71
69
from copy import copy
72
70
from cStringIO import StringIO
73
from bzrlib.lazy_import import lazy_import
74
lazy_import(globals(), """
75
from bzrlib import tsort
78
77
from bzrlib import (
81
from bzrlib.trace import mutter
82
81
from bzrlib.errors import (WeaveError, WeaveFormatError, WeaveParentMismatch,
83
82
RevisionAlreadyPresent,
84
83
RevisionNotPresent,
85
WeaveRevisionAlreadyPresent,
86
WeaveRevisionNotPresent,
84
UnavailableRepresentation,
88
import bzrlib.errors as errors
89
from bzrlib.osutils import sha_strings
86
from bzrlib.osutils import dirname, sha, sha_strings, split_lines
90
87
import bzrlib.patiencediff
91
from bzrlib.symbol_versioning import (deprecated_method,
95
from bzrlib.tsort import topo_sort
96
from bzrlib.versionedfile import VersionedFile, InterVersionedFile
88
from bzrlib.revision import NULL_REVISION
89
from bzrlib.symbol_versioning import *
90
from bzrlib.trace import mutter
91
from bzrlib.versionedfile import (
97
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')
100
126
class Weave(VersionedFile):
101
127
"""weave - versioned text file storage.
103
129
A Weave manages versions of line-based text files, keeping track
104
130
of the originating version for each line.
274
297
__contains__ = has_version
276
def get_delta(self, version_id):
277
"""See VersionedFile.get_delta."""
278
return self.get_deltas([version_id])[version_id]
280
def get_deltas(self, version_ids):
281
"""See VersionedFile.get_deltas."""
282
version_ids = self.get_ancestry(version_ids)
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."""
283
332
for version_id in version_ids:
284
if not self.has_version(version_id):
285
raise RevisionNotPresent(version_id, self)
286
# try extracting all versions; parallel extraction is used
287
nv = self.num_versions()
293
last_parent_lines = {}
295
parent_inclusions = {}
300
# its simplest to generate a full set of prepared variables.
302
name = self._names[i]
303
sha1s[name] = self.get_sha1(name)
304
parents_list = self.get_parents(name)
306
parent = parents_list[0]
307
parents[name] = parent
308
parent_inclusions[name] = inclusions[parent]
311
parent_inclusions[name] = set()
312
# we want to emit start, finish, replacement_length, replacement_lines tuples.
313
diff_hunks[name] = []
314
current_hunks[name] = [0, 0, 0, []] # #start, finish, repl_length, repl_tuples
315
parent_linenums[name] = 0
317
parent_noeols[name] = False
318
last_parent_lines[name] = None
319
new_inc = set([name])
320
for p in self._parents[i]:
321
new_inc.update(inclusions[self._idx_to_name(p)])
322
# debug only, known good so far.
323
#assert set(new_inc) == set(self.get_ancestry(name)), \
324
# 'failed %s != %s' % (set(new_inc), set(self.get_ancestry(name)))
325
inclusions[name] = new_inc
327
nlines = len(self._weave)
329
for lineno, inserted, deletes, line in self._walk_internal():
330
# a line is active in a version if:
331
# insert is in the versions inclusions
333
# deleteset & the versions inclusions is an empty set.
334
# so - if we have a included by mapping - version is included by
335
# children, we get a list of children to examine for deletes affect
336
# ing them, which is less than the entire set of children.
337
for version_id in version_ids:
338
# The active inclusion must be an ancestor,
339
# and no ancestors must have deleted this line,
340
# because we don't support resurrection.
341
parent_inclusion = parent_inclusions[version_id]
342
inclusion = inclusions[version_id]
343
parent_active = inserted in parent_inclusion and not (deletes & parent_inclusion)
344
version_active = inserted in inclusion and not (deletes & inclusion)
345
if not parent_active and not version_active:
346
# unrelated line of ancestry
333
if version_id == NULL_REVISION:
338
map(self._idx_to_name,
339
self._parents[self._lookup(version_id)]))
340
except RevisionNotPresent:
348
elif parent_active and version_active:
350
parent_linenum = parent_linenums[version_id]
351
if current_hunks[version_id] != [parent_linenum, parent_linenum, 0, []]:
352
diff_hunks[version_id].append(tuple(current_hunks[version_id]))
354
current_hunks[version_id] = [parent_linenum, parent_linenum, 0, []]
355
parent_linenums[version_id] = parent_linenum
358
noeols[version_id] = True
361
elif parent_active and not version_active:
363
current_hunks[version_id][1] += 1
364
parent_linenums[version_id] += 1
365
last_parent_lines[version_id] = line
366
elif not parent_active and version_active:
368
# noeol only occurs at the end of a file because we
369
# diff linewise. We want to show noeol changes as a
370
# empty diff unless the actual eol-less content changed.
373
if last_parent_lines[version_id][-1] != '\n':
374
parent_noeols[version_id] = True
375
except (TypeError, IndexError):
378
if theline[-1] != '\n':
379
noeols[version_id] = True
383
parent_should_go = False
385
if parent_noeols[version_id] == noeols[version_id]:
386
# no noeol toggle, so trust the weaves statement
387
# that this line is changed.
389
if parent_noeols[version_id]:
390
theline = theline + '\n'
391
elif parent_noeols[version_id]:
392
# parent has no eol, we do:
393
# our line is new, report as such..
395
elif noeols[version_id]:
396
# append a eol so that it looks like
398
theline = theline + '\n'
399
if parents[version_id] is not None:
400
#if last_parent_lines[version_id] is not None:
401
parent_should_go = True
402
if last_parent_lines[version_id] != theline:
405
#parent_should_go = False
407
current_hunks[version_id][2] += 1
408
current_hunks[version_id][3].append((inserted, theline))
410
# last hunk last parent line is not eaten
411
current_hunks[version_id][1] -= 1
412
if current_hunks[version_id][1] < 0:
413
current_hunks[version_id][1] = 0
414
# import pdb;pdb.set_trace()
415
# assert current_hunks[version_id][1] >= 0
419
version = self._idx_to_name(i)
420
if current_hunks[version] != [0, 0, 0, []]:
421
diff_hunks[version].append(tuple(current_hunks[version]))
423
for version_id in version_ids:
424
result[version_id] = (
428
diff_hunks[version_id],
342
result[version_id] = parents
432
def get_parents(self, version_id):
433
"""See VersionedFile.get_parent."""
434
return map(self._idx_to_name, self._parents[self._lookup(version_id)])
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:
436
380
def _check_repeated_add(self, name, parents, text, sha1):
437
381
"""Check that a duplicated add is OK.
444
388
raise RevisionAlreadyPresent(name, self._weave_name)
447
@deprecated_method(zero_eight)
448
def add_identical(self, old_rev_id, new_rev_id, parents):
449
"""Please use Weave.clone_text now."""
450
return self.clone_text(new_rev_id, old_rev_id, parents)
452
def _add_lines(self, version_id, parents, lines, parent_texts):
391
def _add_lines(self, version_id, parents, lines, parent_texts,
392
left_matching_blocks, nostore_sha, random_id, check_content):
453
393
"""See VersionedFile.add_lines."""
454
return self._add(version_id, lines, map(self._lookup, parents))
456
@deprecated_method(zero_eight)
457
def add(self, name, parents, text, sha1=None):
458
"""See VersionedFile.add_lines for the non deprecated api."""
459
return self._add(name, text, map(self._maybe_lookup, parents), sha1)
461
def _add(self, version_id, lines, parents, sha1=None):
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):
462
399
"""Add a single text on top of the weave.
464
401
Returns the index number of the newly added version.
467
404
Symbolic name for this version.
468
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)
471
409
List or set of direct parent version numbers.
474
412
Sequence of lines to be added in the new version.
414
:param nostore_sha: See VersionedFile.add_lines.
477
assert isinstance(version_id, basestring)
478
416
self._check_lines_not_unicode(lines)
479
417
self._check_lines_are_lines(lines)
481
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
482
424
if version_id in self._name_map:
483
425
return self._check_repeated_add(version_id, parents, lines, sha1)
636
557
def _compatible_parents(self, my_parents, other_parents):
637
558
"""During join check that other_parents are joinable with my_parents.
639
Joinable is defined as 'is a subset of' - supersets may require
560
Joinable is defined as 'is a subset of' - supersets may require
640
561
regeneration of diffs, but subsets do not.
