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_delta(self, version_id):
249
"""See VersionedFile.get_delta."""
250
return self.get_deltas([version_id])[version_id]
252
def get_deltas(self, version_ids):
253
"""See VersionedFile.get_deltas."""
254
version_ids = self.get_ancestry(version_ids)
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."""
255
337
for version_id in version_ids:
256
if not self.has_version(version_id):
257
raise RevisionNotPresent(version_id, self)
258
# try extracting all versions; parallel extraction is used
259
nv = self.num_versions()
265
last_parent_lines = {}
267
parent_inclusions = {}
272
# its simplest to generate a full set of prepared variables.
274
name = self._names[i]
275
sha1s[name] = self.get_sha1(name)
276
parents_list = self.get_parents(name)
278
parent = parents_list[0]
279
parents[name] = parent
280
parent_inclusions[name] = inclusions[parent]
283
parent_inclusions[name] = set()
284
# we want to emit start, finish, replacement_length, replacement_lines tuples.
285
diff_hunks[name] = []
286
current_hunks[name] = [0, 0, 0, []] # #start, finish, repl_length, repl_tuples
287
parent_linenums[name] = 0
289
parent_noeols[name] = False
290
last_parent_lines[name] = None
291
new_inc = set([name])
292
for p in self._parents[i]:
293
new_inc.update(inclusions[self._idx_to_name(p)])
294
# debug only, known good so far.
295
#assert set(new_inc) == set(self.get_ancestry(name)), \
296
# 'failed %s != %s' % (set(new_inc), set(self.get_ancestry(name)))
297
inclusions[name] = new_inc
299
nlines = len(self._weave)
301
for lineno, inserted, deletes, line in self._walk_internal():
302
# a line is active in a version if:
303
# insert is in the versions inclusions
305
# deleteset & the versions inclusions is an empty set.
306
# so - if we have a included by mapping - version is included by
307
# children, we get a list of children to examine for deletes affect
308
# ing them, which is less than the entire set of children.
309
for version_id in version_ids:
310
# The active inclusion must be an ancestor,
311
# and no ancestors must have deleted this line,
312
# because we don't support resurrection.
313
parent_inclusion = parent_inclusions[version_id]
314
inclusion = inclusions[version_id]
315
parent_active = inserted in parent_inclusion and not (deletes & parent_inclusion)
316
version_active = inserted in inclusion and not (deletes & inclusion)
317
if not parent_active and not version_active:
318
# unrelated line of ancestry
338
if version_id == NULL_REVISION:
343
map(self._idx_to_name,
344
self._parents[self._lookup(version_id)]))
345
except RevisionNotPresent:
320
elif parent_active and version_active:
322
parent_linenum = parent_linenums[version_id]
323
if current_hunks[version_id] != [parent_linenum, parent_linenum, 0, []]:
324
diff_hunks[version_id].append(tuple(current_hunks[version_id]))
326
current_hunks[version_id] = [parent_linenum, parent_linenum, 0, []]
327
parent_linenums[version_id] = parent_linenum
330
noeols[version_id] = True
333
elif parent_active and not version_active:
335
current_hunks[version_id][1] += 1
336
parent_linenums[version_id] += 1
337
last_parent_lines[version_id] = line
338
elif not parent_active and version_active:
340
# noeol only occurs at the end of a file because we
341
# diff linewise. We want to show noeol changes as a
342
# empty diff unless the actual eol-less content changed.
345
if last_parent_lines[version_id][-1] != '\n':
346
parent_noeols[version_id] = True
347
except (TypeError, IndexError):
350
if theline[-1] != '\n':
351
noeols[version_id] = True
355
parent_should_go = False
357
if parent_noeols[version_id] == noeols[version_id]:
358
# no noeol toggle, so trust the weaves statement
359
# that this line is changed.
361
if parent_noeols[version_id]:
362
theline = theline + '\n'
363
elif parent_noeols[version_id]:
364
# parent has no eol, we do:
365
# our line is new, report as such..
367
elif noeols[version_id]:
368
# append a eol so that it looks like
370
theline = theline + '\n'
371
if parents[version_id] is not None:
372
#if last_parent_lines[version_id] is not None:
373
parent_should_go = True
374
if last_parent_lines[version_id] != theline:
377
#parent_should_go = False
379
current_hunks[version_id][2] += 1
380
current_hunks[version_id][3].append((inserted, theline))
382
# last hunk last parent line is not eaten
383
current_hunks[version_id][1] -= 1
384
if current_hunks[version_id][1] < 0:
385
current_hunks[version_id][1] = 0
386
# import pdb;pdb.set_trace()
387
# assert current_hunks[version_id][1] >= 0
391
version = self._idx_to_name(i)
392
if current_hunks[version] != [0, 0, 0, []]:
393
diff_hunks[version].append(tuple(current_hunks[version]))
395
for version_id in version_ids:
396
result[version_id] = (
400
diff_hunks[version_id],
347
result[version_id] = parents
404
def get_parents(self, version_id):
405
"""See VersionedFile.get_parent."""
