« back to all changes in this revision
Viewing changes to bzrlib/weave.py
- browse files at revision 963
- compare with another revision
- download diff
- download tarball
- view history from revision 963
- Committer: Martin Pool
- Date: 2005-07-22 22:37:53 UTC
- Revision ID: mbp@sourcefrog.net-20050722223753-7dced4e32d3ce21d
- add the start of a test for inventory file-id matching
- files added:
- bzr-man.py
- bzrlib/selftest
- effbot
- effbot/org
- patches
- plugins
- plugins/changeset
- tools
- files removed:
- bzrlib/tests.py
- files renamed:
- contrib/bash/bzr => contrib/bash/bzr.simple
- files modified:
- .bzrignore
added
removed
bzrlib/weave.py
1
#! /usr/bin/python
2
3
# Copyright (C) 2005 Canonical Ltd
4
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.
9
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.
14
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
18
19
# Author: Martin Pool <mbp@canonical.com>
20
21
22
"""Weave - storage of related text file versions"""
23
24
# before intset (r923) 2000 versions in 41.5s
25
# with intset (r926) 2000 versions in 93s !!!
26
# better to just use plain sets.
27
28
# making _extract build and return a list, rather than being a generator
29
# takes 37.94s
30
31
# with python -O, r923 does 2000 versions in 36.87s
32
33
# with optimizations to avoid mutating lists - 35.75! I guess copying
34
# all the elements every time costs more than the small manipulations.
35
# a surprisingly small change.
36
37
# r931, which avoids using a generator for extract, does 36.98s
38
39
# with memoized inclusions, takes 41.49s; not very good
40
41
# with slots, takes 37.35s; without takes 39.16, a bit surprising
42
43
# with the delta calculation mixed in with the add method, rather than
44
# separated, takes 36.78s
45
46
# with delta folded in and mutation of the list, 36.13s
47
48
# with all this and simplification of add code, 33s
49
50
51
# TODO: Perhaps have copy method for Weave instances?
52
53
# XXX: If we do weaves this way, will a merge still behave the same
54
# way if it's done in a different order? That's a pretty desirable
55
# property.
56
57
# TODO: Nothing here so far assumes the lines are really \n newlines,
58
# rather than being split up in some other way. We could accomodate
59
# binaries, perhaps by naively splitting on \n or perhaps using
60
# something like a rolling checksum.
61
62
# TODO: Track version names as well as indexes.
63
64
# TODO: End marker for each version so we can stop reading?
65
66
# TODO: Check that no insertion occurs inside a deletion that was
67
# active in the version of the insertion.
68
69
# TODO: In addition to the SHA-1 check, perhaps have some code that
70
# checks structural constraints of the weave: ie that insertions are
71
# properly nested, that there is no text outside of an insertion, that
72
# insertions or deletions are not repeated, etc.
73
74
# TODO: Parallel-extract that passes back each line along with a
75
# description of which revisions include it. Nice for checking all
76
# shas in parallel.
77
78
79
80
81
class WeaveError(Exception):
82
"""Exception in processing weave"""
83
84
85
class WeaveFormatError(WeaveError):
86
"""Weave invariant violated"""
87
88
89
class Weave(object):
90
"""weave - versioned text file storage.
91
92
A Weave manages versions of line-based text files, keeping track
93
of the originating version for each line.
94
95
To clients the "lines" of the file are represented as a list of strings.
96
These strings will typically have terminal newline characters, but
97
this is not required. In particular files commonly do not have a newline
98
at the end of the file.
99
100
Texts can be identified in either of two ways:
101
102
* a nonnegative index number.
103
104
* a version-id string.
105
106
Typically the index number will be valid only inside this weave and
107
the version-id is used to reference it in the larger world.
108
109
The weave is represented as a list mixing edit instructions and
110
literal text. Each entry in _weave can be either a string (or
111
unicode), or a tuple. If a string, it means that the given line
112
should be output in the currently active revisions.
113
114
If a tuple, it gives a processing instruction saying in which
115
revisions the enclosed lines are active. The tuple has the form
116
(instruction, version).
117
118
The instruction can be '{' or '}' for an insertion block, and '['
119
and ']' for a deletion block respectively. The version is the
120
integer version index. There is no replace operator, only deletes
121
and inserts.
