阅读repo脚本
repo篇幅比较长，但是结构很清晰 记得我们在repo下载代码的时候，经常会出现一些错误，那时我们往往手足无措，可是当我们花点时间分析了repo，发现错误输出的错误往往能够找到真正的原因，因为对目前python不是很熟，只能尽力分析了，同样的，我们在git操作时候，也经常出一些错误，下次会针对常见的git 操作的错误信息进行源码分析
#!/bin/sh
## repo default configuration
##
repo采用的是python语法，通篇也不难，我们慢慢分析
REPO_URL='ssh://[email protected]/git_repo/repo.git'
#变量赋值，指明下载的SSH协议和具体路径
REPO_REV='master'
# 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.
magic='--calling-python-from-/bin/sh--'
"""exec" python -E "$0" "$@" """#$magic"
#巧妙的通过python三引号字串写出了一个能被python和shell script都能理解的代码，以此为界，代码由 Shell 脚本进入了 Python 的世界，这里起名为“魔法”名符其实
if __name__ == '__main__':
#可以理解为"if __name__=="__main__":" 这一句与c中的main()函数所表述的是一致的，即作为入口
import sys
if sys.argv[-1] == '#%s' % magic:
del sys.argv[-1]
del magic
# increment this whenever we make important changes to this script
VERSION = (1, 13)
# increment this if the MAINTAINER_KEYS block is modified
KEYRING_VERSION = (1,0)
MAINTAINER_KEYS = """
Repo Maintainer
-----BEGIN PGP PUBLIC KEY BLOCK-----
Version: GnuPG v1.4.2.2 (GNU/Linux)
mQGiBEj3ugERBACrLJh/ZPyVSKeClMuznFIrsQ+hpNnmJGw1a9GXKYKk8qHPhAZf
WKtrBqAVMNRLhL85oSlekRz98u41H5si5zcuv+IXJDF5MJYcB8f22wAy15lUqPWi
VCkk1l8qqLiuW0fo+ZkPY5qOgrvc0HW1SmdH649uNwqCbcKb6CxaTxzhOwCgj3AP
xI1WfzLqdJjsm1Nq98L0cLcD/iNsILCuw44PRds3J75YP0pze7YF/6WFMB6QSFGu
aUX1FsTTztKNXGms8i5b2l1B8JaLRWq/jOnZzyl1zrUJhkc0JgyZW5oNLGyWGhKD
Fxp5YpHuIuMImopWEMFIRQNrvlg+YVK8t3FpdI1RY0LYqha8pPzANhEYgSfoVzOb
fbfbA/4ioOrxy8ifSoga7ITyZMA+XbW8bx33WXutO9N7SPKS/AK2JpasSEVLZcON
ae5hvAEGVXKxVPDjJBmIc2cOe7kOKSi3OxLzBqrjS2rnjiP4o0ekhZIe4+ocwVOg
e0PLlH5avCqihGRhpoqDRsmpzSHzJIxtoeb+GgGEX8KkUsVAhbQpUmVwbyBNYWlu
dGFpbmVyIDxyZXBvQGFuZHJvaWQua2VybmVsLm9yZz6IYAQTEQIAIAUCSPe6AQIb
AwYLCQgHAwIEFQIIAwQWAgMBAh4BAheAAAoJEBZTDV6SD1xl1GEAn0x/OKQpy7qI
6G73NJviU0IUMtftAKCFMUhGb/0bZvQ8Rm3QCUpWHyEIu7kEDQRI97ogEBAA2wI6
5fs9y/rMwD6dkD/vK9v4C9mOn1IL5JCPYMJBVSci+9ED4ChzYvfq7wOcj9qIvaE0
GwCt2ar7Q56me5J+byhSb32Rqsw/r3Vo5cZMH80N4cjesGuSXOGyEWTe4HYoxnHv
gF4EKI2LK7xfTUcxMtlyn52sUpkfKsCpUhFvdmbAiJE+jCkQZr1Z8u2KphV79Ou+
P1N5IXY/XWOlq48Qf4MWCYlJFrB07xjUjLKMPDNDnm58L5byDrP/eHysKexpbakL
xCmYyfT6DV1SWLblpd2hie0sL3YejdtuBMYMS2rI7Yxb8kGuqkz+9l1qhwJtei94
5MaretDy/d/JH/pRYkRf7L+ke7dpzrP+aJmcz9P1e6gq4NJsWejaALVASBiioqNf
QmtqSVzF1wkR5avZkFHuYvj6V/t1RrOZTXxkSk18KFMJRBZrdHFCWbc5qrVxUB6e
N5pja0NFIUCigLBV1c6I2DwiuboMNh18VtJJh+nwWeez/RueN4ig59gRTtkcc0PR
