199
160
each version; the parent's parents are implied.
202
List of hex SHA-1 of each version.
205
List of symbolic names for each version. Each should be unique.
208
For each name, the version number.
211
Descriptive name of this weave; typically the filename if known.
163
List of hex SHA-1 of each version, or None if not recorded.
215
__slots__ = ['_weave', '_parents', '_sha1s', '_names', '_name_map',
216
'_weave_name', '_matcher', '_allow_reserved']
218
def __init__(self, weave_name=None, access_mode='w', matcher=None,
219
get_scope=None, allow_reserved=False):
222
:param get_scope: A callable that returns an opaque object to be used
223
for detecting when this weave goes out of scope (should stop
224
answering requests or allowing mutation).
226
super(Weave, self).__init__()
166
__slots__ = ['_weave', '_parents', '_sha1s']
228
170
self._parents = []
232
self._weave_name = weave_name
234
self._matcher = bzrlib.patiencediff.PatienceSequenceMatcher
236
self._matcher = matcher
237
if get_scope is None:
238
get_scope = lambda:None
239
self._get_scope = get_scope
240
self._scope = get_scope()
241
self._access_mode = access_mode
242
self._allow_reserved = allow_reserved
245
return "Weave(%r)" % self._weave_name
247
def _check_write_ok(self):
248
"""Is the versioned file marked as 'finished' ? Raise if it is."""
249
if self._get_scope() != self._scope:
250
raise errors.OutSideTransaction()
251
if self._access_mode != 'w':
252
raise errors.ReadOnlyObjectDirtiedError(self)
255
"""Return a deep copy of self.
257
The copy can be modified without affecting the original weave."""
259
other._weave = self._weave[:]
260
other._parents = self._parents[:]
261
other._sha1s = self._sha1s[:]
262
other._names = self._names[:]
263
other._name_map = self._name_map.copy()
264
other._weave_name = self._weave_name
267
174
def __eq__(self, other):
268
175
if not isinstance(other, Weave):
270
177
return self._parents == other._parents \
271
and self._weave == other._weave \
272
and self._sha1s == other._sha1s
178
and self._weave == other._weave
274
181
def __ne__(self, other):
275
182
return not self.__eq__(other)
277
def _idx_to_name(self, version):
278
return self._names[version]
280
def _lookup(self, name):
281
"""Convert symbolic version name to index."""
282
if not self._allow_reserved:
283
self.check_not_reserved_id(name)
285
return self._name_map[name]
287
raise RevisionNotPresent(name, self._weave_name)
290
"""See VersionedFile.versions."""
291
return self._names[:]
293
def has_version(self, version_id):
294
"""See VersionedFile.has_version."""
295
return (version_id in self._name_map)
297
__contains__ = has_version
299
def get_record_stream(self, versions, ordering, include_delta_closure):
300
"""Get a stream of records for versions.
302
:param versions: The versions to include. Each version is a tuple
304
:param ordering: Either 'unordered' or 'topological'. A topologically
305
sorted stream has compression parents strictly before their
307
:param include_delta_closure: If True then the closure across any
308
compression parents will be included (in the opaque data).
309
:return: An iterator of ContentFactory objects, each of which is only
310
valid until the iterator is advanced.
312
versions = [version[-1] for version in versions]
313
if ordering == 'topological':
314
parents = self.get_parent_map(versions)
315
new_versions = tsort.topo_sort(parents)
316
new_versions.extend(set(versions).difference(set(parents)))
317
versions = new_versions
318
elif ordering == 'groupcompress':
319
parents = self.get_parent_map(versions)
320
new_versions = sort_groupcompress(parents)
321
new_versions.extend(set(versions).difference(set(parents)))
322
versions = new_versions
323
for version in versions:
325
yield WeaveContentFactory(version, self)
327
yield AbsentContentFactory((version,))
329
def get_parent_map(self, version_ids):
330
"""See VersionedFile.get_parent_map."""
332
for version_id in version_ids:
333
if version_id == NULL_REVISION:
338
map(self._idx_to_name,
339
self._parents[self._lookup(version_id)]))
340
except RevisionNotPresent:
342
result[version_id] = parents
345
def get_parents_with_ghosts(self, version_id):
346
raise NotImplementedError(self.get_parents_with_ghosts)
348
def insert_record_stream(self, stream):
349
"""Insert a record stream into this versioned file.
