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# Copyright (C) 2007 Canonical Ltd
# Copyright (C) 2010 Jelmer Vernooij
#
# 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."""
from bzrlib import (
bzrdir,
errors as bzr_errors,
lockable_files,
urlutils,
version_info as bzrlib_version,
)
LockWarner = getattr(lockable_files, "_LockWarner", None)
from bzrlib.plugins.git import (
LocalGitBzrDirFormat,
)
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
def break_lock(self):
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._transport = transport
if LockWarner is None:
# Bzr 1.13
self._lock_count = 0
else:
self._lock_warner = LockWarner(repr(self))
class GitDir(bzrdir.BzrDir):
"""An adapter to the '.git' dir used by git."""
def is_supported(self):
return True
def cloning_metadir(self, stacked=False):
return bzrdir.format_registry.make_bzrdir("default")
def _branch_name_to_ref(self, name):
raise NotImplementedError(self._branch_name_to_ref)
if bzrlib_version >= (2, 2):
def open_branch(self, name=None, ignore_fallbacks=None,
unsupported=False):
return self._open_branch(name=name,
ignore_fallbacks=ignore_fallbacks, unsupported=unsupported)
else:
def open_branch(self, ignore_fallbacks=None, unsupported=False):
return self._open_branch(name=None,
ignore_fallbacks=ignore_fallbacks, unsupported=unsupported)
class LocalGitDir(GitDir):
"""An adapter to the '.git' dir used by git."""
def _get_gitrepository_class(self):
from bzrlib.plugins.git.repository import LocalGitRepository
return LocalGitRepository
_gitrepository_class = property(_get_gitrepository_class)
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
self._mode_check_done = None
def _branch_name_to_ref(self, name):
from bzrlib.plugins.git.refs import branch_name_to_ref
ref = branch_name_to_ref(name, None)
if ref == "HEAD":
from dulwich.repo import SYMREF
refcontents = self._git.refs.read_ref(ref)
if refcontents.startswith(SYMREF):
ref = refcontents[len(SYMREF):]
return ref
def is_control_filename(self, filename):
return filename == '.git' or filename.startswith('.git/')
def get_branch_transport(self, branch_format, name):
if branch_format is None:
return self.transport
if isinstance(branch_format, LocalGitBzrDirFormat):
return self.transport
raise bzr_errors.IncompatibleFormat(branch_format, self._format)
def get_repository_transport(self, format):
if format is None:
return self.transport
if isinstance(format, LocalGitBzrDirFormat):
return self.transport
raise bzr_errors.IncompatibleFormat(format, self._format)
def get_workingtree_transport(self, format):
if format is None:
return self.transport
if isinstance(format, LocalGitBzrDirFormat):
return self.transport
raise bzr_errors.IncompatibleFormat(format, self._format)
def _open_branch(self, name=None, ignore_fallbacks=None, unsupported=False):
"""'create' a branch for this dir."""
repo = self.open_repository()
from bzrlib.plugins.git.branch import LocalGitBranch
return LocalGitBranch(self, repo, self._branch_name_to_ref(name),
self._lockfiles)
def destroy_branch(self, name=None):
del self._git.refs[self._branch_name_to_ref(name)]
def list_branches(self):
ret = []
for name in self._git.get_refs():
if name.startswith("refs/heads/"):
ret.append(self.open_branch(name=name))
return ret
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 not self._git.bare:
from dulwich.errors import NoIndexPresent
repo = self.open_repository()
try:
index = repo._git.open_index()
except NoIndexPresent:
pass
else:
from bzrlib.plugins.git.workingtree import GitWorkingTree
try:
branch = self.open_branch()
except bzr_errors.NotBranchError:
pass
else:
return GitWorkingTree(self, repo, branch, index)
loc = urlutils.unescape_for_display(self.root_transport.base, 'ascii')
raise bzr_errors.NoWorkingTree(loc)
def create_repository(self, shared=False):
return self.open_repository()
def create_branch(self, name=None):
refname = self._branch_name_to_ref(name)
from dulwich.protocol import ZERO_SHA
self._git.refs[refname or "HEAD"] = ZERO_SHA
return self.open_branch(name)
def backup_bzrdir(self):
if self._git.bare:
self.root_transport.copy_tree(".git", ".git.backup")
return (self.root_transport.abspath(".git"),
self.root_transport.abspath(".git.backup"))
else:
raise bzr_errors.BzrError("Unable to backup bare repositories")
def create_workingtree(self, revision_id=None, from_branch=None,
accelerator_tree=None, hardlink=False):
if self._git.bare:
raise bzr_errors.BzrError("Can't create working tree in a bare repo")
from dulwich.index import write_index
from dulwich.pack import SHA1Writer
f = open(self.transport.local_abspath("index"), 'w+')
try:
f = SHA1Writer(f)
write_index(f, [])
finally:
f.close()
return self.open_workingtree()
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