21
21
that has merged into it. As the first step of a merge, pull, or
22
22
branch operation we copy history from the source into the destination
25
The copying is done in a slightly complicated order. We don't want to
26
add a revision to the store until everything it refers to is also
27
stored, so that if a revision is present we can totally recreate it.
28
However, we can't know what files are included in a revision until we
29
read its inventory. So we query the inventory store of the source for
30
the ids we need, and then pull those ids and then return to the inventories.
28
from bzrlib.lazy_import import lazy_import
29
lazy_import(globals(), """
43
from bzrlib.revision import NULL_REVISION
36
import bzrlib.errors as errors
37
from bzrlib.errors import InstallFailed
38
from bzrlib.progress import ProgressPhase
39
from bzrlib.revision import is_null, NULL_REVISION
40
from bzrlib.symbol_versioning import (deprecated_function,
43
from bzrlib.tsort import topo_sort
44
44
from bzrlib.trace import mutter
46
from bzrlib.versionedfile import filter_absent, FulltextContentFactory
48
# TODO: Avoid repeatedly opening weaves so many times.
50
# XXX: This doesn't handle ghost (not present in branch) revisions at
51
# all yet. I'm not sure they really should be supported.
53
# NOTE: This doesn't copy revisions which may be present but not
54
# merged into the last revision. I'm not sure we want to do that.
56
# - get a list of revisions that need to be pulled in
57
# - for each one, pull in that revision file
58
# and get the inventory, and store the inventory with right
60
# - and get the ancestry, and store that with right parents too
61
# - and keep a note of all file ids and version seen
62
# - then go through all files; for each one get the weave,
63
# and add in all file versions
47
66
class RepoFetcher(object):
48
67
"""Pull revisions and texts from one repository to another.
70
if set, try to limit to the data this revision references.
73
count_copied -- number of revisions copied
50
75
This should not be used directly, it's essential a object to encapsulate
51
76
the logic in InterRepository.fetch().
54
def __init__(self, to_repository, from_repository, last_revision=None,
55
pb=None, find_ghosts=True, fetch_spec=None):
79
def __init__(self, to_repository, from_repository, last_revision=None, pb=None,
56
81
"""Create a repo fetcher.
58
:param last_revision: If set, try to limit to the data this revision
60
83
:param find_ghosts: If True search the entire history for ghosts.
61
:param pb: ProgressBar object to use; deprecated and ignored.
62
This method will just create one on top of the stack.
65
symbol_versioning.warn(
66
symbol_versioning.deprecated_in((1, 14, 0))
67
% "pb parameter to RepoFetcher.__init__")
68
# and for simplicity it is in fact ignored
69
# repository.fetch has the responsibility for short-circuiting
70
# attempts to copy between a repository and itself.
86
self.failed_revisions = []
88
if to_repository.has_same_location(from_repository):
89
# repository.fetch should be taking care of this case.
90
raise errors.BzrError('RepoFetcher run '
91
'between two objects at the same location: '
92
'%r and %r' % (to_repository, from_repository))
71
93
self.to_repository = to_repository
72
94
self.from_repository = from_repository
73
self.sink = to_repository._get_sink()
74
95
# must not mutate self._last_revision as its potentially a shared instance
75
96
self._last_revision = last_revision
76
self._fetch_spec = fetch_spec
77
97
self.find_ghosts = find_ghosts
99
self.pb = bzrlib.ui.ui_factory.nested_progress_bar()
100
self.nested_pb = self.pb
103
self.nested_pb = None
78
104
self.from_repository.lock_read()
79
mutter("Using fetch logic to copy between %s(%s) and %s(%s)",
80
self.from_repository, self.from_repository._format,
81
self.to_repository, self.to_repository._format)
106
self.to_repository.lock_write()
108
self.to_repository.start_write_group()
112
self.to_repository.abort_write_group()
115
self.to_repository.commit_write_group()
118
if self.nested_pb is not None:
119
self.nested_pb.finished()
121
self.to_repository.unlock()
85
123
self.from_repository.unlock()
87
125
def __fetch(self):
88
126
"""Primary worker function.
