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 shutil
  10 import sys
  11
  12
  13 def Main(args):
  14   # Exit early if disable_nacl=1.
  15   if 'disable_nacl=1' in os.environ.get('GYP_DEFINES', ''):
  16     return 0
  17   script_dir = os.path.dirname(os.path.abspath(__file__))
  18   src_dir = os.path.dirname(script_dir)
  19   nacl_dir = os.path.join(src_dir, 'native_client')
  20   nacl_build_dir = os.path.join(nacl_dir, 'build')
  21   package_version_dir = os.path.join(nacl_build_dir, 'package_version')
  22   package_version = os.path.join(package_version_dir, 'package_version.py')
  23   if not os.path.exists(package_version):
  24     print "Can't find '%s'" % package_version
  25     print 'Presumably you are intentionally building without NativeClient.'
  26     print 'Skipping NativeClient toolchain download.'
  27     sys.exit(0)
  28   sys.path.insert(0, package_version_dir)
  29   import package_version
  30
  31   # BUG:
  32   # We remove this --optional-pnacl argument, and instead replace it with
  33   # --no-pnacl for most cases.  However, if the bot name is an sdk
  34   # bot then we will go ahead and download it.  This prevents increasing the
  35   # gclient sync time for developers, or standard Chrome bots.
  36   if '--optional-pnacl' in args:
  37     args.remove('--optional-pnacl')
  38     use_pnacl = False
  39     buildbot_name = os.environ.get('BUILDBOT_BUILDERNAME', '')
  40     if 'pnacl' in buildbot_name and 'sdk' in buildbot_name:
  41       use_pnacl = True
  42     if use_pnacl:
  43       print '\n*** DOWNLOADING PNACL TOOLCHAIN ***\n'
  44     else:
  45       args.extend(['--exclude', 'pnacl_newlib'])
  46
  47   # Only download the ARM gcc toolchain if we are building for ARM
  48   # TODO(olonho): we need to invent more reliable way to get build
  49   # configuration info, to know if we're building for ARM.
  50   if 'target_arch=arm' not in os.environ.get('GYP_DEFINES', ''):
  51       args.extend(['--exclude', 'nacl_arm_newlib'])
  52
  53   args.append('sync')
  54   package_version.main(args)
  55
  56   # Because we are no longer extracting the toolchain, it is best to delete
  57   # the old extracted ones so that no stale toolchains are left behind. This
  58   # also would catch any stale code that happens to work because it is using
  59   # an old extracted toolchain that was left behind.
  60   toolchain_dir = os.path.join(nacl_dir, 'toolchain')
  61   for toolchain_item in os.listdir(toolchain_dir):
  62     toolchain_path = os.path.join(toolchain_dir, toolchain_item)
  63     if os.path.isdir(toolchain_path) and not toolchain_item.startswith('.'):
  64       shutil.rmtree(toolchain_path)
  65
  66   return 0
  67
  68
  69 if __name__ == '__main__':
  70   sys.exit(Main(sys.argv[1:]))