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,
38
from bzrlib.trace import mutter
39
from bzrlib.progress import ProgressPhase
43
40
from bzrlib.revision import NULL_REVISION
44
from bzrlib.trace import mutter
41
from bzrlib.symbol_versioning import (deprecated_function,
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
@deprecated_function(zero_eight)
66
def greedy_fetch(to_branch, from_branch, revision=None, pb=None):
67
"""Legacy API, please see branch.fetch(from_branch, last_revision, pb)."""
68
f = Fetcher(to_branch, from_branch, revision, pb)
69
return f.count_copied, f.failed_revisions
47
74
class RepoFetcher(object):
48
75
"""Pull revisions and texts from one repository to another.
50
This should not be used directly, it's essential a object to encapsulate
78
if set, try to limit to the data this revision references.
81
count_copied -- number of revisions copied
83
This should not be used directory, its essential a object to encapsulate
51
84
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):
56
"""Create a repo fetcher.
58
:param last_revision: If set, try to limit to the data this revision
60
: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
def __init__(self, to_repository, from_repository, last_revision=None, pb=None):
88
self.failed_revisions = []
90
if to_repository.control_files._transport.base == from_repository.control_files._transport.base:
91
# check that last_revision is in 'from' and then return a no-operation.
92
if last_revision not in (None, NULL_REVISION):
93
from_repository.get_revision(last_revision)
71
95
self.to_repository = to_repository
72
96
self.from_repository = from_repository
73
self.sink = to_repository._get_sink()
74
97
# must not mutate self._last_revision as its potentially a shared instance
75
98
self._last_revision = last_revision
76
self._fetch_spec = fetch_spec
77
self.find_ghosts = find_ghosts
100
self.pb = bzrlib.ui.ui_factory.nested_progress_bar()
101
self.nested_pb = self.pb
104
self.nested_pb = None
78
105
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)
107
self.to_repository.lock_write()
111
if self.nested_pb is not None:
112
self.nested_pb.finished()
113
self.to_repository.unlock()
85
115
self.from_repository.unlock()
87
117
def __fetch(self):
88
118
"""Primary worker function.
90
This initialises all the needed variables, and then fetches the
120
This initialises all the needed variables, and then fetches the
91
121
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))
123
self.to_weaves = self.to_repository.weave_store
124
self.to_control = self.to_repository.control_weaves
125
self.from_weaves = self.from_repository.weave_store
126
self.from_control = self.from_repository.control_weaves
99
127
self.count_total = 0
100
128
self.file_ids_names = {}
101
pb = ui.ui_factory.nested_progress_bar()
102
pb.show_pct = pb.show_count = False
104
pb.update("Finding revisions", 0, 2)
105
search = self._revids_to_fetch()
108
pb.update("Fetching revisions", 1, 2)
109
self._fetch_everything_for_search(search)
113
def _fetch_everything_for_search(self, search):
114
"""Fetch all data for the given set of revisions."""
115
# The first phase is "file". We pass the progress bar for it directly
116
# into item_keys_introduced_by, which has more information about how
117
# that phase is progressing than we do. Progress updates for the other
118
# phases are taken care of in this function.
119
# XXX: there should be a clear owner of the progress reporting. Perhaps
120
# item_keys_introduced_by should have a richer API than it does at the
121
# 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()
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")
129
pp = ProgressPhase('Fetch phase', 4, self.pb)
132
revs = self._revids_to_fetch()
136
self._fetch_weave_texts(revs)
138
self._fetch_inventory_weave(revs)
140
self._fetch_revision_texts(revs)
141
self.count_copied += len(revs)
160
145
def _revids_to_fetch(self):
161
"""Determines the exact revisions needed from self.from_repository to
162
install self._last_revision in self.to_repository.
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
168
146
mutter('fetch up to rev {%s}', self._last_revision)
169
147
if self._last_revision is NULL_REVISION:
170
148
# 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)
189
class Inter1and2Helper(object):
190
"""Helper for operations that convert data from model 1 and 2
192
This is for use by fetchers and converters.
195
def __init__(self, source):
198
:param source: The repository data comes from
202
def iter_rev_trees(self, revs):
203
"""Iterate through RevisionTrees efficiently.
205
Additionally, the inventory's revision_id is set if unset.
207
Trees are retrieved in batches of 100, and then yielded in the order
210
:param revs: A list of revision ids
212
# In case that revs is not a list.
215
for tree in self.source.revision_trees(revs[:100]):
216
if tree.inventory.revision_id is None:
217
tree.inventory.revision_id = tree.get_revision_id()
221
def _find_root_ids(self, revs, parent_map, graph):
223
for tree in self.iter_rev_trees(revs):
224
revision_id = tree.inventory.root.revision
225
root_id = tree.get_root_id()
226
revision_root[revision_id] = root_id
227
# Find out which parents we don't already know root ids for
229
for revision_parents in parent_map.itervalues():
230
parents.update(revision_parents)
231
parents.difference_update(revision_root.keys() + [NULL_REVISION])
232
# Limit to revisions present in the versionedfile
233
parents = graph.get_parent_map(parents).keys()
234
for tree in self.iter_rev_trees(parents):
235
root_id = tree.get_root_id()
236
revision_root[tree.get_revision_id()] = root_id
239
def generate_root_texts(self, revs):
240
"""Generate VersionedFiles for all root ids.
