61
59
# where the basis and destination are unchanged.
63
61
# FIXME: Sometimes we will be given a parents list for a revision
64
# that includes some redundant parents (i.e. already a parent of
65
# something in the list.) We should eliminate them. This can
62
# that includes some redundant parents (i.e. already a parent of
63
# something in the list.) We should eliminate them. This can
66
64
# be done fairly efficiently because the sequence numbers constrain
67
65
# the possible relationships.
71
from difflib import SequenceMatcher
67
# FIXME: the conflict markers should be *7* characters
70
from cStringIO import StringIO
73
from bzrlib.lazy_import import lazy_import
74
lazy_import(globals(), """
75
from bzrlib import tsort
81
from bzrlib.errors import (WeaveError, WeaveFormatError, WeaveParentMismatch,
82
RevisionAlreadyPresent,
84
UnavailableRepresentation,
86
from bzrlib.osutils import dirname, sha, sha_strings, split_lines
87
import bzrlib.patiencediff
88
from bzrlib.revision import NULL_REVISION
89
from bzrlib.symbol_versioning import *
73
90
from bzrlib.trace import mutter
74
from bzrlib.errors import WeaveError, WeaveFormatError, WeaveParentMismatch, \
75
WeaveRevisionNotPresent, WeaveRevisionAlreadyPresent
76
from bzrlib.tsort import topo_sort
91
from bzrlib.versionedfile import (
98
from bzrlib.weavefile import _read_weave_v5, write_weave_v5
101
class WeaveContentFactory(ContentFactory):
102
"""Content factory for streaming from weaves.
104
:seealso ContentFactory:
107
def __init__(self, version, weave):
108
"""Create a WeaveContentFactory for version from weave."""
109
ContentFactory.__init__(self)
110
self.sha1 = weave.get_sha1s([version])[version]
111
self.key = (version,)
112
parents = weave.get_parent_map([version])[version]
113
self.parents = tuple((parent,) for parent in parents)
114
self.storage_kind = 'fulltext'
117
def get_bytes_as(self, storage_kind):
118
if storage_kind == 'fulltext':
119
return self._weave.get_text(self.key[-1])
120
elif storage_kind == 'chunked':
121
return self._weave.get_lines(self.key[-1])
123
raise UnavailableRepresentation(self.key, storage_kind, 'fulltext')
126
class Weave(VersionedFile):
80
127
"""weave - versioned text file storage.
82
129
A Weave manages versions of line-based text files, keeping track
83
130
of the originating version for each line.
199
270
return self._parents == other._parents \
200
271
and self._weave == other._weave \
201
and self._sha1s == other._sha1s
272
and self._sha1s == other._sha1s
204
274
def __ne__(self, other):
205
275
return not self.__eq__(other)
207
def __contains__(self, name):
208
return self._name_map.has_key(name)
210
def maybe_lookup(self, name_or_index):
211
"""Convert possible symbolic name to index, or pass through indexes."""
212
if isinstance(name_or_index, (int, long)):
215
return self.lookup(name_or_index)
218
def lookup(self, name):
277
def _idx_to_name(self, version):
278
return self._names[version]
280
def _lookup(self, name):
219
281
"""Convert symbolic version name to index."""
282
if not self._allow_reserved:
283
self.check_not_reserved_id(name)
221
285
return self._name_map[name]
223
raise WeaveRevisionNotPresent(name, self)
287
raise RevisionNotPresent(name, self._weave_name)
290
"""See VersionedFile.versions."""
226
291
return self._names[:]
228
def iter_names(self):
229
"""Yield a list of all names in this weave."""
230
return iter(self._names)
232
def idx_to_name(self, version):
233
return self._names[version]
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:
235
380
def _check_repeated_add(self, name, parents, text, sha1):
236
381
"""Check that a duplicated add is OK.
238
383
If it is, return the (old) index; otherwise raise an exception.
240
idx = self.lookup(name)
385
idx = self._lookup(name)
241
386
if sorted(self._parents[idx]) != sorted(parents) \
242
387
or sha1 != self._sha1s[idx]:
243
raise WeaveRevisionAlreadyPresent(name, self)
388
raise RevisionAlreadyPresent(name, self._weave_name)
246
def add(self, name, parents, text, sha1=None):
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):
247
399
"""Add a single text on top of the weave.