642
563
return len(other_parents.difference(my_parents)) == 0
644
565
def annotate(self, version_id):
645
if isinstance(version_id, int):
646
warnings.warn('Weave.annotate(int) is deprecated. Please use version names'
647
' in all circumstances as of 0.8',
652
for origin, lineno, text in self._extract([version_id]):
653
result.append((origin, text))
656
return super(Weave, self).annotate(version_id)
658
def annotate_iter(self, version_id):
659
"""Yield list of (version-id, line) pairs for the specified version.
566
"""Return a list of (version-id, line) tuples for version_id.
661
568
The index indicates when the line originated in the weave."""
662
569
incls = [self._lookup(version_id)]
663
for origin, lineno, text in self._extract(incls):
664
yield self._idx_to_name(origin), text
666
@deprecated_method(zero_eight)
668
"""_walk has become visit, a supported api."""
669
return self._walk_internal()
570
return [(self._idx_to_name(origin), text) for origin, lineno, text in
571
self._extract(incls)]
671
573
def iter_lines_added_or_present_in_versions(self, version_ids=None,
985
848
# no lines outside of insertion blocks, that deletions are
986
849
# properly paired, etc.
988
def _join(self, other, pb, msg, version_ids, ignore_missing):
989
"""Worker routine for join()."""
990
if not other.versions():
991
return # nothing to update, easy
994
# versions is never none, InterWeave checks this.
997
# two loops so that we do not change ourselves before verifying it
999
# work through in index order to make sure we get all dependencies
1002
# get the selected versions only that are in other.versions.
1003
version_ids = set(other.versions()).intersection(set(version_ids))
1004
# pull in the referenced graph.
1005
version_ids = other.get_ancestry(version_ids)
1006
pending_graph = [(version, other.get_parents(version)) for
1007
version in version_ids]
1008
for name in topo_sort(pending_graph):
1009
other_idx = other._name_map[name]
1010
# returns True if we have it, False if we need it.
1011
if not self._check_version_consistent(other, other_idx, name):
1012
names_to_join.append((other_idx, name))
1021
for other_idx, name in names_to_join:
1022
# TODO: If all the parents of the other version are already
1023
# present then we can avoid some work by just taking the delta
1024
# and adjusting the offsets.
1025
new_parents = self._imported_parents(other, other_idx)
1026
sha1 = other._sha1s[other_idx]
1031
pb.update(msg, merged, len(names_to_join))
1033
lines = other.get_lines(other_idx)
1034
self._add(name, lines, new_parents, sha1)
1036
mutter("merged = %d, processed = %d, file_id=%s; deltat=%d"%(
1037
merged, processed, self._weave_name, time.time()-time0))
1039
851
def _imported_parents(self, other, other_idx):
1040
852
"""Return list of parents in self corresponding to indexes in other."""
1041
853
new_parents = []
1102
909
"""A WeaveFile represents a Weave on disk and writes on change."""
1104
911
WEAVE_SUFFIX = '.weave'
1106
def __init__(self, name, transport, filemode=None, create=False, access_mode='w'):
913
def __init__(self, name, transport, filemode=None, create=False, access_mode='w', get_scope=None):
1107
914
"""Create a WeaveFile.
1109
916
:param create: If not True, only open an existing knit.
1111
super(WeaveFile, self).__init__(name, access_mode)
918
super(WeaveFile, self).__init__(name, access_mode, get_scope=get_scope,
919
allow_reserved=False)
1112
920
self._transport = transport
1113
921
self._filemode = filemode
1115
_read_weave_v5(self._transport.get(name + WeaveFile.WEAVE_SUFFIX), self)
923
f = self._transport.get(name + WeaveFile.WEAVE_SUFFIX)
924
_read_weave_v5(StringIO(f.read()), self)
1116
925
except errors.NoSuchFile:
1119
928
# new file, save it
1122
def _add_lines(self, version_id, parents, lines, parent_texts):
931
def _add_lines(self, version_id, parents, lines, parent_texts,
932
left_matching_blocks, nostore_sha, random_id, check_content):
1123
933
"""Add a version and save the weave."""
