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# Copyright (C) 2005, 2006, 2007, 2008, 2009 Canonical Ltd
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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from bzrlib.lazy_import import lazy_import
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lazy_import(globals(), """
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revision as _mod_revision,
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from bzrlib.bundle import serializer
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from bzrlib.revisiontree import RevisionTree
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from bzrlib.store.versioned import VersionedFileStore
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from bzrlib.testament import Testament
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from bzrlib.decorators import needs_read_lock, needs_write_lock
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from bzrlib.inter import InterObject
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from bzrlib.inventory import (
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from bzrlib import registry
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from bzrlib.symbol_versioning import (
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from bzrlib.trace import (
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log_exception_quietly, note, mutter, mutter_callsite, warning)
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# Old formats display a warning, but only once
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_deprecation_warning_done = False
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class CommitBuilder(object):
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"""Provides an interface to build up a commit.
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This allows describing a tree to be committed without needing to
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know the internals of the format of the repository.
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# all clients should supply tree roots.
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record_root_entry = True
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# the default CommitBuilder does not manage trees whose root is versioned.
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_versioned_root = False
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def __init__(self, repository, parents, config, timestamp=None,
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timezone=None, committer=None, revprops=None,
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"""Initiate a CommitBuilder.
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:param repository: Repository to commit to.
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:param parents: Revision ids of the parents of the new revision.
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:param config: Configuration to use.
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:param timestamp: Optional timestamp recorded for commit.
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:param timezone: Optional timezone for timestamp.
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:param committer: Optional committer to set for commit.
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:param revprops: Optional dictionary of revision properties.
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:param revision_id: Optional revision id.
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self._committer = self._config.username()
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self._committer = committer
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self.new_inventory = Inventory(None)
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self._new_revision_id = revision_id
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self.parents = parents
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self.repository = repository
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if revprops is not None:
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self._validate_revprops(revprops)
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self._revprops.update(revprops)
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if timestamp is None:
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timestamp = time.time()
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# Restrict resolution to 1ms
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self._timestamp = round(timestamp, 3)
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self._timezone = osutils.local_time_offset()
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self._timezone = int(timezone)
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self._generate_revision_if_needed()
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self.__heads = graph.HeadsCache(repository.get_graph()).heads
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self._basis_delta = []
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# API compatibility, older code that used CommitBuilder did not call
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# .record_delete(), which means the delta that is computed would not be
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# valid. Callers that will call record_delete() should call
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# .will_record_deletes() to indicate that.
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self._recording_deletes = False
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# memo'd check for no-op commits.
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self._any_changes = False
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def any_changes(self):
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"""Return True if any entries were changed.
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This includes merge-only changes. It is the core for the --unchanged
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:return: True if any changes have occured.
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return self._any_changes
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def _validate_unicode_text(self, text, context):
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"""Verify things like commit messages don't have bogus characters."""
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raise ValueError('Invalid value for %s: %r' % (context, text))
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def _validate_revprops(self, revprops):
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for key, value in revprops.iteritems():
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# We know that the XML serializers do not round trip '\r'
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# correctly, so refuse to accept them
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if not isinstance(value, basestring):
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raise ValueError('revision property (%s) is not a valid'
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' (unicode) string: %r' % (key, value))
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self._validate_unicode_text(value,
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'revision property (%s)' % (key,))
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def commit(self, message):
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"""Make the actual commit.
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:return: The revision id of the recorded revision.
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self._validate_unicode_text(message, 'commit message')
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rev = _mod_revision.Revision(
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timestamp=self._timestamp,
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timezone=self._timezone,
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committer=self._committer,
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inventory_sha1=self.inv_sha1,
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revision_id=self._new_revision_id,
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properties=self._revprops)
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rev.parent_ids = self.parents
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self.repository.add_revision(self._new_revision_id, rev,
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self.new_inventory, self._config)
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self.repository.commit_write_group()
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return self._new_revision_id
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"""Abort the commit that is being built.
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self.repository.abort_write_group()
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def revision_tree(self):
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"""Return the tree that was just committed.
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After calling commit() this can be called to get a RevisionTree
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representing the newly committed tree. This is preferred to
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calling Repository.revision_tree() because that may require
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deserializing the inventory, while we already have a copy in
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if self.new_inventory is None:
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self.new_inventory = self.repository.get_inventory(
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self._new_revision_id)
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return RevisionTree(self.repository, self.new_inventory,
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self._new_revision_id)
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def finish_inventory(self):
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"""Tell the builder that the inventory is finished.
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:return: The inventory id in the repository, which can be used with
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repository.get_inventory.
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if self.new_inventory is None:
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# an inventory delta was accumulated without creating a new
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basis_id = self.basis_delta_revision
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self.inv_sha1 = self.repository.add_inventory_by_delta(
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basis_id, self._basis_delta, self._new_revision_id,
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if self.new_inventory.root is None:
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raise AssertionError('Root entry should be supplied to'
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' record_entry_contents, as of bzr 0.10.')
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self.new_inventory.add(InventoryDirectory(ROOT_ID, '', None))
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self.new_inventory.revision_id = self._new_revision_id
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self.inv_sha1 = self.repository.add_inventory(
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self._new_revision_id,
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return self._new_revision_id
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def _gen_revision_id(self):
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"""Return new revision-id."""
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return generate_ids.gen_revision_id(self._config.username(),
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def _generate_revision_if_needed(self):
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"""Create a revision id if None was supplied.
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If the repository can not support user-specified revision ids
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they should override this function and raise CannotSetRevisionId
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if _new_revision_id is not None.
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:raises: CannotSetRevisionId
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if self._new_revision_id is None:
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self._new_revision_id = self._gen_revision_id()
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self.random_revid = True
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self.random_revid = False
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def _heads(self, file_id, revision_ids):
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"""Calculate the graph heads for revision_ids in the graph of file_id.
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This can use either a per-file graph or a global revision graph as we
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have an identity relationship between the two graphs.
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return self.__heads(revision_ids)
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def _check_root(self, ie, parent_invs, tree):
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"""Helper for record_entry_contents.
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:param ie: An entry being added.
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:param parent_invs: The inventories of the parent revisions of the
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:param tree: The tree that is being committed.
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# In this revision format, root entries have no knit or weave When
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# serializing out to disk and back in root.revision is always
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ie.revision = self._new_revision_id
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def _require_root_change(self, tree):
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"""Enforce an appropriate root object change.
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This is called once when record_iter_changes is called, if and only if
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the root was not in the delta calculated by record_iter_changes.
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:param tree: The tree which is being committed.
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# NB: if there are no parents then this method is not called, so no
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# need to guard on parents having length.
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entry = entry_factory['directory'](tree.path2id(''), '',
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entry.revision = self._new_revision_id
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self._basis_delta.append(('', '', entry.file_id, entry))
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def _get_delta(self, ie, basis_inv, path):
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"""Get a delta against the basis inventory for ie."""
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if ie.file_id not in basis_inv:
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result = (None, path, ie.file_id, ie)
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self._basis_delta.append(result)
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elif ie != basis_inv[ie.file_id]:
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# TODO: avoid tis id2path call.
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result = (basis_inv.id2path(ie.file_id), path, ie.file_id, ie)
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self._basis_delta.append(result)
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def get_basis_delta(self):
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"""Return the complete inventory delta versus the basis inventory.
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This has been built up with the calls to record_delete and
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record_entry_contents. The client must have already called
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will_record_deletes() to indicate that they will be generating a
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:return: An inventory delta, suitable for use with apply_delta, or
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Repository.add_inventory_by_delta, etc.
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if not self._recording_deletes:
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raise AssertionError("recording deletes not activated.")
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return self._basis_delta
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def record_delete(self, path, file_id):
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"""Record that a delete occured against a basis tree.
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This is an optional API - when used it adds items to the basis_delta
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being accumulated by the commit builder. It cannot be called unless the
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method will_record_deletes() has been called to inform the builder that
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a delta is being supplied.
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:param path: The path of the thing deleted.
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:param file_id: The file id that was deleted.
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if not self._recording_deletes:
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raise AssertionError("recording deletes not activated.")
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delta = (path, None, file_id, None)
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self._basis_delta.append(delta)
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self._any_changes = True
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def will_record_deletes(self):
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"""Tell the commit builder that deletes are being notified.
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This enables the accumulation of an inventory delta; for the resulting
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commit to be valid, deletes against the basis MUST be recorded via
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builder.record_delete().
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self._recording_deletes = True
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basis_id = self.parents[0]
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basis_id = _mod_revision.NULL_REVISION
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self.basis_delta_revision = basis_id
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def record_entry_contents(self, ie, parent_invs, path, tree,
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"""Record the content of ie from tree into the commit if needed.
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Side effect: sets ie.revision when unchanged
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:param ie: An inventory entry present in the commit.
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:param parent_invs: The inventories of the parent revisions of the
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:param path: The path the entry is at in the tree.
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:param tree: The tree which contains this entry and should be used to
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:param content_summary: Summary data from the tree about the paths
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content - stat, length, exec, sha/link target. This is only
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accessed when the entry has a revision of None - that is when it is
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a candidate to commit.
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:return: A tuple (change_delta, version_recorded, fs_hash).
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change_delta is an inventory_delta change for this entry against
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the basis tree of the commit, or None if no change occured against
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version_recorded is True if a new version of the entry has been
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recorded. For instance, committing a merge where a file was only
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changed on the other side will return (delta, False).
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fs_hash is either None, or the hash details for the path (currently
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a tuple of the contents sha1 and the statvalue returned by
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tree.get_file_with_stat()).
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if self.new_inventory.root is None:
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if ie.parent_id is not None:
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raise errors.RootMissing()
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self._check_root(ie, parent_invs, tree)
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if ie.revision is None:
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kind = content_summary[0]
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# ie is carried over from a prior commit
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# XXX: repository specific check for nested tree support goes here - if
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# the repo doesn't want nested trees we skip it ?
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if (kind == 'tree-reference' and
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not self.repository._format.supports_tree_reference):
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# mismatch between commit builder logic and repository:
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# this needs the entry creation pushed down into the builder.
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raise NotImplementedError('Missing repository subtree support.')
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self.new_inventory.add(ie)
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# TODO: slow, take it out of the inner loop.
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basis_inv = parent_invs[0]
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basis_inv = Inventory(root_id=None)
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# ie.revision is always None if the InventoryEntry is considered
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# for committing. We may record the previous parents revision if the
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# content is actually unchanged against a sole head.
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if ie.revision is not None:
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if not self._versioned_root and path == '':
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# repositories that do not version the root set the root's
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# revision to the new commit even when no change occurs (more
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# specifically, they do not record a revision on the root; and
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# the rev id is assigned to the root during deserialisation -
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# this masks when a change may have occurred against the basis.
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# To match this we always issue a delta, because the revision
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# of the root will always be changing.
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if ie.file_id in basis_inv:
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delta = (basis_inv.id2path(ie.file_id), path,
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delta = (None, path, ie.file_id, ie)
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self._basis_delta.append(delta)
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return delta, False, None
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# we don't need to commit this, because the caller already
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# determined that an existing revision of this file is
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# appropriate. If its not being considered for committing then
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# it and all its parents to the root must be unaltered so
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# no-change against the basis.
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if ie.revision == self._new_revision_id:
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raise AssertionError("Impossible situation, a skipped "
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"inventory entry (%r) claims to be modified in this "
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"commit (%r).", (ie, self._new_revision_id))
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return None, False, None
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# XXX: Friction: parent_candidates should return a list not a dict
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# so that we don't have to walk the inventories again.
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parent_candiate_entries = ie.parent_candidates(parent_invs)
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head_set = self._heads(ie.file_id, parent_candiate_entries.keys())
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for inv in parent_invs:
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if ie.file_id in inv:
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old_rev = inv[ie.file_id].revision
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if old_rev in head_set:
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heads.append(inv[ie.file_id].revision)
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head_set.remove(inv[ie.file_id].revision)
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# now we check to see if we need to write a new record to the
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# We write a new entry unless there is one head to the ancestors, and
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# the kind-derived content is unchanged.
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# Cheapest check first: no ancestors, or more the one head in the
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# ancestors, we write a new node.
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# There is a single head, look it up for comparison
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parent_entry = parent_candiate_entries[heads[0]]
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# if the non-content specific data has changed, we'll be writing a
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if (parent_entry.parent_id != ie.parent_id or
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parent_entry.name != ie.name):
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# now we need to do content specific checks:
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# if the kind changed the content obviously has
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if kind != parent_entry.kind:
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# Stat cache fingerprint feedback for the caller - None as we usually
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# don't generate one.
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if content_summary[2] is None:
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raise ValueError("Files must not have executable = None")
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if (# if the file length changed we have to store:
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parent_entry.text_size != content_summary[1] or
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# if the exec bit has changed we have to store:
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parent_entry.executable != content_summary[2]):
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elif parent_entry.text_sha1 == content_summary[3]:
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# all meta and content is unchanged (using a hash cache
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# hit to check the sha)
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ie.revision = parent_entry.revision
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ie.text_size = parent_entry.text_size
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ie.text_sha1 = parent_entry.text_sha1
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ie.executable = parent_entry.executable
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return self._get_delta(ie, basis_inv, path), False, None
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# Either there is only a hash change(no hash cache entry,
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# or same size content change), or there is no change on
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# Provide the parent's hash to the store layer, so that the
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# content is unchanged we will not store a new node.
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nostore_sha = parent_entry.text_sha1
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# We want to record a new node regardless of the presence or
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# absence of a content change in the file.
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ie.executable = content_summary[2]
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file_obj, stat_value = tree.get_file_with_stat(ie.file_id, path)
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lines = file_obj.readlines()
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ie.text_sha1, ie.text_size = self._add_text_to_weave(
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ie.file_id, lines, heads, nostore_sha)
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# Let the caller know we generated a stat fingerprint.
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fingerprint = (ie.text_sha1, stat_value)
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except errors.ExistingContent:
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# Turns out that the file content was unchanged, and we were
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# only going to store a new node if it was changed. Carry over
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ie.revision = parent_entry.revision
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ie.text_size = parent_entry.text_size
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ie.text_sha1 = parent_entry.text_sha1
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ie.executable = parent_entry.executable
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return self._get_delta(ie, basis_inv, path), False, None
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elif kind == 'directory':
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# all data is meta here, nothing specific to directory, so
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ie.revision = parent_entry.revision
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return self._get_delta(ie, basis_inv, path), False, None
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self._add_text_to_weave(ie.file_id, lines, heads, None)
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elif kind == 'symlink':
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current_link_target = content_summary[3]
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# symlink target is not generic metadata, check if it has
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if current_link_target != parent_entry.symlink_target:
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# unchanged, carry over.
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ie.revision = parent_entry.revision
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ie.symlink_target = parent_entry.symlink_target
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return self._get_delta(ie, basis_inv, path), False, None
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ie.symlink_target = current_link_target
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self._add_text_to_weave(ie.file_id, lines, heads, None)
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elif kind == 'tree-reference':
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if content_summary[3] != parent_entry.reference_revision:
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# unchanged, carry over.
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ie.reference_revision = parent_entry.reference_revision
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ie.revision = parent_entry.revision
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return self._get_delta(ie, basis_inv, path), False, None
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ie.reference_revision = content_summary[3]
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self._add_text_to_weave(ie.file_id, lines, heads, None)
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raise NotImplementedError('unknown kind')
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ie.revision = self._new_revision_id
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self._any_changes = True
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return self._get_delta(ie, basis_inv, path), True, fingerprint
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def record_iter_changes(self, tree, basis_revision_id, iter_changes,
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_entry_factory=entry_factory):
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"""Record a new tree via iter_changes.
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:param tree: The tree to obtain text contents from for changed objects.
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:param basis_revision_id: The revision id of the tree the iter_changes
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has been generated against. Currently assumed to be the same
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as self.parents[0] - if it is not, errors may occur.
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:param iter_changes: An iter_changes iterator with the changes to apply
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to basis_revision_id. The iterator must not include any items with
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a current kind of None - missing items must be either filtered out
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or errored-on beefore record_iter_changes sees the item.
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:param _entry_factory: Private method to bind entry_factory locally for
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:return: A generator of (file_id, relpath, fs_hash) tuples for use with
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# Create an inventory delta based on deltas between all the parents and
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# deltas between all the parent inventories. We use inventory delta's
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# between the inventory objects because iter_changes masks
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# last-changed-field only changes.
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# file_id -> change map, change is fileid, paths, changed, versioneds,
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# parents, names, kinds, executables
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# {file_id -> revision_id -> inventory entry, for entries in parent
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# trees that are not parents[0]
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revtrees = list(self.repository.revision_trees(self.parents))
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except errors.NoSuchRevision:
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# one or more ghosts, slow path.
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for revision_id in self.parents:
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revtrees.append(self.repository.revision_tree(revision_id))
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except errors.NoSuchRevision:
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basis_revision_id = _mod_revision.NULL_REVISION
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revtrees.append(self.repository.revision_tree(
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_mod_revision.NULL_REVISION))
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# The basis inventory from a repository
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basis_inv = revtrees[0].inventory
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basis_inv = self.repository.revision_tree(
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_mod_revision.NULL_REVISION).inventory
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if len(self.parents) > 0:
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if basis_revision_id != self.parents[0] and not ghost_basis:
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"arbitrary basis parents not yet supported with merges")
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for revtree in revtrees[1:]:
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for change in revtree.inventory._make_delta(basis_inv):
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if change[1] is None:
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# Not present in this parent.
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if change[2] not in merged_ids:
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if change[0] is not None:
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basis_entry = basis_inv[change[2]]
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merged_ids[change[2]] = [
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basis_entry.revision,
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parent_entries[change[2]] = {
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basis_entry.revision:basis_entry,
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change[3].revision:change[3],
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merged_ids[change[2]] = [change[3].revision]
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parent_entries[change[2]] = {change[3].revision:change[3]}
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merged_ids[change[2]].append(change[3].revision)
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parent_entries[change[2]][change[3].revision] = change[3]
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# Setup the changes from the tree:
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# changes maps file_id -> (change, [parent revision_ids])
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for change in iter_changes:
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# This probably looks up in basis_inv way to much.
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if change[1][0] is not None:
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head_candidate = [basis_inv[change[0]].revision]
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changes[change[0]] = change, merged_ids.get(change[0],
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unchanged_merged = set(merged_ids) - set(changes)
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# Extend the changes dict with synthetic changes to record merges of
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for file_id in unchanged_merged:
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# Record a merged version of these items that did not change vs the
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# basis. This can be either identical parallel changes, or a revert
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# of a specific file after a merge. The recorded content will be
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# that of the current tree (which is the same as the basis), but
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# the per-file graph will reflect a merge.
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# NB:XXX: We are reconstructing path information we had, this
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# should be preserved instead.
