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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.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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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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class WriteGroup(object):
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"""Context manager that manages a write group.
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Raising an exception will result in the write group being aborted.
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def __init__(self, repository, suppress_errors=False):
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self.repository = repository
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self._suppress_errors = suppress_errors
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self.repository.start_write_group()
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def __exit__(self, exc_type, exc_val, exc_tb):
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self.repository.abort_write_group(self._suppress_errors)
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self.repository.commit_write_group()
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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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for branch in 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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for branch in branches:
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if not using and repository is not None:
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for branch in 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 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
765
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):
771
"""Start a write group in the repository.
773
Write groups are used by repositories which do not have a 1:1 mapping
774
between file ids and backend store to manage the insertion of data from
775
both fetch and commit operations.
777
A write lock is required around the
778
start_write_group/commit_write_group for the support of lock-requiring
781
One can only insert data into a repository inside a write group.
785
if not self.is_write_locked():
786
raise errors.NotWriteLocked(self)
787
if self._write_group:
788
raise errors.BzrError('already in a write group')
789
self._start_write_group()
790
# so we can detect unlock/relock - the write group is now entered.
791
self._write_group = self.get_transaction()
793
def _start_write_group(self):
794
"""Template method for per-repository write group startup.
796
This is called before the write group is considered to be
800
def sprout(self, to_bzrdir, revision_id=None):
801
"""Create a descendent repository for new development.
803
Unlike clone, this does not copy the settings of the repository.
805
with self.lock_read():
806
dest_repo = self._create_sprouting_repo(to_bzrdir, shared=False)
807
dest_repo.fetch(self, revision_id=revision_id)
810
def _create_sprouting_repo(self, a_controldir, shared):
812
a_controldir._format, self.controldir._format.__class__):
813
# use target default format.
814
dest_repo = a_controldir.create_repository()
816
# Most control formats need the repository to be specifically
817
# created, but on some old all-in-one formats it's not needed
819
dest_repo = self._format.initialize(
820
a_controldir, shared=shared)
821
except errors.UninitializableFormat:
822
dest_repo = a_controldir.open_repository()
825
def has_revision(self, revision_id):
826
"""True if this repository has a copy of the revision."""
827
with self.lock_read():
828
return revision_id in self.has_revisions((revision_id,))
830
def has_revisions(self, revision_ids):
831
"""Probe to find out the presence of multiple revisions.
833
:param revision_ids: An iterable of revision_ids.
834
:return: A set of the revision_ids that were present.
836
raise NotImplementedError(self.has_revisions)
838
def get_revision(self, revision_id):
839
"""Return the Revision object for a named revision."""
840
with self.lock_read():
841
return self.get_revisions([revision_id])[0]
843
def get_revision_reconcile(self, revision_id):
844
"""'reconcile' helper routine that allows access to a revision always.
846
This variant of get_revision does not cross check the weave graph
847
against the revision one as get_revision does: but it should only
848
be used by reconcile, or reconcile-alike commands that are correcting
849
or testing the revision graph.
851
raise NotImplementedError(self.get_revision_reconcile)
853
def get_revisions(self, revision_ids):
854
"""Get many revisions at once.
856
Repositories that need to check data on every revision read should
857
subclass this method.
860
for revid, rev in self.iter_revisions(revision_ids):
862
raise errors.NoSuchRevision(self, revid)
864
return [revs[revid] for revid in revision_ids]
866
def iter_revisions(self, revision_ids):
867
"""Iterate over revision objects.
869
:param revision_ids: An iterable of revisions to examine. None may be
870
passed to request all revisions known to the repository. Note that
871
not all repositories can find unreferenced revisions; for those
872
repositories only referenced ones will be returned.
873
:return: An iterator of (revid, revision) tuples. Absent revisions (
874
those asked for but not available) are returned as (revid, None).
875
N.B.: Revisions are not necessarily yielded in order.
877
raise NotImplementedError(self.iter_revisions)
879
def get_deltas_for_revisions(self, revisions, specific_fileids=None):
880
"""Produce a generator of revision deltas.
