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(), """
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
43
from bzrlib.revision import NULL_REVISION
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
66
47
class RepoFetcher(object):
67
48
"""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
75
50
This should not be used directly, it's essential a object to encapsulate
76
51
the logic in InterRepository.fetch().
79
def __init__(self, to_repository, from_repository, last_revision=None, pb=None,
54
def __init__(self, to_repository, from_repository, last_revision=None,
55
pb=None, find_ghosts=True, fetch_spec=None):
81
56
"""Create a repo fetcher.
58
:param last_revision: If set, try to limit to the data this revision
83
60
:param find_ghosts: If True search the entire history for ghosts.
84
:param _write_group_acquired_callable: Don't use; this parameter only
85
exists to facilitate a hack done in InterPackRepo.fetch. We would
86
like to remove this parameter.
61
:param pb: ProgressBar object to use; deprecated and ignored.
62
This method will just create one on top of the stack.
89
self.failed_revisions = []
91
if to_repository.has_same_location(from_repository):
92
# repository.fetch should be taking care of this case.
93
raise errors.BzrError('RepoFetcher run '
94
'between two objects at the same location: '
95
'%r and %r' % (to_repository, from_repository))
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.
96
71
self.to_repository = to_repository
97
72
self.from_repository = from_repository
73
self.sink = to_repository._get_sink()
98
74
# must not mutate self._last_revision as its potentially a shared instance
99
75
self._last_revision = last_revision
76
self._fetch_spec = fetch_spec
100
77
self.find_ghosts = find_ghosts
102
self.pb = bzrlib.ui.ui_factory.nested_progress_bar()
103
self.nested_pb = self.pb
106
self.nested_pb = None
107
78
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)
109
self.to_repository.lock_write()
111
self.to_repository.start_write_group()
115
self.to_repository.abort_write_group(suppress_errors=True)
118
self.to_repository.commit_write_group()
121
if self.nested_pb is not None:
122
self.nested_pb.finished()
124
self.to_repository.unlock()
126
85
self.from_repository.unlock()
128
87
def __fetch(self):
129
88
"""Primary worker function.
131
This initialises all the needed variables, and then fetches the
90
This initialises all the needed variables, and then fetches the
132
91
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))
134
99
self.count_total = 0
135
100
self.file_ids_names = {}
136
pp = ProgressPhase('Transferring', 4, self.pb)
101
pb = ui.ui_factory.nested_progress_bar()
102
pb.show_pct = pb.show_count = False
104
pb.update("Finding revisions", 0, 2)
139
105
search = self._revids_to_fetch()
140
106
if search is None:
142
if getattr(self, '_fetch_everything_for_search', None) is not None:
143
self._fetch_everything_for_search(search, pp)
145
# backward compatibility
146
self._fetch_everything_for_revisions(search.get_keys, pp)
108
pb.update("Fetching revisions", 1, 2)
109
self._fetch_everything_for_search(search)
150
def _fetch_everything_for_search(self, search, pp):
113
def _fetch_everything_for_search(self, search):
151
114
"""Fetch all data for the given set of revisions."""
152
115
# The first phase is "file". We pass the progress bar for it directly
153
116
# into item_keys_introduced_by, which has more information about how
157
120
# item_keys_introduced_by should have a richer API than it does at the
158
121
# moment, so that it can feed the progress information back to this
161
pb = bzrlib.ui.ui_factory.nested_progress_bar()
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()
163
revs = search.get_keys()
164
graph = self.from_repository.get_graph()
165
revs = list(graph.iter_topo_order(revs))
166
data_to_fetch = self.from_repository.item_keys_introduced_by(revs,
169
for knit_kind, file_id, revisions in data_to_fetch:
170
if knit_kind != phase:
172
# Make a new progress bar for this phase
175
pb = bzrlib.ui.ui_factory.nested_progress_bar()
176
if knit_kind == "file":
177
# Accumulate file texts
178
text_keys.extend([(file_id, revision) for revision in
180
elif knit_kind == "inventory":
181
# Now copy the file texts.
182
to_texts = self.to_repository.texts
183
from_texts = self.from_repository.texts
184
to_texts.insert_record_stream(from_texts.get_record_stream(
185
text_keys, self.to_repository._fetch_order,
186
not self.to_repository._fetch_uses_deltas))
187
# Cause an error if a text occurs after we have done the
190
# Before we process the inventory we generate the root
191
# texts (if necessary) so that the inventories references
193
self._generate_root_texts(revs)
194
# NB: This currently reopens the inventory weave in source;
195
# using a single stream interface instead would avoid this.
196
self._fetch_inventory_weave(revs, pb)
197
elif knit_kind == "signatures":
198
# Nothing to do here; this will be taken care of when
199
# _fetch_revision_texts happens.
201
elif knit_kind == "revisions":
202
self._fetch_revision_texts(revs, pb)
204
raise AssertionError("Unknown knit kind %r" % knit_kind)
205
if self.to_repository._fetch_reconcile:
206
self.to_repository.reconcile()
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")
210
self.count_copied += len(revs)
212
160
def _revids_to_fetch(self):
213
161
"""Determines the exact revisions needed from self.from_repository to
214
162
install self._last_revision in self.to_repository.
