127
128
DATA_SUFFIX = '.knit'
128
129
INDEX_SUFFIX = '.kndx'
129
_STREAM_MIN_BUFFER_SIZE = 5*1024*1024
130
_STREAM_MIN_BUFFER_SIZE = 5 * 1024 * 1024
133
class KnitError(InternalBzrError):
138
class KnitCorrupt(KnitError):
140
_fmt = "Knit %(filename)s corrupt: %(how)s"
142
def __init__(self, filename, how):
143
KnitError.__init__(self)
144
self.filename = filename
148
class SHA1KnitCorrupt(KnitCorrupt):
150
_fmt = ("Knit %(filename)s corrupt: sha-1 of reconstructed text does not "
151
"match expected sha-1. key %(key)s expected sha %(expected)s actual "
154
def __init__(self, filename, actual, expected, key, content):
155
KnitError.__init__(self)
156
self.filename = filename
158
self.expected = expected
160
self.content = content
163
class KnitDataStreamIncompatible(KnitError):
164
# Not raised anymore, as we can convert data streams. In future we may
165
# need it again for more exotic cases, so we're keeping it around for now.
167
_fmt = "Cannot insert knit data stream of format \"%(stream_format)s\" into knit of format \"%(target_format)s\"."
169
def __init__(self, stream_format, target_format):
170
self.stream_format = stream_format
171
self.target_format = target_format
174
class KnitDataStreamUnknown(KnitError):
175
# Indicates a data stream we don't know how to handle.
177
_fmt = "Cannot parse knit data stream of format \"%(stream_format)s\"."
179
def __init__(self, stream_format):
180
self.stream_format = stream_format
183
class KnitHeaderError(KnitError):
185
_fmt = 'Knit header error: %(badline)r unexpected for file "%(filename)s".'
187
def __init__(self, badline, filename):
188
KnitError.__init__(self)
189
self.badline = badline
190
self.filename = filename
193
class KnitIndexUnknownMethod(KnitError):
194
"""Raised when we don't understand the storage method.
196
Currently only 'fulltext' and 'line-delta' are supported.
199
_fmt = ("Knit index %(filename)s does not have a known method"
200
" in options: %(options)r")
202
def __init__(self, filename, options):
203
KnitError.__init__(self)
204
self.filename = filename
205
self.options = options
132
208
class KnitAdapter(object):
632
711
# loop to minimise any performance impact
634
713
for header in lines:
635
start, end, count = [int(n) for n in header.split(',')]
636
contents = [next().split(' ', 1)[1] for i in xrange(count)]
714
start, end, count = [int(n) for n in header.split(b',')]
715
contents = [next(lines).split(b' ', 1)[1]
716
for _ in range(count)]
637
717
result.append((start, end, count, contents))
639
719
for header in lines:
640
start, end, count = [int(n) for n in header.split(',')]
641
contents = [tuple(next().split(' ', 1)) for i in xrange(count)]
720
start, end, count = [int(n) for n in header.split(b',')]
721
contents = [tuple(next(lines).split(b' ', 1))
722
for _ in range(count)]
642
723
result.append((start, end, count, contents))
645
726
def get_fulltext_content(self, lines):
646
727
"""Extract just the content lines from a fulltext."""
647
return (line.split(' ', 1)[1] for line in lines)
728
return (line.split(b' ', 1)[1] for line in lines)
649
730
def get_linedelta_content(self, lines):
650
731
"""Extract just the content from a line delta.
800
879
max_delta_chain = 0
801
880
graph_index = _mod_index.InMemoryGraphIndex(reference_lists=ref_length,
802
key_elements=keylength)
881
key_elements=keylength)
803
882
stream = transport.open_write_stream('newpack')
804
883
writer = pack.ContainerWriter(stream.write)
806
index = _KnitGraphIndex(graph_index, lambda:True, parents=parents,
807
deltas=delta, add_callback=graph_index.add_nodes)
808
access = _DirectPackAccess({})
885
index = _KnitGraphIndex(graph_index, lambda: True, parents=parents,
886
deltas=delta, add_callback=graph_index.add_nodes)
887
access = pack_repo._DirectPackAccess({})
809
888
access.set_writer(writer, graph_index, (transport, 'newpack'))
810
889
result = KnitVersionedFiles(index, access,
811
max_delta_chain=max_delta_chain)
890
max_delta_chain=max_delta_chain)
812
891
result.stream = stream
813
892
result.writer = writer
973
def without_fallbacks(self):
974
"""Return a clone of this object without any fallbacks configured."""