351
:param stream: A stream of records to insert.
353
:seealso VersionedFile.get_record_stream:
356
for record in stream:
357
# Raise an error when a record is missing.
358
if record.storage_kind == 'absent':
359
raise RevisionNotPresent([record.key[0]], self)
360
# adapt to non-tuple interface
361
parents = [parent[0] for parent in record.parents]
362
if (record.storage_kind == 'fulltext'
363
or record.storage_kind == 'chunked'):
364
self.add_lines(record.key[0], parents,
365
osutils.chunks_to_lines(record.get_bytes_as('chunked')))
367
adapter_key = record.storage_kind, 'fulltext'
369
adapter = adapters[adapter_key]
371
adapter_factory = adapter_registry.get(adapter_key)
372
adapter = adapter_factory(self)
373
adapters[adapter_key] = adapter
374
lines = split_lines(adapter.get_bytes(record))
376
self.add_lines(record.key[0], parents, lines)
377
except RevisionAlreadyPresent:
380
def _check_repeated_add(self, name, parents, text, sha1):
381
"""Check that a duplicated add is OK.
383
If it is, return the (old) index; otherwise raise an exception.
385
idx = self._lookup(name)
386
if sorted(self._parents[idx]) != sorted(parents) \
387
or sha1 != self._sha1s[idx]:
388
raise RevisionAlreadyPresent(name, self._weave_name)
391
def _add_lines(self, version_id, parents, lines, parent_texts,
392
left_matching_blocks, nostore_sha, random_id, check_content):
393
"""See VersionedFile.add_lines."""
394
idx = self._add(version_id, lines, map(self._lookup, parents),
395
nostore_sha=nostore_sha)
396
return sha_strings(lines), sum(map(len, lines)), idx
398
def _add(self, version_id, lines, parents, sha1=None, nostore_sha=None):
185
def add(self, parents, text):
399
186
"""Add a single text on top of the weave.
401
188
Returns the index number of the newly added version.
404
Symbolic name for this version.
405
(Typically the revision-id of the revision that added it.)
406
If None, a name will be allocated based on the hash. (sha1:SHAHASH)
409
191
List or set of direct parent version numbers.
412
Sequence of lines to be added in the new version.
414
:param nostore_sha: See VersionedFile.add_lines.
416
self._check_lines_not_unicode(lines)
417
self._check_lines_are_lines(lines)
419
sha1 = sha_strings(lines)
420
if sha1 == nostore_sha:
421
raise errors.ExistingContent
422
if version_id is None:
423
version_id = "sha1:" + sha1
424
if version_id in self._name_map:
425
return self._check_repeated_add(version_id, parents, lines, sha1)
194
Sequence of lines to be added in the new version."""
427
196
self._check_versions(parents)
428
## self._check_lines(lines)
197
## self._check_lines(text)
429
198
new_version = len(self._parents)
431
# if we abort after here the (in-memory) weave will be corrupt because only
432
# some fields are updated
433
# XXX: FIXME implement a succeed-or-fail of the rest of this routine.
434
# - Robert Collins 20060226
435
self._parents.append(parents[:])
206
# if we abort after here the weave will be corrupt
207
self._parents.append(frozenset(parents))
436
208
self._sha1s.append(sha1)
437
self._names.append(version_id)
438
self._name_map[version_id] = new_version
442
212
# special case; adding with no parents revision; can do
443
213
# this more quickly by just appending unconditionally.
444
214
# even more specially, if we're adding an empty text we
445
215
# need do nothing at all.
447
217
self._weave.append(('{', new_version))
448
self._weave.extend(lines)
449
self._weave.append(('}', None))
218
self._weave.extend(text)
219
self._weave.append(('}', new_version))
450
221
return new_version
452
223
if len(parents) == 1:
554
352
except IndexError:
555
353
raise IndexError("invalid version number %r" % i)
557
def _compatible_parents(self, my_parents, other_parents):
558
"""During join check that other_parents are joinable with my_parents.
560
Joinable is defined as 'is a subset of' - supersets may require
561
regeneration of diffs, but subsets do not.
563
return len(other_parents.difference(my_parents)) == 0
565
def annotate(self, version_id):
566
"""Return a list of (version-id, line) tuples for version_id.
356
def annotate(self, index):
357
return list(self.annotate_iter(index))
360
def annotate_iter(self, version):
361
"""Yield list of (index-id, line) pairs for the specified version.
