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# Copyright (C) 2005, 2006 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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from copy import deepcopy
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from cStringIO import StringIO
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from unittest import TestSuite
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import xml.sax.saxutils
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import bzrlib.bzrdir as bzrdir
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from bzrlib.decorators import needs_read_lock, needs_write_lock
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import bzrlib.errors as errors
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from bzrlib.errors import InvalidRevisionId
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import bzrlib.gpg as gpg
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from bzrlib.inter import InterObject
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from bzrlib.knit import KnitVersionedFile
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from bzrlib.lockable_files import LockableFiles, TransportLock
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from bzrlib.lockdir import LockDir
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from bzrlib.osutils import safe_unicode
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from bzrlib.revision import NULL_REVISION
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from bzrlib.store.versioned import VersionedFileStore, WeaveStore
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from bzrlib.store.text import TextStore
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from bzrlib.symbol_versioning import *
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from bzrlib.trace import mutter
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from bzrlib.tree import RevisionTree
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from bzrlib.tsort import topo_sort
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from bzrlib.testament import Testament
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from bzrlib.tree import EmptyTree
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from bzrlib.weave import WeaveFile
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class Repository(object):
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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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The Repository builds on top of Stores and a Transport, which respectively
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describe the disk data format and the way of accessing the (possibly
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def add_inventory(self, revid, inv, parents):
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"""Add the inventory inv to the repository as revid.
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:param parents: The revision ids of the parents that revid
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is known to have and are in the repository already.
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returns the sha1 of the serialized inventory.
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inv_text = bzrlib.xml5.serializer_v5.write_inventory_to_string(inv)
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inv_sha1 = bzrlib.osutils.sha_string(inv_text)
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inv_vf = self.control_weaves.get_weave('inventory',
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self.get_transaction())
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inv_vf.add_lines(revid, parents, bzrlib.osutils.split_lines(inv_text))
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def add_revision(self, rev_id, rev, inv=None, config=None):
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"""Add rev to the revision store as rev_id.
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:param rev_id: the revision id to use.
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:param rev: The revision object.
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:param inv: The inventory for the revision. if None, it will be looked
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up in the inventory storer
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:param config: If None no digital signature will be created.
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If supplied its signature_needed method will be used
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to determine if a signature should be made.
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if config is not None and config.signature_needed():
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inv = self.get_inventory(rev_id)
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plaintext = Testament(rev, inv).as_short_text()
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self.store_revision_signature(
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gpg.GPGStrategy(config), plaintext, rev_id)
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if not rev_id in self.get_inventory_weave():
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raise errors.WeaveRevisionNotPresent(rev_id,
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self.get_inventory_weave())
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# yes, this is not suitable for adding with ghosts.
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self.add_inventory(rev_id, inv, rev.parent_ids)
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self._revision_store.add_revision(rev, self.get_transaction())
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def _all_possible_ids(self):
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"""Return all the possible revisions that we could find."""
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return self.get_inventory_weave().versions()
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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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present: for weaves ghosts may lead to a lack of correctness until
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the reweave updates the parents list.
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if self._revision_store.text_store.listable():
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return self._revision_store.all_revision_ids(self.get_transaction())
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result = self._all_possible_ids()
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return self._eliminate_revisions_not_present(result)
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def _eliminate_revisions_not_present(self, revision_ids):
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"""Check every revision id in revision_ids to see if we have it.
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Returns a set of the present revisions.
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for id in revision_ids:
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if self.has_revision(id):
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def create(a_bzrdir):
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"""Construct the current default format repository in a_bzrdir."""
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return RepositoryFormat.get_default_format().initialize(a_bzrdir)
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def __init__(self, _format, a_bzrdir, control_files, _revision_store, control_store, text_store):
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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 a_bzrdir: The BzrDir of the repository.
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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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object.__init__(self)
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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.bzrdir = a_bzrdir
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self.control_files = control_files
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self._revision_store = _revision_store
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self.text_store = text_store
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# backwards compatability
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self.weave_store = text_store
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# not right yet - should be more semantically clear ?
