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# Copyright (C) 2005-2011 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 __future__ import absolute_import
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from .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 breezy.bundle import serializer
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from breezy.i18n import gettext
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from .decorators import only_raises
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from .inter import InterObject
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from .lock import _RelockDebugMixin, LogicalLockResult
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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 IsInWriteGroupError(errors.InternalBzrError):
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_fmt = "May not refresh_data of repo %(repo)s while in a write group."
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def __init__(self, repo):
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errors.InternalBzrError.__init__(self, repo=repo)
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class CannotSetRevisionId(errors.BzrError):
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_fmt = "Repository format does not support setting revision ids."
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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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# whether this commit builder will automatically update the branch that is
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updates_branch = False
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def __init__(self, repository, parents, config_stack, timestamp=None,
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timezone=None, committer=None, revprops=None,
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revision_id=None, lossy=False):
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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 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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:param lossy: Whether to discard data that can not be natively
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represented, when pushing to a foreign VCS
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self._config_stack = config_stack
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if committer is None:
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self._committer = self._config_stack.get('email')
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elif not isinstance(committer, text_type):
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self._committer = committer.decode() # throw if non-ascii
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self._committer = committer
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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(revision_id)
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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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raise NotImplementedError(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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# TODO(jelmer): Make this repository-format specific
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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 viewitems(revprops):
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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, (text_type, str)):
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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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# TODO(jelmer): Make this repository-format specific
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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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raise NotImplementedError(self.commit)
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"""Abort the commit that is being built.
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raise NotImplementedError(self.abort)
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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
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RevisionTree representing the newly committed tree. This is
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preferred to calling Repository.revision_tree() because that may
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require deserializing the inventory, while we already have a copy in
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raise NotImplementedError(self.revision_tree)
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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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raise NotImplementedError(self.finish_inventory)
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def _generate_revision_if_needed(self, revision_id):
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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 not self.repository._format.supports_setting_revision_ids:
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if revision_id is not None:
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raise CannotSetRevisionId()
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if 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._new_revision_id = revision_id
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self.random_revid = False
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def record_iter_changes(self, tree, basis_revision_id, iter_changes):
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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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:return: A generator of (relpath, fs_hash) tuples for use with
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raise NotImplementedError(self.record_iter_changes)
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class RepositoryWriteLockResult(LogicalLockResult):
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"""The result of write locking a repository.
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:ivar repository_token: The token obtained from the underlying lock, or
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:ivar unlock: A callable which will unlock the lock.
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def __init__(self, unlock, repository_token):
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LogicalLockResult.__init__(self, unlock)
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self.repository_token = repository_token
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return "RepositoryWriteLockResult(%s, %s)" % (self.repository_token,
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######################################################################
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class Repository(controldir.ControlComponent, _RelockDebugMixin):
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"""Repository holding history for one or more branches.
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The repository holds and retrieves historical information including
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revisions and file history. It's normally accessed only by the Branch,
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which views a particular line of development through that history.
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See VersionedFileRepository in breezy.vf_repository for the
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base class for most Bazaar repositories.
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# Does this repository implementation support random access to
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# items in the tree, or just bulk fetching/pushing of data?
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supports_random_access = True
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def abort_write_group(self, suppress_errors=False):
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"""Commit the contents accrued within the current write group.
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:param suppress_errors: if true, abort_write_group will catch and log
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unexpected errors that happen during the abort, rather than
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allowing them to propagate. Defaults to False.
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:seealso: start_write_group.
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if self._write_group is not self.get_transaction():
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# has an unlock or relock occured ?
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'(suppressed) mismatched lock context and write group. %r, %r',
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self._write_group, self.get_transaction())
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raise errors.BzrError(
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'mismatched lock context and write group. %r, %r' %
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(self._write_group, self.get_transaction()))
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self._abort_write_group()
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except Exception as exc:
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self._write_group = None
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if not suppress_errors:
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mutter('abort_write_group failed')
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log_exception_quietly()
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note(gettext('brz: ERROR (ignored): %s'), exc)
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self._write_group = None
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def _abort_write_group(self):
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"""Template method for per-repository write group cleanup.
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This is called during abort before the write group is considered to be
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finished and should cleanup any internal state accrued during the write
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group. There is no requirement that data handed to the repository be
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*not* made available - this is not a rollback - but neither should any
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attempt be made to ensure that data added is fully commited. Abort is
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invoked when an error has occured so futher disk or network operations
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may not be possible or may error and if possible should not be
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def add_fallback_repository(self, repository):
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"""Add a repository to use for looking up data not held locally.
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:param repository: A repository.
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raise NotImplementedError(self.add_fallback_repository)
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def _check_fallback_repository(self, repository):
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"""Check that this repository can fallback to repository safely.
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Raise an error if not.
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:param repository: A repository to fallback to.
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return InterRepository._assert_same_model(self, repository)
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def all_revision_ids(self):
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"""Returns a list of all the revision ids in the repository.
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This is conceptually deprecated because code should generally work on
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the graph reachable from a particular revision, and ignore any other
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revisions that might be present. There is no direct replacement
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if 'evil' in debug.debug_flags:
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mutter_callsite(2, "all_revision_ids is linear with history.")
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return self._all_revision_ids()
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def _all_revision_ids(self):
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"""Returns a list of all the revision ids in the repository.
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These are in as much topological order as the underlying store can
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raise NotImplementedError(self._all_revision_ids)
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def break_lock(self):
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"""Break a lock if one is present from another instance.
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Uses the ui factory to ask for confirmation if the lock may be from
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self.control_files.break_lock()
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def create(controldir):
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"""Construct the current default format repository in controldir."""
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return RepositoryFormat.get_default_format().initialize(controldir)
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def __init__(self, _format, controldir, control_files):
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"""instantiate a Repository.
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:param _format: The format of the repository on disk.
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:param controldir: The ControlDir of the repository.
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:param control_files: Control files to use for locking, etc.
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# In the future we will have a single api for all stores for
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# getting file texts, inventories and revisions, then
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# this construct will accept instances of those things.
