2391
2346
:param revision_ids: The expected revision ids of the inventories.
2392
:param ordering: optional ordering, e.g. 'topological'. If not
2393
specified, the order of revision_ids will be preserved (by
2394
buffering if necessary).
2395
2347
:return: An iterator of inventories.
2397
2349
if ((None in revision_ids)
2398
2350
or (_mod_revision.NULL_REVISION in revision_ids)):
2399
2351
raise ValueError('cannot get null revision inventory')
2400
return self._iter_inventories(revision_ids, ordering)
2352
return self._iter_inventories(revision_ids)
2402
def _iter_inventories(self, revision_ids, ordering):
2354
def _iter_inventories(self, revision_ids):
2403
2355
"""single-document based inventory iteration."""
2404
inv_xmls = self._iter_inventory_xmls(revision_ids, ordering)
2405
for text, revision_id in inv_xmls:
2406
yield self._deserialise_inventory(revision_id, text)
2356
for text, revision_id in self._iter_inventory_xmls(revision_ids):
2357
yield self.deserialise_inventory(revision_id, text)
2408
def _iter_inventory_xmls(self, revision_ids, ordering):
2409
if ordering is None:
2410
order_as_requested = True
2411
ordering = 'unordered'
2413
order_as_requested = False
2359
def _iter_inventory_xmls(self, revision_ids):
2414
2360
keys = [(revision_id,) for revision_id in revision_ids]
2417
if order_as_requested:
2418
key_iter = iter(keys)
2419
next_key = key_iter.next()
2420
stream = self.inventories.get_record_stream(keys, ordering, True)
2361
stream = self.inventories.get_record_stream(keys, 'unordered', True)
2421
2362
text_chunks = {}
2422
2363
for record in stream:
2423
2364
if record.storage_kind != 'absent':
2424
chunks = record.get_bytes_as('chunked')
2425
if order_as_requested:
2426
text_chunks[record.key] = chunks
2428
yield ''.join(chunks), record.key[-1]
2365
text_chunks[record.key] = record.get_bytes_as('chunked')
2430
2367
raise errors.NoSuchRevision(self, record.key)
2431
if order_as_requested:
2432
# Yield as many results as we can while preserving order.
2433
while next_key in text_chunks:
2434
chunks = text_chunks.pop(next_key)
2435
yield ''.join(chunks), next_key[-1]
2437
next_key = key_iter.next()
2438
except StopIteration:
2439
# We still want to fully consume the get_record_stream,
2440
# just in case it is not actually finished at this point
2369
chunks = text_chunks.pop(key)
2370
yield ''.join(chunks), key[-1]
2444
def _deserialise_inventory(self, revision_id, xml):
2372
def deserialise_inventory(self, revision_id, xml):
2445
2373
"""Transform the xml into an inventory object.
2447
2375
:param revision_id: The expected revision id of the inventory.
2448
2376
:param xml: A serialised inventory.
2450
2378
result = self._serializer.read_inventory_from_string(xml, revision_id,
2451
entry_cache=self._inventory_entry_cache,
2452
return_from_cache=self._safe_to_return_from_cache)
2379
entry_cache=self._inventory_entry_cache)
2453
2380
if result.revision_id != revision_id:
2454
2381
raise AssertionError('revision id mismatch %s != %s' % (
2455
2382
result.revision_id, revision_id))
2385
def serialise_inventory(self, inv):
2386
return self._serializer.write_inventory_to_string(inv)
2388
def _serialise_inventory_to_lines(self, inv):
2389
return self._serializer.write_inventory_to_lines(inv)
2458
2391
def get_serializer_format(self):
2459
2392
return self._serializer.format_num
2461
2394
@needs_read_lock
2462
def _get_inventory_xml(self, revision_id):
2463
"""Get serialized inventory as a string."""
2464
texts = self._iter_inventory_xmls([revision_id], 'unordered')
2395
def get_inventory_xml(self, revision_id):
2396
"""Get inventory XML as a file object."""
2397
texts = self._iter_inventory_xmls([revision_id])
2466
2399
text, revision_id = texts.next()
2467
2400
except StopIteration:
2468
2401
raise errors.HistoryMissing(self, 'inventory', revision_id)
2405
def get_inventory_sha1(self, revision_id):
2406
"""Return the sha1 hash of the inventory entry
2408
return self.get_revision(revision_id).inventory_sha1
2471
2410
def get_rev_id_for_revno(self, revno, known_pair):
2472
2411
"""Return the revision id of a revno, given a later (revno, revid)
2473
2412
pair in the same history.