216
164
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
218
168
mutter('fetch up to rev {%s}', self._last_revision)
219
169
if self._last_revision is NULL_REVISION:
220
170
# explicit limit of no revisions needed
222
if (self._last_revision is not None and
223
self.to_repository.has_revision(self._last_revision)):
226
return self.to_repository.search_missing_revision_ids(
227
self.from_repository, self._last_revision,
228
find_ghosts=self.find_ghosts)
229
except errors.NoSuchRevision, e:
230
raise InstallFailed([self._last_revision])
232
def _fetch_inventory_weave(self, revs, pb):
233
pb.update("fetch inventory", 0, 2)
234
to_weave = self.to_repository.inventories
235
# just merge, this is optimisable and its means we don't
236
# copy unreferenced data such as not-needed inventories.
237
pb.update("fetch inventory", 1, 3)
238
from_weave = self.from_repository.inventories
239
pb.update("fetch inventory", 2, 3)
240
# we fetch only the referenced inventories because we do not
241
# know for unselected inventories whether all their required
242
# texts are present in the other repository - it could be
244
to_weave.insert_record_stream(from_weave.get_record_stream(
245
[(rev_id,) for rev_id in revs],
246
self.to_repository._fetch_order,
247
not self.to_repository._fetch_uses_deltas))
249
def _fetch_revision_texts(self, revs, pb):
250
# fetch signatures first and then the revision texts
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,
258
not self.to_repository._fetch_uses_deltas)))
259
self._fetch_just_revision_texts(revs)
261
def _fetch_just_revision_texts(self, version_ids):
262
to_rf = self.to_repository.revisions
263
from_rf = self.from_repository.revisions
264
# If a revision has a delta, this is actually expanded inside the
265
# insert_record_stream code now, which is an alternate fix for
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,
270
not self.to_repository._fetch_uses_deltas))
272
def _generate_root_texts(self, revs):
273
"""This will be called by __fetch between fetching weave texts and
274
fetching the inventory weave.
276
Subclasses should override this if they need to generate root texts
277
after fetching weave texts.
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)
282
189
class Inter1and2Helper(object):
283
190
"""Helper for operations that convert data from model 1 and 2
285
192
This is for use by fetchers and converters.
288
def __init__(self, source, target):
195
def __init__(self, source):
291
198
:param source: The repository data comes from
292
:param target: The repository data goes to
294
200
self.source = source
297
202
def iter_rev_trees(self, revs):
298
203
"""Iterate through RevisionTrees efficiently.
352
253
# yet, and are unlikely to in non-rich-root environments anyway.
353
254
root_id_order.sort(key=operator.itemgetter(0))
354
255
# Create a record stream containing the roots to create.
356
for key in root_id_order:
357
root_id, rev_id = key
358
rev_parents = parent_map[rev_id]
359
# We drop revision parents with different file-ids, because
360
# that represents a rename of the root to a different location
361
# - its not actually a parent for us. (We could look for that
362
# file id in the revision tree at considerably more expense,
363
# but for now this is sufficient (and reconcile will catch and
364
# correct this anyway).
365
# When a parent revision is a ghost, we guess that its root id
366
# was unchanged (rather than trimming it from the parent list).
367
parent_keys = tuple((root_id, parent) for parent in rev_parents
368
if parent != NULL_REVISION and
369
rev_id_to_root_id.get(parent, root_id) == root_id)
370
yield FulltextContentFactory(key, parent_keys, None, '')
371
to_texts.insert_record_stream(yield_roots())
373
def regenerate_inventory(self, revs):
374
"""Generate a new inventory versionedfile in target, convertin data.
376
The inventory is retrieved from the source, (deserializing it), and
377
stored in the target (reserializing it in a different format).
378
:param revs: The revisions to include
380
for tree in self.iter_rev_trees(revs):
381
parents = tree.get_parent_ids()
382
self.target.add_inventory(tree.get_revision_id(), tree.inventory,
385
def fetch_revisions(self, revision_ids):
386
# TODO: should this batch them up rather than requesting 10,000
388
for revision in self.source.get_revisions(revision_ids):
389
self.target.add_revision(revision.revision_id, revision)
392
class Model1toKnit2Fetcher(RepoFetcher):
393
"""Fetch from a Model1 repository into a Knit2 repository
395
def __init__(self, to_repository, from_repository, last_revision=None,
396
pb=None, find_ghosts=True):
397
self.helper = Inter1and2Helper(from_repository, to_repository)
398
RepoFetcher.__init__(self, to_repository, from_repository,
399
last_revision, pb, find_ghosts)
401
def _generate_root_texts(self, revs):
402
self.helper.generate_root_texts(revs)
404
def _fetch_inventory_weave(self, revs, pb):
405
self.helper.regenerate_inventory(revs)
407
def _fetch_revision_texts(self, revs, pb):
408
"""Fetch revision object texts"""
412
pb.update('copying revisions', count, total)
414
sig_text = self.from_repository.get_signature_text(rev)
415
self.to_repository.add_signature_text(rev, sig_text)
416
except errors.NoSuchRevision:
257
graph = _get_rich_root_heads_graph(self.source_repo, revs)
258
new_roots_stream = _new_root_data_stream(
259
root_id_order, rev_id_to_root_id, parent_map, self.source, graph)
260
return [('texts', new_roots_stream)]
263
def _get_rich_root_heads_graph(source_repo, revision_ids):
264
"""Get a Graph object suitable for asking heads() for new rich roots."""
