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 finally actually join
28
from bzrlib.lazy_import import lazy_import
29
lazy_import(globals(), """
35
import bzrlib.errors as errors
36
from bzrlib.errors import InstallFailed
37
from bzrlib.progress import ProgressPhase
38
from bzrlib.revision import is_null, NULL_REVISION
39
from bzrlib.symbol_versioning import (deprecated_function,
40
from bzrlib.revision import NULL_REVISION
42
41
from bzrlib.trace import mutter
45
from bzrlib.lazy_import import lazy_import
47
# TODO: Avoid repeatedly opening weaves so many times.
49
# XXX: This doesn't handle ghost (not present in branch) revisions at
50
# all yet. I'm not sure they really should be supported.
52
# NOTE: This doesn't copy revisions which may be present but not
53
# merged into the last revision. I'm not sure we want to do that.
55
# - get a list of revisions that need to be pulled in
56
# - for each one, pull in that revision file
57
# and get the inventory, and store the inventory with right
59
# - and get the ancestry, and store that with right parents too
60
# - and keep a note of all file ids and version seen
61
# - then go through all files; for each one get the weave,
62
# and add in all file versions
65
44
class RepoFetcher(object):
66
45
"""Pull revisions and texts from one repository to another.
69
if set, try to limit to the data this revision references.
72
count_copied -- number of revisions copied
74
47
This should not be used directly, it's essential a object to encapsulate
75
48
the logic in InterRepository.fetch().
78
def __init__(self, to_repository, from_repository, last_revision=None, pb=None,
51
def __init__(self, to_repository, from_repository, last_revision=None,
52
find_ghosts=True, fetch_spec=None):
80
53
"""Create a repo fetcher.
55
:param last_revision: If set, try to limit to the data this revision
82
57
:param find_ghosts: If True search the entire history for ghosts.
85
self.failed_revisions = []
87
if to_repository.has_same_location(from_repository):
88
# repository.fetch should be taking care of this case.
89
raise errors.BzrError('RepoFetcher run '
90
'between two objects at the same location: '
91
'%r and %r' % (to_repository, from_repository))
59
# repository.fetch has the responsibility for short-circuiting
60
# attempts to copy between a repository and itself.
92
61
self.to_repository = to_repository
93
62
self.from_repository = from_repository
63
self.sink = to_repository._get_sink()
94
64
# must not mutate self._last_revision as its potentially a shared instance
95
65
self._last_revision = last_revision
66
self._fetch_spec = fetch_spec
96
67
self.find_ghosts = find_ghosts
98
self.pb = bzrlib.ui.ui_factory.nested_progress_bar()
99
self.nested_pb = self.pb
102
self.nested_pb = None
103
68
self.from_repository.lock_read()
69
mutter("Using fetch logic to copy between %s(%s) and %s(%s)",
70
self.from_repository, self.from_repository._format,
71
self.to_repository, self.to_repository._format)
105
self.to_repository.lock_write()
107
self.to_repository.start_write_group()
111
self.to_repository.abort_write_group()
114
self.to_repository.commit_write_group()
116
if self.nested_pb is not None:
117
self.nested_pb.finished()
118
self.to_repository.unlock()
120
75
self.from_repository.unlock()
122
77
def __fetch(self):
123
78
"""Primary worker function.
125
This initialises all the needed variables, and then fetches the
80
This initialises all the needed variables, and then fetches the
126
81
requested revisions, finally clearing the progress bar.
