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denoland-rusty-v8/tools/gn_ninja_binaries.py

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#!/usr/bin/env python
# Copyright (c) 2012 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.
"""This script is used to download prebuilt gn/ninja binaries."""
# TODO: Running stand-alone won't work on Windows due to the dia dll copying.
from __future__ import division
from __future__ import print_function
import argparse
import os
import shutil
import stat
import sys
import tarfile
import tempfile
import time
try:
from urllib2 import HTTPError, URLError, urlopen
except ImportError: # For Py3 compatibility
from urllib.error import HTTPError, URLError
from urllib.request import urlopen
URL = "https://s3.amazonaws.com/deno.land/gn_ninja_binaries.tar.gz"
DIR = None
def RmTree(dir):
"""Delete dir."""
def ChmodAndRetry(func, path, _):
# Subversion can leave read-only files around.
if not os.access(path, os.W_OK):
os.chmod(path, stat.S_IWUSR)
return func(path)
raise
shutil.rmtree(dir, onerror=ChmodAndRetry)
def DownloadUrl(url, output_file):
"""Download url into output_file."""
CHUNK_SIZE = 4096
TOTAL_DOTS = 10
num_retries = 3
retry_wait_s = 5 # Doubled at each retry.
while True:
try:
sys.stdout.write('Downloading %s ' % url)
sys.stdout.flush()
response = urlopen(url)
total_size = int(response.info().get('Content-Length').strip())
bytes_done = 0
dots_printed = 0
while True:
chunk = response.read(CHUNK_SIZE)
if not chunk:
break
output_file.write(chunk)
bytes_done += len(chunk)
num_dots = TOTAL_DOTS * bytes_done // total_size
sys.stdout.write('.' * (num_dots - dots_printed))
sys.stdout.flush()
dots_printed = num_dots
if bytes_done != total_size:
raise URLError(
"only got %d of %d bytes" % (bytes_done, total_size))
print(' Done.')
return
except URLError as e:
sys.stdout.write('\n')
print(e)
if num_retries == 0 or isinstance(e, HTTPError) and e.code == 404:
raise e
num_retries -= 1
print('Retrying in %d s ...' % retry_wait_s)
sys.stdout.flush()
time.sleep(retry_wait_s)
retry_wait_s *= 2
def EnsureDirExists(path):
if not os.path.exists(path):
os.makedirs(path)
def DownloadAndUnpack(url, output_dir, path_prefixes=None):
"""Download an archive from url and extract into output_dir. If path_prefixes
is not None, only extract files whose paths within the archive start with
any prefix in path_prefixes."""
with tempfile.TemporaryFile() as f:
DownloadUrl(url, f)
f.seek(0)
EnsureDirExists(output_dir)
t = tarfile.open(mode='r:gz', fileobj=f)
members = None
if path_prefixes is not None:
members = [
m for m in t.getmembers() if any(
m.name.startswith(p) for p in path_prefixes)
]
t.extractall(path=output_dir, members=members)
def Update():
if os.path.exists(DIR):
RmTree(DIR)
try:
DownloadAndUnpack(URL, DIR, None)
except URLError:
print('Failed to download prebuilt ninja/gn binaries %s' % URL)
print('Exiting.')
sys.exit(1)
return 0
def main():
parser = argparse.ArgumentParser(description='Download ninja/gn binaries.')
parser.add_argument('--dir', help='Where to extract the package.')
args = parser.parse_args()
if args.dir:
global DIR
DIR = os.path.abspath(args.dir)
return Update()
if __name__ == '__main__':
sys.exit(main())