90
This initialises all the needed variables, and then fetches the
128
This initialises all the needed variables, and then fetches the
91
129
requested revisions, finally clearing the progress bar.
93
# Roughly this is what we're aiming for fetch to become:
95
# missing = self.sink.insert_stream(self.source.get_stream(search))
97
# missing = self.sink.insert_stream(self.source.get_items(missing))
99
131
self.count_total = 0
100
132
self.file_ids_names = {}
101
pb = ui.ui_factory.nested_progress_bar()
102
pb.show_pct = pb.show_count = False
133
pp = ProgressPhase('Transferring', 4, self.pb)
104
pb.update("Finding revisions", 0, 2)
105
136
search = self._revids_to_fetch()
106
137
if search is None:
108
pb.update("Fetching revisions", 1, 2)
109
self._fetch_everything_for_search(search)
139
if getattr(self, '_fetch_everything_for_search', None) is not None:
140
self._fetch_everything_for_search(search, pp)
142
# backward compatibility
143
self._fetch_everything_for_revisions(search.get_keys, pp)
113
def _fetch_everything_for_search(self, search):
147
def _fetch_everything_for_search(self, search, pp):
114
148
"""Fetch all data for the given set of revisions."""
115
149
# The first phase is "file". We pass the progress bar for it directly
116
150
# into item_keys_introduced_by, which has more information about how
120
154
# item_keys_introduced_by should have a richer API than it does at the
121
155
# moment, so that it can feed the progress information back to this
123
if (self.from_repository._format.rich_root_data and
124
not self.to_repository._format.rich_root_data):
125
raise errors.IncompatibleRepositories(
126
self.from_repository, self.to_repository,
127
"different rich-root support")
128
pb = ui.ui_factory.nested_progress_bar()
158
pb = bzrlib.ui.ui_factory.nested_progress_bar()
130
pb.update("Get stream source")
131
source = self.from_repository._get_source(
132
self.to_repository._format)
133
stream = source.get_stream(search)
134
from_format = self.from_repository._format
135
pb.update("Inserting stream")
136
resume_tokens, missing_keys = self.sink.insert_stream(
137
stream, from_format, [])
138
if self.to_repository._fallback_repositories:
140
self._parent_inventories(search.get_keys()))
142
pb.update("Missing keys")
143
stream = source.get_stream_for_missing_keys(missing_keys)
144
pb.update("Inserting missing keys")
145
resume_tokens, missing_keys = self.sink.insert_stream(
146
stream, from_format, resume_tokens)
148
raise AssertionError(
149
"second push failed to complete a fetch %r." % (
152
raise AssertionError(
153
"second push failed to commit the fetch %r." % (
155
pb.update("Finishing stream")
160
revs = search.get_keys()
161
graph = self.from_repository.get_graph()
162
revs = list(graph.iter_topo_order(revs))
163
data_to_fetch = self.from_repository.item_keys_introduced_by(revs,
166
for knit_kind, file_id, revisions in data_to_fetch:
167
if knit_kind != phase:
169
# Make a new progress bar for this phase
172
pb = bzrlib.ui.ui_factory.nested_progress_bar()
173
if knit_kind == "file":
174
# Accumulate file texts
175
text_keys.extend([(file_id, revision) for revision in
177
elif knit_kind == "inventory":
178
# Now copy the file texts.
179
to_texts = self.to_repository.texts
180
from_texts = self.from_repository.texts
181
to_texts.insert_record_stream(from_texts.get_record_stream(
182
text_keys, self.to_repository._fetch_order,
183
not self.to_repository._fetch_uses_deltas))
184
# Cause an error if a text occurs after we have done the
187
# Before we process the inventory we generate the root
188
# texts (if necessary) so that the inventories references
190
self._generate_root_texts(revs)