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# inv delta change: (file_id, (path_in_source, path_in_target),
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# changed_content, versioned, parent, name, kind,
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basis_entry = basis_inv[file_id]
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except errors.NoSuchId:
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# a change from basis->some_parents but file_id isn't in basis
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# so was new in the merge, which means it must have changed
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# from basis -> current, and as it hasn't the add was reverted
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# by the user. So we discard this change.
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(basis_inv.id2path(file_id), tree.id2path(file_id)),
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(basis_entry.parent_id, basis_entry.parent_id),
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(basis_entry.name, basis_entry.name),
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(basis_entry.kind, basis_entry.kind),
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(basis_entry.executable, basis_entry.executable))
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changes[file_id] = (change, merged_ids[file_id])
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# changes contains tuples with the change and a set of inventory
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# candidates for the file.
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# old_path, new_path, file_id, new_inventory_entry
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seen_root = False # Is the root in the basis delta?
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inv_delta = self._basis_delta
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modified_rev = self._new_revision_id
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for change, head_candidates in changes.values():
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if change[3][1]: # versioned in target.
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# Several things may be happening here:
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# We may have a fork in the per-file graph
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# - record a change with the content from tree
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# We may have a change against < all trees
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# - carry over the tree that hasn't changed
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# We may have a change against all trees
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# - record the change with the content from tree
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entry = _entry_factory[kind](file_id, change[5][1],
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head_set = self._heads(change[0], set(head_candidates))
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for head_candidate in head_candidates:
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if head_candidate in head_set:
702
heads.append(head_candidate)
703
head_set.remove(head_candidate)
706
# Could be a carry-over situation:
707
parent_entry_revs = parent_entries.get(file_id, None)
708
if parent_entry_revs:
709
parent_entry = parent_entry_revs.get(heads[0], None)
712
if parent_entry is None:
713
# The parent iter_changes was called against is the one
714
# that is the per-file head, so any change is relevant
715
# iter_changes is valid.
716
carry_over_possible = False
718
# could be a carry over situation
719
# A change against the basis may just indicate a merge,
720
# we need to check the content against the source of the
721
# merge to determine if it was changed after the merge
723
if (parent_entry.kind != entry.kind or
724
parent_entry.parent_id != entry.parent_id or
725
parent_entry.name != entry.name):
726
# Metadata common to all entries has changed
727
# against per-file parent
728
carry_over_possible = False
730
carry_over_possible = True
731
# per-type checks for changes against the parent_entry
734
# Cannot be a carry-over situation
735
carry_over_possible = False
736
# Populate the entry in the delta
738
# XXX: There is still a small race here: If someone reverts the content of a file
739
# after iter_changes examines and decides it has changed,
740
# we will unconditionally record a new version even if some
741
# other process reverts it while commit is running (with
742
# the revert happening after iter_changes did it's
745
entry.executable = True
747
entry.executable = False
748
if (carry_over_possible and
749
parent_entry.executable == entry.executable):
750
# Check the file length, content hash after reading
752
nostore_sha = parent_entry.text_sha1
755
file_obj, stat_value = tree.get_file_with_stat(file_id, change[1][1])
757
lines = file_obj.readlines()
761
entry.text_sha1, entry.text_size = self._add_text_to_weave(
762
file_id, lines, heads, nostore_sha)
763
yield file_id, change[1][1], (entry.text_sha1, stat_value)
764
except errors.ExistingContent:
765
# No content change against a carry_over parent
766
# Perhaps this should also yield a fs hash update?
768
entry.text_size = parent_entry.text_size
769
entry.text_sha1 = parent_entry.text_sha1
770
elif kind == 'symlink':
772
entry.symlink_target = tree.get_symlink_target(file_id)
773
if (carry_over_possible and
774
parent_entry.symlink_target == entry.symlink_target):
777
self._add_text_to_weave(change[0], [], heads, None)
778
elif kind == 'directory':
779
if carry_over_possible:
782
# Nothing to set on the entry.
783
# XXX: split into the Root and nonRoot versions.
784
if change[1][1] != '' or self.repository.supports_rich_root():
785
self._add_text_to_weave(change[0], [], heads, None)
786
elif kind == 'tree-reference':
787
if not self.repository._format.supports_tree_reference:
788
# This isn't quite sane as an error, but we shouldn't
789
# ever see this code path in practice: tree's don't
790
# permit references when the repo doesn't support tree
792
raise errors.UnsupportedOperation(tree.add_reference,
794
entry.reference_revision = \
795
tree.get_reference_revision(change[0])
796
if (carry_over_possible and
797
parent_entry.reference_revision == reference_revision):
800
self._add_text_to_weave(change[0], [], heads, None)
802
raise AssertionError('unknown kind %r' % kind)
804
entry.revision = modified_rev
806
entry.revision = parent_entry.revision
809
new_path = change[1][1]
810
inv_delta.append((change[1][0], new_path, change[0], entry))
813
self.new_inventory = None
815
self._any_changes = True
817
# housekeeping root entry changes do not affect no-change commits.
818
self._require_root_change(tree)
819
self.basis_delta_revision = basis_revision_id
821
def _add_text_to_weave(self, file_id, new_lines, parents, nostore_sha):
822
# Note: as we read the content directly from the tree, we know its not
823
# been turned into unicode or badly split - but a broken tree
824
# implementation could give us bad output from readlines() so this is
825
# not a guarantee of safety. What would be better is always checking
826
# the content during test suite execution. RBC 20070912
827
parent_keys = tuple((file_id, parent) for parent in parents)
828
return self.repository.texts.add_lines(
829
(file_id, self._new_revision_id), parent_keys, new_lines,
830
nostore_sha=nostore_sha, random_id=self.random_revid,
831
check_content=False)[0:2]
834
class RootCommitBuilder(CommitBuilder):
835
"""This commitbuilder actually records the root id"""
837
# the root entry gets versioned properly by this builder.
838
_versioned_root = True
840
def _check_root(self, ie, parent_invs, tree):
841
"""Helper for record_entry_contents.
843
:param ie: An entry being added.
844
:param parent_invs: The inventories of the parent revisions of the
846
:param tree: The tree that is being committed.
849
def _require_root_change(self, tree):
850
"""Enforce an appropriate root object change.
852
This is called once when record_iter_changes is called, if and only if
853
the root was not in the delta calculated by record_iter_changes.
855
:param tree: The tree which is being committed.
857
# versioned roots do not change unless the tree found a change.
860
######################################################################
863
class Repository(object):
864
"""Repository holding history for one or more branches.
866
The repository holds and retrieves historical information including
867
revisions and file history. It's normally accessed only by the Branch,
868
which views a particular line of development through that history.
870
The Repository builds on top of some byte storage facilies (the revisions,
871
signatures, inventories, texts and chk_bytes attributes) and a Transport,
872
which respectively provide byte storage and a means to access the (possibly
875
The byte storage facilities are addressed via tuples, which we refer to
876
as 'keys' throughout the code base. Revision_keys, inventory_keys and
877
signature_keys are all 1-tuples: (revision_id,). text_keys are two-tuples:
878
(file_id, revision_id). chk_bytes uses CHK keys - a 1-tuple with a single
879
byte string made up of a hash identifier and a hash value.
880
We use this interface because it allows low friction with the underlying
881
code that implements disk indices, network encoding and other parts of
884
:ivar revisions: A bzrlib.versionedfile.VersionedFiles instance containing
885
the serialised revisions for the repository. This can be used to obtain
886
revision graph information or to access raw serialised revisions.
887
The result of trying to insert data into the repository via this store
888
is undefined: it should be considered read-only except for implementors
890
:ivar signatures: A bzrlib.versionedfile.VersionedFiles instance containing
891
the serialised signatures for the repository. This can be used to
892
obtain access to raw serialised signatures. The result of trying to
893
insert data into the repository via this store is undefined: it should
894
be considered read-only except for implementors of repositories.
895
:ivar inventories: A bzrlib.versionedfile.VersionedFiles instance containing
896
the serialised inventories for the repository. This can be used to
897
obtain unserialised inventories. The result of trying to insert data
898
into the repository via this store is undefined: it should be
899
considered read-only except for implementors of repositories.
900
:ivar texts: A bzrlib.versionedfile.VersionedFiles instance containing the
901
texts of files and directories for the repository. This can be used to
902
obtain file texts or file graphs. Note that Repository.iter_file_bytes
903
is usually a better interface for accessing file texts.
904
The result of trying to insert data into the repository via this store
905
is undefined: it should be considered read-only except for implementors
907
:ivar chk_bytes: A bzrlib.versionedfile.VersionedFiles instance containing
908
any data the repository chooses to store or have indexed by its hash.
909
The result of trying to insert data into the repository via this store
910
is undefined: it should be considered read-only except for implementors
912
:ivar _transport: Transport for file access to repository, typically
913
pointing to .bzr/repository.
916
# What class to use for a CommitBuilder. Often its simpler to change this
917
# in a Repository class subclass rather than to override
918
# get_commit_builder.
919
_commit_builder_class = CommitBuilder
920
# The search regex used by xml based repositories to determine what things
921
# where changed in a single commit.
922
_file_ids_altered_regex = lazy_regex.lazy_compile(
923
r'file_id="(?P<file_id>[^"]+)"'
924
r'.* revision="(?P<revision_id>[^"]+)"'
927
def abort_write_group(self, suppress_errors=False):
928
"""Commit the contents accrued within the current write group.
930
:param suppress_errors: if true, abort_write_group will catch and log
931
unexpected errors that happen during the abort, rather than
932
allowing them to propagate. Defaults to False.
934
:seealso: start_write_group.
936
if self._write_group is not self.get_transaction():
937
# has an unlock or relock occured ?
938
raise errors.BzrError(
939
'mismatched lock context and write group. %r, %r' %
940
(self._write_group, self.get_transaction()))
942
self._abort_write_group()
943
except Exception, exc:
944
self._write_group = None
945
if not suppress_errors:
947
mutter('abort_write_group failed')
948
log_exception_quietly()
949
note('bzr: ERROR (ignored): %s', exc)
950
self._write_group = None
952
def _abort_write_group(self):
953
"""Template method for per-repository write group cleanup.
955
This is called during abort before the write group is considered to be
956
finished and should cleanup any internal state accrued during the write
957
group. There is no requirement that data handed to the repository be
958
*not* made available - this is not a rollback - but neither should any
959
attempt be made to ensure that data added is fully commited. Abort is
960
invoked when an error has occured so futher disk or network operations
961
may not be possible or may error and if possible should not be
965
def add_fallback_repository(self, repository):
966
"""Add a repository to use for looking up data not held locally.
968
:param repository: A repository.
970
if not self._format.supports_external_lookups:
971
raise errors.UnstackableRepositoryFormat(self._format, self.base)
972
self._check_fallback_repository(repository)
973
self._fallback_repositories.append(repository)
974
self.texts.add_fallback_versioned_files(repository.texts)
975
self.inventories.add_fallback_versioned_files(repository.inventories)
976
self.revisions.add_fallback_versioned_files(repository.revisions)
977
self.signatures.add_fallback_versioned_files(repository.signatures)
978
if self.chk_bytes is not None:
979
self.chk_bytes.add_fallback_versioned_files(repository.chk_bytes)
981
def _check_fallback_repository(self, repository):
982
"""Check that this repository can fallback to repository safely.
984
Raise an error if not.
986
:param repository: A repository to fallback to.
988
return InterRepository._assert_same_model(self, repository)
990
def add_inventory(self, revision_id, inv, parents):
991
"""Add the inventory inv to the repository as revision_id.
993
:param parents: The revision ids of the parents that revision_id
994
is known to have and are in the repository already.
996
:returns: The validator(which is a sha1 digest, though what is sha'd is
997
repository format specific) of the serialized inventory.
999
if not self.is_in_write_group():
1000
raise AssertionError("%r not in write group" % (self,))
1001
_mod_revision.check_not_reserved_id(revision_id)
1002
if not (inv.revision_id is None or inv.revision_id == revision_id):
1003
raise AssertionError(
1004
"Mismatch between inventory revision"
1005
" id and insertion revid (%r, %r)"
1006
% (inv.revision_id, revision_id))
1007
if inv.root is None:
1008
raise AssertionError()
1009
return self._add_inventory_checked(revision_id, inv, parents)
1011
def _add_inventory_checked(self, revision_id, inv, parents):
1012
"""Add inv to the repository after checking the inputs.
1014
This function can be overridden to allow different inventory styles.
1016
:seealso: add_inventory, for the contract.
1018
inv_lines = self._serialise_inventory_to_lines(inv)
1019
return self._inventory_add_lines(revision_id, parents,
1020
inv_lines, check_content=False)
1022
def add_inventory_by_delta(self, basis_revision_id, delta, new_revision_id,
1023
parents, basis_inv=None, propagate_caches=False):
1024
"""Add a new inventory expressed as a delta against another revision.
1026
:param basis_revision_id: The inventory id the delta was created
1027
against. (This does not have to be a direct parent.)
1028
:param delta: The inventory delta (see Inventory.apply_delta for
1030
:param new_revision_id: The revision id that the inventory is being
1032
:param parents: The revision ids of the parents that revision_id is
1033
known to have and are in the repository already. These are supplied
1034
for repositories that depend on the inventory graph for revision
1035
graph access, as well as for those that pun ancestry with delta
1037
:param basis_inv: The basis inventory if it is already known,
1039
:param propagate_caches: If True, the caches for this inventory are
1040
copied to and updated for the result if possible.
1042
:returns: (validator, new_inv)
1043
The validator(which is a sha1 digest, though what is sha'd is
1044
repository format specific) of the serialized inventory, and the
1045
resulting inventory.
1047
if not self.is_in_write_group():
1048
raise AssertionError("%r not in write group" % (self,))
1049
_mod_revision.check_not_reserved_id(new_revision_id)
1050
basis_tree = self.revision_tree(basis_revision_id)
1051
basis_tree.lock_read()
1053
# Note that this mutates the inventory of basis_tree, which not all
1054
# inventory implementations may support: A better idiom would be to
1055
# return a new inventory, but as there is no revision tree cache in
1056
# repository this is safe for now - RBC 20081013
1057
if basis_inv is None:
1058
basis_inv = basis_tree.inventory
1059
basis_inv.apply_delta(delta)
1060
basis_inv.revision_id = new_revision_id
1061
return (self.add_inventory(new_revision_id, basis_inv, parents),
1066
def _inventory_add_lines(self, revision_id, parents, lines,
1067
check_content=True):
1068
"""Store lines in inv_vf and return the sha1 of the inventory."""
1069
parents = [(parent,) for parent in parents]
1070
return self.inventories.add_lines((revision_id,), parents, lines,
1071
check_content=check_content)[0]
1073
def add_revision(self, revision_id, rev, inv=None, config=None):
1074
"""Add rev to the revision store as revision_id.
1076
:param revision_id: the revision id to use.
1077
:param rev: The revision object.
1078
:param inv: The inventory for the revision. if None, it will be looked
1079
up in the inventory storer
1080
:param config: If None no digital signature will be created.
1081
If supplied its signature_needed method will be used
1082
to determine if a signature should be made.
1084
# TODO: jam 20070210 Shouldn't we check rev.revision_id and
1086
_mod_revision.check_not_reserved_id(revision_id)
1087
if config is not None and config.signature_needed():
1089
inv = self.get_inventory(revision_id)
1090
plaintext = Testament(rev, inv).as_short_text()
1091
self.store_revision_signature(
1092
gpg.GPGStrategy(config), plaintext, revision_id)
1093
# check inventory present
1094
if not self.inventories.get_parent_map([(revision_id,)]):
1096
raise errors.WeaveRevisionNotPresent(revision_id,
1099
# yes, this is not suitable for adding with ghosts.
1100
rev.inventory_sha1 = self.add_inventory(revision_id, inv,
1103
key = (revision_id,)
1104
rev.inventory_sha1 = self.inventories.get_sha1s([key])[key]
1105
self._add_revision(rev)
1107
def _add_revision(self, revision):
1108
text = self._serializer.write_revision_to_string(revision)
1109
key = (revision.revision_id,)
1110
parents = tuple((parent,) for parent in revision.parent_ids)
1111
self.revisions.add_lines(key, parents, osutils.split_lines(text))
1113
def all_revision_ids(self):
1114
"""Returns a list of all the revision ids in the repository.
1116
This is conceptually deprecated because code should generally work on
1117
the graph reachable from a particular revision, and ignore any other
1118
revisions that might be present. There is no direct replacement
1121
if 'evil' in debug.debug_flags:
1122
mutter_callsite(2, "all_revision_ids is linear with history.")
1123
return self._all_revision_ids()
1125
def _all_revision_ids(self):
1126
"""Returns a list of all the revision ids in the repository.
1128
These are in as much topological order as the underlying store can
1131
raise NotImplementedError(self._all_revision_ids)
1133
def break_lock(self):
1134
"""Break a lock if one is present from another instance.
1136
Uses the ui factory to ask for confirmation if the lock may be from
1139
self.control_files.break_lock()
1142
def _eliminate_revisions_not_present(self, revision_ids):
1143
"""Check every revision id in revision_ids to see if we have it.
1145
Returns a set of the present revisions.
1148
graph = self.get_graph()
1149
parent_map = graph.get_parent_map(revision_ids)
1150
# The old API returned a list, should this actually be a set?
1151
return parent_map.keys()
1154
def create(a_bzrdir):
1155
"""Construct the current default format repository in a_bzrdir."""
1156
return RepositoryFormat.get_default_format().initialize(a_bzrdir)
1158
def __init__(self, _format, a_bzrdir, control_files):
1159
"""instantiate a Repository.
1161
:param _format: The format of the repository on disk.
1162
:param a_bzrdir: The BzrDir of the repository.
1164
In the future we will have a single api for all stores for
1165
getting file texts, inventories and revisions, then
1166
this construct will accept instances of those things.
1168
super(Repository, self).__init__()
1169
self._format = _format
1170
# the following are part of the public API for Repository:
1171
self.bzrdir = a_bzrdir
1172
self.control_files = control_files
1173
self._transport = control_files._transport
1174
self.base = self._transport.base
1176
self._reconcile_does_inventory_gc = True
1177
self._reconcile_fixes_text_parents = False
1178
self._reconcile_backsup_inventory = True
1179
# not right yet - should be more semantically clear ?
1181
# TODO: make sure to construct the right store classes, etc, depending
1182
# on whether escaping is required.
1183
self._warn_if_deprecated()
1184
self._write_group = None
1185
# Additional places to query for data.
1186
self._fallback_repositories = []
1187
# An InventoryEntry cache, used during deserialization
1188
self._inventory_entry_cache = fifo_cache.FIFOCache(10*1024)
1191
return '%s(%r)' % (self.__class__.__name__,
1194
def has_same_location(self, other):
1195
"""Returns a boolean indicating if this repository is at the same
1196
location as another repository.