128
self.to_weaves = self.to_repository.weave_store
129
self.from_weaves = self.from_repository.weave_store
83
# Roughly this is what we're aiming for fetch to become:
85
# missing = self.sink.insert_stream(self.source.get_stream(search))
87
# missing = self.sink.insert_stream(self.source.get_items(missing))
130
89
self.count_total = 0
131
90
self.file_ids_names = {}
132
pp = ProgressPhase('Transferring', 4, self.pb)
91
pb = ui.ui_factory.nested_progress_bar()
92
pb.show_pct = pb.show_count = False
94
pb.update("Finding revisions", 0, 2)
135
95
search = self._revids_to_fetch()
136
96
if search is None:
138
if getattr(self, '_fetch_everything_for_search', None) is not None:
139
self._fetch_everything_for_search(search, pp)
141
# backward compatibility
142
self._fetch_everything_for_revisions(search.get_keys, pp)
98
pb.update("Fetching revisions", 1, 2)
99
self._fetch_everything_for_search(search)
146
def _fetch_everything_for_search(self, search, pp):
103
def _fetch_everything_for_search(self, search):
147
104
"""Fetch all data for the given set of revisions."""
148
105
# The first phase is "file". We pass the progress bar for it directly
149
106
# into item_keys_introduced_by, which has more information about how
153
110
# item_keys_introduced_by should have a richer API than it does at the
154
111
# moment, so that it can feed the progress information back to this
157
pb = bzrlib.ui.ui_factory.nested_progress_bar()
113
if (self.from_repository._format.rich_root_data and
114
not self.to_repository._format.rich_root_data):
115
raise errors.IncompatibleRepositories(
116
self.from_repository, self.to_repository,
117
"different rich-root support")
118
pb = ui.ui_factory.nested_progress_bar()
159
revs = search.get_keys()
160
data_to_fetch = self.from_repository.item_keys_introduced_by(revs, pb)
161
for knit_kind, file_id, revisions in data_to_fetch:
162
if knit_kind != phase:
164
# Make a new progress bar for this phase
167
pb = bzrlib.ui.ui_factory.nested_progress_bar()
168
if knit_kind == "file":
169
self._fetch_weave_text(file_id, revisions)
170
elif knit_kind == "inventory":
172
# Once we've processed all the files, then we generate the root
173
# texts (if necessary), then we process the inventory. It's a
174
# bit distasteful to have knit_kind == "inventory" mean this,
175
# perhaps it should happen on the first non-"file" knit, in case
176
# it's not always inventory?
177
self._generate_root_texts(revs)
178
self._fetch_inventory_weave(revs, pb)
179
elif knit_kind == "signatures":
180
# Nothing to do here; this will be taken care of when
181
# _fetch_revision_texts happens.
183
elif knit_kind == "revisions":
184
self._fetch_revision_texts(revs, pb)
186
raise AssertionError("Unknown knit kind %r" % knit_kind)
120
pb.update("Get stream source")
121
source = self.from_repository._get_source(
122
self.to_repository._format)
123
stream = source.get_stream(search)
124
from_format = self.from_repository._format
125
pb.update("Inserting stream")
126
resume_tokens, missing_keys = self.sink.insert_stream(
127
stream, from_format, [])
128
if self.to_repository._fallback_repositories:
130
self._parent_inventories(search.get_keys()))
132
pb.update("Missing keys")
133
stream = source.get_stream_for_missing_keys(missing_keys)
134
pb.update("Inserting missing keys")
135
resume_tokens, missing_keys = self.sink.insert_stream(
136
stream, from_format, resume_tokens)
138
raise AssertionError(
139
"second push failed to complete a fetch %r." % (
142
raise AssertionError(
143
"second push failed to commit the fetch %r." % (
145
pb.update("Finishing stream")
190
self.count_copied += len(revs)
192
150
def _revids_to_fetch(self):
193
151
"""Determines the exact revisions needed from self.from_repository to
194
152
install self._last_revision in self.to_repository.
196
154
If no revisions need to be fetched, then this just returns None.
