michael@0: #!/usr/bin/env python
michael@0: # Copyright (c) 2012 The Chromium Authors. All rights reserved.
michael@0: # Use of this source code is governed by a BSD-style license that can be
michael@0: # found in the LICENSE file.
michael@0: 
michael@0: """Shim to run nacl toolchain download script only if there is a nacl dir."""
michael@0: 
michael@0: import os
michael@0: import sys
michael@0: 
michael@0: 
michael@0: def Main(args):
michael@0:   # Exit early if disable_nacl=1.
michael@0:   if 'disable_nacl=1' in os.environ.get('GYP_DEFINES', ''):
michael@0:     return 0
michael@0:   script_dir = os.path.dirname(os.path.abspath(__file__))
michael@0:   src_dir = os.path.dirname(script_dir)
michael@0:   nacl_dir = os.path.join(src_dir, 'native_client')
michael@0:   nacl_build_dir = os.path.join(nacl_dir, 'build')
michael@0:   download_script = os.path.join(nacl_build_dir, 'download_toolchains.py')
michael@0:   if not os.path.exists(download_script):
michael@0:     print "Can't find '%s'" % download_script
michael@0:     print 'Presumably you are intentionally building without NativeClient.'
michael@0:     print 'Skipping NativeClient toolchain download.'
michael@0:     sys.exit(0)
michael@0:   sys.path.insert(0, nacl_build_dir)
michael@0:   import download_toolchains
michael@0: 
michael@0:   # TODO (robertm): Finish getting PNaCl ready for prime time.
michael@0:   # BUG:
michael@0:   # We remove this --optional-pnacl argument, and instead replace it with
michael@0:   # --no-pnacl for most cases.  However, if the bot name is the pnacl_sdk
michael@0:   # bot then we will go ahead and download it.  This prevents increasing the
michael@0:   # gclient sync time for developers, or standard Chrome bots.
michael@0:   if '--optional-pnacl' in args:
michael@0:     args.remove('--optional-pnacl')
michael@0:     # By default we don't use PNaCl toolchain yet, unless on ARM, where
michael@0:     # there is no other toolchain to build untrusted code at the moment.
michael@0:     # So analyze if we're building for ARM, or on SDK buildbot.
michael@0:     # TODO(olonho): we need to invent more reliable way to get build
michael@0:     # configuration info, to know if we're building for ARM.
michael@0:     use_pnacl = False
michael@0:     if 'target_arch=arm' in os.environ.get('GYP_DEFINES', ''):
michael@0:       use_pnacl = True
michael@0:     buildbot_name = os.environ.get('BUILDBOT_BUILDERNAME', '')
michael@0:     if buildbot_name.find('pnacl') >= 0 and  buildbot_name.find('sdk') >= 0:
michael@0:       use_pnacl = True
michael@0:     if use_pnacl:
michael@0:       print '\n*** DOWNLOADING PNACL TOOLCHAIN ***\n'
michael@0:     else:
michael@0:       args.append('--no-pnacl')
michael@0: 
michael@0:   # Append the name of the file to use as a version and hash source.
michael@0:   # NOTE:  While not recommended, it is possible to redirect this file to
michael@0:   # a chrome location to avoid branching NaCl if just a toolchain needs
michael@0:   # to be bumped.
michael@0:   args.append(os.path.join(nacl_dir,'TOOL_REVISIONS'))
michael@0: 
michael@0:   download_toolchains.main(args)
michael@0:   return 0
michael@0: 
michael@0: 
michael@0: if __name__ == '__main__':
michael@0:   sys.exit(Main(sys.argv[1:]))