975
return KnitVersionedFiles(self._index, self._access,
976
self._max_delta_chain, self._factory.annotated,
894
979
def add_fallback_versioned_files(self, a_versioned_files):
895
980
"""Add a source of texts for texts not present in this knit.
897
982
:param a_versioned_files: A VersionedFiles object.
899
self._fallback_vfs.append(a_versioned_files)
984
self._immediate_fallback_vfs.append(a_versioned_files)
901
986
def add_lines(self, key, parents, lines, parent_texts=None,
902
left_matching_blocks=None, nostore_sha=None, random_id=False,
987
left_matching_blocks=None, nostore_sha=None, random_id=False,
904
989
"""See VersionedFiles.add_lines()."""
905
990
self._index._check_write_ok()
906
991
self._check_add(key, lines, random_id, check_content)
909
994
# indexes can't directly store that, so we give them
910
995
# an empty tuple instead.
912
line_bytes = ''.join(lines)
997
line_bytes = b''.join(lines)
913
998
return self._add(key, lines, parents,
914
parent_texts, left_matching_blocks, nostore_sha, random_id,
915
line_bytes=line_bytes)
917
def _add_text(self, key, parents, text, nostore_sha=None, random_id=False):
918
"""See VersionedFiles._add_text()."""
919
self._index._check_write_ok()
920
self._check_add(key, None, random_id, check_content=False)
921
if text.__class__ is not str:
922
raise errors.BzrBadParameterUnicode("text")
924
# The caller might pass None if there is no graph data, but kndx
925
# indexes can't directly store that, so we give them
926
# an empty tuple instead.
928
return self._add(key, None, parents,
929
None, None, nostore_sha, random_id,
999
parent_texts, left_matching_blocks, nostore_sha, random_id,
1000
line_bytes=line_bytes)
932
1002
def _add(self, key, lines, parents, parent_texts,
933
left_matching_blocks, nostore_sha, random_id,
1003
left_matching_blocks, nostore_sha, random_id,
935
1005
"""Add a set of lines on top of version specified by parents.
937
1007
Any versions not present will be converted into ghosts.
988
1058
lines = lines[:]
989
1059
# Replace the last line with one that ends in a final newline
990
lines[-1] = lines[-1] + '\n'
1060
lines[-1] = lines[-1] + b'\n'
991
1061
if lines is None:
992
1062
lines = osutils.split_lines(line_bytes)
994
1064
for element in key[:-1]:
995
if type(element) is not str:
996
raise TypeError("key contains non-strings: %r" % (key,))
1065
if not isinstance(element, bytes):
1066
raise TypeError("key contains non-bytestrings: %r" % (key,))
997
1067
if key[-1] is None:
998
key = key[:-1] + ('sha1:' + digest,)
999
elif type(key[-1]) is not str:
1000
raise TypeError("key contains non-strings: %r" % (key,))
1068
key = key[:-1] + (b'sha1:' + digest,)
1069
elif not isinstance(key[-1], bytes):
1070
raise TypeError("key contains non-bytestrings: %r" % (key,))
1001
1071
# Knit hunks are still last-element only
1002
1072
version_id = key[-1]
1003
1073
content = self._factory.make(lines, version_id)
1008
1078
if delta or (self._factory.annotated and len(present_parents) > 0):
1009
1079
# Merge annotations from parent texts if needed.
1010
1080
delta_hunks = self._merge_annotations(content, present_parents,
1011
parent_texts, delta, self._factory.annotated,
1012
left_matching_blocks)
1081
parent_texts, delta, self._factory.annotated,
1082
left_matching_blocks)
1015
options.append('line-delta')
1085
options.append(b'line-delta')
1016
1086
store_lines = self._factory.lower_line_delta(delta_hunks)
1017
size, bytes = self._record_to_data(key, digest,
1087
size, data = self._record_to_data(key, digest,
1020
options.append('fulltext')
1090
options.append(b'fulltext')
