71
69
from copy import copy
72
70
from cStringIO import StringIO
75
from bzrlib.lazy_import import lazy_import
76
lazy_import(globals(), """
77
from bzrlib import tsort
78
79
from bzrlib import (
81
from bzrlib.trace import mutter
82
84
from bzrlib.errors import (WeaveError, WeaveFormatError, WeaveParentMismatch,
83
85
RevisionAlreadyPresent,
84
86
RevisionNotPresent,
87
UnavailableRepresentation,
85
88
WeaveRevisionAlreadyPresent,
86
89
WeaveRevisionNotPresent,
88
import bzrlib.errors as errors
89
from bzrlib.osutils import sha_strings
91
from bzrlib.osutils import dirname, sha, sha_strings, split_lines
90
92
import bzrlib.patiencediff
91
from bzrlib.tsort import topo_sort
92
from bzrlib.versionedfile import VersionedFile, InterVersionedFile
93
from bzrlib.revision import NULL_REVISION
94
from bzrlib.symbol_versioning import *
95
from bzrlib.trace import mutter
96
from bzrlib.versionedfile import (
93
103
from bzrlib.weavefile import _read_weave_v5, write_weave_v5
106
class WeaveContentFactory(ContentFactory):
107
"""Content factory for streaming from weaves.
109
:seealso ContentFactory:
112
def __init__(self, version, weave):
113
"""Create a WeaveContentFactory for version from weave."""
114
ContentFactory.__init__(self)
115
self.sha1 = weave.get_sha1s([version])[version]
116
self.key = (version,)
117
parents = weave.get_parent_map([version])[version]
118
self.parents = tuple((parent,) for parent in parents)
119
self.storage_kind = 'fulltext'
122
def get_bytes_as(self, storage_kind):
123
if storage_kind == 'fulltext':
124
return self._weave.get_text(self.key[-1])
125
elif storage_kind == 'chunked':
126
return self._weave.get_lines(self.key[-1])
128
raise UnavailableRepresentation(self.key, storage_kind, 'fulltext')
96
131
class Weave(VersionedFile):
97
132
"""weave - versioned text file storage.
99
134
A Weave manages versions of line-based text files, keeping track
100
135
of the originating version for each line.
246
302
__contains__ = has_version
248
def get_parents(self, version_id):
249
"""See VersionedFile.get_parent."""
250
return map(self._idx_to_name, self._parents[self._lookup(version_id)])
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:
252
385
def _check_repeated_add(self, name, parents, text, sha1):
253
386
"""Check that a duplicated add is OK.
270
403
def _add(self, version_id, lines, parents, sha1=None, nostore_sha=None):
271
404
"""Add a single text on top of the weave.
273
406
Returns the index number of the newly added version.
276
409
Symbolic name for this version.
277
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)
280
414
List or set of direct parent version numbers.
283
417
Sequence of lines to be added in the new version.
285
419
:param nostore_sha: See VersionedFile.add_lines.
287
assert isinstance(version_id, basestring)
288
421
self._check_lines_not_unicode(lines)
289
422
self._check_lines_are_lines(lines)
291
424
sha1 = sha_strings(lines)
292
425
if sha1 == nostore_sha:
293
426
raise errors.ExistingContent
427
if version_id is None:
428
version_id = "sha1:" + sha1
294
429
if version_id in self._name_map:
295
430
return self._check_repeated_add(version_id, parents, lines, sha1)
438
562
def _compatible_parents(self, my_parents, other_parents):
439
563
"""During join check that other_parents are joinable with my_parents.
441
Joinable is defined as 'is a subset of' - supersets may require
565
Joinable is defined as 'is a subset of' - supersets may require
442
566
regeneration of diffs, but subsets do not.
444
568
return len(other_parents.difference(my_parents)) == 0
446
def annotate_iter(self, version_id):
447
"""Yield list of (version-id, line) pairs for the specified version.
570
def annotate(self, version_id):
571
"""Return a list of (version-id, line) tuples for version_id.
449
573
The index indicates when the line originated in the weave."""
450
574
incls = [self._lookup(version_id)]
451
for origin, lineno, text in self._extract(incls):
452
yield self._idx_to_name(origin), text
575
return [(self._idx_to_name(origin), text) for origin, lineno, text in
576
self._extract(incls)]
