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

  • Committer: Jelmer Vernooij
  • Date: 2018-07-08 14:45:27 UTC
  • mto: This revision was merged to the branch mainline in revision 7036.
  • Revision ID: jelmer@jelmer.uk-20180708144527-codhlvdcdg9y0nji
Fix a bunch of merge tests.

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breezy/plugins/weave_fmt/branch.py
 
1
# Copyright (C) 2010 Canonical Ltd
 
2
#
 
3
# This program is free software; you can redistribute it and/or modify
 
4
# it under the terms of the GNU General Public License as published by
 
5
# the Free Software Foundation; either version 2 of the License, or
 
6
# (at your option) any later version.
 
7
#
 
8
# This program is distributed in the hope that it will be useful,
 
9
# but WITHOUT ANY WARRANTY; without even the implied warranty of
 
10
# 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 ... import (
 
22
    errors,
 
23
    lockable_files,
 
24
    )
 
25
 
 
26
from ...decorators import (
 
27
    only_raises,
 
28
    )
 
29
from ...lock import LogicalLockResult
 
30
from ...trace import mutter
 
31
 
 
32
from ...branch import (
 
33
    BranchFormat,
 
34
    BranchWriteLockResult,
 
35
    )
 
36
from ...bzr.fullhistory import (
 
37
    FullHistoryBzrBranch,
 
38
    )
 
39
 
 
40
 
 
41
class BzrBranch4(FullHistoryBzrBranch):
 
42
    """Branch format 4."""
 
43
 
 
44
    def lock_write(self, token=None):
 
45
        """Lock the branch for write operations.
 
46
 
 
47
        :param token: A token to permit reacquiring a previously held and
 
48
            preserved lock.
 
49
        :return: A BranchWriteLockResult.
 
50
        """
 
51
        if not self.is_locked():
 
52
            self._note_lock('w')
 
53
        # All-in-one needs to always unlock/lock.
 
54
        self.repository._warn_if_deprecated(self)
 
55
        self.repository.lock_write()
 
56
        try:
 
57
            return BranchWriteLockResult(self.unlock,
 
58
                self.control_files.lock_write(token=token))
 
59
        except:
 
60
            self.repository.unlock()
 
61
            raise
 
62
 
 
63
    def lock_read(self):
 
64
        """Lock the branch for read operations.
 
65
 
 
66
        :return: A breezy.lock.LogicalLockResult.
 
67
        """
 
68
        if not self.is_locked():
 
69
            self._note_lock('r')
 
70
        # All-in-one needs to always unlock/lock.
 
71
        self.repository._warn_if_deprecated(self)
 
72
        self.repository.lock_read()
 
73
        try:
 
74
            self.control_files.lock_read()
 
75
            return LogicalLockResult(self.unlock)
 
76
        except:
 
77
            self.repository.unlock()
 
78
            raise
 
79
 
 
80
    @only_raises(errors.LockNotHeld, errors.LockBroken)
 
81
    def unlock(self):
 
82
        if self.control_files._lock_count == 2 and self.conf_store is not None:
 
83
            self.conf_store.save_changes()
 
84
        try:
 
85
            self.control_files.unlock()
 
86
        finally:
 
87
            # All-in-one needs to always unlock/lock.
 
88
            self.repository.unlock()
 
89
            if not self.control_files.is_locked():
 
90
                # we just released the lock
 
91
                self._clear_cached_state()
 
92
 
 
93
    def _get_checkout_format(self, lightweight=False):
 
94
        """Return the most suitable metadir for a checkout of this branch.
 
95
        """
 
96
        from .repository import RepositoryFormat7
 
97
        from ...bzr.bzrdir import BzrDirMetaFormat1
 
98
        format = BzrDirMetaFormat1()
 
99
        if lightweight:
 
100
            format.set_branch_format(self._format)
 
101
            format.repository_format = self.controldir._format.repository_format
 
102
        else:
 
103
            format.repository_format = RepositoryFormat7()
 
104
        return format
 
105
 
 
106
    def unbind(self):
 
107
        raise errors.UpgradeRequired(self.user_url)
 
108
 
 
109
    def bind(self, other):
 
110
        raise errors.UpgradeRequired(self.user_url)
 
111
 
 
112
    def set_bound_location(self, location):
 
113
        raise NotImplementedError(self.set_bound_location)
 
114
 
 
115
    def get_bound_location(self):
 
116
        return None
 
117
 
 
118
    def update(self):
 
119
        return None
 
120
 
 
121
    def get_master_branch(self, possible_transports=None):
 
122
        return None
 
123
 
 
124
 
 
125
class BzrBranchFormat4(BranchFormat):
 
126
    """Bzr branch format 4.
 
