blob: 7bb3eba5a2682f4c885d5351cc06f535ca7e806b [file] [log] [blame]
#!/usr/bin/env python
# Copyright 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.
"""Downloads and unpacks a toolchain for building on Windows. The contents are
matched by sha1 which will be updated when the toolchain is updated.
Having a toolchain script in depot_tools means that it's not versioned
directly with the source code. That is, if the toolchain is upgraded, but
you're trying to build an historical version of Chromium from before the
toolchain upgrade, this will cause you to build with a newer toolchain than
was available when that code was committed. This is done for a two main
reasons: 1) it would likely be annoying to have the up-to-date toolchain
removed and replaced by one without a service pack applied); 2) it would
require maintaining scripts that can build older not-up-to-date revisions of
the toolchain. This is likely to be a poorly tested code path that probably
won't be properly maintained. See
This does not extend to major versions of the toolchain however, on the
assumption that there are more likely to be source incompatibilities between
major revisions. This script calls a subscript (currently,
to do the main work. It is expected that will always be able
to acquire/build the most current revision of a VS2013-based toolchain. In the
future when a hypothetical VS2015 is released, the 2013 script will be
maintained, and a new 2015 script would be added.
import hashlib
import json
import optparse
import os
import shutil
import subprocess
import sys
import time
BASEDIR = os.path.dirname(os.path.abspath(__file__))
DEPOT_TOOLS_PATH = os.path.join(BASEDIR, '..')
import download_from_google_storage
if sys.platform != 'cygwin':
import ctypes.wintypes
GetFileAttributes = ctypes.windll.kernel32.GetFileAttributesW
GetFileAttributes.argtypes = (ctypes.wintypes.LPWSTR,)
GetFileAttributes.restype = ctypes.wintypes.DWORD
def IsHidden(file_path):
"""Returns whether the given |file_path| has the 'system' or 'hidden'
attribute set."""
p = GetFileAttributes(file_path)
assert p != 0xffffffff
def GetFileList(root):
"""Gets a normalized list of files under |root|."""
assert not os.path.isabs(root)
assert os.path.normpath(root) == root
file_list = []
for base, _, files in os.walk(root):
paths = [os.path.join(base, f) for f in files]
file_list.extend(x.lower() for x in paths if not IsHidden(x))
return sorted(file_list)
def MakeTimestampsFileName(root):
return os.path.join(root, '..', '.timestamps')
def CalculateHash(root):
"""Calculates the sha1 of the paths to all files in the given |root| and the
contents of those files, and returns as a hex string."""
file_list = GetFileList(root)
# Check whether we previously saved timestamps in $root/../.timestamps. If
# we didn't, or they don't match, then do the full calculation, otherwise
# return the saved value.
timestamps_file = MakeTimestampsFileName(root)
timestamps_data = {'files': [], 'sha1': ''}
if os.path.exists(timestamps_file):
with open(timestamps_file, 'rb') as f:
timestamps_data = json.load(f)
except ValueError:
# json couldn't be loaded, empty data will force a re-hash.
matches = len(file_list) == len(timestamps_data['files'])
if matches:
for disk, cached in zip(file_list, timestamps_data['files']):
if disk != cached[0] or os.stat(disk).st_mtime != cached[1]:
matches = False
if matches:
return timestamps_data['sha1']
digest = hashlib.sha1()
for path in file_list:
with open(path, 'rb') as f:
return digest.hexdigest()
def SaveTimestampsAndHash(root, sha1):
"""Saves timestamps and the final hash to be able to early-out more quickly
next time."""
file_list = GetFileList(root)
timestamps_data = {
'files': [[f, os.stat(f).st_mtime] for f in file_list],
'sha1': sha1,
with open(MakeTimestampsFileName(root), 'wb') as f:
json.dump(timestamps_data, f)
def HaveSrcInternalAccess():
"""Checks whether access to src-internal is available."""
with open(os.devnull, 'w') as nul:
['svn', 'ls', '--non-interactive',
shell=True, stdin=nul, stdout=nul, stderr=nul) == 0:
return True
['git', '-c', 'core.askpass=true', 'remote', 'show',
shell=True, stdin=nul, stdout=nul, stderr=nul) == 0
def LooksLikeGoogler():
"""Checks for a USERDOMAIN environment variable of 'GOOGLE', which
probably implies the current user is a Googler."""
