190
220
__slots__ = ['_weave', '_parents', '_sha1s', '_names', '_name_map',
193
def __init__(self, weave_name=None):
221
'_weave_name', '_matcher', '_allow_reserved']
223
def __init__(self, weave_name=None, access_mode='w', matcher=None,
224
get_scope=None, allow_reserved=False):
227
:param get_scope: A callable that returns an opaque object to be used
228
for detecting when this weave goes out of scope (should stop
229
answering requests or allowing mutation).
231
super(Weave, self).__init__()
195
233
self._parents = []
198
236
self._name_map = {}
199
237
self._weave_name = weave_name
239
self._matcher = bzrlib.patiencediff.PatienceSequenceMatcher
241
self._matcher = matcher
242
if get_scope is None:
243
get_scope = lambda:None
244
self._get_scope = get_scope
245
self._scope = get_scope()
246
self._access_mode = access_mode
247
self._allow_reserved = allow_reserved
250
return "Weave(%r)" % self._weave_name
252
def _check_write_ok(self):
253
"""Is the versioned file marked as 'finished' ? Raise if it is."""
254
if self._get_scope() != self._scope:
255
raise errors.OutSideTransaction()
256
if self._access_mode != 'w':
257
raise errors.ReadOnlyObjectDirtiedError(self)
260
"""Return a deep copy of self.
262
The copy can be modified without affecting the original weave."""
264
other._weave = self._weave[:]
265
other._parents = self._parents[:]
266
other._sha1s = self._sha1s[:]
267
other._names = self._names[:]
268
other._name_map = self._name_map.copy()
269
other._weave_name = self._weave_name
202
272
def __eq__(self, other):
203
273
if not isinstance(other, Weave):
205
275
return self._parents == other._parents \
206
276
and self._weave == other._weave \
207
and self._sha1s == other._sha1s
277
and self._sha1s == other._sha1s
210
279
def __ne__(self, other):
211
280
return not self.__eq__(other)
282
def _idx_to_name(self, version):
283
return self._names[version]
214
def lookup(self, name):
285
def _lookup(self, name):
286
"""Convert symbolic version name to index."""
287
if not self._allow_reserved:
288
self.check_not_reserved_id(name)
216
290
return self._name_map[name]
218
raise WeaveError("name %s not present in weave %s" %
219
(name, self._weave_name))
222
def add(self, name, parents, text):
292
raise RevisionNotPresent(name, self._weave_name)
295
"""See VersionedFile.versions."""
296
return self._names[:]
298
def has_version(self, version_id):
299
"""See VersionedFile.has_version."""
300
return (version_id in self._name_map)
302
__contains__ = has_version
304
def get_record_stream(self, versions, ordering, include_delta_closure):
305
"""Get a stream of records for versions.
307
:param versions: The versions to include. Each version is a tuple
309
:param ordering: Either 'unordered' or 'topological'. A topologically
310
sorted stream has compression parents strictly before their
312
:param include_delta_closure: If True then the closure across any
313
compression parents will be included (in the opaque data).
314
:return: An iterator of ContentFactory objects, each of which is only
315
valid until the iterator is advanced.
317
versions = [version[-1] for version in versions]
318
if ordering == 'topological':
319
parents = self.get_parent_map(versions)
320
new_versions = tsort.topo_sort(parents)
321
new_versions.extend(set(versions).difference(set(parents)))
322
versions = new_versions
323
elif ordering == 'groupcompress':
324
parents = self.get_parent_map(versions)
325
new_versions = sort_groupcompress(parents)
326
new_versions.extend(set(versions).difference(set(parents)))
327
versions = new_versions
328
for version in versions:
330
yield WeaveContentFactory(version, self)
332
yield AbsentContentFactory((version,))
334
def get_parent_map(self, version_ids):
335
"""See VersionedFile.get_parent_map."""
337
for version_id in version_ids:
338
if version_id == NULL_REVISION:
343
map(self._idx_to_name,
344
self._parents[self._lookup(version_id)]))
345
except RevisionNotPresent:
347
result[version_id] = parents
350
def get_parents_with_ghosts(self, version_id):
351
raise NotImplementedError(self.get_parents_with_ghosts)
353
def insert_record_stream(self, stream):
354
"""Insert a record stream into this versioned file.