1021
1091
# isinstance is slower and we have no hierarchy.
1022
1092
if self._factory.__class__ is KnitPlainFactory:
1023
1093
# Use the already joined bytes saving iteration time in
1024
1094
# _record_to_data.
1025
1095
dense_lines = [line_bytes]
1027
dense_lines.append('\n')
1028
size, bytes = self._record_to_data(key, digest,
1097
dense_lines.append(b'\n')
1098
size, data = self._record_to_data(key, digest,
1031
1101
# get mixed annotation + content and feed it into the
1033
1103
store_lines = self._factory.lower_fulltext(content)
1034
size, bytes = self._record_to_data(key, digest,
1104
size, data = self._record_to_data(key, digest,
1037
access_memo = self._access.add_raw_records([(key, size)], bytes)[0]
1107
access_memo = self._access.add_raw_records([(key, size)], data)[0]
1038
1108
self._index.add_records(
1039
1109
((key, options, access_memo, parents),),
1040
1110
random_id=random_id)
1241
1301
"""Produce a dictionary of knit records.
1243
1303
:return: {key:(record, record_details, digest, next)}
1245
data returned from read_records (a KnitContentobject)
1247
opaque information to pass to parse_record
1249
SHA1 digest of the full text after all steps are done
1251
build-parent of the version, i.e. the leftmost ancestor.
1305
* record: data returned from read_records (a KnitContentobject)
1306
* record_details: opaque information to pass to parse_record
1307
* digest: SHA1 digest of the full text after all steps are done
1308
* next: build-parent of the version, i.e. the leftmost ancestor.
1252
1309
Will be None if the record is not a delta.
1253
1311
:param keys: The keys to build a map for
1254
1312
:param allow_missing: If some records are missing, rather than
1255
1313
error, just return the data that could be generated.
1257
1315
raw_map = self._get_record_map_unparsed(keys,
1258
allow_missing=allow_missing)
1316
allow_missing=allow_missing)
1259
1317
return self._raw_map_to_record_map(raw_map)
1261
1319
def _raw_map_to_record_map(self, raw_map):
1405
1463
keys = set(remaining_keys)
1406
1464
for content_factory in self._get_remaining_record_stream(keys,
1407
ordering, include_delta_closure):
1465
ordering, include_delta_closure):
1408
1466
remaining_keys.discard(content_factory.key)
1409
1467
yield content_factory
1411
except errors.RetryWithNewPacks, e:
1469
except errors.RetryWithNewPacks as e:
1412
1470
self._access.reload_or_raise(e)
1414
1472
def _get_remaining_record_stream(self, keys, ordering,
1415
1473
include_delta_closure):
1416
1474
"""This function is the 'retry' portion for get_record_stream."""
1417
1475
if include_delta_closure:
1418
positions = self._get_components_positions(keys, allow_missing=True)
1476
positions = self._get_components_positions(
1477
keys, allow_missing=True)
1420
1479
build_details = self._index.get_build_details(keys)
1421
1480
# map from key to
1422
1481
# (record_details, access_memo, compression_parent_key)
1423
1482
positions = dict((key, self._build_details_to_components(details))
1424
for key, details in build_details.iteritems())
1483
for key, details in viewitems(build_details))
1425
1484
absent_keys = keys.difference(set(positions))