1198
This might return False even when two repository objects are accessing
1199
the same physical repository via different URLs.
1201
if self.__class__ is not other.__class__:
1203
return (self._transport.base == other._transport.base)
1205
def is_in_write_group(self):
1206
"""Return True if there is an open write group.
1208
:seealso: start_write_group.
1210
return self._write_group is not None
1212
def is_locked(self):
1213
return self.control_files.is_locked()
1215
def is_write_locked(self):
1216
"""Return True if this object is write locked."""
1217
return self.is_locked() and self.control_files._lock_mode == 'w'
1219
def lock_write(self, token=None):
1220
"""Lock this repository for writing.
1222
This causes caching within the repository obejct to start accumlating
1223
data during reads, and allows a 'write_group' to be obtained. Write
1224
groups must be used for actual data insertion.
1226
:param token: if this is already locked, then lock_write will fail
1227
unless the token matches the existing lock.
1228
:returns: a token if this instance supports tokens, otherwise None.
1229
:raises TokenLockingNotSupported: when a token is given but this
1230
instance doesn't support using token locks.
1231
:raises MismatchedToken: if the specified token doesn't match the token
1232
of the existing lock.
1233
:seealso: start_write_group.
1235
A token should be passed in if you know that you have locked the object
1236
some other way, and need to synchronise this object's state with that
1239
XXX: this docstring is duplicated in many places, e.g. lockable_files.py
1241
locked = self.is_locked()
1242
result = self.control_files.lock_write(token=token)
1243
for repo in self._fallback_repositories:
1244
# Writes don't affect fallback repos
1247
self._refresh_data()
1250
def lock_read(self):
1251
locked = self.is_locked()
1252
self.control_files.lock_read()
1253
for repo in self._fallback_repositories:
1256
self._refresh_data()
1258
def get_physical_lock_status(self):
1259
return self.control_files.get_physical_lock_status()
1261
def leave_lock_in_place(self):
1262
"""Tell this repository not to release the physical lock when this
1265
If lock_write doesn't return a token, then this method is not supported.
1267
self.control_files.leave_in_place()
1269
def dont_leave_lock_in_place(self):
1270
"""Tell this repository to release the physical lock when this
1271
object is unlocked, even if it didn't originally acquire it.
1273
If lock_write doesn't return a token, then this method is not supported.
1275
self.control_files.dont_leave_in_place()
1278
def gather_stats(self, revid=None, committers=None):
1279
"""Gather statistics from a revision id.
1281
:param revid: The revision id to gather statistics from, if None, then
1282
no revision specific statistics are gathered.
1283
:param committers: Optional parameter controlling whether to grab
1284
a count of committers from the revision specific statistics.
1285
:return: A dictionary of statistics. Currently this contains:
1286
committers: The number of committers if requested.
1287
firstrev: A tuple with timestamp, timezone for the penultimate left
1288
most ancestor of revid, if revid is not the NULL_REVISION.
1289
latestrev: A tuple with timestamp, timezone for revid, if revid is
1290
not the NULL_REVISION.
1291
revisions: The total revision count in the repository.
1292
size: An estimate disk size of the repository in bytes.
1295
if revid and committers:
1296
result['committers'] = 0
1297
if revid and revid != _mod_revision.NULL_REVISION:
1299
all_committers = set()
1300
revisions = self.get_ancestry(revid)
1301
# pop the leading None
1303
first_revision = None
1305
# ignore the revisions in the middle - just grab first and last
1306
revisions = revisions[0], revisions[-1]
1307
for revision in self.get_revisions(revisions):
1308
if not first_revision:
1309
first_revision = revision
1311
all_committers.add(revision.committer)
1312
last_revision = revision
1314
result['committers'] = len(all_committers)
1315
result['firstrev'] = (first_revision.timestamp,
1316
first_revision.timezone)
1317
result['latestrev'] = (last_revision.timestamp,
1318
last_revision.timezone)
1320
# now gather global repository information
1321
# XXX: This is available for many repos regardless of listability.
1322
if self.bzrdir.root_transport.listable():
1323
# XXX: do we want to __define len__() ?
1324
# Maybe the versionedfiles object should provide a different
1325
# method to get the number of keys.
1326
result['revisions'] = len(self.revisions.keys())
1327
# result['size'] = t
1330
def find_branches(self, using=False):
1331
"""Find branches underneath this repository.
1333
This will include branches inside other branches.
1335
:param using: If True, list only branches using this repository.
1337
if using and not self.is_shared():
1339
return [self.bzrdir.open_branch()]
1340
except errors.NotBranchError:
1342
class Evaluator(object):
1345
self.first_call = True
1347
def __call__(self, bzrdir):
1348
# On the first call, the parameter is always the bzrdir
1349
# containing the current repo.
1350
if not self.first_call:
1352
repository = bzrdir.open_repository()
1353
except errors.NoRepositoryPresent:
1356
return False, (None, repository)
1357
self.first_call = False
1359
value = (bzrdir.open_branch(), None)
1360
except errors.NotBranchError:
1361
value = (None, None)
1365
for branch, repository in bzrdir.BzrDir.find_bzrdirs(
1366
self.bzrdir.root_transport, evaluate=Evaluator()):
1367
if branch is not None:
1368
branches.append(branch)
1369
if not using and repository is not None:
1370
branches.extend(repository.find_branches())
1374
def search_missing_revision_ids(self, other, revision_id=None, find_ghosts=True):
1375
"""Return the revision ids that other has that this does not.
1377
These are returned in topological order.
1379
revision_id: only return revision ids included by revision_id.
1381
return InterRepository.get(other, self).search_missing_revision_ids(
1382
revision_id, find_ghosts)
1386
"""Open the repository rooted at base.
1388
For instance, if the repository is at URL/.bzr/repository,
1389
Repository.open(URL) -> a Repository instance.
1391
control = bzrdir.BzrDir.open(base)
1392
return control.open_repository()
1394
def copy_content_into(self, destination, revision_id=None):
1395
"""Make a complete copy of the content in self into destination.
1397
This is a destructive operation! Do not use it on existing
1400
return InterRepository.get(self, destination).copy_content(revision_id)
1402
def commit_write_group(self):
1403
"""Commit the contents accrued within the current write group.
1405
:seealso: start_write_group.
1407
if self._write_group is not self.get_transaction():
1408
# has an unlock or relock occured ?
1409
raise errors.BzrError('mismatched lock context %r and '
1411
(self.get_transaction(), self._write_group))
1412
self._commit_write_group()
1413
self._write_group = None
1415
def _commit_write_group(self):
1416
"""Template method for per-repository write group cleanup.
1418
This is called before the write group is considered to be
1419
finished and should ensure that all data handed to the repository
1420
for writing during the write group is safely committed (to the
1421
extent possible considering file system caching etc).
1424
def suspend_write_group(self):
1425
raise errors.UnsuspendableWriteGroup(self)
1427
def get_missing_parent_inventories(self):
1428
"""Return the keys of missing inventory parents for revisions added in
1431
A revision is not complete if the inventory delta for that revision
1432
cannot be calculated. Therefore if the parent inventories of a
1433
revision are not present, the revision is incomplete, and e.g. cannot
1434
be streamed by a smart server. This method finds missing inventory
1435
parents for revisions added in this write group.
1437
if not self._format.supports_external_lookups:
1438
# This is only an issue for stacked repositories
1440
if not self.is_in_write_group():
1441
raise AssertionError('not in a write group')
1443
# XXX: We assume that every added revision already has its
1444
# corresponding inventory, so we only check for parent inventories that
1445
# might be missing, rather than all inventories.
1446
parents = set(self.revisions._index.get_missing_parents())
1447
parents.discard(_mod_revision.NULL_REVISION)
1448
unstacked_inventories = self.inventories._index
1449
present_inventories = unstacked_inventories.get_parent_map(
1450
key[-1:] for key in parents)
1451
if len(parents.difference(present_inventories)) == 0:
1452
# No missing parent inventories.
1454
# Ok, now we have a list of missing inventories. But these only matter
1455
# if the inventories that reference them are missing some texts they
1456
# appear to introduce.
1457
# XXX: Texts referenced by all added inventories need to be present,
1458
# but at the moment we're only checking for texts referenced by
1459
# inventories at the graph's edge.
1460
key_deps = self.revisions._index._key_dependencies
1461
key_deps.add_keys(present_inventories)
1462
referrers = frozenset(r[0] for r in key_deps.get_referrers())
1463
file_ids = self.fileids_altered_by_revision_ids(referrers)
1464
missing_texts = set()
1465
for file_id, version_ids in file_ids.iteritems():
1466
missing_texts.update(
1467
(file_id, version_id) for version_id in version_ids)
1468
present_texts = self.texts.get_parent_map(missing_texts)
1469
missing_texts.difference_update(present_texts)
1470
if not missing_texts:
1471
# No texts are missing, so all revisions and their deltas are
1474
# Alternatively the text versions could be returned as the missing
1475
# keys, but this is likely to be less data.
1476
missing_keys = set(('inventories', rev_id) for (rev_id,) in parents)
1479
def refresh_data(self):
1480
"""Re-read any data needed to to synchronise with disk.
1482
This method is intended to be called after another repository instance
1483
(such as one used by a smart server) has inserted data into the
1484
repository. It may not be called during a write group, but may be
1485
called at any other time.
1487
if self.is_in_write_group():
1488
raise errors.InternalBzrError(
1489
"May not refresh_data while in a write group.")
1490
self._refresh_data()
1492
def resume_write_group(self, tokens):
1493
if not self.is_write_locked():
1494
raise errors.NotWriteLocked(self)
1495
if self._write_group:
1496
raise errors.BzrError('already in a write group')
1497
self._resume_write_group(tokens)
1498
# so we can detect unlock/relock - the write group is now entered.
1499
self._write_group = self.get_transaction()
1501
def _resume_write_group(self, tokens):
1502
raise errors.UnsuspendableWriteGroup(self)
1504
def fetch(self, source, revision_id=None, pb=None, find_ghosts=False,
1506
"""Fetch the content required to construct revision_id from source.
1508
If revision_id is None and fetch_spec is None, then all content is
1511
fetch() may not be used when the repository is in a write group -
1512
either finish the current write group before using fetch, or use
1513
fetch before starting the write group.
1515
:param find_ghosts: Find and copy revisions in the source that are
1516
ghosts in the target (and not reachable directly by walking out to
1517
the first-present revision in target from revision_id).
1518
:param revision_id: If specified, all the content needed for this
1519
revision ID will be copied to the target. Fetch will determine for
1520
itself which content needs to be copied.
1521
:param fetch_spec: If specified, a SearchResult or
1522
PendingAncestryResult that describes which revisions to copy. This
1523
allows copying multiple heads at once. Mutually exclusive with
1526
if fetch_spec is not None and revision_id is not None:
1527
raise AssertionError(
1528
"fetch_spec and revision_id are mutually exclusive.")
1529
if self.is_in_write_group():
1530
raise errors.InternalBzrError(
1531
"May not fetch while in a write group.")
1532
# fast path same-url fetch operations
1533
if self.has_same_location(source) and fetch_spec is None:
1534
# check that last_revision is in 'from' and then return a
1536
if (revision_id is not None and
1537
not _mod_revision.is_null(revision_id)):
1538
self.get_revision(revision_id)
1540
# if there is no specific appropriate InterRepository, this will get
1541
# the InterRepository base class, which raises an
1542
# IncompatibleRepositories when asked to fetch.
1543
inter = InterRepository.get(source, self)
1544
return inter.fetch(revision_id=revision_id, pb=pb,
1545
find_ghosts=find_ghosts, fetch_spec=fetch_spec)
1547
def create_bundle(self, target, base, fileobj, format=None):
1548
return serializer.write_bundle(self, target, base, fileobj, format)
1550
def get_commit_builder(self, branch, parents, config, timestamp=None,
1551
timezone=None, committer=None, revprops=None,
1553
"""Obtain a CommitBuilder for this repository.
1555
:param branch: Branch to commit to.
1556
:param parents: Revision ids of the parents of the new revision.
1557
:param config: Configuration to use.
1558
:param timestamp: Optional timestamp recorded for commit.
1559
:param timezone: Optional timezone for timestamp.
1560
:param committer: Optional committer to set for commit.
1561
:param revprops: Optional dictionary of revision properties.
1562
:param revision_id: Optional revision id.
1564
result = self._commit_builder_class(self, parents, config,
1565
timestamp, timezone, committer, revprops, revision_id)
1566
self.start_write_group()
1570
if (self.control_files._lock_count == 1 and
1571
self.control_files._lock_mode == 'w'):
1572
if self._write_group is not None:
1573
self.abort_write_group()
1574
self.control_files.unlock()
1575
raise errors.BzrError(
1576
'Must end write groups before releasing write locks.')
1577
self.control_files.unlock()
1578
if self.control_files._lock_count == 0:
1579
self._inventory_entry_cache.clear()
1580
for repo in self._fallback_repositories:
1584
def clone(self, a_bzrdir, revision_id=None):
1585
"""Clone this repository into a_bzrdir using the current format.
1587
Currently no check is made that the format of this repository and
1588
the bzrdir format are compatible. FIXME RBC 20060201.
1590
:return: The newly created destination repository.
1592
# TODO: deprecate after 0.16; cloning this with all its settings is
1593
# probably not very useful -- mbp 20070423
1594
dest_repo = self._create_sprouting_repo(a_bzrdir, shared=self.is_shared())
1595
self.copy_content_into(dest_repo, revision_id)
1598
def start_write_group(self):
1599
"""Start a write group in the repository.
1601
Write groups are used by repositories which do not have a 1:1 mapping
1602
between file ids and backend store to manage the insertion of data from
1603
both fetch and commit operations.
1605
A write lock is required around the start_write_group/commit_write_group
1606
for the support of lock-requiring repository formats.
1608
One can only insert data into a repository inside a write group.
1612
if not self.is_write_locked():
1613
raise errors.NotWriteLocked(self)
1614
if self._write_group:
1615
raise errors.BzrError('already in a write group')
1616
self._start_write_group()
1617
# so we can detect unlock/relock - the write group is now entered.
1618
self._write_group = self.get_transaction()
1620
def _start_write_group(self):
1621
"""Template method for per-repository write group startup.
1623
This is called before the write group is considered to be
1628
def sprout(self, to_bzrdir, revision_id=None):
1629
"""Create a descendent repository for new development.
1631
Unlike clone, this does not copy the settings of the repository.
1633
dest_repo = self._create_sprouting_repo(to_bzrdir, shared=False)
1634
dest_repo.fetch(self, revision_id=revision_id)
1637
def _create_sprouting_repo(self, a_bzrdir, shared):
1638
if not isinstance(a_bzrdir._format, self.bzrdir._format.__class__):
1639
# use target default format.
1640
dest_repo = a_bzrdir.create_repository()
1642
# Most control formats need the repository to be specifically
1643
# created, but on some old all-in-one formats it's not needed
1645
dest_repo = self._format.initialize(a_bzrdir, shared=shared)
1646
except errors.UninitializableFormat:
1647
dest_repo = a_bzrdir.open_repository()
1650
def _get_sink(self):
1651
"""Return a sink for streaming into this repository."""
1652
return StreamSink(self)
1654
def _get_source(self, to_format):
1655
"""Return a source for streaming from this repository."""
1656
return StreamSource(self, to_format)
1659
def has_revision(self, revision_id):
1660
"""True if this repository has a copy of the revision."""
1661
return revision_id in self.has_revisions((revision_id,))
1664
def has_revisions(self, revision_ids):
1665
"""Probe to find out the presence of multiple revisions.
1667
:param revision_ids: An iterable of revision_ids.
1668
:return: A set of the revision_ids that were present.
1670
parent_map = self.revisions.get_parent_map(
1671
[(rev_id,) for rev_id in revision_ids])
1673
if _mod_revision.NULL_REVISION in revision_ids:
1674
result.add(_mod_revision.NULL_REVISION)
1675
result.update([key[0] for key in parent_map])
1679
def get_revision(self, revision_id):
1680
"""Return the Revision object for a named revision."""
1681
return self.get_revisions([revision_id])[0]
1684
def get_revision_reconcile(self, revision_id):
1685
"""'reconcile' helper routine that allows access to a revision always.
1687
This variant of get_revision does not cross check the weave graph
1688
against the revision one as get_revision does: but it should only
1689
be used by reconcile, or reconcile-alike commands that are correcting
1690
or testing the revision graph.
1692
return self._get_revisions([revision_id])[0]
1695
def get_revisions(self, revision_ids):
1696
"""Get many revisions at once."""
1697
return self._get_revisions(revision_ids)
1700
def _get_revisions(self, revision_ids):
1701
"""Core work logic to get many revisions without sanity checks."""
1702
for rev_id in revision_ids:
1703
if not rev_id or not isinstance(rev_id, basestring):
1704
raise errors.InvalidRevisionId(revision_id=rev_id, branch=self)
1705
keys = [(key,) for key in revision_ids]
1706
stream = self.revisions.get_record_stream(keys, 'unordered', True)
1708
for record in stream:
1709
if record.storage_kind == 'absent':
1710
raise errors.NoSuchRevision(self, record.key[0])
1711
text = record.get_bytes_as('fulltext')
1712
rev = self._serializer.read_revision_from_string(text)
1713
revs[record.key[0]] = rev
1714
return [revs[revid] for revid in revision_ids]
1717
def get_revision_xml(self, revision_id):
1718
# TODO: jam 20070210 This shouldn't be necessary since get_revision
1719
# would have already do it.
1720
# TODO: jam 20070210 Just use _serializer.write_revision_to_string()
1721
# TODO: this can't just be replaced by:
1722
# return self._serializer.write_revision_to_string(
1723
# self.get_revision(revision_id))
1724
# as cStringIO preservers the encoding unlike write_revision_to_string
1725
# or some other call down the path.
1726
rev = self.get_revision(revision_id)
1727
rev_tmp = cStringIO.StringIO()
1728
# the current serializer..
1729
self._serializer.write_revision(rev, rev_tmp)
1731
return rev_tmp.getvalue()
1733
def get_deltas_for_revisions(self, revisions, specific_fileids=None):
1734
"""Produce a generator of revision deltas.
1736
Note that the input is a sequence of REVISIONS, not revision_ids.
1737
Trees will be held in memory until the generator exits.
1738
Each delta is relative to the revision's lefthand predecessor.
1740
:param specific_fileids: if not None, the result is filtered
1741
so that only those file-ids, their parents and their
1742
children are included.