249
401
Returns the index number of the newly added version.
252
404
Symbolic name for this version.
253
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)
256
409
List or set of direct parent version numbers.
259
412
Sequence of lines to be added in the new version.
261
sha -- SHA-1 of the file, if known. This is trusted to be
414
:param nostore_sha: See VersionedFile.add_lines.
264
from bzrlib.osutils import sha_strings
266
assert isinstance(name, basestring)
268
sha1 = sha_strings(text)
269
if name in self._name_map:
270
return self._check_repeated_add(name, parents, text, sha1)
272
parents = map(self.maybe_lookup, parents)
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)
273
427
self._check_versions(parents)
274
## self._check_lines(text)
428
## self._check_lines(lines)
275
429
new_version = len(self._parents)
278
431
# if we abort after here the (in-memory) weave will be corrupt because only
279
432
# some fields are updated
433
# XXX: FIXME implement a succeed-or-fail of the rest of this routine.
434
# - Robert Collins 20060226
280
435
self._parents.append(parents[:])
281
436
self._sha1s.append(sha1)
282
self._names.append(name)
283
self._name_map[name] = new_version
437
self._names.append(version_id)
438
self._name_map[version_id] = new_version
287
442
# special case; adding with no parents revision; can do
288
443
# this more quickly by just appending unconditionally.
289
444
# even more specially, if we're adding an empty text we
290
445
# need do nothing at all.
292
447
self._weave.append(('{', new_version))
293
self._weave.extend(text)
448
self._weave.extend(lines)
294
449
self._weave.append(('}', None))
296
450
return new_version
298
452
if len(parents) == 1:
436
554
except IndexError:
437
555
raise IndexError("invalid version number %r" % i)
440
def annotate(self, name_or_index):
441
return list(self.annotate_iter(name_or_index))
444
def annotate_iter(self, name_or_index):
445
"""Yield list of (index-id, line) pairs for the specified version.
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.
447
568
The index indicates when the line originated in the weave."""
448
incls = [self.maybe_lookup(name_or_index)]
449
for origin, lineno, text in self._extract(incls):
456
(lineno, insert, deletes, text)
457
for each literal line.
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."""
463
592
lineno = 0 # line of weave, 0-based
465
594
for l in self._weave:
466
if isinstance(l, tuple):
595
if l.__class__ == tuple:
599
istack.append(self._names[v])
603
dset.add(self._names[v])
605
dset.remove(self._names[v])
479
607
raise WeaveFormatError('unexpected instruction %r' % v)
481
assert isinstance(l, basestring)
483
yield lineno, istack[-1], dset, l
609
yield lineno, istack[-1], frozenset(dset), l
613
raise WeaveFormatError("unclosed insertion blocks "
614
"at end of weave: %s" % istack)
616
raise WeaveFormatError("unclosed deletion blocks at end of weave: %s"
619
def plan_merge(self, ver_a, ver_b):
620
"""Return pseudo-annotation indicating how the two versions merge.
622
This is computed between versions a and b and their common
625
Weave lines present in none of them are skipped entirely.
627
inc_a = set(self.get_ancestry([ver_a]))
628
inc_b = set(self.get_ancestry([ver_b]))
629
inc_c = inc_a & inc_b
631
for lineno, insert, deleteset, line in self._walk_internal([ver_a, ver_b]):
632
if deleteset & inc_c:
633
# killed in parent; can't be in either a or b
634
# not relevant to our work
635
yield 'killed-base', line
636
elif insert in inc_c:
637
# was inserted in base
638
killed_a = bool(deleteset & inc_a)
639
killed_b = bool(deleteset & inc_b)
640
if killed_a and killed_b:
641
yield 'killed-both', line
643
yield 'killed-a', line
645
yield 'killed-b', line
647
yield 'unchanged', line
648
elif insert in inc_a:
649
if deleteset & inc_a:
650
yield 'ghost-a', line
654
elif insert in inc_b:
655
if deleteset & inc_b:
656
yield 'ghost-b', line
660
# not in either revision
661
yield 'irrelevant', line
488
663
def _extract(self, versions):
489
664
"""Yield annotation of lines in included set.
548
def get_iter(self, name_or_index):
549
"""Yield lines for the specified version."""