406
return map(self._idx_to_name, self._parents[self._lookup(version_id)])
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:
408
385
def _check_repeated_add(self, name, parents, text, sha1):
409
386
"""Check that a duplicated add is OK.
419
396
def _add_lines(self, version_id, parents, lines, parent_texts,
420
left_matching_blocks=None):
397
left_matching_blocks, nostore_sha, random_id, check_content):
421
398
"""See VersionedFile.add_lines."""
422
return self._add(version_id, lines, map(self._lookup, parents))
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
424
def _add(self, version_id, lines, parents, sha1=None):
403
def _add(self, version_id, lines, parents, sha1=None, nostore_sha=None):
425
404
"""Add a single text on top of the weave.
427
406
Returns the index number of the newly added version.
430
409
Symbolic name for this version.
431
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)
434
414
List or set of direct parent version numbers.
437
417
Sequence of lines to be added in the new version.
419
:param nostore_sha: See VersionedFile.add_lines.
440
assert isinstance(version_id, basestring)
441
421
self._check_lines_not_unicode(lines)
442
422
self._check_lines_are_lines(lines)
444
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
445
429
if version_id in self._name_map:
446
430
return self._check_repeated_add(version_id, parents, lines, sha1)
891
853
# no lines outside of insertion blocks, that deletions are
892
854
# properly paired, etc.
894
def _join(self, other, pb, msg, version_ids, ignore_missing):
895
"""Worker routine for join()."""
896
if not other.versions():
897
return # nothing to update, easy
900
# versions is never none, InterWeave checks this.
903
# two loops so that we do not change ourselves before verifying it
905
# work through in index order to make sure we get all dependencies
908
# get the selected versions only that are in other.versions.
909
version_ids = set(other.versions()).intersection(set(version_ids))
910
# pull in the referenced graph.
911
version_ids = other.get_ancestry(version_ids)
912
pending_graph = [(version, other.get_parents(version)) for
913
version in version_ids]
914
for name in topo_sort(pending_graph):
915
other_idx = other._name_map[name]
916
# returns True if we have it, False if we need it.
917
if not self._check_version_consistent(other, other_idx, name):
918
names_to_join.append((other_idx, name))
927
for other_idx, name in names_to_join:
928
# TODO: If all the parents of the other version are already
929
# present then we can avoid some work by just taking the delta
930
# and adjusting the offsets.
931
new_parents = self._imported_parents(other, other_idx)
932
sha1 = other._sha1s[other_idx]
937
pb.update(msg, merged, len(names_to_join))
939
lines = other.get_lines(other_idx)
940
self._add(name, lines, new_parents, sha1)
942
mutter("merged = %d, processed = %d, file_id=%s; deltat=%d"%(
943
merged, processed, self._weave_name, time.time()-time0))
945
856
def _imported_parents(self, other, other_idx):
946
857
"""Return list of parents in self corresponding to indexes in other."""
1043
951
transport.put_file(name + WeaveFile.WEAVE_SUFFIX, sio, self._filemode)
1045
def create_empty(self, name, transport, filemode=None):
1046
return WeaveFile(name, transport, filemode, create=True)
1048
953
def _save(self):
1049
954
"""Save the weave."""
1050
955
self._check_write_ok()
1051
956
sio = StringIO()
1052
957
write_weave_v5(self, sio)
1054
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)
1059
968
def get_suffixes():
1060
969
"""See VersionedFile.get_suffixes()."""
1061
970
return [WeaveFile.WEAVE_SUFFIX]
1063
def join(self, other, pb=None, msg=None, version_ids=None,
1064
ignore_missing=False):
1065
"""Join other into self and save."""
1066
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)
1070
977
def _reweave(wa, wb, pb=None, msg=None):
1071
978
"""Combine two weaves and return the result.
1073
This works even if a revision R has different parents in
980
This works even if a revision R has different parents in
1074
981
wa and wb. In the resulting weave all the parents are given.
1076
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
1077
984
of the versions in the two inputs. More efficient approaches
1078
might be possible but it should only be necessary to do
1079
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
1082
989
:param pb: An optional progress bar, indicating how far done we are
1126
1034
p = combined.setdefault(name, set())
1127
1035
p.update(map(weave._idx_to_name, weave._parents[idx]))
1128
1036
return combined
1132
"""Show the weave's table-of-contents"""
1133
print '%6s %50s %10s %10s' % ('ver', 'name', 'sha1', 'parents')
1134
for i in (6, 50, 10, 10):
1137
for i in range(w.num_versions()):
1140
parent_str = ' '.join(map(str, w._parents[i]))
1141
print '%6d %-50.50s %10.10s %s' % (i, name, sha1, parent_str)
1145
def weave_stats(weave_file, pb):
1146
from bzrlib.weavefile import read_weave
1148
wf = file(weave_file, 'rb')
1150
# FIXME: doesn't work on pipes
1151
weave_size = wf.tell()
1155
for i in range(vers):
1156
pb.update('checking sizes', i, vers)
1157
for origin, lineno, line in w._extract([i]):
1162
print 'versions %9d' % vers
1163
print 'weave file %9d bytes' % weave_size
1164
print 'total contents %9d bytes' % total
1165
print 'compression ratio %9.2fx' % (float(total) / float(weave_size))
1168
print 'average size %9d bytes' % avg
1169
print 'relative size %9.2fx' % (float(weave_size) / float(avg))
1173
print """bzr weave tool
1175
Experimental tool for weave algorithm.