1744
# Get the revision-ids of interest
1745
required_trees = set()
1746
for revision in revisions:
1747
required_trees.add(revision.revision_id)
1748
required_trees.update(revision.parent_ids[:1])
1750
# Get the matching filtered trees. Note that it's more
1751
# efficient to pass filtered trees to changes_from() rather
1752
# than doing the filtering afterwards. changes_from() could
1753
# arguably do the filtering itself but it's path-based, not
1754
# file-id based, so filtering before or afterwards is
1756
if specific_fileids is None:
1757
trees = dict((t.get_revision_id(), t) for
1758
t in self.revision_trees(required_trees))
1760
trees = dict((t.get_revision_id(), t) for
1761
t in self._filtered_revision_trees(required_trees,
1764
# Calculate the deltas
1765
for revision in revisions:
1766
if not revision.parent_ids:
1767
old_tree = self.revision_tree(_mod_revision.NULL_REVISION)
1769
old_tree = trees[revision.parent_ids[0]]
1770
yield trees[revision.revision_id].changes_from(old_tree)
1773
def get_revision_delta(self, revision_id, specific_fileids=None):
1774
"""Return the delta for one revision.
1776
The delta is relative to the left-hand predecessor of the
1779
:param specific_fileids: if not None, the result is filtered
1780
so that only those file-ids, their parents and their
1781
children are included.
1783
r = self.get_revision(revision_id)
1784
return list(self.get_deltas_for_revisions([r],
1785
specific_fileids=specific_fileids))[0]
1788
def store_revision_signature(self, gpg_strategy, plaintext, revision_id):
1789
signature = gpg_strategy.sign(plaintext)
1790
self.add_signature_text(revision_id, signature)
1793
def add_signature_text(self, revision_id, signature):
1794
self.signatures.add_lines((revision_id,), (),
1795
osutils.split_lines(signature))
1797
def find_text_key_references(self):
1798
"""Find the text key references within the repository.
1800
:return: A dictionary mapping text keys ((fileid, revision_id) tuples)
1801
to whether they were referred to by the inventory of the
1802
revision_id that they contain. The inventory texts from all present
1803
revision ids are assessed to generate this report.
1805
revision_keys = self.revisions.keys()
1806
w = self.inventories
1807
pb = ui.ui_factory.nested_progress_bar()
1809
return self._find_text_key_references_from_xml_inventory_lines(
1810
w.iter_lines_added_or_present_in_keys(revision_keys, pb=pb))
1814
def _find_text_key_references_from_xml_inventory_lines(self,
1816
"""Core routine for extracting references to texts from inventories.
1818
This performs the translation of xml lines to revision ids.
1820
:param line_iterator: An iterator of lines, origin_version_id
1821
:return: A dictionary mapping text keys ((fileid, revision_id) tuples)
1822
to whether they were referred to by the inventory of the
1823
revision_id that they contain. Note that if that revision_id was
1824
not part of the line_iterator's output then False will be given -
1825
even though it may actually refer to that key.
1827
if not self._serializer.support_altered_by_hack:
1828
raise AssertionError(
1829
"_find_text_key_references_from_xml_inventory_lines only "
1830
"supported for branches which store inventory as unnested xml"
1831
", not on %r" % self)
1834
# this code needs to read every new line in every inventory for the
1835
# inventories [revision_ids]. Seeing a line twice is ok. Seeing a line
1836
# not present in one of those inventories is unnecessary but not
1837
# harmful because we are filtering by the revision id marker in the
1838
# inventory lines : we only select file ids altered in one of those
1839
# revisions. We don't need to see all lines in the inventory because
1840
# only those added in an inventory in rev X can contain a revision=X
1842
unescape_revid_cache = {}
1843
unescape_fileid_cache = {}
1845
# jam 20061218 In a big fetch, this handles hundreds of thousands
1846
# of lines, so it has had a lot of inlining and optimizing done.
1847
# Sorry that it is a little bit messy.
1848
# Move several functions to be local variables, since this is a long
1850
search = self._file_ids_altered_regex.search
1851
unescape = _unescape_xml
1852
setdefault = result.setdefault
1853
for line, line_key in line_iterator:
1854
match = search(line)
1857
# One call to match.group() returning multiple items is quite a
1858
# bit faster than 2 calls to match.group() each returning 1
1859
file_id, revision_id = match.group('file_id', 'revision_id')
1861
# Inlining the cache lookups helps a lot when you make 170,000
1862
# lines and 350k ids, versus 8.4 unique ids.
1863
# Using a cache helps in 2 ways:
1864
# 1) Avoids unnecessary decoding calls
1865
# 2) Re-uses cached strings, which helps in future set and
1867
# (2) is enough that removing encoding entirely along with
1868
# the cache (so we are using plain strings) results in no
1869
# performance improvement.
1871
revision_id = unescape_revid_cache[revision_id]
1873
unescaped = unescape(revision_id)
1874
unescape_revid_cache[revision_id] = unescaped
1875
revision_id = unescaped
1877
# Note that unconditionally unescaping means that we deserialise
1878
# every fileid, which for general 'pull' is not great, but we don't
1879
# really want to have some many fulltexts that this matters anyway.
1882
file_id = unescape_fileid_cache[file_id]
1884
unescaped = unescape(file_id)
1885
unescape_fileid_cache[file_id] = unescaped
1888
key = (file_id, revision_id)
1889
setdefault(key, False)
1890
if revision_id == line_key[-1]:
1894
def _inventory_xml_lines_for_keys(self, keys):
1895
"""Get a line iterator of the sort needed for findind references.
1897
Not relevant for non-xml inventory repositories.
1899
Ghosts in revision_keys are ignored.
1901
:param revision_keys: The revision keys for the inventories to inspect.
1902
:return: An iterator over (inventory line, revid) for the fulltexts of
1903
all of the xml inventories specified by revision_keys.
1905
stream = self.inventories.get_record_stream(keys, 'unordered', True)
1906
for record in stream:
1907
if record.storage_kind != 'absent':
1908
chunks = record.get_bytes_as('chunked')
1909
revid = record.key[-1]
1910
lines = osutils.chunks_to_lines(chunks)
1914
def _find_file_ids_from_xml_inventory_lines(self, line_iterator,
1916
"""Helper routine for fileids_altered_by_revision_ids.
1918
This performs the translation of xml lines to revision ids.
1920
:param line_iterator: An iterator of lines, origin_version_id
1921
:param revision_ids: The revision ids to filter for. This should be a
1922
set or other type which supports efficient __contains__ lookups, as
1923
the revision id from each parsed line will be looked up in the
1924
revision_ids filter.
1925
:return: a dictionary mapping altered file-ids to an iterable of
1926
revision_ids. Each altered file-ids has the exact revision_ids that
1927
altered it listed explicitly.
1929
seen = set(self._find_text_key_references_from_xml_inventory_lines(
1930
line_iterator).iterkeys())
1931
# Note that revision_ids are revision keys.
1932
parent_maps = self.revisions.get_parent_map(revision_ids)
1934
map(parents.update, parent_maps.itervalues())
1935
parents.difference_update(revision_ids)
1936
parent_seen = set(self._find_text_key_references_from_xml_inventory_lines(
1937
self._inventory_xml_lines_for_keys(parents)))
1938
new_keys = seen - parent_seen
1940
setdefault = result.setdefault
1941
for key in new_keys:
1942
setdefault(key[0], set()).add(key[-1])
1945
def fileids_altered_by_revision_ids(self, revision_ids, _inv_weave=None):
1946
"""Find the file ids and versions affected by revisions.
1948
:param revisions: an iterable containing revision ids.
1949
:param _inv_weave: The inventory weave from this repository or None.
1950
If None, the inventory weave will be opened automatically.
1951
:return: a dictionary mapping altered file-ids to an iterable of
1952
revision_ids. Each altered file-ids has the exact revision_ids that
1953
altered it listed explicitly.
1955
selected_keys = set((revid,) for revid in revision_ids)
1956
w = _inv_weave or self.inventories
1957
pb = ui.ui_factory.nested_progress_bar()
1959
return self._find_file_ids_from_xml_inventory_lines(
1960
w.iter_lines_added_or_present_in_keys(
1961
selected_keys, pb=pb),
1966
def iter_files_bytes(self, desired_files):
1967
"""Iterate through file versions.
1969
Files will not necessarily be returned in the order they occur in
1970
desired_files. No specific order is guaranteed.
1972
Yields pairs of identifier, bytes_iterator. identifier is an opaque
1973
value supplied by the caller as part of desired_files. It should
1974
uniquely identify the file version in the caller's context. (Examples:
1975
an index number or a TreeTransform trans_id.)
1977
bytes_iterator is an iterable of bytestrings for the file. The
1978
kind of iterable and length of the bytestrings are unspecified, but for
1979
this implementation, it is a list of bytes produced by
1980
VersionedFile.get_record_stream().
1982
:param desired_files: a list of (file_id, revision_id, identifier)
1986
for file_id, revision_id, callable_data in desired_files:
1987
text_keys[(file_id, revision_id)] = callable_data
1988
for record in self.texts.get_record_stream(text_keys, 'unordered', True):
1989
if record.storage_kind == 'absent':
1990
raise errors.RevisionNotPresent(record.key, self)
1991
yield text_keys[record.key], record.get_bytes_as('chunked')
1993
def _generate_text_key_index(self, text_key_references=None,
1995
"""Generate a new text key index for the repository.
1997
This is an expensive function that will take considerable time to run.
1999
:return: A dict mapping text keys ((file_id, revision_id) tuples) to a
2000
list of parents, also text keys. When a given key has no parents,
2001
the parents list will be [NULL_REVISION].
2003
# All revisions, to find inventory parents.
2004
if ancestors is None:
2005
graph = self.get_graph()
2006
ancestors = graph.get_parent_map(self.all_revision_ids())
2007
if text_key_references is None:
2008
text_key_references = self.find_text_key_references()
2009
pb = ui.ui_factory.nested_progress_bar()
2011
return self._do_generate_text_key_index(ancestors,
2012
text_key_references, pb)
2016
def _do_generate_text_key_index(self, ancestors, text_key_references, pb):
2017
"""Helper for _generate_text_key_index to avoid deep nesting."""
2018
revision_order = tsort.topo_sort(ancestors)
2019
invalid_keys = set()
2021
for revision_id in revision_order:
2022
revision_keys[revision_id] = set()
2023
text_count = len(text_key_references)
2024
# a cache of the text keys to allow reuse; costs a dict of all the
2025
# keys, but saves a 2-tuple for every child of a given key.
2027
for text_key, valid in text_key_references.iteritems():
2029
invalid_keys.add(text_key)
2031
revision_keys[text_key[1]].add(text_key)
2032
text_key_cache[text_key] = text_key
2033
del text_key_references
2035
text_graph = graph.Graph(graph.DictParentsProvider(text_index))
2036
NULL_REVISION = _mod_revision.NULL_REVISION
2037
# Set a cache with a size of 10 - this suffices for bzr.dev but may be
2038
# too small for large or very branchy trees. However, for 55K path
2039
# trees, it would be easy to use too much memory trivially. Ideally we
2040
# could gauge this by looking at available real memory etc, but this is
2041
# always a tricky proposition.
2042
inventory_cache = lru_cache.LRUCache(10)
2043
batch_size = 10 # should be ~150MB on a 55K path tree
2044
batch_count = len(revision_order) / batch_size + 1
2046
pb.update("Calculating text parents", processed_texts, text_count)
2047
for offset in xrange(batch_count):
2048
to_query = revision_order[offset * batch_size:(offset + 1) *
2052
for rev_tree in self.revision_trees(to_query):
2053
revision_id = rev_tree.get_revision_id()
2054
parent_ids = ancestors[revision_id]
2055
for text_key in revision_keys[revision_id]:
2056
pb.update("Calculating text parents", processed_texts)
2057
processed_texts += 1
2058
candidate_parents = []
2059
for parent_id in parent_ids:
2060
parent_text_key = (text_key[0], parent_id)
2062
check_parent = parent_text_key not in \
2063
revision_keys[parent_id]
2065
# the parent parent_id is a ghost:
2066
check_parent = False
2067
# truncate the derived graph against this ghost.
2068
parent_text_key = None
2070
# look at the parent commit details inventories to
2071
# determine possible candidates in the per file graph.
2074
inv = inventory_cache[parent_id]
2076
inv = self.revision_tree(parent_id).inventory
2077
inventory_cache[parent_id] = inv
2079
parent_entry = inv[text_key[0]]
2080
except (KeyError, errors.NoSuchId):
2082
if parent_entry is not None:
2084
text_key[0], parent_entry.revision)
2086
parent_text_key = None
2087
if parent_text_key is not None:
2088
candidate_parents.append(
2089
text_key_cache[parent_text_key])
2090
parent_heads = text_graph.heads(candidate_parents)
2091
new_parents = list(parent_heads)
2092
new_parents.sort(key=lambda x:candidate_parents.index(x))
2093
if new_parents == []:
2094
new_parents = [NULL_REVISION]
2095
text_index[text_key] = new_parents
2097
for text_key in invalid_keys:
2098
text_index[text_key] = [NULL_REVISION]
2101
def item_keys_introduced_by(self, revision_ids, _files_pb=None):
2102
"""Get an iterable listing the keys of all the data introduced by a set
2105
The keys will be ordered so that the corresponding items can be safely
2106
fetched and inserted in that order.
2108
:returns: An iterable producing tuples of (knit-kind, file-id,
2109
versions). knit-kind is one of 'file', 'inventory', 'signatures',
2110
'revisions'. file-id is None unless knit-kind is 'file'.
2112
for result in self._find_file_keys_to_fetch(revision_ids, _files_pb):
2115
for result in self._find_non_file_keys_to_fetch(revision_ids):
2118
def _find_file_keys_to_fetch(self, revision_ids, pb):
2119
# XXX: it's a bit weird to control the inventory weave caching in this
2120
# generator. Ideally the caching would be done in fetch.py I think. Or
2121
# maybe this generator should explicitly have the contract that it
2122
# should not be iterated until the previously yielded item has been
2124
inv_w = self.inventories
2126
# file ids that changed
2127
file_ids = self.fileids_altered_by_revision_ids(revision_ids, inv_w)
2129
num_file_ids = len(file_ids)
2130
for file_id, altered_versions in file_ids.iteritems():
2132
pb.update("fetch texts", count, num_file_ids)
2134
yield ("file", file_id, altered_versions)
2136
def _find_non_file_keys_to_fetch(self, revision_ids):
2138
yield ("inventory", None, revision_ids)
2141
# XXX: Note ATM no callers actually pay attention to this return
2142
# instead they just use the list of revision ids and ignore
2143
# missing sigs. Consider removing this work entirely
2144
revisions_with_signatures = set(self.signatures.get_parent_map(
2145
[(r,) for r in revision_ids]))
2146
revisions_with_signatures = set(
2147
[r for (r,) in revisions_with_signatures])
2148
revisions_with_signatures.intersection_update(revision_ids)
2149
yield ("signatures", None, revisions_with_signatures)
2152
yield ("revisions", None, revision_ids)
2155
def get_inventory(self, revision_id):
2156
"""Get Inventory object by revision id."""
2157
return self.iter_inventories([revision_id]).next()
2159
def iter_inventories(self, revision_ids):
2160
"""Get many inventories by revision_ids.
2162
This will buffer some or all of the texts used in constructing the
2163
inventories in memory, but will only parse a single inventory at a
2166
:param revision_ids: The expected revision ids of the inventories.
2167
:return: An iterator of inventories.
2169
if ((None in revision_ids)
2170
or (_mod_revision.NULL_REVISION in revision_ids)):
2171
raise ValueError('cannot get null revision inventory')
2172
return self._iter_inventories(revision_ids)
2174
def _iter_inventories(self, revision_ids):
2175
"""single-document based inventory iteration."""
2176
for text, revision_id in self._iter_inventory_xmls(revision_ids):
2177
yield self.deserialise_inventory(revision_id, text)
2179
def _iter_inventory_xmls(self, revision_ids):
2180
keys = [(revision_id,) for revision_id in revision_ids]
2181
stream = self.inventories.get_record_stream(keys, 'unordered', True)
2183
for record in stream:
2184
if record.storage_kind != 'absent':
2185
text_chunks[record.key] = record.get_bytes_as('chunked')
2187
raise errors.NoSuchRevision(self, record.key)
2189
chunks = text_chunks.pop(key)
2190
yield ''.join(chunks), key[-1]
2192
def deserialise_inventory(self, revision_id, xml):
2193
"""Transform the xml into an inventory object.
2195
:param revision_id: The expected revision id of the inventory.
2196
:param xml: A serialised inventory.
2198
result = self._serializer.read_inventory_from_string(xml, revision_id,
2199
entry_cache=self._inventory_entry_cache)
2200
if result.revision_id != revision_id:
2201
raise AssertionError('revision id mismatch %s != %s' % (
2202
result.revision_id, revision_id))
2205
def serialise_inventory(self, inv):
2206
return self._serializer.write_inventory_to_string(inv)
2208
def _serialise_inventory_to_lines(self, inv):
2209
return self._serializer.write_inventory_to_lines(inv)
2211
def get_serializer_format(self):
2212
return self._serializer.format_num
2215
def get_inventory_xml(self, revision_id):
2216
"""Get inventory XML as a file object."""
2217
texts = self._iter_inventory_xmls([revision_id])
2219
text, revision_id = texts.next()
2220
except StopIteration:
2221
raise errors.HistoryMissing(self, 'inventory', revision_id)
2225
def get_inventory_sha1(self, revision_id):
2226
"""Return the sha1 hash of the inventory entry
2228
return self.get_revision(revision_id).inventory_sha1
2230
def iter_reverse_revision_history(self, revision_id):
2231
"""Iterate backwards through revision ids in the lefthand history
2233
:param revision_id: The revision id to start with. All its lefthand
2234
ancestors will be traversed.
2236
graph = self.get_graph()
2237
next_id = revision_id
2239
if next_id in (None, _mod_revision.NULL_REVISION):
2242
# Note: The following line may raise KeyError in the event of
2243
# truncated history. We decided not to have a try:except:raise
2244
# RevisionNotPresent here until we see a use for it, because of the
2245
# cost in an inner loop that is by its very nature O(history).
2246
# Robert Collins 20080326
2248
parents = graph.get_parent_map([next_id])[next_id]
2250
raise errors.RevisionNotPresent(next_id, self)
2251
if len(parents) == 0:
2254
next_id = parents[0]
2257
def get_revision_inventory(self, revision_id):
2258
"""Return inventory of a past revision."""
2259
# TODO: Unify this with get_inventory()
2260
# bzr 0.0.6 and later imposes the constraint that the inventory_id
2261
# must be the same as its revision, so this is trivial.
2262
if revision_id is None:
2263
# This does not make sense: if there is no revision,
2264
# then it is the current tree inventory surely ?!
2265
# and thus get_root_id() is something that looks at the last
2266
# commit on the branch, and the get_root_id is an inventory check.
2267
raise NotImplementedError
2268
# return Inventory(self.get_root_id())
2270
return self.get_inventory(revision_id)
2272
def is_shared(self):
2273
"""Return True if this repository is flagged as a shared repository."""