265
st = static_tuple.StaticTuple
266
revision_keys = [st(r_id).intern() for r_id in revision_ids]
267
known_graph = source_repo.revisions.get_known_graph_ancestry(
269
return _mod_graph.GraphThunkIdsToKeys(known_graph)
272
def _new_root_data_stream(
273
root_keys_to_create, rev_id_to_root_id_map, parent_map, repo, graph=None):
274
"""Generate a texts substream of synthesised root entries.
276
Used in fetches that do rich-root upgrades.
278
:param root_keys_to_create: iterable of (root_id, rev_id) pairs describing
279
the root entries to create.
280
:param rev_id_to_root_id_map: dict of known rev_id -> root_id mappings for
281
calculating the parents. If a parent rev_id is not found here then it
282
will be recalculated.
283
:param parent_map: a parent map for all the revisions in
285
:param graph: a graph to use instead of repo.get_graph().
287
for root_key in root_keys_to_create:
288
root_id, rev_id = root_key
289
parent_keys = _parent_keys_for_root_version(
290
root_id, rev_id, rev_id_to_root_id_map, parent_map, repo, graph)
291
yield versionedfile.FulltextContentFactory(
292
root_key, parent_keys, None, '')
295
def _parent_keys_for_root_version(
296
root_id, rev_id, rev_id_to_root_id_map, parent_map, repo, graph=None):
297
"""Get the parent keys for a given root id.
299
A helper function for _new_root_data_stream.
301
# Include direct parents of the revision, but only if they used the same
302
# root_id and are heads.
303
rev_parents = parent_map[rev_id]
305
for parent_id in rev_parents:
306
if parent_id == NULL_REVISION:
308
if parent_id not in rev_id_to_root_id_map:
309
# We probably didn't read this revision, go spend the extra effort
312
tree = repo.revision_tree(parent_id)
313
except errors.NoSuchRevision:
314
# Ghost, fill out rev_id_to_root_id in case we encounter this
316
# But set parent_root_id to None since we don't really know
317
parent_root_id = None
319
parent_root_id = tree.get_root_id()
320
rev_id_to_root_id_map[parent_id] = None
322
# rev_id_to_root_id_map[parent_id] = parent_root_id
323
# memory consumption maybe?
325
parent_root_id = rev_id_to_root_id_map[parent_id]
326
if root_id == parent_root_id:
327
# With stacking we _might_ want to refer to a non-local revision,
328
# but this code path only applies when we have the full content
329
# available, so ghosts really are ghosts, not just the edge of
331
parent_ids.append(parent_id)
333
# root_id may be in the parent anyway.
335
tree = repo.revision_tree(parent_id)
336
except errors.NoSuchRevision:
337
# ghost, can't refer to it.
419
self._copy_revision(rev)
422
def _copy_revision(self, rev):
423
self.helper.fetch_revisions([rev])
426
class Knit1to2Fetcher(RepoFetcher):
427
"""Fetch from a Knit1 repository into a Knit2 repository"""
429
def __init__(self, to_repository, from_repository, last_revision=None,
430
pb=None, find_ghosts=True):
431
self.helper = Inter1and2Helper(from_repository, to_repository)
432
RepoFetcher.__init__(self, to_repository, from_repository,
433
last_revision, pb, find_ghosts)
435
def _generate_root_texts(self, revs):
436
self.helper.generate_root_texts(revs)
438
def _fetch_inventory_weave(self, revs, pb):
439
self.helper.regenerate_inventory(revs)
441
def _fetch_just_revision_texts(self, version_ids):
442
self.helper.fetch_revisions(version_ids)
341
parent_ids.append(tree.inventory[root_id].revision)
342
except errors.NoSuchId:
345
# Drop non-head parents
347
graph = repo.get_graph()
348
heads = graph.heads(parent_ids)
350
for parent_id in parent_ids:
351
if parent_id in heads and parent_id not in selected_ids:
352
selected_ids.append(parent_id)
353
parent_keys = [(root_id, parent_id) for parent_id in selected_ids]
added
removed
bzrlib/fetch.py
