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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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testament as _mod_testament,
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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 needs_read_lock, needs_write_lock, 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 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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self._committer = self._config_stack.get('email')
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elif not isinstance(committer, unicode):
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self._committer = committer.decode() # throw if non-ascii
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self._committer = committer
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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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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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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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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 _gen_revision_id(self):
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"""Return new revision-id."""
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return generate_ids.gen_revision_id(self._committer, self._timestamp)
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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 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 (file_id, 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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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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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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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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# 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
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between file ids and backend store to manage the insertion of data from
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both fetch and commit operations.
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A write lock is required around the start_write_group/commit_write_group
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for the support of lock-requiring repository formats.
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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)
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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._start_write_group()
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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 _start_write_group(self):
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"""Template method for per-repository write group startup.
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This is called before the write group is considered to be
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def sprout(self, to_bzrdir, revision_id=None):
773
"""Create a descendent repository for new development.
775
Unlike clone, this does not copy the settings of the repository.
777
dest_repo = self._create_sprouting_repo(to_bzrdir, shared=False)
778
dest_repo.fetch(self, revision_id=revision_id)
781
def _create_sprouting_repo(self, a_controldir, shared):
782
if not isinstance(a_controldir._format, self.controldir._format.__class__):
783
# use target default format.
784
dest_repo = a_controldir.create_repository()
786
# Most control formats need the repository to be specifically
787
# created, but on some old all-in-one formats it's not needed
789
dest_repo = self._format.initialize(a_controldir, shared=shared)
790
except errors.UninitializableFormat:
791
dest_repo = a_controldir.open_repository()
795
def has_revision(self, revision_id):
796
"""True if this repository has a copy of the revision."""
797
return revision_id in self.has_revisions((revision_id,))
800
def has_revisions(self, revision_ids):
801
"""Probe to find out the presence of multiple revisions.
803
:param revision_ids: An iterable of revision_ids.
804
:return: A set of the revision_ids that were present.
806
raise NotImplementedError(self.has_revisions)
809
def get_revision(self, revision_id):
810
"""Return the Revision object for a named revision."""
811
return self.get_revisions([revision_id])[0]
813
def get_revision_reconcile(self, revision_id):
814
"""'reconcile' helper routine that allows access to a revision always.
816
This variant of get_revision does not cross check the weave graph
817
against the revision one as get_revision does: but it should only
818
be used by reconcile, or reconcile-alike commands that are correcting
819
or testing the revision graph.
821
raise NotImplementedError(self.get_revision_reconcile)
823
def get_revisions(self, revision_ids):
824
"""Get many revisions at once.
826
Repositories that need to check data on every revision read should
827
subclass this method.
829
raise NotImplementedError(self.get_revisions)
831
def get_deltas_for_revisions(self, revisions, specific_fileids=None):
832
"""Produce a generator of revision deltas.
834
Note that the input is a sequence of REVISIONS, not revision_ids.
835
Trees will be held in memory until the generator exits.
836
Each delta is relative to the revision's lefthand predecessor.
838
:param specific_fileids: if not None, the result is filtered
839
so that only those file-ids, their parents and their
840
children are included.
842
# Get the revision-ids of interest
843
required_trees = set()
844
for revision in revisions:
845
required_trees.add(revision.revision_id)
846
required_trees.update(revision.parent_ids[:1])
848
# Get the matching filtered trees. Note that it's more
849
# efficient to pass filtered trees to changes_from() rather
850
# than doing the filtering afterwards. changes_from() could
851
# arguably do the filtering itself but it's path-based, not
852
# file-id based, so filtering before or afterwards is
854
if specific_fileids is None:
855
trees = dict((t.get_revision_id(), t) for
856
t in self.revision_trees(required_trees))
858
trees = dict((t.get_revision_id(), t) for
859
t in self._filtered_revision_trees(required_trees,
862
# Calculate the deltas
863
for revision in revisions:
864
if not revision.parent_ids:
865
old_tree = self.revision_tree(_mod_revision.NULL_REVISION)
867
old_tree = trees[revision.parent_ids[0]]
868
yield trees[revision.revision_id].changes_from(old_tree)
871
def get_revision_delta(self, revision_id, specific_fileids=None):
872
"""Return the delta for one revision.
874
The delta is relative to the left-hand predecessor of the
877
:param specific_fileids: if not None, the result is filtered
878
so that only those file-ids, their parents and their
879
children are included.
