60
59
# and add in all file versions
63
@deprecated_function(zero_eight)
64
63
def greedy_fetch(to_branch, from_branch, revision=None, pb=None):
65
"""Legacy API, please see branch.fetch(from_branch, last_revision, pb)."""
66
64
f = Fetcher(to_branch, from_branch, revision, pb)
67
65
return f.count_copied, f.failed_revisions
72
class RepoFetcher(object):
73
"""Pull revisions and texts from one repository to another.
76
if set, try to limit to the data this revision references.
69
class Fetcher(object):
70
"""Pull revisions and texts from one branch to another.
72
This doesn't update the destination's history; that can be done
73
separately if desired.
76
If set, pull only up to this revision_id.
80
last_revision -- if last_revision
81
is given it will be that, otherwise the last revision of
79
84
count_copied -- number of revisions copied
81
This should not be used directory, its essential a object to encapsulate
82
the logic in InterRepository.fetch().
86
count_weaves -- number of file weaves copied
84
def __init__(self, to_repository, from_repository, last_revision=None, pb=None):
88
def __init__(self, to_branch, from_branch, last_revision=None, pb=None):
89
if to_branch == from_branch:
90
raise Exception("can't fetch from a branch to itself")
91
self.to_branch = to_branch
92
self.to_weaves = to_branch.weave_store
93
self.to_control = to_branch.control_weaves
94
self.from_branch = from_branch
95
self.from_weaves = from_branch.weave_store
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self.from_control = from_branch.control_weaves
86
97
self.failed_revisions = []
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98
self.count_copied = 0
88
if to_repository.control_files._transport.base == from_repository.control_files._transport.base:
89
# check that last_revision is in 'from' and then return a no-operation.
90
if last_revision not in (None, NULL_REVISION):
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from_repository.get_revision(last_revision)
93
self.to_repository = to_repository
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self.from_repository = from_repository
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# must not mutate self._last_revision as its potentially a shared instance
96
self._last_revision = last_revision
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self.count_weaves = 0
101
self.copied_file_ids = set()
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self.pb = bzrlib.ui.ui_factory.nested_progress_bar()
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self.nested_pb = self.pb
103
self.pb = bzrlib.ui.ui_factory.progress_bar()
102
self.nested_pb = None
103
self.from_repository.lock_read()
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self.to_repository.lock_write()
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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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"""Primary worker function.
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This initialises all the needed variables, and then fetches the
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requested revisions, finally clearing the progress bar.
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self.to_weaves = self.to_repository.weave_store
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self.to_control = self.to_repository.control_weaves
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self.from_weaves = self.from_repository.weave_store
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self.from_control = self.from_repository.control_weaves
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self.file_ids_names = {}
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pp = ProgressPhase('fetch phase', 4, self.pb)
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revs = self._revids_to_fetch()
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self._fetch_weave_texts(revs)
135
self._fetch_inventory_weave(revs)
137
self._fetch_revision_texts(revs)
138
self.count_copied += len(revs)
106
self.from_branch.lock_read()
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self._fetch_revisions(last_revision)
110
self.from_branch.unlock()
142
def _revids_to_fetch(self):
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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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if (self._last_revision != None and
148
self.to_repository.has_revision(self._last_revision)):
113
def _fetch_revisions(self, last_revision):
115
self.last_revision = self._find_last_revision(last_revision)
116
except NoSuchRevision, e:
117
mutter('failed getting last revision: %s', e)
118
raise InstallFailed([last_revision])
119
mutter('fetch up to rev {%s}', self.last_revision)
120
if (self.last_revision is not None and
121
self.to_branch.has_revision(self.last_revision)):
124
revs_to_fetch = self._compare_ancestries()
126
raise InstallFailed([self.last_revision])
127
self._copy_revisions(revs_to_fetch)
128
self.new_ancestry = revs_to_fetch
130
def _find_last_revision(self, last_revision):
131
"""Find the limiting source revision.
133
Every ancestor of that revision will be merged across.
