| # |
| # 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. |
| |
| import cPickle |
| import os |
| import re |
| import subprocess |
| import sys |
| try: |
| import threading as _threading |
| except ImportError: |
| import dummy_threading as _threading |
| import time |
| import urllib2 |
| |
| from signal import SIGTERM |
| from error import GitError, UploadError |
| from trace import Trace |
| |
| 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('^[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(file = os.path.expanduser('~/.gitconfig')) |
| return cls._ForUser |
| |
| @classmethod |
| def ForRepository(cls, gitdir, defaults=None): |
| return cls(file = os.path.join(gitdir, 'config'), |
| defaults = defaults) |
| |
| def __init__(self, file, defaults=None, pickleFile=None): |
| self.file = file |
| self.defaults = defaults |
| self._cache_dict = None |
| self._section_dict = None |
| self._remotes = {} |
| self._branches = {} |
| |
| if pickleFile is None: |
| self._pickle = os.path.join( |
| os.path.dirname(self.file), |
| '.repopickle_' + os.path.basename(self.file)) |
| else: |
| self._pickle = pickleFile |
| |
| 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=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 = True then the defaults are also searched. |
| """ |
| try: |
| v = self._cache[_key(name)] |
| except KeyError: |
| if self.defaults: |
| return self.defaults.GetString(name, all = all) |
| v = [] |
| |
| if not all: |
| if v: |
| return v[0] |
| return None |
| |
| r = [] |
| r.extend(v) |
| if self.defaults: |
| r.extend(self.defaults.GetString(name, all = 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 xrange(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'): |
| old_url = self.GetString('url.%s.insteadof' % new_url) |
| 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._ReadPickle() |
| if d is None: |
| d = self._ReadGit() |
| self._SavePickle(d) |
| return d |
| |
| def _ReadPickle(self): |
| try: |
| if os.path.getmtime(self._pickle) \ |
| <= os.path.getmtime(self.file): |
| os.remove(self._pickle) |
| return None |
| except OSError: |
| return None |
| try: |
| Trace(': unpickle %s', self.file) |
| fd = open(self._pickle, 'rb') |
| try: |
| return cPickle.load(fd) |
| finally: |
| fd.close() |
| except EOFError: |
| os.remove(self._pickle) |
| return None |
| except IOError: |
| os.remove(self._pickle) |
| return None |
| except cPickle.PickleError: |
| os.remove(self._pickle) |
| return None |
| |
| def _SavePickle(self, cache): |
| try: |
| fd = open(self._pickle, 'wb') |
| try: |
| cPickle.dump(cache, fd, cPickle.HIGHEST_PROTOCOL) |
| finally: |
| fd.close() |
| except IOError: |
| if os.path.exists(self._pickle): |
| os.remove(self._pickle) |
| except cPickle.PickleError: |
| if os.path.exists(self._pickle): |
| os.remove(self._pickle) |
| |
| 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.rstrip('\0').split('\0'): |
| 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, e: |
| _ssh_master = False |
| print >>sys.stderr, \ |
| '\nwarn: cannot enable ssh control master for %s:%s\n%s' \ |
| % (host,port, str(e)) |
| return False |
| |
| _master_processes.append(p) |
| _master_keys.add(key) |
| time.sleep(1) |
| 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 |
| |
| 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.review = self._Get('review') |
| self.projectname = self._Get('projectname') |
| self.fetch = map(lambda x: RefSpec.FromString(x), |
| self._Get('fetch', all=True)) |
| self._review_protocol = 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=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) |
| |
| @property |
| def ReviewProtocol(self): |
| if self._review_protocol is None: |
| if self.review is None: |
| return None |
| |
| u = self.review |
| if not u.startswith('http:') and not u.startswith('https:'): |
| u = 'http://%s' % u |
| if u.endswith('/Gerrit'): |
| u = u[:len(u) - len('/Gerrit')] |
| if not u.endswith('/ssh_info'): |
| if not u.endswith('/'): |
| u += '/' |
| u += 'ssh_info' |
| |
| if u in REVIEW_CACHE: |
| info = REVIEW_CACHE[u] |
| self._review_protocol = info[0] |
| self._review_host = info[1] |
| self._review_port = info[2] |
| else: |
| try: |
| info = urllib2.urlopen(u).read() |
| if info == 'NOT_AVAILABLE': |
| raise UploadError('%s: SSH disabled' % self.review) |
| if '<' in info: |
| # Assume the server gave us some sort of HTML |
| # response back, like maybe a login page. |
| # |
| raise UploadError('%s: Cannot parse response' % u) |
| |
| self._review_protocol = 'ssh' |
| self._review_host = info.split(" ")[0] |
| self._review_port = info.split(" ")[1] |
| except urllib2.HTTPError, e: |
| if e.code == 404: |
| self._review_protocol = 'http-post' |
| self._review_host = None |
| self._review_port = None |
| else: |
| raise UploadError('Upload over SSH unavailable') |
| except urllib2.URLError, e: |
| raise UploadError('%s: %s' % (self.review, str(e))) |
| |
| REVIEW_CACHE[u] = ( |
| self._review_protocol, |
| self._review_host, |
| self._review_port) |
| return self._review_protocol |
| |
| def SshReviewUrl(self, userEmail): |
| if self.ReviewProtocol != 'ssh': |
| return None |
| username = self._config.GetString('review.%s.username' % self.review) |
| if username is None: |
| username = userEmail.split("@")[0] |
| return 'ssh://%s@%s:%s/%s' % ( |
| username, |
| self._review_host, |
| self._review_port, |
| self.projectname) |
| |
| def ToLocal(self, rev): |
| """Convert a remote revision string to something we have locally. |
| """ |
| if IsId(rev): |
| return rev |
| if rev.startswith(R_TAGS): |
| return rev |
| |
| if not rev.startswith('refs/'): |
| rev = R_HEADS + rev |
| |
| for spec in self.fetch: |
| if spec.SourceMatches(rev): |
| return spec.MapSource(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) |
| self._Set('review', self.review) |
| self._Set('projectname', self.projectname) |
| self._Set('fetch', map(lambda x: str(x), 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=False): |
| key = 'remote.%s.%s' % (self.name, key) |
| return self._config.GetString(key, all = all) |
| |
| |
| 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, 'ab') |
| 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=False): |
| key = 'branch.%s.%s' % (self.name, key) |
| return self._config.GetString(key, all = all) |