568
363
The index indicates when the line originated in the weave."""
569
incls = [self._lookup(version_id)]
570
return [(self._idx_to_name(origin), text) for origin, lineno, text in
571
self._extract(incls)]
573
def iter_lines_added_or_present_in_versions(self, version_ids=None,
575
"""See VersionedFile.iter_lines_added_or_present_in_versions()."""
576
if version_ids is None:
577
version_ids = self.versions()
578
version_ids = set(version_ids)
579
for lineno, inserted, deletes, line in self._walk_internal(version_ids):
580
if inserted not in version_ids: continue
582
yield line + '\n', inserted
586
def _walk_internal(self, version_ids=None):
587
"""Helper method for weave actions."""
364
for origin, lineno, text in self._extract([version]):
372
(lineno, insert, deletes, text)
373
for each literal line.
592
379
lineno = 0 # line of weave, 0-based
594
381
for l in self._weave:
595
if l.__class__ == tuple:
382
if isinstance(l, tuple):
599
istack.append(self._names[v])
603
dset.add(self._names[v])
605
dset.remove(self._names[v])
607
raise WeaveFormatError('unexpected instruction %r' % v)
609
yield lineno, istack[-1], frozenset(dset), l
395
raise WeaveFormatError('unexpected instruction %r'
398
assert isinstance(l, basestring)
400
yield lineno, istack[-1], dset, l
405
def _extract(self, versions):
406
"""Yield annotation of lines in included set.
408
Yields a sequence of tuples (origin, lineno, text), where
409
origin is the origin version, lineno the index in the weave,
410
and text the text of the line.
412
The set typically but not necessarily corresponds to a version.
414
included = self.inclusions(versions)
419
lineno = 0 # line of weave, 0-based
425
WFE = WeaveFormatError
427
for l in self._weave:
428
if isinstance(l, tuple):
432
assert v not in istack
447
assert isinstance(l, basestring)
449
isactive = (not dset) and istack and (istack[-1] in included)
451
result.append((istack[-1], lineno, l))
613
raise WeaveFormatError("unclosed insertion blocks "
614
"at end of weave: %s" % istack)
455
raise WFE("unclosed insertion blocks at end of weave",
616
raise WeaveFormatError("unclosed deletion blocks at end of weave: %s"
458
raise WFE("unclosed deletion blocks at end of weave",
465
def get_iter(self, version):
466
"""Yield lines for the specified version."""
467
for origin, lineno, line in self._extract([version]):
471
def get(self, index):
472
return list(self.get_iter(index))
475
def mash_iter(self, included):
476
"""Return composed version of multiple included versions."""
477
for origin, lineno, text in self._extract(included):
481
def dump(self, to_file):
482
from pprint import pprint
483
print >>to_file, "Weave._weave = ",
484
pprint(self._weave, to_file)
485
print >>to_file, "Weave._parents = ",
486
pprint(self._parents, to_file)
490
def numversions(self):
491
l = len(self._parents)
492
assert l == len(self._sha1s)
497
return self.numversions()
500
def check(self, progress_bar=None):
501
# check no circular inclusions
502
for version in range(self.numversions()):
503
inclusions = list(self._parents[version])
506
if inclusions[-1] >= version:
507
raise WeaveFormatError("invalid included version %d for index %d"
508
% (inclusions[-1], version))
510
# try extracting all versions; this is a bit slow and parallel
511
# extraction could be used
513
nv = self.numversions()
514
for version in range(nv):
516
progress_bar.update('checking text', version, nv)
518
for l in self.get_iter(version):
521
expected = self._sha1s[version]
523
raise WeaveError("mismatched sha1 for version %d; "
524
"got %s, expected %s"
525
% (version, hd, expected))
527
# TODO: check insertions are properly nested, that there are
528
# no lines outside of insertion blocks, that deletions are
529
# properly paired, etc.
533
def merge(self, merge_versions):
534
"""Automerge and mark conflicts between versions.
536
This returns a sequence, each entry describing alternatives
537
for a chunk of the file. Each of the alternatives is given as
540
If there is a chunk of the file where there's no diagreement,
541
only one alternative is given.
544
# approach: find the included versions common to all the
546
raise NotImplementedError()
550
def _delta(self, included, lines):
551
"""Return changes from basis to new revision.
553
The old text for comparison is the union of included revisions.
555
This is used in inserting a new text.
