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#!/usr/bin/env python
# Copyright 2017 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.
"""Updates the Fuchsia SDK to the given revision. Should be used in a 'hooks_os'
entry so that it only runs when .gclient's target_os includes 'fuchsia'."""
import argparse
import logging
import os
import re
import shutil
import subprocess
import sys
import tarfile
from common import GetHostOsFromPlatform, GetHostArchFromPlatform, \
DIR_SOURCE_ROOT, SDK_ROOT
sys.path.append(os.path.join(DIR_SOURCE_ROOT, 'build'))
import find_depot_tools
SDK_SIGNATURE_FILE = '.hash'
SDK_TARBALL_PATH_TEMPLATE = (
'gs://{bucket}/development/{sdk_hash}/sdk/{platform}-amd64/gn.tar.gz')
def ReadFile(filename):
with open(os.path.join(os.path.dirname(__file__), filename), 'r') as f:
return f.read()
# TODO(crbug.com/1138433): Investigate whether we can deprecate
# use of sdk_bucket.txt.
def GetOverrideCloudStorageBucket():
"""Read bucket entry from sdk_bucket.txt"""
return ReadFile('sdk-bucket.txt').strip()
def GetSdkHash(bucket):
hashes = GetSdkHashList()
return (max(hashes, key=lambda sdk: GetSdkGeneration(bucket, sdk))
if hashes else None)
def GetSdkHashList():
"""Read filename entries from sdk-hash-files.list (one per line), substitute
{platform} in each entry if present, and read from each filename."""
platform = GetHostOsFromPlatform()
filenames = [
line.strip() for line in ReadFile('sdk-hash-files.list').replace(
'{platform}', platform).splitlines()
]
sdk_hashes = [ReadFile(filename).strip() for filename in filenames]
return sdk_hashes
def GetSdkGeneration(bucket, hash):
if not hash:
return None
sdk_path = GetSdkTarballPath(bucket, hash)
cmd = [
os.path.join(find_depot_tools.DEPOT_TOOLS_PATH, 'gsutil.py'), 'ls', '-L',
sdk_path
]
logging.debug("Running '%s'", " ".join(cmd))
sdk_details = subprocess.check_output(cmd).decode('utf-8')
m = re.search('Generation:\s*(\d*)', sdk_details)
if not m:
raise RuntimeError('Could not find SDK generation for {sdk_path}'.format(
sdk_path=sdk_path))
return int(m.group(1))
def GetSdkTarballPath(bucket, sdk_hash):
return SDK_TARBALL_PATH_TEMPLATE.format(
bucket=bucket, sdk_hash=sdk_hash, platform=GetHostOsFromPlatform())
# Updates the modification timestamps of |path| and its contents to the
# current time.
def UpdateTimestampsRecursive():
for root, dirs, files in os.walk(SDK_ROOT):
for f in files:
os.utime(os.path.join(root, f), None)
for d in dirs:
os.utime(os.path.join(root, d), None)
# Fetches a tarball from GCS and uncompresses it to |output_dir|.
def DownloadAndUnpackFromCloudStorage(url, output_dir):
# Pass the compressed stream directly to 'tarfile'; don't bother writing it
# to disk first.
cmd = [os.path.join(find_depot_tools.DEPOT_TOOLS_PATH, 'gsutil.py'),
'cp', url, '-']
logging.debug('Running "%s"', ' '.join(cmd))
task = subprocess.Popen(cmd, stderr=subprocess.PIPE, stdout=subprocess.PIPE)
try:
tarfile.open(mode='r|gz', fileobj=task.stdout).extractall(path=output_dir)
except tarfile.ReadError:
task.wait()
stderr = task.stderr.read()
raise subprocess.CalledProcessError(task.returncode, cmd,
"Failed to read a tarfile from gsutil.py.{}".format(
stderr if stderr else ""))
task.wait()
if task.returncode:
raise subprocess.CalledProcessError(task.returncode, cmd,
task.stderr.read())
def MakeCleanDirectory(directory_name):
if (os.path.exists(directory_name)):
shutil.rmtree(directory_name)
os.mkdir(directory_name)
def main():
parser = argparse.ArgumentParser()
parser.add_argument('--verbose', '-v',
action='store_true',
help='Enable debug-level logging.')
parser.add_argument(
'--default-bucket',
type=str,
default='fuchsia',
help='The Google Cloud Storage bucket in which the Fuchsia SDK is '
'stored. Entry in sdk-bucket.txt will override this flag.')
args = parser.parse_args()
logging.basicConfig(level=logging.DEBUG if args.verbose else logging.INFO)
# Quietly exit if there's no SDK support for this platform.
try:
GetHostOsFromPlatform()
except:
return 0
# Use the bucket in sdk-bucket.txt if an entry exists.
# Otherwise use the default bucket.
bucket = GetOverrideCloudStorageBucket() or args.default_bucket
sdk_hash = GetSdkHash(bucket)
if not sdk_hash:
return 1
signature_filename = os.path.join(SDK_ROOT, SDK_SIGNATURE_FILE)
current_signature = (open(signature_filename, 'r').read().strip()
if os.path.exists(signature_filename) else '')
if current_signature != sdk_hash:
logging.info('Downloading GN SDK %s...' % sdk_hash)
MakeCleanDirectory(SDK_ROOT)
DownloadAndUnpackFromCloudStorage(GetSdkTarballPath(bucket, sdk_hash),
SDK_ROOT)
with open(signature_filename, 'w') as f:
f.write(sdk_hash)
UpdateTimestampsRecursive()
return 0
if __name__ == '__main__':
sys.exit(main())
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