blob: 36040455f851513e2420c5c98ef4df3dbc3b6d20 [file] [log] [blame]
#!/usr/bin/env python
# Copyright 2021 Google Inc.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.
import hashlib
import json
import os
import platform
import re
import shutil
import stat
import sys
import tempfile
import zipfile
if sys.version_info[0] < 3:
from urllib2 import urlopen
from urllib.request import urlopen
def sha256sum(path):
with open(sk_path, 'rb') as f:
return hashlib.sha256(
except OSError:
return ''
os.chdir(os.path.join(os.path.dirname(__file__), os.pardir))
OS = {'darwin': 'mac', 'linux': 'linux', 'linux2': 'linux', 'win32': 'windows'}[sys.platform]
cpu = {'aarch64': 'arm64', 'amd64': 'amd64', 'arm64': 'arm64', 'x86_64': 'amd64'}[platform.machine().lower()]
platform = '%s-%s' % (OS, cpu)
sk = 'sk'
if 'windows' in platform:
sk = 'sk.exe'
# Find the version of 'sk' requested by DEPS.
with open('DEPS', 'rb') as f:
deps =
found = re.findall(r"'sk_tool_revision':\s*'(\S+)'", deps)
if len(found) != 1:
print('Unable to find sk_tool_revision in DEPS', file=sys.stderr)
desired_version = found[0]
# Determine which version (if any) we currently have.
sk_path = os.path.join('bin', sk)
current_sha256 = sha256sum(sk_path)
sk_version_path = os.path.join('bin', 'sk.version')
# When we download 'sk', we write the version information to a file so we can
# keep track of which version we have. Read the file to determine whether the
# current version matches what we want.
current_version = {
'version': '',
'sha256': '',
with open(sk_version_path, 'r', encoding='utf8') as f:
current_version = json.load(f)
except OSError:
if desired_version != current_version['version']:
print('Version "%s" requested by DEPS differs from current version "%s"' % (
desired_version, current_version['version']))
elif current_sha256 != current_version['sha256']:
print('sha256 sum "%s" does not match last-downloaded version "%s"' % (
current_sha256, current_version['sha256']))
print('Already up to date.')
print('Fetching %s at %s for platform %s' % (sk, desired_version, platform))
# Download sk.
skzip = os.path.join(tempfile.mkdtemp(), '')
with open(skzip, 'wb') as f:
url = '' % (
platform, desired_version)
with zipfile.ZipFile(skzip, 'r') as f:
f.extract(sk, 'bin')
if not 'windows' in platform:
uid = os.getuid()
gid = os.getgid()
os.chown(sk_path, uid, gid)
os.chmod(sk_path, stat.S_IRUSR | stat.S_IWUSR | stat.S_IXUSR |
stat.S_IRGRP | stat.S_IXGRP |
stat.S_IROTH | stat.S_IXOTH )
# Write the downloaded version info to a file.
current_version['version'] = desired_version
current_version['sha256'] = sha256sum(sk_path)
with open(sk_version_path, 'w', encoding='utf8') as f:
json.dump(current_version, f, sort_keys=True, indent=2)