pnacl') >= 0 and  buildbot_name.find('sdk') >= 0:

       use_pnacl = True

     if use_pnacl:

       print '\n*** DOWNLOADING PNACL TOOLCHAIN ***\n'

     else:

       args.append('--no-pnacl')

   # Append the name of the file to use as a version and hash source.

   # NOTE:  While not recommended, it is possible to redirect this file to

   # a chrome location to avoid branching NaCl if just a toolchain needs

   # to be bumped.

   args.append(os.path.join(nacl_dir,'TOOL_REVISIONS'))

   download_toolchains.main(args)

   return 0

 if __name__ == '__main__':

   sys.exit(Main(sys.argv[1:]))