2274
raise NotImplementedError(self.is_shared)
2277
def reconcile(self, other=None, thorough=False):
2278
"""Reconcile this repository."""
2279
from bzrlib.reconcile import RepoReconciler
2280
reconciler = RepoReconciler(self, thorough=thorough)
2281
reconciler.reconcile()
2284
def _refresh_data(self):
2285
"""Helper called from lock_* to ensure coherency with disk.
2287
The default implementation does nothing; it is however possible
2288
for repositories to maintain loaded indices across multiple locks
2289
by checking inside their implementation of this method to see
2290
whether their indices are still valid. This depends of course on
2291
the disk format being validatable in this manner. This method is
2292
also called by the refresh_data() public interface to cause a refresh
2293
to occur while in a write lock so that data inserted by a smart server
2294
push operation is visible on the client's instance of the physical
2299
def revision_tree(self, revision_id):
2300
"""Return Tree for a revision on this branch.
2302
`revision_id` may be NULL_REVISION for the empty tree revision.
2304
revision_id = _mod_revision.ensure_null(revision_id)
2305
# TODO: refactor this to use an existing revision object
2306
# so we don't need to read it in twice.
2307
if revision_id == _mod_revision.NULL_REVISION:
2308
return RevisionTree(self, Inventory(root_id=None),
2309
_mod_revision.NULL_REVISION)
2311
inv = self.get_revision_inventory(revision_id)
2312
return RevisionTree(self, inv, revision_id)
2314
def revision_trees(self, revision_ids):
2315
"""Return Trees for revisions in this repository.
2317
:param revision_ids: a sequence of revision-ids;
2318
a revision-id may not be None or 'null:'
2320
inventories = self.iter_inventories(revision_ids)
2321
for inv in inventories:
2322
yield RevisionTree(self, inv, inv.revision_id)
2324
def _filtered_revision_trees(self, revision_ids, file_ids):
2325
"""Return Tree for a revision on this branch with only some files.
2327
:param revision_ids: a sequence of revision-ids;
2328
a revision-id may not be None or 'null:'
2329
:param file_ids: if not None, the result is filtered
2330
so that only those file-ids, their parents and their
2331
children are included.
2333
inventories = self.iter_inventories(revision_ids)
2334
for inv in inventories:
2335
# Should we introduce a FilteredRevisionTree class rather
2336
# than pre-filter the inventory here?
2337
filtered_inv = inv.filter(file_ids)
2338
yield RevisionTree(self, filtered_inv, filtered_inv.revision_id)
2341
def get_ancestry(self, revision_id, topo_sorted=True):
2342
"""Return a list of revision-ids integrated by a revision.
2344
The first element of the list is always None, indicating the origin
2345
revision. This might change when we have history horizons, or
2346
perhaps we should have a new API.
2348
This is topologically sorted.
2350
if _mod_revision.is_null(revision_id):
2352
if not self.has_revision(revision_id):
2353
raise errors.NoSuchRevision(self, revision_id)
2354
graph = self.get_graph()
2356
search = graph._make_breadth_first_searcher([revision_id])
2359
found, ghosts = search.next_with_ghosts()
2360
except StopIteration:
2363
if _mod_revision.NULL_REVISION in keys:
2364
keys.remove(_mod_revision.NULL_REVISION)
2366
parent_map = graph.get_parent_map(keys)
2367
keys = tsort.topo_sort(parent_map)
2368
return [None] + list(keys)
2371
"""Compress the data within the repository.
2373
This operation only makes sense for some repository types. For other
2374
types it should be a no-op that just returns.
2376
This stub method does not require a lock, but subclasses should use
2377
@needs_write_lock as this is a long running call its reasonable to
2378
implicitly lock for the user.
2381
def get_transaction(self):
2382
return self.control_files.get_transaction()
2384
def get_parent_map(self, revision_ids):
2385
"""See graph._StackedParentsProvider.get_parent_map"""
2386
# revisions index works in keys; this just works in revisions
2387
# therefore wrap and unwrap
2390
for revision_id in revision_ids:
2391
if revision_id == _mod_revision.NULL_REVISION:
2392
result[revision_id] = ()
2393
elif revision_id is None:
2394
raise ValueError('get_parent_map(None) is not valid')
2396
query_keys.append((revision_id ,))
2397
for ((revision_id,), parent_keys) in \
2398
self.revisions.get_parent_map(query_keys).iteritems():
2400
result[revision_id] = tuple(parent_revid
2401
for (parent_revid,) in parent_keys)
2403
result[revision_id] = (_mod_revision.NULL_REVISION,)
2406
def _make_parents_provider(self):
2409
def get_graph(self, other_repository=None):
2410
"""Return the graph walker for this repository format"""
2411
parents_provider = self._make_parents_provider()
2412
if (other_repository is not None and
2413
not self.has_same_location(other_repository)):
2414
parents_provider = graph._StackedParentsProvider(
2415
[parents_provider, other_repository._make_parents_provider()])
2416
return graph.Graph(parents_provider)
2418
def _get_versioned_file_checker(self, text_key_references=None):
2419
"""Return an object suitable for checking versioned files.
2421
:param text_key_references: if non-None, an already built
2422
dictionary mapping text keys ((fileid, revision_id) tuples)
2423
to whether they were referred to by the inventory of the
2424
revision_id that they contain. If None, this will be
2427
return _VersionedFileChecker(self,
2428
text_key_references=text_key_references)
2430
def revision_ids_to_search_result(self, result_set):
2431
"""Convert a set of revision ids to a graph SearchResult."""
2432
result_parents = set()
2433
for parents in self.get_graph().get_parent_map(
2434
result_set).itervalues():
2435
result_parents.update(parents)
2436
included_keys = result_set.intersection(result_parents)
2437
start_keys = result_set.difference(included_keys)
2438
exclude_keys = result_parents.difference(result_set)
2439
result = graph.SearchResult(start_keys, exclude_keys,
2440
len(result_set), result_set)
2444
def set_make_working_trees(self, new_value):
2445
"""Set the policy flag for making working trees when creating branches.
2447
This only applies to branches that use this repository.
2449
The default is 'True'.
2450
:param new_value: True to restore the default, False to disable making
2453
raise NotImplementedError(self.set_make_working_trees)
2455
def make_working_trees(self):
2456
"""Returns the policy for making working trees on new branches."""
2457
raise NotImplementedError(self.make_working_trees)
2460
def sign_revision(self, revision_id, gpg_strategy):
2461
plaintext = Testament.from_revision(self, revision_id).as_short_text()
2462
self.store_revision_signature(gpg_strategy, plaintext, revision_id)
2465
def has_signature_for_revision_id(self, revision_id):
2466
"""Query for a revision signature for revision_id in the repository."""
2467
if not self.has_revision(revision_id):
2468
raise errors.NoSuchRevision(self, revision_id)
2469
sig_present = (1 == len(
2470
self.signatures.get_parent_map([(revision_id,)])))
2474
def get_signature_text(self, revision_id):
2475
"""Return the text for a signature."""
2476
stream = self.signatures.get_record_stream([(revision_id,)],
2478
record = stream.next()
2479
if record.storage_kind == 'absent':
2480
raise errors.NoSuchRevision(self, revision_id)
2481
return record.get_bytes_as('fulltext')
2484
def check(self, revision_ids=None):
2485
"""Check consistency of all history of given revision_ids.
2487
Different repository implementations should override _check().
2489
:param revision_ids: A non-empty list of revision_ids whose ancestry
2490
will be checked. Typically the last revision_id of a branch.
2492
return self._check(revision_ids)
2494
def _check(self, revision_ids):
2495
result = check.Check(self)
2499
def _warn_if_deprecated(self):
2500
global _deprecation_warning_done
2501
if _deprecation_warning_done:
2503
_deprecation_warning_done = True
2504
warning("Format %s for %s is deprecated - please use 'bzr upgrade' to get better performance"
2505
% (self._format, self.bzrdir.transport.base))
2507
def supports_rich_root(self):
2508
return self._format.rich_root_data
2510
def _check_ascii_revisionid(self, revision_id, method):
2511
"""Private helper for ascii-only repositories."""
2512
# weave repositories refuse to store revisionids that are non-ascii.
2513
if revision_id is not None:
2514
# weaves require ascii revision ids.
2515
if isinstance(revision_id, unicode):
2517
revision_id.encode('ascii')
2518
except UnicodeEncodeError:
2519
raise errors.NonAsciiRevisionId(method, self)
2522
revision_id.decode('ascii')
2523
except UnicodeDecodeError:
2524
raise errors.NonAsciiRevisionId(method, self)
2526
def revision_graph_can_have_wrong_parents(self):
2527
"""Is it possible for this repository to have a revision graph with
2530
If True, then this repository must also implement
2531
_find_inconsistent_revision_parents so that check and reconcile can
2532
check for inconsistencies before proceeding with other checks that may
2533
depend on the revision index being consistent.
2535
raise NotImplementedError(self.revision_graph_can_have_wrong_parents)
2538
# remove these delegates a while after bzr 0.15
2539
def __make_delegated(name, from_module):
2540
def _deprecated_repository_forwarder():
2541
symbol_versioning.warn('%s moved to %s in bzr 0.15'
2542
% (name, from_module),
2545
m = __import__(from_module, globals(), locals(), [name])
2547
return getattr(m, name)
2548
except AttributeError:
2549
raise AttributeError('module %s has no name %s'
2551
globals()[name] = _deprecated_repository_forwarder
2554
'AllInOneRepository',
2555
'WeaveMetaDirRepository',
2556
'PreSplitOutRepositoryFormat',
2557
'RepositoryFormat4',
2558
'RepositoryFormat5',
2559
'RepositoryFormat6',
2560
'RepositoryFormat7',
2562
__make_delegated(_name, 'bzrlib.repofmt.weaverepo')
2566
'RepositoryFormatKnit',
2567
'RepositoryFormatKnit1',
2569
__make_delegated(_name, 'bzrlib.repofmt.knitrepo')
2572
def install_revision(repository, rev, revision_tree):
2573
"""Install all revision data into a repository."""
2574
install_revisions(repository, [(rev, revision_tree, None)])
2577
def install_revisions(repository, iterable, num_revisions=None, pb=None):
2578
"""Install all revision data into a repository.
2580
Accepts an iterable of revision, tree, signature tuples. The signature
2583
repository.start_write_group()
2585
inventory_cache = lru_cache.LRUCache(10)
2586
for n, (revision, revision_tree, signature) in enumerate(iterable):
2587
_install_revision(repository, revision, revision_tree, signature,
2590
pb.update('Transferring revisions', n + 1, num_revisions)
2592
repository.abort_write_group()
2595
repository.commit_write_group()
2598
def _install_revision(repository, rev, revision_tree, signature,
2600
"""Install all revision data into a repository."""
2601
present_parents = []
2603
for p_id in rev.parent_ids:
2604
if repository.has_revision(p_id):
2605
present_parents.append(p_id)
2606
parent_trees[p_id] = repository.revision_tree(p_id)
2608
parent_trees[p_id] = repository.revision_tree(
2609
_mod_revision.NULL_REVISION)
2611
inv = revision_tree.inventory
2612
entries = inv.iter_entries()
2613
# backwards compatibility hack: skip the root id.
2614
if not repository.supports_rich_root():
2615
path, root = entries.next()
2616
if root.revision != rev.revision_id:
2617
raise errors.IncompatibleRevision(repr(repository))
2619
for path, ie in entries:
2620
text_keys[(ie.file_id, ie.revision)] = ie
2621
text_parent_map = repository.texts.get_parent_map(text_keys)
2622
missing_texts = set(text_keys) - set(text_parent_map)
2623
# Add the texts that are not already present
2624
for text_key in missing_texts:
2625
ie = text_keys[text_key]
2627
# FIXME: TODO: The following loop overlaps/duplicates that done by
2628
# commit to determine parents. There is a latent/real bug here where
2629
# the parents inserted are not those commit would do - in particular
2630
# they are not filtered by heads(). RBC, AB
2631
for revision, tree in parent_trees.iteritems():
2632
if ie.file_id not in tree:
2634
parent_id = tree.inventory[ie.file_id].revision
2635
if parent_id in text_parents:
2637
text_parents.append((ie.file_id, parent_id))
2638
lines = revision_tree.get_file(ie.file_id).readlines()
2639
repository.texts.add_lines(text_key, text_parents, lines)
2641
# install the inventory
2642
if repository._format._commit_inv_deltas and len(rev.parent_ids):
2643
# Cache this inventory
2644
inventory_cache[rev.revision_id] = inv
2646
basis_inv = inventory_cache[rev.parent_ids[0]]
2648
repository.add_inventory(rev.revision_id, inv, present_parents)
2650
delta = inv._make_delta(basis_inv)
2651
repository.add_inventory_by_delta(rev.parent_ids[0], delta,
2652
rev.revision_id, present_parents)
2654
repository.add_inventory(rev.revision_id, inv, present_parents)
2655
except errors.RevisionAlreadyPresent:
2657
if signature is not None:
2658
repository.add_signature_text(rev.revision_id, signature)
2659
repository.add_revision(rev.revision_id, rev, inv)
2662
class MetaDirRepository(Repository):
2663
"""Repositories in the new meta-dir layout.
2665
:ivar _transport: Transport for access to repository control files,
2666
typically pointing to .bzr/repository.
2669
def __init__(self, _format, a_bzrdir, control_files):
2670
super(MetaDirRepository, self).__init__(_format, a_bzrdir, control_files)
2671
self._transport = control_files._transport
2673
def is_shared(self):
2674
"""Return True if this repository is flagged as a shared repository."""
2675
return self._transport.has('shared-storage')
2678
def set_make_working_trees(self, new_value):
2679
"""Set the policy flag for making working trees when creating branches.
2681
This only applies to branches that use this repository.
2683
The default is 'True'.
2684
:param new_value: True to restore the default, False to disable making
2689
self._transport.delete('no-working-trees')
2690
except errors.NoSuchFile:
2693
self._transport.put_bytes('no-working-trees', '',
2694
mode=self.bzrdir._get_file_mode())
2696
def make_working_trees(self):
2697
"""Returns the policy for making working trees on new branches."""
2698
return not self._transport.has('no-working-trees')
2701
class MetaDirVersionedFileRepository(MetaDirRepository):
2702
"""Repositories in a meta-dir, that work via versioned file objects."""
2704
def __init__(self, _format, a_bzrdir, control_files):
2705
super(MetaDirVersionedFileRepository, self).__init__(_format, a_bzrdir,
2709
network_format_registry = registry.FormatRegistry()
2710
"""Registry of formats indexed by their network name.
2712
The network name for a repository format is an identifier that can be used when
2713
referring to formats with smart server operations. See
2714
RepositoryFormat.network_name() for more detail.
2718
format_registry = registry.FormatRegistry(network_format_registry)
2719
"""Registry of formats, indexed by their BzrDirMetaFormat format string.
2721
This can contain either format instances themselves, or classes/factories that
2722
can be called to obtain one.
2726
#####################################################################
2727
# Repository Formats
2729
class RepositoryFormat(object):
2730
"""A repository format.
2732
Formats provide four things:
2733
* An initialization routine to construct repository data on disk.
2734
* a optional format string which is used when the BzrDir supports
2736
* an open routine which returns a Repository instance.
2737
* A network name for referring to the format in smart server RPC
2740
There is one and only one Format subclass for each on-disk format. But
2741
there can be one Repository subclass that is used for several different
2742
formats. The _format attribute on a Repository instance can be used to
2743
determine the disk format.
2745
Formats are placed in a registry by their format string for reference
2746
during opening. These should be subclasses of RepositoryFormat for
2749
Once a format is deprecated, just deprecate the initialize and open
2750
methods on the format class. Do not deprecate the object, as the
2751
object may be created even when a repository instance hasn't been
2754
Common instance attributes:
2755
_matchingbzrdir - the bzrdir format that the repository format was
2756
originally written to work with. This can be used if manually
2757
constructing a bzrdir and repository, or more commonly for test suite
2761
# Set to True or False in derived classes. True indicates that the format
2762
# supports ghosts gracefully.
2763
supports_ghosts = None
2764
# Can this repository be given external locations to lookup additional
2765
# data. Set to True or False in derived classes.
2766
supports_external_lookups = None
2767
# Does this format support CHK bytestring lookups. Set to True or False in
2769
supports_chks = None
2770
# Should commit add an inventory, or an inventory delta to the repository.
2771
_commit_inv_deltas = True
2772
# What order should fetch operations request streams in?
2773
# The default is unordered as that is the cheapest for an origin to
2775
_fetch_order = 'unordered'
2776
# Does this repository format use deltas that can be fetched as-deltas ?
2777
# (E.g. knits, where the knit deltas can be transplanted intact.
2778
# We default to False, which will ensure that enough data to get
2779
# a full text out of any fetch stream will be grabbed.
2780
_fetch_uses_deltas = False
2781
# Should fetch trigger a reconcile after the fetch? Only needed for
2782
# some repository formats that can suffer internal inconsistencies.
2783
_fetch_reconcile = False
2784
# Does this format have < O(tree_size) delta generation. Used to hint what
2785
# code path for commit, amongst other things.
2789
return "<%s>" % self.__class__.__name__
2791
def __eq__(self, other):
2792
# format objects are generally stateless
2793
return isinstance(other, self.__class__)
2795
def __ne__(self, other):
2796
return not self == other
2799
def find_format(klass, a_bzrdir):
2800
"""Return the format for the repository object in a_bzrdir.
2802
This is used by bzr native formats that have a "format" file in
2803
the repository. Other methods may be used by different types of
2807
transport = a_bzrdir.get_repository_transport(None)
2808
format_string = transport.get("format").read()
2809
return format_registry.get(format_string)
2810
except errors.NoSuchFile:
2811
raise errors.NoRepositoryPresent(a_bzrdir)
2813
raise errors.UnknownFormatError(format=format_string,
2817
def register_format(klass, format):
2818
format_registry.register(format.get_format_string(), format)
2821
def unregister_format(klass, format):
2822
format_registry.remove(format.get_format_string())
2825
def get_default_format(klass):
2826
"""Return the current default format."""
2827
from bzrlib import bzrdir
2828
return bzrdir.format_registry.make_bzrdir('default').repository_format
2830
def get_format_string(self):
2831
"""Return the ASCII format string that identifies this format.
2833
Note that in pre format ?? repositories the format string is
2834
not permitted nor written to disk.
2836
raise NotImplementedError(self.get_format_string)
2838
def get_format_description(self):
2839
"""Return the short description for this format."""