881
r = self.get_revision(revision_id)
882
return list(self.get_deltas_for_revisions([r],
883
specific_fileids=specific_fileids))[0]
886
def store_revision_signature(self, gpg_strategy, plaintext, revision_id):
887
signature = gpg_strategy.sign(plaintext)
888
self.add_signature_text(revision_id, 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:
927
'requested revno (%d) is later than given known revno (%d)'
928
% (revno, known_revno))
931
self, partial_history, stop_index=distance_from_known)
932
except errors.RevisionNotPresent as err:
933
if err.revision_id == known_revid:
934
# The start revision (known_revid) wasn't found.
936
# This is a stacked repository with no fallbacks, or a there's a
937
# left-hand ghost. Either way, even though the revision named in
938
# the error isn't in this repo, we know it's the next step in this
940
partial_history.append(err.revision_id)
941
if len(partial_history) <= distance_from_known:
942
# Didn't find enough history to get a revid for the revno.
943
earliest_revno = known_revno - len(partial_history) + 1
944
return (False, (earliest_revno, partial_history[-1]))
945
if len(partial_history) - 1 > distance_from_known:
946
raise AssertionError('_iter_for_revno returned too much history')
947
return (True, partial_history[-1])
950
"""Return True if this repository is flagged as a shared repository."""
951
raise NotImplementedError(self.is_shared)
954
def reconcile(self, other=None, thorough=False):
955
"""Reconcile this repository."""
956
from .reconcile import RepoReconciler
957
reconciler = RepoReconciler(self, thorough=thorough)
958
reconciler.reconcile()
961
def _refresh_data(self):
962
"""Helper called from lock_* to ensure coherency with disk.
964
The default implementation does nothing; it is however possible
965
for repositories to maintain loaded indices across multiple locks
966
by checking inside their implementation of this method to see
967
whether their indices are still valid. This depends of course on
968
the disk format being validatable in this manner. This method is
969
also called by the refresh_data() public interface to cause a refresh
970
to occur while in a write lock so that data inserted by a smart server
971
push operation is visible on the client's instance of the physical
976
def revision_tree(self, revision_id):
977
"""Return Tree for a revision on this branch.
979
`revision_id` may be NULL_REVISION for the empty tree revision.
981
raise NotImplementedError(self.revision_tree)
983
def revision_trees(self, revision_ids):
984
"""Return Trees for revisions in this repository.
986
:param revision_ids: a sequence of revision-ids;
987
a revision-id may not be None or 'null:'
989
raise NotImplementedError(self.revision_trees)
991
def pack(self, hint=None, clean_obsolete_packs=False):
992
"""Compress the data within the repository.
994
This operation only makes sense for some repository types. For other
995
types it should be a no-op that just returns.
997
This stub method does not require a lock, but subclasses should use
998
@needs_write_lock as this is a long running call it's reasonable to
999
implicitly lock for the user.
1001
:param hint: If not supplied, the whole repository is packed.
1002
If supplied, the repository may use the hint parameter as a
1003
hint for the parts of the repository to pack. A hint can be
1004
obtained from the result of commit_write_group(). Out of
1005
date hints are simply ignored, because concurrent operations
1006
can obsolete them rapidly.
1008
:param clean_obsolete_packs: Clean obsolete packs immediately after
1012
def get_transaction(self):
1013
return self.control_files.get_transaction()
1015
def get_parent_map(self, revision_ids):
1016
"""See graph.StackedParentsProvider.get_parent_map"""
1017
raise NotImplementedError(self.get_parent_map)
1019
def _get_parent_map_no_fallbacks(self, revision_ids):
1020
"""Same as Repository.get_parent_map except doesn't query fallbacks."""
1021
# revisions index works in keys; this just works in revisions
1022
# therefore wrap and unwrap
1025
for revision_id in revision_ids:
1026
if revision_id == _mod_revision.NULL_REVISION:
1027
result[revision_id] = ()
1028
elif revision_id is None:
1029
raise ValueError('get_parent_map(None) is not valid')
1031
query_keys.append((revision_id ,))
1032
vf = self.revisions.without_fallbacks()
1033
for (revision_id,), parent_keys in viewitems(
1034
vf.get_parent_map(query_keys)):
1036
result[revision_id] = tuple([parent_revid
1037
for (parent_revid,) in parent_keys])
1039
result[revision_id] = (_mod_revision.NULL_REVISION,)
1042
def _make_parents_provider(self):
1043
if not self._format.supports_external_lookups:
1045
return graph.StackedParentsProvider(_LazyListJoin(
1046
[self._make_parents_provider_unstacked()],
1047
self._fallback_repositories))
1049
def _make_parents_provider_unstacked(self):
1050
return graph.CallableToParentsProviderAdapter(
1051
self._get_parent_map_no_fallbacks)
1054
def get_known_graph_ancestry(self, revision_ids):
1055
"""Return the known graph for a set of revision ids and their ancestors.