3752
3660
# This is redundant with format.check_conversion_target(), however that
3753
3661
# raises an exception, and we just want to say "False" as in we won't
3754
3662
# support converting between these formats.
3755
if 'IDS_never' in debug.debug_flags:
3757
3663
if source.supports_rich_root() and not target.supports_rich_root():
3759
3665
if (source._format.supports_tree_reference
3760
3666
and not target._format.supports_tree_reference):
3762
if target._fallback_repositories and target._format.supports_chks:
3763
# IDS doesn't know how to copy CHKs for the parent inventories it
3764
# adds to stacked repos.
3766
if 'IDS_always' in debug.debug_flags:
3768
# Only use this code path for local source and target. IDS does far
3769
# too much IO (both bandwidth and roundtrips) over a network.
3770
if not source.bzrdir.transport.base.startswith('file:///'):
3772
if not target.bzrdir.transport.base.startswith('file:///'):
3776
def _get_trees(self, revision_ids, cache):
3778
for rev_id in revision_ids:
3780
possible_trees.append((rev_id, cache[rev_id]))
3782
# Not cached, but inventory might be present anyway.
3784
tree = self.source.revision_tree(rev_id)
3785
except errors.NoSuchRevision:
3786
# Nope, parent is ghost.
3789
cache[rev_id] = tree
3790
possible_trees.append((rev_id, tree))
3791
return possible_trees
3793
def _get_delta_for_revision(self, tree, parent_ids, possible_trees):
3670
def _get_delta_for_revision(self, tree, parent_ids, basis_id, cache):
3794
3671
"""Get the best delta and base for this revision.
3796
3673
:return: (basis_id, delta)
3675
possible_trees = [(parent_id, cache[parent_id])
3676
for parent_id in parent_ids
3677
if parent_id in cache]
3678
if len(possible_trees) == 0:
3679
# There either aren't any parents, or the parents aren't in the
3680
# cache, so just use the last converted tree
3681
possible_trees.append((basis_id, cache[basis_id]))
3799
# Generate deltas against each tree, to find the shortest.
3800
texts_possibly_new_in_tree = set()
3801
3683
for basis_id, basis_tree in possible_trees:
3802
3684
delta = tree.inventory._make_delta(basis_tree.inventory)
3803
for old_path, new_path, file_id, new_entry in delta:
3804
if new_path is None:
3805
# This file_id isn't present in the new rev, so we don't
3809
# Rich roots are handled elsewhere...
3811
kind = new_entry.kind
3812
if kind != 'directory' and kind != 'file':
3813
# No text record associated with this inventory entry.
3815
# This is a directory or file that has changed somehow.
3816
texts_possibly_new_in_tree.add((file_id, new_entry.revision))
3817
3685
deltas.append((len(delta), basis_id, delta))
3819
3687
return deltas[0][1:]
3821
def _fetch_parent_invs_for_stacking(self, parent_map, cache):
3822
"""Find all parent revisions that are absent, but for which the
3823
inventory is present, and copy those inventories.
3825
This is necessary to preserve correctness when the source is stacked
3826
without fallbacks configured. (Note that in cases like upgrade the
3827
source may be not have _fallback_repositories even though it is
3831
for parents in parent_map.values():
3832
parent_revs.update(parents)
3833
present_parents = self.source.get_parent_map(parent_revs)
3834
absent_parents = set(parent_revs).difference(present_parents)
3835
parent_invs_keys_for_stacking = self.source.inventories.get_parent_map(
3836
(rev_id,) for rev_id in absent_parents)
3837
parent_inv_ids = [key[-1] for key in parent_invs_keys_for_stacking]
3838
for parent_tree in self.source.revision_trees(parent_inv_ids):
3839
current_revision_id = parent_tree.get_revision_id()
3840
parents_parents_keys = parent_invs_keys_for_stacking[
3841
(current_revision_id,)]
3842
parents_parents = [key[-1] for key in parents_parents_keys]
3843
basis_id = _mod_revision.NULL_REVISION
3844
basis_tree = self.source.revision_tree(basis_id)
3845
delta = parent_tree.inventory._make_delta(basis_tree.inventory)
3846
self.target.add_inventory_by_delta(
3847
basis_id, delta, current_revision_id, parents_parents)
3848
cache[current_revision_id] = parent_tree
3850
def _fetch_batch(self, revision_ids, basis_id, cache, a_graph=None):
3689
def _get_parent_keys(self, root_key, parent_map):
3690
"""Get the parent keys for a given root id."""
