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revs = self._revids_to_fetch()
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self._fetch_weave_texts(revs)
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self._fetch_inventory_weave(revs)
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self._fetch_revision_texts(revs)
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self.count_copied += len(revs)
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self._fetch_everything_for_revisions(revs, pp)
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def _fetch_everything_for_revisions(self, revs, pp):
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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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# that phase is progressing than we do. Progress updates for the other
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# phases are taken care of in this function.
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# XXX: there should be a clear owner of the progress reporting. Perhaps
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# item_keys_introduced_by should have a richer API than it does at the
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# moment, so that it can feed the progress information back to this
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pb = bzrlib.ui.ui_factory.nested_progress_bar()
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data_to_fetch = self.from_repository.item_keys_introduced_by(revs, pb)
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for knit_kind, file_id, revisions in data_to_fetch:
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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()
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if knit_kind == "file":
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self._fetch_weave_text(file_id, revisions)
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elif knit_kind == "inventory":
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# Once we've processed all the files, then we generate the root
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# texts (if necessary), then we process the inventory. It's a
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# bit distasteful to have knit_kind == "inventory" mean this,
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# perhaps it should happen on the first non-"file" knit, in case
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# it's not always inventory?
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self._generate_root_texts(revs)
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self._fetch_inventory_weave(revs, pb)
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elif knit_kind == "signatures":
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# Nothing to do here; this will be taken care of when
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# _fetch_revision_texts happens.
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elif knit_kind == "revisions":
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self._fetch_revision_texts(revs, pb)
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raise AssertionError("Unknown knit kind %r" % knit_kind)
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self.count_copied += len(revs)
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def _revids_to_fetch(self):
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"""Determines the exact revisions needed from self.from_repository to
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install self._last_revision in self.to_repository.
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If no revisions need to be fetched, then this just returns None.
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mutter('fetch up to rev {%s}', self._last_revision)
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if self._last_revision is NULL_REVISION:
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# explicit limit of no revisions needed
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except errors.NoSuchRevision:
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raise InstallFailed([self._last_revision])
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def _fetch_weave_texts(self, revs):
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texts_pb = bzrlib.ui.ui_factory.nested_progress_bar()
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# fileids_altered_by_revision_ids requires reading the inventory
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# weave, we will need to read the inventory weave again when
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# all this is done, so enable caching for that specific weave
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inv_w = self.from_repository.get_inventory_weave()
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file_ids = self.from_repository.fileids_altered_by_revision_ids(revs)
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num_file_ids = len(file_ids)
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for file_id, required_versions in file_ids.items():
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texts_pb.update("fetch texts", count, num_file_ids)
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to_weave = self.to_weaves.get_weave_or_empty(file_id,
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self.to_repository.get_transaction())
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from_weave = self.from_weaves.get_weave(file_id,
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self.from_repository.get_transaction())
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# we fetch all the texts, because texts do
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# not reference anything, and its cheap enough
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to_weave.join(from_weave, version_ids=required_versions)
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# we don't need *all* of this data anymore, but we dont know
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# what we do. This cache clearing will result in a new read
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# of the knit data when we do the checkout, but probably we
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# want to emit the needed data on the fly rather than at the
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# the from weave should know not to cache data being joined,
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# but its ok to ask it to clear.
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from_weave.clear_cache()
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to_weave.clear_cache()
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def _fetch_inventory_weave(self, revs):
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pb = bzrlib.ui.ui_factory.nested_progress_bar()
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pb.update("fetch inventory", 0, 2)
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to_weave = self.to_control.get_weave('inventory',
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self.to_repository.get_transaction())
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child_pb = bzrlib.ui.ui_factory.nested_progress_bar()
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# just merge, this is optimisable and its means we don't
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# copy unreferenced data such as not-needed inventories.