1057
raise NotImplementedError(self.get_known_graph_ancestry)
1059
def get_file_graph(self):
1060
"""Return the graph walker for files."""
1061
raise NotImplementedError(self.get_file_graph)
1063
def get_graph(self, other_repository=None):
1064
"""Return the graph walker for this repository format"""
1065
parents_provider = self._make_parents_provider()
1066
if (other_repository is not None and
1067
not self.has_same_location(other_repository)):
1068
parents_provider = graph.StackedParentsProvider(
1069
[parents_provider, other_repository._make_parents_provider()])
1070
return graph.Graph(parents_provider)
1073
def set_make_working_trees(self, new_value):
1074
"""Set the policy flag for making working trees when creating branches.
1076
This only applies to branches that use this repository.
1078
The default is 'True'.
1079
:param new_value: True to restore the default, False to disable making
1082
raise NotImplementedError(self.set_make_working_trees)
1084
def make_working_trees(self):
1085
"""Returns the policy for making working trees on new branches."""
1086
raise NotImplementedError(self.make_working_trees)
1089
def sign_revision(self, revision_id, gpg_strategy):
1090
testament = _mod_testament.Testament.from_revision(self, revision_id)
1091
plaintext = testament.as_short_text()
1092
self.store_revision_signature(gpg_strategy, plaintext, revision_id)
1095
def verify_revision_signature(self, revision_id, gpg_strategy):
1096
"""Verify the signature on a revision.
1098
:param revision_id: the revision to verify
1099
:gpg_strategy: the GPGStrategy object to used
1101
:return: gpg.SIGNATURE_VALID or a failed SIGNATURE_ value
1103
if not self.has_signature_for_revision_id(revision_id):
1104
return gpg.SIGNATURE_NOT_SIGNED, None
1105
signature = self.get_signature_text(revision_id)
1107
testament = _mod_testament.Testament.from_revision(self, revision_id)
1108
plaintext = testament.as_short_text()
1110
return gpg_strategy.verify(signature, plaintext)
1113
def verify_revision_signatures(self, revision_ids, gpg_strategy):
1114
"""Verify revision signatures for a number of revisions.
1116
:param revision_id: the revision to verify
1117
:gpg_strategy: the GPGStrategy object to used
1118
:return: Iterator over tuples with revision id, result and keys
1120
for revid in revision_ids:
1121
(result, key) = self.verify_revision_signature(revid, gpg_strategy)
1122
yield revid, result, key
1124
def has_signature_for_revision_id(self, revision_id):
1125
"""Query for a revision signature for revision_id in the repository."""
1126
raise NotImplementedError(self.has_signature_for_revision_id)
1128
def get_signature_text(self, revision_id):
1129
"""Return the text for a signature."""
1130
raise NotImplementedError(self.get_signature_text)
1132
def check(self, revision_ids=None, callback_refs=None, check_repo=True):
1133
"""Check consistency of all history of given revision_ids.
1135
Different repository implementations should override _check().
1137
:param revision_ids: A non-empty list of revision_ids whose ancestry
1138
will be checked. Typically the last revision_id of a branch.
1139
:param callback_refs: A dict of check-refs to resolve and callback
1140
the check/_check method on the items listed as wanting the ref.
1142
:param check_repo: If False do not check the repository contents, just
1143
calculate the data callback_refs requires and call them back.