return os.environ.get('USERDOMAIN').upper() == 'GOOGLE'
def CanAccessToolchainBucket():
"""Checks whether the user has access to gs://chrome-wintoolchain/."""
gsutil = download_from_google_storage.Gsutil(
download_from_google_storage.GSUTIL_DEFAULT_PATH, boto_path=None)
code, _, _ = gsutil.check_call('ls', 'gs://chrome-wintoolchain/')
return code == 0
def RequestGsAuthentication():
"""Requests that the user authenticate to be able to access gs:// as a
Googler. This allows much faster downloads, and pulling (old) toolchains
that match src/ revisions.
print 'Access to gs://chrome-wintoolchain/ not configured.'
print '-----------------------------------------------------------------'
print 'You appear to be a Googler.'
print 'I\'m sorry for the hassle, but you need to do a one-time manual'
print 'authentication. Please run:'
print ' download_from_google_storage --config'
print 'and follow the instructions.'
print 'NOTE 1: Use your credentials, not'
print 'NOTE 2: Enter 0 when asked for a "project-id".'
print '-----------------------------------------------------------------'
def DelayBeforeRemoving(target_dir):
"""A grace period before deleting the out of date toolchain directory."""
if (os.path.isdir(target_dir) and
not bool(int(os.environ.get('CHROME_HEADLESS', '0')))):
for i in range(9, 0, -1):
'\rRemoving old toolchain in %ds... (Ctrl-C to cancel)' % i)
def main():
if not sys.platform.startswith(('cygwin', 'win32')):
return 0
parser = optparse.OptionParser(description=sys.modules[__name__].__doc__)
parser.add_option('--output-json', metavar='FILE',
help='write information about toolchain to FILE')
options, args = parser.parse_args()
if sys.platform == 'cygwin':
# This script requires Windows Python, so invoke with depot_tools' Python.
def winpath(path):
return subprocess.check_output(['cygpath', '-w', path]).strip()
python = os.path.join(DEPOT_TOOLS_PATH, 'python.bat')
cmd = [python, winpath(__file__)]
if options.output_json:
cmd.extend(['--output-json', winpath(options.output_json)])
# We assume that the Pro hash is the first one.
desired_hashes = args
if len(desired_hashes) == 0:
sys.exit('Desired hashes are required.')
# Move to depot_tools\win_toolchain where we'll store our files, and where
# the downloader script is.
toolchain_dir = '.'
target_dir = os.path.normpath(os.path.join(toolchain_dir, 'vs2013_files'))
# If the current hash doesn't match what we want in the file, nuke and pave.
# Typically this script is only run when the .sha1 one file is updated, but
# directly calling "gclient runhooks" will also run it, so we cache
# based on timestamps to make that case fast.
current_hash = CalculateHash(target_dir)
if current_hash not in desired_hashes:
should_use_gs = False
if (HaveSrcInternalAccess() or
LooksLikeGoogler() or
should_use_gs = True
if not CanAccessToolchainBucket():
if not should_use_gs:
print('Please follow the instructions at '
return 1
print('Windows toolchain out of date or doesn\'t exist, updating (Pro)...')
print(' current_hash: %s' % current_hash)
print(' desired_hashes: %s' % ', '.join(desired_hashes))
# This stays resident and will make the rmdir below fail.
with open(os.devnull, 'wb') as nul:['taskkill', '/f', '/im', 'mspdbsrv.exe'],
stdin=nul, stdout=nul, stderr=nul)
if os.path.isdir(target_dir):
subprocess.check_call('rmdir /s/q "%s"' % target_dir, shell=True)
args = [sys.executable,
'--targetdir', target_dir,
'--sha1', desired_hashes[0],
current_hash = CalculateHash(target_dir)
if current_hash not in desired_hashes:
print >> sys.stderr, (
'Got wrong hash after pulling a new toolchain. '
'Wanted one of \'%s\', got \'%s\'.' % (
', '.join(desired_hashes), current_hash))
return 1
SaveTimestampsAndHash(target_dir, current_hash)
if options.output_json:
shutil.copyfile(os.path.join(target_dir, '..', 'data.json'),
return 0
if __name__ == '__main__':