3691
root_id, rev_id = root_key
3692
# Include direct parents of the revision, but only if they used
3693
# the same root_id and are heads.
3695
for parent_id in parent_map[rev_id]:
3696
if parent_id == _mod_revision.NULL_REVISION:
3698
if parent_id not in self._revision_id_to_root_id:
3699
# We probably didn't read this revision, go spend the
3700
# extra effort to actually check
3702
tree = self.source.revision_tree(parent_id)
3703
except errors.NoSuchRevision:
3704
# Ghost, fill out _revision_id_to_root_id in case we
3705
# encounter this again.
3706
# But set parent_root_id to None since we don't really know
3707
parent_root_id = None
3709
parent_root_id = tree.get_root_id()
3710
self._revision_id_to_root_id[parent_id] = None
3712
parent_root_id = self._revision_id_to_root_id[parent_id]
3713
if root_id == parent_root_id:
3714
# With stacking we _might_ want to refer to a non-local
3715
# revision, but this code path only applies when we have the
3716
# full content available, so ghosts really are ghosts, not just
3717
# the edge of local data.
3718
parent_keys.append((parent_id,))
3720
# root_id may be in the parent anyway.
3722
tree = self.source.revision_tree(parent_id)
3723
except errors.NoSuchRevision:
3724
# ghost, can't refer to it.
3728
parent_keys.append((tree.inventory[root_id].revision,))
3729
except errors.NoSuchId:
3732
g = graph.Graph(self.source.revisions)
3733
heads = g.heads(parent_keys)
3735
for key in parent_keys:
3736
if key in heads and key not in selected_keys:
3737
selected_keys.append(key)
3738
return tuple([(root_id,)+ key for key in selected_keys])
3740
def _new_root_data_stream(self, root_keys_to_create, parent_map):
3741
for root_key in root_keys_to_create:
3742
parent_keys = self._get_parent_keys(root_key, parent_map)
3743
yield versionedfile.FulltextContentFactory(root_key,
3744
parent_keys, None, '')
3746
def _fetch_batch(self, revision_ids, basis_id, cache):
3851
3747
"""Fetch across a few revisions.
3853
3749
:param revision_ids: The revisions to copy
3854
3750
:param basis_id: The revision_id of a tree that must be in cache, used
3855
3751
as a basis for delta when no other base is available
3856
3752
:param cache: A cache of RevisionTrees that we can use.
3857
:param a_graph: A Graph object to determine the heads() of the
3858
rich-root data stream.
3859
3753
:return: The revision_id of the last converted tree. The RevisionTree
3860
3754
for it will be in cache
3867
3761
pending_deltas = []
3868
3762
pending_revisions = []
3869
3763
parent_map = self.source.get_parent_map(revision_ids)
3870
self._fetch_parent_invs_for_stacking(parent_map, cache)
3871
self.source._safe_to_return_from_cache = True
3872
3764
for tree in self.source.revision_trees(revision_ids):
3873
# Find a inventory delta for this revision.
3874
# Find text entries that need to be copied, too.
3875
3765
current_revision_id = tree.get_revision_id()
3876
3766
parent_ids = parent_map.get(current_revision_id, ())
3877
parent_trees = self._get_trees(parent_ids, cache)
3878
possible_trees = list(parent_trees)
3879
if len(possible_trees) == 0:
3880
# There either aren't any parents, or the parents are ghosts,
3881
# so just use the last converted tree.
3882
possible_trees.append((basis_id, cache[basis_id]))
3883
3767
basis_id, delta = self._get_delta_for_revision(tree, parent_ids,
3885
revision = self.source.get_revision(current_revision_id)
3886
pending_deltas.append((basis_id, delta,
3887
current_revision_id, revision.parent_ids))
3888
3769
if self._converting_to_rich_root:
3889
3770
self._revision_id_to_root_id[current_revision_id] = \
3890
3771
tree.get_root_id()
