1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
|
# Copyright (C) 2006-2012 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
"""Full history branch formats."""
from __future__ import absolute_import
from bzrlib import (
debug,
errors,
revision as _mod_revision,
)
from bzrlib.branch import (
Branch,
BranchFormatMetadir,
BzrBranch,
)
from bzrlib.decorators import (
needs_write_lock,
)
from bzrlib.trace import mutter_callsite
class FullHistoryBzrBranch(BzrBranch):
"""Bzr branch which contains the full revision history."""
@needs_write_lock
def set_last_revision_info(self, revno, revision_id):
if not revision_id or not isinstance(revision_id, basestring):
raise errors.InvalidRevisionId(revision_id=revision_id, branch=self)
revision_id = _mod_revision.ensure_null(revision_id)
# this old format stores the full history, but this api doesn't
# provide it, so we must generate, and might as well check it's
# correct
history = self._lefthand_history(revision_id)
if len(history) != revno:
raise AssertionError('%d != %d' % (len(history), revno))
self._set_revision_history(history)
def _read_last_revision_info(self):
rh = self._revision_history()
revno = len(rh)
if revno:
return (revno, rh[-1])
else:
return (0, _mod_revision.NULL_REVISION)
def _set_revision_history(self, rev_history):
if 'evil' in debug.debug_flags:
mutter_callsite(3, "set_revision_history scales with history.")
check_not_reserved_id = _mod_revision.check_not_reserved_id
for rev_id in rev_history:
check_not_reserved_id(rev_id)
if Branch.hooks['post_change_branch_tip']:
# Don't calculate the last_revision_info() if there are no hooks
# that will use it.
old_revno, old_revid = self.last_revision_info()
if len(rev_history) == 0:
revid = _mod_revision.NULL_REVISION
else:
revid = rev_history[-1]
self._run_pre_change_branch_tip_hooks(len(rev_history), revid)
self._write_revision_history(rev_history)
self._clear_cached_state()
self._cache_revision_history(rev_history)
if Branch.hooks['post_change_branch_tip']:
self._run_post_change_branch_tip_hooks(old_revno, old_revid)
def _write_revision_history(self, history):
"""Factored out of set_revision_history.
This performs the actual writing to disk.
It is intended to be called by set_revision_history."""
self._transport.put_bytes(
'revision-history', '\n'.join(history),
mode=self.bzrdir._get_file_mode())
def _gen_revision_history(self):
history = self._transport.get_bytes('revision-history').split('\n')
if history[-1:] == ['']:
# There shouldn't be a trailing newline, but just in case.
history.pop()
return history
def _synchronize_history(self, destination, revision_id):
if not isinstance(destination, FullHistoryBzrBranch):
super(BzrBranch, self)._synchronize_history(
destination, revision_id)
return
if revision_id == _mod_revision.NULL_REVISION:
new_history = []
else:
new_history = self._revision_history()
if revision_id is not None and new_history != []:
try:
new_history = new_history[:new_history.index(revision_id) + 1]
except ValueError:
rev = self.repository.get_revision(revision_id)
new_history = rev.get_history(self.repository)[1:]
destination._set_revision_history(new_history)
@needs_write_lock
def generate_revision_history(self, revision_id, last_rev=None,
other_branch=None):
"""Create a new revision history that will finish with revision_id.
:param revision_id: the new tip to use.
:param last_rev: The previous last_revision. If not None, then this
must be a ancestory of revision_id, or DivergedBranches is raised.
:param other_branch: The other branch that DivergedBranches should
raise with respect to.
"""
self._set_revision_history(self._lefthand_history(revision_id,
last_rev, other_branch))
class BzrBranch5(FullHistoryBzrBranch):
"""A format 5 branch. This supports new features over plain branches.
It has support for a master_branch which is the data for bound branches.
"""
class BzrBranchFormat5(BranchFormatMetadir):
"""Bzr branch format 5.
This format has:
- a revision-history file.
- a format string
- a lock dir guarding the branch itself
- all of this stored in a branch/ subdirectory
- works with shared repositories.
This format is new in bzr 0.8.
"""
def _branch_class(self):
return BzrBranch5
@classmethod
def get_format_string(cls):
"""See BranchFormat.get_format_string()."""
return "Bazaar-NG branch format 5\n"
def get_format_description(self):
"""See BranchFormat.get_format_description()."""
return "Branch format 5"
def initialize(self, a_bzrdir, name=None, repository=None,
append_revisions_only=None):
"""Create a branch of this format in a_bzrdir."""
if append_revisions_only:
raise errors.UpgradeRequired(a_bzrdir.user_url)
utf8_files = [('revision-history', ''),
('branch-name', ''),
]
return self._initialize_helper(a_bzrdir, utf8_files, name, repository)
def supports_tags(self):
return False
|