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#
# 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 contextlib
import errno
import json
import os
import re
import subprocess
import sys
try:
import threading as _threading
except ImportError:
import dummy_threading as _threading
import time
from pyversion import is_python3
if is_python3():
import urllib.request
import urllib.error
else:
import urllib2
import imp
urllib = imp.new_module('urllib')
urllib.request = urllib2
urllib.error = urllib2
from signal import SIGTERM
from error import GitError, UploadError
from trace import Trace
if is_python3():
from http.client import HTTPException
else:
from httplib import HTTPException
from git_command import GitCommand
from git_command import ssh_sock
from git_command import terminate_ssh_clients
R_HEADS = 'refs/heads/'
R_TAGS = 'refs/tags/'
ID_RE = re.compile(r'^[0-9a-f]{40}$')
REVIEW_CACHE = dict()
def IsId(rev):
return ID_RE.match(rev)
def _key(name):
parts = name.split('.')
if len(parts) < 2:
return name.lower()
parts[ 0] = parts[ 0].lower()
parts[-1] = parts[-1].lower()
return '.'.join(parts)
class GitConfig(object):
_ForUser = None
@classmethod
def ForUser(cls):
if cls._ForUser is None:
cls._ForUser = cls(configfile = os.path.expanduser('~/.gitconfig'))
return cls._ForUser
@classmethod
def ForRepository(cls, gitdir, defaults=None):
return cls(configfile = os.path.join(gitdir, 'config'),
defaults = defaults)
def __init__(self, configfile, defaults=None, jsonFile=None):
self.file = configfile
self.defaults = defaults
self._cache_dict = None
self._section_dict = None
self._remotes = {}
self._branches = {}
self._json = jsonFile
if self._json is None:
self._json = os.path.join(
os.path.dirname(self.file),
'.repo_' + os.path.basename(self.file) + '.json')
def Has(self, name, include_defaults = True):
"""Return true if this configuration file has the key.
"""
if _key(name) in self._cache:
return True
if include_defaults and self.defaults:
return self.defaults.Has(name, include_defaults = True)
return False
def GetBoolean(self, name):
"""Returns a boolean from the configuration file.
None : The value was not defined, or is not a boolean.
True : The value was set to true or yes.
False: The value was set to false or no.
"""
v = self.GetString(name)
if v is None:
return None
v = v.lower()
if v in ('true', 'yes'):
return True
if v in ('false', 'no'):
return False
return None
def GetString(self, name, all_keys=False):
"""Get the first value for a key, or None if it is not defined.
This configuration file is used first, if the key is not
defined or all_keys = True then the defaults are also searched.
"""
try:
v = self._cache[_key(name)]
except KeyError:
if self.defaults:
return self.defaults.GetString(name, all_keys = all_keys)
v = []
if not all_keys:
if v:
return v[0]
return None
r = []
r.extend(v)
if self.defaults:
r.extend(self.defaults.GetString(name, all_keys = True))
return r
def SetString(self, name, value):
"""Set the value(s) for a key.
Only this configuration file is modified.
The supplied value should be either a string,
or a list of strings (to store multiple values).
"""
key = _key(name)
try:
old = self._cache[key]
except KeyError:
old = []
if value is None:
if old:
del self._cache[key]
self._do('--unset-all', name)
elif isinstance(value, list):
if len(value) == 0:
self.SetString(name, None)
elif len(value) == 1:
self.SetString(name, value[0])
elif old != value:
self._cache[key] = list(value)
self._do('--replace-all', name, value[0])
for i in range(1, len(value)):
self._do('--add', name, value[i])
elif len(old) != 1 or old[0] != value:
self._cache[key] = [value]
self._do('--replace-all', name, value)
def GetRemote(self, name):
"""Get the remote.$name.* configuration values as an object.
"""
try:
r = self._remotes[name]
except KeyError:
r = Remote(self, name)
self._remotes[r.name] = r
return r
def GetBranch(self, name):
"""Get the branch.$name.* configuration values as an object.
"""
try:
b = self._branches[name]
except KeyError:
b = Branch(self, name)
self._branches[b.name] = b
return b
def GetSubSections(self, section):
"""List all subsection names matching $section.*.*
"""
return self._sections.get(section, set())
def HasSection(self, section, subsection = ''):
"""Does at least one key in section.subsection exist?
"""
try:
return subsection in self._sections[section]
except KeyError:
return False
def UrlInsteadOf(self, url):
"""Resolve any url.*.insteadof references.