35tX2DR8+xCCFVW/NcJ4PSePYzCuuLvp1vEDHnj41R52Fz51hgddT4rBsp0nL+5I
socSOIIezw8T9vVzMY4ArCKFAVu2IVyBcahTfBS8q5EM63mONU6UVJEozfGljiMw
xuQ7JwKcw0AUEKTKG7aBgBaTAgT8TOevpvlw91cAAwUP/jRkyVi/0WAb0qlEaq/S
ouWxX1faR+vU3b+Y2/DGjtXQMzG0qpetaTHC/AxxHpgt/dCkWI6ljYDnxgPLwG0a
Oasm94BjZc6vZwf1opFZUKsjOAAxRxNZyjUJKe4UZVuMTk6zo27Nt3LMnc0FO47v
FcOjRyquvgNOS818irVHUf12waDx8gszKxQTTtFxU5/ePB2jZmhP6oXSe4K/LG5T
+WBRPDrHiGPhCzJRzm9BP0lTnGCAj3o9W90STZa65RK7IaYpC8TB35JTBEbrrNCp
w6lzd74LnNEp5eMlKDnXzUAgAH0yzCQeMl7t33QCdYx2hRs2wtTQSjGfAiNmj/WW
Vl5Jn+2jCDnRLenKHwVRFsBX2e0BiRWt/i9Y8fjorLCXVj4z+7yW6DawdLkJorEo
p3v5ILwfC7hVx4jHSnOgZ65L9s8EQdVr1ckN9243yta7rNgwfcqb60ILMFF1BRk/
0V7wCL+68UwwiQDvyMOQuqkysKLSDCLb7BFcyA7j6KG+5hpsREstFX2wK1yKeraz
5xGrFy8tfAaeBMIQ17gvFSp/suc9DYO0ICK2BISzq+F+ZiAKsjMYOBNdH/h0zobQ
HTHs37+/QLMomGEGKZMWi0dShU2J5mNRQu3Hhxl3hHDVbt5CeJBb26aQcQrFz69W
zE3GNvmJosh6leayjtI9P2A6iEkEGBECAAkFAkj3uiACGwwACgkQFlMNXpIPXGWp
TACbBS+Up3RpfYVfd63c1cDdlru13pQAn3NQy/SN858MkxN+zym86UBgOad2
=CMiZ
-----END PGP PUBLIC KEY BLOCK-----
"""
GIT = 'git' # our git command
MIN_GIT_VERSION = (1, 5, 4) # minimum supported git version
repodir = '.repo' # name of repo's private directory
S_repo = 'repo' # special repo reposiory
S_manifests = 'manifests' # special manifest repository
REPO_MAIN = S_repo + '/main.py' # main script
import optparse
import os
import re
import readline
import subprocess
import sys
import urllib2
home_dot_repo = os.path.expanduser('~/.repoconfig')
#返回波浪号~的绝对路径，如果你的当前用户是user的话,返回的便是/home/user/.repoconfig
gpg_dir = os.path.join(home_dot_repo, 'gnupg')
#将 home_dot_repo这个变量和'gnupg'连接起来，返回的路径是/home/user/.repoconfig/gnupg
extra_args = [
] #定义参数数组
init_optparse = optparse.OptionParser(usage="repo init -u url [options]")
# optparse是专门用来在命令行添加选项的一个模块 很显然，这是再添加一个usage
# Logging
group = init_optparse.add_option_group('Logging options')
# 增加Logging options这一项帮助信息
group.add_option('-q', '--quiet',
dest="quiet", action="store_true", default=False,
help="be quiet")
# Manifest
# 增加Manifest options这一项的帮助信息
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='mirror the forrest')
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')
# Tool
# 增加Manifest options这一项的帮助信息
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')
class CloneFailure(Exception):
#定义类 CloneFailure
"""Indicate the remote clone of repo itself failed.
