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.
33
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,
34
43
from bzrlib.tsort import topo_sort
35
44
from bzrlib.trace import mutter
37
from bzrlib.versionedfile import FulltextContentFactory
46
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
54
# 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
62
# - then go through all files; for each one get the weave,
63
# and add in all file versions
40
66
class RepoFetcher(object):
41
67
"""Pull revisions and texts from one repository to another.
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if set, try to limit to the data this revision references.
73
count_copied -- number of revisions copied
43
75
This should not be used directly, it's essential a object to encapsulate
44
76
the logic in InterRepository.fetch().
47
def __init__(self, to_repository, from_repository, last_revision=None,
48
pb=None, find_ghosts=True, fetch_spec=None):
79
def __init__(self, to_repository, from_repository, last_revision=None, pb=None,
49
81
"""Create a repo fetcher.
51
:param last_revision: If set, try to limit to the data this revision
53
83
:param find_ghosts: If True search the entire history for ghosts.
54
:param pb: ProgressBar object to use; deprecated and ignored.
55
This method will just create one on top of the stack.
58
symbol_versioning.warn(
59
symbol_versioning.deprecated_in((1, 14, 0))
60
% "pb parameter to RepoFetcher.__init__")
61
# and for simplicity it is in fact ignored
62
# repository.fetch has the responsibility for short-circuiting
63
# attempts to copy between a repository and itself.
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self.failed_revisions = []
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if to_repository.has_same_location(from_repository):
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# repository.fetch should be taking care of this case.
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raise errors.BzrError('RepoFetcher run '
91
'between two objects at the same location: '
92
'%r and %r' % (to_repository, from_repository))
64
93
self.to_repository = to_repository
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94
self.from_repository = from_repository
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self.sink = to_repository._get_sink()
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95
# must not mutate self._last_revision as its potentially a shared instance
68
96
self._last_revision = last_revision
69
self._fetch_spec = fetch_spec
70
97
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
71
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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)",
73
self.from_repository, self.from_repository._format,
74
self.to_repository, self.to_repository._format)
106
self.to_repository.lock_write()
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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()
78
123
self.from_repository.unlock()
80
125
def __fetch(self):
81
126
"""Primary worker function.
83
This initialises all the needed variables, and then fetches the
128
This initialises all the needed variables, and then fetches the
84
129
requested revisions, finally clearing the progress bar.
86
# 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))
90
# missing = self.sink.insert_stream(self.source.get_items(missing))
92
131
self.count_total = 0
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132
self.file_ids_names = {}
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pb = bzrlib.ui.ui_factory.nested_progress_bar()
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pb.show_pct = pb.show_count = False
133
pp = ProgressPhase('Transferring', 4, self.pb)
97
pb.update("Finding revisions", 0, 2)
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136
search = self._revids_to_fetch()
99
137
if search is None:
101
pb.update("Fetching revisions", 1, 2)
102
self._fetch_everything_for_search(search)
139
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)
106
def _fetch_everything_for_search(self, search):
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def _fetch_everything_for_search(self, search, pp):
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148
"""Fetch all data for the given set of revisions."""
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149
# The first phase is "file". We pass the progress bar for it directly
109
150
# into item_keys_introduced_by, which has more information about how
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154
# item_keys_introduced_by should have a richer API than it does at the
114
155
# moment, so that it can feed the progress information back to this
116
if (self.from_repository._format.rich_root_data and
117
not self.to_repository._format.rich_root_data):
118
raise errors.IncompatibleRepositories(
119
self.from_repository, self.to_repository,
120
"different rich-root support")
121
158
pb = bzrlib.ui.ui_factory.nested_progress_bar()
123
pb.update("Get stream source")
124
source = self.from_repository._get_source(
125
self.to_repository._format)
126
stream = source.get_stream(search)
127
from_format = self.from_repository._format
128
pb.update("Inserting stream")
129
resume_tokens, missing_keys = self.sink.insert_stream(
130
stream, from_format, [])
131
if self.to_repository._fallback_repositories:
133
self._parent_inventories(search.get_keys()))
135
pb.update("Missing keys")
136
stream = source.get_stream_for_missing_keys(missing_keys)
137
pb.update("Inserting missing keys")
138
resume_tokens, missing_keys = self.sink.insert_stream(
139
stream, from_format, resume_tokens)
141
raise AssertionError(
142
"second push failed to complete a fetch %r." % (
145
raise AssertionError(
146
"second push failed to commit the fetch %r." % (
148
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)
153
209
def _revids_to_fetch(self):
154
210
"""Determines the exact revisions needed from self.from_repository to
155
211
install self._last_revision in self.to_repository.
157
213
If no revisions need to be fetched, then this just returns None.
159
if self._fetch_spec is not None:
160
return self._fetch_spec
161
215
mutter('fetch up to rev {%s}', self._last_revision)
162
216
if self._last_revision is NULL_REVISION:
163
217
# explicit limit of no revisions needed
165
return self.to_repository.search_missing_revision_ids(
166
self.from_repository, self._last_revision,
167
find_ghosts=self.find_ghosts)
169
def _parent_inventories(self, revision_ids):
170
# Find all the parent revisions referenced by the stream, but
171
# not present in the stream, and make sure we send their
173
parent_maps = self.to_repository.get_parent_map(revision_ids)
175
map(parents.update, parent_maps.itervalues())
176
parents.discard(NULL_REVISION)
177
parents.difference_update(revision_ids)
178
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.
182
285
class Inter1and2Helper(object):
183
286
"""Helper for operations that convert data from model 1 and 2
185
288
This is for use by fetchers and converters.
188
def __init__(self, source):
291
def __init__(self, source, target):
191
294
:param source: The repository data comes from
295
:param target: The repository data goes to
193
297
self.source = source
195
300
def iter_rev_trees(self, revs):
196
301
"""Iterate through RevisionTrees efficiently.
265
371
if parent != NULL_REVISION and
266
372
rev_id_to_root_id.get(parent, root_id) == root_id)
267
373
yield FulltextContentFactory(key, parent_keys, None, '')
268
return [('texts', yield_roots())]
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:
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