882
Note that the input is a sequence of REVISIONS, not revision_ids.
883
Trees will be held in memory until the generator exits.
884
Each delta is relative to the revision's lefthand predecessor.
886
:param specific_fileids: if not None, the result is filtered
887
so that only those file-ids, their parents and their
888
children are included.
890
raise NotImplementedError(self.get_deltas_for_revisions)
892
def get_revision_delta(self, revision_id):
893
"""Return the delta for one revision.
895
The delta is relative to the left-hand predecessor of the
898
with self.lock_read():
899
r = self.get_revision(revision_id)
900
return list(self.get_deltas_for_revisions([r]))[0]
902
def store_revision_signature(self, gpg_strategy, plaintext, revision_id):
903
raise NotImplementedError(self.store_revision_signature)
905
def add_signature_text(self, revision_id, signature):
906
"""Store a signature text for a revision.
908
:param revision_id: Revision id of the revision
909
:param signature: Signature text.
911
raise NotImplementedError(self.add_signature_text)
913
def iter_files_bytes(self, desired_files):
914
"""Iterate through file versions.
916
Files will not necessarily be returned in the order they occur in
917
desired_files. No specific order is guaranteed.
919
Yields pairs of identifier, bytes_iterator. identifier is an opaque
920
value supplied by the caller as part of desired_files. It should
921
uniquely identify the file version in the caller's context. (Examples:
922
an index number or a TreeTransform trans_id.)
924
:param desired_files: a list of (file_id, revision_id, identifier)
927
raise NotImplementedError(self.iter_files_bytes)
929
def get_rev_id_for_revno(self, revno, known_pair):
930
"""Return the revision id of a revno, given a later (revno, revid)
931
pair in the same history.
933
:return: if found (True, revid). If the available history ran out
934
before reaching the revno, then this returns
935
(False, (closest_revno, closest_revid)).
937
known_revno, known_revid = known_pair
938
partial_history = [known_revid]
939
distance_from_known = known_revno - revno
940
if distance_from_known < 0:
941
raise errors.RevnoOutOfBounds(revno, (0, known_revno))
944
self, partial_history, stop_index=distance_from_known)
945
except errors.RevisionNotPresent as err:
946
if err.revision_id == known_revid:
947
# The start revision (known_revid) wasn't found.
948
raise errors.NoSuchRevision(self, known_revid)
949
# This is a stacked repository with no fallbacks, or a there's a
950
# left-hand ghost. Either way, even though the revision named in
951
# the error isn't in this repo, we know it's the next step in this
953
partial_history.append(err.revision_id)
954
if len(partial_history) <= distance_from_known:
955
# Didn't find enough history to get a revid for the revno.
956
earliest_revno = known_revno - len(partial_history) + 1
957
return (False, (earliest_revno, partial_history[-1]))
958
if len(partial_history) - 1 > distance_from_known:
959
raise AssertionError('_iter_for_revno returned too much history')
960
return (True, partial_history[-1])
963
"""Return True if this repository is flagged as a shared repository."""
964
raise NotImplementedError(self.is_shared)
966
def reconcile(self, other=None, thorough=False):
967
"""Reconcile this repository."""
968
raise NotImplementedError(self.reconcile)
970
def _refresh_data(self):
971
"""Helper called from lock_* to ensure coherency with disk.
973
The default implementation does nothing; it is however possible
974
for repositories to maintain loaded indices across multiple locks
975
by checking inside their implementation of this method to see
976
whether their indices are still valid. This depends of course on
977
the disk format being validatable in this manner. This method is
978
also called by the refresh_data() public interface to cause a refresh
979
to occur while in a write lock so that data inserted by a smart server
980
push operation is visible on the client's instance of the physical
984
def revision_tree(self, revision_id):
985
"""Return Tree for a revision on this branch.
987
`revision_id` may be NULL_REVISION for the empty tree revision.
989
raise NotImplementedError(self.revision_tree)
991
def revision_trees(self, revision_ids):
992
"""Return Trees for revisions in this repository.