156
if self._fetch_spec is not None:
157
return self._fetch_spec
198
158
mutter('fetch up to rev {%s}', self._last_revision)
199
159
if self._last_revision is NULL_REVISION:
200
160
# explicit limit of no revisions needed
202
if (self._last_revision is not None and
203
self.to_repository.has_revision(self._last_revision)):
206
return self.to_repository.search_missing_revision_ids(
207
self.from_repository, self._last_revision,
208
find_ghosts=self.find_ghosts)
209
except errors.NoSuchRevision:
210
raise InstallFailed([self._last_revision])
212
def _fetch_weave_text(self, file_id, required_versions):
213
to_weave = self.to_weaves.get_weave_or_empty(file_id,
214
self.to_repository.get_transaction())
215
from_weave = self.from_weaves.get_weave(file_id,
216
self.from_repository.get_transaction())
217
# we fetch all the texts, because texts do
218
# not reference anything, and its cheap enough
219
to_weave.join(from_weave, version_ids=required_versions)
220
# we don't need *all* of this data anymore, but we dont know
221
# what we do. This cache clearing will result in a new read
222
# of the knit data when we do the checkout, but probably we
223
# want to emit the needed data on the fly rather than at the
225
# the from weave should know not to cache data being joined,
226
# but its ok to ask it to clear.
227
from_weave.clear_cache()
228
to_weave.clear_cache()
230
def _fetch_inventory_weave(self, revs, pb):
231
pb.update("fetch inventory", 0, 2)
232
to_weave = self.to_repository.get_inventory_weave()
233
child_pb = bzrlib.ui.ui_factory.nested_progress_bar()
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.get_inventory_weave()
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.join(from_weave, pb=child_pb, msg='merge inventory',
246
from_weave.clear_cache()
250
def _generate_root_texts(self, revs):
251
"""This will be called by __fetch between fetching weave texts and
252
fetching the inventory weave.
254
Subclasses should override this if they need to generate root texts
255
after fetching weave texts.
260
class GenericRepoFetcher(RepoFetcher):
261
"""This is a generic repo to repo fetcher.
263
This makes minimal assumptions about repo layout and contents.
264
It triggers a reconciliation after fetching to ensure integrity.
267
def _fetch_revision_texts(self, revs, pb):
268
"""Fetch revision object texts"""
269
to_txn = self.to_transaction = self.to_repository.get_transaction()
272
to_store = self.to_repository._revision_store
274
pb.update('copying revisions', count, total)
276
sig_text = self.from_repository.get_signature_text(rev)
277
to_store.add_revision_signature_text(rev, sig_text, to_txn)
278
except errors.NoSuchRevision:
281
to_store.add_revision(self.from_repository.get_revision(rev),
284
# fixup inventory if needed:
285
# this is expensive because we have no inverse index to current ghosts.
286
# but on local disk its a few seconds and sftp push is already insane.
288
# FIXME: repository should inform if this is needed.
289
self.to_repository.reconcile()
292
class KnitRepoFetcher(RepoFetcher):
293
"""This is a knit format repository specific fetcher.
295
This differs from the GenericRepoFetcher by not doing a
296
reconciliation after copying, and using knit joining to
300
def _fetch_revision_texts(self, revs, pb):
301
# may need to be a InterRevisionStore call here.
302
from_transaction = self.from_repository.get_transaction()
303
to_transaction = self.to_repository.get_transaction()
304
to_sf = self.to_repository._revision_store.get_signature_file(
306
from_sf = self.from_repository._revision_store.get_signature_file(
308
to_sf.join(from_sf, version_ids=revs, ignore_missing=True)
309
to_rf = self.to_repository._revision_store.get_revision_file(
311
from_rf = self.from_repository._revision_store.get_revision_file(
313
to_rf.join(from_rf, version_ids=revs)
162
return self.to_repository.search_missing_revision_ids(
163
self.from_repository, self._last_revision,
164
find_ghosts=self.find_ghosts)
166
def _parent_inventories(self, revision_ids):
167
# Find all the parent revisions referenced by the stream, but
168
# not present in the stream, and make sure we send their
170
parent_maps = self.to_repository.get_parent_map(revision_ids)
172
map(parents.update, parent_maps.itervalues())
173
parents.discard(NULL_REVISION)
174
parents.difference_update(revision_ids)
175
missing_keys = set(('inventories', rev_id) for rev_id in parents)
316
179
class Inter1and2Helper(object):
317
180
"""Helper for operations that convert data from model 1 and 2
319
182
This is for use by fetchers and converters.