135
Returns the revision_id, or returns None if there's no history
136
in the source branch."""
137
self.pb.update('get source history')
138
from_history = self.from_branch.revision_history()
139
self.pb.update('get destination history')
141
self.from_branch.get_revision(last_revision)
144
return from_history[-1]
146
return None # no history in the source branch
152
return self.to_repository.missing_revision_ids(self.from_repository,
154
except errors.NoSuchRevision:
155
raise InstallFailed([self._last_revision])
157
def _fetch_weave_texts(self, revs):
158
texts_pb = bzrlib.ui.ui_factory.nested_progress_bar()
160
file_ids = self.from_repository.fileid_involved_by_set(revs)
162
num_file_ids = len(file_ids)
163
for file_id in file_ids:
164
texts_pb.update("fetch texts", count, num_file_ids)
166
to_weave = self.to_weaves.get_weave_or_empty(file_id,
167
self.to_repository.get_transaction())
168
from_weave = self.from_weaves.get_weave(file_id,
169
self.from_repository.get_transaction())
170
# we fetch all the texts, because texts do
171
# not reference anything, and its cheap enough
172
to_weave.join(from_weave)
176
def _fetch_inventory_weave(self, revs):
177
pb = bzrlib.ui.ui_factory.nested_progress_bar()
179
pb.update("fetch inventory", 0, 2)
180
to_weave = self.to_control.get_weave('inventory',
181
self.to_repository.get_transaction())
183
child_pb = bzrlib.ui.ui_factory.nested_progress_bar()
185
# just merge, this is optimisable and its means we dont
186
# copy unreferenced data such as not-needed inventories.
187
pb.update("fetch inventory", 1, 3)
188
from_weave = self.from_repository.get_inventory_weave()
189
pb.update("fetch inventory", 2, 3)
190
# we fetch only the referenced inventories because we do not
191
# know for unselected inventories whether all their required
192
# texts are present in the other repository - it could be
194
to_weave.join(from_weave, pb=child_pb, msg='merge inventory',
202
class GenericRepoFetcher(RepoFetcher):
203
"""This is a generic repo to repo fetcher.
205
This makes minimal assumptions about repo layout and contents.
206
It triggers a reconciliation after fetching to ensure integrity.
209
def _fetch_revision_texts(self, revs):
210
"""Fetch revision object texts"""
211
rev_pb = bzrlib.ui.ui_factory.nested_progress_bar()
213
to_txn = self.to_transaction = self.to_repository.get_transaction()
216
to_store = self.to_repository._revision_store
218
pb = bzrlib.ui.ui_factory.nested_progress_bar()
220
pb.update('copying revisions', count, total)
222
sig_text = self.from_repository.get_signature_text(rev)
223
to_store.add_revision_signature_text(rev, sig_text, to_txn)
224
except errors.NoSuchRevision:
227
to_store.add_revision(self.from_repository.get_revision(rev),
232
# fixup inventory if needed:
233
# this is expensive because we have no inverse index to current ghosts.
234
# but on local disk its a few seconds and sftp push is already insane.
236
# FIXME: repository should inform if this is needed.
237
self.to_repository.reconcile()
242
class KnitRepoFetcher(RepoFetcher):
243
"""This is a knit format repository specific fetcher.
245
This differs from the GenericRepoFetcher by not doing a
246
reconciliation after copying, and using knit joining to
250
def _fetch_revision_texts(self, revs):
251
# may need to be a InterRevisionStore call here.
252
from_transaction = self.from_repository.get_transaction()
253
to_transaction = self.to_repository.get_transaction()
254
to_sf = self.to_repository._revision_store.get_signature_file(
256
from_sf = self.from_repository._revision_store.get_signature_file(
258
to_sf.join(from_sf, version_ids=revs, ignore_missing=True)
259
to_rf = self.to_repository._revision_store.get_revision_file(
261
from_rf = self.from_repository._revision_store.get_revision_file(
263
to_rf.join(from_rf, version_ids=revs)
266
class Fetcher(object):
267
"""Backwards compatability glue for branch.fetch()."""