550
incls = [self.maybe_lookup(name_or_index)]
551
for origin, lineno, line in self._extract(incls):
555
def get_text(self, name_or_index):
556
return ''.join(self.get_iter(name_or_index))
557
assert isinstance(version, int)
560
def get_lines(self, name_or_index):
561
return list(self.get_iter(name_or_index))
567
def mash_iter(self, included):
568
"""Return composed version of multiple included versions."""
569
included = map(self.maybe_lookup, included)
570
for origin, lineno, text in self._extract(included):
574
def dump(self, to_file):
575
from pprint import pprint
576
print >>to_file, "Weave._weave = ",
577
pprint(self._weave, to_file)
578
print >>to_file, "Weave._parents = ",
579
pprint(self._parents, to_file)
583
def numversions(self):
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?"""
584
780
l = len(self._parents)
585
assert l == len(self._sha1s)
590
return self.numversions()
783
__len__ = num_versions
593
785
def check(self, progress_bar=None):
594
# check no circular inclusions
595
for version in range(self.numversions()):
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()):
596
790
inclusions = list(self._parents[version])
598
792
inclusions.sort()
600
794
raise WeaveFormatError("invalid included version %d for index %d"
601
795
% (inclusions[-1], version))
603
# try extracting all versions; this is a bit slow and parallel
604
# extraction could be used
605
nv = self.numversions()
606
for version in range(nv):
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():
608
progress_bar.update('checking text', version, nv)
610
for l in self.get_iter(version):
613
expected = self._sha1s[version]
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]
614
841
if hd != expected:
615
raise WeaveError("mismatched sha1 for version %d; "
616
"got %s, expected %s"
617
% (version, hd, expected))
842
raise errors.WeaveInvalidChecksum(
843
"mismatched sha1 for version %s: "
844
"got %s, expected %s"
845
% (version, hd, expected))
619
847
# TODO: check insertions are properly nested, that there are
620
848
# no lines outside of insertion blocks, that deletions are
621
849
# properly paired, etc.
625
def merge(self, merge_versions):
626
"""Automerge and mark conflicts between versions.
628
This returns a sequence, each entry describing alternatives
629
for a chunk of the file. Each of the alternatives is given as
632
If there is a chunk of the file where there's no diagreement,
633
only one alternative is given.
635
# approach: find the included versions common to all the
637
raise NotImplementedError()
641
def _delta(self, included, lines):
642
"""Return changes from basis to new revision.
644
The old text for comparison is the union of included revisions.
646
This is used in inserting a new text.
648
Delta is returned as a sequence of
649
(weave1, weave2, newlines).
651
This indicates that weave1:weave2 of the old weave should be
652
replaced by the sequence of lines in newlines. Note that
653
these line numbers are positions in the total weave and don't
654
correspond to the lines in any extracted version, or even the
655
extracted union of included versions.
657
If line1=line2, this is a pure insert; if newlines=[] this is a
658
pure delete. (Similar to difflib.)
660
raise NotImplementedError()
663
def plan_merge(self, ver_a, ver_b):
664
"""Return pseudo-annotation indicating how the two versions merge.
666
This is computed between versions a and b and their common
669
Weave lines present in none of them are skipped entirely.
671
inc_a = self.inclusions([ver_a])
672
inc_b = self.inclusions([ver_b])
673
inc_c = inc_a & inc_b
675
for lineno, insert, deleteset, line in self._walk():
676
if deleteset & inc_c:
677
# killed in parent; can't be in either a or b
678
# not relevant to our work
679
yield 'killed-base', line
680
elif insert in inc_c:
681
# was inserted in base
682
killed_a = bool(deleteset & inc_a)
683
killed_b = bool(deleteset & inc_b)
684
if killed_a and killed_b:
685
yield 'killed-both', line
687
yield 'killed-a', line
689
yield 'killed-b', line
691
yield 'unchanged', line
692
elif insert in inc_a:
693
if deleteset & inc_a:
694
yield 'ghost-a', line
698
elif insert in inc_b:
699
if deleteset & inc_b:
700
yield 'ghost-b', line
704
# not in either revision
705
yield 'irrelevant', line
707
yield 'unchanged', '' # terminator
711
def weave_merge(self, plan):
716
for state, line in plan:
717
if state == 'unchanged' or state == 'killed-both':
718
# resync and flush queued conflicts changes if any
719
if not lines_a and not lines_b:
721
elif ch_a and not ch_b:
723
for l in lines_a: yield l
724
elif ch_b and not ch_a:
725
for l in lines_b: yield l
726
elif lines_a == lines_b:
727
for l in lines_a: yield l
730
for l in lines_a: yield l
732
for l in lines_b: yield l
739
if state == 'unchanged':
742
elif state == 'killed-a':
745
elif state == 'killed-b':
748
elif state == 'new-a':
751
elif state == 'new-b':
755
assert state in ('irrelevant', 'ghost-a', 'ghost-b', 'killed-base',
760
def join(self, other):
761
"""Integrate versions from other into this weave.