122
123
Constraints/notes:
124
125
* A later version can delete lines that were introduced by any
126
number of ancestor versions; this implies that deletion
127
instructions can span insertion blocks without regard to the
128
insertion block's nesting.
129
130
* Similarly, deletions need not be properly nested with regard to
131
each other, because they might have been generated by
132
independent revisions.
133
134
* Insertions are always made by inserting a new bracketed block
135
into a single point in the previous weave. This implies they
136
can nest but not overlap, and the nesting must always have later
137
insertions on the inside.
138
139
* It doesn't seem very useful to have an active insertion
140
inside an inactive insertion, but it might happen.
141
142
* Therefore, all instructions are always"considered"; that
143
is passed onto and off the stack. An outer inactive block
144
doesn't disable an inner block.
145
146
* Lines are enabled if the most recent enclosing insertion is
147
active and none of the enclosing deletions are active.
148
149
* There is no point having a deletion directly inside its own
150
insertion; you might as well just not write it. And there
151
should be no way to get an earlier version deleting a later
152
version.
153
154
_weave
155
Text of the weave; list of control instruction tuples and strings.
156
157
_parents
158
List of parents, indexed by version number.
159
It is only necessary to store the minimal set of parents for
160
each version; the parent's parents are implied.
161
162
_sha1s
163
List of hex SHA-1 of each version, or None if not recorded.
164
"""
165
166
__slots__ = ['_weave', '_parents', '_sha1s']
167
168
def __init__(self):
169
self._weave = []
170
self._parents = []
171
self._sha1s = []
172
173
174
def __eq__(self, other):
175
if not isinstance(other, Weave):
176
return False
177
return self._parents == other._parents \
178
and self._weave == other._weave
179
180
181
def __ne__(self, other):
182
return not self.__eq__(other)
183
184
185
def add(self, parents, text):
186
"""Add a single text on top of the weave.
187
188
Returns the index number of the newly added version.
189
190
parents
191
List or set of direct parent version numbers.
192
193
text
194
Sequence of lines to be added in the new version."""
195
196
self._check_versions(parents)
197
## self._check_lines(text)
198
new_version = len(self._parents)
199
200
import sha
201
s = sha.new()
202
map(s.update, text)
203
sha1 = s.hexdigest()
204
del s
205
206
# if we abort after here the weave will be corrupt
207
self._parents.append(frozenset(parents))
208
self._sha1s.append(sha1)
209
210
211
if not parents:
212
# special case; adding with no parents revision; can do
213
# this more quickly by just appending unconditionally.
214
# even more specially, if we're adding an empty text we
215
# need do nothing at all.
216
if text:
217
self._weave.append(('{', new_version))
218
self._weave.extend(text)
219
self._weave.append(('}', new_version))
220
221
return new_version
222
223
if len(parents) == 1:
224
pv = list(parents)[0]
225
if sha1 == self._sha1s[pv]:
226
# special case: same as the single parent
227
return new_version
228
229
230
ancestors = self.inclusions(parents)
231
232
l = self._weave
233
234
# basis a list of (origin, lineno, line)
235
basis_lineno = []
236
basis_lines = []
237
for origin, lineno, line in self._extract(ancestors):
238
basis_lineno.append(lineno)
239
basis_lines.append(line)
240
241
# another small special case: a merge, producing the same text as auto-merge
242
if text == basis_lines:
243
return new_version
244
245
# add a sentinal, because we can also match against the final line
246
basis_lineno.append(len(self._weave))
247
248
# XXX: which line of the weave should we really consider
249
# matches the end of the file? the current code says it's the
250
# last line of the weave?
251
252
#print 'basis_lines:', basis_lines
253
#print 'new_lines: ', lines
254
255
from difflib import SequenceMatcher
256
s = SequenceMatcher(None, basis_lines, text)
257
258
# offset gives the number of lines that have been inserted
259
# into the weave up to the current point; if the original edit instruction
260
# says to change line A then we actually change (A+offset)
261
offset = 0
262
263
for tag, i1, i2, j1, j2 in s.get_opcodes():
264
# i1,i2 are given in offsets within basis_lines; we need to map them
265
# back to offsets within the entire weave
266
#print 'raw match', tag, i1, i2, j1, j2
267
if tag == 'equal':
268
continue
269
270
i1 = basis_lineno[i1]
271
i2 = basis_lineno[i2]
272
273
assert 0 <= j1 <= j2 <= len(text)