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super(Repository, self).__init__()
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self._format = _format
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# the following are part of the public API for Repository:
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self.controldir = controldir
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self.control_files = control_files
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self._write_group = None
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# Additional places to query for data.
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self._fallback_repositories = []
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def user_transport(self):
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return self.controldir.user_transport
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def control_transport(self):
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return self._transport
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if self._fallback_repositories:
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return '%s(%r, fallback_repositories=%r)' % (
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self.__class__.__name__,
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self._fallback_repositories)
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return '%s(%r)' % (self.__class__.__name__,
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def _has_same_fallbacks(self, other_repo):
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"""Returns true if the repositories have the same fallbacks."""
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my_fb = self._fallback_repositories
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other_fb = other_repo._fallback_repositories
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if len(my_fb) != len(other_fb):
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for f, g in zip(my_fb, other_fb):
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if not f.has_same_location(g):
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def has_same_location(self, other):
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"""Returns a boolean indicating if this repository is at the same
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location as another repository.
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This might return False even when two repository objects are accessing
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the same physical repository via different URLs.
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if self.__class__ is not other.__class__:
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return (self.control_url == other.control_url)
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def is_in_write_group(self):
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"""Return True if there is an open write group.
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:seealso: start_write_group.
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return self._write_group is not None
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return self.control_files.is_locked()
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def is_write_locked(self):
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"""Return True if this object is write locked."""
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return self.is_locked() and self.control_files._lock_mode == 'w'
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def lock_write(self, token=None):
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"""Lock this repository for writing.
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This causes caching within the repository obejct to start accumlating
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data during reads, and allows a 'write_group' to be obtained. Write
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groups must be used for actual data insertion.
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A token should be passed in if you know that you have locked the object
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some other way, and need to synchronise this object's state with that
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XXX: this docstring is duplicated in many places, e.g. lockable_files.py
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:param token: if this is already locked, then lock_write will fail
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unless the token matches the existing lock.
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:returns: a token if this instance supports tokens, otherwise None.
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:raises TokenLockingNotSupported: when a token is given but this
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instance doesn't support using token locks.
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:raises MismatchedToken: if the specified token doesn't match the token
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of the existing lock.
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:seealso: start_write_group.
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:return: A RepositoryWriteLockResult.
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locked = self.is_locked()
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token = self.control_files.lock_write(token=token)
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self._warn_if_deprecated()
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for repo in self._fallback_repositories:
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# Writes don't affect fallback repos
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return RepositoryWriteLockResult(self.unlock, token)
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"""Lock the repository for read operations.
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:return: An object with an unlock method which will release the lock
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locked = self.is_locked()
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self.control_files.lock_read()
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self._warn_if_deprecated()
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for repo in self._fallback_repositories:
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return LogicalLockResult(self.unlock)
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def get_physical_lock_status(self):
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return self.control_files.get_physical_lock_status()
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def leave_lock_in_place(self):
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"""Tell this repository not to release the physical lock when this
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If lock_write doesn't return a token, then this method is not supported.
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self.control_files.leave_in_place()
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def dont_leave_lock_in_place(self):
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"""Tell this repository to release the physical lock when this
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object is unlocked, even if it didn't originally acquire it.
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If lock_write doesn't return a token, then this method is not supported.
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self.control_files.dont_leave_in_place()
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def gather_stats(self, revid=None, committers=None):
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"""Gather statistics from a revision id.
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:param revid: The revision id to gather statistics from, if None, then
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no revision specific statistics are gathered.
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:param committers: Optional parameter controlling whether to grab
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a count of committers from the revision specific statistics.
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:return: A dictionary of statistics. Currently this contains:
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committers: The number of committers if requested.
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firstrev: A tuple with timestamp, timezone for the penultimate left
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most ancestor of revid, if revid is not the NULL_REVISION.
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latestrev: A tuple with timestamp, timezone for revid, if revid is
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not the NULL_REVISION.
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revisions: The total revision count in the repository.
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size: An estimate disk size of the repository in bytes.
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with self.lock_read():
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if revid and committers:
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result['committers'] = 0
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if revid and revid != _mod_revision.NULL_REVISION:
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graph = self.get_graph()
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all_committers = set()
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revisions = [r for (r, p) in graph.iter_ancestry([revid])
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if r != _mod_revision.NULL_REVISION]
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# ignore the revisions in the middle - just grab first and last
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revisions = revisions[0], revisions[-1]
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for revision in self.get_revisions(revisions):
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if not last_revision:
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last_revision = revision
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all_committers.add(revision.committer)
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first_revision = revision
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result['committers'] = len(all_committers)
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result['firstrev'] = (first_revision.timestamp,
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first_revision.timezone)
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result['latestrev'] = (last_revision.timestamp,
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last_revision.timezone)
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def find_branches(self, using=False):
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"""Find branches underneath this repository.
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This will include branches inside other branches.
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:param using: If True, list only branches using this repository.
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if using and not self.is_shared():
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return self.controldir.list_branches()
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class Evaluator(object):
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self.first_call = True
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def __call__(self, controldir):
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# On the first call, the parameter is always the controldir
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# containing the current repo.
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if not self.first_call:
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repository = controldir.open_repository()
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except errors.NoRepositoryPresent:
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return False, ([], repository)
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self.first_call = False
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value = (controldir.list_branches(), None)
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for branches, repository in controldir.ControlDir.find_controldirs(
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self.user_transport, evaluate=Evaluator()):
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if branches is not None:
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if not using and repository is not None:
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ret.extend(repository.find_branches())
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def search_missing_revision_ids(self, other,
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find_ghosts=True, revision_ids=None, if_present_ids=None,
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"""Return the revision ids that other has that this does not.
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These are returned in topological order.
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revision_ids: only return revision ids included by revision_id.
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with self.lock_read():
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return InterRepository.get(other, self).search_missing_revision_ids(
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find_ghosts=find_ghosts, revision_ids=revision_ids,
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if_present_ids=if_present_ids, limit=limit)
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"""Open the repository rooted at base.
