1 files changed, 169 insertions, 0 deletions
diff --git a/third_party/libwebrtc/build/linux/sysroot_scripts/install-sysroot.py b/third_party/libwebrtc/build/linux/sysroot_scripts/install-sysroot.py
new file mode 100755
index 0000000000..ada6208644
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+++ b/third_party/libwebrtc/build/linux/sysroot_scripts/install-sysroot.py
@@ -0,0 +1,169 @@
+#!/usr/bin/env python3
+# Copyright (c) 2013 The Chromium Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+"""Install Debian sysroots for building chromium.
+"""
+
+# The sysroot is needed to ensure that binaries that get built will run on
+# the oldest stable version of Debian that we currently support.
+# This script can be run manually but is more often run as part of gclient
+# hooks. When run from hooks this script is a no-op on non-linux platforms.
+
+# The sysroot image could be constructed from scratch based on the current state
+# of the Debian archive but for consistency we use a pre-built root image (we
+# don't want upstream changes to Debian to effect the chromium build until we
+# choose to pull them in). The images will normally need to be rebuilt every
+# time chrome's build dependencies are changed but should also be updated
+# periodically to include upstream security fixes from Debian.
+
+# This script looks at sysroots.json next to it to find the name of a .tar.xz
+# to download and the location to extract it to. The extracted sysroot could for
+# example be in build/linux/debian_sid_amd64-sysroot/.
+
+from __future__ import print_function
+
+import hashlib
+import json
+import platform
+import optparse
+import os
+import re
+import shutil
+import subprocess
+import sys
+try:
+  # For Python 3.0 and later
+  from urllib.request import urlopen
+except ImportError:
+  # Fall back to Python 2's urllib2
+  from urllib2 import urlopen
+
+SCRIPT_DIR = os.path.dirname(os.path.abspath(__file__))
+
+URL_PREFIX = 'https://commondatastorage.googleapis.com'
+URL_PATH = 'chrome-linux-sysroot/toolchain'
+
+VALID_ARCHS = ('arm', 'arm64', 'i386', 'amd64', 'mips', 'mips64el')
+
+ARCH_TRANSLATIONS = {
+    'x64': 'amd64',
+    'x86': 'i386',
+    'mipsel': 'mips',
+    'mips64': 'mips64el',
+}
+
+DEFAULT_TARGET_PLATFORM = 'sid'
+
+class Error(Exception):
+  pass
+
+
+def GetSha1(filename):
+  sha1 = hashlib.sha1()
+  with open(filename, 'rb') as f:
+    while True:
+      # Read in 1mb chunks, so it doesn't all have to be loaded into memory.
+      chunk = f.read(1024*1024)
+      if not chunk:
+        break
+      sha1.update(chunk)
+  return sha1.hexdigest()
+
+
+def main(args):
+  parser = optparse.OptionParser('usage: %prog [OPTIONS]', description=__doc__)
+  parser.add_option('--arch',
+                    help='Sysroot architecture: %s' % ', '.join(VALID_ARCHS))
+  parser.add_option('--all', action='store_true',
+                    help='Install all sysroot images (useful when updating the'
+                         ' images)')
+  parser.add_option('--print-hash',
+                    help='Print the hash of the sysroot for the given arch.')
+  options, _ = parser.parse_args(args)
+
+  if options.print_hash:
+    arch = options.print_hash
+    print(GetSysrootDict(DEFAULT_TARGET_PLATFORM,
+                         ARCH_TRANSLATIONS.get(arch, arch))['Sha1Sum'])
+    return 0
+  if options.arch:
+    InstallSysroot(DEFAULT_TARGET_PLATFORM,
+                   ARCH_TRANSLATIONS.get(options.arch, options.arch))
+  elif options.all:
+    for arch in VALID_ARCHS:
+      InstallSysroot(DEFAULT_TARGET_PLATFORM, arch)
+  else:
+    print('You much specify one of the options.')
+    return 1
+
+  return 0
+
+
+def GetSysrootDict(target_platform, target_arch):
+  if target_arch not in VALID_ARCHS:
+    raise Error('Unknown architecture: %s' % target_arch)
+
+  sysroots_file = os.path.join(SCRIPT_DIR, 'sysroots.json')
+  sysroots = json.load(open(sysroots_file))
+  sysroot_key = '%s_%s' % (target_platform, target_arch)
+  if sysroot_key not in sysroots:
+    raise Error('No sysroot for: %s %s' % (target_platform, target_arch))
+  return sysroots[sysroot_key]
+
+
+def InstallSysroot(target_platform, target_arch):
+  sysroot_dict = GetSysrootDict(target_platform, target_arch)
+  tarball_filename = sysroot_dict['Tarball']
+  tarball_sha1sum = sysroot_dict['Sha1Sum']
+  # TODO(thestig) Consider putting this elsewhere to avoid having to recreate
+  # it on every build.
+  linux_dir = os.path.dirname(SCRIPT_DIR)
+  sysroot = os.path.join(linux_dir, sysroot_dict['SysrootDir'])
+
+  url = '%s/%s/%s/%s' % (URL_PREFIX, URL_PATH, tarball_sha1sum,
+                         tarball_filename)
+
+  stamp = os.path.join(sysroot, '.stamp')
+  if os.path.exists(stamp):
+    with open(stamp) as s:
+      if s.read() == url:
+        return
+
+  print('Installing Debian %s %s root image: %s' % \
+      (target_platform, target_arch, sysroot))
+  if os.path.isdir(sysroot):
+    shutil.rmtree(sysroot)
+  os.mkdir(sysroot)
+  tarball = os.path.join(sysroot, tarball_filename)
+  print('Downloading %s' % url)
+  sys.stdout.flush()
+  sys.stderr.flush()
+  for _ in range(3):
+    try:
+      response = urlopen(url)
+      with open(tarball, "wb") as f:
+        f.write(response.read())
+      break
+    except Exception:  # Ignore exceptions.
+      pass
+  else:
+    raise Error('Failed to download %s' % url)
+  sha1sum = GetSha1(tarball)
+  if sha1sum != tarball_sha1sum:
+    raise Error('Tarball sha1sum is wrong.'
+                'Expected %s, actual: %s' % (tarball_sha1sum, sha1sum))
+  subprocess.check_call(['tar', 'xf', tarball, '-C', sysroot])
+  os.remove(tarball)
+
+  with open(stamp, 'w') as s:
+    s.write(url)
+
+
+if __name__ == '__main__':
+  try:
+    sys.exit(main(sys.argv[1:]))
+  except Error as e:
+    sys.stderr.write(str(e) + '\n')
+    sys.exit(1)