994
:param revision_ids: a sequence of revision-ids;
995
a revision-id may not be None or b'null:'
997
raise NotImplementedError(self.revision_trees)
999
def pack(self, hint=None, clean_obsolete_packs=False):
1000
"""Compress the data within the repository.
1002
This operation only makes sense for some repository types. For other
1003
types it should be a no-op that just returns.
1005
This stub method does not require a lock, but subclasses should use
1006
self.write_lock as this is a long running call it's reasonable to
1007
implicitly lock for the user.
1009
:param hint: If not supplied, the whole repository is packed.
1010
If supplied, the repository may use the hint parameter as a
1011
hint for the parts of the repository to pack. A hint can be
1012
obtained from the result of commit_write_group(). Out of
1013
date hints are simply ignored, because concurrent operations
1014
can obsolete them rapidly.
1016
:param clean_obsolete_packs: Clean obsolete packs immediately after
1020
def get_transaction(self):
1021
return self.control_files.get_transaction()
1023
def get_parent_map(self, revision_ids):
1024
"""See graph.StackedParentsProvider.get_parent_map"""
1025
raise NotImplementedError(self.get_parent_map)
1027
def _get_parent_map_no_fallbacks(self, revision_ids):
1028
"""Same as Repository.get_parent_map except doesn't query fallbacks."""
1029
# revisions index works in keys; this just works in revisions
1030
# therefore wrap and unwrap
1033
for revision_id in revision_ids:
1034
if revision_id == _mod_revision.NULL_REVISION:
1035
result[revision_id] = ()
1036
elif revision_id is None:
1037
raise ValueError('get_parent_map(None) is not valid')
1039
query_keys.append((revision_id,))
1040
vf = self.revisions.without_fallbacks()
1041
for (revision_id,), parent_keys in viewitems(
1042
vf.get_parent_map(query_keys)):
1044
result[revision_id] = tuple([parent_revid
1045
for (parent_revid,) in parent_keys])
1047
result[revision_id] = (_mod_revision.NULL_REVISION,)
1050
def _make_parents_provider(self):
1051
if not self._format.supports_external_lookups:
1053
return graph.StackedParentsProvider(_LazyListJoin(
1054
[self._make_parents_provider_unstacked()],
1055
self._fallback_repositories))
1057
def _make_parents_provider_unstacked(self):
1058
return graph.CallableToParentsProviderAdapter(
1059
self._get_parent_map_no_fallbacks)
1061
def get_known_graph_ancestry(self, revision_ids):
1062
"""Return the known graph for a set of revision ids and their ancestors.
1064
raise NotImplementedError(self.get_known_graph_ancestry)
1066
def get_file_graph(self):
1067
"""Return the graph walker for files."""
1068
raise NotImplementedError(self.get_file_graph)
1070
def get_graph(self, other_repository=None):
1071
"""Return the graph walker for this repository format"""
1072
parents_provider = self._make_parents_provider()
1073
if (other_repository is not None and
1074
not self.has_same_location(other_repository)):
1075
parents_provider = graph.StackedParentsProvider(
1076
[parents_provider, other_repository._make_parents_provider()])
1077
return graph.Graph(parents_provider)
1079
def set_make_working_trees(self, new_value):
1080
"""Set the policy flag for making working trees when creating branches.
1082
This only applies to branches that use this repository.
1084
The default is 'True'.
1085
:param new_value: True to restore the default, False to disable making
1088
raise NotImplementedError(self.set_make_working_trees)
1090
def make_working_trees(self):
1091
"""Returns the policy for making working trees on new branches."""
1092
raise NotImplementedError(self.make_working_trees)
1094
def sign_revision(self, revision_id, gpg_strategy):
1095
raise NotImplementedError(self.sign_revision)
1097
def verify_revision_signature(self, revision_id, gpg_strategy):
1098
"""Verify the signature on a revision.