356
:param stream: A stream of records to insert.
358
:seealso VersionedFile.get_record_stream:
361
for record in stream:
362
# Raise an error when a record is missing.
363
if record.storage_kind == 'absent':
364
raise RevisionNotPresent([record.key[0]], self)
365
# adapt to non-tuple interface
366
parents = [parent[0] for parent in record.parents]
367
if (record.storage_kind == 'fulltext'
368
or record.storage_kind == 'chunked'):
369
self.add_lines(record.key[0], parents,
370
osutils.chunks_to_lines(record.get_bytes_as('chunked')))
372
adapter_key = record.storage_kind, 'fulltext'
374
adapter = adapters[adapter_key]
376
adapter_factory = adapter_registry.get(adapter_key)
377
adapter = adapter_factory(self)
378
adapters[adapter_key] = adapter
379
lines = split_lines(adapter.get_bytes(record))
381
self.add_lines(record.key[0], parents, lines)
382
except RevisionAlreadyPresent:
385
def _check_repeated_add(self, name, parents, text, sha1):
386
"""Check that a duplicated add is OK.
388
If it is, return the (old) index; otherwise raise an exception.
390
idx = self._lookup(name)
391
if sorted(self._parents[idx]) != sorted(parents) \
392
or sha1 != self._sha1s[idx]:
393
raise RevisionAlreadyPresent(name, self._weave_name)
396
def _add_lines(self, version_id, parents, lines, parent_texts,
397
left_matching_blocks, nostore_sha, random_id, check_content):
398
"""See VersionedFile.add_lines."""
399
idx = self._add(version_id, lines, map(self._lookup, parents),
400
nostore_sha=nostore_sha)
401
return sha_strings(lines), sum(map(len, lines)), idx
403
def _add(self, version_id, lines, parents, sha1=None, nostore_sha=None):
223
404
"""Add a single text on top of the weave.
225
406
Returns the index number of the newly added version.
228
409
Symbolic name for this version.
229
410
(Typically the revision-id of the revision that added it.)
411
If None, a name will be allocated based on the hash. (sha1:SHAHASH)
232
414
List or set of direct parent version numbers.
235
Sequence of lines to be added in the new version."""
237
assert isinstance(name, basestring)
238
if name in self._name_map:
239
raise WeaveError("name %r already present in weave" % name)
417
Sequence of lines to be added in the new version.
419
:param nostore_sha: See VersionedFile.add_lines.
421
self._check_lines_not_unicode(lines)
422
self._check_lines_are_lines(lines)
424
sha1 = sha_strings(lines)
425
if sha1 == nostore_sha:
426
raise errors.ExistingContent
427
if version_id is None:
428
version_id = "sha1:" + sha1
429
if version_id in self._name_map:
430
return self._check_repeated_add(version_id, parents, lines, sha1)
241
432
self._check_versions(parents)
242
## self._check_lines(text)
433
## self._check_lines(lines)
243
434
new_version = len(self._parents)
250
436
# if we abort after here the (in-memory) weave will be corrupt because only
251
437
# some fields are updated
438
# XXX: FIXME implement a succeed-or-fail of the rest of this routine.
439
# - Robert Collins 20060226
252
440
self._parents.append(parents[:])
253
441
self._sha1s.append(sha1)
254
self._names.append(name)
255
self._name_map[name] = new_version
442
self._names.append(version_id)
443
self._name_map[version_id] = new_version
259
447
# special case; adding with no parents revision; can do
260
448
# this more quickly by just appending unconditionally.
261
449
# even more specially, if we're adding an empty text we
262
450
# need do nothing at all.
264
452
self._weave.append(('{', new_version))
265
self._weave.extend(text)
453
self._weave.extend(lines)
266
454
self._weave.append(('}', None))
268
455
return new_version
270
457
if len(parents) == 1:
399
559
except IndexError:
400
560
raise IndexError("invalid version number %r" % i)
403
def annotate(self, index):
404
return list(self.annotate_iter(index))
407
def annotate_iter(self, version):
408
"""Yield list of (index-id, line) pairs for the specified version.
