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self.from_branch.lock_read()
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self._fetch_revisions(last_revision)
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revs = self._revids_to_fetch(last_revision )
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self._fetch_revision_texts( revs )
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self._fetch_weave_texts( revs )
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self._fetch_inventory_weave( revs )
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self.count_copied += len(revs)
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self.from_branch.unlock()
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def _fetch_revisions(self, last_revision):
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def _revids_to_fetch(self, last_revision):
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self.last_revision = self._find_last_revision(last_revision)
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mutter('fetch up to rev {%s}', self.last_revision)
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if (self.last_revision is not None and
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self.to_branch.has_revision(self.last_revision)):
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revs_to_fetch = self._compare_ancestries()
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branch_from_revs = set(self.from_branch.get_ancestry(self.last_revision))
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130
except WeaveError:
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raise InstallFailed([self.last_revision])
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self._copy_revisions(revs_to_fetch)
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self.new_ancestry = revs_to_fetch
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self.dest_last_rev = self.to_branch.last_revision()
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branch_to_revs = set(self.to_branch.get_ancestry(self.dest_last_rev))
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return branch_from_revs.difference( branch_to_revs )
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def _fetch_revision_texts( self, revs ):
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self.to_branch.revision_store.copy_multi(
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self.from_branch.revision_store, revs )
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def _fetch_weave_texts( self, revs ):
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file_ids = self.from_branch.fileid_involved_by_set( revs )
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num_file_ids = len(file_ids)
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for file_id in file_ids:
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self.pb.update( "merge weave merge",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_branch.get_transaction())
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from_weave = self.from_weaves.get_weave(file_id,
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self.from_branch.get_transaction())
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if to_weave.numversions() > 0:
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# destination has contents, must merge
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to_weave.join(from_weave)
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except errors.WeaveParentMismatch:
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to_weave.reweave(from_weave)
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# destination is empty, just replace it
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to_weave = from_weave.copy( )
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self.to_weaves.put_weave(file_id, to_weave,
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self.to_branch.get_transaction())
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def _fetch_inventory_weave( self, revs ):
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self.pb.update( "inventory merge",0,1)
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from_weave = self.from_control.get_weave('inventory',
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self.from_branch.get_transaction())
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to_weave = self.to_control.get_weave('inventory',
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self.to_branch.get_transaction())
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if to_weave.numversions() > 0:
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# destination has contents, must merge
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to_weave.join(from_weave)
181
except errors.WeaveParentMismatch:
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to_weave.reweave(from_weave)
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# destination is empty, just replace it
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to_weave = from_weave.copy( )
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self.to_control.put_weave('inventory', to_weave,
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self.to_branch.get_transaction())
129
192
def _find_last_revision(self, last_revision):
130
193
"""Find the limiting source revision.
142
205
return from_history[-1]
144
207
return None # no history in the source branch
147
def _compare_ancestries(self):
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"""Get a list of revisions that must be copied.
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That is, every revision that's in the ancestry of the source
151
branch and not in the destination branch."""
152
self.pb.update('get source ancestry')
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self.from_ancestry = self.from_branch.get_ancestry(self.last_revision)
155
dest_last_rev = self.to_branch.last_revision()
156
self.pb.update('get destination ancestry')
158
dest_ancestry = self.to_branch.get_ancestry(dest_last_rev)
161
ss = set(dest_ancestry)
163
for rev_id in self.from_ancestry:
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to_fetch.append(rev_id)
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mutter('need to get revision {%s}', rev_id)
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mutter('need to get %d revisions in total', len(to_fetch))
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self.count_total = len(to_fetch)
171
def _copy_revisions(self, revs_to_fetch):
173
for rev_id in revs_to_fetch:
177
if self.to_branch.has_revision(rev_id):
179
self.pb.update('copy revision', i, self.count_total)
180
self._copy_one_revision(rev_id)
181
self.count_copied += 1
184
def _copy_one_revision(self, rev_id):
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"""Copy revision and everything referenced by it."""
186
mutter('copying revision {%s}', rev_id)
187
rev_xml = self.from_branch.get_revision_xml(rev_id)
188
inv_xml = self.from_branch.get_inventory_xml(rev_id)
189
rev = serializer_v5.read_revision_from_string(rev_xml)
190
inv = serializer_v5.read_inventory_from_string(inv_xml)
191
assert rev.revision_id == rev_id
192
assert rev.inventory_sha1 == sha_string(inv_xml)
193
mutter(' commiter %s, %d parents',
196
self._copy_new_texts(rev_id, inv)
197
parents = rev.parent_ids
198
new_parents = copy(parents)
199
for parent in parents:
200
if not self.to_branch.has_revision(parent):
201
new_parents.pop(new_parents.index(parent))
202
self._copy_inventory(rev_id, inv_xml, new_parents)
203
self.to_branch.revision_store.add(StringIO(rev_xml), rev_id)
204
mutter('copied revision %s', rev_id)
206
def _copy_inventory(self, rev_id, inv_xml, parent_ids):
207
self.to_control.add_text('inventory', rev_id,
208
split_lines(inv_xml), parent_ids,
209
self.to_branch.get_transaction())
211
def _copy_new_texts(self, rev_id, inv):
212
"""Copy any new texts occuring in this revision."""
213
# TODO: Rather than writing out weaves every time, hold them
214
# in memory until everything's done? But this way is nicer
215
# if it's interrupted.
216
for path, ie in inv.iter_entries():
217
self._copy_one_weave(rev_id, ie.file_id, ie.revision)
219
def _copy_one_weave(self, rev_id, file_id, text_revision):
220
"""Copy one file weave, esuring the result contains text_revision."""
221
# check if the revision is already there
222
if file_id in self.file_ids_names.keys( ) and \
223
text_revision in self.file_ids_names[file_id]:
225
to_weave = self.to_weaves.get_weave_or_empty(file_id,
226
self.to_branch.get_transaction())
227
if not file_id in self.file_ids_names.keys( ):
228
self.file_ids_names[file_id] = to_weave.names( )
229
if text_revision in to_weave:
231
from_weave = self.from_weaves.get_weave(file_id,
232
self.from_branch.get_transaction())
233
if text_revision not in from_weave:
234
raise MissingText(self.from_branch, text_revision, file_id)
235
mutter('copy file {%s} modified in {%s}', file_id, rev_id)
237
if to_weave.numversions() > 0:
238
# destination has contents, must merge
240
to_weave.join(from_weave)
241
except errors.WeaveParentMismatch:
242
to_weave.reweave(from_weave)
244
# destination is empty, just replace it
245
to_weave = from_weave.copy( )
246
self.to_weaves.put_weave(file_id, to_weave,
247
self.to_branch.get_transaction())
248
self.count_weaves += 1
249
self.copied_file_ids.add(file_id)
250
self.file_ids_names[file_id] = to_weave.names()
251
mutter('copied file {%s}', file_id)