557
Delta is returned as a sequence of
558
(weave1, weave2, newlines).
560
This indicates that weave1:weave2 of the old weave should be
561
replaced by the sequence of lines in newlines. Note that
562
these line numbers are positions in the total weave and don't
563
correspond to the lines in any extracted version, or even the
564
extracted union of included versions.
566
If line1=line2, this is a pure insert; if newlines=[] this is a
567
pure delete. (Similar to difflib.)
619
572
def plan_merge(self, ver_a, ver_b):
620
573
"""Return pseudo-annotation indicating how the two versions merge.
660
613
# not in either revision
661
614
yield 'irrelevant', line
663
def _extract(self, versions):
664
"""Yield annotation of lines in included set.
666
Yields a sequence of tuples (origin, lineno, text), where
667
origin is the origin version, lineno the index in the weave,
668
and text the text of the line.
670
The set typically but not necessarily corresponds to a version.
673
if not isinstance(i, int):
676
included = self._inclusions(versions)
682
lineno = 0 # line of weave, 0-based
688
WFE = WeaveFormatError
691
# 449 0 4474.6820 2356.5590 bzrlib.weave:556(_extract)
692
# +285282 0 1676.8040 1676.8040 +<isinstance>
693
# 1.6 seconds in 'isinstance'.
694
# changing the first isinstance:
695
# 449 0 2814.2660 1577.1760 bzrlib.weave:556(_extract)
696
# +140414 0 762.8050 762.8050 +<isinstance>
697
# note that the inline time actually dropped (less function calls)
698
# and total processing time was halved.
699
# we're still spending ~1/4 of the method in isinstance though.
700
# so lets hard code the acceptable string classes we expect:
701
# 449 0 1202.9420 786.2930 bzrlib.weave:556(_extract)
702
# +71352 0 377.5560 377.5560 +<method 'append' of 'list'
704
# yay, down to ~1/4 the initial extract time, and our inline time
705
# has shrunk again, with isinstance no longer dominating.
706
# tweaking the stack inclusion test to use a set gives:
707
# 449 0 1122.8030 713.0080 bzrlib.weave:556(_extract)
708
# +71352 0 354.9980 354.9980 +<method 'append' of 'list'
710
# - a 5% win, or possibly just noise. However with large istacks that
711
# 'in' test could dominate, so I'm leaving this change in place -
712
# when its fast enough to consider profiling big datasets we can review.
717
for l in self._weave:
718
if l.__class__ == tuple:
725
iset.remove(istack.pop())
616
yield 'unchanged', '' # terminator
620
def weave_merge(self, plan):
625
for state, line in plan:
626
if state == 'unchanged' or state == 'killed-both':
627
# resync and flush queued conflicts changes if any
628
if not lines_a and not lines_b:
630
elif ch_a and not ch_b:
632
for l in lines_a: yield l
633
elif ch_b and not ch_a:
634
for l in lines_b: yield l
635
elif lines_a == lines_b:
636
for l in lines_a: yield l
733
raise AssertionError()
736
isactive = (not dset) and istack and (istack[-1] in included)
738
result.append((istack[-1], lineno, l))
741
raise WeaveFormatError("unclosed insertion blocks "
742
"at end of weave: %s" % istack)
744
raise WeaveFormatError("unclosed deletion blocks at end of weave: %s"
748
def _maybe_lookup(self, name_or_index):
749
"""Convert possible symbolic name to index, or pass through indexes.
753
if isinstance(name_or_index, (int, long)):
756
return self._lookup(name_or_index)
758
def get_lines(self, version_id):
759
"""See VersionedFile.get_lines()."""
760
int_index = self._maybe_lookup(version_id)
761
result = [line for (origin, lineno, line) in self._extract([int_index])]
762
expected_sha1 = self._sha1s[int_index]
763
measured_sha1 = sha_strings(result)
764
if measured_sha1 != expected_sha1:
765
raise errors.WeaveInvalidChecksum(
766
'file %s, revision %s, expected: %s, measured %s'
767
% (self._weave_name, version_id,
768
expected_sha1, measured_sha1))
771
def get_sha1s(self, version_ids):
772
"""See VersionedFile.get_sha1s()."""
774
for v in version_ids:
775
result[v] = self._sha1s[self._lookup(v)]
778
def num_versions(self):
779
"""How many versions are in this weave?"""