562
def _compatible_parents(self, my_parents, other_parents):
563
"""During join check that other_parents are joinable with my_parents.
565
Joinable is defined as 'is a subset of' - supersets may require
566
regeneration of diffs, but subsets do not.
568
return len(other_parents.difference(my_parents)) == 0
570
def annotate(self, version_id):
571
"""Return a list of (version-id, line) tuples for version_id.
410
573
The index indicates when the line originated in the weave."""
411
for origin, lineno, text in self._extract([version]):
419
(lineno, insert, deletes, text)
420
for each literal line.
574
incls = [self._lookup(version_id)]
575
return [(self._idx_to_name(origin), text) for origin, lineno, text in
576
self._extract(incls)]
578
def iter_lines_added_or_present_in_versions(self, version_ids=None,
580
"""See VersionedFile.iter_lines_added_or_present_in_versions()."""
581
if version_ids is None:
582
version_ids = self.versions()
583
version_ids = set(version_ids)
584
for lineno, inserted, deletes, line in self._walk_internal(version_ids):
585
if inserted not in version_ids: continue
587
yield line + '\n', inserted
591
def _walk_internal(self, version_ids=None):
592
"""Helper method for weave actions."""
426
597
lineno = 0 # line of weave, 0-based
428
599
for l in self._weave:
429
if isinstance(l, tuple):
600
if l.__class__ == tuple:
604
istack.append(self._names[v])
608
dset.add(self._names[v])
610
dset.remove(self._names[v])
442
raise WeaveFormatError('unexpected instruction %r'
612
raise WeaveFormatError('unexpected instruction %r' % v)
445
assert isinstance(l, basestring)
447
yield lineno, istack[-1], dset, l
614
yield lineno, istack[-1], frozenset(dset), l
618
raise WeaveFormatError("unclosed insertion blocks "
619
"at end of weave: %s" % istack)
621
raise WeaveFormatError("unclosed deletion blocks at end of weave: %s"
624
def plan_merge(self, ver_a, ver_b):
625
"""Return pseudo-annotation indicating how the two versions merge.
627
This is computed between versions a and b and their common
630
Weave lines present in none of them are skipped entirely.
632
inc_a = set(self.get_ancestry([ver_a]))
633
inc_b = set(self.get_ancestry([ver_b]))
634
inc_c = inc_a & inc_b
636
for lineno, insert, deleteset, line in self._walk_internal([ver_a, ver_b]):
637
if deleteset & inc_c:
638
# killed in parent; can't be in either a or b
639
# not relevant to our work
640
yield 'killed-base', line
641
elif insert in inc_c:
642
# was inserted in base
643
killed_a = bool(deleteset & inc_a)
644
killed_b = bool(deleteset & inc_b)
645
if killed_a and killed_b:
646
yield 'killed-both', line
648
yield 'killed-a', line
650
yield 'killed-b', line
652
yield 'unchanged', line
653
elif insert in inc_a:
654
if deleteset & inc_a:
655
yield 'ghost-a', line
659
elif insert in inc_b:
660
if deleteset & inc_b:
661
yield 'ghost-b', line
665
# not in either revision
666
yield 'irrelevant', line
452
668
def _extract(self, versions):
453
669
"""Yield annotation of lines in included set.
