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.
36
import bzrlib.errors as errors
37
33
from bzrlib.errors import InstallFailed
38
34
from bzrlib.progress import ProgressPhase
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from bzrlib.revision import is_null, NULL_REVISION
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from bzrlib.symbol_versioning import (deprecated_function,
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from bzrlib.revision import NULL_REVISION
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36
from bzrlib.tsort import topo_sort
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37
from bzrlib.trace import mutter
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from bzrlib.versionedfile import filter_absent, FulltextContentFactory
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# TODO: Avoid repeatedly opening weaves so many times.
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# XXX: This doesn't handle ghost (not present in branch) revisions at
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# all yet. I'm not sure they really should be supported.
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# NOTE: This doesn't copy revisions which may be present but not
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# merged into the last revision. I'm not sure we want to do that.
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# - get a list of revisions that need to be pulled in
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# - for each one, pull in that revision file
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# and get the inventory, and store the inventory with right
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# - and get the ancestry, and store that with right parents too
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# - and keep a note of all file ids and version seen
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# - then go through all files; for each one get the weave,
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# and add in all file versions
39
from bzrlib.versionedfile import FulltextContentFactory
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42
class RepoFetcher(object):
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43
"""Pull revisions and texts from one repository to another.
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if set, try to limit to the data this revision references.
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count_copied -- number of revisions copied
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45
This should not be used directly, it's essential a object to encapsulate
76
46
the logic in InterRepository.fetch().
79
def __init__(self, to_repository, from_repository, last_revision=None, pb=None,
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def __init__(self, to_repository, from_repository, last_revision=None,
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pb=None, find_ghosts=True, fetch_spec=None):
81
51
"""Create a repo fetcher.
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:param last_revision: If set, try to limit to the data this revision
83
55
:param find_ghosts: If True search the entire history for ghosts.
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56
:param _write_group_acquired_callable: Don't use; this parameter only
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57
exists to facilitate a hack done in InterPackRepo.fetch. We would
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58
like to remove this parameter.
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:param pb: ProgressBar object to use; deprecated and ignored.
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This method will just create one on top of the stack.
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self.failed_revisions = []
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symbol_versioning.warn(
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symbol_versioning.deprecated_in((1, 14, 0))
65
% "pb parameter to RepoFetcher.__init__")
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# and for simplicity it is in fact ignored
91
67
if to_repository.has_same_location(from_repository):
92
68
# repository.fetch should be taking care of this case.
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raise errors.BzrError('RepoFetcher run '
95
71
'%r and %r' % (to_repository, from_repository))
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self.to_repository = to_repository
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self.from_repository = from_repository
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self.sink = to_repository._get_sink()
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# must not mutate self._last_revision as its potentially a shared instance
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self._last_revision = last_revision
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self._fetch_spec = fetch_spec
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self.find_ghosts = find_ghosts
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self.pb = bzrlib.ui.ui_factory.nested_progress_bar()
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self.nested_pb = self.pb
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self.nested_pb = None
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self.from_repository.lock_read()
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mutter("Using fetch logic to copy between %s(%s) and %s(%s)",
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self.from_repository, self.from_repository._format,
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self.to_repository, self.to_repository._format)
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self.to_repository.lock_write()
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self.to_repository.start_write_group()
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self.to_repository.abort_write_group(suppress_errors=True)
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self.to_repository.commit_write_group()
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if self.nested_pb is not None:
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self.nested_pb.finished()
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self.to_repository.unlock()
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self.from_repository.unlock()
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def __fetch(self):
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89
"""Primary worker function.
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This initialises all the needed variables, and then fetches the
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This initialises all the needed variables, and then fetches the
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92
requested revisions, finally clearing the progress bar.