1426
1485
# There may be more absent keys : if we're missing the basis component
1427
1486
# and are trying to include the delta closure.
1767
1827
# we need key, position, length
1768
1828
key_records = []
1769
1829
build_details = self._index.get_build_details(keys)
1770
for key, details in build_details.iteritems():
1830
for key, details in viewitems(build_details):
1771
1831
if key in keys:
1772
1832
key_records.append((key, details[0]))
1773
1833
records_iter = enumerate(self._read_records_iter(key_records))
1774
1834
for (key_idx, (key, data, sha_value)) in records_iter:
1775
pb.update('Walking content', key_idx, total)
1835
pb.update(gettext('Walking content'), key_idx, total)
1776
1836
compression_parent = build_details[key][1]
1777
1837
if compression_parent is None:
1779
line_iterator = self._factory.get_fulltext_content(data)
1839
line_iterator = self._factory.get_fulltext_content(
1782
line_iterator = self._factory.get_linedelta_content(data)
1843
line_iterator = self._factory.get_linedelta_content(
1783
1845
# Now that we are yielding the data for this key, remove it
1784
1846
# from the list
1785
1847
keys.remove(key)
1894
1957
# 4168 calls in 2880 217 internal
1895
1958
# 4168 calls to _parse_record_header in 2121
1896
1959
# 4168 calls to readlines in 330
1897
df = tuned_gzip.GzipFile(mode='rb', fileobj=StringIO(data))
1899
record_contents = df.readlines()
1900
except Exception, e:
1901
raise KnitCorrupt(self, "Corrupt compressed record %r, got %s(%s)" %
1902
(data, e.__class__.__name__, str(e)))
1903
header = record_contents.pop(0)
1904
rec = self._split_header(header)
1905
last_line = record_contents.pop()
1906
if len(record_contents) != int(rec[2]):
1907
raise KnitCorrupt(self,
1908
'incorrect number of lines %s != %s'
1909
' for version {%s} %s'
1910
% (len(record_contents), int(rec[2]),
1911
rec[1], record_contents))
1912
if last_line != 'end %s\n' % rec[1]:
1913
raise KnitCorrupt(self,
1914
'unexpected version end line %r, wanted %r'
1915
% (last_line, rec[1]))
1960
with gzip.GzipFile(mode='rb', fileobj=BytesIO(data)) as df:
1962
record_contents = df.readlines()
1963
except Exception as e:
1964
raise KnitCorrupt(self, "Corrupt compressed record %r, got %s(%s)" %
1965
(data, e.__class__.__name__, str(e)))
1966
header = record_contents.pop(0)
1967
rec = self._split_header(header)
1968
last_line = record_contents.pop()
1969
if len(record_contents) != int(rec[2]):
1970
raise KnitCorrupt(self,
1971
'incorrect number of lines %s != %s'
1972
' for version {%s} %s'
1973
% (len(record_contents), int(rec[2]),
1974
rec[1], record_contents))
1975
if last_line != b'end %s\n' % rec[1]:
1976
raise KnitCorrupt(self,
1977
'unexpected version end line %r, wanted %r'
1978
% (last_line, rec[1]))
1917
1979
return rec, record_contents
1919
1981
def _read_records_iter(self, records):
1985
2047
:param key: The key of the record. Currently keys are always serialised
1986
2048
using just the trailing component.
1987
2049
:param dense_lines: The bytes of lines but in a denser form. For
1988
instance, if lines is a list of 1000 bytestrings each ending in \n,
1989
dense_lines may be a list with one line in it, containing all the
1990
1000's lines and their \n's. Using dense_lines if it is already
1991
known is a win because the string join to create bytes in this
1992
function spends less time resizing the final string.
1993
:return: (len, a StringIO instance with the raw data ready to read.)
2050
instance, if lines is a list of 1000 bytestrings each ending in
2051
\\n, dense_lines may be a list with one line in it, containing all
2052
the 1000's lines and their \\n's. Using dense_lines if it is
2053
already known is a win because the string join to create bytes in
2054
this function spends less time resizing the final string.
2055
:return: (len, a BytesIO instance with the raw data ready to read.)