476
693
WFE = WeaveFormatError
696
# 449 0 4474.6820 2356.5590 bzrlib.weave:556(_extract)
697
# +285282 0 1676.8040 1676.8040 +<isinstance>
698
# 1.6 seconds in 'isinstance'.
699
# changing the first isinstance:
700
# 449 0 2814.2660 1577.1760 bzrlib.weave:556(_extract)
701
# +140414 0 762.8050 762.8050 +<isinstance>
702
# note that the inline time actually dropped (less function calls)
703
# and total processing time was halved.
704
# we're still spending ~1/4 of the method in isinstance though.
705
# so lets hard code the acceptable string classes we expect:
706
# 449 0 1202.9420 786.2930 bzrlib.weave:556(_extract)
707
# +71352 0 377.5560 377.5560 +<method 'append' of 'list'
709
# yay, down to ~1/4 the initial extract time, and our inline time
710
# has shrunk again, with isinstance no longer dominating.
711
# tweaking the stack inclusion test to use a set gives:
712
# 449 0 1122.8030 713.0080 bzrlib.weave:556(_extract)
713
# +71352 0 354.9980 354.9980 +<method 'append' of 'list'
715
# - a 5% win, or possibly just noise. However with large istacks that
716
# 'in' test could dominate, so I'm leaving this change in place -
717
# when its fast enough to consider profiling big datasets we can review.
478
722
for l in self._weave:
479
if isinstance(l, tuple):
723
if l.__class__ == tuple:
483
assert v not in istack
730
iset.remove(istack.pop())
488
732
if v in included:
493
735
if v in included:
738
raise AssertionError()
497
assert isinstance(l, basestring)
498
740
if isactive is None:
499
741
isactive = (not dset) and istack and (istack[-1] in included)
501
743
result.append((istack[-1], lineno, l))
505
raise WFE("unclosed insertion blocks at end of weave",
746
raise WeaveFormatError("unclosed insertion blocks "
747
"at end of weave: %s" % istack)
508
raise WFE("unclosed deletion blocks at end of weave",
515
def get_iter(self, version):
516
"""Yield lines for the specified version."""
517
for origin, lineno, line in self._extract([version]):
521
def get_text(self, version):
522
assert isinstance(version, int)
524
s.writelines(self.get_iter(version))
528
def get(self, index):
529
return list(self.get_iter(index))
532
def mash_iter(self, included):
533
"""Return composed version of multiple included versions."""
534
for origin, lineno, text in self._extract(included):
538
def dump(self, to_file):
539
from pprint import pprint
540
print >>to_file, "Weave._weave = ",
541
pprint(self._weave, to_file)
542
print >>to_file, "Weave._parents = ",
543
pprint(self._parents, to_file)
547
def numversions(self):
749
raise WeaveFormatError("unclosed deletion blocks at end of weave: %s"
753
def _maybe_lookup(self, name_or_index):
754
"""Convert possible symbolic name to index, or pass through indexes.
758
if isinstance(name_or_index, (int, long)):
761
return self._lookup(name_or_index)
763
def get_lines(self, version_id):
764
"""See VersionedFile.get_lines()."""
765
int_index = self._maybe_lookup(version_id)
766
result = [line for (origin, lineno, line) in self._extract([int_index])]
767
expected_sha1 = self._sha1s[int_index]
768
measured_sha1 = sha_strings(result)
769
if measured_sha1 != expected_sha1:
770
raise errors.WeaveInvalidChecksum(
771
'file %s, revision %s, expected: %s, measured %s'
772
% (self._weave_name, version_id,
773
expected_sha1, measured_sha1))
776
def get_sha1s(self, version_ids):
777
"""See VersionedFile.get_sha1s()."""
779
for v in version_ids:
780
result[v] = self._sha1s[self._lookup(v)]
783
def num_versions(self):
784
"""How many versions are in this weave?"""
548
785
l = len(self._parents)
549
assert l == len(self._sha1s)
554
return self.numversions()
788
__len__ = num_versions
557
790
def check(self, progress_bar=None):
558
# check no circular inclusions
559
for version in range(self.numversions()):