1124
934
self.check_not_reserved_id(version_id)
1125
935
result = super(WeaveFile, self)._add_lines(version_id, parents, lines,
936
parent_texts, left_matching_blocks, nostore_sha, random_id,
1130
def _clone_text(self, new_version_id, old_version_id, parents):
1131
"""See VersionedFile.clone_text."""
1132
super(WeaveFile, self)._clone_text(new_version_id, old_version_id, parents)
1135
941
def copy_to(self, name, transport):
1136
942
"""See VersionedFile.copy_to()."""
1137
943
# as we are all in memory always, just serialise to the new place.
1141
947
transport.put_file(name + WeaveFile.WEAVE_SUFFIX, sio, self._filemode)
1143
def create_empty(self, name, transport, filemode=None):
1144
return WeaveFile(name, transport, filemode, create=True)
1146
949
def _save(self):
1147
950
"""Save the weave."""
1148
951
self._check_write_ok()
1149
952
sio = StringIO()
1150
953
write_weave_v5(self, sio)
1152
self._transport.put_file(self._weave_name + WeaveFile.WEAVE_SUFFIX,
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)
1157
964
def get_suffixes():
1158
965
"""See VersionedFile.get_suffixes()."""
1159
966
return [WeaveFile.WEAVE_SUFFIX]
1161
def join(self, other, pb=None, msg=None, version_ids=None,
1162
ignore_missing=False):
1163
"""Join other into self and save."""
1164
super(WeaveFile, self).join(other, pb, msg, version_ids, ignore_missing)
968
def insert_record_stream(self, stream):
969
super(WeaveFile, self).insert_record_stream(stream)
1168
@deprecated_function(zero_eight)
1169
def reweave(wa, wb, pb=None, msg=None):
1170
"""reweaving is deprecation, please just use weave.join()."""
1171
_reweave(wa, wb, pb, msg)
1173
973
def _reweave(wa, wb, pb=None, msg=None):
1174
974
"""Combine two weaves and return the result.
1176
This works even if a revision R has different parents in
976
This works even if a revision R has different parents in
1177
977
wa and wb. In the resulting weave all the parents are given.
1179
This is done by just building up a new weave, maintaining ordering
979
This is done by just building up a new weave, maintaining ordering
1180
980
of the versions in the two inputs. More efficient approaches
1181
might be possible but it should only be necessary to do
1182
this operation rarely, when a new previously ghost version is
981
might be possible but it should only be necessary to do
982
this operation rarely, when a new previously ghost version is
1185
985
:param pb: An optional progress bar, indicating how far done we are
1229
1030
p = combined.setdefault(name, set())
1230
1031
p.update(map(weave._idx_to_name, weave._parents[idx]))
1231
1032
return combined
1235
"""Show the weave's table-of-contents"""
1236
print '%6s %50s %10s %10s' % ('ver', 'name', 'sha1', 'parents')
1237
for i in (6, 50, 10, 10):
1240
for i in range(w.num_versions()):
1243
parent_str = ' '.join(map(str, w._parents[i]))
1244
print '%6d %-50.50s %10.10s %s' % (i, name, sha1, parent_str)
1248
def weave_stats(weave_file, pb):
1249
from bzrlib.weavefile import read_weave
1251
wf = file(weave_file, 'rb')
1253
# FIXME: doesn't work on pipes
1254
weave_size = wf.tell()
1258
for i in range(vers):
1259
pb.update('checking sizes', i, vers)
1260
for origin, lineno, line in w._extract([i]):
1265
print 'versions %9d' % vers
1266
print 'weave file %9d bytes' % weave_size
1267
print 'total contents %9d bytes' % total
1268
print 'compression ratio %9.2fx' % (float(total) / float(weave_size))
1271
print 'average size %9d bytes' % avg
1272
print 'relative size %9.2fx' % (float(weave_size) / float(avg))
1276
print """bzr weave tool
1278
Experimental tool for weave algorithm.
1281
weave init WEAVEFILE
1282
Create an empty weave file
1283
weave get WEAVEFILE VERSION
1284
Write out specified version.
1285
weave check WEAVEFILE
1286
Check consistency of all versions.
1288
Display table of contents.
1289
weave add WEAVEFILE NAME [BASE...] < NEWTEXT
1290
Add NEWTEXT, with specified parent versions.
1291
weave annotate WEAVEFILE VERSION
1292
Display origin of each line.