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For instance, if the repository is at URL/.bzr/repository,
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Repository.open(URL) -> a Repository instance.
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control = controldir.ControlDir.open(base)
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return control.open_repository()
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def copy_content_into(self, destination, revision_id=None):
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"""Make a complete copy of the content in self into destination.
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This is a destructive operation! Do not use it on existing
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return InterRepository.get(self, destination).copy_content(revision_id)
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def commit_write_group(self):
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"""Commit the contents accrued within the current write group.
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:seealso: start_write_group.
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:return: it may return an opaque hint that can be passed to 'pack'.
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if self._write_group is not self.get_transaction():
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# has an unlock or relock occured ?
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raise errors.BzrError('mismatched lock context %r and '
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(self.get_transaction(), self._write_group))
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result = self._commit_write_group()
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self._write_group = None
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def _commit_write_group(self):
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"""Template method for per-repository write group cleanup.
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This is called before the write group is considered to be
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finished and should ensure that all data handed to the repository
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for writing during the write group is safely committed (to the
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extent possible considering file system caching etc).
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def suspend_write_group(self):
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"""Suspend a write group.
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:raise UnsuspendableWriteGroup: If the write group can not be
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:return: List of tokens
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raise errors.UnsuspendableWriteGroup(self)
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def refresh_data(self):
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"""Re-read any data needed to synchronise with disk.
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This method is intended to be called after another repository instance
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(such as one used by a smart server) has inserted data into the
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repository. On all repositories this will work outside of write groups.
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Some repository formats (pack and newer for breezy native formats)
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support refresh_data inside write groups. If called inside a write
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group on a repository that does not support refreshing in a write group
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IsInWriteGroupError will be raised.
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def resume_write_group(self, tokens):
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if not self.is_write_locked():
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raise errors.NotWriteLocked(self)
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if self._write_group:
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raise errors.BzrError('already in a write group')
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self._resume_write_group(tokens)
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# so we can detect unlock/relock - the write group is now entered.
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self._write_group = self.get_transaction()
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def _resume_write_group(self, tokens):
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raise errors.UnsuspendableWriteGroup(self)
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def fetch(self, source, revision_id=None, find_ghosts=False):
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"""Fetch the content required to construct revision_id from source.
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If revision_id is None, then all content is copied.
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fetch() may not be used when the repository is in a write group -
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either finish the current write group before using fetch, or use
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fetch before starting the write group.
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:param find_ghosts: Find and copy revisions in the source that are
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ghosts in the target (and not reachable directly by walking out to
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the first-present revision in target from revision_id).
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:param revision_id: If specified, all the content needed for this
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revision ID will be copied to the target. Fetch will determine for
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itself which content needs to be copied.
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if self.is_in_write_group():
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raise errors.InternalBzrError(
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"May not fetch while in a write group.")
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# fast path same-url fetch operations
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# TODO: lift out to somewhere common with RemoteRepository
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# <https://bugs.launchpad.net/bzr/+bug/401646>
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if (self.has_same_location(source)
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and self._has_same_fallbacks(source)):
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# check that last_revision is in 'from' and then return a
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if (revision_id is not None and
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not _mod_revision.is_null(revision_id)):
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self.get_revision(revision_id)
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inter = InterRepository.get(source, self)
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return inter.fetch(revision_id=revision_id, find_ghosts=find_ghosts)
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def create_bundle(self, target, base, fileobj, format=None):
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return serializer.write_bundle(self, target, base, fileobj, format)
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def get_commit_builder(self, branch, parents, config_stack, timestamp=None,
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timezone=None, committer=None, revprops=None,
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revision_id=None, lossy=False):
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"""Obtain a CommitBuilder for this repository.
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:param branch: Branch to commit to.
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:param parents: Revision ids of the parents of the new revision.
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:param config_stack: Configuration stack 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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:param lossy: Whether to discard data that can not be natively
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represented, when pushing to a foreign VCS
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raise NotImplementedError(self.get_commit_builder)
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@only_raises(errors.LockNotHeld, errors.LockBroken)
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if (self.control_files._lock_count == 1 and
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self.control_files._lock_mode == 'w'):
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if self._write_group is not None:
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self.abort_write_group()
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self.control_files.unlock()
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raise errors.BzrError(
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'Must end write groups before releasing write locks.')
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self.control_files.unlock()
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if self.control_files._lock_count == 0:
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for repo in self._fallback_repositories:
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def clone(self, controldir, revision_id=None):
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"""Clone this repository into controldir using the current format.
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Currently no check is made that the format of this repository and
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the bzrdir format are compatible. FIXME RBC 20060201.
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:return: The newly created destination repository.
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with self.lock_read():
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# TODO: deprecate after 0.16; cloning this with all its settings is
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# probably not very useful -- mbp 20070423
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dest_repo = self._create_sprouting_repo(
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controldir, shared=self.is_shared())
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self.copy_content_into(dest_repo, revision_id)
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def start_write_group(self):
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"""Start a write group in the repository.
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Write groups are used by repositories which do not have a 1:1 mapping
754
between file ids and backend store to manage the insertion of data from
755
both fetch and commit operations.
757
A write lock is required around the
758
start_write_group/commit_write_group for the support of lock-requiring
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One can only insert data into a repository inside a write group.
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if not self.is_write_locked():
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raise errors.NotWriteLocked(self)
767
if self._write_group:
768
raise errors.BzrError('already in a write group')
769
self._start_write_group()
770
# so we can detect unlock/relock - the write group is now entered.
771
self._write_group = self.get_transaction()
773
def _start_write_group(self):
774
"""Template method for per-repository write group startup.
776
This is called before the write group is considered to be
780
def sprout(self, to_bzrdir, revision_id=None):
781
"""Create a descendent repository for new development.
783
Unlike clone, this does not copy the settings of the repository.