242
:param revs: the revisions to include
244
graph = self.source.get_graph()
245
parent_map = graph.get_parent_map(revs)
246
rev_order = tsort.topo_sort(parent_map)
247
rev_id_to_root_id = self._find_root_ids(revs, parent_map, graph)
248
root_id_order = [(rev_id_to_root_id[rev_id], rev_id) for rev_id in
250
# Guaranteed stable, this groups all the file id operations together
251
# retaining topological order within the revisions of a file id.
252
# File id splits and joins would invalidate this, but they don't exist
253
# yet, and are unlikely to in non-rich-root environments anyway.
254
root_id_order.sort(key=operator.itemgetter(0))
255
# 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.
150
if (self._last_revision != None and
151
self.to_repository.has_revision(self._last_revision)):
155
return self.to_repository.missing_revision_ids(self.from_repository,
157
except errors.NoSuchRevision:
158
raise InstallFailed([self._last_revision])
160
def _fetch_weave_texts(self, revs):
161
texts_pb = bzrlib.ui.ui_factory.nested_progress_bar()
163
file_ids = self.from_repository.fileids_altered_by_revision_ids(revs)
165
num_file_ids = len(file_ids)
166
for file_id, required_versions in file_ids.items():
167
texts_pb.update("fetch texts", count, num_file_ids)
169
to_weave = self.to_weaves.get_weave_or_empty(file_id,
170
self.to_repository.get_transaction())
171
from_weave = self.from_weaves.get_weave(file_id,
172
self.from_repository.get_transaction())
173
# we fetch all the texts, because texts do
174
# not reference anything, and its cheap enough
175
to_weave.join(from_weave, version_ids=required_versions)
176
# we don't need *all* of this data anymore, but we dont know
177
# what we do. This cache clearing will result in a new read
178
# of the knit data when we do the checkout, but probably we
179
# want to emit the needed data on the fly rather than at the
181
# the from weave should know not to cache data being joined,
182
# but its ok to ask it to clear.
183
from_weave.clear_cache()
184
to_weave.clear_cache()
188
def _fetch_inventory_weave(self, revs):
189
pb = bzrlib.ui.ui_factory.nested_progress_bar()
191
pb.update("fetch inventory", 0, 2)
192
to_weave = self.to_control.get_weave('inventory',
193
self.to_repository.get_transaction())
195
child_pb = bzrlib.ui.ui_factory.nested_progress_bar()
197
# just merge, this is optimisable and its means we don't
198
# copy unreferenced data such as not-needed inventories.
199
pb.update("fetch inventory", 1, 3)
200
from_weave = self.from_repository.get_inventory_weave()
201
pb.update("fetch inventory", 2, 3)
202
# we fetch only the referenced inventories because we do not
203
# know for unselected inventories whether all their required
204
# texts are present in the other repository - it could be
206
to_weave.join(from_weave, pb=child_pb, msg='merge inventory',
214
class GenericRepoFetcher(RepoFetcher):
215
"""This is a generic repo to repo fetcher.
217
This makes minimal assumptions about repo layout and contents.
218
It triggers a reconciliation after fetching to ensure integrity.
221
def _fetch_revision_texts(self, revs):
222
"""Fetch revision object texts"""
223
rev_pb = bzrlib.ui.ui_factory.nested_progress_bar()
225
to_txn = self.to_transaction = self.to_repository.get_transaction()
228
to_store = self.to_repository._revision_store
230
pb = bzrlib.ui.ui_factory.nested_progress_bar()
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]
232
pb.update('copying revisions', count, total)
234
sig_text = self.from_repository.get_signature_text(rev)
235
to_store.add_revision_signature_text(rev, sig_text, to_txn)
236
except errors.NoSuchRevision:
239
to_store.add_revision(self.from_repository.get_revision(rev),
244
# fixup inventory if needed:
245
# this is expensive because we have no inverse index to current ghosts.
246
# but on local disk its a few seconds and sftp push is already insane.
248
# FIXME: repository should inform if this is needed.
249
self.to_repository.reconcile()
254
class KnitRepoFetcher(RepoFetcher):
255
"""This is a knit format repository specific fetcher.
257
This differs from the GenericRepoFetcher by not doing a
258
reconciliation after copying, and using knit joining to
262
def _fetch_revision_texts(self, revs):
263
# may need to be a InterRevisionStore call here.
264
from_transaction = self.from_repository.get_transaction()
265
to_transaction = self.to_repository.get_transaction()
266
to_sf = self.to_repository._revision_store.get_signature_file(
268
from_sf = self.from_repository._revision_store.get_signature_file(
270
to_sf.join(from_sf, version_ids=revs, ignore_missing=True)
271
to_rf = self.to_repository._revision_store.get_revision_file(
273
from_rf = self.from_repository._revision_store.get_revision_file(
275
to_rf.join(from_rf, version_ids=revs)
278
class Fetcher(object):
279
"""Backwards compatibility glue for branch.fetch()."""
281
@deprecated_method(zero_eight)
282
def __init__(self, to_branch, from_branch, last_revision=None, pb=None):
283
"""Please see branch.fetch()."""
284
to_branch.fetch(from_branch, last_revision, pb)
added
removed
bzrlib/fetch.py