3891
# Determine which texts are in present in this revision but not in
3892
# any of the available parents.
3893
texts_possibly_new_in_tree = set()
3772
# Find text entries that need to be copied
3894
3773
for old_path, new_path, file_id, entry in delta:
3895
if new_path is None:
3896
# This file_id isn't present in the new rev
3900
if not self.target.supports_rich_root():
3901
# The target doesn't support rich root, so we don't
3904
if self._converting_to_rich_root:
3905
# This can't be copied normally, we have to insert
3907
root_keys_to_create.add((file_id, entry.revision))
3910
texts_possibly_new_in_tree.add((file_id, entry.revision))
3911
for basis_id, basis_tree in possible_trees:
3912
basis_inv = basis_tree.inventory
3913
for file_key in list(texts_possibly_new_in_tree):
3914
file_id, file_revision = file_key
3916
entry = basis_inv[file_id]
3917
except errors.NoSuchId:
3919
if entry.revision == file_revision:
3920
texts_possibly_new_in_tree.remove(file_key)
3921
text_keys.update(texts_possibly_new_in_tree)
3774
if new_path is not None:
3777
if not self.target.supports_rich_root():
3778
# The target doesn't support rich root, so we don't
3781
if self._converting_to_rich_root:
3782
# This can't be copied normally, we have to insert
3784
root_keys_to_create.add((file_id, entry.revision))
3786
text_keys.add((file_id, entry.revision))
3787
revision = self.source.get_revision(current_revision_id)
3788
pending_deltas.append((basis_id, delta,
3789
current_revision_id, revision.parent_ids))
3922
3790
pending_revisions.append(revision)
3923
3791
cache[current_revision_id] = tree
3924
3792
basis_id = current_revision_id
3925
self.source._safe_to_return_from_cache = False
3926
3793
# Copy file texts
3927
3794
from_texts = self.source.texts
3928
3795
to_texts = self.target.texts
3929
3796
if root_keys_to_create:
3930
root_stream = _mod_fetch._new_root_data_stream(
3931
root_keys_to_create, self._revision_id_to_root_id, parent_map,
3932
self.source, graph=a_graph)
3797
root_stream = self._new_root_data_stream(root_keys_to_create,
3933
3799
to_texts.insert_record_stream(root_stream)
3934
3800
to_texts.insert_record_stream(from_texts.get_record_stream(
3935
3801
text_keys, self.target._format._fetch_order,
4597
4403
return (not self.from_repository._format.rich_root_data and
4598
4404
self.to_format.rich_root_data)
4600
def _get_inventory_stream(self, revision_ids, missing=False):
4406
def _get_inventory_stream(self, revision_ids):
4601
4407
from_format = self.from_repository._format
4602
if (from_format.supports_chks and self.to_format.supports_chks and
4603
from_format.network_name() == self.to_format.network_name()):
4604
raise AssertionError(
4605
"this case should be handled by GroupCHKStreamSource")
4606
elif 'forceinvdeltas' in debug.debug_flags:
4607
return self._get_convertable_inventory_stream(revision_ids,
4608
delta_versus_null=missing)
4609
elif from_format.network_name() == self.to_format.network_name():
4611
return self._get_simple_inventory_stream(revision_ids,
4613
elif (not from_format.supports_chks and not self.to_format.supports_chks
4614
and from_format._serializer == self.to_format._serializer):
4615
# Essentially the same format.
4616
return self._get_simple_inventory_stream(revision_ids,
4408
if (from_format.supports_chks and self.to_format.supports_chks
4409
and (from_format._serializer == self.to_format._serializer)):
4410
# Both sides support chks, and they use the same serializer, so it
4411
# is safe to transmit the chk pages and inventory pages across
4413
return self._get_chk_inventory_stream(revision_ids)
4414
elif (not from_format.supports_chks):
4415
# Source repository doesn't support chks. So we can transmit the
4416
# inventories 'as-is' and either they are just accepted on the
4417
# target, or the Sink will properly convert it.
4418
return self._get_simple_inventory_stream(revision_ids)
4619
# Any time we switch serializations, we want to use an
4620
# inventory-delta based approach.
4621
return self._get_convertable_inventory_stream(revision_ids,
4622
delta_versus_null=missing)
4420
# XXX: Hack to make not-chk->chk fetch: copy the inventories as
4421
# inventories. Note that this should probably be done somehow
4422
# as part of bzrlib.repository.StreamSink. Except JAM couldn't
4423
# figure out how a non-chk repository could possibly handle
4424
# deserializing an inventory stream from a chk repo, as it
4425
# doesn't have a way to understand individual pages.
4426
return self._get_convertable_inventory_stream(revision_ids)
4624
def _get_simple_inventory_stream(self, revision_ids, missing=False):