# 类文档
"""
def _Init(args):
#类方法
"""Installs repo by cloning it over the network.
#方法文档
"""
opt, args = init_optparse.parse_args(args)
#如果参数中没有manifest_url，打印usage，退出
if args or not opt.manifest_url:
init_optparse.print_usage()
sys.exit(1)
url = opt.repo_url
#如果没有配置--repo-url的REPO URL，就用默认变量REPO_URL的值 REPO_URL='ssh://[email protected]/git_repo/repo.git'
if not url:
url = REPO_URL
extra_args.append('--repo-url=%s' % url)
branch = opt.repo_branch
#如果没有配置repo branch分支，就用默认变量REPO_REV的值 REPO_REV="master"
if not branch:
branch = REPO_REV
extra_args.append('--repo-branch=%s' % branch)
if branch.startswith('refs/heads/'):
#对分支名进行check，如果带有refs/heads/这种前缀，就去掉比如说如果branch=refs/heads/master ，就把branch=master
branch = branch[len('refs/heads/'):]
if branch.startswith('refs/'):
print >>sys.stderr, "fatal: invalid branch name '%s'" % branch
raise CloneFailure()
if not os.path.isdir(repodir): #repodir=".repo"
#如果不存在.repo这个目录，就尝试创建这个.repo这个目录
try:
os.mkdir(repodir)
except OSError, e:
print >>sys.stderr, \
'fatal: cannot make %s directory: %s' % (
repodir, e.strerror)
# Don't faise CloneFailure; that would delete the
# name. Instead exit immediately.
#
sys.exit(1)
_CheckGitVersion()
#检测GIT的版本
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 >>sys.stderr, \
'fatal: repo init failed; run without --quiet to see why'
raise
def _CheckGitVersion():
#执行命令 git --version 取出得到的值，跟MIN_GIT_VERSION的值进行比较，这个变量的值是（1,5,4）也就是1.5.4，如果低于这个版本，将无法使用repo下载源码
cmd = [GIT, '--version']
# 在《Ubuntu12.04 搭建GIT环境 下载Softwinner A10源代码》一文中，提到过，如果git版本过低的解决办法
proc = subprocess.Popen(cmd, stdout=subprocess.PIPE)
ver_str = proc.stdout.read().strip()
proc.stdout.close()
proc.wait()
if not ver_str.startswith('git version '):
print >>sys.stderr, 'error: "%s" unsupported' % ver_str
raise CloneFailure()
ver_str = ver_str[len('git version '):].strip()
ver_act = tuple(map(lambda x: int(x), ver_str.split('.')[0:3]))
if ver_act < MIN_GIT_VERSION:
need = '.'.join(map(lambda x: str(x), MIN_GIT_VERSION))
print >>sys.stderr, 'fatal: git %s or later required' % need
raise CloneFailure()
def _NeedSetupGnuPG():
#如果不存在目录home_dot_repo 也就是/home/user/.repoconfig这个目录的话，返回true，表示需要创建
if not os.path.isdir(home_dot_repo):
return True
kv = os.path.join(home_dot_repo, 'keyring-version')
#如果存在/home/user/.repoconfig这个目录，查找下一级的keyring-version
if not os.path.exists(kv):
return True
kv = open(kv).read()
#打开/home/user/.repoconfig/keyring-version这个文件不成功，任然返回true
if not kv:
return True
kv = tuple(map(lambda x: int(x), kv.split('.')))