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self.control_store = control_store
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self.control_weaves = control_store
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def lock_write(self):
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self.control_files.lock_write()
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self.control_files.lock_read()
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return self.control_files.is_locked()
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def missing_revision_ids(self, other, revision_id=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_id: only return revision ids included by revision_id.
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return InterRepository.get(other, self).missing_revision_ids(revision_id)
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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 = bzrlib.bzrdir.BzrDir.open(base)
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return control.open_repository()
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def copy_content_into(self, destination, revision_id=None, basis=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, basis)
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def fetch(self, source, revision_id=None, pb=None):
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"""Fetch the content required to construct revision_id from source.
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If revision_id is None all content is copied.
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return InterRepository.get(source, self).fetch(revision_id=revision_id,
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self.control_files.unlock()
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def clone(self, a_bzrdir, revision_id=None, basis=None):
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"""Clone this repository into a_bzrdir 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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if not isinstance(a_bzrdir._format, self.bzrdir._format.__class__):
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# use target default format.
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result = a_bzrdir.create_repository()
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# FIXME RBC 20060209 split out the repository type to avoid this check ?
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elif isinstance(a_bzrdir._format,
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(bzrlib.bzrdir.BzrDirFormat4,
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bzrlib.bzrdir.BzrDirFormat5,
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bzrlib.bzrdir.BzrDirFormat6)):
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result = a_bzrdir.open_repository()
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result = self._format.initialize(a_bzrdir, shared=self.is_shared())
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self.copy_content_into(result, revision_id, basis)
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def has_revision(self, revision_id):
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"""True if this repository has a copy of the revision."""
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return self._revision_store.has_revision_id(revision_id,
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self.get_transaction())
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def get_revision_reconcile(self, revision_id):
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"""'reconcile' helper routine that allows access to a revision always.
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This variant of get_revision does not cross check the weave graph
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against the revision one as get_revision does: but it should only
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be used by reconcile, or reconcile-alike commands that are correcting
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or testing the revision graph.
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if not revision_id or not isinstance(revision_id, basestring):
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raise InvalidRevisionId(revision_id=revision_id, branch=self)
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return self._revision_store.get_revision(revision_id,
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self.get_transaction())
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def get_revision_xml(self, revision_id):
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rev = self.get_revision(revision_id)
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# the current serializer..
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self._revision_store._serializer.write_revision(rev, rev_tmp)
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return rev_tmp.getvalue()
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def get_revision(self, revision_id):
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"""Return the Revision object for a named revision"""
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r = self.get_revision_reconcile(revision_id)
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# weave corruption can lead to absent revision markers that should be
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# the following test is reasonably cheap (it needs a single weave read)
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# and the weave is cached in read transactions. In write transactions
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# it is not cached but typically we only read a small number of
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# revisions. For knits when they are introduced we will probably want
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# to ensure that caching write transactions are in use.
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inv = self.get_inventory_weave()
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self._check_revision_parents(r, inv)
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def _check_revision_parents(self, revision, inventory):
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"""Private to Repository and Fetch.
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This checks the parentage of revision in an inventory weave for
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consistency and is only applicable to inventory-weave-for-ancestry
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using repository formats & fetchers.
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weave_parents = inventory.get_parents(revision.revision_id)
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weave_names = inventory.versions()
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for parent_id in revision.parent_ids:
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if parent_id in weave_names:
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# this parent must not be a ghost.
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if not parent_id in weave_parents:
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raise errors.CorruptRepository(self)
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def store_revision_signature(self, gpg_strategy, plaintext, revision_id):
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signature = gpg_strategy.sign(plaintext)
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self._revision_store.add_revision_signature_text(revision_id,
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self.get_transaction())
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def fileid_involved_between_revs(self, from_revid, to_revid):
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"""Find file_id(s) which are involved in the changes between revisions.
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This determines the set of revisions which are involved, and then
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finds all file ids affected by those revisions.
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# TODO: jam 20060119 This code assumes that w.inclusions will
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# always be correct. But because of the presence of ghosts
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# it is possible to be wrong.
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# One specific example from Robert Collins:
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# Two branches, with revisions ABC, and AD
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# C is a ghost merge of D.
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# Inclusions doesn't recognize D as an ancestor.
