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bf79c6618e
git-repo/repo
David James bf79c6618e Fix os.mkdir race condition. 
This code checks whether a dir exists before creating it. In between the
check and the mkdir call, it is possible that another process will have
created the directory. We have seen this bug occur many times in
practice during our 'repo init' tests.

Change-Id: Ia47d39955739aa38fd303f4e90be7b4c50d9d4ba
2013-12-26 14:59:00 -08:00

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23 KiB
Python
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#!/usr/bin/env python
## repo default configuration
##
REPO_URL = 'https://gerrit.googlesource.com/git-repo'
REPO_REV = 'stable'
# Copyright (C) 2008 Google Inc.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
# increment this whenever we make important changes to this script
VERSION = (1, 20)
# increment this if the MAINTAINER_KEYS block is modified
KEYRING_VERSION = (1, 2)
MAINTAINER_KEYS = """
Repo Maintainer <repo@android.kernel.org>
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=CMiZ
-----END PGP PUBLIC KEY BLOCK-----
Conley Owens <cco3@android.com>
-----BEGIN PGP PUBLIC KEY BLOCK-----
Version: GnuPG v1.4.11 (GNU/Linux)
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-----END PGP PUBLIC KEY BLOCK-----
"""
GIT = 'git' # our git command
MIN_GIT_VERSION = (1, 7, 2) # minimum supported git version
repodir = '.repo' # name of repo's private directory
S_repo = 'repo' # special repo repository
S_manifests = 'manifests' # special manifest repository
REPO_MAIN = S_repo + '/main.py' # main script
MIN_PYTHON_VERSION = (2, 6) # minimum supported python version
import errno
import optparse
import os
import re
import stat
import subprocess
import sys
if sys.version_info[0] == 3:
import urllib.request
import urllib.error
else:
import imp
import urllib2
urllib = imp.new_module('urllib')
urllib.request = urllib2
urllib.error = urllib2
def _print(*objects, **kwargs):
sep = kwargs.get('sep', ' ')
end = kwargs.get('end', '\n')
out = kwargs.get('file', sys.stdout)
out.write(sep.join(objects) + end)
# Python version check
ver = sys.version_info
if ver[0] == 3:
_print('warning: Python 3 support is currently experimental. YMMV.\n'
'Please use Python 2.6 - 2.7 instead.',
file=sys.stderr)
if (ver[0], ver[1]) < MIN_PYTHON_VERSION:
_print('error: Python version %s unsupported.\n'
'Please use Python 2.6 - 2.7 instead.'
% sys.version.split(' ')[0], file=sys.stderr)
sys.exit(1)
home_dot_repo = os.path.expanduser('~/.repoconfig')
gpg_dir = os.path.join(home_dot_repo, 'gnupg')
extra_args = []
init_optparse = optparse.OptionParser(usage="repo init -u url [options]")
# Logging
group = init_optparse.add_option_group('Logging options')
group.add_option('-q', '--quiet',
dest="quiet", action="store_true", default=False,
help="be quiet")
# Manifest
group = init_optparse.add_option_group('Manifest options')
group.add_option('-u', '--manifest-url',
dest='manifest_url',
help='manifest repository location', metavar='URL')
group.add_option('-b', '--manifest-branch',
dest='manifest_branch',
help='manifest branch or revision', metavar='REVISION')
group.add_option('-m', '--manifest-name',
dest='manifest_name',
help='initial manifest file', metavar='NAME.xml')
group.add_option('--mirror',
dest='mirror', action='store_true',
help='create a replica of the remote repositories '
'rather than a client working directory')
group.add_option('--reference',
dest='reference',
help='location of mirror directory', metavar='DIR')
group.add_option('--depth', type='int', default=None,
dest='depth',
help='create a shallow clone with given depth; see git clone')
group.add_option('--archive',
dest='archive', action='store_true',
help='checkout an archive instead of a git repository for '
'each project. See git archive.')