274
275
#print tag, i1, i2, j1, j2
276
277
# the deletion and insertion are handled separately.
278
# first delete the region.
279
if i1 != i2:
280
self._weave.insert(i1+offset, ('[', new_version))
281
self._weave.insert(i2+offset+1, (']', new_version))
282
offset += 2
283
284
if j1 != j2:
285
# there may have been a deletion spanning up to
286
# i2; we want to insert after this region to make sure
287
# we don't destroy ourselves
288
i = i2 + offset
289
self._weave[i:i] = ([('{', new_version)]
290
+ text[j1:j2]
291
+ [('}', new_version)])
292
offset += 2 + (j2 - j1)
293
294
return new_version
295
296
297
def inclusions(self, versions):
298
"""Return set of all ancestors of given version(s)."""
299
i = set(versions)
300
v = max(versions)
301
try:
302
while v >= 0:
303
if v in i:
304
# include all its parents
305
i.update(self._parents[v])
306
v -= 1
307
return i
308
except IndexError:
309
raise ValueError("version %d not present in weave" % v)
310
311
312
def minimal_parents(self, version):
313
"""Find the minimal set of parents for the version."""
314
included = self._parents[version]
315
if not included:
316
return []
317
318
li = list(included)
319
li.sort(reverse=True)
320
321
mininc = []
322
gotit = set()
323
324
for pv in li:
325
if pv not in gotit:
326
mininc.append(pv)
327
gotit.update(self.inclusions(pv))
328
329
assert mininc[0] >= 0
330
assert mininc[-1] < version
331
return mininc
332
333
334
335
def _check_lines(self, text):
336
if not isinstance(text, list):
337
raise ValueError("text should be a list, not %s" % type(text))
338
339
for l in text:
340
if not isinstance(l, basestring):
341
raise ValueError("text line should be a string or unicode, not %s"
342
% type(l))
343
344
345
346
def _check_versions(self, indexes):
347
"""Check everything in the sequence of indexes is valid"""
348
for i in indexes:
349
try:
350
self._parents[i]
351
except IndexError:
352
raise IndexError("invalid version number %r" % i)
353
354
355
def annotate(self, index):
356
return list(self.annotate_iter(index))
357
358
359
def annotate_iter(self, version):
360
"""Yield list of (index-id, line) pairs for the specified version.
361
362
The index indicates when the line originated in the weave."""
363
for origin, lineno, text in self._extract([version]):
364
yield origin, text
365
366
367
def _walk(self):
368
"""Walk the weave.
369
370
Yields sequence of
371
(lineno, insert, deletes, text)
372
for each literal line.
373
"""
374
375
istack = []
376
dset = set()
377
378
lineno = 0 # line of weave, 0-based
379
380
for l in self._weave:
381
if isinstance(l, tuple):
382
c, v = l
383
isactive = None
384
if c == '{':
385
istack.append(v)
386
elif c == '}':
387
oldv = istack.pop()
388
elif c == '[':
389
assert v not in dset
390
dset.add(v)
391
elif c == ']':
392
dset.remove(v)
393
else:
394
raise WeaveFormatError('unexpected instruction %r'
395
% v)
396
else:
397
assert isinstance(l, basestring)
398
assert istack
399
yield lineno, istack[-1], dset, l
400
lineno += 1
401
402
403
404
def _extract(self, versions):
405
"""Yield annotation of lines in included set.
406
407
Yields a sequence of tuples (origin, lineno, text), where
408
origin is the origin version, lineno the index in the weave,
409
and text the text of the line.
410
411
The set typically but not necessarily corresponds to a version.