4625
# NB: This currently reopens the inventory weave in source;
4626
# using a single stream interface instead would avoid this.
4428
def _get_simple_inventory_stream(self, revision_ids):
4627
4429
from_weave = self.from_repository.inventories
4629
delta_closure = True
4631
delta_closure = not self.delta_on_metadata()
4632
4430
yield ('inventories', from_weave.get_record_stream(
4633
4431
[(rev_id,) for rev_id in revision_ids],
4634
self.inventory_fetch_order(), delta_closure))
4636
def _get_convertable_inventory_stream(self, revision_ids,
4637
delta_versus_null=False):
4638
# The two formats are sufficiently different that there is no fast
4639
# path, so we need to send just inventorydeltas, which any
4640
# sufficiently modern client can insert into any repository.
4641
# The StreamSink code expects to be able to
4642
# convert on the target, so we need to put bytes-on-the-wire that can
4643
# be converted. That means inventory deltas (if the remote is <1.19,
4644
# RemoteStreamSink will fallback to VFS to insert the deltas).
4645
yield ('inventory-deltas',
4646
self._stream_invs_as_deltas(revision_ids,
4647
delta_versus_null=delta_versus_null))
4649
def _stream_invs_as_deltas(self, revision_ids, delta_versus_null=False):
4650
"""Return a stream of inventory-deltas for the given rev ids.
4652
:param revision_ids: The list of inventories to transmit
4653
:param delta_versus_null: Don't try to find a minimal delta for this
4654
entry, instead compute the delta versus the NULL_REVISION. This
4655
effectively streams a complete inventory. Used for stuff like
4656
filling in missing parents, etc.
4432
self.inventory_fetch_order(),
4433
not self.delta_on_metadata()))
4435
def _get_chk_inventory_stream(self, revision_ids):
4436
"""Fetch the inventory texts, along with the associated chk maps."""
4437
# We want an inventory outside of the search set, so that we can filter
4438
# out uninteresting chk pages. For now we use
4439
# _find_revision_outside_set, but if we had a Search with cut_revs, we
4440
# could use that instead.
4441
start_rev_id = self.from_repository._find_revision_outside_set(
4443
start_rev_key = (start_rev_id,)
4444
inv_keys_to_fetch = [(rev_id,) for rev_id in revision_ids]
4445
if start_rev_id != _mod_revision.NULL_REVISION:
4446
inv_keys_to_fetch.append((start_rev_id,))
4447
# Any repo that supports chk_bytes must also support out-of-order
4448
# insertion. At least, that is how we expect it to work
4449
# We use get_record_stream instead of iter_inventories because we want
4450
# to be able to insert the stream as well. We could instead fetch
4451
# allowing deltas, and then iter_inventories, but we don't know whether
4452
# source or target is more 'local' anway.
4453
inv_stream = self.from_repository.inventories.get_record_stream(
4454
inv_keys_to_fetch, 'unordered',
4455
True) # We need them as full-texts so we can find their references
4456
uninteresting_chk_roots = set()
4457
interesting_chk_roots = set()
4458
def filter_inv_stream(inv_stream):
4459
for idx, record in enumerate(inv_stream):
4460
### child_pb.update('fetch inv', idx, len(inv_keys_to_fetch))
4461
bytes = record.get_bytes_as('fulltext')
4462
chk_inv = inventory.CHKInventory.deserialise(
4463
self.from_repository.chk_bytes, bytes, record.key)
4464
if record.key == start_rev_key:
4465
uninteresting_chk_roots.add(chk_inv.id_to_entry.key())
4466
p_id_map = chk_inv.parent_id_basename_to_file_id
4467
if p_id_map is not None:
4468
uninteresting_chk_roots.add(p_id_map.key())
4471
interesting_chk_roots.add(chk_inv.id_to_entry.key())
4472
p_id_map = chk_inv.parent_id_basename_to_file_id
4473
if p_id_map is not None:
4474
interesting_chk_roots.add(p_id_map.key())
4475
### pb.update('fetch inventory', 0, 2)
4476
yield ('inventories', filter_inv_stream(inv_stream))
4477
# Now that we have worked out all of the interesting root nodes, grab
4478
# all of the interesting pages and insert them
4479
### pb.update('fetch inventory', 1, 2)
4480
interesting = chk_map.iter_interesting_nodes(
4481
self.from_repository.chk_bytes, interesting_chk_roots,
4482
uninteresting_chk_roots)
4483
def to_stream_adapter():
4484
"""Adapt the iter_interesting_nodes result to a single stream.
4486
iter_interesting_nodes returns records as it processes them, along
4487
with keys. However, we only want to return the records themselves.