785
with self.lock_read():
786
dest_repo = self._create_sprouting_repo(to_bzrdir, shared=False)
787
dest_repo.fetch(self, revision_id=revision_id)
790
def _create_sprouting_repo(self, a_controldir, shared):
792
a_controldir._format, self.controldir._format.__class__):
793
# use target default format.
794
dest_repo = a_controldir.create_repository()
796
# Most control formats need the repository to be specifically
797
# created, but on some old all-in-one formats it's not needed
799
dest_repo = self._format.initialize(
800
a_controldir, shared=shared)
801
except errors.UninitializableFormat:
802
dest_repo = a_controldir.open_repository()
805
def has_revision(self, revision_id):
806
"""True if this repository has a copy of the revision."""
807
with self.lock_read():
808
return revision_id in self.has_revisions((revision_id,))
810
def has_revisions(self, revision_ids):
811
"""Probe to find out the presence of multiple revisions.
813
:param revision_ids: An iterable of revision_ids.
814
:return: A set of the revision_ids that were present.
816
raise NotImplementedError(self.has_revisions)
818
def get_revision(self, revision_id):
819
"""Return the Revision object for a named revision."""
820
with self.lock_read():
821
return self.get_revisions([revision_id])[0]
823
def get_revision_reconcile(self, revision_id):
824
"""'reconcile' helper routine that allows access to a revision always.
826
This variant of get_revision does not cross check the weave graph
827
against the revision one as get_revision does: but it should only
828
be used by reconcile, or reconcile-alike commands that are correcting
829
or testing the revision graph.
831
raise NotImplementedError(self.get_revision_reconcile)
833
def get_revisions(self, revision_ids):
834
"""Get many revisions at once.
836
Repositories that need to check data on every revision read should
837
subclass this method.
840
for revid, rev in self.iter_revisions(revision_ids):
842
raise errors.NoSuchRevision(self, revid)
844
return [revs[revid] for revid in revision_ids]
846
def iter_revisions(self, revision_ids):
847
"""Iterate over revision objects.
849
:param revision_ids: An iterable of revisions to examine. None may be
850
passed to request all revisions known to the repository. Note that
851
not all repositories can find unreferenced revisions; for those
852
repositories only referenced ones will be returned.
853
:return: An iterator of (revid, revision) tuples. Absent revisions (
854
those asked for but not available) are returned as (revid, None).
855
N.B.: Revisions are not necessarily yielded in order.
857
raise NotImplementedError(self.iter_revisions)
859
def get_deltas_for_revisions(self, revisions, specific_fileids=None):
860
"""Produce a generator of revision deltas.
862
Note that the input is a sequence of REVISIONS, not revision_ids.
863
Trees will be held in memory until the generator exits.
864
Each delta is relative to the revision's lefthand predecessor.
866
:param specific_fileids: if not None, the result is filtered
867
so that only those file-ids, their parents and their
868
children are included.
870
raise NotImplementedError(self.get_deltas_for_revisions)
872
def get_revision_delta(self, revision_id, specific_fileids=None):
873
"""Return the delta for one revision.
875
The delta is relative to the left-hand predecessor of the
878
:param specific_fileids: if not None, the result is filtered
879
so that only those file-ids, their parents and their
880
children are included.
882
with self.lock_read():
883
r = self.get_revision(revision_id)
884
return list(self.get_deltas_for_revisions(
885
[r], specific_fileids=specific_fileids))[0]
887
def store_revision_signature(self, gpg_strategy, plaintext, revision_id):
888
raise NotImplementedError(self.store_revision_signature)
890
def add_signature_text(self, revision_id, signature):
891
"""Store a signature text for a revision.
893
:param revision_id: Revision id of the revision
894
:param signature: Signature text.
896
raise NotImplementedError(self.add_signature_text)
898
def iter_files_bytes(self, desired_files):
899
"""Iterate through file versions.
901
Files will not necessarily be returned in the order they occur in
902
desired_files. No specific order is guaranteed.
904
Yields pairs of identifier, bytes_iterator. identifier is an opaque
905
value supplied by the caller as part of desired_files. It should
906
uniquely identify the file version in the caller's context. (Examples:
907
an index number or a TreeTransform trans_id.)
909
:param desired_files: a list of (file_id, revision_id, identifier)
912
raise NotImplementedError(self.iter_files_bytes)
914
def get_rev_id_for_revno(self, revno, known_pair):
915
"""Return the revision id of a revno, given a later (revno, revid)
916
pair in the same history.
918
:return: if found (True, revid). If the available history ran out
919
before reaching the revno, then this returns
920
(False, (closest_revno, closest_revid)).
922
known_revno, known_revid = known_pair
923
partial_history = [known_revid]
924
distance_from_known = known_revno - revno
925
if distance_from_known < 0:
926
raise errors.RevnoOutOfBounds(revno, (0, known_revno))
929
self, partial_history, stop_index=distance_from_known)
930
except errors.RevisionNotPresent as err:
931
if err.revision_id == known_revid:
932
# The start revision (known_revid) wasn't found.
933
raise errors.NoSuchRevision(self, known_revid)
934
# This is a stacked repository with no fallbacks, or a there's a
935
# left-hand ghost. Either way, even though the revision named in
936
# the error isn't in this repo, we know it's the next step in this
938
partial_history.append(err.revision_id)
939
if len(partial_history) <= distance_from_known:
940
# Didn't find enough history to get a revid for the revno.
941
earliest_revno = known_revno - len(partial_history) + 1
942
return (False, (earliest_revno, partial_history[-1]))
943
if len(partial_history) - 1 > distance_from_known:
944
raise AssertionError('_iter_for_revno returned too much history')
945
return (True, partial_history[-1])
948
"""Return True if this repository is flagged as a shared repository."""
949
raise NotImplementedError(self.is_shared)
951
def reconcile(self, other=None, thorough=False):
952
"""Reconcile this repository."""
953
raise NotImplementedError(self.reconcile)
955
def _refresh_data(self):
956
"""Helper called from lock_* to ensure coherency with disk.
958
The default implementation does nothing; it is however possible
959
for repositories to maintain loaded indices across multiple locks
960
by checking inside their implementation of this method to see
961
whether their indices are still valid. This depends of course on
962
the disk format being validatable in this manner. This method is
963
also called by the refresh_data() public interface to cause a refresh
964
to occur while in a write lock so that data inserted by a smart server
965
push operation is visible on the client's instance of the physical
969
def revision_tree(self, revision_id):
970
"""Return Tree for a revision on this branch.