1995
chunks = ["version %s %d %s\n" % (key[-1], len(lines), digest)]
2057
chunks = [b"version %s %d %s\n" % (key[-1], len(lines), digest)]
1996
2058
chunks.extend(dense_lines or lines)
1997
chunks.append("end %s\n" % key[-1])
2059
chunks.append(b"end " + key[-1] + b"\n")
1998
2060
for chunk in chunks:
1999
if type(chunk) is not str:
2061
if not isinstance(chunk, bytes):
2000
2062
raise AssertionError(
2001
2063
'data must be plain bytes was %s' % type(chunk))
2002
if lines and lines[-1][-1] != '\n':
2064
if lines and not lines[-1].endswith(b'\n'):
2003
2065
raise ValueError('corrupt lines value %r' % lines)
2004
compressed_bytes = tuned_gzip.chunks_to_gzip(chunks)
2066
compressed_bytes = b''.join(tuned_gzip.chunks_to_gzip(chunks))
2005
2067
return len(compressed_bytes), compressed_bytes
2007
2069
def _split_header(self, line):
2175
2237
# one line with next ('' for None)
2176
2238
# one line with byte count of the record bytes
2177
2239
# the record bytes
2178
for key, (record_bytes, (method, noeol), next) in \
2179
self._raw_record_map.iteritems():
2180
key_bytes = '\x00'.join(key)
2240
for key, (record_bytes, (method, noeol), next) in viewitems(
2241
self._raw_record_map):
2242
key_bytes = b'\x00'.join(key)
2181
2243
parents = self.global_map.get(key, None)
2182
2244
if parents is None:
2183
parent_bytes = 'None:'
2245
parent_bytes = b'None:'
2185
parent_bytes = '\t'.join('\x00'.join(key) for key in parents)
2186
method_bytes = method
2247
parent_bytes = b'\t'.join(b'\x00'.join(key) for key in parents)
2248
method_bytes = method.encode('ascii')
2192
next_bytes = '\x00'.join(next)
2254
next_bytes = b'\x00'.join(next)
2195
map_byte_list.append('%s\n%s\n%s\n%s\n%s\n%d\n%s' % (
2196
key_bytes, parent_bytes, method_bytes, noeol_bytes, next_bytes,
2197
len(record_bytes), record_bytes))
2198
map_bytes = ''.join(map_byte_list)
2257
map_byte_list.append(b'\n'.join(
2258
[key_bytes, parent_bytes, method_bytes, noeol_bytes, next_bytes,
2259
b'%d' % len(record_bytes), record_bytes]))
2260
map_bytes = b''.join(map_byte_list)
2199
2261
lines.append(map_bytes)
2200
bytes = '\n'.join(lines)
2262
bytes = b'\n'.join(lines)
2282
2344
end = len(bytes)
2283
2345
while start < end:
2284
2346
# 1 line with key
2285
line_end = bytes.find('\n', start)
2286
key = tuple(bytes[start:line_end].split('\x00'))
2347
line_end = bytes.find(b'\n', start)
2348
key = tuple(bytes[start:line_end].split(b'\x00'))
2287
2349
start = line_end + 1
2288
2350
# 1 line with parents (None: for None, '' for ())
2289
line_end = bytes.find('\n', start)
2351
line_end = bytes.find(b'\n', start)
2290
2352
line = bytes[start:line_end]
2353
if line == b'None:':
2294
2356
parents = tuple(
2295
[tuple(segment.split('\x00')) for segment in line.split('\t')
2357
tuple(segment.split(b'\x00')) for segment in line.split(b'\t')
2297
2359
self.global_map[key] = parents
2298
2360
start = line_end + 1
2299
2361
# one line with method
2300
line_end = bytes.find('\n', start)
2362
line_end = bytes.find(b'\n', start)
2301
2363
line = bytes[start:line_end]
2364
method = line.decode('ascii')
2303
2365
start = line_end + 1
2304
2366
# one line with noeol
2305
line_end = bytes.find('\n', start)
2367
line_end = bytes.find(b'\n', start)
2306
2368
line = bytes[start:line_end]
2369
noeol = line == b"T"
2308
2370
start = line_end + 1
2309
# one line with next ('' for None)
2310
line_end = bytes.find('\n', start)
2371
# one line with next (b'' for None)
2372
line_end = bytes.find(b'\n', start)
2311
2373
line = bytes[start:line_end]
2315
next = tuple(bytes[start:line_end].split('\x00'))
2377
next = tuple(bytes[start:line_end].split(b'\x00'))
2316
2378
start = line_end + 1
2317
2379
# one line with byte count of the record bytes
2318
line_end = bytes.find('\n', start)
2380
line_end = bytes.find(b'\n', start)
2319
2381
line = bytes[start:line_end]
2320
2382
count = int(line)
2321
2383
start = line_end + 1
2322
2384
# the record bytes
2323
record_bytes = bytes[start:start+count]
2385
record_bytes = bytes[start:start + count]
2324
2386
start = start + count
2325
2387
# put it in the map
2326
2388
self._raw_record_map[key] = (record_bytes, (method, noeol), next)
2442
2504
for key, options, (_, pos, size), parents in path_keys:
2505
if not all(isinstance(option, bytes) for option in options):
2506
raise TypeError(options)
2443
2507
if parents is None:
2444
2508
# kndx indices cannot be parentless.
2446
line = "\n%s %s %s %s %s :" % (
2447
key[-1], ','.join(options), pos, size,
2448
self._dictionary_compress(parents))
2449
if type(line) is not str:
2512
+ key[-1], b','.join(options), b'%d' % pos, b'%d' % size,
2513
self._dictionary_compress(parents), b':'])
2514
if not isinstance(line, bytes):
2450
2515
raise AssertionError(
2451
2516
'data must be utf8 was %s' % type(line))
2452
2517
lines.append(line)
2453
2518
self._cache_key(key, options, pos, size, parents)
2454
2519
if len(orig_history):
2455
self._transport.append_bytes(path, ''.join(lines))
2520
self._transport.append_bytes(path, b''.join(lines))
2457
2522
self._init_index(path, lines)
2550
2615
for key in keys:
2551
2616
if key not in parent_map:
2553
2618
method = self.get_method(key)
2619
if not isinstance(method, str):
2620
raise TypeError(method)
2554
2621
parents = parent_map[key]
2555
2622
if method == 'fulltext':
2556
2623
compression_parent = None
2558
2625
compression_parent = parents[0]
2559
noeol = 'no-eol' in self.get_options(key)
2626
noeol = b'no-eol' in self.get_options(key)
2560
2627
index_memo = self.get_position(key)
2561
2628
result[key] = (index_memo, compression_parent,
2562
parents, (method, noeol))
2629
parents, (method, noeol))
2565
2632
def get_method(self, key):
2566
2633
"""Return compression method of specified key."""
2567
2634
options = self.get_options(key)
2568
if 'fulltext' in options:
2635
if b'fulltext' in options:
2569
2636
return 'fulltext'
2570
elif 'line-delta' in options:
2637
elif b'line-delta' in options:
2571
2638
return 'line-delta'
2573
raise errors.KnitIndexUnknownMethod(self, options)
2640
raise KnitIndexUnknownMethod(self, options)
2575
2642
def get_options(self, key):
2576
2643
"""Return a list representing options.
2784
2848
def _split_key(self, key):
2785
2849
"""Split key into a prefix and suffix."""
2850
# GZ 2018-07-03: This is intentionally either a sequence or bytes?
2851
if isinstance(key, bytes):
2852
return key[:-1], key[-1:]
2786
2853
return key[:-1], key[-1]
2789
class _KeyRefs(object):
2791
def __init__(self, track_new_keys=False):
2792
# dict mapping 'key' to 'set of keys referring to that key'
2795
# set remembering all new keys
2796
self.new_keys = set()
2798
self.new_keys = None
2804
self.new_keys.clear()
2806
def add_references(self, key, refs):
2807
# Record the new references
2808
for referenced in refs:
2810
needed_by = self.refs[referenced]
2812
needed_by = self.refs[referenced] = set()
2814
# Discard references satisfied by the new key
2817
def get_new_keys(self):
2818
return self.new_keys
2820
def get_unsatisfied_refs(self):
2821
return self.refs.iterkeys()
2823
def _satisfy_refs_for_key(self, key):
2827
# No keys depended on this key. That's ok.
2830
def add_key(self, key):
2831
# satisfy refs for key, and remember that we've seen this key.
2832
self._satisfy_refs_for_key(key)
2833
if self.new_keys is not None:
2834
self.new_keys.add(key)
2836
def satisfy_refs_for_keys(self, keys):
2838
self._satisfy_refs_for_key(key)
2840
def get_referrers(self):
2842
for referrers in self.refs.itervalues():
2843
result.update(referrers)
2847
2856
class _KnitGraphIndex(object):
2848
2857
"""A KnitVersionedFiles index layered on GraphIndex."""
