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27226e742d
git-repo/repo
Sebastian Schuberth 27226e742d Add a check and more output to protect against invalid REPO_URLs 
If you don't know that the url to git-repo itself can be overridden via
REPO_URL, it's hard to debug cases where REPO_URL is accidentally set to
another repository, e.g. inside a Jenkins CI job. What makes is even
harder is that the ".repo/repo" directory gets silently removed in such
cases as verifications fails, which makes it impossible to look at the
cloned files to understand the problem.

To better protect against such an issue, warn if the cloned git-repo
repository does not contain a top-level "repo" file, and state that the
".repo/repo" directory will be removed in case of a clone failure.

Change-Id: I697b4999205a5967910c0237772ccaada01e74d4
2016-10-28 14:43:02 +02:00

891 lines
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#!/usr/bin/env python
# repo default configuration
#
import os
REPO_URL = os.environ.get('REPO_URL', None)
if not REPO_URL:
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, 23)
# 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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-----END PGP PUBLIC KEY BLOCK-----
Conley Owens <cco3@android.com>
-----BEGIN PGP PUBLIC KEY BLOCK-----
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"""
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
GITC_CONFIG_FILE = '/gitc/.config'
GITC_FS_ROOT_DIR = '/gitc/manifest-rw/'
import errno
import optparse
import re
import shutil
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], 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')
group.add_option('--no-clone-bundle',
dest='no_clone_bundle', action='store_true',
help='disable use of /clone.bundle on HTTP/HTTPS')
# 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')
def _GitcInitOptions(init_optparse_arg):
init_optparse_arg.set_usage("repo gitc-init -u url -c client [options]")
g = init_optparse_arg.add_option_group('GITC options')
g.add_option('-f', '--manifest-file',
dest='manifest_file',
help='Optional manifest file to use for this GITC client.')
g.add_option('-c', '--gitc-client',
dest='gitc_client',
help='The name of the gitc_client instance to create or modify.')
_gitc_manifest_dir = None
def get_gitc_manifest_dir():
global _gitc_manifest_dir
if _gitc_manifest_dir is None:
_gitc_manifest_dir = ''
try:
with open(GITC_CONFIG_FILE, 'r') as gitc_config:
for line in gitc_config:
match = re.match('gitc_dir=(?P<gitc_manifest_dir>.*)', line)
if match:
_gitc_manifest_dir = match.group('gitc_manifest_dir')
except IOError:
pass
return _gitc_manifest_dir
def gitc_parse_clientdir(gitc_fs_path):
"""Parse a path in the GITC FS and return its client name.
@param gitc_fs_path: A subdirectory path within the GITC_FS_ROOT_DIR.
@returns: The GITC client name
"""
if gitc_fs_path == GITC_FS_ROOT_DIR:
return None
if not gitc_fs_path.startswith(GITC_FS_ROOT_DIR):
manifest_dir = get_gitc_manifest_dir()
if manifest_dir == '':
return None
if manifest_dir[-1] != '/':
manifest_dir += '/'
if gitc_fs_path == manifest_dir:
return None
if not gitc_fs_path.startswith(manifest_dir):
return None
return gitc_fs_path.split(manifest_dir)[1].split('/')[0]
return gitc_fs_path.split(GITC_FS_ROOT_DIR)[1].split('/')[0]
class CloneFailure(Exception):
"""Indicate the remote clone of repo itself failed.
"""
def _Init(args, gitc_init=False):
"""Installs repo by cloning it over the network.
"""
if gitc_init:
_GitcInitOptions(init_optparse)
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:
if gitc_init:
gitc_manifest_dir = get_gitc_manifest_dir()
if not gitc_manifest_dir:
_print('fatal: GITC filesystem is not available. Exiting...',
file=sys.stderr)
sys.exit(1)
gitc_client = opt.gitc_client
if not gitc_client:
gitc_client = gitc_parse_clientdir(os.getcwd())
if not gitc_client:
_print('fatal: GITC client (-c) is required.', file=sys.stderr)
sys.exit(1)
client_dir = os.path.join(gitc_manifest_dir, gitc_client)
if not os.path.exists(client_dir):
os.makedirs(client_dir)
os.chdir(client_dir)
if os.path.exists(repodir):
# This GITC Client has already initialized repo so continue.
return
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, not opt.no_clone_bundle)
if not os.path.isfile('%s/repo' % dst):
_print("warning: '%s' does not look like a git-repo repository, is "
"REPO_URL set correctly?" % url, file=sys.stderr)
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 ParseGitVersion(ver_str):
if not ver_str.startswith('git version '):
return None
num_ver_str = ver_str[len('git version '):].strip().split('-')[0]
to_tuple = []
for num_str in num_ver_str.split('.')[:3]:
if num_str.isdigit():
to_tuple.append(int(num_str))
else:
to_tuple.append(0)
return tuple(to_tuple)
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()
ver_act = ParseGitVersion(ver_str)
if ver_act is None:
_print('error: "%s" unsupported' % ver_str, file=sys.stderr)
raise CloneFailure()
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()
try:
env['GNUPGHOME'] = gpg_dir
except UnicodeEncodeError:
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: # pylint: disable=bare-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 [401, 403, 404, 501]:
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, clone_bundle):
"""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 clone_bundle and _DownloadBundle(url, local, quiet):
_ImportBundle(local)
_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()
try:
env['GNUPGHOME'] = gpg_dir
except UnicodeEncodeError:
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(object):
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():
gitc_usage = ""
if get_gitc_manifest_dir():
gitc_usage = " gitc-init Initialize a GITC Client.\n"
_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
""" + gitc_usage +
""" 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)
elif args[0] == 'gitc-init':
_GitcInitOptions(init_optparse)
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):
cmd, opt, args = _ParseArguments(orig_args)
repo_main, rel_repo_dir = None, None
# Don't use the local repo copy, make sure to switch to the gitc client first.
if cmd != 'gitc-init':
repo_main, rel_repo_dir = _FindRepo()
wrapper_path = os.path.abspath(__file__)
my_main, my_git = _RunSelf(wrapper_path)
cwd = os.getcwd()
if get_gitc_manifest_dir() and cwd.startswith(get_gitc_manifest_dir()):
_print('error: repo cannot be used in the GITC local manifest directory.'
'\nIf you want to work on this GITC client please rerun this '
'command from the corresponding client under /gitc/',
file=sys.stderr)
sys.exit(1)
if not repo_main:
if opt.help:
_Usage()
if cmd == 'help':
_Help(args)
if not cmd:
_NotInstalled()
if cmd == 'init' or cmd == 'gitc-init':
if my_git:
_SetDefaultsTo(my_git)
try:
_Init(args, gitc_init=(cmd == 'gitc-init'))
except CloneFailure:
path = os.path.join(repodir, S_repo)
_print("fatal: cloning the git-repo repository failed, will remove "
"'%s' " % path, file=sys.stderr)
shutil.rmtree(path, ignore_errors=True)
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__':
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)
main(sys.argv[1:])
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