972
`revision_id` may be NULL_REVISION for the empty tree revision.
974
raise NotImplementedError(self.revision_tree)
976
def revision_trees(self, revision_ids):
977
"""Return Trees for revisions in this repository.
979
:param revision_ids: a sequence of revision-ids;
980
a revision-id may not be None or b'null:'
982
raise NotImplementedError(self.revision_trees)
984
def pack(self, hint=None, clean_obsolete_packs=False):
985
"""Compress the data within the repository.
987
This operation only makes sense for some repository types. For other
988
types it should be a no-op that just returns.
990
This stub method does not require a lock, but subclasses should use
991
self.write_lock as this is a long running call it's reasonable to
992
implicitly lock for the user.
994
:param hint: If not supplied, the whole repository is packed.
995
If supplied, the repository may use the hint parameter as a
996
hint for the parts of the repository to pack. A hint can be
997
obtained from the result of commit_write_group(). Out of
998
date hints are simply ignored, because concurrent operations
999
can obsolete them rapidly.
1001
:param clean_obsolete_packs: Clean obsolete packs immediately after
1005
def get_transaction(self):
1006
return self.control_files.get_transaction()
1008
def get_parent_map(self, revision_ids):
1009
"""See graph.StackedParentsProvider.get_parent_map"""
1010
raise NotImplementedError(self.get_parent_map)
1012
def _get_parent_map_no_fallbacks(self, revision_ids):
1013
"""Same as Repository.get_parent_map except doesn't query fallbacks."""
1014
# revisions index works in keys; this just works in revisions
1015
# therefore wrap and unwrap
1018
for revision_id in revision_ids:
1019
if revision_id == _mod_revision.NULL_REVISION:
1020
result[revision_id] = ()
1021
elif revision_id is None:
1022
raise ValueError('get_parent_map(None) is not valid')
1024
query_keys.append((revision_id,))
1025
vf = self.revisions.without_fallbacks()
1026
for (revision_id,), parent_keys in viewitems(
1027
vf.get_parent_map(query_keys)):
1029
result[revision_id] = tuple([parent_revid
1030
for (parent_revid,) in parent_keys])
1032
result[revision_id] = (_mod_revision.NULL_REVISION,)
1035
def _make_parents_provider(self):
1036
if not self._format.supports_external_lookups:
1038
return graph.StackedParentsProvider(_LazyListJoin(
1039
[self._make_parents_provider_unstacked()],
1040
self._fallback_repositories))
1042
def _make_parents_provider_unstacked(self):
1043
return graph.CallableToParentsProviderAdapter(
1044
self._get_parent_map_no_fallbacks)
1046
def get_known_graph_ancestry(self, revision_ids):
1047
"""Return the known graph for a set of revision ids and their ancestors.
1049
raise NotImplementedError(self.get_known_graph_ancestry)
1051
def get_file_graph(self):
1052
"""Return the graph walker for files."""
1053
raise NotImplementedError(self.get_file_graph)
1055
def get_graph(self, other_repository=None):
1056
"""Return the graph walker for this repository format"""
1057
parents_provider = self._make_parents_provider()
1058
if (other_repository is not None and
1059
not self.has_same_location(other_repository)):
1060
parents_provider = graph.StackedParentsProvider(
1061
[parents_provider, other_repository._make_parents_provider()])
1062
return graph.Graph(parents_provider)
1064
def set_make_working_trees(self, new_value):
1065
"""Set the policy flag for making working trees when creating branches.
1067
This only applies to branches that use this repository.
1069
The default is 'True'.
1070
:param new_value: True to restore the default, False to disable making
1073
raise NotImplementedError(self.set_make_working_trees)
1075
def make_working_trees(self):
1076
"""Returns the policy for making working trees on new branches."""
1077
raise NotImplementedError(self.make_working_trees)
1079
def sign_revision(self, revision_id, gpg_strategy):
1080
raise NotImplementedError(self.sign_revision)
1082
def verify_revision_signature(self, revision_id, gpg_strategy):
1083
"""Verify the signature on a revision.
1085
:param revision_id: the revision to verify
1086
:gpg_strategy: the GPGStrategy object to used
1088
:return: gpg.SIGNATURE_VALID or a failed SIGNATURE_ value
1090
raise NotImplementedError(self.verify_revision_signature)
1092
def verify_revision_signatures(self, revision_ids, gpg_strategy):
1093
"""Verify revision signatures for a number of revisions.
1095
:param revision_id: the revision to verify
1096
:gpg_strategy: the GPGStrategy object to used
1097
:return: Iterator over tuples with revision id, result and keys
1099
with self.lock_read():
1100
for revid in revision_ids:
1101
(result, key) = self.verify_revision_signature(revid, gpg_strategy)
1102
yield revid, result, key
1104
def has_signature_for_revision_id(self, revision_id):
1105
"""Query for a revision signature for revision_id in the repository."""
1106
raise NotImplementedError(self.has_signature_for_revision_id)
1108
def get_signature_text(self, revision_id):
1109
"""Return the text for a signature."""
1110
raise NotImplementedError(self.get_signature_text)
1112
def check(self, revision_ids=None, callback_refs=None, check_repo=True):
1113
"""Check consistency of all history of given revision_ids.
1115
Different repository implementations should override _check().
1117
:param revision_ids: A non-empty list of revision_ids whose ancestry
1118
will be checked. Typically the last revision_id of a branch.
1119
:param callback_refs: A dict of check-refs to resolve and callback
1120
the check/_check method on the items listed as wanting the ref.
1122
:param check_repo: If False do not check the repository contents, just
1123
calculate the data callback_refs requires and call them back.