780
l = len(self._parents)
783
__len__ = num_versions
785
def check(self, progress_bar=None):
786
# TODO evaluate performance hit of using string sets in this routine.
787
# TODO: check no circular inclusions
788
# TODO: create a nested progress bar
789
for version in range(self.num_versions()):
790
inclusions = list(self._parents[version])
793
if inclusions[-1] >= version:
794
raise WeaveFormatError("invalid included version %d for index %d"
795
% (inclusions[-1], version))
797
# try extracting all versions; parallel extraction is used
798
nv = self.num_versions()
803
# For creating the ancestry, IntSet is much faster (3.7s vs 0.17s)
804
# The problem is that set membership is much more expensive
805
name = self._idx_to_name(i)
808
new_inc = set([name])
809
for p in self._parents[i]:
810
new_inc.update(inclusions[self._idx_to_name(p)])
812
if set(new_inc) != set(self.get_ancestry(name)):
813
raise AssertionError(
815
% (set(new_inc), set(self.get_ancestry(name))))
816
inclusions[name] = new_inc
818
nlines = len(self._weave)
820
update_text = 'checking weave'
822
short_name = os.path.basename(self._weave_name)
823
update_text = 'checking %s' % (short_name,)
824
update_text = update_text[:25]
826
for lineno, insert, deleteset, line in self._walk_internal():
828
progress_bar.update(update_text, lineno, nlines)
830
for name, name_inclusions in inclusions.items():
831
# The active inclusion must be an ancestor,
832
# and no ancestors must have deleted this line,
833
# because we don't support resurrection.
834
if (insert in name_inclusions) and not (deleteset & name_inclusions):
835
sha1s[name].update(line)
838
version = self._idx_to_name(i)
839
hd = sha1s[version].hexdigest()
840
expected = self._sha1s[i]
842
raise errors.WeaveInvalidChecksum(
843
"mismatched sha1 for version %s: "
844
"got %s, expected %s"
845
% (version, hd, expected))
847
# TODO: check insertions are properly nested, that there are
848
# no lines outside of insertion blocks, that deletions are
849
# properly paired, etc.
851
def _imported_parents(self, other, other_idx):
852
"""Return list of parents in self corresponding to indexes in other."""
854
for parent_idx in other._parents[other_idx]:
855
parent_name = other._names[parent_idx]
856
if parent_name not in self._name_map:
857
# should not be possible
858
raise WeaveError("missing parent {%s} of {%s} in %r"
859
% (parent_name, other._name_map[other_idx], self))
860
new_parents.append(self._name_map[parent_name])
863
def _check_version_consistent(self, other, other_idx, name):
864
"""Check if a version in consistent in this and other.
866
To be consistent it must have:
869
* the same direct parents (by name, not index, and disregarding
872
If present & correct return True;
873
if not present in self return False;
874
if inconsistent raise error."""
875
this_idx = self._name_map.get(name, -1)
877
if self._sha1s[this_idx] != other._sha1s[other_idx]:
878
raise errors.WeaveTextDiffers(name, self, other)
879
self_parents = self._parents[this_idx]
880
other_parents = other._parents[other_idx]
881
n1 = set([self._names[i] for i in self_parents])
882
n2 = set([other._names[i] for i in other_parents])
883
if not self._compatible_parents(n1, n2):
884
raise WeaveParentMismatch("inconsistent parents "
885
"for version {%s}: %s vs %s" % (name, n1, n2))
891
def _reweave(self, other, pb, msg):
892
"""Reweave self with other - internal helper for join().
894
:param other: The other weave to merge
895
:param pb: An optional progress bar, indicating how far done we are
896
:param msg: An optional message for the progress
898
new_weave = _reweave(self, other, pb=pb, msg=msg)
899
self._copy_weave_content(new_weave)
901
def _copy_weave_content(self, otherweave):
902
"""adsorb the content from otherweave."""
903
for attr in self.__slots__:
904
if attr != '_weave_name':
905
setattr(self, attr, copy(getattr(otherweave, attr)))
908
class WeaveFile(Weave):
909
"""A WeaveFile represents a Weave on disk and writes on change."""
911
WEAVE_SUFFIX = '.weave'
913
def __init__(self, name, transport, filemode=None, create=False, access_mode='w', get_scope=None):
914
"""Create a WeaveFile.
916
:param create: If not True, only open an existing knit.