"""
for new_url in self.GetSubSections('url'):
for old_url in self.GetString('url.%s.insteadof' % new_url, True):
if old_url is not None and url.startswith(old_url):
return new_url + url[len(old_url):]
return url
@property
def _sections(self):
d = self._section_dict
if d is None:
d = {}
for name in self._cache.keys():
p = name.split('.')
if 2 == len(p):
section = p[0]
subsect = ''
else:
section = p[0]
subsect = '.'.join(p[1:-1])
if section not in d:
d[section] = set()
d[section].add(subsect)
self._section_dict = d
return d
@property
def _cache(self):
if self._cache_dict is None:
self._cache_dict = self._Read()
return self._cache_dict
def _Read(self):
d = self._ReadJson()
if d is None:
d = self._ReadGit()
self._SaveJson(d)
return d
def _ReadJson(self):
try:
if os.path.getmtime(self._json) \
<= os.path.getmtime(self.file):
os.remove(self._json)
return None
except OSError:
return None
try:
Trace(': parsing %s', self.file)
fd = open(self._json)
try:
return json.load(fd)
finally:
fd.close()
except (IOError, ValueError):
os.remove(self._json)
return None
def _SaveJson(self, cache):
try:
fd = open(self._json, 'w')
try:
json.dump(cache, fd, indent=2)
finally:
fd.close()
except (IOError, TypeError):
if os.path.exists(self._json):
os.remove(self._json)
def _ReadGit(self):
"""
Read configuration data from git.
This internal method populates the GitConfig cache.
"""
c = {}
d = self._do('--null', '--list')
if d is None:
return c
for line in d.decode('utf-8').rstrip('\0').split('\0'): # pylint: disable=W1401
# Backslash is not anomalous
if '\n' in line:
key, val = line.split('\n', 1)
else:
key = line
val = None
if key in c:
c[key].append(val)
else:
c[key] = [val]
return c
def _do(self, *args):
command = ['config', '--file', self.file]
command.extend(args)
p = GitCommand(None,
command,
capture_stdout = True,
capture_stderr = True)
if p.Wait() == 0:
return p.stdout
else:
GitError('git config %s: %s' % (str(args), p.stderr))
class RefSpec(object):
"""A Git refspec line, split into its components:
forced: True if the line starts with '+'
src: Left side of the line
dst: Right side of the line
"""
@classmethod
def FromString(cls, rs):
lhs, rhs = rs.split(':', 2)
if lhs.startswith('+'):
lhs = lhs[1:]
forced = True
else:
forced = False
return cls(forced, lhs, rhs)
def __init__(self, forced, lhs, rhs):
self.forced = forced
self.src = lhs
self.dst = rhs
def SourceMatches(self, rev):
if self.src:
if rev == self.src:
return True
if self.src.endswith('/*') and rev.startswith(self.src[:-1]):
return True
return False
def DestMatches(self, ref):
if self.dst:
if ref == self.dst:
return True
if self.dst.endswith('/*') and ref.startswith(self.dst[:-1]):
return True
return False
def MapSource(self, rev):
if self.src.endswith('/*'):
return self.dst[:-1] + rev[len(self.src) - 1:]
return self.dst
def __str__(self):
s = ''
if self.forced:
s += '+'
if self.src:
s += self.src
if self.dst:
s += ':'
s += self.dst
return s
_master_processes = []
_master_keys = set()
_ssh_master = True
_master_keys_lock = None
def init_ssh():
"""Should be called once at the start of repo to init ssh master handling.
At the moment, all we do is to create our lock.
"""
global _master_keys_lock
assert _master_keys_lock is None, "Should only call init_ssh once"
_master_keys_lock = _threading.Lock()
def _open_ssh(host, port=None):
global _ssh_master
# Acquire the lock. This is needed to prevent opening multiple masters for
# the same host when we're running "repo sync -jN" (for N > 1) _and_ the
# manifest <remote fetch="ssh://xyz"> specifies a different host from the
# one that was passed to repo init.
_master_keys_lock.acquire()
try:
# Check to see whether we already think that the master is running; if we
# think it's already running, return right away.
if port is not None:
key = '%s:%s' % (host, port)
else:
key = host
if key in _master_keys:
return True
if not _ssh_master \
or 'GIT_SSH' in os.environ \
or sys.platform in ('win32', 'cygwin'):
# failed earlier, or cygwin ssh can't do this
#
return False
# We will make two calls to ssh; this is the common part of both calls.
command_base = ['ssh',
'-o','ControlPath %s' % ssh_sock(),
host]
if port is not None:
command_base[1:1] = ['-p', str(port)]
# Since the key wasn't in _master_keys, we think that master isn't running.
# ...but before actually starting a master, we'll double-check. This can
# be important because we can't tell that that 'git@myhost.com' is the same
# as 'myhost.com' where "User git" is setup in the user's ~/.ssh/config file.
check_command = command_base + ['-O','check']
try:
Trace(': %s', ' '.join(check_command))
check_process = subprocess.Popen(check_command,
stdout=subprocess.PIPE,
stderr=subprocess.PIPE)
check_process.communicate() # read output, but ignore it...