791
# TODO evaluate performance hit of using string sets in this routine.
792
# TODO: check no circular inclusions
793
# TODO: create a nested progress bar
794
for version in range(self.num_versions()):
560
795
inclusions = list(self._parents[version])
562
797
inclusions.sort()
564
799
raise WeaveFormatError("invalid included version %d for index %d"
565
800
% (inclusions[-1], version))
567
# try extracting all versions; this is a bit slow and parallel
568
# extraction could be used
569
nv = self.numversions()
570
for version in range(nv):
802
# try extracting all versions; parallel extraction is used
803
nv = self.num_versions()
808
# For creating the ancestry, IntSet is much faster (3.7s vs 0.17s)
809
# The problem is that set membership is much more expensive
810
name = self._idx_to_name(i)
813
new_inc = set([name])
814
for p in self._parents[i]:
815
new_inc.update(inclusions[self._idx_to_name(p)])
817
if set(new_inc) != set(self.get_ancestry(name)):
818
raise AssertionError(
820
% (set(new_inc), set(self.get_ancestry(name))))
821
inclusions[name] = new_inc
823
nlines = len(self._weave)
825
update_text = 'checking weave'
827
short_name = os.path.basename(self._weave_name)
828
update_text = 'checking %s' % (short_name,)
829
update_text = update_text[:25]
831
for lineno, insert, deleteset, line in self._walk_internal():
572
progress_bar.update('checking text', version, nv)
574
for l in self.get_iter(version):
577
expected = self._sha1s[version]
833
progress_bar.update(update_text, lineno, nlines)
835
for name, name_inclusions in inclusions.items():
836
# The active inclusion must be an ancestor,
837
# and no ancestors must have deleted this line,
838
# because we don't support resurrection.
839
if (insert in name_inclusions) and not (deleteset & name_inclusions):
840
sha1s[name].update(line)
843
version = self._idx_to_name(i)
844
hd = sha1s[version].hexdigest()
845
expected = self._sha1s[i]
578
846
if hd != expected:
579
raise WeaveError("mismatched sha1 for version %d; "
580
"got %s, expected %s"
581
% (version, hd, expected))
847
raise errors.WeaveInvalidChecksum(
848
"mismatched sha1 for version %s: "
849
"got %s, expected %s"
850
% (version, hd, expected))
583
852
# TODO: check insertions are properly nested, that there are
584
853
# no lines outside of insertion blocks, that deletions are
585
854
# properly paired, etc.
589
def merge(self, merge_versions):
590
"""Automerge and mark conflicts between versions.
592
This returns a sequence, each entry describing alternatives
593
for a chunk of the file. Each of the alternatives is given as
596
If there is a chunk of the file where there's no diagreement,
597
only one alternative is given.
600
# approach: find the included versions common to all the
602
raise NotImplementedError()
606
def _delta(self, included, lines):
607
"""Return changes from basis to new revision.
609
The old text for comparison is the union of included revisions.
611
This is used in inserting a new text.
613
Delta is returned as a sequence of
614
(weave1, weave2, newlines).
616
This indicates that weave1:weave2 of the old weave should be
617
replaced by the sequence of lines in newlines. Note that
618
these line numbers are positions in the total weave and don't
619
correspond to the lines in any extracted version, or even the
620
extracted union of included versions.
622
If line1=line2, this is a pure insert; if newlines=[] this is a
623
pure delete. (Similar to difflib.)
628
def plan_merge(self, ver_a, ver_b):
629
"""Return pseudo-annotation indicating how the two versions merge.
631
This is computed between versions a and b and their common
634
Weave lines present in none of them are skipped entirely.
