build/download_nacl_toolchains.py

   1 #!/usr/bin/env python
   2 # Copyright (c) 2012 The Chromium Authors. All rights reserved.
   3 # Use of this source code is governed by a BSD-style license that can be
   4 # found in the LICENSE file.
   5
   6 """Shim to run nacl toolchain download script only if there is a nacl dir."""
   7
   8 import os
   9 import sys
  10
  11
  12 def Main(args):
  13   # Exit early if disable_nacl=1.
  14   if 'disable_nacl=1' in os.environ.get('GYP_DEFINES', ''):
  15     return 0
  16   script_dir = os.path.dirname(os.path.abspath(__file__))
  17   src_dir = os.path.dirname(script_dir)
  18   nacl_dir = os.path.join(src_dir, 'native_client')
  19   nacl_build_dir = os.path.join(nacl_dir, 'build')
  20   download_script = os.path.join(nacl_build_dir, 'download_toolchains.py')
  21   if not os.path.exists(download_script):
  22     print "Can't find '%s'" % download_script
  23     print 'Presumably you are intentionally building without NativeClient.'
  24     print 'Skipping NativeClient toolchain download.'
  25     sys.exit(0)
  26   sys.path.insert(0, nacl_build_dir)
  27   import download_toolchains
  28
  29   # TODO (robertm): Finish getting PNaCl ready for prime time.
  30   # BUG:
  31   # We remove this --optional-pnacl argument, and instead replace it with
  32   # --no-pnacl for most cases.  However, if the bot name is the pnacl_sdk
  33   # bot then we will go ahead and download it.  This prevents increasing the
  34   # gclient sync time for developers, or standard Chrome bots.
  35   if '--optional-pnacl' in args:
  36     args.remove('--optional-pnacl')
  37     # By default we don't use PNaCl toolchain yet, unless on ARM, where
  38     # there is no other toolchain to build untrusted code at the moment.
  39     # So analyze if we're building for ARM, or on SDK buildbot.
  40     # TODO(olonho): we need to invent more reliable way to get build
  41     # configuration info, to know if we're building for ARM.
  42     use_pnacl = False
  43     if 'target_arch=arm' in os.environ.get('GYP_DEFINES', ''):
  44       use_pnacl = True
  45     buildbot_name = os.environ.get('BUILDBOT_BUILDERNAME', '')
  46     if buildbot_name.find('pnacl') >= 0 and  buildbot_name.find('sdk') >= 0:
  47       use_pnacl = True
  48     if use_pnacl:
  49       print '\n*** DOWNLOADING PNACL TOOLCHAIN ***\n'
  50     else:
  51       args.append('--no-pnacl')
  52
  53   # Append the name of the file to use as a version and hash source.
  54   # NOTE:  While not recommended, it is possible to redirect this file to
  55   # a chrome location to avoid branching NaCl if just a toolchain needs
  56   # to be bumped.
  57   args.append(os.path.join(nacl_dir,'TOOL_REVISIONS'))
  58
  59   download_toolchains.main(args)
  60   return 0
  61
  62
  63 if __name__ == '__main__':
  64   sys.exit(Main(sys.argv[1:]))