191
# NB: This currently reopens the inventory weave in source;
192
# using a single stream interface instead would avoid this.
193
self._fetch_inventory_weave(revs, pb)
194
elif knit_kind == "signatures":
195
# Nothing to do here; this will be taken care of when
196
# _fetch_revision_texts happens.
198
elif knit_kind == "revisions":
199
self._fetch_revision_texts(revs, pb)
201
raise AssertionError("Unknown knit kind %r" % knit_kind)
202
if self.to_repository._fetch_reconcile:
203
self.to_repository.reconcile()
207
self.count_copied += len(revs)
160
209
def _revids_to_fetch(self):
161
210
"""Determines the exact revisions needed from self.from_repository to
162
211
install self._last_revision in self.to_repository.
164
213
If no revisions need to be fetched, then this just returns None.
166
if self._fetch_spec is not None:
167
return self._fetch_spec
168
215
mutter('fetch up to rev {%s}', self._last_revision)
169
216
if self._last_revision is NULL_REVISION:
170
217
# explicit limit of no revisions needed
172
return self.to_repository.search_missing_revision_ids(
173
self.from_repository, self._last_revision,
174
find_ghosts=self.find_ghosts)
176
def _parent_inventories(self, revision_ids):
177
# Find all the parent revisions referenced by the stream, but
178
# not present in the stream, and make sure we send their
180
parent_maps = self.to_repository.get_parent_map(revision_ids)
182
map(parents.update, parent_maps.itervalues())
183
parents.discard(NULL_REVISION)
184
parents.difference_update(revision_ids)
185
missing_keys = set(('inventories', rev_id) for rev_id in parents)
219
if (self._last_revision is not None and
220
self.to_repository.has_revision(self._last_revision)):
223
return self.to_repository.search_missing_revision_ids(
224
self.from_repository, self._last_revision,
225
find_ghosts=self.find_ghosts)
226
except errors.NoSuchRevision, e:
227
raise InstallFailed([self._last_revision])
229
def _fetch_inventory_weave(self, revs, pb):
230
pb.update("fetch inventory", 0, 2)
231
to_weave = self.to_repository.inventories
232
child_pb = bzrlib.ui.ui_factory.nested_progress_bar()
234
# just merge, this is optimisable and its means we don't
235
# copy unreferenced data such as not-needed inventories.
236
pb.update("fetch inventory", 1, 3)
237
from_weave = self.from_repository.inventories
238
pb.update("fetch inventory", 2, 3)
239
# we fetch only the referenced inventories because we do not
240
# know for unselected inventories whether all their required
241
# texts are present in the other repository - it could be
243
to_weave.insert_record_stream(from_weave.get_record_stream(
244
[(rev_id,) for rev_id in revs],
245
self.to_repository._fetch_order,
246
not self.to_repository._fetch_uses_deltas))
250
def _fetch_revision_texts(self, revs, pb):
251
# may need to be a InterRevisionStore call here.
252
to_sf = self.to_repository.signatures
253
from_sf = self.from_repository.signatures
254
# A missing signature is just skipped.
255
to_sf.insert_record_stream(filter_absent(from_sf.get_record_stream(
256
[(rev_id,) for rev_id in revs],
257
self.to_repository._fetch_order,
259
# Bug #261339, some knit repositories accidentally had deltas in their
260
# revision stream, when you weren't ever supposed to have deltas.
261
# So we now *force* fulltext copying for signatures and revisions
262
self._fetch_just_revision_texts(revs)
264
def _fetch_just_revision_texts(self, version_ids):
265
to_rf = self.to_repository.revisions
266
from_rf = self.from_repository.revisions
267
to_rf.insert_record_stream(from_rf.get_record_stream(
268
[(rev_id,) for rev_id in version_ids],
269
self.to_repository._fetch_order,
271
# Bug #261339, some knit repositories accidentally had deltas in their
272
# revision stream, when you weren't ever supposed to have deltas.
273
# So we now *force* fulltext copying for signatures and revisions
275
def _generate_root_texts(self, revs):
276
"""This will be called by __fetch between fetching weave texts and
277
fetching the inventory weave.