1100
:param revision_id: the revision to verify
1101
:gpg_strategy: the GPGStrategy object to used
1103
:return: gpg.SIGNATURE_VALID or a failed SIGNATURE_ value
1105
raise NotImplementedError(self.verify_revision_signature)
1107
def verify_revision_signatures(self, revision_ids, gpg_strategy):
1108
"""Verify revision signatures for a number of revisions.
1110
:param revision_id: the revision to verify
1111
:gpg_strategy: the GPGStrategy object to used
1112
:return: Iterator over tuples with revision id, result and keys
1114
with self.lock_read():
1115
for revid in revision_ids:
1116
(result, key) = self.verify_revision_signature(revid, gpg_strategy)
1117
yield revid, result, key
1119
def has_signature_for_revision_id(self, revision_id):
1120
"""Query for a revision signature for revision_id in the repository."""
1121
raise NotImplementedError(self.has_signature_for_revision_id)
1123
def get_signature_text(self, revision_id):
1124
"""Return the text for a signature."""
1125
raise NotImplementedError(self.get_signature_text)
1127
def check(self, revision_ids=None, callback_refs=None, check_repo=True):
1128
"""Check consistency of all history of given revision_ids.
1130
Different repository implementations should override _check().
1132
:param revision_ids: A non-empty list of revision_ids whose ancestry
1133
will be checked. Typically the last revision_id of a branch.
1134
:param callback_refs: A dict of check-refs to resolve and callback
1135
the check/_check method on the items listed as wanting the ref.
1137
:param check_repo: If False do not check the repository contents, just
1138
calculate the data callback_refs requires and call them back.
1140
return self._check(revision_ids=revision_ids, callback_refs=callback_refs,
1141
check_repo=check_repo)
1143
def _check(self, revision_ids=None, callback_refs=None, check_repo=True):
1144
raise NotImplementedError(self.check)
1146
def _warn_if_deprecated(self, branch=None):
1147
if not self._format.is_deprecated():
1149
global _deprecation_warning_done
1150
if _deprecation_warning_done:
1154
conf = config.GlobalStack()
1156
conf = branch.get_config_stack()
1157
if 'format_deprecation' in conf.get('suppress_warnings'):
1159
warning("Format %s for %s is deprecated -"
1160
" please use 'brz upgrade' to get better performance"
1161
% (self._format, self.controldir.transport.base))
1163
_deprecation_warning_done = True
1165
def supports_rich_root(self):
1166
return self._format.rich_root_data
1168
def _check_ascii_revisionid(self, revision_id, method):
1169
"""Private helper for ascii-only repositories."""
1170
# weave repositories refuse to store revisionids that are non-ascii.
1171
if revision_id is not None:
1172
# weaves require ascii revision ids.
1173
if isinstance(revision_id, text_type):
1175
revision_id.encode('ascii')
1176
except UnicodeEncodeError:
1177
raise errors.NonAsciiRevisionId(method, self)
1180
revision_id.decode('ascii')
1181
except UnicodeDecodeError:
1182
raise errors.NonAsciiRevisionId(method, self)
1185
class RepositoryFormatRegistry(controldir.ControlComponentFormatRegistry):
1186
"""Repository format registry."""
1188
def get_default(self):
1189
"""Return the current default format."""
1190
return controldir.format_registry.make_controldir('default').repository_format
1193
network_format_registry = registry.FormatRegistry()
1194
"""Registry of formats indexed by their network name.
1196
The network name for a repository format is an identifier that can be used when
1197
referring to formats with smart server operations. See
1198
RepositoryFormat.network_name() for more detail.
1202
format_registry = RepositoryFormatRegistry(network_format_registry)
1203
"""Registry of formats, indexed by their BzrDirMetaFormat format string.
1205
This can contain either format instances themselves, or classes/factories that
1206
can be called to obtain one.
1210
#####################################################################
1211
# Repository Formats
1213
class RepositoryFormat(controldir.ControlComponentFormat):
1214
"""A repository format.
1216
Formats provide four things:
1217
* An initialization routine to construct repository data on disk.