763
The resulting weave contains all the history of both weaves;
764
any version you could retrieve from either self or other can be
765
retrieved from self after this call.
767
It is illegal for the two weaves to contain different values
768
or different parents for any version. See also reweave().
770
if other.numversions() == 0:
771
return # nothing to update, easy
772
# two loops so that we do not change ourselves before verifying it
774
# work through in index order to make sure we get all dependencies
775
for other_idx, name in enumerate(other._names):
776
if self._check_version_consistent(other, other_idx, name):
778
for other_idx, name in enumerate(other._names):
779
# TODO: If all the parents of the other version are already
780
# present then we can avoid some work by just taking the delta
781
# and adjusting the offsets.
782
new_parents = self._imported_parents(other, other_idx)
783
lines = other.get_lines(other_idx)
784
sha1 = other._sha1s[other_idx]
785
self.add(name, new_parents, lines, sha1)
788
851
def _imported_parents(self, other, other_idx):
789
852
"""Return list of parents in self corresponding to indexes in other."""
791
854
for parent_idx in other._parents[other_idx]:
792
855
parent_name = other._names[parent_idx]
793
if parent_name not in self._names:
856
if parent_name not in self._name_map:
794
857
# should not be possible
795
raise WeaveError("missing parent {%s} of {%s} in %r"
858
raise WeaveError("missing parent {%s} of {%s} in %r"
796
859
% (parent_name, other._name_map[other_idx], self))
797
860
new_parents.append(self._name_map[parent_name])
798
861
return new_parents
832
def reweave(self, other):
833
"""Reweave self with other."""
834
new_weave = reweave(self, other)
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."""
835
903
for attr in self.__slots__:
836
setattr(self, attr, getattr(new_weave, attr))
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
_read_weave_v5(self._transport.get(name + WeaveFile.WEAVE_SUFFIX), self)
924
except errors.NoSuchFile:
930
def _add_lines(self, version_id, parents, lines, parent_texts,
931
left_matching_blocks, nostore_sha, random_id, check_content):
932
"""Add a version and save the weave."""
933
self.check_not_reserved_id(version_id)
934
result = super(WeaveFile, self)._add_lines(version_id, parents, lines,
935
parent_texts, left_matching_blocks, nostore_sha, random_id,
940
def copy_to(self, name, transport):
941
"""See VersionedFile.copy_to()."""
942
# as we are all in memory always, just serialise to the new place.
944
write_weave_v5(self, sio)
946
transport.put_file(name + WeaveFile.WEAVE_SUFFIX, sio, self._filemode)
949
"""Save the weave."""
950
self._check_write_ok()
952
write_weave_v5(self, sio)
954
bytes = sio.getvalue()
955
path = self._weave_name + WeaveFile.WEAVE_SUFFIX
957
self._transport.put_bytes(path, bytes, self._filemode)
958
except errors.NoSuchFile:
959
self._transport.mkdir(dirname(path))
960
self._transport.put_bytes(path, bytes, self._filemode)
964
"""See VersionedFile.get_suffixes()."""
965
return [WeaveFile.WEAVE_SUFFIX]
967
def insert_record_stream(self, stream):
968
super(WeaveFile, self).insert_record_stream(stream)
972
def _reweave(wa, wb, pb=None, msg=None):
840
973
"""Combine two weaves and return the result.
842
This works even if a revision R has different parents in
975
This works even if a revision R has different parents in
843
976
wa and wb. In the resulting weave all the parents are given.