1178
weave init WEAVEFILE
1179
Create an empty weave file
1180
weave get WEAVEFILE VERSION
1181
Write out specified version.
1182
weave check WEAVEFILE
1183
Check consistency of all versions.
1185
Display table of contents.
1186
weave add WEAVEFILE NAME [BASE...] < NEWTEXT
1187
Add NEWTEXT, with specified parent versions.
1188
weave annotate WEAVEFILE VERSION
1189
Display origin of each line.
1190
weave merge WEAVEFILE VERSION1 VERSION2 > OUT
1191
Auto-merge two versions and display conflicts.
1192
weave diff WEAVEFILE VERSION1 VERSION2
1193
Show differences between two versions.
1197
% weave init foo.weave
1199
% weave add foo.weave ver0 < foo.txt
1202
(create updated version)
1204
% weave get foo.weave 0 | diff -u - foo.txt
1205
% weave add foo.weave ver1 0 < foo.txt
1208
% weave get foo.weave 0 > foo.txt (create forked version)
1210
% weave add foo.weave ver2 0 < foo.txt
1213
% weave merge foo.weave 1 2 > foo.txt (merge them)
1214
% vi foo.txt (resolve conflicts)
1215
% weave add foo.weave merged 1 2 < foo.txt (commit merged version)
1227
# in case we're run directly from the subdirectory
1228
sys.path.append('..')
1230
from bzrlib.weavefile import write_weave, read_weave
1231
from bzrlib.progress import ProgressBar
1246
return read_weave(file(argv[2], 'rb'))
1252
# at the moment, based on everything in the file
1254
parents = map(int, argv[4:])
1255
lines = sys.stdin.readlines()
1256
ver = w.add(name, parents, lines)
1257
write_weave(w, file(argv[2], 'wb'))
1258
print 'added version %r %d' % (name, ver)
1261
if os.path.exists(fn):
1262
raise IOError("file exists")
1264
write_weave(w, file(fn, 'wb'))
1265
elif cmd == 'get': # get one version
1267
sys.stdout.writelines(w.get_iter(int(argv[3])))
1272
v1, v2 = map(int, argv[3:5])
1275
diff_gen = bzrlib.patiencediff.unified_diff(lines1, lines2,
1276
'%s version %d' % (fn, v1),
1277
'%s version %d' % (fn, v2))
1278
sys.stdout.writelines(diff_gen)
1280
elif cmd == 'annotate':
1282
# newline is added to all lines regardless; too hard to get
1283
# reasonable formatting otherwise
1285
for origin, text in w.annotate(int(argv[3])):
1286
text = text.rstrip('\r\n')
1288
print ' | %s' % (text)
1290
print '%5d | %s' % (origin, text)
1296
elif cmd == 'stats':
1297
weave_stats(argv[2], ProgressBar())
1299
elif cmd == 'check':
1304
print '%d versions ok' % w.num_versions()
1306
elif cmd == 'inclusions':
1308
print ' '.join(map(str, w.inclusions([int(argv[3])])))
1310
elif cmd == 'parents':
1312
print ' '.join(map(str, w._parents[int(argv[3])]))
1314
elif cmd == 'plan-merge':
1315
# replaced by 'bzr weave-plan-merge'
1317
for state, line in w.plan_merge(int(argv[3]), int(argv[4])):
1319
print '%14s | %s' % (state, line),
1320
elif cmd == 'merge':
1321
# replaced by 'bzr weave-merge-text'
1323
p = w.plan_merge(int(argv[3]), int(argv[4]))
1324
sys.stdout.writelines(w.weave_merge(p))
1326
raise ValueError('unknown command %r' % cmd)
1329
if __name__ == '__main__':
1331
sys.exit(main(sys.argv))
1334
class InterWeave(InterVersionedFile):
1335
"""Optimised code paths for weave to weave operations."""
1337
_matching_file_from_factory = staticmethod(WeaveFile)
1338
_matching_file_to_factory = staticmethod(WeaveFile)
1341
def is_compatible(source, target):
1342
"""Be compatible with weaves."""
1344
return (isinstance(source, Weave) and
1345
isinstance(target, Weave))
1346
except AttributeError:
1349
def join(self, pb=None, msg=None, version_ids=None, ignore_missing=False):
1350
"""See InterVersionedFile.join."""
1351
version_ids = self._get_source_version_ids(version_ids, ignore_missing)
1352
if self.target.versions() == [] and version_ids is None:
1353
self.target._copy_weave_content(self.source)
1356
self.target._join(self.source, pb, msg, version_ids, ignore_missing)
1357
except errors.WeaveParentMismatch:
1358
self.target._reweave(self.source, pb, msg)
1361
InterVersionedFile.register_optimiser(InterWeave)