build/linux/install-arm-sysroot.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 """Script to install ARM root image for cross building of ARM chrome on linux.
   7 This script can be run manually but is more often run as part of gclient
   8 hooks. When run from hooks this script should be a no-op on non-linux
   9 platforms.
  10
  11 The sysroot image could be constructed from scratch based on the current
  12 state or precise/arm but for consistency we currently use a pre-built root
  13 image which was originally designed for building trusted NaCl code. The image
  14 will normally need to be rebuilt every time chrome's build dependancies are
  15 changed.
  16
  17 Steps to rebuild the arm sysroot image:
  18
  19 - cd $SRC/native_client
  20 - ./tools/trusted_cross_toolchains/trusted-toolchain-creator.armel.precise.sh \
  21     UpdatePackageLists
  22 - ./tools/trusted_cross_toolchains/trusted-toolchain-creator.armel.precise.sh \
  23     BuildJail $SRC/out/arm-sysroot.tar.gz
  24 - gsutil cp -a public-read $SRC/out/arm-sysroot.tar.gz \
  25     nativeclient-archive2/toolchain/$NACL_REV/sysroot-arm-trusted.tgz
  26 """
  27
  28 import os
  29 import shutil
  30 import subprocess
  31 import sys
  32
  33
  34 SCRIPT_DIR = os.path.dirname(os.path.abspath(__file__))
  35 URL_PREFIX = 'https://storage.googleapis.com'
  36 URL_PATH = 'nativeclient-archive2/toolchain'
  37 REVISION = 13035
  38 TARBALL = 'sysroot-arm-trusted.tgz'
  39
  40 def main(args):
  41   if '--linux-only' in args:
  42     # This argument is passed when run from the gclient hooks.
  43     # In this case we return early on non-linux platforms
  44     # or if GYP_DEFINES doesn't include target_arch=arm
  45     if not sys.platform.startswith('linux'):
  46       return 0
  47
  48     if "target_arch=arm" not in os.environ.get('GYP_DEFINES', ''):
  49       return 0
  50
  51   src_root = os.path.dirname(os.path.dirname(SCRIPT_DIR))
  52   sysroot = os.path.join(src_root, 'arm-sysroot')
  53   url = "%s/%s/%s/%s" % (URL_PREFIX, URL_PATH, REVISION, TARBALL)
  54
  55   stamp = os.path.join(sysroot, ".stamp")
  56   if os.path.exists(stamp):
  57     with open(stamp) as s:
  58       if s.read() == url:
  59         print "ARM root image already up-to-date: %s" % sysroot
  60         return 0
  61
  62   print "Installing ARM root image: %s" % sysroot
  63   if os.path.isdir(sysroot):
  64     shutil.rmtree(sysroot)
  65   os.mkdir(sysroot)
  66   tarball = os.path.join(sysroot, TARBALL)
  67   curl = ['curl', '--fail', '-L', url, '-o', tarball]
  68   if os.isatty(sys.stdout.fileno()):
  69     curl.append('--progress')
  70   else:
  71     curl.append('--silent')
  72   subprocess.check_call(curl)
  73   subprocess.check_call(['tar', 'xf', tarball, '-C', sysroot])
  74   os.remove(tarball)
  75
  76   with open(stamp, 'w') as s:
  77     s.write(url)
  78   return 0
  79
  80
  81 if __name__ == '__main__':
  82   sys.exit(main(sys.argv[1:]))