group.add_option('-g', '--groups',
dest='groups', default='default',
help='restrict manifest projects to ones with specified '
'group(s) [default|all|G1,G2,G3|G4,-G5,-G6]',
metavar='GROUP')
group.add_option('-p', '--platform',
dest='platform', default="auto",
help='restrict manifest projects to ones with a specified '
'platform group [auto|all|none|linux|darwin|...]',
metavar='PLATFORM')
# Tool
group = init_optparse.add_option_group('repo Version options')
group.add_option('--repo-url',
dest='repo_url',
help='repo repository location', metavar='URL')
group.add_option('--repo-branch',
dest='repo_branch',
help='repo branch or revision', metavar='REVISION')
group.add_option('--no-repo-verify',
dest='no_repo_verify', action='store_true',
help='do not verify repo source code')
# Other
group = init_optparse.add_option_group('Other options')
group.add_option('--config-name',
dest='config_name', action="store_true", default=False,
help='Always prompt for name/e-mail')
class CloneFailure(Exception):
"""Indicate the remote clone of repo itself failed.
"""
def _Init(args):
"""Installs repo by cloning it over the network.
"""
opt, args = init_optparse.parse_args(args)
if args:
init_optparse.print_usage()
sys.exit(1)
url = opt.repo_url
if not url:
url = REPO_URL
extra_args.append('--repo-url=%s' % url)
branch = opt.repo_branch
if not branch:
branch = REPO_REV
extra_args.append('--repo-branch=%s' % branch)
if branch.startswith('refs/heads/'):
branch = branch[len('refs/heads/'):]
if branch.startswith('refs/'):
_print("fatal: invalid branch name '%s'" % branch, file=sys.stderr)
raise CloneFailure()
try:
os.mkdir(repodir)
except OSError as e:
if e.errno != errno.EEXIST:
_print('fatal: cannot make %s directory: %s'
% (repodir, e.strerror), file=sys.stderr)
# Don't raise CloneFailure; that would delete the
# name. Instead exit immediately.
#
sys.exit(1)
_CheckGitVersion()
try:
if NeedSetupGnuPG():
can_verify = SetupGnuPG(opt.quiet)
else:
can_verify = True
dst = os.path.abspath(os.path.join(repodir, S_repo))
_Clone(url, dst, opt.quiet)
if can_verify and not opt.no_repo_verify:
rev = _Verify(dst, branch, opt.quiet)
else:
rev = 'refs/remotes/origin/%s^0' % branch
_Checkout(dst, branch, rev, opt.quiet)
except CloneFailure:
if opt.quiet:
_print('fatal: repo init failed; run without --quiet to see why',
file=sys.stderr)
raise
def _CheckGitVersion():
cmd = [GIT, '--version']
try:
proc = subprocess.Popen(cmd, stdout=subprocess.PIPE)
except OSError as e:
_print(file=sys.stderr)
_print("fatal: '%s' is not available" % GIT, file=sys.stderr)
_print('fatal: %s' % e, file=sys.stderr)
_print(file=sys.stderr)
_print('Please make sure %s is installed and in your path.' % GIT,
file=sys.stderr)
raise CloneFailure()
ver_str = proc.stdout.read().strip()
proc.stdout.close()
proc.wait()
if not ver_str.startswith('git version '):
_print('error: "%s" unsupported' % ver_str, file=sys.stderr)
raise CloneFailure()
ver_str = ver_str[len('git version '):].strip()
ver_act = tuple(map(int, ver_str.split('.')[0:3]))
if ver_act < MIN_GIT_VERSION:
need = '.'.join(map(str, MIN_GIT_VERSION))
_print('fatal: git %s or later required' % need, file=sys.stderr)
raise CloneFailure()
def NeedSetupGnuPG():
if not os.path.isdir(home_dot_repo):
return True
kv = os.path.join(home_dot_repo, 'keyring-version')
if not os.path.exists(kv):
return True
kv = open(kv).read()
if not kv:
return True
kv = tuple(map(int, kv.split('.')))