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# If D is ever merged in the future, the weave
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# won't be fixed, because AD never saw revision C
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# to cause a conflict which would force a reweave.
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w = self.get_inventory_weave()
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from_set = set(w.get_ancestry(from_revid))
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to_set = set(w.get_ancestry(to_revid))
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changed = to_set.difference(from_set)
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return self._fileid_involved_by_set(changed)
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def fileid_involved(self, last_revid=None):
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"""Find all file_ids modified in the ancestry of last_revid.
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:param last_revid: If None, last_revision() will be used.
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w = self.get_inventory_weave()
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changed = set(w.versions())
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changed = set(w.get_ancestry(last_revid))
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return self._fileid_involved_by_set(changed)
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def fileid_involved_by_set(self, changes):
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"""Find all file_ids modified by the set of revisions passed in.
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:param changes: A set() of revision ids
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# TODO: jam 20060119 This line does *nothing*, remove it.
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# or better yet, change _fileid_involved_by_set so
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# that it takes the inventory weave, rather than
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# pulling it out by itself.
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return self._fileid_involved_by_set(changes)
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def _fileid_involved_by_set(self, changes):
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"""Find the set of file-ids affected by the set of revisions.
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:param changes: A set() of revision ids.
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:return: A set() of file ids.
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This peaks at the Weave, interpreting each line, looking to
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see if it mentions one of the revisions. And if so, includes
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the file id mentioned.
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This expects both the Weave format, and the serialization
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to have a single line per file/directory, and to have
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fileid="" and revision="" on that line.
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assert isinstance(self._format, (RepositoryFormat5,
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RepositoryFormatKnit1)), \
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"fileid_involved only supported for branches which store inventory as unnested xml"
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w = self.get_inventory_weave()
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for lineno, insert, deletes, line in w.walk(changes):
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start = line.find('file_id="')+9
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if start < 9: continue
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end = line.find('"', start)
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file_id = xml.sax.saxutils.unescape(line[start:end])
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# check if file_id is already present
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if file_id in file_ids: continue
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start = line.find('revision="')+10
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if start < 10: continue
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end = line.find('"', start)
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revision_id = xml.sax.saxutils.unescape(line[start:end])
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if revision_id in changes:
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file_ids.add(file_id)
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def get_inventory_weave(self):
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return self.control_weaves.get_weave('inventory',
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self.get_transaction())
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def get_inventory(self, revision_id):
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"""Get Inventory object by hash."""
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xml = self.get_inventory_xml(revision_id)
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return bzrlib.xml5.serializer_v5.read_inventory_from_string(xml)
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def get_inventory_xml(self, revision_id):
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"""Get inventory XML as a file object."""
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assert isinstance(revision_id, basestring), type(revision_id)
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iw = self.get_inventory_weave()
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return iw.get_text(revision_id)
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raise bzrlib.errors.HistoryMissing(self, 'inventory', revision_id)
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def get_inventory_sha1(self, revision_id):
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"""Return the sha1 hash of the inventory entry
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return self.get_revision(revision_id).inventory_sha1
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def get_revision_graph(self, revision_id=None):
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"""Return a dictionary containing the revision graph.
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:return: a dictionary of revision_id->revision_parents_list.
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weave = self.get_inventory_weave()
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all_revisions = self._eliminate_revisions_not_present(weave.versions())
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entire_graph = dict([(node, weave.get_parents(node)) for
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node in all_revisions])
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if revision_id is None:
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elif revision_id not in entire_graph:
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raise errors.NoSuchRevision(self, revision_id)
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# add what can be reached from revision_id
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pending = set([revision_id])
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while len(pending) > 0:
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result[node] = entire_graph[node]
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for revision_id in result[node]:
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if revision_id not in result:
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pending.add(revision_id)
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def get_revision_inventory(self, revision_id):
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"""Return inventory of a past revision."""
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# TODO: Unify this with get_inventory()
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# bzr 0.0.6 and later imposes the constraint that the inventory_id
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# must be the same as its revision, so this is trivial.
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if revision_id is None:
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# This does not make sense: if there is no revision,
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# then it is the current tree inventory surely ?!