845
This is done by just building up a new weave, maintaining ordering
978
This is done by just building up a new weave, maintaining ordering
846
979
of the versions in the two inputs. More efficient approaches
847
might be possible but it should only be necessary to do
848
this operation rarely, when a new previously ghost version is
980
might be possible but it should only be necessary to do
981
this operation rarely, when a new previously ghost version is
984
:param pb: An optional progress bar, indicating how far done we are
985
:param msg: An optional message for the progress
853
queue_a = range(wa.numversions())
854
queue_b = range(wb.numversions())
989
queue_a = range(wa.num_versions())
990
queue_b = range(wb.num_versions())
855
991
# first determine combined parents of all versions
856
992
# map from version name -> all parent names
857
993
combined_parents = _reweave_parent_graphs(wa, wb)
858
994
mutter("combined parents: %r", combined_parents)
859
order = topo_sort(combined_parents.iteritems())
995
order = tsort.topo_sort(combined_parents.iteritems())
860
996
mutter("order to reweave: %r", order)
1001
for idx, name in enumerate(order):
1003
pb.update(msg, idx, len(order))
862
1004
if name in wa._name_map:
863
1005
lines = wa.get_lines(name)
864
1006
if name in wb._name_map:
865
assert lines == wb.get_lines(name)
1007
lines_b = wb.get_lines(name)
1008
if lines != lines_b:
1009
mutter('Weaves differ on content. rev_id {%s}', name)
1010
mutter('weaves: %s, %s', wa._weave_name, wb._weave_name)
1012
lines = list(difflib.unified_diff(lines, lines_b,
1013
wa._weave_name, wb._weave_name))
1014
mutter('lines:\n%s', ''.join(lines))
1015
raise errors.WeaveTextDiffers(name, wa, wb)
867
1017
lines = wb.get_lines(name)
868
wr.add(name, combined_parents[name], lines)
1018
wr._add(name, lines, [wr._lookup(i) for i in combined_parents[name]])
872
1022
def _reweave_parent_graphs(wa, wb):
873
1023
"""Return combined parent ancestry for two weaves.
875
1025
Returned as a list of (version_name, set(parent_names))"""
877
1027
for weave in [wa, wb]:
878
1028
for idx, name in enumerate(weave._names):
879
1029
p = combined.setdefault(name, set())
880
p.update(map(weave.idx_to_name, weave._parents[idx]))
1030
p.update(map(weave._idx_to_name, weave._parents[idx]))
885
"""Show the weave's table-of-contents"""
886
print '%6s %50s %10s %10s' % ('ver', 'name', 'sha1', 'parents')
887
for i in (6, 50, 10, 10):
890
for i in range(w.numversions()):
893
parent_str = ' '.join(map(str, w._parents[i]))
894
print '%6d %-50.50s %10.10s %s' % (i, name, sha1, parent_str)
898
def weave_stats(weave_file, pb):
899
from bzrlib.weavefile import read_weave
901
wf = file(weave_file, 'rb')
903
# FIXME: doesn't work on pipes
904
weave_size = wf.tell()
908
for i in range(vers):
909
pb.update('checking sizes', i, vers)
910
for origin, lineno, line in w._extract([i]):
915
print 'versions %9d' % vers
916
print 'weave file %9d bytes' % weave_size
917
print 'total contents %9d bytes' % total
918
print 'compression ratio %9.2fx' % (float(total) / float(weave_size))
921
print 'average size %9d bytes' % avg
922
print 'relative size %9.2fx' % (float(weave_size) / float(avg))
926
print """bzr weave tool
928
Experimental tool for weave algorithm.
932
Create an empty weave file
933
weave get WEAVEFILE VERSION
934
Write out specified version.
935
weave check WEAVEFILE
936
Check consistency of all versions.
938
Display table of contents.
939
weave add WEAVEFILE NAME [BASE...] < NEWTEXT
940
Add NEWTEXT, with specified parent versions.
941
weave annotate WEAVEFILE VERSION
942
Display origin of each line.
943
weave mash WEAVEFILE VERSION...
944
Display composite of all selected versions.
945
weave merge WEAVEFILE VERSION1 VERSION2 > OUT
946
Auto-merge two versions and display conflicts.
947
weave diff WEAVEFILE VERSION1 VERSION2
948
Show differences between two versions.