if kv < KEYRING_VERSION:
return True
return False
def SetupGnuPG(quiet):
try:
os.mkdir(home_dot_repo)
except OSError as e:
if e.errno != errno.EEXIST:
_print('fatal: cannot make %s directory: %s'
% (home_dot_repo, e.strerror), file=sys.stderr)
sys.exit(1)
try:
os.mkdir(gpg_dir, stat.S_IRWXU)
except OSError as e:
if e.errno != errno.EEXIST:
_print('fatal: cannot make %s directory: %s' % (gpg_dir, e.strerror),
file=sys.stderr)
sys.exit(1)
env = os.environ.copy()
env['GNUPGHOME'] = gpg_dir.encode()
cmd = ['gpg', '--import']
try:
proc = subprocess.Popen(cmd,
env = env,
stdin = subprocess.PIPE)
except OSError as e:
if not quiet:
_print('warning: gpg (GnuPG) is not available.', file=sys.stderr)
_print('warning: Installing it is strongly encouraged.', file=sys.stderr)
_print(file=sys.stderr)
return False
proc.stdin.write(MAINTAINER_KEYS)
proc.stdin.close()
if proc.wait() != 0:
_print('fatal: registering repo maintainer keys failed', file=sys.stderr)
sys.exit(1)
_print()
fd = open(os.path.join(home_dot_repo, 'keyring-version'), 'w')
fd.write('.'.join(map(str, KEYRING_VERSION)) + '\n')
fd.close()
return True
def _SetConfig(local, name, value):
"""Set a git configuration option to the specified value.
"""
cmd = [GIT, 'config', name, value]
if subprocess.Popen(cmd, cwd = local).wait() != 0:
raise CloneFailure()
def _InitHttp():
handlers = []
mgr = urllib.request.HTTPPasswordMgrWithDefaultRealm()
try:
import netrc
n = netrc.netrc()
for host in n.hosts:
p = n.hosts[host]
mgr.add_password(p[1], 'http://%s/' % host, p[0], p[2])
mgr.add_password(p[1], 'https://%s/' % host, p[0], p[2])
except:
pass
handlers.append(urllib.request.HTTPBasicAuthHandler(mgr))
handlers.append(urllib.request.HTTPDigestAuthHandler(mgr))
if 'http_proxy' in os.environ:
url = os.environ['http_proxy']
handlers.append(urllib.request.ProxyHandler({'http': url, 'https': url}))
if 'REPO_CURL_VERBOSE' in os.environ:
handlers.append(urllib.request.HTTPHandler(debuglevel=1))
handlers.append(urllib.request.HTTPSHandler(debuglevel=1))
urllib.request.install_opener(urllib.request.build_opener(*handlers))
def _Fetch(url, local, src, quiet):
if not quiet:
_print('Get %s' % url, file=sys.stderr)
cmd = [GIT, 'fetch']
if quiet:
cmd.append('--quiet')
err = subprocess.PIPE
else:
err = None
cmd.append(src)
cmd.append('+refs/heads/*:refs/remotes/origin/*')
cmd.append('refs/tags/*:refs/tags/*')
proc = subprocess.Popen(cmd, cwd = local, stderr = err)
if err:
proc.stderr.read()
proc.stderr.close()
if proc.wait() != 0:
raise CloneFailure()
def _DownloadBundle(url, local, quiet):
if not url.endswith('/'):
url += '/'
url += 'clone.bundle'
proc = subprocess.Popen(
[GIT, 'config', '--get-regexp', 'url.*.insteadof'],
cwd = local,
stdout = subprocess.PIPE)
for line in proc.stdout:
m = re.compile(r'^url\.(.*)\.insteadof (.*)$').match(line)
if m:
new_url = m.group(1)
old_url = m.group(2)
if url.startswith(old_url):
url = new_url + url[len(old_url):]
break
proc.stdout.close()
proc.wait()
if not url.startswith('http:') and not url.startswith('https:'):
return False
dest = open(os.path.join(local, '.git', 'clone.bundle'), 'w+b')
try:
try:
r = urllib.request.urlopen(url)
except urllib.error.HTTPError as e:
if e.code in [403, 404]:
return False
_print('fatal: Cannot get %s' % url, file=sys.stderr)
_print('fatal: HTTP error %s' % e.code, file=sys.stderr)