918
super(WeaveFile, self).__init__(name, access_mode, get_scope=get_scope,
919
allow_reserved=False)
920
self._transport = transport
921
self._filemode = filemode
923
f = self._transport.get(name + WeaveFile.WEAVE_SUFFIX)
924
_read_weave_v5(StringIO(f.read()), self)
925
except errors.NoSuchFile:
931
def _add_lines(self, version_id, parents, lines, parent_texts,
932
left_matching_blocks, nostore_sha, random_id, check_content):
933
"""Add a version and save the weave."""
934
self.check_not_reserved_id(version_id)
935
result = super(WeaveFile, self)._add_lines(version_id, parents, lines,
936
parent_texts, left_matching_blocks, nostore_sha, random_id,
941
def copy_to(self, name, transport):
942
"""See VersionedFile.copy_to()."""
943
# as we are all in memory always, just serialise to the new place.
945
write_weave_v5(self, sio)
947
transport.put_file(name + WeaveFile.WEAVE_SUFFIX, sio, self._filemode)
950
"""Save the weave."""
951
self._check_write_ok()
953
write_weave_v5(self, sio)
955
bytes = sio.getvalue()
956
path = self._weave_name + WeaveFile.WEAVE_SUFFIX
958
self._transport.put_bytes(path, bytes, self._filemode)
959
except errors.NoSuchFile:
960
self._transport.mkdir(dirname(path))
961
self._transport.put_bytes(path, bytes, self._filemode)
965
"""See VersionedFile.get_suffixes()."""
966
return [WeaveFile.WEAVE_SUFFIX]
968
def insert_record_stream(self, stream):
969
super(WeaveFile, self).insert_record_stream(stream)
973
def _reweave(wa, wb, pb=None, msg=None):
974
"""Combine two weaves and return the result.
976
This works even if a revision R has different parents in
977
wa and wb. In the resulting weave all the parents are given.
979
This is done by just building up a new weave, maintaining ordering
980
of the versions in the two inputs. More efficient approaches
981
might be possible but it should only be necessary to do
982
this operation rarely, when a new previously ghost version is
985
:param pb: An optional progress bar, indicating how far done we are
986
:param msg: An optional message for the progress
990
queue_a = range(wa.num_versions())
991
queue_b = range(wb.num_versions())
992
# first determine combined parents of all versions
993
# map from version name -> all parent names
994
combined_parents = _reweave_parent_graphs(wa, wb)
995
mutter("combined parents: %r", combined_parents)
996
order = tsort.topo_sort(combined_parents.iteritems())
997
mutter("order to reweave: %r", order)
1002
for idx, name in enumerate(order):
1004
pb.update(msg, idx, len(order))
1005
if name in wa._name_map:
1006
lines = wa.get_lines(name)
1007
if name in wb._name_map:
1008
lines_b = wb.get_lines(name)
1009
if lines != lines_b:
1010
mutter('Weaves differ on content. rev_id {%s}', name)
1011
mutter('weaves: %s, %s', wa._weave_name, wb._weave_name)
1013
lines = list(difflib.unified_diff(lines, lines_b,
1014
wa._weave_name, wb._weave_name))
1015
mutter('lines:\n%s', ''.join(lines))
1016
raise errors.WeaveTextDiffers(name, wa, wb)
1018
lines = wb.get_lines(name)
1019
wr._add(name, lines, [wr._lookup(i) for i in combined_parents[name]])
1023
def _reweave_parent_graphs(wa, wb):
1024
"""Return combined parent ancestry for two weaves.
1026
Returned as a list of (version_name, set(parent_names))"""
1028
for weave in [wa, wb]:
1029
for idx, name in enumerate(weave._names):
1030
p = combined.setdefault(name, set())
1031
p.update(map(weave._idx_to_name, weave._parents[idx]))
639
for l in lines_a: yield l
641
for l in lines_b: yield l
648
if state == 'unchanged':
651
elif state == 'killed-a':
654
elif state == 'killed-b':
657
elif state == 'new-a':
660
elif state == 'new-b':
664
assert state in ('irrelevant', 'ghost-a', 'ghost-b', 'killed-base',
675
"""Show some text information about the weave."""