isnt_running = check_process.wait()
if not isnt_running:
# Our double-check found that the master _was_ infact running. Add to
# the list of keys.
_master_keys.add(key)
return True
except Exception:
# Ignore excpetions. We we will fall back to the normal command and print
# to the log there.
pass
command = command_base[:1] + \
['-M', '-N'] + \
command_base[1:]
try:
Trace(': %s', ' '.join(command))
p = subprocess.Popen(command)
except Exception as e:
_ssh_master = False
print('\nwarn: cannot enable ssh control master for %s:%s\n%s'
% (host,port, str(e)), file=sys.stderr)
return False
time.sleep(1)
ssh_died = (p.poll() is not None)
if ssh_died:
return False
_master_processes.append(p)
_master_keys.add(key)
return True
finally:
_master_keys_lock.release()
def close_ssh():
global _master_keys_lock
terminate_ssh_clients()
for p in _master_processes:
try:
os.kill(p.pid, SIGTERM)
p.wait()
except OSError:
pass
del _master_processes[:]
_master_keys.clear()
d = ssh_sock(create=False)
if d:
try:
os.rmdir(os.path.dirname(d))
except OSError:
pass
# We're done with the lock, so we can delete it.
_master_keys_lock = None
URI_SCP = re.compile(r'^([^@:]*@?[^:/]{1,}):')
URI_ALL = re.compile(r'^([a-z][a-z+-]*)://([^@/]*@?[^/]*)/')
def GetSchemeFromUrl(url):
m = URI_ALL.match(url)
if m:
return m.group(1)
return None
@contextlib.contextmanager
def GetUrlCookieFile(url, quiet):
if url.startswith('persistent-'):
try:
p = subprocess.Popen(
['git-remote-persistent-https', '-print_config', url],
stdin=subprocess.PIPE, stdout=subprocess.PIPE,
stderr=subprocess.PIPE)
try:
cookieprefix = 'http.cookiefile='
proxyprefix = 'http.proxy='
cookiefile = None
proxy = None
for line in p.stdout:
line = line.strip()
if line.startswith(cookieprefix):
cookiefile = line[len(cookieprefix):]
if line.startswith(proxyprefix):
proxy = line[len(proxyprefix):]
# Leave subprocess open, as cookie file may be transient.
if cookiefile or proxy:
yield cookiefile, proxy
return
finally:
p.stdin.close()
if p.wait():
err_msg = p.stderr.read()
if ' -print_config' in err_msg:
pass # Persistent proxy doesn't support -print_config.
elif not quiet:
print(err_msg, file=sys.stderr)
except OSError as e:
if e.errno == errno.ENOENT:
pass # No persistent proxy.
raise
yield GitConfig.ForUser().GetString('http.cookiefile'), None
def _preconnect(url):
m = URI_ALL.match(url)
if m:
scheme = m.group(1)
host = m.group(2)
if ':' in host:
host, port = host.split(':')
else:
port = None
if scheme in ('ssh', 'git+ssh', 'ssh+git'):
return _open_ssh(host, port)
return False
m = URI_SCP.match(url)
if m:
host = m.group(1)
return _open_ssh(host)
return False
class Remote(object):
"""Configuration options related to a remote.
"""
def __init__(self, config, name):
self._config = config
self.name = name
self.url = self._Get('url')
self.pushUrl = self._Get('pushurl')
self.review = self._Get('review')
self.projectname = self._Get('projectname')
self.fetch = list(map(RefSpec.FromString,
self._Get('fetch', all_keys=True)))
self._review_url = None
def _InsteadOf(self):
globCfg = GitConfig.ForUser()
urlList = globCfg.GetSubSections('url')
longest = ""
longestUrl = ""
for url in urlList:
key = "url." + url + ".insteadOf"
insteadOfList = globCfg.GetString(key, all_keys=True)
for insteadOf in insteadOfList:
if self.url.startswith(insteadOf) \
and len(insteadOf) > len(longest):
longest = insteadOf
longestUrl = url
if len(longest) == 0:
return self.url
return self.url.replace(longest, longestUrl, 1)
def PreConnectFetch(self):
connectionUrl = self._InsteadOf()
return _preconnect(connectionUrl)
def ReviewUrl(self, userEmail):
if self._review_url is None:
if self.review is None:
return None
u = self.review
if u.startswith('persistent-'):
u = u[len('persistent-'):]
if u.split(':')[0] not in ('http', 'https', 'sso'):
u = 'http://%s' % u
if u.endswith('/Gerrit'):
u = u[:len(u) - len('/Gerrit')]
if u.endswith('/ssh_info'):
u = u[:len(u) - len('/ssh_info')]
if not u.endswith('/'):
u += '/'
http_url = u
if u in REVIEW_CACHE:
self._review_url = REVIEW_CACHE[u]
elif 'REPO_HOST_PORT_INFO' in os.environ:
host, port = os.environ['REPO_HOST_PORT_INFO'].split()
self._review_url = self._SshReviewUrl(userEmail, host, port)
REVIEW_CACHE[u] = self._review_url
elif u.startswith('sso:'):
self._review_url = u # Assume it's right
REVIEW_CACHE[u] = self._review_url
else:
try:
info_url = u + 'ssh_info'
info = urllib.request.urlopen(info_url).read()
if info == 'NOT_AVAILABLE' or '<' in info:
# If `info` contains '<', we assume the server gave us some sort
# of HTML response back, like maybe a login page.
#
# Assume HTTP if SSH is not enabled or ssh_info doesn't look right.
self._review_url = http_url
else:
host, port = info.split()
self._review_url = self._SshReviewUrl(userEmail, host, port)
except urllib.error.HTTPError as e:
raise UploadError('%s: %s' % (self.review, str(e)))
except urllib.error.URLError as e:
raise UploadError('%s: %s' % (self.review, str(e)))
except HTTPException as e:
raise UploadError('%s: %s' % (self.review, e.__class__.__name__))
REVIEW_CACHE[u] = self._review_url
return self._review_url + self.projectname
def _SshReviewUrl(self, userEmail, host, port):
username = self._config.GetString('review.%s.username' % self.review)
if username is None:
username = userEmail.split('@')[0]
return 'ssh://%s@%s:%s/' % (username, host, port)
def ToLocal(self, rev):
"""Convert a remote revision string to something we have locally.
"""
if self.name == '.' or IsId(rev):
return rev
if not rev.startswith('refs/'):
rev = R_HEADS + rev
for spec in self.fetch:
if spec.SourceMatches(rev):
return spec.MapSource(rev)
if not rev.startswith(R_HEADS):
return rev
raise GitError('remote %s does not have %s' % (self.name, rev))
def WritesTo(self, ref):
"""True if the remote stores to the tracking ref.
"""
for spec in self.fetch:
if spec.DestMatches(ref):
return True
return False
def ResetFetch(self, mirror=False):
"""Set the fetch refspec to its default value.
"""
if mirror:
dst = 'refs/heads/*'
else:
dst = 'refs/remotes/%s/*' % self.name
self.fetch = [RefSpec(True, 'refs/heads/*', dst)]
def Save(self):
"""Save this remote to the configuration.
"""
self._Set('url', self.url)
if self.pushUrl is not None:
self._Set('pushurl', self.pushUrl + '/' + self.projectname)
else:
self._Set('pushurl', self.pushUrl)
self._Set('review', self.review)
self._Set('projectname', self.projectname)
self._Set('fetch', list(map(str, self.fetch)))
def _Set(self, key, value):
key = 'remote.%s.%s' % (self.name, key)
return self._config.SetString(key, value)
def _Get(self, key, all_keys=False):
key = 'remote.%s.%s' % (self.name, key)
return self._config.GetString(key, all_keys = all_keys)
class Branch(object):
"""Configuration options related to a single branch.
"""
def __init__(self, config, name):
self._config = config
self.name = name
self.merge = self._Get('merge')
r = self._Get('remote')
if r:
self.remote = self._config.GetRemote(r)
else:
self.remote = None
@property
def LocalMerge(self):
"""Convert the merge spec to a local name.
"""
if self.remote and self.merge:
return self.remote.ToLocal(self.merge)
return None
def Save(self):
"""Save this branch back into the configuration.
"""
if self._config.HasSection('branch', self.name):
if self.remote:
self._Set('remote', self.remote.name)
else:
self._Set('remote', None)
self._Set('merge', self.merge)
else:
fd = open(self._config.file, 'a')
try:
fd.write('[branch "%s"]\n' % self.name)
if self.remote:
fd.write('\tremote = %s\n' % self.remote.name)
if self.merge:
fd.write('\tmerge = %s\n' % self.merge)
finally:
fd.close()
def _Set(self, key, value):
key = 'branch.%s.%s' % (self.name, key)
return self._config.SetString(key, value)
def _Get(self, key, all_keys=False):
key = 'branch.%s.%s' % (self.name, key)
return self._config.GetString(key, all_keys = all_keys)