269
@deprecated_method(zero_eight)
270
def __init__(self, to_branch, from_branch, last_revision=None, pb=None):
271
"""Please see branch.fetch()."""
272
to_branch.fetch(from_branch, last_revision, pb)
149
def _compare_ancestries(self):
150
"""Get a list of revisions that must be copied.
152
That is, every revision that's in the ancestry of the source
153
branch and not in the destination branch."""
154
self.pb.update('get source ancestry')
155
self.from_ancestry = self.from_branch.get_ancestry(self.last_revision)
157
dest_last_rev = self.to_branch.last_revision()
158
self.pb.update('get destination ancestry')
160
dest_ancestry = self.to_branch.get_ancestry(dest_last_rev)
163
ss = set(dest_ancestry)
165
for rev_id in self.from_ancestry:
167
to_fetch.append(rev_id)
168
mutter('need to get revision {%s}', rev_id)
169
mutter('need to get %d revisions in total', len(to_fetch))
170
self.count_total = len(to_fetch)
173
def _copy_revisions(self, revs_to_fetch):
175
for rev_id in revs_to_fetch:
179
if self.to_branch.has_revision(rev_id):
181
self.pb.update('fetch revision', i, self.count_total)
182
self._copy_one_revision(rev_id)
183
self.count_copied += 1
186
def _copy_one_revision(self, rev_id):
187
"""Copy revision and everything referenced by it."""
188
mutter('copying revision {%s}', rev_id)
189
rev_xml = self.from_branch.get_revision_xml(rev_id)
190
inv_xml = self.from_branch.get_inventory_xml(rev_id)
191
rev = serializer_v5.read_revision_from_string(rev_xml)
192
inv = serializer_v5.read_inventory_from_string(inv_xml)
193
assert rev.revision_id == rev_id
194
assert rev.inventory_sha1 == sha_string(inv_xml)
195
mutter(' commiter %s, %d parents',
198
self._copy_new_texts(rev_id, inv)
199
parents = rev.parent_ids
200
for parent in parents:
201
if not self.to_branch.has_revision(parent):
202
parents.pop(parents.index(parent))
203
self._copy_inventory(rev_id, inv_xml, parents)
204
self.to_branch.revision_store.add(StringIO(rev_xml), rev_id)
205
mutter('copied revision %s', rev_id)
208
def _copy_inventory(self, rev_id, inv_xml, parent_ids):
209
self.to_control.add_text('inventory', rev_id,
210
split_lines(inv_xml), parent_ids,
211
self.to_branch.get_transaction())
213
def _copy_new_texts(self, rev_id, inv):
214
"""Copy any new texts occuring in this revision."""
215
# TODO: Rather than writing out weaves every time, hold them
216
# in memory until everything's done? But this way is nicer
217
# if it's interrupted.
218
for path, ie in inv.iter_entries():
219
if ie.revision != rev_id:
221
mutter('%s {%s} is changed in this revision',
223
self._copy_one_weave(rev_id, ie.file_id)
226
def _copy_one_weave(self, rev_id, file_id):
227
"""Copy one file weave."""
228
mutter('copy file {%s} modified in {%s}', file_id, rev_id)
229
if file_id in self.copied_file_ids:
230
mutter('file {%s} already copied', file_id)
232
from_weave = self.from_weaves.get_weave(file_id,
233
self.from_branch.get_transaction())
234
to_weave = self.to_weaves.get_weave_or_empty(file_id,
235
self.to_branch.get_transaction())
237
to_weave.join(from_weave)
238
except errors.WeaveParentMismatch:
239
to_weave.reweave(from_weave)
240
self.to_weaves.put_weave(file_id, to_weave,
241
self.to_branch.get_transaction())
242
self.count_weaves += 1
243
self.copied_file_ids.add(file_id)
244
mutter('copied file {%s}', file_id)
added
removed
bzrlib/fetch.py