1125
return self._check(revision_ids=revision_ids, callback_refs=callback_refs,
1126
check_repo=check_repo)
1128
def _check(self, revision_ids=None, callback_refs=None, check_repo=True):
1129
raise NotImplementedError(self.check)
1131
def _warn_if_deprecated(self, branch=None):
1132
if not self._format.is_deprecated():
1134
global _deprecation_warning_done
1135
if _deprecation_warning_done:
1139
conf = config.GlobalStack()
1141
conf = branch.get_config_stack()
1142
if 'format_deprecation' in conf.get('suppress_warnings'):
1144
warning("Format %s for %s is deprecated -"
1145
" please use 'brz upgrade' to get better performance"
1146
% (self._format, self.controldir.transport.base))
1148
_deprecation_warning_done = True
1150
def supports_rich_root(self):
1151
return self._format.rich_root_data
1153
def _check_ascii_revisionid(self, revision_id, method):
1154
"""Private helper for ascii-only repositories."""
1155
# weave repositories refuse to store revisionids that are non-ascii.
1156
if revision_id is not None:
1157
# weaves require ascii revision ids.
1158
if isinstance(revision_id, text_type):
1160
revision_id.encode('ascii')
1161
except UnicodeEncodeError:
1162
raise errors.NonAsciiRevisionId(method, self)
1165
revision_id.decode('ascii')
1166
except UnicodeDecodeError:
1167
raise errors.NonAsciiRevisionId(method, self)
1170
class RepositoryFormatRegistry(controldir.ControlComponentFormatRegistry):
1171
"""Repository format registry."""
1173
def get_default(self):
1174
"""Return the current default format."""
1175
return controldir.format_registry.make_controldir('default').repository_format
1178
network_format_registry = registry.FormatRegistry()
1179
"""Registry of formats indexed by their network name.
1181
The network name for a repository format is an identifier that can be used when
1182
referring to formats with smart server operations. See
1183
RepositoryFormat.network_name() for more detail.
1187
format_registry = RepositoryFormatRegistry(network_format_registry)
1188
"""Registry of formats, indexed by their BzrDirMetaFormat format string.
1190
This can contain either format instances themselves, or classes/factories that
1191
can be called to obtain one.
1195
#####################################################################
1196
# Repository Formats
1198
class RepositoryFormat(controldir.ControlComponentFormat):
1199
"""A repository format.
1201
Formats provide four things:
1202
* An initialization routine to construct repository data on disk.
1203
* a optional format string which is used when the BzrDir supports
1205
* an open routine which returns a Repository instance.
1206
* A network name for referring to the format in smart server RPC
1209
There is one and only one Format subclass for each on-disk format. But
1210
there can be one Repository subclass that is used for several different
1211
formats. The _format attribute on a Repository instance can be used to
1212
determine the disk format.
1214
Formats are placed in a registry by their format string for reference
1215
during opening. These should be subclasses of RepositoryFormat for
1218
Once a format is deprecated, just deprecate the initialize and open
1219
methods on the format class. Do not deprecate the object, as the
1220
object may be created even when a repository instance hasn't been
1223
Common instance attributes:
1224
_matchingcontroldir - the controldir format that the repository format was
1225
originally written to work with. This can be used if manually
1226
constructing a bzrdir and repository, or more commonly for test suite
1230
# Set to True or False in derived classes. True indicates that the format
1231
# supports ghosts gracefully.
1232
supports_ghosts = None
1233
# Can this repository be given external locations to lookup additional
1234
# data. Set to True or False in derived classes.
1235
supports_external_lookups = None
1236
# Does this format support CHK bytestring lookups. Set to True or False in
1238
supports_chks = None
1239
# Should fetch trigger a reconcile after the fetch? Only needed for
1240
# some repository formats that can suffer internal inconsistencies.
1241
_fetch_reconcile = False
1242
# Does this format have < O(tree_size) delta generation. Used to hint what
1243
# code path for commit, amongst other things.
1245
# Does doing a pack operation compress data? Useful for the pack UI command
1246
# (so if there is one pack, the operation can still proceed because it may
1247
# help), and for fetching when data won't have come from the same
1249
pack_compresses = False
1250
# Does the repository storage understand references to trees?
1251
supports_tree_reference = None
1252
# Is the format experimental ?
1253
experimental = False
1254
# Does this repository format escape funky characters, or does it create
1255
# files with similar names as the versioned files in its contents on disk
1257
supports_funky_characters = None
1258
# Does this repository format support leaving locks?
1259
supports_leaving_lock = None
1260
# Does this format support the full VersionedFiles interface?
1261
supports_full_versioned_files = None
1262
# Does this format support signing revision signatures?
1263
supports_revision_signatures = True
1264
# Can the revision graph have incorrect parents?
1265
revision_graph_can_have_wrong_parents = None
1266
# Does this format support setting revision ids?
1267
supports_setting_revision_ids = True
1268
# Does this format support rich root data?
1269
rich_root_data = None
1270
# Does this format support explicitly versioned directories?
1271
supports_versioned_directories = None
1272
# Can other repositories be nested into one of this format?
1273
supports_nesting_repositories = None
1274
# Is it possible for revisions to be present without being referenced
1276
supports_unreferenced_revisions = None
1277
# Does this format store the current Branch.nick in a revision when
1279
supports_storing_branch_nick = True
1280
# Does the format support overriding the transport to use
1281
supports_overriding_transport = True
1282
# Does the format support setting custom revision properties?
1283
supports_custom_revision_properties = True
1284
# Does the format record per-file revision metadata?
1285
records_per_file_revision = True
1288
return "%s()" % self.__class__.__name__
1290
def __eq__(self, other):
1291
# format objects are generally stateless
1292
return isinstance(other, self.__class__)
1294
def __ne__(self, other):
1295
return not self == other
1297
def get_format_description(self):
1298
"""Return the short description for this format."""
1299
raise NotImplementedError(self.get_format_description)
1301
def initialize(self, controldir, shared=False):
1302
"""Initialize a repository of this format in controldir.
1304
:param controldir: The controldir to put the new repository in it.
1305
:param shared: The repository should be initialized as a sharable one.
1306
:returns: The new repository object.
1308
This may raise UninitializableFormat if shared repository are not
1309
compatible the controldir.