279
Subclasses should override this if they need to generate root texts
280
after fetching weave texts.
189
285
class Inter1and2Helper(object):
190
286
"""Helper for operations that convert data from model 1 and 2
192
288
This is for use by fetchers and converters.
195
def __init__(self, source):
291
def __init__(self, source, target):
198
294
:param source: The repository data comes from
295
:param target: The repository data goes to
200
297
self.source = source
202
300
def iter_rev_trees(self, revs):
203
301
"""Iterate through RevisionTrees efficiently.
253
355
# yet, and are unlikely to in non-rich-root environments anyway.
254
356
root_id_order.sort(key=operator.itemgetter(0))
255
357
# Create a record stream containing the roots to create.
257
# XXX: not covered by tests, should have a flag to always run
258
# this. -- mbp 20100129
259
graph = _get_rich_root_heads_graph(self.source, revs)
260
new_roots_stream = _new_root_data_stream(
261
root_id_order, rev_id_to_root_id, parent_map, self.source, graph)
262
return [('texts', new_roots_stream)]
265
def _get_rich_root_heads_graph(source_repo, revision_ids):
266
"""Get a Graph object suitable for asking heads() for new rich roots."""
267
st = static_tuple.StaticTuple
268
revision_keys = [st(r_id).intern() for r_id in revision_ids]
269
known_graph = source_repo.revisions.get_known_graph_ancestry(
271
return _mod_graph.GraphThunkIdsToKeys(known_graph)
274
def _new_root_data_stream(
275
root_keys_to_create, rev_id_to_root_id_map, parent_map, repo, graph=None):
276
"""Generate a texts substream of synthesised root entries.
278
Used in fetches that do rich-root upgrades.
280
:param root_keys_to_create: iterable of (root_id, rev_id) pairs describing
281
the root entries to create.
282
:param rev_id_to_root_id_map: dict of known rev_id -> root_id mappings for
283
calculating the parents. If a parent rev_id is not found here then it
284
will be recalculated.
285
:param parent_map: a parent map for all the revisions in
287
:param graph: a graph to use instead of repo.get_graph().
289
for root_key in root_keys_to_create:
290
root_id, rev_id = root_key
291
parent_keys = _parent_keys_for_root_version(
292
root_id, rev_id, rev_id_to_root_id_map, parent_map, repo, graph)
293
yield versionedfile.FulltextContentFactory(
294
root_key, parent_keys, None, '')
297
def _parent_keys_for_root_version(
298
root_id, rev_id, rev_id_to_root_id_map, parent_map, repo, graph=None):
299
"""Get the parent keys for a given root id.
301
A helper function for _new_root_data_stream.
303
# Include direct parents of the revision, but only if they used the same
304
# root_id and are heads.
305
rev_parents = parent_map[rev_id]
307
for parent_id in rev_parents:
308
if parent_id == NULL_REVISION:
310
if parent_id not in rev_id_to_root_id_map:
311
# We probably didn't read this revision, go spend the extra effort
314
tree = repo.revision_tree(parent_id)
315
except errors.NoSuchRevision:
316
# Ghost, fill out rev_id_to_root_id in case we encounter this
318
# But set parent_root_id to None since we don't really know
319
parent_root_id = None
321
parent_root_id = tree.get_root_id()
322
rev_id_to_root_id_map[parent_id] = None
324
# rev_id_to_root_id_map[parent_id] = parent_root_id
325
# memory consumption maybe?
327
parent_root_id = rev_id_to_root_id_map[parent_id]
328
if root_id == parent_root_id:
329
# With stacking we _might_ want to refer to a non-local revision,
330
# but this code path only applies when we have the full content
331
# available, so ghosts really are ghosts, not just the edge of
333
parent_ids.append(parent_id)
