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'])
156
def write_inventory_to_string(self, inv):
157
"""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.
158
213
sio = cStringIO.StringIO()
159
self.write_inventory(inv, sio)
214
self.write_inventory(inv, sio, working)
160
215
return sio.getvalue()
162
def write_inventory(self, inv, f):
217
def write_inventory(self, inv, f, working=False):
163
218
"""Write inventory to a file.
165
220
:param inv: the inventory to write.
166
: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.
168
227
_ensure_utf8_re()
228
self._check_revisions(inv)
170
230
append = output.append
171
231
self._append_inventory_root(append, inv)
174
234
root_path, root_ie = entries.next()
175
235
for path, ie in entries:
176
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)
177
303
append('</inventory>\n')
179
306
# Just to keep the cache from growing without bounds
180
307
# but we may actually not want to do clear the cache
183
311
def _append_inventory_root(self, append, inv):
184
312
"""Append the inventory root to output."""
186
if inv.root.file_id not in (None, ROOT_ID):
188
append(_encode_and_escape(inv.root.file_id))
189
append(' format="5"')
190
313
if inv.revision_id is not None:
191
append(' revision_id="')
192
append(_encode_and_escape(inv.revision_id))
195
def _append_entry(self, append, ie):
196
"""Convert InventoryEntry to XML element and append to output."""
197
# TODO: should just be a plain assertion
198
if ie.kind not in self.supported_kinds:
199
raise errors.UnsupportedInventoryKind(ie.kind)
204
append(' executable="yes"')
206
append(_encode_and_escape(ie.file_id))
208
append(_encode_and_escape(ie.name))
209
if self._parent_condition(ie):
210
assert isinstance(ie.parent_id, basestring)
211
append(' parent_id="')
212
append(_encode_and_escape(ie.parent_id))
213
if ie.revision is not None:
214
append(' revision="')
215
append(_encode_and_escape(ie.revision))
216
if ie.symlink_target is not None:
217
append(' symlink_target="')
218
append(_encode_and_escape(ie.symlink_target))
219
if ie.text_sha1 is not None:
220
append(' text_sha1="')
223
if ie.text_size is not None:
224
append(' text_size="%d"' % ie.text_size)
225
if getattr(ie, 'reference_revision', None) is not None:
226
append(' reference_revision="')
227
append(_encode_and_escape(ie.reference_revision))
231
def _parent_condition(self, ie):
232
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)))
234
326
def _pack_revision(self, rev):
235
327
"""Revision object -> xml tree"""
240
332
revision_id = rev.revision_id
241
333
if isinstance(revision_id, str):
242
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
243
338
root = Element('revision',
244
339
committer = rev.committer,
245
340
timestamp = '%.3f' % rev.timestamp,
246
341
revision_id = revision_id,
247
342
inventory_sha1 = rev.inventory_sha1,
250
345
if rev.timezone is not None:
251
346
root.set('timezone', str(rev.timezone))
253
348
msg = SubElement(root, 'message')
254
msg.text = rev.message
349
msg.text = escape_invalid_chars(rev.message)[0]
256
351
if rev.parent_ids:
257
352
pelts = SubElement(root, 'parents')
258
353
pelts.tail = pelts.text = '\n'
259
354
for parent_id in rev.parent_ids:
260
assert isinstance(parent_id, basestring)
261
355
_mod_revision.check_not_reserved_id(parent_id)
262
356
p = SubElement(pelts, 'revision_ref')
271
365
def _pack_revision_properties(self, rev, under_element):
272
366
top_elt = SubElement(under_element, 'properties')
273
367
for prop_name, prop_value in sorted(rev.properties.items()):
274
assert isinstance(prop_name, basestring)
275
assert isinstance(prop_value, basestring)
276
368
prop_elt = SubElement(top_elt, 'property')
277
369
prop_elt.set('name', prop_name)
278
370
prop_elt.text = prop_value
279
371
prop_elt.tail = '\n'
280
372
top_elt.tail = '\n'
282
def _unpack_inventory(self, elt):
283
"""Construct from XML Element
285
assert elt.tag == 'inventory'
286
root_id = elt.get('file_id') or ROOT_ID
287
root_id = _get_utf8_or_ascii(root_id)
374
def _unpack_inventory(self, elt, revision_id=None, entry_cache=None):
375
"""Construct from XML Element"""
376
if elt.tag != 'inventory':
377
raise errors.UnexpectedInventoryFormat('Root tag is %r' % elt.tag)
289
378
format = elt.get('format')
290
if format is not None:
292
raise BzrError("invalid format version %r on inventory"
379
if format != self.format_num:
380
raise errors.UnexpectedInventoryFormat('Invalid format version %r'
294
382
revision_id = elt.get('revision_id')
295
383
if revision_id is not None:
296
384
revision_id = cache_utf8.encode(revision_id)
297
inv = Inventory(root_id, revision_id=revision_id)
385
inv = inventory.Inventory(root_id=None, revision_id=revision_id)
299
ie = self._unpack_entry(e)
300
if ie.parent_id is None:
301
ie.parent_id = root_id
387
ie = self._unpack_entry(e, entry_cache=entry_cache)
389
self._check_cache_size(len(inv), entry_cache)
305
def _unpack_entry(self, elt):
392
def _unpack_entry(self, elt, entry_cache=None):
394
file_id = elt_get('file_id')
395
revision = elt_get('revision')
396
# Check and see if we have already unpacked this exact entry
397
# Some timings for "repo.revision_trees(last_100_revs)"
399
# unmodified 4.1s 40.8s
401
# using fifo 2.83s 29.1s
405
# no_copy 2.00s 20.5s
406
# no_c,dict 1.95s 18.0s
407
# Note that a cache of 10k nodes is more than sufficient to hold all of
408
# the inventory for the last 100 revs for bzr, but not for mysql (20k
409
# is enough for mysql, which saves the same 2s as using a dict)
411
# Breakdown of mysql using time.clock()
412
# 4.1s 2 calls to element.get for file_id, revision_id
413
# 4.5s cache_hit lookup
414
# 7.1s InventoryFile.copy()
415
# 2.4s InventoryDirectory.copy()
416
# 0.4s decoding unique entries
417
# 1.6s decoding entries after FIFO fills up
418
# 0.8s Adding nodes to FIFO (including flushes)
419
# 0.1s cache miss lookups
421
# 4.1s 2 calls to element.get for file_id, revision_id
422
# 9.9s cache_hit lookup
423
# 10.8s InventoryEntry.copy()
424
# 0.3s cache miss lookus
425
# 1.2s decoding entries
426
# 1.0s adding nodes to LRU
427
if entry_cache is not None and revision is not None:
428
key = (file_id, revision)
430
# We copy it, because some operations may mutate it
431
cached_ie = entry_cache[key]
435
# Only copying directory entries drops us 2.85s => 2.35s
436
# if cached_ie.kind == 'directory':
437
# return cached_ie.copy()
439
return cached_ie.copy()
307
442
if not InventoryEntry.versionable_kind(kind):
308
443
raise AssertionError('unsupported entry kind %s' % kind)
310
445
get_cached = _get_utf8_or_ascii
312
parent_id = elt.get('parent_id')
447
file_id = get_cached(file_id)
448
if revision is not None:
449
revision = get_cached(revision)
450
parent_id = elt_get('parent_id')
313
451
if parent_id is not None:
314
452
parent_id = get_cached(parent_id)
315
file_id = get_cached(elt.get('file_id'))
317
454
if kind == 'directory':
318
455
ie = inventory.InventoryDirectory(file_id,
321
458
elif kind == 'file':
322
459
ie = inventory.InventoryFile(file_id,
325
ie.text_sha1 = elt.get('text_sha1')
326
if elt.get('executable') == 'yes':
462
ie.text_sha1 = elt_get('text_sha1')
463
if elt_get('executable') == 'yes':
327
464
ie.executable = True
328
v = elt.get('text_size')
465
v = elt_get('text_size')
329
466
ie.text_size = v and int(v)
330
467
elif kind == 'symlink':
331
468
ie = inventory.InventoryLink(file_id,
334
ie.symlink_target = elt.get('symlink_target')
471
ie.symlink_target = elt_get('symlink_target')
336
473
raise errors.UnsupportedInventoryKind(kind)
337
revision = elt.get('revision')
338
if revision is not None:
339
revision = get_cached(revision)
340
474
ie.revision = revision
475
if revision is not None and entry_cache is not None:
476
# We cache a copy() because callers like to mutate objects, and
477
# that would cause the item in cache to mutate as well.
478
# This has a small effect on many-inventory performance, because
479
# the majority fraction is spent in cache hits, not misses.
480
entry_cache[key] = ie.copy()
344
484
def _unpack_revision(self, elt):
345
485
"""XML Element -> Revision object"""
346
assert elt.tag == 'revision'
347
486
format = elt.get('format')
487
format_num = self.format_num
488
if self.revision_format_num is not None:
489
format_num = self.revision_format_num
348
490
if format is not None:
350
raise BzrError("invalid format version %r on inventory"
491
if format != format_num:
492
raise BzrError("invalid format version %r on revision"
352
494
get_cached = _get_utf8_or_ascii
353
495
rev = Revision(committer = elt.get('committer'),