2840
raise NotImplementedError(self.get_format_description)
2842
# TODO: this shouldn't be in the base class, it's specific to things that
2843
# use weaves or knits -- mbp 20070207
2844
def _get_versioned_file_store(self,
2849
versionedfile_class=None,
2850
versionedfile_kwargs={},
2852
if versionedfile_class is None:
2853
versionedfile_class = self._versionedfile_class
2854
weave_transport = control_files._transport.clone(name)
2855
dir_mode = control_files._dir_mode
2856
file_mode = control_files._file_mode
2857
return VersionedFileStore(weave_transport, prefixed=prefixed,
2859
file_mode=file_mode,
2860
versionedfile_class=versionedfile_class,
2861
versionedfile_kwargs=versionedfile_kwargs,
2864
def initialize(self, a_bzrdir, shared=False):
2865
"""Initialize a repository of this format in a_bzrdir.
2867
:param a_bzrdir: The bzrdir to put the new repository in it.
2868
:param shared: The repository should be initialized as a sharable one.
2869
:returns: The new repository object.
2871
This may raise UninitializableFormat if shared repository are not
2872
compatible the a_bzrdir.
2874
raise NotImplementedError(self.initialize)
2876
def is_supported(self):
2877
"""Is this format supported?
2879
Supported formats must be initializable and openable.
2880
Unsupported formats may not support initialization or committing or
2881
some other features depending on the reason for not being supported.
2885
def network_name(self):
2886
"""A simple byte string uniquely identifying this format for RPC calls.
2888
MetaDir repository formats use their disk format string to identify the
2889
repository over the wire. All in one formats such as bzr < 0.8, and
2890
foreign formats like svn/git and hg should use some marker which is
2891
unique and immutable.
2893
raise NotImplementedError(self.network_name)
2895
def check_conversion_target(self, target_format):
2896
raise NotImplementedError(self.check_conversion_target)
2898
def open(self, a_bzrdir, _found=False):
2899
"""Return an instance of this format for the bzrdir a_bzrdir.
2901
_found is a private parameter, do not use it.
2903
raise NotImplementedError(self.open)
2906
class MetaDirRepositoryFormat(RepositoryFormat):
2907
"""Common base class for the new repositories using the metadir layout."""
2909
rich_root_data = False
2910
supports_tree_reference = False
2911
supports_external_lookups = False
2914
def _matchingbzrdir(self):
2915
matching = bzrdir.BzrDirMetaFormat1()
2916
matching.repository_format = self
2920
super(MetaDirRepositoryFormat, self).__init__()
2922
def _create_control_files(self, a_bzrdir):
2923
"""Create the required files and the initial control_files object."""
2924
# FIXME: RBC 20060125 don't peek under the covers
2925
# NB: no need to escape relative paths that are url safe.
2926
repository_transport = a_bzrdir.get_repository_transport(self)
2927
control_files = lockable_files.LockableFiles(repository_transport,
2928
'lock', lockdir.LockDir)
2929
control_files.create_lock()
2930
return control_files
2932
def _upload_blank_content(self, a_bzrdir, dirs, files, utf8_files, shared):
2933
"""Upload the initial blank content."""
2934
control_files = self._create_control_files(a_bzrdir)
2935
control_files.lock_write()
2936
transport = control_files._transport
2938
utf8_files += [('shared-storage', '')]
2940
transport.mkdir_multi(dirs, mode=a_bzrdir._get_dir_mode())
2941
for (filename, content_stream) in files:
2942
transport.put_file(filename, content_stream,
2943
mode=a_bzrdir._get_file_mode())
2944
for (filename, content_bytes) in utf8_files:
2945
transport.put_bytes_non_atomic(filename, content_bytes,
2946
mode=a_bzrdir._get_file_mode())
2948
control_files.unlock()
2950
def network_name(self):
2951
"""Metadir formats have matching disk and network format strings."""
2952
return self.get_format_string()
2955
# Pre-0.8 formats that don't have a disk format string (because they are
2956
# versioned by the matching control directory). We use the control directories
2957
# disk format string as a key for the network_name because they meet the
2958
# constraints (simple string, unique, immutable).
2959
network_format_registry.register_lazy(
2960
"Bazaar-NG branch, format 5\n",
2961
'bzrlib.repofmt.weaverepo',
2962
'RepositoryFormat5',
2964
network_format_registry.register_lazy(
2965
"Bazaar-NG branch, format 6\n",
2966
'bzrlib.repofmt.weaverepo',
2967
'RepositoryFormat6',
2970
# formats which have no format string are not discoverable or independently
2971
# creatable on disk, so are not registered in format_registry. They're
2972
# all in bzrlib.repofmt.weaverepo now. When an instance of one of these is
2973
# needed, it's constructed directly by the BzrDir. Non-native formats where
2974
# the repository is not separately opened are similar.
2976
format_registry.register_lazy(
2977
'Bazaar-NG Repository format 7',
2978
'bzrlib.repofmt.weaverepo',
2982
format_registry.register_lazy(
2983
'Bazaar-NG Knit Repository Format 1',
2984
'bzrlib.repofmt.knitrepo',
2985
'RepositoryFormatKnit1',
2988
format_registry.register_lazy(
2989
'Bazaar Knit Repository Format 3 (bzr 0.15)\n',
2990
'bzrlib.repofmt.knitrepo',
2991
'RepositoryFormatKnit3',
2994
format_registry.register_lazy(
2995
'Bazaar Knit Repository Format 4 (bzr 1.0)\n',
2996
'bzrlib.repofmt.knitrepo',
2997
'RepositoryFormatKnit4',
3000
# Pack-based formats. There is one format for pre-subtrees, and one for
3001
# post-subtrees to allow ease of testing.
3002
# NOTE: These are experimental in 0.92. Stable in 1.0 and above
3003
format_registry.register_lazy(
3004
'Bazaar pack repository format 1 (needs bzr 0.92)\n',
3005
'bzrlib.repofmt.pack_repo',
3006
'RepositoryFormatKnitPack1',
3008
format_registry.register_lazy(
3009
'Bazaar pack repository format 1 with subtree support (needs bzr 0.92)\n',
3010
'bzrlib.repofmt.pack_repo',
3011
'RepositoryFormatKnitPack3',
3013
format_registry.register_lazy(
3014
'Bazaar pack repository format 1 with rich root (needs bzr 1.0)\n',
3015
'bzrlib.repofmt.pack_repo',
3016
'RepositoryFormatKnitPack4',
3018
format_registry.register_lazy(
3019
'Bazaar RepositoryFormatKnitPack5 (bzr 1.6)\n',
3020
'bzrlib.repofmt.pack_repo',
3021
'RepositoryFormatKnitPack5',
3023
format_registry.register_lazy(
3024
'Bazaar RepositoryFormatKnitPack5RichRoot (bzr 1.6.1)\n',
3025
'bzrlib.repofmt.pack_repo',
3026
'RepositoryFormatKnitPack5RichRoot',
3028
format_registry.register_lazy(
3029
'Bazaar RepositoryFormatKnitPack5RichRoot (bzr 1.6)\n',
3030
'bzrlib.repofmt.pack_repo',
3031
'RepositoryFormatKnitPack5RichRootBroken',
3033
format_registry.register_lazy(
3034
'Bazaar RepositoryFormatKnitPack6 (bzr 1.9)\n',
3035
'bzrlib.repofmt.pack_repo',
3036
'RepositoryFormatKnitPack6',
3038
format_registry.register_lazy(
3039
'Bazaar RepositoryFormatKnitPack6RichRoot (bzr 1.9)\n',
3040
'bzrlib.repofmt.pack_repo',
3041
'RepositoryFormatKnitPack6RichRoot',
3044
# Development formats.
3045
# Obsolete but kept pending a CHK based subtree format.
3046
format_registry.register_lazy(
3047
("Bazaar development format 2 with subtree support "
3048
"(needs bzr.dev from before 1.8)\n"),
3049
'bzrlib.repofmt.pack_repo',
3050
'RepositoryFormatPackDevelopment2Subtree',
3053
# 1.14->1.16 go below here
3054
format_registry.register_lazy(
3055
'Bazaar development format - group compression and chk inventory'
3056
' (needs bzr.dev from 1.14)\n',
3057
'bzrlib.repofmt.groupcompress_repo',
3058
'RepositoryFormatCHK1',
3062
class InterRepository(InterObject):
3063
"""This class represents operations taking place between two repositories.
3065
Its instances have methods like copy_content and fetch, and contain
3066
references to the source and target repositories these operations can be
3069
Often we will provide convenience methods on 'repository' which carry out
3070
operations with another repository - they will always forward to
3071
InterRepository.get(other).method_name(parameters).
3074
_walk_to_common_revisions_batch_size = 50
3076
"""The available optimised InterRepository types."""
3079
def copy_content(self, revision_id=None):
3080
"""Make a complete copy of the content in self into destination.
3082
This is a destructive operation! Do not use it on existing
3085
:param revision_id: Only copy the content needed to construct
3086
revision_id and its parents.
3089
self.target.set_make_working_trees(self.source.make_working_trees())
3090
except NotImplementedError:
3092
self.target.fetch(self.source, revision_id=revision_id)
3095
def fetch(self, revision_id=None, pb=None, find_ghosts=False,
3097
"""Fetch the content required to construct revision_id.
3099
The content is copied from self.source to self.target.
3101
:param revision_id: if None all content is copied, if NULL_REVISION no
3103
:param pb: optional progress bar to use for progress reports. If not
3104
provided a default one will be created.
3107
from bzrlib.fetch import RepoFetcher
3108
f = RepoFetcher(to_repository=self.target,
3109
from_repository=self.source,
3110
last_revision=revision_id,
3111
fetch_spec=fetch_spec,
3112
pb=pb, find_ghosts=find_ghosts)
3114
def _walk_to_common_revisions(self, revision_ids):
3115
"""Walk out from revision_ids in source to revisions target has.
3117
:param revision_ids: The start point for the search.
3118
:return: A set of revision ids.
3120
target_graph = self.target.get_graph()
3121
revision_ids = frozenset(revision_ids)
3122
missing_revs = set()
3123
source_graph = self.source.get_graph()
3124
# ensure we don't pay silly lookup costs.
3125
searcher = source_graph._make_breadth_first_searcher(revision_ids)
3126
null_set = frozenset([_mod_revision.NULL_REVISION])
3127
searcher_exhausted = False
3131
# Iterate the searcher until we have enough next_revs
3132
while len(next_revs) < self._walk_to_common_revisions_batch_size:
3134
next_revs_part, ghosts_part = searcher.next_with_ghosts()
3135
next_revs.update(next_revs_part)
3136
ghosts.update(ghosts_part)
3137
except StopIteration:
3138
searcher_exhausted = True
3140
# If there are ghosts in the source graph, and the caller asked for
3141
# them, make sure that they are present in the target.
3142
# We don't care about other ghosts as we can't fetch them and
3143
# haven't been asked to.
3144
ghosts_to_check = set(revision_ids.intersection(ghosts))
3145
revs_to_get = set(next_revs).union(ghosts_to_check)
3147
have_revs = set(target_graph.get_parent_map(revs_to_get))
3148
# we always have NULL_REVISION present.
3149
have_revs = have_revs.union(null_set)
3150
# Check if the target is missing any ghosts we need.
3151
ghosts_to_check.difference_update(have_revs)
3153
# One of the caller's revision_ids is a ghost in both the
3154
# source and the target.
3155
raise errors.NoSuchRevision(
3156
self.source, ghosts_to_check.pop())
3157
missing_revs.update(next_revs - have_revs)
3158
# Because we may have walked past the original stop point, make
3159
# sure everything is stopped
3160
stop_revs = searcher.find_seen_ancestors(have_revs)
3161
searcher.stop_searching_any(stop_revs)
3162
if searcher_exhausted:
3164
return searcher.get_result()
3167
def search_missing_revision_ids(self, revision_id=None, find_ghosts=True):
3168
"""Return the revision ids that source has that target does not.
3170
:param revision_id: only return revision ids included by this
3172
:param find_ghosts: If True find missing revisions in deep history
3173
rather than just finding the surface difference.
3174
:return: A bzrlib.graph.SearchResult.
3176
# stop searching at found target revisions.
3177
if not find_ghosts and revision_id is not None:
3178
return self._walk_to_common_revisions([revision_id])
3179
# generic, possibly worst case, slow code path.
3180
target_ids = set(self.target.all_revision_ids())
3181
if revision_id is not None:
3182
source_ids = self.source.get_ancestry(revision_id)
3183
if source_ids[0] is not None:
3184
raise AssertionError()
3187
source_ids = self.source.all_revision_ids()
3188
result_set = set(source_ids).difference(target_ids)
3189
return self.source.revision_ids_to_search_result(result_set)
3192
def _same_model(source, target):
3193
"""True if source and target have the same data representation.
3195
Note: this is always called on the base class; overriding it in a
3196
subclass will have no effect.
3199
InterRepository._assert_same_model(source, target)
3201
except errors.IncompatibleRepositories, e:
3205
def _assert_same_model(source, target):
3206
"""Raise an exception if two repositories do not use the same model.
3208
if source.supports_rich_root() != target.supports_rich_root():
3209
raise errors.IncompatibleRepositories(source, target,
3210
"different rich-root support")
3211
if source._serializer != target._serializer:
3212
raise errors.IncompatibleRepositories(source, target,
3213
"different serializers")
3216
class InterSameDataRepository(InterRepository):
3217
"""Code for converting between repositories that represent the same data.
3219
Data format and model must match for this to work.
3223
def _get_repo_format_to_test(self):
3224
"""Repository format for testing with.
3226
InterSameData can pull from subtree to subtree and from non-subtree to
3227
non-subtree, so we test this with the richest repository format.
3229
from bzrlib.repofmt import knitrepo
3230
return knitrepo.RepositoryFormatKnit3()
3233
def is_compatible(source, target):
3234
return InterRepository._same_model(source, target)
3237
class InterWeaveRepo(InterSameDataRepository):
3238
"""Optimised code paths between Weave based repositories.
3240
This should be in bzrlib/repofmt/weaverepo.py but we have not yet
3241
implemented lazy inter-object optimisation.
3245
def _get_repo_format_to_test(self):
3246
from bzrlib.repofmt import weaverepo
3247
return weaverepo.RepositoryFormat7()
3250
def is_compatible(source, target):
3251
"""Be compatible with known Weave formats.
3253
We don't test for the stores being of specific types because that
3254
could lead to confusing results, and there is no need to be
3257
from bzrlib.repofmt.weaverepo import (
3263
return (isinstance(source._format, (RepositoryFormat5,
3265
RepositoryFormat7)) and
3266
isinstance(target._format, (RepositoryFormat5,
3268
RepositoryFormat7)))
3269
except AttributeError:
3273
def copy_content(self, revision_id=None):
3274
"""See InterRepository.copy_content()."""
3275
# weave specific optimised path:
3277
self.target.set_make_working_trees(self.source.make_working_trees())
3278
except (errors.RepositoryUpgradeRequired, NotImplemented):
3280
# FIXME do not peek!
3281
if self.source._transport.listable():
3282
pb = ui.ui_factory.nested_progress_bar()
3284
self.target.texts.insert_record_stream(
3285
self.source.texts.get_record_stream(
3286
self.source.texts.keys(), 'topological', False))
3287
pb.update('copying inventory', 0, 1)
3288
self.target.inventories.insert_record_stream(
3289
self.source.inventories.get_record_stream(
3290
self.source.inventories.keys(), 'topological', False))
3291
self.target.signatures.insert_record_stream(
3292
self.source.signatures.get_record_stream(
3293
self.source.signatures.keys(),
3295
self.target.revisions.insert_record_stream(
3296
self.source.revisions.get_record_stream(
3297
self.source.revisions.keys(),
3298
'topological', True))
3302
self.target.fetch(self.source, revision_id=revision_id)
3305
def search_missing_revision_ids(self, revision_id=None, find_ghosts=True):
3306
"""See InterRepository.missing_revision_ids()."""
3307
# we want all revisions to satisfy revision_id in source.
3308
# but we don't want to stat every file here and there.
3309
# we want then, all revisions other needs to satisfy revision_id
3310
# checked, but not those that we have locally.
3311
# so the first thing is to get a subset of the revisions to
3312
# satisfy revision_id in source, and then eliminate those that
3313
# we do already have.
3314
# this is slow on high latency connection to self, but as this
3315
# disk format scales terribly for push anyway due to rewriting
3316
# inventory.weave, this is considered acceptable.
3318
if revision_id is not None:
3319
source_ids = self.source.get_ancestry(revision_id)
3320
if source_ids[0] is not None:
3321
raise AssertionError()
3324
source_ids = self.source._all_possible_ids()
3325
source_ids_set = set(source_ids)
3326
# source_ids is the worst possible case we may need to pull.
3327
# now we want to filter source_ids against what we actually
3328
# have in target, but don't try to check for existence where we know
3329
# we do not have a revision as that would be pointless.
3330
target_ids = set(self.target._all_possible_ids())
3331
possibly_present_revisions = target_ids.intersection(source_ids_set)
3332
actually_present_revisions = set(
3333
self.target._eliminate_revisions_not_present(possibly_present_revisions))
3334
required_revisions = source_ids_set.difference(actually_present_revisions)
3335
if revision_id is not None:
3336
# we used get_ancestry to determine source_ids then we are assured all
3337
# revisions referenced are present as they are installed in topological order.
3338
# and the tip revision was validated by get_ancestry.
3339
result_set = required_revisions
3341
# if we just grabbed the possibly available ids, then
3342
# we only have an estimate of whats available and need to validate
3343
# that against the revision records.
3345
self.source._eliminate_revisions_not_present(required_revisions))
3346
return self.source.revision_ids_to_search_result(result_set)
3349
class InterKnitRepo(InterSameDataRepository):
3350
"""Optimised code paths between Knit based repositories."""
3353
def _get_repo_format_to_test(self):
3354
from bzrlib.repofmt import knitrepo
3355
return knitrepo.RepositoryFormatKnit1()
3358
def is_compatible(source, target):
3359
"""Be compatible with known Knit formats.
3361
We don't test for the stores being of specific types because that
3362
could lead to confusing results, and there is no need to be
3365
from bzrlib.repofmt.knitrepo import RepositoryFormatKnit
3367
are_knits = (isinstance(source._format, RepositoryFormatKnit) and
3368
isinstance(target._format, RepositoryFormatKnit))
3369
except AttributeError:
3371
return are_knits and InterRepository._same_model(source, target)
3374
def search_missing_revision_ids(self, revision_id=None, find_ghosts=True):
3375
"""See InterRepository.missing_revision_ids()."""
