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# Copyright (C) 2007 Canonical Ltd
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
"""An adapter between a Git control dir and a Bazaar BzrDir"""
import os
import bzrlib
from bzrlib.lazy_import import lazy_import
from bzrlib import (
bzrdir,
lockable_files,
urlutils,
)
lazy_import(globals(), """
from bzrlib.lockable_files import TransportLock
from bzrlib.plugins.git import (
errors,
branch,
repository,
workingtree,
)
""")
class GitLock(object):
"""A lock that thunks through to Git."""
def lock_write(self, token=None):
pass
def lock_read(self):
pass
def unlock(self):
pass
def peek(self):
pass
def validate_token(self, token):
pass
class GitLockableFiles(lockable_files.LockableFiles):
"""Git specific lockable files abstraction."""
def __init__(self, transport, lock):
self._lock = lock
self._transaction = None
self._lock_mode = None
self._lock_count = 0
self._transport = transport
class GitDir(bzrdir.BzrDir):
"""An adapter to the '.git' dir used by git."""
_gitrepository_class = repository.GitRepository
def __init__(self, transport, lockfiles, gitrepo, format):
self._format = format
self.root_transport = transport
self._git = gitrepo
if gitrepo.bare:
self.transport = transport
else:
self.transport = transport.clone('.git')
self._lockfiles = lockfiles
def get_branch_transport(self, branch_format):
if branch_format is None:
return self.transport
if isinstance(branch_format, GitBzrDirFormat):
return self.transport
raise errors.bzr_errors.IncompatibleFormat(branch_format, self._format)
get_repository_transport = get_branch_transport
get_workingtree_transport = get_branch_transport
def is_supported(self):
return True
def open_branch(self, ignored=None):
"""'create' a branch for this dir."""
repo = self.open_repository()
if repo._git.heads == []:
head = None
else:
head = repo._git.head()
return branch.GitBranch(self, repo, head,
self.root_transport.base, self._lockfiles)
def open_repository(self, shared=False):
"""'open' a repository for this dir."""
return self._gitrepository_class(self, self._lockfiles)
def open_workingtree(self, recommend_upgrade=True):
if self._git.bare:
loc = urlutils.unescape_for_display(self.root_transport.base, 'ascii')
raise errors.bzr_errors.NoWorkingTree(loc)
else:
return workingtree.GitWorkingTree(self, self.open_repository(),
self.open_branch())
def cloning_metadir(self, stacked=False):
if stacked:
return bzrlib.bzrdir.format_registry.make_bzrdir("pack-0.92")
else:
return bzrlib.bzrdir.format_registry.make_bzrdir("1.6")
def create_repository(self, shared=False):
return self.open_repository()
class GitBzrDirFormat(bzrdir.BzrDirFormat):
"""The .git directory control format."""
_gitdir_class = GitDir
_lock_class = TransportLock
@classmethod
def _known_formats(self):
return set([GitBzrDirFormat()])
def open(self, transport, _found=None):
"""Open this directory.
"""
from bzrlib.plugins.git import git
# we dont grok readonly - git isn't integrated with transport.
url = transport.base
if url.startswith('readonly+'):
url = url[len('readonly+'):]
try:
gitrepo = git.repo.Repo(transport.local_abspath("."))
except errors.bzr_errors.NotLocalUrl:
raise errors.bzr_errors.NotBranchError(path=transport.base)
lockfiles = GitLockableFiles(transport, GitLock())
return self._gitdir_class(transport, lockfiles, gitrepo, self)
@classmethod
def probe_transport(klass, transport):
"""Our format is present if the transport ends in '.not/'."""
# little ugly, but works
format = klass()
# delegate to the main opening code. This pays a double rtt cost at the
# moment, so perhaps we want probe_transport to return the opened thing
# rather than an openener ? or we could return a curried thing with the
# dir to open already instantiated ? Needs more thought.
try:
format.open(transport)
return format
except Exception, e:
raise errors.bzr_errors.NotBranchError(path=transport.base)
raise errors.bzr_errors.NotBranchError(path=transport.base)
def get_format_description(self):
return "Local Git Repository"
def get_format_string(self):
return "Local Git Repository"
def initialize_on_transport(self, transport):
from bzrlib.transport.local import LocalTransport
from bzrlib.plugins.git import git
if not isinstance(transport, LocalTransport):
raise NotImplementedError(self.initialize,
"Can't create Git Repositories/branches on "
"non-local transports")
git.repo.Repo.create(transport.local_abspath("."))
return self.open(transport)
def is_supported(self):
return True
bzrdir.BzrDirFormat.register_control_format(GitBzrDirFormat)
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