138
144
_to_escaped_map.clear()
141
class Serializer_v5(Serializer):
142
"""Version 5 serializer
147
class Serializer_v8(XMLSerializer):
148
"""This serialiser adds rich roots.
144
Packs objects into XML and vice versa.
150
Its revision format number matches its inventory number.
149
156
support_altered_by_hack = True
150
157
# This format supports the altered-by hack that reads file ids directly out
151
158
# of the versionedfile, without doing XML parsing.
153
160
supported_kinds = set(['file', 'directory', 'symlink'])
155
def write_inventory_to_string(self, inv):
156
"""Just call write_inventory with a StringIO and return the value"""
162
revision_format_num = None
164
def _check_revisions(self, inv):
165
"""Extension point for subclasses to check during serialisation.
167
:param inv: An inventory about to be serialised, to be checked.
168
:raises: AssertionError if an error has occurred.
170
if inv.revision_id is None:
171
raise AssertionError("inv.revision_id is None")
172
if inv.root.revision is None:
173
raise AssertionError("inv.root.revision is None")
175
def _check_cache_size(self, inv_size, entry_cache):
176
"""Check that the entry_cache is large enough.
178
We want the cache to be ~2x the size of an inventory. The reason is
179
because we use a FIFO cache, and how Inventory records are likely to
180
change. In general, you have a small number of records which change
181
often, and a lot of records which do not change at all. So when the
182
cache gets full, you actually flush out a lot of the records you are
183
interested in, which means you need to recreate all of those records.
184
An LRU Cache would be better, but the overhead negates the cache
187
One way to look at it, only the size of the cache > len(inv) is your
188
'working' set. And in general, it shouldn't be a problem to hold 2
189
inventories in memory anyway.
191
:param inv_size: The number of entries in an inventory.
193
if entry_cache is None:
195
# 1.5 times might also be reasonable.
196
recommended_min_cache_size = inv_size * 1.5
197
if entry_cache.cache_size() < recommended_min_cache_size:
198
recommended_cache_size = inv_size * 2
199
trace.mutter('Resizing the inventory entry cache from %d to %d',
200
entry_cache.cache_size(), recommended_cache_size)
201
entry_cache.resize(recommended_cache_size)
203
def write_inventory_to_lines(self, inv):
204
"""Return a list of lines with the encoded inventory."""
205
return self.write_inventory(inv, None)
207
def write_inventory_to_string(self, inv, working=False):
208
"""Just call write_inventory with a StringIO and return the value.
210
:param working: If True skip history data - text_sha1, text_size,
211
reference_revision, symlink_target.
157
213
sio = cStringIO.StringIO()
158
self.write_inventory(inv, sio)
214
self.write_inventory(inv, sio, working)
159
215
return sio.getvalue()
161
def write_inventory(self, inv, f):
217
def write_inventory(self, inv, f, working=False):
162
218
"""Write inventory to a file.
164
220
:param inv: the inventory to write.
165
:param f: the file to write.
221
:param f: the file to write. (May be None if the lines are the desired
223
:param working: If True skip history data - text_sha1, text_size,
224
reference_revision, symlink_target.
225
:return: The inventory as a list of lines.
167
227
_ensure_utf8_re()
228
self._check_revisions(inv)
169
230
append = output.append
170
231
self._append_inventory_root(append, inv)
173
234
root_path, root_ie = entries.next()
174
235
for path, ie in entries:
175
self._append_entry(append, ie)
236
if ie.parent_id != self.root_id:
237
parent_str = ' parent_id="'
238
parent_id = _encode_and_escape(ie.parent_id)
242
if ie.kind == 'file':
244
executable = ' executable="yes"'
248
append('<file%s file_id="%s name="%s%s%s revision="%s '
249
'text_sha1="%s" text_size="%d" />\n' % (
250
executable, _encode_and_escape(ie.file_id),
251
_encode_and_escape(ie.name), parent_str, parent_id,
252
_encode_and_escape(ie.revision), ie.text_sha1,
255
append('<file%s file_id="%s name="%s%s%s />\n' % (
256
executable, _encode_and_escape(ie.file_id),
257
_encode_and_escape(ie.name), parent_str, parent_id))
258
elif ie.kind == 'directory':
260
append('<directory file_id="%s name="%s%s%s revision="%s '
262
_encode_and_escape(ie.file_id),
263
_encode_and_escape(ie.name),
264
parent_str, parent_id,
265
_encode_and_escape(ie.revision)))
267
append('<directory file_id="%s name="%s%s%s />\n' % (
268
_encode_and_escape(ie.file_id),
269
_encode_and_escape(ie.name),
270
parent_str, parent_id))
271
elif ie.kind == 'symlink':
273
append('<symlink file_id="%s name="%s%s%s revision="%s '
274
'symlink_target="%s />\n' % (
275
_encode_and_escape(ie.file_id),
276
_encode_and_escape(ie.name),
277
parent_str, parent_id,
278
_encode_and_escape(ie.revision),
279
_encode_and_escape(ie.symlink_target)))
281
append('<symlink file_id="%s name="%s%s%s />\n' % (
282
_encode_and_escape(ie.file_id),
283
_encode_and_escape(ie.name),
284
parent_str, parent_id))
285
elif ie.kind == 'tree-reference':
286
if ie.kind not in self.supported_kinds:
287
raise errors.UnsupportedInventoryKind(ie.kind)
289
append('<tree-reference file_id="%s name="%s%s%s '
290
'revision="%s reference_revision="%s />\n' % (
291
_encode_and_escape(ie.file_id),
292
_encode_and_escape(ie.name),
293
parent_str, parent_id,
294
_encode_and_escape(ie.revision),
295
_encode_and_escape(ie.reference_revision)))
297
append('<tree-reference file_id="%s name="%s%s%s />\n' % (
298
_encode_and_escape(ie.file_id),
299
_encode_and_escape(ie.name),
300
parent_str, parent_id))
302
raise errors.UnsupportedInventoryKind(ie.kind)
176
303
append('</inventory>\n')
178
306
# Just to keep the cache from growing without bounds
179
307
# but we may actually not want to do clear the cache
182
311
def _append_inventory_root(self, append, inv):
183
312
"""Append the inventory root to output."""