636
inc_a = self.inclusions([ver_a])
637
inc_b = self.inclusions([ver_b])
638
inc_c = inc_a & inc_b
640
for lineno, insert, deleteset, line in self._walk():
641
if deleteset & inc_c:
642
# killed in parent; can't be in either a or b
643
# not relevant to our work
644
yield 'killed-base', line
645
elif insert in inc_c:
646
# was inserted in base
647
killed_a = bool(deleteset & inc_a)
648
killed_b = bool(deleteset & inc_b)
649
if killed_a and killed_b:
650
yield 'killed-both', line
652
yield 'killed-a', line
654
yield 'killed-b', line
656
yield 'unchanged', line
657
elif insert in inc_a:
658
if deleteset & inc_a:
659
yield 'ghost-a', line
663
elif insert in inc_b:
664
if deleteset & inc_b:
665
yield 'ghost-b', line
669
# not in either revision
670
yield 'irrelevant', line
672
yield 'unchanged', '' # terminator
676
def weave_merge(self, plan):
681
for state, line in plan:
682
if state == 'unchanged' or state == 'killed-both':
683
# resync and flush queued conflicts changes if any
684
if not lines_a and not lines_b:
686
elif ch_a and not ch_b:
688
for l in lines_a: yield l
689
elif ch_b and not ch_a:
690
for l in lines_b: yield l
691
elif lines_a == lines_b:
692
for l in lines_a: yield l
695
for l in lines_a: yield l
697
for l in lines_b: yield l
704
if state == 'unchanged':
707
elif state == 'killed-a':
710
elif state == 'killed-b':
713
elif state == 'new-a':
716
elif state == 'new-b':
720
assert state in ('irrelevant', 'ghost-a', 'ghost-b', 'killed-base',
731
"""Show the weave's table-of-contents"""
732
print '%6s %50s %10s %10s' % ('ver', 'name', 'sha1', 'parents')
733
for i in (6, 50, 10, 10):
736
for i in range(w.numversions()):
739
parent_str = ' '.join(map(str, w._parents[i]))
740
print '%6d %-50.50s %10.10s %s' % (i, name, sha1, parent_str)
744
def weave_stats(weave_file):
745
from bzrlib.progress import ProgressBar
746
from bzrlib.weavefile import read_weave
750
wf = file(weave_file, 'rb')
752
# FIXME: doesn't work on pipes
753
weave_size = wf.tell()
757
for i in range(vers):
758
pb.update('checking sizes', i, vers)
759
for line in w.get_iter(i):
764
print 'versions %9d' % vers
765
print 'weave file %9d bytes' % weave_size
766
print 'total contents %9d bytes' % total
767
print 'compression ratio %9.2fx' % (float(total) / float(weave_size))
770
print 'average size %9d bytes' % avg
771
print 'relative size %9.2fx' % (float(weave_size) / float(avg))
775
print """bzr weave tool
777
Experimental tool for weave algorithm.
781
Create an empty weave file
782
weave get WEAVEFILE VERSION
783
Write out specified version.
784
weave check WEAVEFILE
785
Check consistency of all versions.
787
Display table of contents.
788
weave add WEAVEFILE NAME [BASE...] < NEWTEXT
789
Add NEWTEXT, with specified parent versions.
790
weave annotate WEAVEFILE VERSION
791
Display origin of each line.
792
weave mash WEAVEFILE VERSION...
793
Display composite of all selected versions.
794
weave merge WEAVEFILE VERSION1 VERSION2 > OUT
795
Auto-merge two versions and display conflicts.
799
% weave init foo.weave
801
% weave add foo.weave ver0 < foo.txt
804
(create updated version)
806
% weave get foo.weave 0 | diff -u - foo.txt
807
% weave add foo.weave ver1 0 < foo.txt
810
% weave get foo.weave 0 > foo.txt (create forked version)
812
% weave add foo.weave ver2 0 < foo.txt
815
% weave merge foo.weave 1 2 > foo.txt (merge them)
816
% vi foo.txt (resolve conflicts)
817
% weave add foo.weave merged 1 2 < foo.txt (commit merged version)
826
from weavefile import write_weave, read_weave
827
from bzrlib.progress import ProgressBar
842
return read_weave(file(argv[2], 'rb'))
848
# at the moment, based on everything in the file
850
parents = map(int, argv[4:])
851
lines = sys.stdin.readlines()
852
ver = w.add(name, parents, lines)
853
write_weave(w, file(argv[2], 'wb'))
854
print 'added version %r %d' % (name, ver)
857
if os.path.exists(fn):
858
raise IOError("file exists")
860
write_weave(w, file(fn, 'wb'))