1293
weave merge WEAVEFILE VERSION1 VERSION2 > OUT
1294
Auto-merge two versions and display conflicts.
1295
weave diff WEAVEFILE VERSION1 VERSION2
1296
Show differences between two versions.
1300
% weave init foo.weave
1302
% weave add foo.weave ver0 < foo.txt
1305
(create updated version)
1307
% weave get foo.weave 0 | diff -u - foo.txt
1308
% weave add foo.weave ver1 0 < foo.txt
1311
% weave get foo.weave 0 > foo.txt (create forked version)
1313
% weave add foo.weave ver2 0 < foo.txt
1316
% weave merge foo.weave 1 2 > foo.txt (merge them)
1317
% vi foo.txt (resolve conflicts)
1318
% weave add foo.weave merged 1 2 < foo.txt (commit merged version)
1330
# in case we're run directly from the subdirectory
1331
sys.path.append('..')
1333
from bzrlib.weavefile import write_weave, read_weave
1334
from bzrlib.progress import ProgressBar
1349
return read_weave(file(argv[2], 'rb'))
1355
# at the moment, based on everything in the file
1357
parents = map(int, argv[4:])
1358
lines = sys.stdin.readlines()
1359
ver = w.add(name, parents, lines)
1360
write_weave(w, file(argv[2], 'wb'))
1361
print 'added version %r %d' % (name, ver)
1364
if os.path.exists(fn):
1365
raise IOError("file exists")
1367
write_weave(w, file(fn, 'wb'))
1368
elif cmd == 'get': # get one version
1370
sys.stdout.writelines(w.get_iter(int(argv[3])))
1375
v1, v2 = map(int, argv[3:5])
1378
diff_gen = bzrlib.patiencediff.unified_diff(lines1, lines2,
1379
'%s version %d' % (fn, v1),
1380
'%s version %d' % (fn, v2))
1381
sys.stdout.writelines(diff_gen)
1383
elif cmd == 'annotate':
1385
# newline is added to all lines regardless; too hard to get
1386
# reasonable formatting otherwise
1388
for origin, text in w.annotate(int(argv[3])):
1389
text = text.rstrip('\r\n')
1391
print ' | %s' % (text)
1393
print '%5d | %s' % (origin, text)
1399
elif cmd == 'stats':
1400
weave_stats(argv[2], ProgressBar())
1402
elif cmd == 'check':
1407
print '%d versions ok' % w.num_versions()
1409
elif cmd == 'inclusions':
1411
print ' '.join(map(str, w.inclusions([int(argv[3])])))
1413
elif cmd == 'parents':
1415
print ' '.join(map(str, w._parents[int(argv[3])]))
1417
elif cmd == 'plan-merge':
1418
# replaced by 'bzr weave-plan-merge'
1420
for state, line in w.plan_merge(int(argv[3]), int(argv[4])):
1422
print '%14s | %s' % (state, line),
1423
elif cmd == 'merge':
1424
# replaced by 'bzr weave-merge-text'
1426
p = w.plan_merge(int(argv[3]), int(argv[4]))
1427
sys.stdout.writelines(w.weave_merge(p))
1429
raise ValueError('unknown command %r' % cmd)
1432
if __name__ == '__main__':
1434
sys.exit(main(sys.argv))
1437
class InterWeave(InterVersionedFile):
1438
"""Optimised code paths for weave to weave operations."""
1440
_matching_file_from_factory = staticmethod(WeaveFile)
1441
_matching_file_to_factory = staticmethod(WeaveFile)
1444
def is_compatible(source, target):
1445
"""Be compatible with weaves."""
1447
return (isinstance(source, Weave) and
1448
isinstance(target, Weave))
1449
except AttributeError:
1452
def join(self, pb=None, msg=None, version_ids=None, ignore_missing=False):
1453
"""See InterVersionedFile.join."""
1454
version_ids = self._get_source_version_ids(version_ids, ignore_missing)
1455
if self.target.versions() == [] and version_ids is None:
1456
self.target._copy_weave_content(self.source)
1459
self.target._join(self.source, pb, msg, version_ids, ignore_missing)
1460
except errors.WeaveParentMismatch:
1461
self.target._reweave(self.source, pb, msg)
1464
InterVersionedFile.register_optimiser(InterWeave)