454
578
def iter_lines_added_or_present_in_versions(self, version_ids=None,
588
704
# we're still spending ~1/4 of the method in isinstance though.
589
705
# so lets hard code the acceptable string classes we expect:
590
706
# 449 0 1202.9420 786.2930 bzrlib.weave:556(_extract)
591
# +71352 0 377.5560 377.5560 +<method 'append' of 'list'
707
# +71352 0 377.5560 377.5560 +<method 'append' of 'list'
593
709
# yay, down to ~1/4 the initial extract time, and our inline time
594
710
# has shrunk again, with isinstance no longer dominating.
595
711
# tweaking the stack inclusion test to use a set gives:
596
712
# 449 0 1122.8030 713.0080 bzrlib.weave:556(_extract)
597
# +71352 0 354.9980 354.9980 +<method 'append' of 'list'
713
# +71352 0 354.9980 354.9980 +<method 'append' of 'list'
599
715
# - a 5% win, or possibly just noise. However with large istacks that
600
716
# 'in' test could dominate, so I'm leaving this change in place -
601
717
# when its fast enough to consider profiling big datasets we can review.
606
722
for l in self._weave:
607
723
if l.__class__ == tuple:
615
730
iset.remove(istack.pop())
617
732
if v in included:
622
735
if v in included:
738
raise AssertionError()
626
assert l.__class__ in (str, unicode)
627
740
if isactive is None:
628
741
isactive = (not dset) and istack and (istack[-1] in included)
740
853
# no lines outside of insertion blocks, that deletions are
741
854
# properly paired, etc.
743
def _join(self, other, pb, msg, version_ids, ignore_missing):
744
"""Worker routine for join()."""
745
if not other.versions():
746
return # nothing to update, easy
749
# versions is never none, InterWeave checks this.
752
# two loops so that we do not change ourselves before verifying it
754
# work through in index order to make sure we get all dependencies
757
# get the selected versions only that are in other.versions.
758
version_ids = set(other.versions()).intersection(set(version_ids))
759
# pull in the referenced graph.
760
version_ids = other.get_ancestry(version_ids)
761
pending_graph = [(version, other.get_parents(version)) for
762
version in version_ids]
763
for name in topo_sort(pending_graph):
764
other_idx = other._name_map[name]
765
# returns True if we have it, False if we need it.
766
if not self._check_version_consistent(other, other_idx, name):
767
names_to_join.append((other_idx, name))
776
for other_idx, name in names_to_join:
777
# TODO: If all the parents of the other version are already
778
# present then we can avoid some work by just taking the delta
779
# and adjusting the offsets.
780
new_parents = self._imported_parents(other, other_idx)
781
sha1 = other._sha1s[other_idx]
786
pb.update(msg, merged, len(names_to_join))
788
lines = other.get_lines(other_idx)
789
self._add(name, lines, new_parents, sha1)
791
mutter("merged = %d, processed = %d, file_id=%s; deltat=%d"%(
792
merged, processed, self._weave_name, time.time()-time0))
794
856
def _imported_parents(self, other, other_idx):
795
857
"""Return list of parents in self corresponding to indexes in other."""
893
951
transport.put_file(name + WeaveFile.WEAVE_SUFFIX, sio, self._filemode)
895
def create_empty(self, name, transport, filemode=None):
896
return WeaveFile(name, transport, filemode, create=True)
899
954
"""Save the weave."""
900
955
self._check_write_ok()
902
957
write_weave_v5(self, sio)
904
self._transport.put_file(self._weave_name + WeaveFile.WEAVE_SUFFIX,
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)
909
968
def get_suffixes():
910
969
"""See VersionedFile.get_suffixes()."""
911
970
return [WeaveFile.WEAVE_SUFFIX]
913
def join(self, other, pb=None, msg=None, version_ids=None,
914
ignore_missing=False):
915
"""Join other into self and save."""
916
super(WeaveFile, self).join(other, pb, msg, version_ids, ignore_missing)
972
def insert_record_stream(self, stream):
973
super(WeaveFile, self).insert_record_stream(stream)
920
977
def _reweave(wa, wb, pb=None, msg=None):
921
978
"""Combine two weaves and return the result.
923
This works even if a revision R has different parents in
980
This works even if a revision R has different parents in
924
981
wa and wb. In the resulting weave all the parents are given.
926
This is done by just building up a new weave, maintaining ordering
983
This is done by just building up a new weave, maintaining ordering
927
984
of the versions in the two inputs. More efficient approaches
928
might be possible but it should only be necessary to do
929
this operation rarely, when a new previously ghost version is
985
might be possible but it should only be necessary to do
986
this operation rarely, when a new previously ghost version is
932
989
:param pb: An optional progress bar, indicating how far done we are
976
1034
p = combined.setdefault(name, set())
977
1035
p.update(map(weave._idx_to_name, weave._parents[idx]))
982
"""Show the weave's table-of-contents"""
983
print '%6s %50s %10s %10s' % ('ver', 'name', 'sha1', 'parents')
984
for i in (6, 50, 10, 10):
987
for i in range(w.num_versions()):
990
parent_str = ' '.join(map(str, w._parents[i]))
991
print '%6d %-50.50s %10.10s %s' % (i, name, sha1, parent_str)
995
def weave_stats(weave_file, pb):
996
from bzrlib.weavefile import read_weave
998
wf = file(weave_file, 'rb')
1000
# FIXME: doesn't work on pipes
1001
weave_size = wf.tell()
1005
for i in range(vers):
1006
pb.update('checking sizes', i, vers)
1007
for origin, lineno, line in w._extract([i]):
1012
print 'versions %9d' % vers
1013
print 'weave file %9d bytes' % weave_size
1014
print 'total contents %9d bytes' % total
1015
print 'compression ratio %9.2fx' % (float(total) / float(weave_size))
1018
print 'average size %9d bytes' % avg
1019
print 'relative size %9.2fx' % (float(weave_size) / float(avg))
1023
print """bzr weave tool
1025
Experimental tool for weave algorithm.