322
def __init__(self, source, target):
185
def __init__(self, source):
325
188
:param source: The repository data comes from
326
:param target: The repository data goes to
328
190
self.source = source
331
192
def iter_rev_trees(self, revs):
332
193
"""Iterate through RevisionTrees efficiently.
348
209
revs = revs[100:]
211
def _find_root_ids(self, revs, parent_map, graph):
213
for tree in self.iter_rev_trees(revs):
214
revision_id = tree.inventory.root.revision
215
root_id = tree.get_root_id()
216
revision_root[revision_id] = root_id
217
# Find out which parents we don't already know root ids for
219
for revision_parents in parent_map.itervalues():
220
parents.update(revision_parents)
221
parents.difference_update(revision_root.keys() + [NULL_REVISION])
222
# Limit to revisions present in the versionedfile
223
parents = graph.get_parent_map(parents).keys()
224
for tree in self.iter_rev_trees(parents):
225
root_id = tree.get_root_id()
226
revision_root[tree.get_revision_id()] = root_id
350
229
def generate_root_texts(self, revs):
351
230
"""Generate VersionedFiles for all root ids.
353
232
:param revs: the revisions to include
355
inventory_weave = self.source.get_inventory_weave()
358
to_store = self.target.weave_store
359
parent_map = self.source.get_graph().get_parent_map(revs)
360
for tree in self.iter_rev_trees(revs):
361
revision_id = tree.inventory.root.revision
362
root_id = tree.get_root_id()
363
parents = parent_map[revision_id]
364
if parents[0] == NULL_REVISION:
366
if root_id not in versionedfile:
367
versionedfile[root_id] = to_store.get_weave_or_empty(root_id,
368
self.target.get_transaction())
369
_, _, parent_texts[root_id] = versionedfile[root_id].add_lines(
370
revision_id, parents, [], parent_texts)
372
def regenerate_inventory(self, revs):
373
"""Generate a new inventory versionedfile in target, convertin data.
375
The inventory is retrieved from the source, (deserializing it), and
376
stored in the target (reserializing it in a different format).
377
:param revs: The revisions to include
379
for tree in self.iter_rev_trees(revs):
380
parents = tree.get_parent_ids()
381
self.target.add_inventory(tree.get_revision_id(), tree.inventory,
385
class Model1toKnit2Fetcher(GenericRepoFetcher):
386
"""Fetch from a Model1 repository into a Knit2 repository
388
def __init__(self, to_repository, from_repository, last_revision=None,
389
pb=None, find_ghosts=True):
390
self.helper = Inter1and2Helper(from_repository, to_repository)
391
GenericRepoFetcher.__init__(self, to_repository, from_repository,
392
last_revision, pb, find_ghosts)
394
def _generate_root_texts(self, revs):
395
self.helper.generate_root_texts(revs)
397
def _fetch_inventory_weave(self, revs, pb):
398
self.helper.regenerate_inventory(revs)
401
class Knit1to2Fetcher(KnitRepoFetcher):
402
"""Fetch from a Knit1 repository into a Knit2 repository"""
404
def __init__(self, to_repository, from_repository, last_revision=None,
405
pb=None, find_ghosts=True):
406
self.helper = Inter1and2Helper(from_repository, to_repository)
407
KnitRepoFetcher.__init__(self, to_repository, from_repository,
408
last_revision, pb, find_ghosts)
410
def _generate_root_texts(self, revs):
411
self.helper.generate_root_texts(revs)
413
def _fetch_inventory_weave(self, revs, pb):
414
self.helper.regenerate_inventory(revs)
417
class RemoteToOtherFetcher(GenericRepoFetcher):
419
def _fetch_everything_for_search(self, search, pp):
420
data_stream = self.from_repository.get_data_stream_for_search(search)
421
self.to_repository.insert_data_stream(data_stream)
234
graph = self.source.get_graph()
235
parent_map = graph.get_parent_map(revs)
236
rev_order = tsort.topo_sort(parent_map)
237
rev_id_to_root_id = self._find_root_ids(revs, parent_map, graph)
