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# Copyright (C) 2010 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
"""Weave-era branch implementations."""
from bzrlib import (
errors,
lockable_files,
)
from bzrlib.trace import mutter
from bzrlib.branch import (
BranchFormat,
BzrBranch,
)
class PreSplitOutBzrBranch(BzrBranch):
def _get_checkout_format(self):
"""Return the most suitable metadir for a checkout of this branch.
"""
from bzrlib.repofmt.weaverepo import RepositoryFormat7
from bzrlib.bzrdir import BzrDirMetaFormat1
format = BzrDirMetaFormat1()
format.repository_format = RepositoryFormat7()
return format
class BzrBranchFormat4(BranchFormat):
"""Bzr branch format 4.
This format has:
- a revision-history file.
- a branch-lock lock file [ to be shared with the bzrdir ]
"""
def get_format_description(self):
"""See BranchFormat.get_format_description()."""
return "Branch format 4"
def _initialize_helper(self, a_bzrdir, utf8_files, name=None):
"""Initialize a branch in a bzrdir, with specified files
:param a_bzrdir: The bzrdir to initialize the branch in
:param utf8_files: The files to create as a list of
(filename, content) tuples
:param name: Name of colocated branch to create, if any
:return: a branch in this format
"""
mutter('creating branch %r in %s', self, a_bzrdir.user_url)
branch_transport = a_bzrdir.get_branch_transport(self, name=name)
control_files = lockable_files.LockableFiles(branch_transport,
'branch-lock', lockable_files.TransportLock)
control_files.create_lock()
try:
control_files.lock_write()
except errors.LockContention:
lock_taken = False
else:
lock_taken = True
try:
for (filename, content) in utf8_files:
branch_transport.put_bytes(
filename, content,
mode=a_bzrdir._get_file_mode())
finally:
if lock_taken:
control_files.unlock()
branch = self.open(a_bzrdir, name, _found=True,
found_repository=None)
self._run_post_branch_init_hooks(a_bzrdir, name, branch)
return branch
def initialize(self, a_bzrdir, name=None, repository=None):
"""Create a branch of this format in a_bzrdir."""
if repository is not None:
raise NotImplementedError(
"initialize(repository=<not None>) on %r" % (self,))
utf8_files = [('revision-history', ''),
('branch-name', ''),
]
return self._initialize_helper(a_bzrdir, utf8_files, name=name)
def __init__(self):
super(BzrBranchFormat4, self).__init__()
from bzrlib.bzrdir import BzrDirFormat6
self._matchingbzrdir = BzrDirFormat6()
def network_name(self):
"""The network name for this format is the control dirs disk label."""
return self._matchingbzrdir.get_format_string()
def open(self, a_bzrdir, name=None, _found=False, ignore_fallbacks=False,
found_repository=None):
"""See BranchFormat.open()."""
if not _found:
# we are being called directly and must probe.
raise NotImplementedError
if found_repository is None:
found_repository = a_bzrdir.open_repository()
return PreSplitOutBzrBranch(_format=self,
_control_files=a_bzrdir._control_files,
a_bzrdir=a_bzrdir,
name=name,
_repository=found_repository)
def __str__(self):
return "Bazaar-NG branch format 4"
def supports_leaving_lock(self):
return False
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