1218
* a optional format string which is used when the BzrDir supports
1220
* an open routine which returns a Repository instance.
1221
* A network name for referring to the format in smart server RPC
1224
There is one and only one Format subclass for each on-disk format. But
1225
there can be one Repository subclass that is used for several different
1226
formats. The _format attribute on a Repository instance can be used to
1227
determine the disk format.
1229
Formats are placed in a registry by their format string for reference
1230
during opening. These should be subclasses of RepositoryFormat for
1233
Once a format is deprecated, just deprecate the initialize and open
1234
methods on the format class. Do not deprecate the object, as the
1235
object may be created even when a repository instance hasn't been
1238
Common instance attributes:
1239
_matchingcontroldir - the controldir format that the repository format was
1240
originally written to work with. This can be used if manually
1241
constructing a bzrdir and repository, or more commonly for test suite
1245
# Set to True or False in derived classes. True indicates that the format
1246
# supports ghosts gracefully.
1247
supports_ghosts = None
1248
# Can this repository be given external locations to lookup additional
1249
# data. Set to True or False in derived classes.
1250
supports_external_lookups = None
1251
# Does this format support CHK bytestring lookups. Set to True or False in
1253
supports_chks = None
1254
# Should fetch trigger a reconcile after the fetch? Only needed for
1255
# some repository formats that can suffer internal inconsistencies.
1256
_fetch_reconcile = False
1257
# Does this format have < O(tree_size) delta generation. Used to hint what
1258
# code path for commit, amongst other things.
1260
# Does doing a pack operation compress data? Useful for the pack UI command
1261
# (so if there is one pack, the operation can still proceed because it may
1262
# help), and for fetching when data won't have come from the same
1264
pack_compresses = False
1265
# Does the repository storage understand references to trees?
1266
supports_tree_reference = None
1267
# Is the format experimental ?
1268
experimental = False
1269
# Does this repository format escape funky characters, or does it create
1270
# files with similar names as the versioned files in its contents on disk
1272
supports_funky_characters = None
1273
# Does this repository format support leaving locks?
1274
supports_leaving_lock = None
1275
# Does this format support the full VersionedFiles interface?
1276
supports_full_versioned_files = None
1277
# Does this format support signing revision signatures?
1278
supports_revision_signatures = True
1279
# Can the revision graph have incorrect parents?
1280
revision_graph_can_have_wrong_parents = None
1281
# Does this format support setting revision ids?
1282
supports_setting_revision_ids = True
1283
# Does this format support rich root data?
1284
rich_root_data = None
1285
# Does this format support explicitly versioned directories?
1286
supports_versioned_directories = None
1287
# Can other repositories be nested into one of this format?
1288
supports_nesting_repositories = None
1289
# Is it possible for revisions to be present without being referenced
1291
supports_unreferenced_revisions = None
1292
# Does this format store the current Branch.nick in a revision when
1294
supports_storing_branch_nick = True
1295
# Does the format support overriding the transport to use
1296
supports_overriding_transport = True
1297
# Does the format support setting custom revision properties?
1298
supports_custom_revision_properties = True
1299
# Does the format record per-file revision metadata?
1300
records_per_file_revision = True
1303
return "%s()" % self.__class__.__name__
1305
def __eq__(self, other):
1306
# format objects are generally stateless
1307
return isinstance(other, self.__class__)
1309
def __ne__(self, other):
1310
return not self == other
1312
def get_format_description(self):
1313
"""Return the short description for this format."""
1314
raise NotImplementedError(self.get_format_description)
1316
def initialize(self, controldir, shared=False):
1317
"""Initialize a repository of this format in controldir.
1319
:param controldir: The controldir to put the new repository in it.
1320
:param shared: The repository should be initialized as a sharable one.
1321
:returns: The new repository object.
1323
This may raise UninitializableFormat if shared repository are not
1324
compatible the controldir.
1326
raise NotImplementedError(self.initialize)
1328
def is_supported(self):
1329
"""Is this format supported?
1331
Supported formats must be initializable and openable.