861
elif cmd == 'get': # get one version
863
sys.stdout.writelines(w.get_iter(int(argv[3])))
865
elif cmd == 'mash': # get composite
867
sys.stdout.writelines(w.mash_iter(map(int, argv[3:])))
869
elif cmd == 'annotate':
871
# newline is added to all lines regardless; too hard to get
872
# reasonable formatting otherwise
874
for origin, text in w.annotate(int(argv[3])):
875
text = text.rstrip('\r\n')
877
print ' | %s' % (text)
879
print '%5d | %s' % (origin, text)
893
print '%d versions ok' % w.numversions()
895
elif cmd == 'inclusions':
897
print ' '.join(map(str, w.inclusions([int(argv[3])])))
899
elif cmd == 'parents':
901
print ' '.join(map(str, w._parents[int(argv[3])]))
903
elif cmd == 'plan-merge':
905
for state, line in w.plan_merge(int(argv[3]), int(argv[4])):
907
print '%14s | %s' % (state, line),
911
p = w.plan_merge(int(argv[3]), int(argv[4]))
912
sys.stdout.writelines(w.weave_merge(p))
914
elif cmd == 'mash-merge':
920
v1, v2 = map(int, argv[3:5])
922
basis = w.inclusions([v1]).intersection(w.inclusions([v2]))
924
base_lines = list(w.mash_iter(basis))
925
a_lines = list(w.get(v1))
926
b_lines = list(w.get(v2))
928
from bzrlib.merge3 import Merge3
929
m3 = Merge3(base_lines, a_lines, b_lines)
931
name_a = 'version %d' % v1
932
name_b = 'version %d' % v2
933
sys.stdout.writelines(m3.merge_lines(name_a=name_a, name_b=name_b))
935
raise ValueError('unknown command %r' % cmd)
939
def profile_main(argv):
940
import tempfile, hotshot, hotshot.stats
942
prof_f = tempfile.NamedTemporaryFile()
944
prof = hotshot.Profile(prof_f.name)
946
ret = prof.runcall(main, argv)
949
stats = hotshot.stats.load(prof_f.name)
951
stats.sort_stats('cumulative')
952
## XXX: Might like to write to stderr or the trace file instead but
953
## print_stats seems hardcoded to stdout
954
stats.print_stats(20)
959
if __name__ == '__main__':
961
if '--profile' in sys.argv:
963
args.remove('--profile')
964
sys.exit(profile_main(args))
966
sys.exit(main(sys.argv))
856
def _imported_parents(self, other, other_idx):
857
"""Return list of parents in self corresponding to indexes in other."""
859
for parent_idx in other._parents[other_idx]:
860
parent_name = other._names[parent_idx]
861
if parent_name not in self._name_map:
862
# should not be possible
863
raise WeaveError("missing parent {%s} of {%s} in %r"
864
% (parent_name, other._name_map[other_idx], self))
865
new_parents.append(self._name_map[parent_name])
868
def _check_version_consistent(self, other, other_idx, name):
869
"""Check if a version in consistent in this and other.
871
To be consistent it must have:
874
* the same direct parents (by name, not index, and disregarding
877
If present & correct return True;
878
if not present in self return False;
879
if inconsistent raise error."""
880
this_idx = self._name_map.get(name, -1)
882
if self._sha1s[this_idx] != other._sha1s[other_idx]:
883
raise errors.WeaveTextDiffers(name, self, other)
884
self_parents = self._parents[this_idx]
885
other_parents = other._parents[other_idx]
886
n1 = set([self._names[i] for i in self_parents])
887
n2 = set([other._names[i] for i in other_parents])
888
if not self._compatible_parents(n1, n2):
889
raise WeaveParentMismatch("inconsistent parents "
890
"for version {%s}: %s vs %s" % (name, n1, n2))
896
def _reweave(self, other, pb, msg):
897
"""Reweave self with other - internal helper for join().
899
:param other: The other weave to merge
900
:param pb: An optional progress bar, indicating how far done we are
901
:param msg: An optional message for the progress
903
new_weave = _reweave(self, other, pb=pb, msg=msg)
904
self._copy_weave_content(new_weave)
906
def _copy_weave_content(self, otherweave):
907
"""adsorb the content from otherweave."""
908
for attr in self.__slots__:
909
if attr != '_weave_name':
910
setattr(self, attr, copy(getattr(otherweave, attr)))
913
class WeaveFile(Weave):
914
"""A WeaveFile represents a Weave on disk and writes on change."""