335
# root_id may be in the parent anyway.
337
tree = repo.revision_tree(parent_id)
338
except errors.NoSuchRevision:
339
# ghost, can't refer to it.
359
for key in root_id_order:
360
root_id, rev_id = key
361
rev_parents = parent_map[rev_id]
362
# We drop revision parents with different file-ids, because
363
# that represents a rename of the root to a different location
364
# - its not actually a parent for us. (We could look for that
365
# file id in the revision tree at considerably more expense,
366
# but for now this is sufficient (and reconcile will catch and
367
# correct this anyway).
368
# When a parent revision is a ghost, we guess that its root id
369
# was unchanged (rather than trimming it from the parent list).
370
parent_keys = tuple((root_id, parent) for parent in rev_parents
371
if parent != NULL_REVISION and
372
rev_id_to_root_id.get(parent, root_id) == root_id)
373
yield FulltextContentFactory(key, parent_keys, None, '')
374
to_texts.insert_record_stream(yield_roots())
376
def regenerate_inventory(self, revs):
377
"""Generate a new inventory versionedfile in target, convertin data.
379
The inventory is retrieved from the source, (deserializing it), and
380
stored in the target (reserializing it in a different format).
381
:param revs: The revisions to include
383
for tree in self.iter_rev_trees(revs):
384
parents = tree.get_parent_ids()
385
self.target.add_inventory(tree.get_revision_id(), tree.inventory,
388
def fetch_revisions(self, revision_ids):
389
# TODO: should this batch them up rather than requesting 10,000
391
for revision in self.source.get_revisions(revision_ids):
392
self.target.add_revision(revision.revision_id, revision)
395
class Model1toKnit2Fetcher(RepoFetcher):
396
"""Fetch from a Model1 repository into a Knit2 repository
398
def __init__(self, to_repository, from_repository, last_revision=None,
399
pb=None, find_ghosts=True):
400
self.helper = Inter1and2Helper(from_repository, to_repository)
401
RepoFetcher.__init__(self, to_repository, from_repository,
402
last_revision, pb, find_ghosts)
404
def _generate_root_texts(self, revs):
405
self.helper.generate_root_texts(revs)
407
def _fetch_inventory_weave(self, revs, pb):
408
self.helper.regenerate_inventory(revs)
410
def _fetch_revision_texts(self, revs, pb):
411
"""Fetch revision object texts"""
415
pb.update('copying revisions', count, total)
417
sig_text = self.from_repository.get_signature_text(rev)
418
self.to_repository.add_signature_text(rev, sig_text)
419
except errors.NoSuchRevision:
343
parent_ids.append(tree.inventory[root_id].revision)
344
except errors.NoSuchId:
347
# Drop non-head parents
349
graph = repo.get_graph()
350
heads = graph.heads(parent_ids)
352
for parent_id in parent_ids:
353
if parent_id in heads and parent_id not in selected_ids:
354
selected_ids.append(parent_id)
355
parent_keys = [(root_id, parent_id) for parent_id in selected_ids]
422
self._copy_revision(rev)
425
def _copy_revision(self, rev):
426
self.helper.fetch_revisions([rev])
429
class Knit1to2Fetcher(RepoFetcher):
430
"""Fetch from a Knit1 repository into a Knit2 repository"""
432
def __init__(self, to_repository, from_repository, last_revision=None,
433
pb=None, find_ghosts=True):
434
self.helper = Inter1and2Helper(from_repository, to_repository)
435
RepoFetcher.__init__(self, to_repository, from_repository,
436
last_revision, pb, find_ghosts)
438
def _generate_root_texts(self, revs):
439
self.helper.generate_root_texts(revs)
441
def _fetch_inventory_weave(self, revs, pb):
442
self.helper.regenerate_inventory(revs)
444
def _fetch_just_revision_texts(self, version_ids):
445
self.helper.fetch_revisions(version_ids)
added
removed
bzrlib/fetch.py
