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
|
# Copyright (C) 2006-2010 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
"""RevisionTree - a Tree implementation backed by repository data for a revision."""
from io import BytesIO
from . import (
lock,
revision,
tree,
)
class RevisionTree(tree.Tree):
"""Tree viewing a previous revision.
File text can be retrieved from the text store.
"""
def __init__(self, repository, revision_id):
self._repository = repository
self._revision_id = revision_id
self._rules_searcher = None
def has_versioned_directories(self):
"""See `Tree.has_versioned_directories`."""
return self._repository._format.supports_versioned_directories
def supports_tree_reference(self):
return getattr(self._repository._format, "supports_tree_reference",
False)
def get_parent_ids(self):
"""See Tree.get_parent_ids.
A RevisionTree's parents match the revision graph.
"""
if self._revision_id in (None, revision.NULL_REVISION):
parent_ids = []
else:
parent_ids = self._repository.get_revision(
self._revision_id).parent_ids
return parent_ids
def get_revision_id(self):
"""Return the revision id associated with this tree."""
return self._revision_id
def get_file_revision(self, path):
"""Return the revision id in which a file was last changed."""
raise NotImplementedError(self.get_file_revision)
def get_file_text(self, path):
for (identifier, content) in self.iter_files_bytes([(path, None)]):
ret = b"".join(content)
return ret
def get_file(self, path):
return BytesIO(self.get_file_text(path))
def is_locked(self):
return self._repository.is_locked()
def lock_read(self):
self._repository.lock_read()
return lock.LogicalLockResult(self.unlock)
def __repr__(self):
return '<%s instance at %x, rev_id=%r>' % (
self.__class__.__name__, id(self), self._revision_id)
def unlock(self):
self._repository.unlock()
def _get_rules_searcher(self, default_searcher):
"""See Tree._get_rules_searcher."""
if self._rules_searcher is None:
self._rules_searcher = super(RevisionTree,
self)._get_rules_searcher(default_searcher)
return self._rules_searcher
|