916
WEAVE_SUFFIX = '.weave'
918
def __init__(self, name, transport, filemode=None, create=False, access_mode='w', get_scope=None):
919
"""Create a WeaveFile.
921
:param create: If not True, only open an existing knit.
923
super(WeaveFile, self).__init__(name, access_mode, get_scope=get_scope,
924
allow_reserved=False)
925
self._transport = transport
926
self._filemode = filemode
928
_read_weave_v5(self._transport.get(name + WeaveFile.WEAVE_SUFFIX), self)
929
except errors.NoSuchFile:
935
def _add_lines(self, version_id, parents, lines, parent_texts,
936
left_matching_blocks, nostore_sha, random_id, check_content):
937
"""Add a version and save the weave."""
938
self.check_not_reserved_id(version_id)
939
result = super(WeaveFile, self)._add_lines(version_id, parents, lines,
940
parent_texts, left_matching_blocks, nostore_sha, random_id,
945
def copy_to(self, name, transport):
946
"""See VersionedFile.copy_to()."""
947
# as we are all in memory always, just serialise to the new place.
949
write_weave_v5(self, sio)
951
transport.put_file(name + WeaveFile.WEAVE_SUFFIX, sio, self._filemode)
954
"""Save the weave."""
955
self._check_write_ok()
957
write_weave_v5(self, sio)
959
bytes = sio.getvalue()
960
path = self._weave_name + WeaveFile.WEAVE_SUFFIX
962
self._transport.put_bytes(path, bytes, self._filemode)
963
except errors.NoSuchFile:
964
self._transport.mkdir(dirname(path))
965
self._transport.put_bytes(path, bytes, self._filemode)
969
"""See VersionedFile.get_suffixes()."""
970
return [WeaveFile.WEAVE_SUFFIX]
972
def insert_record_stream(self, stream):
973
super(WeaveFile, self).insert_record_stream(stream)
977
def _reweave(wa, wb, pb=None, msg=None):
978
"""Combine two weaves and return the result.
980
This works even if a revision R has different parents in
981
wa and wb. In the resulting weave all the parents are given.
983
This is done by just building up a new weave, maintaining ordering
984
of the versions in the two inputs. More efficient approaches
985
might be possible but it should only be necessary to do
986
this operation rarely, when a new previously ghost version is
989
:param pb: An optional progress bar, indicating how far done we are
990
:param msg: An optional message for the progress
994
queue_a = range(wa.num_versions())
995
queue_b = range(wb.num_versions())
996
# first determine combined parents of all versions
997
# map from version name -> all parent names
998
combined_parents = _reweave_parent_graphs(wa, wb)
999
mutter("combined parents: %r", combined_parents)
1000
order = tsort.topo_sort(combined_parents.iteritems())
1001
mutter("order to reweave: %r", order)
1006
for idx, name in enumerate(order):
1008
pb.update(msg, idx, len(order))
1009
if name in wa._name_map:
1010
lines = wa.get_lines(name)
1011
if name in wb._name_map:
1012
lines_b = wb.get_lines(name)
1013
if lines != lines_b:
1014
mutter('Weaves differ on content. rev_id {%s}', name)
1015
mutter('weaves: %s, %s', wa._weave_name, wb._weave_name)
1017
lines = list(difflib.unified_diff(lines, lines_b,
1018
wa._weave_name, wb._weave_name))
1019
mutter('lines:\n%s', ''.join(lines))
1020
raise errors.WeaveTextDiffers(name, wa, wb)
1022
lines = wb.get_lines(name)
1023
wr._add(name, lines, [wr._lookup(i) for i in combined_parents[name]])
1027
def _reweave_parent_graphs(wa, wb):
1028
"""Return combined parent ancestry for two weaves.
1030
Returned as a list of (version_name, set(parent_names))"""
1032
for weave in [wa, wb]:
1033
for idx, name in enumerate(weave._names):
1034
p = combined.setdefault(name, set())
1035
p.update(map(weave._idx_to_name, weave._parents[idx]))