1145
return self._check(revision_ids=revision_ids, callback_refs=callback_refs,
1146
check_repo=check_repo)
1148
def _check(self, revision_ids=None, callback_refs=None, check_repo=True):
1149
raise NotImplementedError(self.check)
1151
def _warn_if_deprecated(self, branch=None):
1152
if not self._format.is_deprecated():
1154
global _deprecation_warning_done
1155
if _deprecation_warning_done:
1159
conf = config.GlobalStack()
1161
conf = branch.get_config_stack()
1162
if 'format_deprecation' in conf.get('suppress_warnings'):
1164
warning("Format %s for %s is deprecated -"
1165
" please use 'brz upgrade' to get better performance"
1166
% (self._format, self.controldir.transport.base))
1168
_deprecation_warning_done = True
1170
def supports_rich_root(self):
1171
return self._format.rich_root_data
1173
def _check_ascii_revisionid(self, revision_id, method):
1174
"""Private helper for ascii-only repositories."""
1175
# weave repositories refuse to store revisionids that are non-ascii.
1176
if revision_id is not None:
1177
# weaves require ascii revision ids.
1178
if isinstance(revision_id, unicode):
1180
revision_id.encode('ascii')
1181
except UnicodeEncodeError:
1182
raise errors.NonAsciiRevisionId(method, self)
1185
revision_id.decode('ascii')
1186
except UnicodeDecodeError:
1187
raise errors.NonAsciiRevisionId(method, self)
1190
class RepositoryFormatRegistry(controldir.ControlComponentFormatRegistry):
1191
"""Repository format registry."""
1193
def get_default(self):
1194
"""Return the current default format."""
1195
return controldir.format_registry.make_controldir('default').repository_format
1198
network_format_registry = registry.FormatRegistry()
1199
"""Registry of formats indexed by their network name.
1201
The network name for a repository format is an identifier that can be used when
1202
referring to formats with smart server operations. See
1203
RepositoryFormat.network_name() for more detail.
1207
format_registry = RepositoryFormatRegistry(network_format_registry)
1208
"""Registry of formats, indexed by their BzrDirMetaFormat format string.
1210
This can contain either format instances themselves, or classes/factories that
1211
can be called to obtain one.
1215
#####################################################################
1216
# Repository Formats
1218
class RepositoryFormat(controldir.ControlComponentFormat):
1219
"""A repository format.
1221
Formats provide four things:
1222
* An initialization routine to construct repository data on disk.
1223
* a optional format string which is used when the BzrDir supports
1225
* an open routine which returns a Repository instance.
1226
* A network name for referring to the format in smart server RPC
1229
There is one and only one Format subclass for each on-disk format. But
1230
there can be one Repository subclass that is used for several different
1231
formats. The _format attribute on a Repository instance can be used to
1232
determine the disk format.
1234
Formats are placed in a registry by their format string for reference
1235
during opening. These should be subclasses of RepositoryFormat for
1238
Once a format is deprecated, just deprecate the initialize and open
1239
methods on the format class. Do not deprecate the object, as the
1240
object may be created even when a repository instance hasn't been
1243
Common instance attributes:
1244
_matchingbzrdir - the controldir format that the repository format was
1245
originally written to work with. This can be used if manually
1246
constructing a bzrdir and repository, or more commonly for test suite
1250
# Set to True or False in derived classes. True indicates that the format
1251
# supports ghosts gracefully.
1252
supports_ghosts = None
1253
# Can this repository be given external locations to lookup additional
1254
# data. Set to True or False in derived classes.
1255
supports_external_lookups = None
1256
# Does this format support CHK bytestring lookups. Set to True or False in
1258
supports_chks = None
1259
# Should fetch trigger a reconcile after the fetch? Only needed for
1260
# some repository formats that can suffer internal inconsistencies.
1261
_fetch_reconcile = False
1262
# Does this format have < O(tree_size) delta generation. Used to hint what
1263
# code path for commit, amongst other things.
1265
# Does doing a pack operation compress data? Useful for the pack UI command
1266
# (so if there is one pack, the operation can still proceed because it may
1267
# help), and for fetching when data won't have come from the same
1269
pack_compresses = False
1270
# Does the repository storage understand references to trees?
1271
supports_tree_reference = None
1272
# Is the format experimental ?
1273
experimental = False
1274
# Does this repository format escape funky characters, or does it create
1275
# files with similar names as the versioned files in its contents on disk
1277
supports_funky_characters = None
1278
# Does this repository format support leaving locks?
1279
supports_leaving_lock = None
1280
# Does this format support the full VersionedFiles interface?
1281
supports_full_versioned_files = None
1282
# Does this format support signing revision signatures?
1283
supports_revision_signatures = True
1284
# Can the revision graph have incorrect parents?
1285
revision_graph_can_have_wrong_parents = None
1286
# Does this format support rich root data?
1287
rich_root_data = None
1288
# Does this format support explicitly versioned directories?
1289
supports_versioned_directories = None
1290
# Can other repositories be nested into one of this format?
1291
supports_nesting_repositories = None
1292
# Is it possible for revisions to be present without being referenced
1294
supports_unreferenced_revisions = None
1297
return "%s()" % self.__class__.__name__
1299
def __eq__(self, other):
1300
# format objects are generally stateless
1301
return isinstance(other, self.__class__)
1303
def __ne__(self, other):
1304
return not self == other
1306
def get_format_description(self):
1307
"""Return the short description for this format."""
1308
raise NotImplementedError(self.get_format_description)
1310
def initialize(self, controldir, shared=False):
1311
"""Initialize a repository of this format in controldir.
1313
:param controldir: The controldir to put the new repository in it.
1314
:param shared: The repository should be initialized as a sharable one.
1315
:returns: The new repository object.
1317
This may raise UninitializableFormat if shared repository are not
1318
compatible the controldir.
1320
raise NotImplementedError(self.initialize)
1322
def is_supported(self):
1323
"""Is this format supported?
1325
Supported formats must be initializable and openable.
1326
Unsupported formats may not support initialization or committing or
1327
some other features depending on the reason for not being supported.
1331
def is_deprecated(self):
1332
"""Is this format deprecated?
1334
Deprecated formats may trigger a user-visible warning recommending
1335
the user to upgrade. They are still fully supported.
1339
def network_name(self):
1340
"""A simple byte string uniquely identifying this format for RPC calls.
1342
MetaDir repository formats use their disk format string to identify the
1343
repository over the wire. All in one formats such as bzr < 0.8, and
1344
foreign formats like svn/git and hg should use some marker which is
1345
unique and immutable.
1347
raise NotImplementedError(self.network_name)
1349
def check_conversion_target(self, target_format):
1350
if self.rich_root_data and not target_format.rich_root_data:
1351
raise errors.BadConversionTarget(
1352
'Does not support rich root data.', target_format,
1354
if (self.supports_tree_reference and
1355
not getattr(target_format, 'supports_tree_reference', False)):
1356
raise errors.BadConversionTarget(
1357
'Does not support nested trees', target_format,
1360
def open(self, controldir, _found=False):
1361
"""Return an instance of this format for a controldir.
1363
_found is a private parameter, do not use it.
1365
raise NotImplementedError(self.open)
1367
def _run_post_repo_init_hooks(self, repository, controldir, shared):
1368
from .controldir import ControlDir, RepoInitHookParams
1369
hooks = ControlDir.hooks['post_repo_init']
1372
params = RepoInitHookParams(repository, self, controldir, shared)