185
if inv.root.file_id not in (None, ROOT_ID):
187
append(_encode_and_escape(inv.root.file_id))
188
append(' format="5"')
189
313
if inv.revision_id is not None:
190
append(' revision_id="')
191
append(_encode_and_escape(inv.revision_id))
194
def _append_entry(self, append, ie):
195
"""Convert InventoryEntry to XML element and append to output."""
196
# TODO: should just be a plain assertion
197
if ie.kind not in self.supported_kinds:
198
raise errors.UnsupportedInventoryKind(ie.kind)
203
append(' executable="yes"')
205
append(_encode_and_escape(ie.file_id))
207
append(_encode_and_escape(ie.name))
208
if self._parent_condition(ie):
209
assert isinstance(ie.parent_id, basestring)
210
append(' parent_id="')
211
append(_encode_and_escape(ie.parent_id))
212
if ie.revision is not None:
213
append(' revision="')
214
append(_encode_and_escape(ie.revision))
215
if ie.symlink_target is not None:
216
append(' symlink_target="')
217
append(_encode_and_escape(ie.symlink_target))
218
if ie.text_sha1 is not None:
219
append(' text_sha1="')
222
if ie.text_size is not None:
223
append(' text_size="%d"' % ie.text_size)
224
if getattr(ie, 'reference_revision', None) is not None:
225
append(' reference_revision="')
226
append(_encode_and_escape(ie.reference_revision))
230
def _parent_condition(self, ie):
231
return ie.parent_id != ROOT_ID
314
revid1 = ' revision_id="'
315
revid2 = _encode_and_escape(inv.revision_id)
319
append('<inventory format="%s"%s%s>\n' % (
320
self.format_num, revid1, revid2))
321
append('<directory file_id="%s name="%s revision="%s />\n' % (
322
_encode_and_escape(inv.root.file_id),
323
_encode_and_escape(inv.root.name),
324
_encode_and_escape(inv.root.revision)))
233
326
def _pack_revision(self, rev):
234
327
"""Revision object -> xml tree"""
239
332
revision_id = rev.revision_id
240
333
if isinstance(revision_id, str):
241
334
revision_id = decode_utf8(revision_id)
335
format_num = self.format_num
336
if self.revision_format_num is not None:
337
format_num = self.revision_format_num
242
338
root = Element('revision',
243
339
committer = rev.committer,
244
340
timestamp = '%.3f' % rev.timestamp,
245
341
revision_id = revision_id,
246
342
inventory_sha1 = rev.inventory_sha1,
249
345
if rev.timezone is not None:
250
346
root.set('timezone', str(rev.timezone))
252
348
msg = SubElement(root, 'message')
253
msg.text = rev.message
349
msg.text = escape_invalid_chars(rev.message)[0]
255
351
if rev.parent_ids:
256
352
pelts = SubElement(root, 'parents')
257
353
pelts.tail = pelts.text = '\n'
258
354
for parent_id in rev.parent_ids:
259
assert isinstance(parent_id, basestring)
260
355
_mod_revision.check_not_reserved_id(parent_id)
261
356
p = SubElement(pelts, 'revision_ref')
270
365
def _pack_revision_properties(self, rev, under_element):
271
366
top_elt = SubElement(under_element, 'properties')
272
367
for prop_name, prop_value in sorted(rev.properties.items()):
273
assert isinstance(prop_name, basestring)
274
assert isinstance(prop_value, basestring)
275
368
prop_elt = SubElement(top_elt, 'property')
276
369
prop_elt.set('name', prop_name)
277
370
prop_elt.text = prop_value
278
371
prop_elt.tail = '\n'
279
372
top_elt.tail = '\n'
281
def _unpack_inventory(self, elt):
282
"""Construct from XML Element
284
assert elt.tag == 'inventory'
285
root_id = elt.get('file_id') or ROOT_ID
286
root_id = _get_utf8_or_ascii(root_id)
374
def _unpack_inventory(self, elt, revision_id=None, entry_cache=None,
375
return_from_cache=False):
376
"""Construct from XML Element"""
377
if elt.tag != 'inventory':
378
raise errors.UnexpectedInventoryFormat('Root tag is %r' % elt.tag)
288
379
format = elt.get('format')
289
if format is not None:
291
raise BzrError("invalid format version %r on inventory"
380
if format != self.format_num:
381
raise errors.UnexpectedInventoryFormat('Invalid format version %r'
293
383
revision_id = elt.get('revision_id')
294
384
if revision_id is not None:
295
385
revision_id = cache_utf8.encode(revision_id)
296
inv = Inventory(root_id, revision_id=revision_id)
