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219 lines
6.5 KiB
Python
219 lines
6.5 KiB
Python
# Copyright 2015 The Chromium Authors. All rights reserved.
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# Use of this source code is governed by a BSD-style license that can be
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# found in the LICENSE file.
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import argparse
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import errno
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import hashlib
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import json
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import os
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import sys
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import tempfile
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import time
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import traceback
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import urllib
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import urllib2
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# Default package repository URL.
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CIPD_BACKEND_URL = 'https://chrome-infra-packages.appspot.com'
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# ./cipd resolve \
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# infra/tools/cipd/ \
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# -version=git_revision:ac753ee37abd753a9a511210d3df362d003211f0
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CLIENT_VERSIONS = {
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'linux-386':'486264612ec0ad488b5a4ee022892450797b52ac',
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'linux-amd64':'1be98ff08b61ce4a901cece0a227f4b5cfc12e9d',
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'mac-amd64':'6de26293b09ed68cc4b8f48f61f3a6265a1aca9c',
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'windows-386':'4dad98ea0f8e7af324532ee2571c14237e2fb76b',
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'windows-amd64':'96af3f67d017a6285d491471f39d3d983a2a7011',
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}
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class CipdBootstrapError(Exception):
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"""Raised by install_cipd_client on fatal error."""
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def install_cipd_client(path, package, version):
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"""Installs CIPD client to <path>/cipd.
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Args:
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path: root directory to install CIPD client into.
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package: cipd client package name, e.g. infra/tools/cipd/linux-amd64.
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version: version of the package to install.
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Returns:
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Absolute path to CIPD executable.
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"""
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print 'Ensuring CIPD client is up-to-date'
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version_file = os.path.join(path, 'VERSION')
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bin_file = os.path.join(path, 'cipd')
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# Resolve version to concrete instance ID, e.g "live" -> "abcdef0123....".
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instance_id = call_cipd_api(
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'repo/v1/instance/resolve',
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{'package_name': package, 'version': version})['instance_id']
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print 'CIPD client %s => %s' % (version, instance_id)
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# Already installed?
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installed_instance_id = (read_file(version_file) or '').strip()
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if installed_instance_id == instance_id and os.path.exists(bin_file):
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return bin_file, instance_id
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# Resolve instance ID to an URL to fetch client binary from.
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client_info = call_cipd_api(
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'repo/v1/client',
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{'package_name': package, 'instance_id': instance_id})
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print 'CIPD client binary info:\n%s' % dump_json(client_info)
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# Fetch the client. It is ~10 MB, so don't bother and fetch it into memory.
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status, raw_client_bin = fetch_url(client_info['client_binary']['fetch_url'])
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if status != 200:
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print 'Failed to fetch client binary, HTTP %d' % status
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raise CipdBootstrapError('Failed to fetch client binary, HTTP %d' % status)
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digest = hashlib.sha1(raw_client_bin).hexdigest()
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if digest != client_info['client_binary']['sha1']:
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raise CipdBootstrapError('Client SHA1 mismatch')
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# Success.
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print 'Fetched CIPD client %s:%s at %s' % (package, instance_id, bin_file)
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write_file(bin_file, raw_client_bin)
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os.chmod(bin_file, 0755)
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write_file(version_file, instance_id + '\n')
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return bin_file, instance_id
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def call_cipd_api(endpoint, query):
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"""Sends GET request to CIPD backend, parses JSON response."""
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url = '%s/_ah/api/%s' % (CIPD_BACKEND_URL, endpoint)
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if query:
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url += '?' + urllib.urlencode(query)
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status, body = fetch_url(url)
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if status != 200:
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raise CipdBootstrapError('Server replied with HTTP %d' % status)
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try:
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body = json.loads(body)
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except ValueError:
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raise CipdBootstrapError('Server returned invalid JSON')
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status = body.get('status')
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if status != 'SUCCESS':
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m = body.get('error_message') or '<no error message>'
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raise CipdBootstrapError('Server replied with error %s: %s' % (status, m))
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return body
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def fetch_url(url, headers=None):
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"""Sends GET request (with retries).
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Args:
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url: URL to fetch.
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headers: dict with request headers.
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Returns:
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(200, reply body) on success.
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(HTTP code, None) on HTTP 401, 403, or 404 reply.
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Raises:
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Whatever urllib2 raises.
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"""
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req = urllib2.Request(url)
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req.add_header('User-Agent', 'cipd recipe bootstrap.py')
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for k, v in (headers or {}).iteritems():
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req.add_header(str(k), str(v))
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i = 0
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while True:
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i += 1
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try:
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print 'GET %s' % url
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return 200, urllib2.urlopen(req, timeout=60).read()
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except Exception as e:
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if isinstance(e, urllib2.HTTPError):
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print 'Failed to fetch %s, server returned HTTP %d' % (url, e.code)
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if e.code in (401, 403, 404):
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return e.code, None
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else:
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print 'Failed to fetch %s' % url
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if i == 20:
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raise
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print 'Retrying in %d sec.' % i
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time.sleep(i)
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def ensure_directory(path):
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"""Creates a directory."""
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# Handle a case where a file is being converted into a directory.
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chunks = path.split(os.sep)
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for i in xrange(len(chunks)):
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p = os.sep.join(chunks[:i+1])
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if os.path.exists(p) and not os.path.isdir(p):
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os.remove(p)
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break
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try:
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os.makedirs(path)
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except OSError as e:
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if e.errno != errno.EEXIST:
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raise
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def read_file(path):
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"""Returns contents of a file or None if missing."""
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try:
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with open(path, 'r') as f:
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return f.read()
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except IOError as e:
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if e.errno == errno.ENOENT:
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return None
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raise
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def write_file(path, data):
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"""Puts a file on disk, atomically."""
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ensure_directory(os.path.dirname(path))
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fd, temp_file = tempfile.mkstemp(dir=os.path.dirname(path))
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with os.fdopen(fd, 'w') as f:
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f.write(data)
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if not sys.platform in ('linux2', 'darwin'):
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# On windows we should remove destination file if it exists.
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if os.path.exists(path):
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os.remove(path)
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# At this point we may crash, and it's OK, as next time we'll just
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# re-install CIPD from scratch.
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os.rename(temp_file, path)
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def dump_json(obj):
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"""Pretty-formats object to JSON."""
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return json.dumps(obj, indent=2, sort_keys=True, separators=(',',':'))
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def main(args):
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parser = argparse.ArgumentParser('bootstrap cipd')
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parser.add_argument('--json-output', default=None)
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parser.add_argument('--version', default=None)
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parser.add_argument('--platform', required=True)
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parser.add_argument('--dest-directory', required=True)
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opts = parser.parse_args(args)
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package = "infra/tools/cipd/%s" % opts.platform
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version = opts.version or CLIENT_VERSIONS[opts.platform]
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try:
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exe_path, instance_id = install_cipd_client(opts.dest_directory,
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package, version)
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result = {
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'executable': exe_path,
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'instance_id': instance_id
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}
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if opts.json_output:
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with open(opts.json_output, 'w') as f:
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json.dump(result, f)
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except Exception as e:
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print 'Exception installing cipd: %s' % e
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_exc_type, _exc_value, exc_traceback = sys.exc_info()
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traceback.print_tb(exc_traceback)
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return 1
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return 0
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if __name__ == '__main__':
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sys.exit(main(sys.argv[1:]))
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