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# Roughly this is what we're aiming for fetch to become:
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# missing = self.sink.insert_stream(self.source.get_stream(search))
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# missing = self.sink.insert_stream(self.source.get_items(missing))
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100
self.count_total = 0
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self.file_ids_names = {}
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pp = ProgressPhase('Transferring', 4, self.pb)
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pb = bzrlib.ui.ui_factory.nested_progress_bar()
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pb.show_pct = pb.show_count = False
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pb.update("Finding revisions", 0, 2)
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106
search = self._revids_to_fetch()
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107
if search is None:
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if getattr(self, '_fetch_everything_for_search', None) is not None:
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self._fetch_everything_for_search(search, pp)
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# backward compatibility
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self._fetch_everything_for_revisions(search.get_keys, pp)
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pb.update("Fetching revisions", 1, 2)
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self._fetch_everything_for_search(search)
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def _fetch_everything_for_search(self, search, pp):
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def _fetch_everything_for_search(self, search):
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"""Fetch all data for the given set of revisions."""
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# The first phase is "file". We pass the progress bar for it directly
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# into item_keys_introduced_by, which has more information about how
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# item_keys_introduced_by should have a richer API than it does at the
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122
# moment, so that it can feed the progress information back to this
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if (self.from_repository._format.rich_root_data and
125
not self.to_repository._format.rich_root_data):
126
raise errors.IncompatibleRepositories(
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self.from_repository, self.to_repository,
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"different rich-root support")
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129
pb = bzrlib.ui.ui_factory.nested_progress_bar()
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revs = search.get_keys()
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graph = self.from_repository.get_graph()
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revs = list(graph.iter_topo_order(revs))
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data_to_fetch = self.from_repository.item_keys_introduced_by(revs,
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for knit_kind, file_id, revisions in data_to_fetch:
170
if knit_kind != phase:
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# Make a new progress bar for this phase
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pb = bzrlib.ui.ui_factory.nested_progress_bar()
176
if knit_kind == "file":
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# Accumulate file texts
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text_keys.extend([(file_id, revision) for revision in
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elif knit_kind == "inventory":
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# Now copy the file texts.
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to_texts = self.to_repository.texts
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from_texts = self.from_repository.texts
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to_texts.insert_record_stream(from_texts.get_record_stream(
185
text_keys, self.to_repository._fetch_order,
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not self.to_repository._fetch_uses_deltas))
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# Cause an error if a text occurs after we have done the
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# Before we process the inventory we generate the root
191
# texts (if necessary) so that the inventories references
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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
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# _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()
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pb.update("Get stream source")
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source = self.from_repository._get_source(
133
self.to_repository._format)
134
stream = source.get_stream(search)
135
from_format = self.from_repository._format
136
pb.update("Inserting stream")
137
resume_tokens, missing_keys = self.sink.insert_stream(
138
stream, from_format, [])
140
pb.update("Missing keys")
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stream = source.get_stream_for_missing_keys(missing_keys)
142
pb.update("Inserting missing keys")
143
resume_tokens, missing_keys = self.sink.insert_stream(
144
stream, from_format, resume_tokens)
146
raise AssertionError(
147
"second push failed to complete a fetch %r." % (
150
raise AssertionError(
151
"second push failed to commit the fetch %r." % (
153
pb.update("Finishing stream")
210
self.count_copied += len(revs)
212
158
def _revids_to_fetch(self):
213
159
"""Determines the exact revisions needed from self.from_repository to
214
160
install self._last_revision in self.to_repository.
216
162
If no revisions need to be fetched, then this just returns None.
164
if self._fetch_spec is not None:
165
return self._fetch_spec
218
166
mutter('fetch up to rev {%s}', self._last_revision)
219
167
if self._last_revision is NULL_REVISION:
220
168
# explicit limit of no revisions needed
229
177
except errors.NoSuchRevision, e:
230
178
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.
282
181
class Inter1and2Helper(object):
283
182
"""Helper for operations that convert data from model 1 and 2
285
184
This is for use by fetchers and converters.
288
def __init__(self, source, target):
187
def __init__(self, source):
291
190
:param source: The repository data comes from
292
:param target: The repository data goes to
294
192
self.source = source
297
194
def iter_rev_trees(self, revs):
298
195
"""Iterate through RevisionTrees efficiently.
368
264
if parent != NULL_REVISION and
369
265
rev_id_to_root_id.get(parent, root_id) == root_id)
370
266
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:
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)
267
return [('texts', yield_roots())]
added
removed
bzrlib/fetch.py