3376
if revision_id is not None:
3377
source_ids = self.source.get_ancestry(revision_id)
3378
if source_ids[0] is not None:
3379
raise AssertionError()
3382
source_ids = self.source.all_revision_ids()
3383
source_ids_set = set(source_ids)
3384
# source_ids is the worst possible case we may need to pull.
3385
# now we want to filter source_ids against what we actually
3386
# have in target, but don't try to check for existence where we know
3387
# we do not have a revision as that would be pointless.
3388
target_ids = set(self.target.all_revision_ids())
3389
possibly_present_revisions = target_ids.intersection(source_ids_set)
3390
actually_present_revisions = set(
3391
self.target._eliminate_revisions_not_present(possibly_present_revisions))
3392
required_revisions = source_ids_set.difference(actually_present_revisions)
3393
if revision_id is not None:
3394
# we used get_ancestry to determine source_ids then we are assured all
3395
# revisions referenced are present as they are installed in topological order.
3396
# and the tip revision was validated by get_ancestry.
3397
result_set = required_revisions
3399
# if we just grabbed the possibly available ids, then
3400
# we only have an estimate of whats available and need to validate
3401
# that against the revision records.
3403
self.source._eliminate_revisions_not_present(required_revisions))
3404
return self.source.revision_ids_to_search_result(result_set)
3407
class InterPackRepo(InterSameDataRepository):
3408
"""Optimised code paths between Pack based repositories."""
3411
def _get_repo_format_to_test(self):
3412
from bzrlib.repofmt import pack_repo
3413
return pack_repo.RepositoryFormatKnitPack6RichRoot()
3416
def is_compatible(source, target):
3417
"""Be compatible with known Pack formats.
3419
We don't test for the stores being of specific types because that
3420
could lead to confusing results, and there is no need to be
3423
InterPackRepo does not support CHK based repositories.
3425
from bzrlib.repofmt.pack_repo import RepositoryFormatPack
3426
from bzrlib.repofmt.groupcompress_repo import RepositoryFormatCHK1
3428
are_packs = (isinstance(source._format, RepositoryFormatPack) and
3429
isinstance(target._format, RepositoryFormatPack))
3430
not_packs = (isinstance(source._format, RepositoryFormatCHK1) or
3431
isinstance(target._format, RepositoryFormatCHK1))
3432
except AttributeError:
3434
if not_packs or not are_packs:
3436
return InterRepository._same_model(source, target)
3439
def fetch(self, revision_id=None, pb=None, find_ghosts=False,
3441
"""See InterRepository.fetch()."""
3442
if (len(self.source._fallback_repositories) > 0 or
3443
len(self.target._fallback_repositories) > 0):
3444
# The pack layer is not aware of fallback repositories, so when
3445
# fetching from a stacked repository or into a stacked repository
3446
# we use the generic fetch logic which uses the VersionedFiles
3447
# attributes on repository.
3448
from bzrlib.fetch import RepoFetcher
3449
fetcher = RepoFetcher(self.target, self.source, revision_id,
3450
pb, find_ghosts, fetch_spec=fetch_spec)
3451
if fetch_spec is not None:
3452
if len(list(fetch_spec.heads)) != 1:
3453
raise AssertionError(
3454
"InterPackRepo.fetch doesn't support "
3455
"fetching multiple heads yet.")
3456
revision_id = list(fetch_spec.heads)[0]
3458
if revision_id is None:
3460
# everything to do - use pack logic
3461
# to fetch from all packs to one without
3462
# inventory parsing etc, IFF nothing to be copied is in the target.
3464
source_revision_ids = frozenset(self.source.all_revision_ids())
3465
revision_ids = source_revision_ids - \
3466
frozenset(self.target.get_parent_map(source_revision_ids))
3467
revision_keys = [(revid,) for revid in revision_ids]
3468
index = self.target._pack_collection.revision_index.combined_index
3469
present_revision_ids = set(item[1][0] for item in
3470
index.iter_entries(revision_keys))
3471
revision_ids = set(revision_ids) - present_revision_ids
3472
# implementing the TODO will involve:
3473
# - detecting when all of a pack is selected
3474
# - avoiding as much as possible pre-selection, so the
3475
# more-core routines such as create_pack_from_packs can filter in
3476
# a just-in-time fashion. (though having a HEADS list on a
3477
# repository might make this a lot easier, because we could
3478
# sensibly detect 'new revisions' without doing a full index scan.
3479
elif _mod_revision.is_null(revision_id):
3483
revision_ids = self.search_missing_revision_ids(revision_id,
3484
find_ghosts=find_ghosts).get_keys()
3485
if len(revision_ids) == 0:
3487
return self._pack(self.source, self.target, revision_ids)
3489
def _pack(self, source, target, revision_ids):
3490
from bzrlib.repofmt.pack_repo import Packer
3491
packs = source._pack_collection.all_packs()
3492
pack = Packer(self.target._pack_collection, packs, '.fetch',
3493
revision_ids).pack()
3494
if pack is not None:
3495
self.target._pack_collection._save_pack_names()
3496
copied_revs = pack.get_revision_count()
3497
# Trigger an autopack. This may duplicate effort as we've just done
3498
# a pack creation, but for now it is simpler to think about as
3499
# 'upload data, then repack if needed'.
3500
self.target._pack_collection.autopack()
3501
return (copied_revs, [])
3506
def search_missing_revision_ids(self, revision_id=None, find_ghosts=True):
3507
"""See InterRepository.missing_revision_ids().
3509
:param find_ghosts: Find ghosts throughout the ancestry of
3512
if not find_ghosts and revision_id is not None:
3513
return self._walk_to_common_revisions([revision_id])
3514
elif revision_id is not None:
3515
# Find ghosts: search for revisions pointing from one repository to
3516
# the other, and vice versa, anywhere in the history of revision_id.
3517
graph = self.target.get_graph(other_repository=self.source)
3518
searcher = graph._make_breadth_first_searcher([revision_id])
3522
next_revs, ghosts = searcher.next_with_ghosts()
3523
except StopIteration:
3525
if revision_id in ghosts:
3526
raise errors.NoSuchRevision(self.source, revision_id)
3527
found_ids.update(next_revs)
3528
found_ids.update(ghosts)
3529
found_ids = frozenset(found_ids)
3530
# Double query here: should be able to avoid this by changing the
3531
# graph api further.
3532
result_set = found_ids - frozenset(
3533
self.target.get_parent_map(found_ids))
3535
source_ids = self.source.all_revision_ids()
3536
# source_ids is the worst possible case we may need to pull.
3537
# now we want to filter source_ids against what we actually
3538
# have in target, but don't try to check for existence where we know
3539
# we do not have a revision as that would be pointless.
3540
target_ids = set(self.target.all_revision_ids())
3541
result_set = set(source_ids).difference(target_ids)
3542
return self.source.revision_ids_to_search_result(result_set)
3545
class InterDifferingSerializer(InterRepository):
3548
def _get_repo_format_to_test(self):
3552
def is_compatible(source, target):
3553
"""Be compatible with Knit2 source and Knit3 target"""
3554
# This is redundant with format.check_conversion_target(), however that
3555
# raises an exception, and we just want to say "False" as in we won't
3556
# support converting between these formats.
3557
if source.supports_rich_root() and not target.supports_rich_root():
3559
if (source._format.supports_tree_reference
3560
and not target._format.supports_tree_reference):
3564
def _get_delta_for_revision(self, tree, parent_ids, basis_id, cache):
3565
"""Get the best delta and base for this revision.
3567
:return: (basis_id, delta)
3569
possible_trees = [(parent_id, cache[parent_id])
3570
for parent_id in parent_ids
3571
if parent_id in cache]
3572
if len(possible_trees) == 0:
3573
# There either aren't any parents, or the parents aren't in the
3574
# cache, so just use the last converted tree
3575
possible_trees.append((basis_id, cache[basis_id]))
3577
for basis_id, basis_tree in possible_trees:
3578
delta = tree.inventory._make_delta(basis_tree.inventory)
3579
deltas.append((len(delta), basis_id, delta))
3581
return deltas[0][1:]
3583
def _get_parent_keys(self, root_key, parent_map):
3584
"""Get the parent keys for a given root id."""
3585
root_id, rev_id = root_key
3586
# Include direct parents of the revision, but only if they used
3587
# the same root_id and are heads.
3589
for parent_id in parent_map[rev_id]:
3590
if parent_id == _mod_revision.NULL_REVISION:
3592
if parent_id not in self._revision_id_to_root_id:
3593
# We probably didn't read this revision, go spend the
3594
# extra effort to actually check
3596
tree = self.source.revision_tree(parent_id)
3597
except errors.NoSuchRevision:
3598
# Ghost, fill out _revision_id_to_root_id in case we
3599
# encounter this again.
3600
# But set parent_root_id to None since we don't really know
3601
parent_root_id = None
3603
parent_root_id = tree.get_root_id()
3604
self._revision_id_to_root_id[parent_id] = None
3606
parent_root_id = self._revision_id_to_root_id[parent_id]
3607
if root_id == parent_root_id:
3608
# With stacking we _might_ want to refer to a non-local
3609
# revision, but this code path only applies when we have the
3610
# full content available, so ghosts really are ghosts, not just
3611
# the edge of local data.
3612
parent_keys.append((parent_id,))
3614
# root_id may be in the parent anyway.
3616
tree = self.source.revision_tree(parent_id)
3617
except errors.NoSuchRevision:
3618
# ghost, can't refer to it.
3622
parent_keys.append((tree.inventory[root_id].revision,))
3623
except errors.NoSuchId:
3626
g = graph.Graph(self.source.revisions)
3627
heads = g.heads(parent_keys)
3629
for key in parent_keys:
3630
if key in heads and key not in selected_keys:
3631
selected_keys.append(key)
3632
return tuple([(root_id,)+ key for key in selected_keys])
3634
def _new_root_data_stream(self, root_keys_to_create, parent_map):
3635
for root_key in root_keys_to_create:
3636
parent_keys = self._get_parent_keys(root_key, parent_map)
3637
yield versionedfile.FulltextContentFactory(root_key,
3638
parent_keys, None, '')
3640
def _fetch_batch(self, revision_ids, basis_id, cache):
3641
"""Fetch across a few revisions.
3643
:param revision_ids: The revisions to copy
3644
:param basis_id: The revision_id of a tree that must be in cache, used
3645
as a basis for delta when no other base is available
3646
:param cache: A cache of RevisionTrees that we can use.
3647
:return: The revision_id of the last converted tree. The RevisionTree
3648
for it will be in cache
3650
# Walk though all revisions; get inventory deltas, copy referenced
3651
# texts that delta references, insert the delta, revision and
3653
root_keys_to_create = set()
3656
pending_revisions = []
3657
parent_map = self.source.get_parent_map(revision_ids)
3658
for tree in self.source.revision_trees(revision_ids):
3659
current_revision_id = tree.get_revision_id()
3660
parent_ids = parent_map.get(current_revision_id, ())
3661
basis_id, delta = self._get_delta_for_revision(tree, parent_ids,
3663
if self._converting_to_rich_root:
3664
self._revision_id_to_root_id[current_revision_id] = \
3666
# Find text entries that need to be copied
3667
for old_path, new_path, file_id, entry in delta:
3668
if new_path is not None:
3671
if not self.target.supports_rich_root():
3672
# The target doesn't support rich root, so we don't
3675
if self._converting_to_rich_root:
3676
# This can't be copied normally, we have to insert
3678
root_keys_to_create.add((file_id, entry.revision))
3680
text_keys.add((file_id, entry.revision))
3681
revision = self.source.get_revision(current_revision_id)
3682
pending_deltas.append((basis_id, delta,
3683
current_revision_id, revision.parent_ids))
3684
pending_revisions.append(revision)
3685
cache[current_revision_id] = tree
3686
basis_id = current_revision_id
3688
from_texts = self.source.texts
3689
to_texts = self.target.texts
3690
if root_keys_to_create:
3691
root_stream = self._new_root_data_stream(root_keys_to_create,
3693
to_texts.insert_record_stream(root_stream)
3694
to_texts.insert_record_stream(from_texts.get_record_stream(
3695
text_keys, self.target._format._fetch_order,
3696
not self.target._format._fetch_uses_deltas))
3697
# insert inventory deltas
3698
for delta in pending_deltas:
3699
self.target.add_inventory_by_delta(*delta)
3700
if self.target._fallback_repositories:
3701
# Make sure this stacked repository has all the parent inventories
3702
# for the new revisions that we are about to insert. We do this
3703
# before adding the revisions so that no revision is added until
3704
# all the inventories it may depend on are added.
3706
revision_ids = set()
3707
for revision in pending_revisions:
3708
revision_ids.add(revision.revision_id)
3709
parent_ids.update(revision.parent_ids)
3710
parent_ids.difference_update(revision_ids)
3711
parent_ids.discard(_mod_revision.NULL_REVISION)
3712
parent_map = self.source.get_parent_map(parent_ids)
3713
for parent_tree in self.source.revision_trees(parent_ids):
3714
basis_id, delta = self._get_delta_for_revision(tree, parent_ids, basis_id, cache)
3715
current_revision_id = parent_tree.get_revision_id()
3716
parents_parents = parent_map[current_revision_id]
3717
self.target.add_inventory_by_delta(
3718
basis_id, delta, current_revision_id, parents_parents)
3719
# insert signatures and revisions
3720
for revision in pending_revisions:
3722
signature = self.source.get_signature_text(
3723
revision.revision_id)
3724
self.target.add_signature_text(revision.revision_id,
3726
except errors.NoSuchRevision:
3728
self.target.add_revision(revision.revision_id, revision)
3731
def _fetch_all_revisions(self, revision_ids, pb):
3732
"""Fetch everything for the list of revisions.
3734
:param revision_ids: The list of revisions to fetch. Must be in
3736
:param pb: A ProgressBar
3739
basis_id, basis_tree = self._get_basis(revision_ids[0])
3741
cache = lru_cache.LRUCache(100)
3742
cache[basis_id] = basis_tree
3743
del basis_tree # We don't want to hang on to it here
3744
for offset in range(0, len(revision_ids), batch_size):
3745
self.target.start_write_group()
3747
pb.update('Transferring revisions', offset,
3749
batch = revision_ids[offset:offset+batch_size]
3750
basis_id = self._fetch_batch(batch, basis_id, cache)
3752
self.target.abort_write_group()
3755
self.target.commit_write_group()
3756
pb.update('Transferring revisions', len(revision_ids),
3760
def fetch(self, revision_id=None, pb=None, find_ghosts=False,
3762
"""See InterRepository.fetch()."""
3763
if fetch_spec is not None:
3764
raise AssertionError("Not implemented yet...")
3765
if (not self.source.supports_rich_root()
3766
and self.target.supports_rich_root()):
3767
self._converting_to_rich_root = True
3768
self._revision_id_to_root_id = {}
3770
self._converting_to_rich_root = False
3771
revision_ids = self.target.search_missing_revision_ids(self.source,
3772
revision_id, find_ghosts=find_ghosts).get_keys()
3773
if not revision_ids:
3775
revision_ids = tsort.topo_sort(
3776
self.source.get_graph().get_parent_map(revision_ids))
3777
if not revision_ids:
3779
# Walk though all revisions; get inventory deltas, copy referenced
3780
# texts that delta references, insert the delta, revision and
3782
first_rev = self.source.get_revision(revision_ids[0])
3784
my_pb = ui.ui_factory.nested_progress_bar()
3787
symbol_versioning.warn(
3788
symbol_versioning.deprecated_in((1, 14, 0))
3789
% "pb parameter to fetch()")
3792
self._fetch_all_revisions(revision_ids, pb)
3794
if my_pb is not None:
3796
return len(revision_ids), 0
3798
def _get_basis(self, first_revision_id):
3799
"""Get a revision and tree which exists in the target.
3801
This assumes that first_revision_id is selected for transmission
3802
because all other ancestors are already present. If we can't find an
3803
ancestor we fall back to NULL_REVISION since we know that is safe.
3805
:return: (basis_id, basis_tree)
3807
first_rev = self.source.get_revision(first_revision_id)
3809
basis_id = first_rev.parent_ids[0]
3810
# only valid as a basis if the target has it
3811
self.target.get_revision(basis_id)
3812
# Try to get a basis tree - if its a ghost it will hit the
3813
# NoSuchRevision case.
3814
basis_tree = self.source.revision_tree(basis_id)
3815
except (IndexError, errors.NoSuchRevision):
3816
basis_id = _mod_revision.NULL_REVISION
3817
basis_tree = self.source.revision_tree(basis_id)
3818
return basis_id, basis_tree
3821
InterRepository.register_optimiser(InterDifferingSerializer)
3822
InterRepository.register_optimiser(InterSameDataRepository)
3823
InterRepository.register_optimiser(InterWeaveRepo)
3824
InterRepository.register_optimiser(InterKnitRepo)
3825
InterRepository.register_optimiser(InterPackRepo)
3828
class CopyConverter(object):
3829
"""A repository conversion tool which just performs a copy of the content.
3831
This is slow but quite reliable.
3834
def __init__(self, target_format):
3835
"""Create a CopyConverter.
3837
:param target_format: The format the resulting repository should be.
3839
self.target_format = target_format
3841
def convert(self, repo, pb):
3842
"""Perform the conversion of to_convert, giving feedback via pb.
3844
:param to_convert: The disk object to convert.
3845
:param pb: a progress bar to use for progress information.
3850
# this is only useful with metadir layouts - separated repo content.
3851
# trigger an assertion if not such
3852
repo._format.get_format_string()
3853
self.repo_dir = repo.bzrdir
3854
self.step('Moving repository to repository.backup')
3855
self.repo_dir.transport.move('repository', 'repository.backup')
3856
backup_transport = self.repo_dir.transport.clone('repository.backup')
3857
repo._format.check_conversion_target(self.target_format)
3858
self.source_repo = repo._format.open(self.repo_dir,
3860
_override_transport=backup_transport)
3861
self.step('Creating new repository')
3862
converted = self.target_format.initialize(self.repo_dir,
3863
self.source_repo.is_shared())
3864
converted.lock_write()
3866
self.step('Copying content into repository.')
3867
self.source_repo.copy_content_into(converted)
3870
self.step('Deleting old repository content.')
3871
self.repo_dir.transport.delete_tree('repository.backup')
3872
self.pb.note('repository converted')
3874
def step(self, message):
3875
"""Update the pb by a step."""
3877
self.pb.update(message, self.count, self.total)
3889
def _unescaper(match, _map=_unescape_map):
3890
code = match.group(1)
3894
if not code.startswith('#'):
3896
return unichr(int(code[1:])).encode('utf8')
3902
def _unescape_xml(data):
3903
"""Unescape predefined XML entities in a string of data."""
3905
if _unescape_re is None:
3906
_unescape_re = re.compile('\&([^;]*);')
3907
return _unescape_re.sub(_unescaper, data)
3910
class _VersionedFileChecker(object):
3912
def __init__(self, repository, text_key_references=None):
3913
self.repository = repository
3914
self.text_index = self.repository._generate_text_key_index(
3915
text_key_references=text_key_references)
3917
def calculate_file_version_parents(self, text_key):
3918
"""Calculate the correct parents for a file version according to
3921
parent_keys = self.text_index[text_key]
3922
if parent_keys == [_mod_revision.NULL_REVISION]:
3924
return tuple(parent_keys)
3926
def check_file_version_parents(self, texts, progress_bar=None):
3927
"""Check the parents stored in a versioned file are correct.