1332
Unsupported formats may not support initialization or committing or
1333
some other features depending on the reason for not being supported.
1337
def is_deprecated(self):
1338
"""Is this format deprecated?
1340
Deprecated formats may trigger a user-visible warning recommending
1341
the user to upgrade. They are still fully supported.
1345
def network_name(self):
1346
"""A simple byte string uniquely identifying this format for RPC calls.
1348
MetaDir repository formats use their disk format string to identify the
1349
repository over the wire. All in one formats such as bzr < 0.8, and
1350
foreign formats like svn/git and hg should use some marker which is
1351
unique and immutable.
1353
raise NotImplementedError(self.network_name)
1355
def check_conversion_target(self, target_format):
1356
if self.rich_root_data and not target_format.rich_root_data:
1357
raise errors.BadConversionTarget(
1358
'Does not support rich root data.', target_format,
1360
if (self.supports_tree_reference
1361
and not getattr(target_format, 'supports_tree_reference', False)):
1362
raise errors.BadConversionTarget(
1363
'Does not support nested trees', target_format,
1366
def open(self, controldir, _found=False):
1367
"""Return an instance of this format for a controldir.
1369
_found is a private parameter, do not use it.
1371
raise NotImplementedError(self.open)
1373
def _run_post_repo_init_hooks(self, repository, controldir, shared):
1374
from .controldir import ControlDir, RepoInitHookParams
1375
hooks = ControlDir.hooks['post_repo_init']
1378
params = RepoInitHookParams(repository, self, controldir, shared)
