1
# Copyright (C) 2005 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
# Author: Martin Pool <mbp@canonical.com>
22
"""Store and retrieve weaves in files.
24
There is one format marker followed by a blank line, followed by a
25
series of version headers, followed by the weave itself.
27
Each version marker has
29
'i' parent version indexes
33
The inclusions do not need to list versions included by a parent.
35
The weave is bracketed by 'w' and 'W' lines, and includes the '{}[]'
36
processing instructions. Lines of text are prefixed by '.' if the
37
line contains a newline, or ',' if not.
40
# TODO: When extracting a single version it'd be enough to just pass
41
# an iterator returning the weave lines... We don't really need to
42
# deserialize it into memory.
44
FORMAT_1 = '# bzr weave file v5\n'
47
def write_weave(weave, f, format=None):
48
if format is None or format == 1:
49
return write_weave_v5(weave, f)
51
raise ValueError("unknown weave format %r" % format)
54
def write_weave_v5(weave, f):
55
"""Write weave to file f."""
58
for version, included in enumerate(weave._parents):
60
# mininc = weave.minimal_parents(version)
68
print >>f, '1', weave._sha1s[version]
69
print >>f, 'n', weave._names[version]
74
for l in weave._weave:
75
if isinstance(l, tuple):
80
print >>f, '%s %d' % l
85
assert l.find('\n', 0, -1) == -1
88
assert l.find('\n') == -1
96
# FIXME: detect the weave type and dispatch
97
from bzrlib.trace import mutter
98
from weave import Weave
99
w = Weave(getattr(f, 'name', None))
104
def _read_weave_v5(f, w):
105
"""Private helper routine to read a weave format 5 file into memory.
107
This is only to be used by read_weave and WeaveFile.__init__.
109
# 200 0 2075.5080 1084.0360 bzrlib.weavefile:104(_read_weave_v5)
110
# +60412 0 366.5900 366.5900 +<method 'readline' of 'file' objects>
111
# +59982 0 320.5280 320.5280 +<method 'startswith' of 'str' objects>
112
# +59363 0 297.8080 297.8080 +<method 'append' of 'list' objects>
113
# replace readline call with iter over all lines ->
114
# safe because we already suck on memory.
115
# 200 0 1492.7170 802.6220 bzrlib.weavefile:104(_read_weave_v5)
116
# +59982 0 329.9100 329.9100 +<method 'startswith' of 'str' objects>
117
# +59363 0 320.2980 320.2980 +<method 'append' of 'list' objects>
118
# replaced startswith with slice lookups:
119
# 200 0 851.7250 501.1120 bzrlib.weavefile:104(_read_weave_v5)
120
# +59363 0 311.8780 311.8780 +<method 'append' of 'list' objects>
121
# +200 0 30.2500 30.2500 +<method 'readlines' of 'file' objects>
123
from weave import WeaveFormatError
125
lines = iter(f.readlines())
129
except StopIteration:
130
raise WeaveFormatError('invalid weave file: no header')
133
raise WeaveFormatError('invalid weave file header: %r' % l)
141
w._parents.append(map(int, l[2:].split(' ')))
143
w._parents.append([])
145
l = lines.next()[:-1]
146
assert '1 ' == l[0:2]
147
w._sha1s.append(l[2:])
150
assert 'n ' == l[0:2]
152
assert name not in w._name_map
153
w._names.append(name)
154
w._name_map[name] = ver
163
raise WeaveFormatError('unexpected line %r' % l)
171
w._weave.append(l[2:]) # include newline
173
w._weave.append(l[2:-1]) # exclude newline
175
w._weave.append(('}', None))
177
assert l[0] in '{[]', l
178
assert l[1] == ' ', l
179
w._weave.append((intern(l[0]), int(l[2:])))
added
removed
bzrlib/weavefile.py