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pb.update("fetch inventory", 1, 3)
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from_weave = self.from_repository.get_inventory_weave()
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pb.update("fetch inventory", 2, 3)
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# we fetch only the referenced inventories because we do not
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# know for unselected inventories whether all their required
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# texts are present in the other repository - it could be
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to_weave.join(from_weave, pb=child_pb, msg='merge inventory',
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from_weave.clear_cache()
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def _fetch_weave_text(self, file_id, required_versions):
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to_weave = self.to_weaves.get_weave_or_empty(file_id,
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self.to_repository.get_transaction())
207
from_weave = self.from_weaves.get_weave(file_id,
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self.from_repository.get_transaction())
209
# we fetch all the texts, because texts do
210
# not reference anything, and its cheap enough
211
to_weave.join(from_weave, version_ids=required_versions)
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# we don't need *all* of this data anymore, but we dont know
213
# what we do. This cache clearing will result in a new read
214
# of the knit data when we do the checkout, but probably we
215
# want to emit the needed data on the fly rather than at the
217
# the from weave should know not to cache data being joined,
218
# but its ok to ask it to clear.
219
from_weave.clear_cache()
220
to_weave.clear_cache()
222
def _fetch_inventory_weave(self, revs, pb):
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pb.update("fetch inventory", 0, 2)
224
to_weave = self.to_control.get_weave('inventory',
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self.to_repository.get_transaction())
227
child_pb = bzrlib.ui.ui_factory.nested_progress_bar()
229
# just merge, this is optimisable and its means we don't
230
# copy unreferenced data such as not-needed inventories.
231
pb.update("fetch inventory", 1, 3)
232
from_weave = self.from_repository.get_inventory_weave()
233
pb.update("fetch inventory", 2, 3)
234
# we fetch only the referenced inventories because we do not
235
# know for unselected inventories whether all their required
236
# texts are present in the other repository - it could be
238
to_weave.join(from_weave, pb=child_pb, msg='merge inventory',
240
from_weave.clear_cache()
244
def _generate_root_texts(self, revs):
245
"""This will be called by __fetch between fetching weave texts and
246
fetching the inventory weave.
248
Subclasses should override this if they need to generate root texts
249
after fetching weave texts.
222
254
class GenericRepoFetcher(RepoFetcher):
223
255
"""This is a generic repo to repo fetcher.
226
258
It triggers a reconciliation after fetching to ensure integrity.
229
def _fetch_revision_texts(self, revs):
261
def _fetch_revision_texts(self, revs, pb):
230
262
"""Fetch revision object texts"""
231
rev_pb = bzrlib.ui.ui_factory.nested_progress_bar()
233
to_txn = self.to_transaction = self.to_repository.get_transaction()
236
to_store = self.to_repository._revision_store
238
pb = bzrlib.ui.ui_factory.nested_progress_bar()
240
pb.update('copying revisions', count, total)
242
sig_text = self.from_repository.get_signature_text(rev)
243
to_store.add_revision_signature_text(rev, sig_text, to_txn)
244
except errors.NoSuchRevision:
247
to_store.add_revision(self.from_repository.get_revision(rev),
252
# fixup inventory if needed:
253
# this is expensive because we have no inverse index to current ghosts.
254
# but on local disk its a few seconds and sftp push is already insane.
256
# FIXME: repository should inform if this is needed.
257
self.to_repository.reconcile()
263
to_txn = self.to_transaction = self.to_repository.get_transaction()
266
to_store = self.to_repository._revision_store
268
pb.update('copying revisions', count, total)
270
sig_text = self.from_repository.get_signature_text(rev)
271
to_store.add_revision_signature_text(rev, sig_text, to_txn)
272
except errors.NoSuchRevision:
275
to_store.add_revision(self.from_repository.get_revision(rev),
278
# fixup inventory if needed:
279
# this is expensive because we have no inverse index to current ghosts.
280
# but on local disk its a few seconds and sftp push is already insane.
282
# FIXME: repository should inform if this is needed.
283
self.to_repository.reconcile()
262
286
class KnitRepoFetcher(RepoFetcher):
375
397
KnitRepoFetcher.__init__(self, to_repository, from_repository,
376
398
last_revision, pb)
378
def _fetch_weave_texts(self, revs):
379
KnitRepoFetcher._fetch_weave_texts(self, revs)
380
# Now generate a weave for the tree root
400
def _generate_root_texts(self, revs):
381
401
self.helper.generate_root_texts(revs)
383
def _fetch_inventory_weave(self, revs):
403
def _fetch_inventory_weave(self, revs, pb):
384
404
self.helper.regenerate_inventory(revs)
387
class Fetcher(object):
388
"""Backwards compatibility glue for branch.fetch()."""
390
@deprecated_method(zero_eight)
391
def __init__(self, to_branch, from_branch, last_revision=None, pb=None):
392
"""Please see branch.fetch()."""
393
to_branch.fetch(from_branch, last_revision, pb)