2850
2859
def __init__(self, graph_index, is_locked, deltas=False, parents=True,
2851
add_callback=None, track_external_parent_refs=False):
2860
add_callback=None, track_external_parent_refs=False):
2852
2861
"""Construct a KnitGraphIndex on a graph_index.
2854
:param graph_index: An implementation of bzrlib.index.GraphIndex.
2863
:param graph_index: An implementation of breezy.index.GraphIndex.
2855
2864
:param is_locked: A callback to check whether the object should answer
2857
2866
:param deltas: Allow delta-compressed records.
2950
2960
# Sometimes these are passed as a list rather than a tuple
2951
2961
passed = static_tuple.as_tuples(keys[key])
2952
2962
passed_parents = passed[1][:1]
2953
if (value[0] != keys[key][0][0] or
2954
parents != passed_parents):
2963
if (value[0:1] != keys[key][0][0:1]
2964
or parents != passed_parents):
2955
2965
node_refs = static_tuple.as_tuples(node_refs)
2956
2966
raise KnitCorrupt(self, "inconsistent details in add_records"
2957
": %s %s" % ((value, node_refs), passed))
2967
": %s %s" % ((value, node_refs), passed))
2960
2970
if self._parents:
2961
for key, (value, node_refs) in keys.iteritems():
2971
for key, (value, node_refs) in viewitems(keys):
2962
2972
result.append((key, value, node_refs))
2964
for key, (value, node_refs) in keys.iteritems():
2974
for key, (value, node_refs) in viewitems(keys):
2965
2975
result.append((key, value))
2966
2976
self._add_callback(result)
2967
2977
if missing_compression_parents:
3281
class _DirectPackAccess(object):
3282
"""Access to data in one or more packs with less translation."""
3284
def __init__(self, index_to_packs, reload_func=None, flush_func=None):
3285
"""Create a _DirectPackAccess object.
3287
:param index_to_packs: A dict mapping index objects to the transport
3288
and file names for obtaining data.
3289
:param reload_func: A function to call if we determine that the pack
3290
files have moved and we need to reload our caches. See
3291
bzrlib.repo_fmt.pack_repo.AggregateIndex for more details.
3293
self._container_writer = None
3294
self._write_index = None
3295
self._indices = index_to_packs
3296
self._reload_func = reload_func
3297
self._flush_func = flush_func
3299
def add_raw_records(self, key_sizes, raw_data):
3300
"""Add raw knit bytes to a storage area.
3302
The data is spooled to the container writer in one bytes-record per
3305
:param sizes: An iterable of tuples containing the key and size of each
3307
:param raw_data: A bytestring containing the data.
3308
:return: A list of memos to retrieve the record later. Each memo is an
3309
opaque index memo. For _DirectPackAccess the memo is (index, pos,
3310
length), where the index field is the write_index object supplied
3311
to the PackAccess object.
3313
if type(raw_data) is not str:
3314
raise AssertionError(
3315
'data must be plain bytes was %s' % type(raw_data))
3318
for key, size in key_sizes:
3319
p_offset, p_length = self._container_writer.add_bytes_record(
3320
raw_data[offset:offset+size], [])
3322
result.append((self._write_index, p_offset, p_length))
3326
"""Flush pending writes on this access object.
3328
This will flush any buffered writes to a NewPack.
3330
if self._flush_func is not None:
3333
def get_raw_records(self, memos_for_retrieval):
3334
"""Get the raw bytes for a records.
3336
:param memos_for_retrieval: An iterable containing the (index, pos,
3337
length) memo for retrieving the bytes. The Pack access method
3338
looks up the pack to use for a given record in its index_to_pack
3340
:return: An iterator over the bytes of the records.