412
"""
413
included = self.inclusions(versions)
414
415
istack = []
416
dset = set()
417
418
lineno = 0 # line of weave, 0-based
419
420
isactive = None
421
422
result = []
423
424
WFE = WeaveFormatError
425
426
for l in self._weave:
427
if isinstance(l, tuple):
428
c, v = l
429
isactive = None
430
if c == '{':
431
assert v not in istack
432
istack.append(v)
433
elif c == '}':
434
oldv = istack.pop()
435
assert oldv == v
436
elif c == '[':
437
if v in included:
438
assert v not in dset
439
dset.add(v)
440
else:
441
assert c == ']'
442
if v in included:
443
assert v in dset
444
dset.remove(v)
445
else:
446
assert isinstance(l, basestring)
447
if isactive is None:
448
isactive = (not dset) and istack and (istack[-1] in included)
449
if isactive:
450
result.append((istack[-1], lineno, l))
451
lineno += 1
452
453
if istack:
454
raise WFE("unclosed insertion blocks at end of weave",
455
istack)
456
if dset:
457
raise WFE("unclosed deletion blocks at end of weave",
458
dset)
459
460
return result
461
462
463
464
def get_iter(self, version):
465
"""Yield lines for the specified version."""
466
for origin, lineno, line in self._extract([version]):
467
yield line
468
469
470
def get(self, index):
471
return list(self.get_iter(index))
472
473
474
def mash_iter(self, included):
475
"""Return composed version of multiple included versions."""
476
for origin, lineno, text in self._extract(included):
477
yield text
478
479
480
def dump(self, to_file):
481
from pprint import pprint
482
print >>to_file, "Weave._weave = ",
483
pprint(self._weave, to_file)
484
print >>to_file, "Weave._parents = ",
485
pprint(self._parents, to_file)
486
487
488
489
def numversions(self):
490
l = len(self._parents)
491
assert l == len(self._sha1s)
492
return l
493
494
495
def __len__(self):
496
return self.numversions()
497
498
499
def check(self, progress_bar=None):
500
# check no circular inclusions
501
for version in range(self.numversions()):
502
inclusions = list(self._parents[version])
503
if inclusions:
504
inclusions.sort()
505
if inclusions[-1] >= version:
506
raise WeaveFormatError("invalid included version %d for index %d"
507
% (inclusions[-1], version))
508
509
# try extracting all versions; this is a bit slow and parallel
510
# extraction could be used
511
import sha
512
nv = self.numversions()
513
for version in range(nv):
514
if progress_bar:
515
progress_bar.update('checking text', version, nv)
516
s = sha.new()
517
for l in self.get_iter(version):
518
s.update(l)
519
hd = s.hexdigest()
520
expected = self._sha1s[version]
521
if hd != expected:
522
raise WeaveError("mismatched sha1 for version %d; "
523
"got %s, expected %s"
524
% (version, hd, expected))
525
526
# TODO: check insertions are properly nested, that there are
527
# no lines outside of insertion blocks, that deletions are
528
# properly paired, etc.
529
530
531
532
def merge(self, merge_versions):
533
"""Automerge and mark conflicts between versions.
534
535
This returns a sequence, each entry describing alternatives
536
for a chunk of the file. Each of the alternatives is given as
537
a list of lines.
538
539
If there is a chunk of the file where there's no diagreement,
540
only one alternative is given.
541
"""
542
543
# approach: find the included versions common to all the
544
# merged versions
545
raise NotImplementedError()
546
547
548
549
def _delta(self, included, lines):
550
"""Return changes from basis to new revision.
551
552
The old text for comparison is the union of included revisions.
553
554
This is used in inserting a new text.
555
556
Delta is returned as a sequence of
557
(weave1, weave2, newlines).
558
559
This indicates that weave1:weave2 of the old weave should be
560
replaced by the sequence of lines in newlines. Note that
561
these line numbers are positions in the total weave and don't
562
correspond to the lines in any extracted version, or even the
563
extracted union of included versions.
564
565
If line1=line2, this is a pure insert; if newlines=[] this is a
566
pure delete. (Similar to difflib.)
567
"""
568
569
570
571
def plan_merge(self, ver_a, ver_b):
572
"""Return pseudo-annotation indicating how the two versions merge.
573
574
This is computed between versions a and b and their common
575
base.
576
577
Weave lines present in none of them are skipped entirely.
