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59bbb580e3
git-repo/main.py
David Pursehouse 59bbb580e3 Move Python version checking to a separate module 
Add a new module with methods for checking the Python version.

Instead of handling Python3 imports with try...except blocks, first
check the python version and then import the relevant modules.  This
makes the code a bit cleaner and will result in less diff when/if we
remove support for Python < 3 later.

Use the same mechanism to handle `input` vs. `raw_input` and add
suppression of pylint warnings caused by redefinition of the built-in
method `input`.

Change-Id: Ia403e525b88d77640a741ac50382146e7d635924
Also-by: Chirayu Desai <cdesai@cyanogenmod.org>
Signed-off-by: Chirayu Desai <cdesai@cyanogenmod.org>
2013-05-23 07:28:53 +00:00

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#!/usr/bin/env python
#
# Copyright (C) 2008 The Android Open Source Project
#
# 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.
from __future__ import print_function
import getpass
import imp
import netrc
import optparse
import os
import sys
import time
from pyversion import is_python3
if is_python3():
import urllib.request
else:
import urllib2
urllib = imp.new_module('urllib')
urllib.request = urllib2
from trace import SetTrace
from git_command import git, GitCommand
from git_config import init_ssh, close_ssh
from command import InteractiveCommand
from command import MirrorSafeCommand
from subcmds.version import Version
from editor import Editor
from error import DownloadError
from error import ManifestInvalidRevisionError
from error import ManifestParseError
from error import NoManifestException
from error import NoSuchProjectError
from error import RepoChangedException
from manifest_xml import XmlManifest
from pager import RunPager
from subcmds import all_commands
if not is_python3():
# pylint:disable=W0622
input = raw_input
# pylint:enable=W0622
global_options = optparse.OptionParser(
usage="repo [-p|--paginate|--no-pager] COMMAND [ARGS]"
)
global_options.add_option('-p', '--paginate',
dest='pager', action='store_true',
help='display command output in the pager')
global_options.add_option('--no-pager',
dest='no_pager', action='store_true',
help='disable the pager')
global_options.add_option('--trace',
dest='trace', action='store_true',
help='trace git command execution')
global_options.add_option('--time',
dest='time', action='store_true',
help='time repo command execution')
global_options.add_option('--version',
dest='show_version', action='store_true',
help='display this version of repo')
class _Repo(object):
def __init__(self, repodir):
self.repodir = repodir
self.commands = all_commands
# add 'branch' as an alias for 'branches'
all_commands['branch'] = all_commands['branches']
def _Run(self, argv):
result = 0
name = None
glob = []
for i in range(len(argv)):
if not argv[i].startswith('-'):
name = argv[i]
if i > 0:
glob = argv[:i]
argv = argv[i + 1:]
break
if not name:
glob = argv
name = 'help'
argv = []
gopts, _gargs = global_options.parse_args(glob)
if gopts.trace:
SetTrace()
if gopts.show_version:
if name == 'help':
name = 'version'
else:
print('fatal: invalid usage of --version', file=sys.stderr)
return 1
try:
cmd = self.commands[name]
except KeyError:
print("repo: '%s' is not a repo command. See 'repo help'." % name,
file=sys.stderr)
return 1
cmd.repodir = self.repodir
cmd.manifest = XmlManifest(cmd.repodir)
Editor.globalConfig = cmd.manifest.globalConfig
if not isinstance(cmd, MirrorSafeCommand) and cmd.manifest.IsMirror:
print("fatal: '%s' requires a working directory" % name,
