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      1 #!/usr/bin/env python
      2 # Copyright (c) 2013 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 # Script to install a Debian Wheezy sysroot for making official Google Chrome
      7 # Linux builds.
      8 # The sysroot is needed to make Chrome work for Debian Wheezy.
      9 # This script can be run manually but is more often run as part of gclient
     10 # hooks. When run from hooks this script should be a no-op on non-linux
     11 # platforms.
     12 
     13 # The sysroot image could be constructed from scratch based on the current
     14 # state or Debian Wheezy but for consistency we currently use a pre-built root
     15 # image. The image will normally need to be rebuilt every time chrome's build
     16 # dependancies are changed.
     17 
     18 import platform
     19 import optparse
     20 import os
     21 import re
     22 import shutil
     23 import subprocess
     24 import sys
     25 
     26 
     27 SCRIPT_DIR = os.path.dirname(os.path.abspath(__file__))
     28 URL_PREFIX = 'https://commondatastorage.googleapis.com'
     29 URL_PATH = 'chrome-linux-sysroot/toolchain'
     30 REVISION = 36982
     31 TARBALL_AMD64 = 'debian_wheezy_amd64_sysroot.tgz'
     32 TARBALL_I386 = 'debian_wheezy_i386_sysroot.tgz'
     33 SYSROOT_DIR_AMD64 = 'debian_wheezy_amd64-sysroot'
     34 SYSROOT_DIR_I386 = 'debian_wheezy_i386-sysroot'
     35 
     36 
     37 def main(args):
     38   if options.arch not in ['amd64', 'i386']:
     39     print 'Unknown architecture: %s' % options.arch
     40     return 1
     41 
     42   if options.linux_only:
     43     # This argument is passed when run from the gclient hooks.
     44     # In this case we return early on non-linux platforms.
     45     if not sys.platform.startswith('linux'):
     46       return 0
     47 
     48     # Only install the sysroot for an Official Chrome Linux build.
     49     defined = ['branding=Chrome', 'buildtype=Official']
     50     undefined = ['chromeos=1']
     51     gyp_defines = os.environ.get('GYP_DEFINES', '')
     52     for option in defined:
     53       if option not in gyp_defines:
     54         return 0
     55     for option in undefined:
     56       if option in gyp_defines:
     57         return 0
     58 
     59     # Check for optional target_arch and only install for that architecture.
     60     # If target_arch is not specified, then only install for the host
     61     # architecture.
     62     host_arch = ''
     63     if 'target_arch=x64' in gyp_defines:
     64       host_arch = 'amd64'
     65     elif 'target_arch=ia32' in gyp_defines:
     66       host_arch = 'i386'
     67     else:
     68       # Figure out host arch, like the host_arch variable in build/common.gypi.
     69       machine_type = platform.machine()
     70       if machine_type in ['amd64', 'x86_64']:
     71         host_arch = 'amd64'
     72       elif re.match('(i[3-6]86|i86pc)$', machine_type):
     73         host_arch = 'i386'
     74     if host_arch != options.arch:
     75       return 0
     76 
     77   # The sysroot directory should match the one specified in build/common.gypi.
     78   # TODO(thestig) Consider putting this else where to avoid having to recreate
     79   # it on every build.
     80   linux_dir = os.path.dirname(SCRIPT_DIR)
     81   if options.arch == 'amd64':
     82     sysroot = os.path.join(linux_dir, SYSROOT_DIR_AMD64)
     83     tarball_filename = TARBALL_AMD64
     84   else:
     85     sysroot = os.path.join(linux_dir, SYSROOT_DIR_I386)
     86     tarball_filename = TARBALL_I386
     87   url = '%s/%s/%s/%s' % (URL_PREFIX, URL_PATH, REVISION, tarball_filename)
     88 
     89   stamp = os.path.join(sysroot, '.stamp')
     90   if os.path.exists(stamp):
     91     with open(stamp) as s:
     92       if s.read() == url:
     93         print 'Debian Wheezy %s root image already up-to-date: %s' % \
     94             (options.arch, sysroot)
     95         return 0
     96 
     97   print 'Installing Debian Wheezy %s root image: %s' % (options.arch, sysroot)
     98   if os.path.isdir(sysroot):
     99     shutil.rmtree(sysroot)
    100   os.mkdir(sysroot)
    101   tarball = os.path.join(sysroot, tarball_filename)
    102   subprocess.check_call(['curl', '-L', url, '-o', tarball])
    103   subprocess.check_call(['tar', 'xf', tarball, '-C', sysroot])
    104   os.remove(tarball)
    105 
    106   with open(stamp, 'w') as s:
    107     s.write(url)
    108   return 0
    109 
    110 
    111 if __name__ == '__main__':
    112   parser = optparse.OptionParser('usage: %prog [OPTIONS]')
    113   parser.add_option('', '--linux-only', dest='linux_only', action='store_true',
    114                     default=False, help='Only install sysroot for official '
    115                                         'Linux builds')
    116   parser.add_option('', '--arch', dest='arch',
    117                     help='Sysroot architecture, i386 or amd64')
    118   options, args = parser.parse_args()
    119   sys.exit(main(options))
    120