1311
raise NotImplementedError(self.initialize)
1313
def is_supported(self):
1314
"""Is this format supported?
1316
Supported formats must be initializable and openable.
1317
Unsupported formats may not support initialization or committing or
1318
some other features depending on the reason for not being supported.
1322
def is_deprecated(self):
1323
"""Is this format deprecated?
1325
Deprecated formats may trigger a user-visible warning recommending
1326
the user to upgrade. They are still fully supported.
1330
def network_name(self):
1331
"""A simple byte string uniquely identifying this format for RPC calls.
1333
MetaDir repository formats use their disk format string to identify the
1334
repository over the wire. All in one formats such as bzr < 0.8, and
1335
foreign formats like svn/git and hg should use some marker which is
1336
unique and immutable.
1338
raise NotImplementedError(self.network_name)
1340
def check_conversion_target(self, target_format):
1341
if self.rich_root_data and not target_format.rich_root_data:
1342
raise errors.BadConversionTarget(
1343
'Does not support rich root data.', target_format,
1345
if (self.supports_tree_reference
1346
and not getattr(target_format, 'supports_tree_reference', False)):
1347
raise errors.BadConversionTarget(
1348
'Does not support nested trees', target_format,
1351
def open(self, controldir, _found=False):
1352
"""Return an instance of this format for a controldir.
1354
_found is a private parameter, do not use it.
1356
raise NotImplementedError(self.open)
1358
def _run_post_repo_init_hooks(self, repository, controldir, shared):
1359
from .controldir import ControlDir, RepoInitHookParams
1360
hooks = ControlDir.hooks['post_repo_init']
1363
params = RepoInitHookParams(repository, self, controldir, shared)
1368
# formats which have no format string are not discoverable or independently
1369
# creatable on disk, so are not registered in format_registry. They're
1370
# all in breezy.bzr.knitreponow. When an instance of one of these is
1371
# needed, it's constructed directly by the ControlDir. Non-native formats where
1372
# the repository is not separately opened are similar.
1374
format_registry.register_lazy(
1375
b'Bazaar-NG Knit Repository Format 1',
1376
'breezy.bzr.knitrepo',
1377
'RepositoryFormatKnit1',
1380
format_registry.register_lazy(
1381
b'Bazaar Knit Repository Format 3 (bzr 0.15)\n',
1382
'breezy.bzr.knitrepo',
1383
'RepositoryFormatKnit3',
1386
format_registry.register_lazy(
1387
b'Bazaar Knit Repository Format 4 (bzr 1.0)\n',
1388
'breezy.bzr.knitrepo',
1389
'RepositoryFormatKnit4',
1392
# Pack-based formats. There is one format for pre-subtrees, and one for
1393
# post-subtrees to allow ease of testing.
1394
# NOTE: These are experimental in 0.92. Stable in 1.0 and above
1395
format_registry.register_lazy(
1396
b'Bazaar pack repository format 1 (needs bzr 0.92)\n',
1397
'breezy.bzr.knitpack_repo',
1398
'RepositoryFormatKnitPack1',
1400
format_registry.register_lazy(
1401
b'Bazaar pack repository format 1 with subtree support (needs bzr 0.92)\n',
1402
'breezy.bzr.knitpack_repo',
1403
'RepositoryFormatKnitPack3',
1405
format_registry.register_lazy(
1406
b'Bazaar pack repository format 1 with rich root (needs bzr 1.0)\n',
1407
'breezy.bzr.knitpack_repo',
1408
'RepositoryFormatKnitPack4',
1410
format_registry.register_lazy(
1411
b'Bazaar RepositoryFormatKnitPack5 (bzr 1.6)\n',
1412
'breezy.bzr.knitpack_repo',
1413
'RepositoryFormatKnitPack5',
1415
format_registry.register_lazy(
1416
b'Bazaar RepositoryFormatKnitPack5RichRoot (bzr 1.6.1)\n',
1417
'breezy.bzr.knitpack_repo',
1418
'RepositoryFormatKnitPack5RichRoot',
1420
format_registry.register_lazy(
1421
b'Bazaar RepositoryFormatKnitPack5RichRoot (bzr 1.6)\n',
1422
'breezy.bzr.knitpack_repo',
1423
'RepositoryFormatKnitPack5RichRootBroken',
1425
format_registry.register_lazy(
1426
b'Bazaar RepositoryFormatKnitPack6 (bzr 1.9)\n',
1427
'breezy.bzr.knitpack_repo',
1428
'RepositoryFormatKnitPack6',
1430
format_registry.register_lazy(
1431
b'Bazaar RepositoryFormatKnitPack6RichRoot (bzr 1.9)\n',
1432
'breezy.bzr.knitpack_repo',
1433
'RepositoryFormatKnitPack6RichRoot',
1435
format_registry.register_lazy(
1436
b'Bazaar repository format 2a (needs bzr 1.16 or later)\n',
1437
'breezy.bzr.groupcompress_repo',
1438
'RepositoryFormat2a',
1441
# Development formats.
1442
# Check their docstrings to see if/when they are obsolete.
1443
format_registry.register_lazy(
1444
(b"Bazaar development format 2 with subtree support "
1445
b"(needs bzr.dev from before 1.8)\n"),
1446
'breezy.bzr.knitpack_repo',
1447
'RepositoryFormatPackDevelopment2Subtree',
1449
format_registry.register_lazy(
1450
b'Bazaar development format 8\n',
1451
'breezy.bzr.groupcompress_repo',
1452
'RepositoryFormat2aSubtree',
1456
class InterRepository(InterObject):
1457
"""This class represents operations taking place between two repositories.
1459
Its instances have methods like copy_content and fetch, and contain
1460
references to the source and target repositories these operations can be
1463
Often we will provide convenience methods on 'repository' which carry out
1464
operations with another repository - they will always forward to
1465
InterRepository.get(other).method_name(parameters).
1469
"""The available optimised InterRepository types."""
1471
def copy_content(self, revision_id=None):
1472
"""Make a complete copy of the content in self into destination.