#解析出的版本过低 小于KEYRING_VERSION （1 , 0）
if kv < KEYRING_VERSION:
return True
return False
# 这些验证都通过才返回false
def _SetupGnuPG(quiet):
# 如果_CheckGitVersion()验证没通过，接着就要_SetupGnuPG创建相应的文件，比如/home/user/.repoconfig/keyring-version，结合_CheckGitVersion()的分析，很容易弄明白
if not os.path.isdir(home_dot_repo):
try:
os.mkdir(home_dot_repo)
except OSError, e:
print >>sys.stderr, \
'fatal: cannot make %s directory: %s' % (
home_dot_repo, e.strerror)
sys.exit(1)
if not os.path.isdir(gpg_dir):
try:
os.mkdir(gpg_dir, 0700)
except OSError, e:
print >>sys.stderr, \
'fatal: cannot make %s directory: %s' % (
gpg_dir, e.strerror)
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, e:
if not quiet:
print >>sys.stderr, 'warning: gpg (GnuPG) is not available.'
print >>sys.stderr, 'warning: Installing it is strongly encouraged.'
print >>sys.stderr
return False
proc.stdin.write(MAINTAINER_KEYS)
proc.stdin.close()
if proc.wait() != 0:
print >>sys.stderr, 'fatal: registering repo maintainer keys failed'
sys.exit(1)
print
fd = open(os.path.join(home_dot_repo, 'keyring-version'), 'w')
fd.write('.'.join(map(lambda x: str(x), KEYRING_VERSION)) + '\n')
fd.close()
return True
def _SetConfig(local, name, value): # 执行git config [name value]命令
"""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 = urllib2.HTTPPasswordMgrWithDefaultRealm()
#Basic认证
try:
import netrc
n = netrc.netrc()
for host in n.hosts:
p = n.hosts[host]
mgr.add_password(None, 'http://%s/' % host, p[0], p[2])
mgr.add_password(None, 'https://%s/' % host, p[0], p[2])
except:
pass
handlers.append(urllib2.HTTPBasicAuthHandler(mgr))
if 'http_proxy' in os.environ:
url = os.environ['http_proxy']
handlers.append(urllib2.ProxyHandler({'http': url, 'https': url}))
if 'REPO_CURL_VERBOSE' in os.environ:
handlers.append(urllib2.HTTPHandler(debuglevel=1))
handlers.append(urllib2.HTTPSHandler(debuglevel=1))
urllib2.install_opener(urllib2.build_opener(*handlers))
def _Fetch(url, local, src, quiet):
#此方法相当于在终端执行git fetch命令
if not quiet:
print >>sys.stderr, 'Get %s' % url
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('/'):
#给url最后添加/clone.bundle
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:'):
#检查url是以http或https开头的
return False
dest = open(os.path.join(local, '.git', 'clone.bundle'), 'w+b')
#打开目标clone.bundle
try:
try:
r = urllib2.urlopen(url)
# 开始进行HTTP协议的通信
except urllib2.HTTPError, e:
if e.code == 404:
return False
print >>sys.stderr, 'fatal: Cannot get %s' % url
print >>sys.stderr, 'fatal: HTTP error %s' % e.code
raise CloneFailure()
except urllib2.URLError, e:
print >>sys.stderr, 'fatal: Cannot get %s' % url
print >>sys.stderr, 'fatal: error %s' % e.reason
raise CloneFailure()
try:
if not quiet:
print >>sys.stderr, 'Get %s' % url
while True:
buf = r.read(8192)
if buf == '':
return True
dest.write(buf)
# 把下载的文件写到local指定的路径
finally:
r.close()
finally:
dest.close()
def _ImportBundle(local):
#导入已经下载好的bundle
path = os.path.join(local, '.git', 'clone.bundle')
try:
_Fetch(local, local, path, True)
finally:
os.remove(path)
def _Clone(url, local, quiet):
# 根据url的地址，逐个进行git clone的操作，把代码从仓库中clone下来
"""Clones a git repository to a new subdirectory of repodir
"""
loc=local.replace('.repo/repo','.repo')
try:
os.mkdir(loc)
except OSError, e:
print >>sys.stderr, 'creat :%s' % loc
#raise CloneFailure()
print >>sys.stderr, "git clone repo from % s" % REPO_URL
cmd = [GIT, 'clone', REPO_URL]