1377
# formats which have no format string are not discoverable or independently
1378
# creatable on disk, so are not registered in format_registry. They're
1379
# all in breezy.bzr.knitreponow. When an instance of one of these is
1380
# needed, it's constructed directly by the ControlDir. Non-native formats where
1381
# the repository is not separately opened are similar.
1383
format_registry.register_lazy(
1384
'Bazaar-NG Knit Repository Format 1',
1385
'breezy.bzr.knitrepo',
1386
'RepositoryFormatKnit1',
1389
format_registry.register_lazy(
1390
'Bazaar Knit Repository Format 3 (bzr 0.15)\n',
1391
'breezy.bzr.knitrepo',
1392
'RepositoryFormatKnit3',
1395
format_registry.register_lazy(
1396
'Bazaar Knit Repository Format 4 (bzr 1.0)\n',
1397
'breezy.bzr.knitrepo',
1398
'RepositoryFormatKnit4',
1401
# Pack-based formats. There is one format for pre-subtrees, and one for
1402
# post-subtrees to allow ease of testing.
1403
# NOTE: These are experimental in 0.92. Stable in 1.0 and above
1404
format_registry.register_lazy(
1405
'Bazaar pack repository format 1 (needs bzr 0.92)\n',
1406
'breezy.bzr.knitpack_repo',
1407
'RepositoryFormatKnitPack1',
1409
format_registry.register_lazy(
1410
'Bazaar pack repository format 1 with subtree support (needs bzr 0.92)\n',
1411
'breezy.bzr.knitpack_repo',
1412
'RepositoryFormatKnitPack3',
1414
format_registry.register_lazy(
1415
'Bazaar pack repository format 1 with rich root (needs bzr 1.0)\n',
1416
'breezy.bzr.knitpack_repo',
1417
'RepositoryFormatKnitPack4',
1419
format_registry.register_lazy(
1420
'Bazaar RepositoryFormatKnitPack5 (bzr 1.6)\n',
1421
'breezy.bzr.knitpack_repo',
1422
'RepositoryFormatKnitPack5',
1424
format_registry.register_lazy(
1425
'Bazaar RepositoryFormatKnitPack5RichRoot (bzr 1.6.1)\n',
1426
'breezy.bzr.knitpack_repo',
1427
'RepositoryFormatKnitPack5RichRoot',
1429
format_registry.register_lazy(
1430
'Bazaar RepositoryFormatKnitPack5RichRoot (bzr 1.6)\n',
1431
'breezy.bzr.knitpack_repo',
1432
'RepositoryFormatKnitPack5RichRootBroken',
1434
format_registry.register_lazy(
1435
'Bazaar RepositoryFormatKnitPack6 (bzr 1.9)\n',
1436
'breezy.bzr.knitpack_repo',
1437
'RepositoryFormatKnitPack6',
1439
format_registry.register_lazy(
1440
'Bazaar RepositoryFormatKnitPack6RichRoot (bzr 1.9)\n',
1441
'breezy.bzr.knitpack_repo',
1442
'RepositoryFormatKnitPack6RichRoot',
1444
format_registry.register_lazy(
1445
'Bazaar repository format 2a (needs bzr 1.16 or later)\n',
1446
'breezy.bzr.groupcompress_repo',
1447
'RepositoryFormat2a',
1450
# Development formats.
1451
# Check their docstrings to see if/when they are obsolete.
1452
format_registry.register_lazy(
1453
("Bazaar development format 2 with subtree support "
1454
"(needs bzr.dev from before 1.8)\n"),
1455
'breezy.bzr.knitpack_repo',
1456
'RepositoryFormatPackDevelopment2Subtree',
1458
format_registry.register_lazy(
1459
'Bazaar development format 8\n',
1460
'breezy.bzr.groupcompress_repo',
1461
'RepositoryFormat2aSubtree',
1465
class InterRepository(InterObject):
1466
"""This class represents operations taking place between two repositories.
1468
Its instances have methods like copy_content and fetch, and contain
1469
references to the source and target repositories these operations can be
1472
Often we will provide convenience methods on 'repository' which carry out
1473
operations with another repository - they will always forward to
1474
InterRepository.get(other).method_name(parameters).
1478
"""The available optimised InterRepository types."""
1481
def copy_content(self, revision_id=None):
1482
"""Make a complete copy of the content in self into destination.
1484
This is a destructive operation! Do not use it on existing
1487
:param revision_id: Only copy the content needed to construct
1488
revision_id and its parents.
1491
self.target.set_make_working_trees(
1492
self.source.make_working_trees())
1493
except NotImplementedError:
1495
self.target.fetch(self.source, revision_id=revision_id)
1498
def fetch(self, revision_id=None, find_ghosts=False):
1499
"""Fetch the content required to construct revision_id.
1501
The content is copied from self.source to self.target.
1503
:param revision_id: if None all content is copied, if NULL_REVISION no
1507
raise NotImplementedError(self.fetch)
1510
def search_missing_revision_ids(
1511
self, find_ghosts=True, revision_ids=None, if_present_ids=None,
1513
"""Return the revision ids that source has that target does not.
1515
:param revision_ids: return revision ids included by these
1516
revision_ids. NoSuchRevision will be raised if any of these
1517
revisions are not present.
1518
:param if_present_ids: like revision_ids, but will not cause
1519
NoSuchRevision if any of these are absent, instead they will simply
1520
not be in the result. This is useful for e.g. finding revisions
1521
to fetch for tags, which may reference absent revisions.
1522
:param find_ghosts: If True find missing revisions in deep history
1523
rather than just finding the surface difference.
1524
:param limit: Maximum number of revisions to return, topologically
1526
:return: A breezy.graph.SearchResult.
1528
raise NotImplementedError(self.search_missing_revision_ids)
1531
def _same_model(source, target):
1532
"""True if source and target have the same data representation.
1534
Note: this is always called on the base class; overriding it in a
1535
subclass will have no effect.
