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Viewing changes to bzrlib/plugins/weave_fmt/branch.py

  • Committer: Canonical.com Patch Queue Manager
  • Date: 2010-05-21 13:36:51 UTC
  • mfrom: (5243.2.1 readdir_cleanup)
  • Revision ID: pqm@pqm.ubuntu.com-20100521133651-p62dndo2giy5ls21
(lifeless) Some cleanups to the readdir pyrex code for a little efficiency
 and to avoid compile warnings. (John A Meinel)

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bzrlib/plugins/weave_fmt/branch.py
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# Copyright (C) 2010 Canonical Ltd
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
11
 
# GNU General Public License for more details.
12
 
#
13
 
# You should have received a copy of the GNU General Public License
14
 
# along with this program; if not, write to the Free Software
15
 
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
16
 
 
17
 
"""Weave-era branch implementations."""
18
 
 
19
 
from __future__ import absolute_import
20
 
 
21
 
from bzrlib import (
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    errors,
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    lockable_files,
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    )
25
 
 
26
 
from bzrlib.trace import mutter
27
 
 
28
 
from bzrlib.branch import (
29
 
    BranchFormat,
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    FullHistoryBzrBranch,
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    )
32
 
 
33
 
 
34
 
class BzrBranch4(FullHistoryBzrBranch):
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    """Branch format 4."""
36
 
 
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    def _get_checkout_format(self, lightweight=False):
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        """Return the most suitable metadir for a checkout of this branch.
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        """
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        from bzrlib.plugins.weave_fmt.repository import RepositoryFormat7
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        from bzrlib.bzrdir import BzrDirMetaFormat1
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        format = BzrDirMetaFormat1()
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        if lightweight:
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            format.set_branch_format(self._format)
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            format.repository_format = self.bzrdir._format.repository_format
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        else:
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            format.repository_format = RepositoryFormat7()
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        return format
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    def unbind(self):
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        raise errors.UpgradeRequired(self.user_url)
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    def bind(self, other):
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        raise errors.UpgradeRequired(self.user_url)
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    def set_bound_location(self, location):
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        raise NotImplementedError(self.set_bound_location)
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    def get_bound_location(self):
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        return None
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    def update(self):
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        return None
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    def get_master_branch(self, possible_transports=None):
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        return None
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class BzrBranchFormat4(BranchFormat):
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    """Bzr branch format 4.
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    This format has:
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     - a revision-history file.
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     - a branch-lock lock file [ to be shared with the bzrdir ]
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    It does not support binding.
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    """
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    def initialize(self, a_bzrdir, name=None, repository=None,
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                   append_revisions_only=None):
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        """Create a branch of this format in a_bzrdir.
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        :param a_bzrdir: The bzrdir to initialize the branch in
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        :param name: Name of colocated branch to create, if any
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        :param repository: Repository for this branch (unused)
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        """
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        if append_revisions_only:
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            raise errors.UpgradeRequired(a_bzrdir.user_url)
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        if repository is not None:
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            raise NotImplementedError(
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                "initialize(repository=<not None>) on %r" % (self,))
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        if not [isinstance(a_bzrdir._format, format) for format in
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                self._compatible_bzrdirs]:
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            raise errors.IncompatibleFormat(self, a_bzrdir._format)
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        utf8_files = [('revision-history', ''),
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                      ('branch-name', ''),
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                      ]
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        mutter('creating branch %r in %s', self, a_bzrdir.user_url)
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        branch_transport = a_bzrdir.get_branch_transport(self, name=name)
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        control_files = lockable_files.LockableFiles(branch_transport,
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            'branch-lock', lockable_files.TransportLock)
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        control_files.create_lock()
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        try:
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            control_files.lock_write()
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        except errors.LockContention:
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            lock_taken = False
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        else:
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            lock_taken = True
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        try:
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            for (filename, content) in utf8_files:
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                branch_transport.put_bytes(
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                    filename, content,
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                    mode=a_bzrdir._get_file_mode())
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        finally:
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            if lock_taken:
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                control_files.unlock()
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        branch = self.open(a_bzrdir, name, _found=True,
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                found_repository=None)
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        self._run_post_branch_init_hooks(a_bzrdir, name, branch)
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        return branch
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    def __init__(self):
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        super(BzrBranchFormat4, self).__init__()
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        from bzrlib.plugins.weave_fmt.bzrdir import (
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            BzrDirFormat4, BzrDirFormat5, BzrDirFormat6,
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            )
127
 
        self._matchingbzrdir = BzrDirFormat6()
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        self._compatible_bzrdirs = [BzrDirFormat4, BzrDirFormat5,
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            BzrDirFormat6]
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    def network_name(self):
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        """The network name for this format is the control dirs disk label."""
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        return self._matchingbzrdir.get_format_string()
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    def get_format_description(self):
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        return "Branch format 4"
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    def open(self, a_bzrdir, name=None, _found=False, ignore_fallbacks=False,
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            found_repository=None, possible_transports=None):
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        """See BranchFormat.open()."""
141
 
        if name is not None:
142
 
            raise errors.NoColocatedBranchSupport(self)
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        if not _found:
144
 
            # we are being called directly and must probe.
145
 
            raise NotImplementedError
146
 
        if found_repository is None:
147
 
            found_repository = a_bzrdir.open_repository()
148
 
        return BzrBranch4(_format=self,
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                         _control_files=a_bzrdir._control_files,
150
 
                         a_bzrdir=a_bzrdir,
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                         name=name,
152
 
                         _repository=found_repository,
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                         possible_transports=possible_transports)
154
 
 
155
 
    def __str__(self):
156
 
        return "Bazaar-NG branch format 4"
157
 
 
158
 
    def supports_leaving_lock(self):
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        return False