1383
# formats which have no format string are not discoverable or independently
1384
# creatable on disk, so are not registered in format_registry. They're
1385
# all in breezy.bzr.knitreponow. When an instance of one of these is
1386
# needed, it's constructed directly by the ControlDir. Non-native formats where
1387
# the repository is not separately opened are similar.
1389
format_registry.register_lazy(
1390
b'Bazaar-NG Knit Repository Format 1',
1391
'breezy.bzr.knitrepo',
1392
'RepositoryFormatKnit1',
1395
format_registry.register_lazy(
1396
b'Bazaar Knit Repository Format 3 (bzr 0.15)\n',
1397
'breezy.bzr.knitrepo',
1398
'RepositoryFormatKnit3',
1401
format_registry.register_lazy(
1402
b'Bazaar Knit Repository Format 4 (bzr 1.0)\n',
1403
'breezy.bzr.knitrepo',
1404
'RepositoryFormatKnit4',
1407
# Pack-based formats. There is one format for pre-subtrees, and one for
1408
# post-subtrees to allow ease of testing.
1409
# NOTE: These are experimental in 0.92. Stable in 1.0 and above
1410
format_registry.register_lazy(
1411
b'Bazaar pack repository format 1 (needs bzr 0.92)\n',
1412
'breezy.bzr.knitpack_repo',
1413
'RepositoryFormatKnitPack1',
1415
format_registry.register_lazy(
1416
b'Bazaar pack repository format 1 with subtree support (needs bzr 0.92)\n',
1417
'breezy.bzr.knitpack_repo',
1418
'RepositoryFormatKnitPack3',
1420
format_registry.register_lazy(
1421
b'Bazaar pack repository format 1 with rich root (needs bzr 1.0)\n',
1422
'breezy.bzr.knitpack_repo',
1423
'RepositoryFormatKnitPack4',
1425
format_registry.register_lazy(
1426
b'Bazaar RepositoryFormatKnitPack5 (bzr 1.6)\n',
1427
'breezy.bzr.knitpack_repo',
1428
'RepositoryFormatKnitPack5',
1430
format_registry.register_lazy(
1431
b'Bazaar RepositoryFormatKnitPack5RichRoot (bzr 1.6.1)\n',
1432
'breezy.bzr.knitpack_repo',
1433
'RepositoryFormatKnitPack5RichRoot',
1435
format_registry.register_lazy(
1436
b'Bazaar RepositoryFormatKnitPack5RichRoot (bzr 1.6)\n',
1437
'breezy.bzr.knitpack_repo',
1438
'RepositoryFormatKnitPack5RichRootBroken',
1440
format_registry.register_lazy(
1441
b'Bazaar RepositoryFormatKnitPack6 (bzr 1.9)\n',
1442
'breezy.bzr.knitpack_repo',
1443
'RepositoryFormatKnitPack6',
1445
format_registry.register_lazy(
1446
b'Bazaar RepositoryFormatKnitPack6RichRoot (bzr 1.9)\n',
1447
'breezy.bzr.knitpack_repo',
1448
'RepositoryFormatKnitPack6RichRoot',
1450
format_registry.register_lazy(
1451
b'Bazaar repository format 2a (needs bzr 1.16 or later)\n',
1452
'breezy.bzr.groupcompress_repo',
1453
'RepositoryFormat2a',
1456
# Development formats.
1457
# Check their docstrings to see if/when they are obsolete.
1458
format_registry.register_lazy(
1459
(b"Bazaar development format 2 with subtree support "
1460
b"(needs bzr.dev from before 1.8)\n"),
1461
'breezy.bzr.knitpack_repo',
1462
'RepositoryFormatPackDevelopment2Subtree',
1464
format_registry.register_lazy(
1465
b'Bazaar development format 8\n',
1466
'breezy.bzr.groupcompress_repo',
1467
'RepositoryFormat2aSubtree',
1471
class InterRepository(InterObject):
1472
"""This class represents operations taking place between two repositories.
1474
Its instances have methods like copy_content and fetch, and contain
1475
references to the source and target repositories these operations can be
1478
Often we will provide convenience methods on 'repository' which carry out
1479
operations with another repository - they will always forward to
1480
InterRepository.get(other).method_name(parameters).
1484
"""The available optimised InterRepository types."""
1486
def copy_content(self, revision_id=None):
1487
"""Make a complete copy of the content in self into destination.
1489
This is a destructive operation! Do not use it on existing
1492
:param revision_id: Only copy the content needed to construct
1493
revision_id and its parents.
1495
with self.lock_write():
1497
self.target.set_make_working_trees(
1498
self.source.make_working_trees())
1499
except NotImplementedError:
1501
self.target.fetch(self.source, revision_id=revision_id)
1503
def fetch(self, revision_id=None, find_ghosts=False):
1504
"""Fetch the content required to construct revision_id.
1506
The content is copied from self.source to self.target.
1508
:param revision_id: if None all content is copied, if NULL_REVISION no
1512
raise NotImplementedError(self.fetch)
1514
def search_missing_revision_ids(
1515
self, find_ghosts=True, revision_ids=None, if_present_ids=None,
1517
"""Return the revision ids that source has that target does not.
1519
:param revision_ids: return revision ids included by these
1520
revision_ids. NoSuchRevision will be raised if any of these
1521
revisions are not present.
1522
:param if_present_ids: like revision_ids, but will not cause
1523
NoSuchRevision if any of these are absent, instead they will simply
1524
not be in the result. This is useful for e.g. finding revisions
1525
to fetch for tags, which may reference absent revisions.
1526
:param find_ghosts: If True find missing revisions in deep history
1527
rather than just finding the surface difference.
1528
:param limit: Maximum number of revisions to return, topologically
1530
:return: A breezy.graph.SearchResult.
1532
raise NotImplementedError(self.search_missing_revision_ids)
1535
def _same_model(source, target):
1536
"""True if source and target have the same data representation.
1538
Note: this is always called on the base class; overriding it in a
1539
subclass will have no effect.
1542
InterRepository._assert_same_model(source, target)
1544
except errors.IncompatibleRepositories as e:
1548
def _assert_same_model(source, target):
1549
"""Raise an exception if two repositories do not use the same model.
1551
if source.supports_rich_root() != target.supports_rich_root():
1552
raise errors.IncompatibleRepositories(source, target,
1553
"different rich-root support")
1554
if source._serializer != target._serializer:
1555
raise errors.IncompatibleRepositories(source, target,
1556
"different serializers")
1559
class CopyConverter(object):
1560
"""A repository conversion tool which just performs a copy of the content.