raise CloneFailure()
except urllib.error.URLError as e:
_print('fatal: Cannot get %s' % url, file=sys.stderr)
_print('fatal: error %s' % e.reason, file=sys.stderr)
raise CloneFailure()
try:
if not quiet:
_print('Get %s' % url, file=sys.stderr)
while True:
buf = r.read(8192)
if buf == '':
return True
dest.write(buf)
finally:
r.close()
finally:
dest.close()
def _ImportBundle(local):
path = os.path.join(local, '.git', 'clone.bundle')
try:
_Fetch(local, local, path, True)
finally:
os.remove(path)
def _Clone(url, local, quiet):
"""Clones a git repository to a new subdirectory of repodir
"""
try:
os.mkdir(local)
except OSError as e:
_print('fatal: cannot make %s directory: %s' % (local, e.strerror),
file=sys.stderr)
raise CloneFailure()
cmd = [GIT, 'init', '--quiet']
try:
proc = subprocess.Popen(cmd, cwd = local)
except OSError as e:
_print(file=sys.stderr)
_print("fatal: '%s' is not available" % GIT, file=sys.stderr)
_print('fatal: %s' % e, file=sys.stderr)
_print(file=sys.stderr)
_print('Please make sure %s is installed and in your path.' % GIT,
file=sys.stderr)
raise CloneFailure()
if proc.wait() != 0:
_print('fatal: could not create %s' % local, file=sys.stderr)
raise CloneFailure()
_InitHttp()
_SetConfig(local, 'remote.origin.url', url)
_SetConfig(local, 'remote.origin.fetch',
'+refs/heads/*:refs/remotes/origin/*')
if _DownloadBundle(url, local, quiet):
_ImportBundle(local)
else:
_Fetch(url, local, 'origin', quiet)
def _Verify(cwd, branch, quiet):
"""Verify the branch has been signed by a tag.
"""
cmd = [GIT, 'describe', 'origin/%s' % branch]
proc = subprocess.Popen(cmd,
stdout=subprocess.PIPE,
stderr=subprocess.PIPE,
cwd = cwd)
cur = proc.stdout.read().strip()
proc.stdout.close()
proc.stderr.read()
proc.stderr.close()
if proc.wait() != 0 or not cur:
_print(file=sys.stderr)
_print("fatal: branch '%s' has not been signed" % branch, file=sys.stderr)
raise CloneFailure()
m = re.compile(r'^(.*)-[0-9]{1,}-g[0-9a-f]{1,}$').match(cur)
if m:
cur = m.group(1)
if not quiet:
_print(file=sys.stderr)
_print("info: Ignoring branch '%s'; using tagged release '%s'"
% (branch, cur), file=sys.stderr)
_print(file=sys.stderr)
env = os.environ.copy()
env['GNUPGHOME'] = gpg_dir.encode()
cmd = [GIT, 'tag', '-v', cur]
proc = subprocess.Popen(cmd,
stdout = subprocess.PIPE,
stderr = subprocess.PIPE,
cwd = cwd,
env = env)
out = proc.stdout.read()
proc.stdout.close()
err = proc.stderr.read()
proc.stderr.close()
if proc.wait() != 0:
_print(file=sys.stderr)
_print(out, file=sys.stderr)
_print(err, file=sys.stderr)
_print(file=sys.stderr)
raise CloneFailure()
return '%s^0' % cur
def _Checkout(cwd, branch, rev, quiet):
"""Checkout an upstream branch into the repository and track it.
"""
cmd = [GIT, 'update-ref', 'refs/heads/default', rev]
if subprocess.Popen(cmd, cwd = cwd).wait() != 0:
raise CloneFailure()
_SetConfig(cwd, 'branch.default.remote', 'origin')
_SetConfig(cwd, 'branch.default.merge', 'refs/heads/%s' % branch)
cmd = [GIT, 'symbolic-ref', 'HEAD', 'refs/heads/default']
if subprocess.Popen(cmd, cwd = cwd).wait() != 0:
raise CloneFailure()
cmd = [GIT, 'read-tree', '--reset', '-u']
if not quiet:
cmd.append('-v')
cmd.append('HEAD')
if subprocess.Popen(cmd, cwd = cwd).wait() != 0:
raise CloneFailure()
def _FindRepo():
"""Look for a repo installation, starting at the current directory.