3342
# first pass, group into same-index requests
3344
current_index = None
3345
for (index, offset, length) in memos_for_retrieval:
3346
if current_index == index:
3347
current_list.append((offset, length))
3349
if current_index is not None:
3350
request_lists.append((current_index, current_list))
3351
current_index = index
3352
current_list = [(offset, length)]
3353
# handle the last entry
3354
if current_index is not None:
3355
request_lists.append((current_index, current_list))
3356
for index, offsets in request_lists:
3358
transport, path = self._indices[index]
3360
# A KeyError here indicates that someone has triggered an index
3361
# reload, and this index has gone missing, we need to start
3363
if self._reload_func is None:
3364
# If we don't have a _reload_func there is nothing that can
3367
raise errors.RetryWithNewPacks(index,
3368
reload_occurred=True,
3369
exc_info=sys.exc_info())
3371
reader = pack.make_readv_reader(transport, path, offsets)
3372
for names, read_func in reader.iter_records():
3373
yield read_func(None)
3374
except errors.NoSuchFile:
3375
# A NoSuchFile error indicates that a pack file has gone
3376
# missing on disk, we need to trigger a reload, and start over.
3377
if self._reload_func is None:
3379
raise errors.RetryWithNewPacks(transport.abspath(path),
3380
reload_occurred=False,
3381
exc_info=sys.exc_info())
3383
def set_writer(self, writer, index, transport_packname):
3384
"""Set a writer to use for adding data."""
3385
if index is not None:
3386
self._indices[index] = transport_packname
3387
self._container_writer = writer
3388
self._write_index = index
3390
def reload_or_raise(self, retry_exc):
3391
"""Try calling the reload function, or re-raise the original exception.
3393
This should be called after _DirectPackAccess raises a
3394
RetryWithNewPacks exception. This function will handle the common logic
3395
of determining when the error is fatal versus being temporary.
3396
It will also make sure that the original exception is raised, rather
3397
than the RetryWithNewPacks exception.
3399
If this function returns, then the calling function should retry
3400
whatever operation was being performed. Otherwise an exception will
3403
:param retry_exc: A RetryWithNewPacks exception.
3406
if self._reload_func is None:
3408
elif not self._reload_func():
3409
# The reload claimed that nothing changed
3410
if not retry_exc.reload_occurred:
3411
# If there wasn't an earlier reload, then we really were
3412
# expecting to find changes. We didn't find them, so this is a
3416
exc_class, exc_value, exc_traceback = retry_exc.exc_info
3417
raise exc_class, exc_value, exc_traceback
3420
# Deprecated, use PatienceSequenceMatcher instead
3421
KnitSequenceMatcher = patiencediff.PatienceSequenceMatcher
3424
3291
def annotate_knit(knit, revision_id):
3425
3292
"""Annotate a knit with no cached annotations.
3535
3402
records, ann_keys = self._get_build_graph(key)
3536
3403
for idx, (sub_key, text, num_lines) in enumerate(
3537
self._extract_texts(records)):
3404
self._extract_texts(records)):
3538
3405
if pb is not None:
3539
pb.update('annotating', idx, len(records))
3406
pb.update(gettext('annotating'), idx, len(records))
3540
3407
yield sub_key, text, num_lines
3541
3408
for sub_key in ann_keys:
3542
3409
text = self._text_cache[sub_key]
3543
num_lines = len(text) # bad assumption
3410
num_lines = len(text) # bad assumption
3544
3411
yield sub_key, text, num_lines
3546
except errors.RetryWithNewPacks, e:
3413
except errors.RetryWithNewPacks as e:
3547
3414
self._vf._access.reload_or_raise(e)
3548
3415
# The cached build_details are no longer valid
3549
3416
self._all_build_details.clear()
3551
3418
def _cache_delta_blocks(self, key, compression_parent, delta, lines):
3552
3419
parent_lines = self._text_cache[compression_parent]
3553
blocks = list(KnitContent.get_line_delta_blocks(delta, parent_lines, lines))
3420
blocks = list(KnitContent.get_line_delta_blocks(
3421
delta, parent_lines, lines))
3554
3422
self._matching_blocks[(key, compression_parent)] = blocks
3556
3424
def _expand_record(self, key, parent_keys, compression_parent, record,
added
removed
breezy/bzr/knit.py