1562
This is slow but quite reliable.
1565
def __init__(self, target_format):
1566
"""Create a CopyConverter.
1568
:param target_format: The format the resulting repository should be.
1570
self.target_format = target_format
1572
def convert(self, repo, pb):
1573
"""Perform the conversion of to_convert, giving feedback via pb.
1575
:param to_convert: The disk object to convert.
1576
:param pb: a progress bar to use for progress information.
1578
with ui.ui_factory.nested_progress_bar() as pb:
1581
# this is only useful with metadir layouts - separated repo content.
1582
# trigger an assertion if not such
1583
repo._format.get_format_string()
1584
self.repo_dir = repo.controldir
1585
pb.update(gettext('Moving repository to repository.backup'))
1586
self.repo_dir.transport.move('repository', 'repository.backup')
1587
backup_transport = self.repo_dir.transport.clone(
1588
'repository.backup')
1589
repo._format.check_conversion_target(self.target_format)
1590
self.source_repo = repo._format.open(self.repo_dir,
1592
_override_transport=backup_transport)
1593
pb.update(gettext('Creating new repository'))
1594
converted = self.target_format.initialize(self.repo_dir,
1595
self.source_repo.is_shared())
1596
with converted.lock_write():
1597
pb.update(gettext('Copying content'))
1598
self.source_repo.copy_content_into(converted)
1599
pb.update(gettext('Deleting old repository content'))
1600
self.repo_dir.transport.delete_tree('repository.backup')
1601
ui.ui_factory.note(gettext('repository converted'))
1604
def _strip_NULL_ghosts(revision_graph):
1605
"""Also don't use this. more compatibility code for unmigrated clients."""
1606
# Filter ghosts, and null:
1607
if _mod_revision.NULL_REVISION in revision_graph:
1608
del revision_graph[_mod_revision.NULL_REVISION]
1609
for key, parents in viewitems(revision_graph):
1610
revision_graph[key] = tuple(parent for parent in parents if parent
1612
return revision_graph
1615
def _iter_for_revno(repo, partial_history_cache, stop_index=None,
1616
stop_revision=None):
1617
"""Extend the partial history to include a given index
1619
If a stop_index is supplied, stop when that index has been reached.
1620
If a stop_revision is supplied, stop when that revision is
1621
encountered. Otherwise, stop when the beginning of history is
1624
:param stop_index: The index which should be present. When it is
1625
present, history extension will stop.
1626
:param stop_revision: The revision id which should be present. When
1627
it is encountered, history extension will stop.
1629
start_revision = partial_history_cache[-1]
1630
graph = repo.get_graph()
1631
iterator = graph.iter_lefthand_ancestry(start_revision,
1632
(_mod_revision.NULL_REVISION,))
1634
# skip the last revision in the list
1637
if (stop_index is not None and
1638
len(partial_history_cache) > stop_index):
1640
if partial_history_cache[-1] == stop_revision:
1642
revision_id = next(iterator)
1643
partial_history_cache.append(revision_id)
1644
except StopIteration:
1649
class _LazyListJoin(object):
1650
"""An iterable yielding the contents of many lists as one list.
1652
Each iterator made from this will reflect the current contents of the lists
1653
at the time the iterator is made.
1655
This is used by Repository's _make_parents_provider implementation so that
1658
pp = repo._make_parents_provider() # uses a list of fallback repos
1659
pp.add_fallback_repository(other_repo) # appends to that list
1660
result = pp.get_parent_map(...)
1661
# The result will include revs from other_repo
1664
def __init__(self, *list_parts):
1665
self.list_parts = list_parts
1669
for list_part in self.list_parts:
1670
full_list.extend(list_part)
1671
return iter(full_list)
1674
return "%s.%s(%s)" % (self.__module__, self.__class__.__name__,
added
removed
breezy/repository.py