"""
curdir = os.getcwd()
repo = None
olddir = None
while curdir != '/' \
and curdir != olddir \
and not repo:
repo = os.path.join(curdir, repodir, REPO_MAIN)
if not os.path.isfile(repo):
repo = None
olddir = curdir
curdir = os.path.dirname(curdir)
return (repo, os.path.join(curdir, repodir))
class _Options:
help = False
def _ParseArguments(args):
cmd = None
opt = _Options()
arg = []
for i in range(len(args)):
a = args[i]
if a == '-h' or a == '--help':
opt.help = True
elif not a.startswith('-'):
cmd = a
arg = args[i + 1:]
break
return cmd, opt, arg
def _Usage():
_print(
"""usage: repo COMMAND [ARGS]
repo is not yet installed. Use "repo init" to install it here.
The most commonly used repo commands are:
init Install repo in the current working directory
help Display detailed help on a command
For access to the full online help, install repo ("repo init").
""", file=sys.stderr)
sys.exit(1)
def _Help(args):
if args:
if args[0] == 'init':
init_optparse.print_help()
sys.exit(0)
else:
_print("error: '%s' is not a bootstrap command.\n"
' For access to online help, install repo ("repo init").'
% args[0], file=sys.stderr)
else:
_Usage()
sys.exit(1)
def _NotInstalled():
_print('error: repo is not installed. Use "repo init" to install it here.',
file=sys.stderr)
sys.exit(1)
def _NoCommands(cmd):
_print("""error: command '%s' requires repo to be installed first.
Use "repo init" to install it here.""" % cmd, file=sys.stderr)
sys.exit(1)
def _RunSelf(wrapper_path):
my_dir = os.path.dirname(wrapper_path)
my_main = os.path.join(my_dir, 'main.py')
my_git = os.path.join(my_dir, '.git')
if os.path.isfile(my_main) and os.path.isdir(my_git):
for name in ['git_config.py',
'project.py',
'subcmds']:
if not os.path.exists(os.path.join(my_dir, name)):
return None, None
return my_main, my_git
return None, None
def _SetDefaultsTo(gitdir):
global REPO_URL
global REPO_REV
REPO_URL = gitdir
proc = subprocess.Popen([GIT,
'--git-dir=%s' % gitdir,
'symbolic-ref',
'HEAD'],
stdout = subprocess.PIPE,
stderr = subprocess.PIPE)
REPO_REV = proc.stdout.read().strip()
proc.stdout.close()
proc.stderr.read()
proc.stderr.close()
if proc.wait() != 0:
_print('fatal: %s has no current branch' % gitdir, file=sys.stderr)
sys.exit(1)
def main(orig_args):
repo_main, rel_repo_dir = _FindRepo()
cmd, opt, args = _ParseArguments(orig_args)
wrapper_path = os.path.abspath(__file__)
my_main, my_git = _RunSelf(wrapper_path)
if not repo_main:
if opt.help:
_Usage()
if cmd == 'help':
_Help(args)
if not cmd:
_NotInstalled()
if cmd == 'init':
if my_git:
_SetDefaultsTo(my_git)
try:
_Init(args)
except CloneFailure:
for root, dirs, files in os.walk(repodir, topdown=False):
for name in files:
os.remove(os.path.join(root, name))
for name in dirs:
os.rmdir(os.path.join(root, name))
os.rmdir(repodir)
sys.exit(1)
repo_main, rel_repo_dir = _FindRepo()
else:
_NoCommands(cmd)
if my_main:
repo_main = my_main
ver_str = '.'.join(map(str, VERSION))
me = [sys.executable, repo_main,
'--repo-dir=%s' % rel_repo_dir,
'--wrapper-version=%s' % ver_str,
'--wrapper-path=%s' % wrapper_path,
'--']
me.extend(orig_args)
me.extend(extra_args)
try:
os.execv(sys.executable, me)
except OSError as e:
_print("fatal: unable to start %s" % repo_main, file=sys.stderr)
_print("fatal: %s" % e, file=sys.stderr)
sys.exit(148)
if __name__ == '__main__':
main(sys.argv[1:])
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