1538
InterRepository._assert_same_model(source, target)
1540
except errors.IncompatibleRepositories as e:
1544
def _assert_same_model(source, target):
1545
"""Raise an exception if two repositories do not use the same model.
1547
if source.supports_rich_root() != target.supports_rich_root():
1548
raise errors.IncompatibleRepositories(source, target,
1549
"different rich-root support")
1550
if source._serializer != target._serializer:
1551
raise errors.IncompatibleRepositories(source, target,
1552
"different serializers")
1555
class CopyConverter(object):
1556
"""A repository conversion tool which just performs a copy of the content.
1558
This is slow but quite reliable.
1561
def __init__(self, target_format):
1562
"""Create a CopyConverter.
1564
:param target_format: The format the resulting repository should be.
1566
self.target_format = target_format
1568
def convert(self, repo, pb):
1569
"""Perform the conversion of to_convert, giving feedback via pb.
1571
:param to_convert: The disk object to convert.
1572
:param pb: a progress bar to use for progress information.
1574
pb = ui.ui_factory.nested_progress_bar()
1577
# this is only useful with metadir layouts - separated repo content.
1578
# trigger an assertion if not such
1579
repo._format.get_format_string()
1580
self.repo_dir = repo.controldir
1581
pb.update(gettext('Moving repository to repository.backup'))
1582
self.repo_dir.transport.move('repository', 'repository.backup')
1583
backup_transport = self.repo_dir.transport.clone('repository.backup')
1584
repo._format.check_conversion_target(self.target_format)
1585
self.source_repo = repo._format.open(self.repo_dir,
1587
_override_transport=backup_transport)
1588
pb.update(gettext('Creating new repository'))
1589
converted = self.target_format.initialize(self.repo_dir,
1590
self.source_repo.is_shared())
1591
converted.lock_write()
1593
pb.update(gettext('Copying content'))
1594
self.source_repo.copy_content_into(converted)
1597
pb.update(gettext('Deleting old repository content'))
1598
self.repo_dir.transport.delete_tree('repository.backup')
1599
ui.ui_factory.note(gettext('repository converted'))
1603
def _strip_NULL_ghosts(revision_graph):
1604
"""Also don't use this. more compatibility code for unmigrated clients."""
1605
# Filter ghosts, and null:
1606
if _mod_revision.NULL_REVISION in revision_graph:
1607
del revision_graph[_mod_revision.NULL_REVISION]
1608
for key, parents in viewitems(revision_graph):
1609
revision_graph[key] = tuple(parent for parent in parents if parent
1611
return revision_graph
1614
def _iter_for_revno(repo, partial_history_cache, stop_index=None,
1615
stop_revision=None):
1616
"""Extend the partial history to include a given index
1618
If a stop_index is supplied, stop when that index has been reached.
1619
If a stop_revision is supplied, stop when that revision is
1620
encountered. Otherwise, stop when the beginning of history is
1623
:param stop_index: The index which should be present. When it is
1624
present, history extension will stop.
1625
:param stop_revision: The revision id which should be present. When
1626
it is encountered, history extension will stop.
1628
start_revision = partial_history_cache[-1]
1629
graph = repo.get_graph()
1630
iterator = graph.iter_lefthand_ancestry(start_revision,
1631
(_mod_revision.NULL_REVISION,))
1633
# skip the last revision in the list
1636
if (stop_index is not None and
1637
len(partial_history_cache) > stop_index):
1639
if partial_history_cache[-1] == stop_revision:
1641
revision_id = next(iterator)
1642
partial_history_cache.append(revision_id)
1643
except StopIteration:
1648
class _LazyListJoin(object):
1649
"""An iterable yielding the contents of many lists as one list.
1651
Each iterator made from this will reflect the current contents of the lists
1652
at the time the iterator is made.
1654
This is used by Repository's _make_parents_provider implementation so that
1657
pp = repo._make_parents_provider() # uses a list of fallback repos
1658
pp.add_fallback_repository(other_repo) # appends to that list
1659
result = pp.get_parent_map(...)
1660
# The result will include revs from other_repo
1663
def __init__(self, *list_parts):
1664
self.list_parts = list_parts
1668
for list_part in self.list_parts:
1669
full_list.extend(list_part)
1670
return iter(full_list)
1673
return "%s.%s(%s)" % (self.__module__, self.__class__.__name__,
added
removed
breezy/repository.py