238
root_id_order = [(rev_id_to_root_id[rev_id], rev_id) for rev_id in
240
# Guaranteed stable, this groups all the file id operations together
241
# retaining topological order within the revisions of a file id.
242
# File id splits and joins would invalidate this, but they don't exist
243
# yet, and are unlikely to in non-rich-root environments anyway.
244
root_id_order.sort(key=operator.itemgetter(0))
245
# Create a record stream containing the roots to create.
247
# XXX: not covered by tests, should have a flag to always run
248
# this. -- mbp 20100129
249
graph = self.source_repo.get_known_graph_ancestry(revs)
250
new_roots_stream = _new_root_data_stream(
251
root_id_order, rev_id_to_root_id, parent_map, self.source, graph)
252
return [('texts', new_roots_stream)]
255
def _get_rich_root_heads_graph(source_repo, revision_ids):
256
"""Get a Graph object suitable for asking heads() for new rich roots."""
260
def _new_root_data_stream(
261
root_keys_to_create, rev_id_to_root_id_map, parent_map, repo, graph=None):
262
"""Generate a texts substream of synthesised root entries.
264
Used in fetches that do rich-root upgrades.
266
:param root_keys_to_create: iterable of (root_id, rev_id) pairs describing
267
the root entries to create.
268
:param rev_id_to_root_id_map: dict of known rev_id -> root_id mappings for
269
calculating the parents. If a parent rev_id is not found here then it
270
will be recalculated.
271
:param parent_map: a parent map for all the revisions in
273
:param graph: a graph to use instead of repo.get_graph().
275
for root_key in root_keys_to_create:
276
root_id, rev_id = root_key
277
parent_keys = _parent_keys_for_root_version(
278
root_id, rev_id, rev_id_to_root_id_map, parent_map, repo, graph)
279
yield versionedfile.FulltextContentFactory(
280
root_key, parent_keys, None, '')
283
def _parent_keys_for_root_version(
284
root_id, rev_id, rev_id_to_root_id_map, parent_map, repo, graph=None):
285
"""Get the parent keys for a given root id.
287
A helper function for _new_root_data_stream.
289
# Include direct parents of the revision, but only if they used the same
290
# root_id and are heads.
291
rev_parents = parent_map[rev_id]
293
for parent_id in rev_parents:
294
if parent_id == NULL_REVISION:
296
if parent_id not in rev_id_to_root_id_map:
297
# We probably didn't read this revision, go spend the extra effort
300
tree = repo.revision_tree(parent_id)
301
except errors.NoSuchRevision:
302
# Ghost, fill out rev_id_to_root_id in case we encounter this
304
# But set parent_root_id to None since we don't really know
305
parent_root_id = None
307
parent_root_id = tree.get_root_id()
308
rev_id_to_root_id_map[parent_id] = None
310
# rev_id_to_root_id_map[parent_id] = parent_root_id
311
# memory consumption maybe?
313
parent_root_id = rev_id_to_root_id_map[parent_id]
314
if root_id == parent_root_id:
315
# With stacking we _might_ want to refer to a non-local revision,
316
# but this code path only applies when we have the full content
317
# available, so ghosts really are ghosts, not just the edge of
319
parent_ids.append(parent_id)
321
# root_id may be in the parent anyway.
323
tree = repo.revision_tree(parent_id)
324
except errors.NoSuchRevision:
325
# ghost, can't refer to it.
329
parent_ids.append(tree.inventory[root_id].revision)
330
except errors.NoSuchId:
333
# Drop non-head parents
335
graph = repo.get_graph()
336
heads = graph.heads(parent_ids)
338
for parent_id in parent_ids:
339
if parent_id in heads and parent_id not in selected_ids:
340
selected_ids.append(parent_id)
341
parent_keys = [(root_id, parent_id) for parent_id in selected_ids]
added
removed
bzrlib/fetch.py