676
print '%6s %40s %20s' % ('ver', 'sha1', 'parents')
677
for i in (6, 40, 20):
680
for i in range(w.numversions()):
682
print '%6d %40s %s' % (i, sha1, ' '.join(map(str, w._parents[i])))
686
def weave_stats(weave_file):
687
from bzrlib.progress import ProgressBar
688
from bzrlib.weavefile import read_weave
692
wf = file(weave_file, 'rb')
694
# FIXME: doesn't work on pipes
695
weave_size = wf.tell()
699
for i in range(vers):
700
pb.update('checking sizes', i, vers)
701
for line in w.get_iter(i):
706
print 'versions %9d' % vers
707
print 'weave file %9d bytes' % weave_size
708
print 'total contents %9d bytes' % total
709
print 'compression ratio %9.2fx' % (float(total) / float(weave_size))
712
print 'average size %9d bytes' % avg
713
print 'relative size %9.2fx' % (float(weave_size) / float(avg))
717
print """bzr weave tool
719
Experimental tool for weave algorithm.
723
Create an empty weave file
724
weave get WEAVEFILE VERSION
725
Write out specified version.
726
weave check WEAVEFILE
727
Check consistency of all versions.
729
Display table of contents.
730
weave add WEAVEFILE [BASE...] < NEWTEXT
731
Add NEWTEXT, with specified parent versions.
732
weave annotate WEAVEFILE VERSION
733
Display origin of each line.
734
weave mash WEAVEFILE VERSION...
735
Display composite of all selected versions.
736
weave merge WEAVEFILE VERSION1 VERSION2 > OUT
737
Auto-merge two versions and display conflicts.
741
% weave init foo.weave
743
% weave add foo.weave < foo.txt
746
(create updated version)
748
% weave get foo.weave 0 | diff -u - foo.txt
749
% weave add foo.weave 0 < foo.txt
752
% weave get foo.weave 0 > foo.txt (create forked version)
754
% weave add foo.weave 0 < foo.txt
757
% weave merge foo.weave 1 2 > foo.txt (merge them)
758
% vi foo.txt (resolve conflicts)
759
% weave add foo.weave 1 2 < foo.txt (commit merged version)
768
from weavefile import write_weave, read_weave
769
from bzrlib.progress import ProgressBar
777
return read_weave(file(argv[2], 'rb'))
783
# at the moment, based on everything in the file
784
parents = map(int, argv[3:])
785
lines = sys.stdin.readlines()
786
ver = w.add(parents, lines)
787
write_weave(w, file(argv[2], 'wb'))
788
print 'added version %d' % ver
791
if os.path.exists(fn):
792
raise IOError("file exists")
794
write_weave(w, file(fn, 'wb'))
795
elif cmd == 'get': # get one version
797
sys.stdout.writelines(w.get_iter(int(argv[3])))
799
elif cmd == 'mash': # get composite
801
sys.stdout.writelines(w.mash_iter(map(int, argv[3:])))
803
elif cmd == 'annotate':
805
# newline is added to all lines regardless; too hard to get
806
# reasonable formatting otherwise
808
for origin, text in w.annotate(int(argv[3])):
809
text = text.rstrip('\r\n')
811
print ' | %s' % (text)
813
print '%5d | %s' % (origin, text)
827
print '%d versions ok' % w.numversions()
829
elif cmd == 'inclusions':
831
print ' '.join(map(str, w.inclusions([int(argv[3])])))
833
elif cmd == 'parents':
835
print ' '.join(map(str, w._parents[int(argv[3])]))
837
elif cmd == 'plan-merge':
839
for state, line in w.plan_merge(int(argv[3]), int(argv[4])):
841
print '%14s | %s' % (state, line),
845
p = w.plan_merge(int(argv[3]), int(argv[4]))
846
sys.stdout.writelines(w.weave_merge(p))
848
elif cmd == 'mash-merge':
854
v1, v2 = map(int, argv[3:5])
856
basis = w.inclusions([v1]).intersection(w.inclusions([v2]))
858
base_lines = list(w.mash_iter(basis))
859
a_lines = list(w.get(v1))
860
b_lines = list(w.get(v2))
862
from bzrlib.merge3 import Merge3
863
m3 = Merge3(base_lines, a_lines, b_lines)
865
name_a = 'version %d' % v1
866
name_b = 'version %d' % v2
867
sys.stdout.writelines(m3.merge_lines(name_a=name_a, name_b=name_b))
869
raise ValueError('unknown command %r' % cmd)
872
if __name__ == '__main__':
874
sys.exit(main(sys.argv))
added
removed
bzrlib/weave.py