578
"""
579
inc_a = self.inclusions([ver_a])
580
inc_b = self.inclusions([ver_b])
581
inc_c = inc_a & inc_b
582
583
for lineno, insert, deleteset, line in self._walk():
584
if deleteset & inc_c:
585
# killed in parent; can't be in either a or b
586
# not relevant to our work
587
yield 'killed-base', line
588
elif insert in inc_c:
589
# was inserted in base
590
killed_a = bool(deleteset & inc_a)
591
killed_b = bool(deleteset & inc_b)
592
if killed_a and killed_b:
593
yield 'killed-both', line
594
elif killed_a:
595
yield 'killed-a', line
596
elif killed_b:
597
yield 'killed-b', line
598
else:
599
yield 'unchanged', line
600
elif insert in inc_a:
601
if deleteset & inc_a:
602
yield 'ghost-a', line
603
else:
604
# new in A; not in B
605
yield 'new-a', line
606
elif insert in inc_b:
607
if deleteset & inc_b:
608
yield 'ghost-b', line
609
else:
610
yield 'new-b', line
611
else:
612
# not in either revision
613
yield 'irrelevant', line
614
615
yield 'unchanged', '' # terminator
616
617
618
619
def weave_merge(self, plan):
620
lines_a = []
621
lines_b = []
622
ch_a = ch_b = False
623
624
for state, line in plan:
625
if state == 'unchanged' or state == 'killed-both':
626
# resync and flush queued conflicts changes if any
627
if not lines_a and not lines_b:
628
pass
629
elif ch_a and not ch_b:
630
# one-sided change:
631
for l in lines_a: yield l
632
elif ch_b and not ch_a:
633
for l in lines_b: yield l
634
elif lines_a == lines_b:
635
for l in lines_a: yield l
636
else:
637
yield '<<<<\n'
638
for l in lines_a: yield l
639
yield '====\n'
640
for l in lines_b: yield l
641
yield '>>>>\n'
642
643
del lines_a[:]
644
del lines_b[:]
645
ch_a = ch_b = False
646
647
if state == 'unchanged':
648
if line:
649
yield line
650
elif state == 'killed-a':
651
ch_a = True
652
lines_b.append(line)
653
elif state == 'killed-b':
654
ch_b = True
655
lines_a.append(line)
656
elif state == 'new-a':
657
ch_a = True
658
lines_a.append(line)
659
elif state == 'new-b':
660
ch_b = True
661
lines_b.append(line)
662
else:
663
assert state in ('irrelevant', 'ghost-a', 'ghost-b', 'killed-base',
664
'killed-both'), \
665
state
666
667
668
669
670
671
672
673
def weave_info(w):
674
"""Show some text information about the weave."""
675
print '%6s %40s %20s' % ('ver', 'sha1', 'parents')
676
for i in (6, 40, 20):
677
print '-' * i,
678
print
679
for i in range(w.numversions()):
680
sha1 = w._sha1s[i]
681
print '%6d %40s %s' % (i, sha1, ' '.join(map(str, w._parents[i])))
682
683
684
685
def weave_stats(weave_file):
686
from bzrlib.progress import ProgressBar
687
from bzrlib.weavefile import read_weave
688
689
pb = ProgressBar()
690
691
wf = file(weave_file, 'rb')
692
w = read_weave(wf)
693
# FIXME: doesn't work on pipes
694
weave_size = wf.tell()
695
696
total = 0
697
vers = len(w)
698
for i in range(vers):
699
pb.update('checking sizes', i, vers)
700
for line in w.get_iter(i):
701
total += len(line)
702
703
pb.clear()
704
705
print 'versions %9d' % vers
706
print 'weave file %9d bytes' % weave_size
707
print 'total contents %9d bytes' % total
708
print 'compression ratio %9.2fx' % (float(total) / float(weave_size))
709
710
711
712
def usage():
713
print """bzr weave tool
714
715
Experimental tool for weave algorithm.
716
717
usage:
718
weave init WEAVEFILE
719
Create an empty weave file
720
weave get WEAVEFILE VERSION
721
Write out specified version.
722
weave check WEAVEFILE
723
Check consistency of all versions.
724
weave info WEAVEFILE
725
Display table of contents.
726
weave add WEAVEFILE [BASE...] < NEWTEXT
727
Add NEWTEXT, with specified parent versions.
728
weave annotate WEAVEFILE VERSION
729
Display origin of each line.
730
weave mash WEAVEFILE VERSION...
731
Display composite of all selected versions.
732
weave merge WEAVEFILE VERSION1 VERSION2 > OUT
733
Auto-merge two versions and display conflicts.