1474
This is a destructive operation! Do not use it on existing
1477
:param revision_id: Only copy the content needed to construct
1478
revision_id and its parents.
1480
with self.lock_write():
1482
self.target.set_make_working_trees(
1483
self.source.make_working_trees())
1484
except NotImplementedError:
1486
self.target.fetch(self.source, revision_id=revision_id)
1488
def fetch(self, revision_id=None, find_ghosts=False):
1489
"""Fetch the content required to construct revision_id.
1491
The content is copied from self.source to self.target.
1493
:param revision_id: if None all content is copied, if NULL_REVISION no
1497
raise NotImplementedError(self.fetch)
1499
def search_missing_revision_ids(
1500
self, find_ghosts=True, revision_ids=None, if_present_ids=None,
1502
"""Return the revision ids that source has that target does not.
1504
:param revision_ids: return revision ids included by these
1505
revision_ids. NoSuchRevision will be raised if any of these
1506
revisions are not present.
1507
:param if_present_ids: like revision_ids, but will not cause
1508
NoSuchRevision if any of these are absent, instead they will simply
1509
not be in the result. This is useful for e.g. finding revisions
1510
to fetch for tags, which may reference absent revisions.
1511
:param find_ghosts: If True find missing revisions in deep history
1512
rather than just finding the surface difference.
1513
:param limit: Maximum number of revisions to return, topologically
1515
:return: A breezy.graph.SearchResult.
1517
raise NotImplementedError(self.search_missing_revision_ids)
1520
def _same_model(source, target):
1521
"""True if source and target have the same data representation.
1523
Note: this is always called on the base class; overriding it in a
1524
subclass will have no effect.
1527
InterRepository._assert_same_model(source, target)
1529
except errors.IncompatibleRepositories as e:
1533
def _assert_same_model(source, target):
1534
"""Raise an exception if two repositories do not use the same model.
1536
if source.supports_rich_root() != target.supports_rich_root():
1537
raise errors.IncompatibleRepositories(source, target,
1538
"different rich-root support")
1539
if source._serializer != target._serializer:
1540
raise errors.IncompatibleRepositories(source, target,
1541
"different serializers")
1544
class CopyConverter(object):
1545
"""A repository conversion tool which just performs a copy of the content.
1547
This is slow but quite reliable.
1550
def __init__(self, target_format):
1551
"""Create a CopyConverter.
1553
:param target_format: The format the resulting repository should be.
1555
self.target_format = target_format
1557
def convert(self, repo, pb):
1558
"""Perform the conversion of to_convert, giving feedback via pb.
1560
:param to_convert: The disk object to convert.
1561
:param pb: a progress bar to use for progress information.
1563
with ui.ui_factory.nested_progress_bar() as pb:
1566
# this is only useful with metadir layouts - separated repo content.
1567
# trigger an assertion if not such
1568
repo._format.get_format_string()
1569
self.repo_dir = repo.controldir
1570
pb.update(gettext('Moving repository to repository.backup'))
1571
self.repo_dir.transport.move('repository', 'repository.backup')
1572
backup_transport = self.repo_dir.transport.clone(
1573
'repository.backup')
1574
repo._format.check_conversion_target(self.target_format)
1575
self.source_repo = repo._format.open(self.repo_dir,
1577
_override_transport=backup_transport)
1578
pb.update(gettext('Creating new repository'))
1579
converted = self.target_format.initialize(self.repo_dir,
1580
self.source_repo.is_shared())
1581
converted.lock_write()
1583
pb.update(gettext('Copying content'))
1584
self.source_repo.copy_content_into(converted)
1587
pb.update(gettext('Deleting old repository content'))
1588
self.repo_dir.transport.delete_tree('repository.backup')
1589
ui.ui_factory.note(gettext('repository converted'))
1592
def _strip_NULL_ghosts(revision_graph):
1593
"""Also don't use this. more compatibility code for unmigrated clients."""
1594
# Filter ghosts, and null:
1595
if _mod_revision.NULL_REVISION in revision_graph:
1596
del revision_graph[_mod_revision.NULL_REVISION]
1597
for key, parents in viewitems(revision_graph):
1598
revision_graph[key] = tuple(parent for parent in parents if parent
1600
return revision_graph
1603
def _iter_for_revno(repo, partial_history_cache, stop_index=None,
1604
stop_revision=None):
1605
"""Extend the partial history to include a given index
1607
If a stop_index is supplied, stop when that index has been reached.
1608
If a stop_revision is supplied, stop when that revision is
1609
encountered. Otherwise, stop when the beginning of history is
1612
:param stop_index: The index which should be present. When it is
1613
present, history extension will stop.
1614
:param stop_revision: The revision id which should be present. When
1615
it is encountered, history extension will stop.
1617
start_revision = partial_history_cache[-1]
1618
graph = repo.get_graph()
1619
iterator = graph.iter_lefthand_ancestry(start_revision,
1620
(_mod_revision.NULL_REVISION,))
1622
# skip the last revision in the list
1625
if (stop_index is not None and
1626
len(partial_history_cache) > stop_index):
1628
if partial_history_cache[-1] == stop_revision:
1630
revision_id = next(iterator)
1631
partial_history_cache.append(revision_id)
1632
except StopIteration:
1637
class _LazyListJoin(object):
1638
"""An iterable yielding the contents of many lists as one list.
1640
Each iterator made from this will reflect the current contents of the lists
1641
at the time the iterator is made.
1643
This is used by Repository's _make_parents_provider implementation so that
1646
pp = repo._make_parents_provider() # uses a list of fallback repos
1647
pp.add_fallback_repository(other_repo) # appends to that list
1648
result = pp.get_parent_map(...)
1649
# The result will include revs from other_repo
1652
def __init__(self, *list_parts):
1653
self.list_parts = list_parts
1657
for list_part in self.list_parts:
1658
full_list.extend(list_part)
1659
return iter(full_list)
1662
return "%s.%s(%s)" % (self.__module__, self.__class__.__name__,
added
removed
breezy/repository.py