952
% weave init foo.weave
954
% weave add foo.weave ver0 < foo.txt
957
(create updated version)
959
% weave get foo.weave 0 | diff -u - foo.txt
960
% weave add foo.weave ver1 0 < foo.txt
963
% weave get foo.weave 0 > foo.txt (create forked version)
965
% weave add foo.weave ver2 0 < foo.txt
968
% weave merge foo.weave 1 2 > foo.txt (merge them)
969
% vi foo.txt (resolve conflicts)
970
% weave add foo.weave merged 1 2 < foo.txt (commit merged version)
982
# in case we're run directly from the subdirectory
983
sys.path.append('..')
985
from bzrlib.weavefile import write_weave, read_weave
986
from bzrlib.progress import ProgressBar
1001
return read_weave(file(argv[2], 'rb'))
1007
# at the moment, based on everything in the file
1009
parents = map(int, argv[4:])
1010
lines = sys.stdin.readlines()
1011
ver = w.add(name, parents, lines)
1012
write_weave(w, file(argv[2], 'wb'))
1013
print 'added version %r %d' % (name, ver)
1016
if os.path.exists(fn):
1017
raise IOError("file exists")
1019
write_weave(w, file(fn, 'wb'))
1020
elif cmd == 'get': # get one version
1022
sys.stdout.writelines(w.get_iter(int(argv[3])))
1024
elif cmd == 'mash': # get composite
1026
sys.stdout.writelines(w.mash_iter(map(int, argv[3:])))
1029
from difflib import unified_diff
1032
v1, v2 = map(int, argv[3:5])
1035
diff_gen = unified_diff(lines1, lines2,
1036
'%s version %d' % (fn, v1),
1037
'%s version %d' % (fn, v2))
1038
sys.stdout.writelines(diff_gen)
1040
elif cmd == 'annotate':
1042
# newline is added to all lines regardless; too hard to get
1043
# reasonable formatting otherwise
1045
for origin, text in w.annotate(int(argv[3])):
1046
text = text.rstrip('\r\n')
1048
print ' | %s' % (text)
1050
print '%5d | %s' % (origin, text)
1056
elif cmd == 'stats':
1057
weave_stats(argv[2], ProgressBar())
1059
elif cmd == 'check':
1064
print '%d versions ok' % w.numversions()
1066
elif cmd == 'inclusions':
1068
print ' '.join(map(str, w.inclusions([int(argv[3])])))
1070
elif cmd == 'parents':
1072
print ' '.join(map(str, w._parents[int(argv[3])]))
1074
elif cmd == 'plan-merge':
1076
for state, line in w.plan_merge(int(argv[3]), int(argv[4])):
1078
print '%14s | %s' % (state, line),
1080
elif cmd == 'merge':
1082
p = w.plan_merge(int(argv[3]), int(argv[4]))
1083
sys.stdout.writelines(w.weave_merge(p))
1085
elif cmd == 'mash-merge':
1091
v1, v2 = map(int, argv[3:5])
1093
basis = w.inclusions([v1]).intersection(w.inclusions([v2]))
1095
base_lines = list(w.mash_iter(basis))
1096
a_lines = list(w.get(v1))
1097
b_lines = list(w.get(v2))
1099
from bzrlib.merge3 import Merge3
1100
m3 = Merge3(base_lines, a_lines, b_lines)
1102
name_a = 'version %d' % v1
1103
name_b = 'version %d' % v2
1104
sys.stdout.writelines(m3.merge_lines(name_a=name_a, name_b=name_b))
1106
raise ValueError('unknown command %r' % cmd)
1110
def profile_main(argv):
1111
import tempfile, hotshot, hotshot.stats
1113
prof_f = tempfile.NamedTemporaryFile()
1115
prof = hotshot.Profile(prof_f.name)
1117
ret = prof.runcall(main, argv)
1120
stats = hotshot.stats.load(prof_f.name)
1122
stats.sort_stats('cumulative')
1123
## XXX: Might like to write to stderr or the trace file instead but
1124
## print_stats seems hardcoded to stdout
1125
stats.print_stats(20)
1130
if __name__ == '__main__':
1132
if '--profile' in sys.argv:
1134
args.remove('--profile')
1135
sys.exit(profile_main(args))
1137
sys.exit(main(sys.argv))
added
removed
bzrlib/weave.py