734
735
example:
736
737
% weave init foo.weave
738
% vi foo.txt
739
% weave add foo.weave < foo.txt
740
added version 0
741
742
(create updated version)
743
% vi foo.txt
744
% weave get foo.weave 0 | diff -u - foo.txt
745
% weave add foo.weave 0 < foo.txt
746
added version 1
747
748
% weave get foo.weave 0 > foo.txt (create forked version)
749
% vi foo.txt
750
% weave add foo.weave 0 < foo.txt
751
added version 2
752
753
% weave merge foo.weave 1 2 > foo.txt (merge them)
754
% vi foo.txt (resolve conflicts)
755
% weave add foo.weave 1 2 < foo.txt (commit merged version)
756
757
"""
758
759
760
761
def main(argv):
762
import sys
763
import os
764
from weavefile import write_weave, read_weave
765
from bzrlib.progress import ProgressBar
766
767
#import psyco
768
#psyco.full()
769
770
cmd = argv[1]
771
772
def readit():
773
return read_weave(file(argv[2], 'rb'))
774
775
if cmd == 'help':
776
usage()
777
elif cmd == 'add':
778
w = readit()
779
# at the moment, based on everything in the file
780
parents = map(int, argv[3:])
781
lines = sys.stdin.readlines()
782
ver = w.add(parents, lines)
783
write_weave(w, file(argv[2], 'wb'))
784
print 'added version %d' % ver
785
elif cmd == 'init':
786
fn = argv[2]
787
if os.path.exists(fn):
788
raise IOError("file exists")
789
w = Weave()
790
write_weave(w, file(fn, 'wb'))
791
elif cmd == 'get': # get one version
792
w = readit()
793
sys.stdout.writelines(w.get_iter(int(argv[3])))
794
795
elif cmd == 'mash': # get composite
796
w = readit()
797
sys.stdout.writelines(w.mash_iter(map(int, argv[3:])))
798
799
elif cmd == 'annotate':
800
w = readit()
801
# newline is added to all lines regardless; too hard to get
802
# reasonable formatting otherwise
803
lasto = None
804
for origin, text in w.annotate(int(argv[3])):
805
text = text.rstrip('\r\n')
806
if origin == lasto:
807
print ' | %s' % (text)
808
else:
809
print '%5d | %s' % (origin, text)
810
lasto = origin
811
812
elif cmd == 'info':
813
weave_info(readit())
814
815
elif cmd == 'stats':
816
weave_stats(argv[2])
817
818
elif cmd == 'check':
819
w = readit()
820
pb = ProgressBar()
821
w.check(pb)
822
pb.clear()
823
print '%d versions ok' % w.numversions()
824
825
elif cmd == 'inclusions':
826
w = readit()
827
print ' '.join(map(str, w.inclusions([int(argv[3])])))
828
829
elif cmd == 'parents':
830
w = readit()
831
print ' '.join(map(str, w._parents[int(argv[3])]))
832
833
elif cmd == 'plan-merge':
834
w = readit()
835
for state, line in w.plan_merge(int(argv[3]), int(argv[4])):
836
if line:
837
print '%14s | %s' % (state, line),
838
839
elif cmd == 'merge':
840
w = readit()
841
p = w.plan_merge(int(argv[3]), int(argv[4]))
842
sys.stdout.writelines(w.weave_merge(p))
843
844
elif cmd == 'mash-merge':
845
if len(argv) != 5:
846
usage()
847
return 1
848
849
w = readit()
850
v1, v2 = map(int, argv[3:5])
851
852
basis = w.inclusions([v1]).intersection(w.inclusions([v2]))
853
854
base_lines = list(w.mash_iter(basis))
855
a_lines = list(w.get(v1))
856
b_lines = list(w.get(v2))
857
858
from bzrlib.merge3 import Merge3
859
m3 = Merge3(base_lines, a_lines, b_lines)
860
861
name_a = 'version %d' % v1
862
name_b = 'version %d' % v2
863
sys.stdout.writelines(m3.merge_lines(name_a=name_a, name_b=name_b))
864
else:
865
raise ValueError('unknown command %r' % cmd)
866
867
868
if __name__ == '__main__':
869
import sys
870
sys.exit(main(sys.argv))
Loggerhead is a web-based interface for Breezy
Version: 2.0.1