386
inv = inventory.Inventory(root_id=None, revision_id=revision_id)
298
ie = self._unpack_entry(e)
299
if ie.parent_id is None:
300
ie.parent_id = root_id
388
ie = self._unpack_entry(e, entry_cache=entry_cache,
389
return_from_cache=return_from_cache)
391
self._check_cache_size(len(inv), entry_cache)
304
def _unpack_entry(self, elt):
394
def _unpack_entry(self, elt, entry_cache=None, return_from_cache=False):
396
file_id = elt_get('file_id')
397
revision = elt_get('revision')
398
# Check and see if we have already unpacked this exact entry
399
# Some timings for "repo.revision_trees(last_100_revs)"
401
# unmodified 4.1s 40.8s
403
# using fifo 2.83s 29.1s
407
# no_copy 2.00s 20.5s
408
# no_c,dict 1.95s 18.0s
409
# Note that a cache of 10k nodes is more than sufficient to hold all of
410
# the inventory for the last 100 revs for bzr, but not for mysql (20k
411
# is enough for mysql, which saves the same 2s as using a dict)
413
# Breakdown of mysql using time.clock()
414
# 4.1s 2 calls to element.get for file_id, revision_id
415
# 4.5s cache_hit lookup
416
# 7.1s InventoryFile.copy()
417
# 2.4s InventoryDirectory.copy()
418
# 0.4s decoding unique entries
419
# 1.6s decoding entries after FIFO fills up
420
# 0.8s Adding nodes to FIFO (including flushes)
421
# 0.1s cache miss lookups
423
# 4.1s 2 calls to element.get for file_id, revision_id
424
# 9.9s cache_hit lookup
425
# 10.8s InventoryEntry.copy()
426
# 0.3s cache miss lookus
427
# 1.2s decoding entries
428
# 1.0s adding nodes to LRU
429
if entry_cache is not None and revision is not None:
430
key = (file_id, revision)
432
# We copy it, because some operations may mutate it
433
cached_ie = entry_cache[key]
437
# Only copying directory entries drops us 2.85s => 2.35s
438
if return_from_cache:
439
if cached_ie.kind == 'directory':
440
return cached_ie.copy()
442
return cached_ie.copy()
306
445
if not InventoryEntry.versionable_kind(kind):
307
446
raise AssertionError('unsupported entry kind %s' % kind)
309
448
get_cached = _get_utf8_or_ascii
311
parent_id = elt.get('parent_id')
450
file_id = get_cached(file_id)
451
if revision is not None:
452
revision = get_cached(revision)
453
parent_id = elt_get('parent_id')
312
454
if parent_id is not None:
313
455
parent_id = get_cached(parent_id)
314
file_id = get_cached(elt.get('file_id'))
316
457
if kind == 'directory':
317
458
ie = inventory.InventoryDirectory(file_id,
320
461
elif kind == 'file':
321
462
ie = inventory.InventoryFile(file_id,
324
ie.text_sha1 = elt.get('text_sha1')
325
if elt.get('executable') == 'yes':
465
ie.text_sha1 = elt_get('text_sha1')
466
if elt_get('executable') == 'yes':
326
467
ie.executable = True
327
v = elt.get('text_size')
468
v = elt_get('text_size')
328
469
ie.text_size = v and int(v)
329
470
elif kind == 'symlink':
330
471
ie = inventory.InventoryLink(file_id,
333
ie.symlink_target = elt.get('symlink_target')
474
ie.symlink_target = elt_get('symlink_target')
335
476
raise errors.UnsupportedInventoryKind(kind)
336
revision = elt.get('revision')
337
if revision is not None:
338
revision = get_cached(revision)
339
477
ie.revision = revision
478
if revision is not None and entry_cache is not None:
479
# We cache a copy() because callers like to mutate objects, and
480
# that would cause the item in cache to mutate as well.
481
# This has a small effect on many-inventory performance, because
482
# the majority fraction is spent in cache hits, not misses.
483
entry_cache[key] = ie.copy()
343
487
def _unpack_revision(self, elt):
344
488
"""XML Element -> Revision object"""
345
assert elt.tag == 'revision'
346
489
format = elt.get('format')
490
format_num = self.format_num
491
if self.revision_format_num is not None:
492
format_num = self.revision_format_num
347
493
if format is not None:
349
raise BzrError("invalid format version %r on inventory"
494
if format != format_num:
495
raise BzrError("invalid format version %r on revision"
351
497
get_cached = _get_utf8_or_ascii
352
498
rev = Revision(committer = elt.get('committer'),