1028
weave init WEAVEFILE
1029
Create an empty weave file
1030
weave get WEAVEFILE VERSION
1031
Write out specified version.
1032
weave check WEAVEFILE
1033
Check consistency of all versions.
1035
Display table of contents.
1036
weave add WEAVEFILE NAME [BASE...] < NEWTEXT
1037
Add NEWTEXT, with specified parent versions.
1038
weave annotate WEAVEFILE VERSION
1039
Display origin of each line.
1040
weave merge WEAVEFILE VERSION1 VERSION2 > OUT
1041
Auto-merge two versions and display conflicts.
1042
weave diff WEAVEFILE VERSION1 VERSION2
1043
Show differences between two versions.
1047
% weave init foo.weave
1049
% weave add foo.weave ver0 < foo.txt
1052
(create updated version)
1054
% weave get foo.weave 0 | diff -u - foo.txt
1055
% weave add foo.weave ver1 0 < foo.txt
1058
% weave get foo.weave 0 > foo.txt (create forked version)
1060
% weave add foo.weave ver2 0 < foo.txt
1063
% weave merge foo.weave 1 2 > foo.txt (merge them)
1064
% vi foo.txt (resolve conflicts)
1065
% weave add foo.weave merged 1 2 < foo.txt (commit merged version)
1077
# in case we're run directly from the subdirectory
1078
sys.path.append('..')
1080
from bzrlib.weavefile import write_weave, read_weave
1081
from bzrlib.progress import ProgressBar
1096
return read_weave(file(argv[2], 'rb'))
1102
# at the moment, based on everything in the file
1104
parents = map(int, argv[4:])
1105
lines = sys.stdin.readlines()
1106
ver = w.add(name, parents, lines)
1107
write_weave(w, file(argv[2], 'wb'))
1108
print 'added version %r %d' % (name, ver)
1111
if os.path.exists(fn):
1112
raise IOError("file exists")
1114
write_weave(w, file(fn, 'wb'))
1115
elif cmd == 'get': # get one version
1117
sys.stdout.writelines(w.get_iter(int(argv[3])))
1122
v1, v2 = map(int, argv[3:5])
1125
diff_gen = bzrlib.patiencediff.unified_diff(lines1, lines2,
1126
'%s version %d' % (fn, v1),
1127
'%s version %d' % (fn, v2))
1128
sys.stdout.writelines(diff_gen)
1130
elif cmd == 'annotate':
1132
# newline is added to all lines regardless; too hard to get
1133
# reasonable formatting otherwise
1135
for origin, text in w.annotate(int(argv[3])):
1136
text = text.rstrip('\r\n')
1138
print ' | %s' % (text)
1140
print '%5d | %s' % (origin, text)
1146
elif cmd == 'stats':
1147
weave_stats(argv[2], ProgressBar())
1149
elif cmd == 'check':
1154
print '%d versions ok' % w.num_versions()
1156
elif cmd == 'inclusions':
1158
print ' '.join(map(str, w.inclusions([int(argv[3])])))
1160
elif cmd == 'parents':
1162
print ' '.join(map(str, w._parents[int(argv[3])]))
1164
elif cmd == 'plan-merge':
1165
# replaced by 'bzr weave-plan-merge'
1167
for state, line in w.plan_merge(int(argv[3]), int(argv[4])):
1169
print '%14s | %s' % (state, line),
1170
elif cmd == 'merge':
1171
# replaced by 'bzr weave-merge-text'
1173
p = w.plan_merge(int(argv[3]), int(argv[4]))
1174
sys.stdout.writelines(w.weave_merge(p))
1176
raise ValueError('unknown command %r' % cmd)
1179
if __name__ == '__main__':
1181
sys.exit(main(sys.argv))
1184
class InterWeave(InterVersionedFile):
1185
"""Optimised code paths for weave to weave operations."""
1187
_matching_file_from_factory = staticmethod(WeaveFile)
1188
_matching_file_to_factory = staticmethod(WeaveFile)
1191
def is_compatible(source, target):
1192
"""Be compatible with weaves."""
1194
return (isinstance(source, Weave) and
1195
isinstance(target, Weave))
1196
except AttributeError:
1199
def join(self, pb=None, msg=None, version_ids=None, ignore_missing=False):
1200
"""See InterVersionedFile.join."""
1201
version_ids = self._get_source_version_ids(version_ids, ignore_missing)
1202
if self.target.versions() == [] and version_ids is None:
1203
self.target._copy_weave_content(self.source)
1205
self.target._join(self.source, pb, msg, version_ids, ignore_missing)
1208
InterVersionedFile.register_optimiser(InterWeave)
added
removed
bzrlib/weave.py