try:
proc = subprocess.Popen(cmd, cwd = loc)
except OSError, e:
print >>sys.stderr
print >>sys.stderr, "fatal: '%s' is not available" % GIT
print >>sys.stderr, 'fatal: %s' % e
print >>sys.stderr
print >>sys.stderr, 'Please make sure %s is installed'\
' and in your path.' % GIT
raise CloneFailure()
if proc.wait() != 0:
print >>sys.stderr, 'fatal: could not create %s' % local
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):
# 确认当前分支branch的tag
"""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 >>sys.stderr
print >>sys.stderr,\
"fatal: branch '%s' has not been signed" \
% branch
raise CloneFailure()
m = re.compile(r'^(.*)-[0-9]{1,}-g[0-9a-f]{1,}$').match(cur)
#正则表达式解析 ^ 开始符 (.*)表示任意个数的字符 [0-9]{1,} [0,9]表示是数字 {1,}表示个数至少是1个，也可能是成千上万 [0-9a-f]{1,} 表示是个数大于1的十六进制字符的字符串 $表示结束符
if m:
cur = m.group(1)
if not quiet:
print >>sys.stderr
print >>sys.stderr, \
"info: Ignoring branch '%s'; using tagged release '%s'" \
% (branch, cur)
print >>sys.stderr
env = os.environ.copy()
#获取环境变量
env['GNUPGHOME'] = gpg_dir.encode()
cmd = [GIT, 'tag', '-v', cur]
# 执行git tag -v 验证gpg签名的tag
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 >>sys.stderr
print >>sys.stderr, out
print >>sys.stderr, err
print >>sys.stderr
raise CloneFailure()
return '%s^0' % cur
def _Checkout(cwd, branch, rev, quiet):
# 相当于执行git checkout
"""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.
"""
dir = os.getcwd()
#获取当前目录
repo = None
olddir = None
# 在当前目录循环查找main.py
while dir != '/' \
and dir != olddir \
and not repo:
repo = os.path.join(dir, repodir, REPO_MAIN)
#/home/user/.repo/repo/main.py主入口
if not os.path.isfile(repo):
repo = None
olddir = dir
dir = os.path.dirname(dir)
return (repo, os.path.join(dir, repodir))
class _Options:
#Options 类
help = False
def _ParseArguments(args):
# 解析参数
cmd = None
opt = _Options()
arg = []
for i in xrange(0, 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 >>sys.stderr,\
"""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").
"""
sys.exit(1)
def _Help(args):
if args:
if args[0] == 'init':
init_optparse.print_help()
sys.exit(0)
else:
print >>sys.stderr,\
"error: '%s' is not a bootstrap command.\n"\
' For access to online help, install repo ("repo init").'\
% args[0]
else:
_Usage()
sys.exit(1)
def _NotInstalled():
print >>sys.stderr,\
'error: repo is not installed. Use "repo init" to install it here.'
sys.exit(1)
def _NoCommands(cmd):
print >>sys.stderr,\
"""error: command '%s' requires repo to be installed first.
Use "repo init" to install it here.""" % cmd
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 >>sys.stderr, 'fatal: %s has no current branch' % gitdir
sys.exit(1)
def main(orig_args):
main, dir = _FindRepo()
cmd, opt, args = _ParseArguments(orig_args)
wrapper_path = os.path.abspath(__file__)
my_main, my_git = _RunSelf(wrapper_path)
if not 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)
main, dir = _FindRepo()
else:
_NoCommands(cmd)
if my_main:
main = my_main
ver_str = '.'.join(map(lambda x: str(x), VERSION))
me = [main,
'--repo-dir=%s' % dir,
'--wrapper-version=%s' % ver_str,
'--wrapper-path=%s' % wrapper_path,
'--']
me.extend(orig_args)
me.extend(extra_args)
try:
os.execv(main, me)
except OSError, e:
print >>sys.stderr, "fatal: unable to start %s" % main
print >>sys.stderr, "fatal: %s" % e
sys.exit(148)
if __name__ == '__main__':
main(sys.argv[1:])