file=sys.stderr)
return 1
copts, cargs = cmd.OptionParser.parse_args(argv)
copts = cmd.ReadEnvironmentOptions(copts)
if not gopts.no_pager and not isinstance(cmd, InteractiveCommand):
config = cmd.manifest.globalConfig
if gopts.pager:
use_pager = True
else:
use_pager = config.GetBoolean('pager.%s' % name)
if use_pager is None:
use_pager = cmd.WantPager(copts)
if use_pager:
RunPager(config)
start = time.time()
try:
result = cmd.Execute(copts, cargs)
except DownloadError as e:
print('error: %s' % str(e), file=sys.stderr)
result = 1
except ManifestInvalidRevisionError as e:
print('error: %s' % str(e), file=sys.stderr)
result = 1
except NoManifestException as e:
print('error: manifest required for this command -- please run init',
file=sys.stderr)
result = 1
except NoSuchProjectError as e:
if e.name:
print('error: project %s not found' % e.name, file=sys.stderr)
else:
print('error: no project in current directory', file=sys.stderr)
result = 1
finally:
elapsed = time.time() - start
hours, remainder = divmod(elapsed, 3600)
minutes, seconds = divmod(remainder, 60)
if gopts.time:
if hours == 0:
print('real\t%dm%.3fs' % (minutes, seconds), file=sys.stderr)
else:
print('real\t%dh%dm%.3fs' % (hours, minutes, seconds),
file=sys.stderr)
return result
def _MyRepoPath():
return os.path.dirname(__file__)
def _MyWrapperPath():
return os.path.join(os.path.dirname(__file__), 'repo')
_wrapper_module = None
def WrapperModule():
global _wrapper_module
if not _wrapper_module:
_wrapper_module = imp.load_source('wrapper', _MyWrapperPath())
return _wrapper_module
def _CurrentWrapperVersion():
return WrapperModule().VERSION
def _CheckWrapperVersion(ver, repo_path):
if not repo_path:
repo_path = '~/bin/repo'
if not ver:
print('no --wrapper-version argument', file=sys.stderr)
sys.exit(1)
exp = _CurrentWrapperVersion()
ver = tuple(map(int, ver.split('.')))
if len(ver) == 1:
ver = (0, ver[0])
exp_str = '.'.join(map(str, exp))
if exp[0] > ver[0] or ver < (0, 4):
print("""
!!! A new repo command (%5s) is available. !!!
!!! You must upgrade before you can continue: !!!
cp %s %s
""" % (exp_str, _MyWrapperPath(), repo_path), file=sys.stderr)
sys.exit(1)
if exp > ver:
print("""
... A new repo command (%5s) is available.
... You should upgrade soon:
cp %s %s
""" % (exp_str, _MyWrapperPath(), repo_path), file=sys.stderr)
def _CheckRepoDir(repo_dir):
if not repo_dir:
print('no --repo-dir argument', file=sys.stderr)
sys.exit(1)
def _PruneOptions(argv, opt):
i = 0
while i < len(argv):
a = argv[i]
if a == '--':
break
if a.startswith('--'):
eq = a.find('=')
if eq > 0:
a = a[0:eq]
if not opt.has_option(a):
del argv[i]
continue
i += 1
_user_agent = None
def _UserAgent():
global _user_agent
if _user_agent is None:
py_version = sys.version_info
os_name = sys.platform
if os_name == 'linux2':
os_name = 'Linux'
elif os_name == 'win32':
os_name = 'Win32'
elif os_name == 'cygwin':
os_name = 'Cygwin'
elif os_name == 'darwin':
os_name = 'Darwin'
p = GitCommand(
None, ['describe', 'HEAD'],
cwd = _MyRepoPath(),
capture_stdout = True)
if p.Wait() == 0:
repo_version = p.stdout
if len(repo_version) > 0 and repo_version[-1] == '\n':
repo_version = repo_version[0:-1]
if len(repo_version) > 0 and repo_version[0] == 'v':
repo_version = repo_version[1:]
else:
repo_version = 'unknown'
_user_agent = 'git-repo/%s (%s) git/%s Python/%d.%d.%d' % (
repo_version,
os_name,
'.'.join(map(str, git.version_tuple())),
py_version[0], py_version[1], py_version[2])
return _user_agent
class _UserAgentHandler(urllib.request.BaseHandler):
def http_request(self, req):