127
 
 
128
    This format has:
 
129
     - a revision-history file.
 
130
     - a branch-lock lock file [ to be shared with the bzrdir ]
 
131
 
 
132
    It does not support binding.
 
133
    """
 
134
 
 
135
    def initialize(self, a_controldir, name=None, repository=None,
 
136
                   append_revisions_only=None):
 
137
        """Create a branch of this format in a_controldir.
 
138
 
 
139
        :param a_controldir: The bzrdir to initialize the branch in
 
140
        :param name: Name of colocated branch to create, if any
 
141
        :param repository: Repository for this branch (unused)
 
142
        """
 
143
        if append_revisions_only:
 
144
            raise errors.UpgradeRequired(a_controldir.user_url)
 
145
        if repository is not None:
 
146
            raise NotImplementedError(
 
147
                "initialize(repository=<not None>) on %r" % (self,))
 
148
        if not [isinstance(a_controldir._format, format) for format in
 
149
                self._compatible_bzrdirs]:
 
150
            raise errors.IncompatibleFormat(self, a_controldir._format)
 
151
        utf8_files = [('revision-history', b''),
 
152
                      ('branch-name', b''),
 
153
                      ]
 
154
        mutter('creating branch %r in %s', self, a_controldir.user_url)
 
155
        branch_transport = a_controldir.get_branch_transport(self, name=name)
 
156
        control_files = lockable_files.LockableFiles(branch_transport,
 
157
            'branch-lock', lockable_files.TransportLock)
 
158
        control_files.create_lock()
 
159
        try:
 
160
            control_files.lock_write()
 
161
        except errors.LockContention:
 
162
            lock_taken = False
 
163
        else:
 
164
            lock_taken = True
 
165
        try:
 
166
            for (filename, content) in utf8_files:
 
167
                branch_transport.put_bytes(
 
168
                    filename, content,
 
169
                    mode=a_controldir._get_file_mode())
 
170
        finally:
 
171
            if lock_taken:
 
172
                control_files.unlock()
 
173
        branch = self.open(a_controldir, name, _found=True,
 
174
                found_repository=None)
 
175
        self._run_post_branch_init_hooks(a_controldir, name, branch)
 
176
        return branch
 
177
 
 
178
    def __init__(self):
 
179
        super(BzrBranchFormat4, self).__init__()
 
180
        from .bzrdir import (
 
181
            BzrDirFormat4, BzrDirFormat5, BzrDirFormat6,
 
182
            )
 
183
        self._matchingcontroldir = BzrDirFormat6()
 
184
        self._compatible_bzrdirs = [BzrDirFormat4, BzrDirFormat5,
 
185
            BzrDirFormat6]
 
186
 
 
187
    def network_name(self):
 
188
        """The network name for this format is the control dirs disk label."""
 
189
        return self._matchingcontroldir.get_format_string()
 
190
 
 
191
    def get_format_description(self):
 
192
        return "Branch format 4"
 
193
 
 
194
    def open(self, a_controldir, name=None, _found=False, ignore_fallbacks=False,
 
195
            found_repository=None, possible_transports=None):
 
196
        """See BranchFormat.open()."""
 
197
        if name is None:
 
198
            name = a_controldir._get_selected_branch()
 
199
        if name != "":
 
200
            raise errors.NoColocatedBranchSupport(self)
 
201
        if not _found:
 
202
            # we are being called directly and must probe.
 
203
            raise NotImplementedError
 
204
        if found_repository is None:
 
205
            found_repository = a_controldir.open_repository()
 
206
        return BzrBranch4(_format=self,
 
207
                         _control_files=a_controldir._control_files,
 
208
                         a_controldir=a_controldir,
 
209
                         name=name,
 
210
                         _repository=found_repository,
 
211
                         possible_transports=possible_transports)
 
212
 
 
213
    def __str__(self):
 
214
        return "Bazaar-NG branch format 4"
 
215
 
 
216
    def supports_leaving_lock(self):
 
217
        return False