3
# Copyright (C) 2005 Canonical Ltd
5
# This program is free software; you can redistribute it and/or modify
6
# it under the terms of the GNU General Public License as published by
7
# the Free Software Foundation; either version 2 of the License, or
8
# (at your option) any later version.
10
# This program is distributed in the hope that it will be useful,
11
# but WITHOUT ANY WARRANTY; without even the implied warranty of
12
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13
# GNU General Public License for more details.
15
# You should have received a copy of the GNU General Public License
16
# along with this program; if not, write to the Free Software
17
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19
# Author: Martin Pool <mbp@canonical.com>
25
from bzrlib.weavefile import read_weave, write_weave_v5
26
from bzrlib.weave import Weave
27
from bzrlib.atomicfile import AtomicFile
30
class WeaveStore(object):
31
"""Collection of several weave files."""
32
def __init__(self, dir):
36
def filename(self, file_id):
37
return self._dir + os.sep + file_id + '.weave'
40
def get_weave(self, file_id):
41
return read_weave(file(self.filename(file_id), 'rb'))
44
def get_weave_or_empty(self, file_id):
45
"""Return a weave, or an empty one if it doesn't exist."""
47
inf = file(self.filename(file_id), 'rb')
49
if e.errno == errno.ENOENT:
54
return read_weave(inf)
57
def put_weave(self, file_id, weave):
58
"""Write back a modified weave"""
59
weave_fn = self.filename(file_id)
60
af = AtomicFile(weave_fn)
62
write_weave_v5(weave, af)
68
def add_text(self, file_id, rev_id, new_lines, parents):
69
w = self.get_weave_or_empty(file_id)
70
parent_idxs = map(w.lookup, parents)
71
w.add(rev_id, parent_idxs, new_lines)
72
self.put_weave(file_id, w)