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      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 an 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     use_pnacl = False
     38     buildbot_name = os.environ.get('BUILDBOT_BUILDERNAME', '')
     39     if 'pnacl' in buildbot_name and 'sdk' in buildbot_name:
     40       use_pnacl = True
     41     if use_pnacl:
     42       print '\n*** DOWNLOADING PNACL TOOLCHAIN ***\n'
     43     else:
     44       args.append('--no-pnacl')
     45 
     46   # Only download the ARM gcc toolchain if we are building for ARM
     47   # TODO(olonho): we need to invent more reliable way to get build
     48   # configuration info, to know if we're building for ARM.
     49   if 'target_arch=arm' in os.environ.get('GYP_DEFINES', ''):
     50       args.append('--arm-untrusted')
     51 
     52   # Append the name of the file to use as a version and hash source.
     53   # NOTE:  While not recommended, it is possible to redirect this file to
     54   # a chrome location to avoid branching NaCl if just a toolchain needs
     55   # to be bumped.
     56   args.append(os.path.join(nacl_dir, 'TOOL_REVISIONS'))
     57 
     58   download_toolchains.main(args)
     59   return 0
     60 
     61 
     62 if __name__ == '__main__':
     63   sys.exit(Main(sys.argv[1:]))
     64