4489
for record, items in interesting:
4490
if record is not None:
4492
# XXX: We could instead call get_record_stream(records.keys())
4493
# ATM, this will always insert the records as fulltexts, and
4494
# requires that you can hang on to records once you have gone
4495
# on to the next one. Further, it causes the target to
4496
# recompress the data. Testing shows it to be faster than
4497
# requesting the records again, though.
4498
yield ('chk_bytes', to_stream_adapter())
4499
### pb.update('fetch inventory', 2, 2)
4501
def _get_convertable_inventory_stream(self, revision_ids):
4502
# XXX: One of source or target is using chks, and they don't have
4503
# compatible serializations. The StreamSink code expects to be
4504
# able to convert on the target, so we need to put
4505
# bytes-on-the-wire that can be converted
4506
yield ('inventories', self._stream_invs_as_fulltexts(revision_ids))
4508
def _stream_invs_as_fulltexts(self, revision_ids):
4658
4509
from_repo = self.from_repository
4510
from_serializer = from_repo._format._serializer
4659
4511
revision_keys = [(rev_id,) for rev_id in revision_ids]
4660
4512
parent_map = from_repo.inventories.get_parent_map(revision_keys)
4661
# XXX: possibly repos could implement a more efficient iter_inv_deltas
4663
inventories = self.from_repository.iter_inventories(
4664
revision_ids, 'topological')
4665
format = from_repo._format
4666
invs_sent_so_far = set([_mod_revision.NULL_REVISION])
4667
inventory_cache = lru_cache.LRUCache(50)
4668
null_inventory = from_repo.revision_tree(
4669
_mod_revision.NULL_REVISION).inventory
4670
# XXX: ideally the rich-root/tree-refs flags would be per-revision, not
4671
# per-repo (e.g. streaming a non-rich-root revision out of a rich-root
4672
# repo back into a non-rich-root repo ought to be allowed)
4673
serializer = inventory_delta.InventoryDeltaSerializer(
4674
versioned_root=format.rich_root_data,
4675
tree_references=format.supports_tree_reference)
4676
for inv in inventories:
4513
for inv in self.from_repository.iter_inventories(revision_ids):
4514
# XXX: This is a bit hackish, but it works. Basically,
4515
# CHKSerializer 'accidentally' supports
4516
# read/write_inventory_to_string, even though that is never
4517
# the format that is stored on disk. It *does* give us a
4518
# single string representation for an inventory, so live with
4520
# This would be far better if we had a 'serialized inventory
4521
# delta' form. Then we could use 'inventory._make_delta', and
4522
# transmit that. This would both be faster to generate, and
4523
# result in fewer bytes-on-the-wire.
4524
as_bytes = from_serializer.write_inventory_to_string(inv)
4677
4525
key = (inv.revision_id,)
4678
4526
parent_keys = parent_map.get(key, ())
4680
if not delta_versus_null and parent_keys:
4681
# The caller did not ask for complete inventories and we have
4682
# some parents that we can delta against. Make a delta against
4683
# each parent so that we can find the smallest.
4684
parent_ids = [parent_key[0] for parent_key in parent_keys]
4685
for parent_id in parent_ids:
4686
if parent_id not in invs_sent_so_far:
4687
# We don't know that the remote side has this basis, so
4690
if parent_id == _mod_revision.NULL_REVISION:
4691
parent_inv = null_inventory
4693
parent_inv = inventory_cache.get(parent_id, None)
4694
if parent_inv is None:
4695
parent_inv = from_repo.get_inventory(parent_id)
4696
candidate_delta = inv._make_delta(parent_inv)
4697
if (delta is None or
4698
len(delta) > len(candidate_delta)):
4699
delta = candidate_delta
4700
basis_id = parent_id
4702
# Either none of the parents ended up being suitable, or we
4703
# were asked to delta against NULL
4704
basis_id = _mod_revision.NULL_REVISION
4705
delta = inv._make_delta(null_inventory)
4706
invs_sent_so_far.add(inv.revision_id)
4707
inventory_cache[inv.revision_id] = inv
4708
delta_serialized = ''.join(
4709
serializer.delta_to_lines(basis_id, key[-1], delta))
4710
4527
yield versionedfile.FulltextContentFactory(
4711
key, parent_keys, None, delta_serialized)
4528
key, parent_keys, None, as_bytes)
4714
4531
def _iter_for_revno(repo, partial_history_cache, stop_index=None,