3929
It also detects file versions that are not referenced by their
3930
corresponding revision's inventory.
3932
:returns: A tuple of (wrong_parents, dangling_file_versions).
3933
wrong_parents is a dict mapping {revision_id: (stored_parents,
3934
correct_parents)} for each revision_id where the stored parents
3935
are not correct. dangling_file_versions is a set of (file_id,
3936
revision_id) tuples for versions that are present in this versioned
3937
file, but not used by the corresponding inventory.
3940
self.file_ids = set([file_id for file_id, _ in
3941
self.text_index.iterkeys()])
3942
# text keys is now grouped by file_id
3943
n_weaves = len(self.file_ids)
3944
files_in_revisions = {}
3945
revisions_of_files = {}
3946
n_versions = len(self.text_index)
3947
progress_bar.update('loading text store', 0, n_versions)
3948
parent_map = self.repository.texts.get_parent_map(self.text_index)
3949
# On unlistable transports this could well be empty/error...
3950
text_keys = self.repository.texts.keys()
3951
unused_keys = frozenset(text_keys) - set(self.text_index)
3952
for num, key in enumerate(self.text_index.iterkeys()):
3953
if progress_bar is not None:
3954
progress_bar.update('checking text graph', num, n_versions)
3955
correct_parents = self.calculate_file_version_parents(key)
3957
knit_parents = parent_map[key]
3958
except errors.RevisionNotPresent:
3961
if correct_parents != knit_parents:
3962
wrong_parents[key] = (knit_parents, correct_parents)
3963
return wrong_parents, unused_keys
3966
def _old_get_graph(repository, revision_id):
3967
"""DO NOT USE. That is all. I'm serious."""
3968
graph = repository.get_graph()
3969
revision_graph = dict(((key, value) for key, value in
3970
graph.iter_ancestry([revision_id]) if value is not None))
3971
return _strip_NULL_ghosts(revision_graph)
3974
def _strip_NULL_ghosts(revision_graph):
3975
"""Also don't use this. more compatibility code for unmigrated clients."""
3976
# Filter ghosts, and null:
3977
if _mod_revision.NULL_REVISION in revision_graph:
3978
del revision_graph[_mod_revision.NULL_REVISION]
3979
for key, parents in revision_graph.items():
3980
revision_graph[key] = tuple(parent for parent in parents if parent
3982
return revision_graph
3985
class StreamSink(object):
3986
"""An object that can insert a stream into a repository.
3988
This interface handles the complexity of reserialising inventories and
3989
revisions from different formats, and allows unidirectional insertion into
3990
stacked repositories without looking for the missing basis parents
3994
def __init__(self, target_repo):
3995
self.target_repo = target_repo
3997
def insert_stream(self, stream, src_format, resume_tokens):
3998
"""Insert a stream's content into the target repository.
4000
:param src_format: a bzr repository format.
4002
:return: a list of resume tokens and an iterable of keys additional
4003
items required before the insertion can be completed.
4005
self.target_repo.lock_write()
4008
self.target_repo.resume_write_group(resume_tokens)
4010
self.target_repo.start_write_group()
4012
# locked_insert_stream performs a commit|suspend.
4013
return self._locked_insert_stream(stream, src_format)
4015
self.target_repo.abort_write_group(suppress_errors=True)
4018
self.target_repo.unlock()
4020
def _locked_insert_stream(self, stream, src_format):
4021
to_serializer = self.target_repo._format._serializer
4022
src_serializer = src_format._serializer
4024
if to_serializer == src_serializer:
4025
# If serializers match and the target is a pack repository, set the
4026
# write cache size on the new pack. This avoids poor performance
4027
# on transports where append is unbuffered (such as
4028
# RemoteTransport). This is safe to do because nothing should read
4029
# back from the target repository while a stream with matching
4030
# serialization is being inserted.
4031
# The exception is that a delta record from the source that should
4032
# be a fulltext may need to be expanded by the target (see
4033
# test_fetch_revisions_with_deltas_into_pack); but we take care to
4034
# explicitly flush any buffered writes first in that rare case.
4036
new_pack = self.target_repo._pack_collection._new_pack
4037
except AttributeError:
4038
# Not a pack repository
4041
new_pack.set_write_cache_size(1024*1024)
4042
for substream_type, substream in stream:
4043
if substream_type == 'texts':
4044
self.target_repo.texts.insert_record_stream(substream)
4045
elif substream_type == 'inventories':
4046
if src_serializer == to_serializer:
4047
self.target_repo.inventories.insert_record_stream(
4050
self._extract_and_insert_inventories(
4051
substream, src_serializer)
4052
elif substream_type == 'chk_bytes':
4053
# XXX: This doesn't support conversions, as it assumes the
4054
# conversion was done in the fetch code.
4055
self.target_repo.chk_bytes.insert_record_stream(substream)
4056
elif substream_type == 'revisions':
4057
# This may fallback to extract-and-insert more often than
4058
# required if the serializers are different only in terms of
4060
if src_serializer == to_serializer:
4061
self.target_repo.revisions.insert_record_stream(
4064
self._extract_and_insert_revisions(substream,
4066
elif substream_type == 'signatures':
4067
self.target_repo.signatures.insert_record_stream(substream)
4069
raise AssertionError('kaboom! %s' % (substream_type,))
4070
# Done inserting data, and the missing_keys calculations will try to
4071
# read back from the inserted data, so flush the writes to the new pack
4072
# (if this is pack format).
4073
if new_pack is not None:
4074
new_pack._write_data('', flush=True)
4075
# Find all the new revisions (including ones from resume_tokens)
4076
missing_keys = self.target_repo.get_missing_parent_inventories()
4078
for prefix, versioned_file in (
4079
('texts', self.target_repo.texts),
4080
('inventories', self.target_repo.inventories),
4081
('revisions', self.target_repo.revisions),
4082
('signatures', self.target_repo.signatures),
4084
missing_keys.update((prefix,) + key for key in
4085
versioned_file.get_missing_compression_parent_keys())
4086
except NotImplementedError:
4087
# cannot even attempt suspending, and missing would have failed
4088
# during stream insertion.
4089
missing_keys = set()
4092
# suspend the write group and tell the caller what we is
4093
# missing. We know we can suspend or else we would not have
4094
# entered this code path. (All repositories that can handle
4095
# missing keys can handle suspending a write group).
4096
write_group_tokens = self.target_repo.suspend_write_group()
4097
return write_group_tokens, missing_keys
4098
self.target_repo.commit_write_group()
4101
def _extract_and_insert_inventories(self, substream, serializer):
4102
"""Generate a new inventory versionedfile in target, converting data.
4104
The inventory is retrieved from the source, (deserializing it), and
4105
stored in the target (reserializing it in a different format).
4107
for record in substream:
4108
bytes = record.get_bytes_as('fulltext')
4109
revision_id = record.key[0]
4110
inv = serializer.read_inventory_from_string(bytes, revision_id)
4111
parents = [key[0] for key in record.parents]
4112
self.target_repo.add_inventory(revision_id, inv, parents)
4114
def _extract_and_insert_revisions(self, substream, serializer):
4115
for record in substream:
4116
bytes = record.get_bytes_as('fulltext')
4117
revision_id = record.key[0]
4118
rev = serializer.read_revision_from_string(bytes)
4119
if rev.revision_id != revision_id:
4120
raise AssertionError('wtf: %s != %s' % (rev, revision_id))
4121
self.target_repo.add_revision(revision_id, rev)
4124
if self.target_repo._format._fetch_reconcile:
4125
self.target_repo.reconcile()
4128
class StreamSource(object):
4129
"""A source of a stream for fetching between repositories."""
4131
def __init__(self, from_repository, to_format):
4132
"""Create a StreamSource streaming from from_repository."""
4133
self.from_repository = from_repository
4134
self.to_format = to_format
4136
def delta_on_metadata(self):
4137
"""Return True if delta's are permitted on metadata streams.
4139
That is on revisions and signatures.
4141
src_serializer = self.from_repository._format._serializer
4142
target_serializer = self.to_format._serializer
4143
return (self.to_format._fetch_uses_deltas and
4144
src_serializer == target_serializer)
4146
def _fetch_revision_texts(self, revs):
4147
# fetch signatures first and then the revision texts
4148
# may need to be a InterRevisionStore call here.
4149
from_sf = self.from_repository.signatures
4150
# A missing signature is just skipped.
4151
keys = [(rev_id,) for rev_id in revs]
4152
signatures = versionedfile.filter_absent(from_sf.get_record_stream(
4154
self.to_format._fetch_order,
4155
not self.to_format._fetch_uses_deltas))
4156
# If a revision has a delta, this is actually expanded inside the
4157
# insert_record_stream code now, which is an alternate fix for
4159
from_rf = self.from_repository.revisions
4160
revisions = from_rf.get_record_stream(
4162
self.to_format._fetch_order,
4163
not self.delta_on_metadata())
4164
return [('signatures', signatures), ('revisions', revisions)]
4166
def _generate_root_texts(self, revs):
4167
"""This will be called by __fetch between fetching weave texts and
4168
fetching the inventory weave.
4170
Subclasses should override this if they need to generate root texts
4171
after fetching weave texts.
4173
if self._rich_root_upgrade():
4175
return bzrlib.fetch.Inter1and2Helper(
4176
self.from_repository).generate_root_texts(revs)
4180
def get_stream(self, search):
4182
revs = search.get_keys()
4183
graph = self.from_repository.get_graph()
4184
revs = list(graph.iter_topo_order(revs))
4185
data_to_fetch = self.from_repository.item_keys_introduced_by(revs)
4187
for knit_kind, file_id, revisions in data_to_fetch:
4188
if knit_kind != phase:
4190
# Make a new progress bar for this phase
4191
if knit_kind == "file":
4192
# Accumulate file texts
4193
text_keys.extend([(file_id, revision) for revision in
4195
elif knit_kind == "inventory":
4196
# Now copy the file texts.
4197
from_texts = self.from_repository.texts
4198
yield ('texts', from_texts.get_record_stream(
4199
text_keys, self.to_format._fetch_order,
4200
not self.to_format._fetch_uses_deltas))
4201
# Cause an error if a text occurs after we have done the
4204
# Before we process the inventory we generate the root
4205
# texts (if necessary) so that the inventories references
4207
for _ in self._generate_root_texts(revs):
4209
# NB: This currently reopens the inventory weave in source;
4210
# using a single stream interface instead would avoid this.
4211
from_weave = self.from_repository.inventories
4212
# we fetch only the referenced inventories because we do not
4213
# know for unselected inventories whether all their required
4214
# texts are present in the other repository - it could be
4216
for info in self._get_inventory_stream(revs):
4218
elif knit_kind == "signatures":
4219
# Nothing to do here; this will be taken care of when
4220
# _fetch_revision_texts happens.
4222
elif knit_kind == "revisions":
4223
for record in self._fetch_revision_texts(revs):
4226
raise AssertionError("Unknown knit kind %r" % knit_kind)
4228
def get_stream_for_missing_keys(self, missing_keys):
4229
# missing keys can only occur when we are byte copying and not
4230
# translating (because translation means we don't send
4231
# unreconstructable deltas ever).
4233
keys['texts'] = set()
4234
keys['revisions'] = set()
4235
keys['inventories'] = set()
4236
keys['signatures'] = set()
4237
for key in missing_keys:
4238
keys[key[0]].add(key[1:])
4239
if len(keys['revisions']):
4240
# If we allowed copying revisions at this point, we could end up
4241
# copying a revision without copying its required texts: a
4242
# violation of the requirements for repository integrity.
4243
raise AssertionError(
4244
'cannot copy revisions to fill in missing deltas %s' % (
4245
keys['revisions'],))
4246
for substream_kind, keys in keys.iteritems():
4247
vf = getattr(self.from_repository, substream_kind)
4248
# Ask for full texts always so that we don't need more round trips
4249
# after this stream.
4250
stream = vf.get_record_stream(keys,
4251
self.to_format._fetch_order, True)
4252
yield substream_kind, stream
4254
def inventory_fetch_order(self):
4255
if self._rich_root_upgrade():
4256
return 'topological'
4258
return self.to_format._fetch_order
4260
def _rich_root_upgrade(self):
4261
return (not self.from_repository._format.rich_root_data and
4262
self.to_format.rich_root_data)
4264
def _get_inventory_stream(self, revision_ids):
4265
from_format = self.from_repository._format
4266
if (from_format.supports_chks and self.to_format.supports_chks
4267
and (from_format._serializer == self.to_format._serializer)):
4268
# Both sides support chks, and they use the same serializer, so it
4269
# is safe to transmit the chk pages and inventory pages across
4271
return self._get_chk_inventory_stream(revision_ids)
4272
elif (not from_format.supports_chks):
4273
# Source repository doesn't support chks. So we can transmit the
4274
# inventories 'as-is' and either they are just accepted on the
4275
# target, or the Sink will properly convert it.
4276
return self._get_simple_inventory_stream(revision_ids)
4278
# XXX: Hack to make not-chk->chk fetch: copy the inventories as
4279
# inventories. Note that this should probably be done somehow
4280
# as part of bzrlib.repository.StreamSink. Except JAM couldn't
4281
# figure out how a non-chk repository could possibly handle
4282
# deserializing an inventory stream from a chk repo, as it
4283
# doesn't have a way to understand individual pages.
4284
return self._get_convertable_inventory_stream(revision_ids)
4286
def _get_simple_inventory_stream(self, revision_ids):
4287
from_weave = self.from_repository.inventories
4288
yield ('inventories', from_weave.get_record_stream(
4289
[(rev_id,) for rev_id in revision_ids],
4290
self.inventory_fetch_order(),
4291
not self.delta_on_metadata()))
4293
def _get_chk_inventory_stream(self, revision_ids):
4294
"""Fetch the inventory texts, along with the associated chk maps."""
4295
# We want an inventory outside of the search set, so that we can filter
4296
# out uninteresting chk pages. For now we use
4297
# _find_revision_outside_set, but if we had a Search with cut_revs, we
4298
# could use that instead.
4299
start_rev_id = self.from_repository._find_revision_outside_set(
4301
start_rev_key = (start_rev_id,)
4302
inv_keys_to_fetch = [(rev_id,) for rev_id in revision_ids]
4303
if start_rev_id != _mod_revision.NULL_REVISION:
4304
inv_keys_to_fetch.append((start_rev_id,))
4305
# Any repo that supports chk_bytes must also support out-of-order
4306
# insertion. At least, that is how we expect it to work
4307
# We use get_record_stream instead of iter_inventories because we want
4308
# to be able to insert the stream as well. We could instead fetch
4309
# allowing deltas, and then iter_inventories, but we don't know whether
4310
# source or target is more 'local' anway.
4311
inv_stream = self.from_repository.inventories.get_record_stream(
4312
inv_keys_to_fetch, 'unordered',
4313
True) # We need them as full-texts so we can find their references
4314
uninteresting_chk_roots = set()
4315
interesting_chk_roots = set()
4316
def filter_inv_stream(inv_stream):
4317
for idx, record in enumerate(inv_stream):
4318
### child_pb.update('fetch inv', idx, len(inv_keys_to_fetch))
4319
bytes = record.get_bytes_as('fulltext')
4320
chk_inv = inventory.CHKInventory.deserialise(
4321
self.from_repository.chk_bytes, bytes, record.key)
4322
if record.key == start_rev_key:
4323
uninteresting_chk_roots.add(chk_inv.id_to_entry.key())
4324
p_id_map = chk_inv.parent_id_basename_to_file_id
4325
if p_id_map is not None:
4326
uninteresting_chk_roots.add(p_id_map.key())
4329
interesting_chk_roots.add(chk_inv.id_to_entry.key())
4330
p_id_map = chk_inv.parent_id_basename_to_file_id
4331
if p_id_map is not None:
4332
interesting_chk_roots.add(p_id_map.key())
4333
### pb.update('fetch inventory', 0, 2)
4334
yield ('inventories', filter_inv_stream(inv_stream))
4335
# Now that we have worked out all of the interesting root nodes, grab
4336
# all of the interesting pages and insert them
4337
### pb.update('fetch inventory', 1, 2)
4338
interesting = chk_map.iter_interesting_nodes(
4339
self.from_repository.chk_bytes, interesting_chk_roots,
4340
uninteresting_chk_roots)
4341
def to_stream_adapter():
4342
"""Adapt the iter_interesting_nodes result to a single stream.
4344
iter_interesting_nodes returns records as it processes them, along
4345
with keys. However, we only want to return the records themselves.
4347
for record, items in interesting:
4348
if record is not None:
4350
# XXX: We could instead call get_record_stream(records.keys())
4351
# ATM, this will always insert the records as fulltexts, and
4352
# requires that you can hang on to records once you have gone
4353
# on to the next one. Further, it causes the target to
4354
# recompress the data. Testing shows it to be faster than
4355
# requesting the records again, though.
4356
yield ('chk_bytes', to_stream_adapter())
4357
### pb.update('fetch inventory', 2, 2)
4359
def _get_convertable_inventory_stream(self, revision_ids):
4360
# XXX: One of source or target is using chks, and they don't have
4361
# compatible serializations. The StreamSink code expects to be
4362
# able to convert on the target, so we need to put
4363
# bytes-on-the-wire that can be converted
4364
yield ('inventories', self._stream_invs_as_fulltexts(revision_ids))
4366
def _stream_invs_as_fulltexts(self, revision_ids):
4367
from_repo = self.from_repository
4368
from_serializer = from_repo._format._serializer
4369
revision_keys = [(rev_id,) for rev_id in revision_ids]
4370
parent_map = from_repo.inventories.get_parent_map(revision_keys)
4371
for inv in self.from_repository.iter_inventories(revision_ids):
4372
# XXX: This is a bit hackish, but it works. Basically,
4373
# CHKSerializer 'accidentally' supports
4374
# read/write_inventory_to_string, even though that is never
4375
# the format that is stored on disk. It *does* give us a
4376
# single string representation for an inventory, so live with
4378
# This would be far better if we had a 'serialized inventory
4379
# delta' form. Then we could use 'inventory._make_delta', and
4380
# transmit that. This would both be faster to generate, and
4381
# result in fewer bytes-on-the-wire.
4382
as_bytes = from_serializer.write_inventory_to_string(inv)
4383
key = (inv.revision_id,)
4384
parent_keys = parent_map.get(key, ())
4385
yield versionedfile.FulltextContentFactory(
4386
key, parent_keys, None, as_bytes)
added
removed
bzrlib/repository.py
