1
# Copyright (C) 2006 Canonical Ltd
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.
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.
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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
17
"""TreeBuilder helper class.
19
TreeBuilders are used to build trees of various shapres or properties. This
20
can be extremely useful in testing for instance.
23
from bzrlib import errors
26
class TreeBuilder(object):
27
"""A TreeBuilder allows the creation of specific content in one tree at a
32
"""Construct a TreeBuilder."""
34
self._root_done = False
36
def build(self, recipe):
37
"""Build recipe into the current tree.
39
:param recipe: A sequence of paths. For each path, the corresponding
40
path in the current tree is created and added. If the path ends in
41
'/' then a directory is added, otherwise a regular file is added.
43
self._ensure_building()
44
if not self._root_done:
45
self._tree.add('', 'root-id', 'directory')
46
self._root_done = True
49
self._tree.mkdir(name[:-1])
52
content = "contents of %s%s" % (name.encode('utf-8'), end)
53
self._tree.add(name, None, 'file')
54
file_id = self._tree.path2id(name)
55
self._tree.put_file_bytes_non_atomic(file_id, content)
57
def _ensure_building(self):
58
"""Raise NotBuilding if there is no current tree being built."""
59
if self._tree is None:
60
raise errors.NotBuilding
62
def finish_tree(self):
63
"""Finish building the current tree."""
64
self._ensure_building()
69
def start_tree(self, tree):
70
"""Start building on tree.
72
:param tree: A tree to start building on. It must provide the
73
MutableTree interface.
75
if self._tree is not None:
76
raise errors.AlreadyBuilding
78
self._tree.lock_tree_write()