req.add_header('User-Agent', _UserAgent())
return req
def https_request(self, req):
req.add_header('User-Agent', _UserAgent())
return req
def _AddPasswordFromUserInput(handler, msg, req):
# If repo could not find auth info from netrc, try to get it from user input
url = req.get_full_url()
user, password = handler.passwd.find_user_password(None, url)
if user is None:
print(msg)
try:
user = input('User: ')
password = getpass.getpass()
except KeyboardInterrupt:
return
handler.passwd.add_password(None, url, user, password)
class _BasicAuthHandler(urllib.request.HTTPBasicAuthHandler):
def http_error_401(self, req, fp, code, msg, headers):
_AddPasswordFromUserInput(self, msg, req)
return urllib.request.HTTPBasicAuthHandler.http_error_401(
self, req, fp, code, msg, headers)
def http_error_auth_reqed(self, authreq, host, req, headers):
try:
old_add_header = req.add_header
def _add_header(name, val):
val = val.replace('\n', '')
old_add_header(name, val)
req.add_header = _add_header
return urllib.request.AbstractBasicAuthHandler.http_error_auth_reqed(
self, authreq, host, req, headers)
except:
reset = getattr(self, 'reset_retry_count', None)
if reset is not None:
reset()
elif getattr(self, 'retried', None):
self.retried = 0
raise
class _DigestAuthHandler(urllib.request.HTTPDigestAuthHandler):
def http_error_401(self, req, fp, code, msg, headers):
_AddPasswordFromUserInput(self, msg, req)
return urllib.request.HTTPDigestAuthHandler.http_error_401(
self, req, fp, code, msg, headers)
def http_error_auth_reqed(self, auth_header, host, req, headers):
try:
old_add_header = req.add_header
def _add_header(name, val):
val = val.replace('\n', '')
old_add_header(name, val)
req.add_header = _add_header
return urllib.request.AbstractDigestAuthHandler.http_error_auth_reqed(
self, auth_header, host, req, headers)
except:
reset = getattr(self, 'reset_retry_count', None)
if reset is not None:
reset()
elif getattr(self, 'retried', None):
self.retried = 0
raise
def init_http():
handlers = [_UserAgentHandler()]
mgr = urllib.request.HTTPPasswordMgrWithDefaultRealm()
try:
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 netrc.NetrcParseError:
pass
except IOError:
pass
handlers.append(_BasicAuthHandler(mgr))
handlers.append(_DigestAuthHandler(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 _Main(argv):
result = 0
opt = optparse.OptionParser(usage="repo wrapperinfo -- ...")
opt.add_option("--repo-dir", dest="repodir",
help="path to .repo/")
opt.add_option("--wrapper-version", dest="wrapper_version",
help="version of the wrapper script")
opt.add_option("--wrapper-path", dest="wrapper_path",
help="location of the wrapper script")
_PruneOptions(argv, opt)
opt, argv = opt.parse_args(argv)
_CheckWrapperVersion(opt.wrapper_version, opt.wrapper_path)
_CheckRepoDir(opt.repodir)
Version.wrapper_version = opt.wrapper_version
Version.wrapper_path = opt.wrapper_path
repo = _Repo(opt.repodir)
try:
try:
init_ssh()
init_http()
result = repo._Run(argv) or 0
finally:
close_ssh()
except KeyboardInterrupt:
print('aborted by user', file=sys.stderr)
result = 1
except ManifestParseError as mpe:
print('fatal: %s' % mpe, file=sys.stderr)
result = 1
except RepoChangedException as rce:
# If repo changed, re-exec ourselves.
#
argv = list(sys.argv)
argv.extend(rce.extra_args)
try:
os.execv(__file__, argv)
except OSError as e:
print('fatal: cannot restart repo after upgrade', file=sys.stderr)
print('fatal: %s' % e, file=sys.stderr)
result = 128
sys.exit(result)
if __name__ == '__main__':
_Main(sys.argv[1:])
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