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# and thus get_root_id() is something that looks at the last
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# commit on the branch, and the get_root_id is an inventory check.
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raise NotImplementedError
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# return Inventory(self.get_root_id())
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return self.get_inventory(revision_id)
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"""Return True if this repository is flagged as a shared repository."""
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# FIXME format 4-6 cannot be shared, this is technically faulty.
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return self.control_files._transport.has('shared-storage')
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def revision_tree(self, revision_id):
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"""Return Tree for a revision on this branch.
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`revision_id` may be None for the null revision, in which case
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an `EmptyTree` is returned."""
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# TODO: refactor this to use an existing revision object
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# so we don't need to read it in twice.
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if revision_id is None or revision_id == NULL_REVISION:
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inv = self.get_revision_inventory(revision_id)
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return RevisionTree(self, inv, revision_id)
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def get_ancestry(self, revision_id):
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"""Return a list of revision-ids integrated by a revision.
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This is topologically sorted.
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if revision_id is None:
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if not self.has_revision(revision_id):
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raise errors.NoSuchRevision(self, revision_id)
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w = self.get_inventory_weave()
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return [None] + w.get_ancestry(revision_id)
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def print_file(self, file, revision_id):
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"""Print `file` to stdout.
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FIXME RBC 20060125 as John Meinel points out this is a bad api
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- it writes to stdout, it assumes that that is valid etc. Fix
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by creating a new more flexible convenience function.
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tree = self.revision_tree(revision_id)
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# use inventory as it was in that revision
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file_id = tree.inventory.path2id(file)
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raise BzrError("%r is not present in revision %s" % (file, revno))
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revno = self.revision_id_to_revno(revision_id)
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except errors.NoSuchRevision:
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# TODO: This should not be BzrError,
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# but NoSuchFile doesn't fit either
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raise BzrError('%r is not present in revision %s'
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% (file, revision_id))
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raise BzrError('%r is not present in revision %s'
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tree.print_file(file_id)
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def get_transaction(self):
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return self.control_files.get_transaction()
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def revision_parents(self, revid):
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return self.get_inventory_weave().parent_names(revid)
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def set_make_working_trees(self, new_value):
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"""Set the policy flag for making working trees when creating branches.
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This only applies to branches that use this repository.
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The default is 'True'.
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:param new_value: True to restore the default, False to disable making
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# FIXME: split out into a new class/strategy ?
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if isinstance(self._format, (RepositoryFormat4,
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raise NotImplementedError(self.set_make_working_trees)
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self.control_files._transport.delete('no-working-trees')
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except errors.NoSuchFile:
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self.control_files.put_utf8('no-working-trees', '')
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def make_working_trees(self):
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"""Returns the policy for making working trees on new branches."""
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# FIXME: split out into a new class/strategy ?
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if isinstance(self._format, (RepositoryFormat4,
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return not self.control_files._transport.has('no-working-trees')
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def sign_revision(self, revision_id, gpg_strategy):
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plaintext = Testament.from_revision(self, revision_id).as_short_text()
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self.store_revision_signature(gpg_strategy, plaintext, revision_id)
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def has_signature_for_revision_id(self, revision_id):
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"""Query for a revision signature for revision_id in the repository."""
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return self._revision_store.has_signature(revision_id,
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self.get_transaction())
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def get_signature_text(self, revision_id):
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"""Return the text for a signature."""
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return self._revision_store.get_signature_text(revision_id,
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self.get_transaction())
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class AllInOneRepository(Repository):
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"""Legacy support - the repository behaviour for all-in-one branches."""
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def __init__(self, _format, a_bzrdir, _revision_store, control_store, text_store):
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# we reuse one control files instance.
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dir_mode = a_bzrdir._control_files._dir_mode
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file_mode = a_bzrdir._control_files._file_mode
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def get_weave(name, prefixed=False):
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name = safe_unicode(name)
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relpath = a_bzrdir._control_files._escape(name)
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weave_transport = a_bzrdir._control_files._transport.clone(relpath)
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ws = WeaveStore(weave_transport, prefixed=prefixed,
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if a_bzrdir._control_files._transport.should_cache():
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ws.enable_cache = True
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def get_store(name, compressed=True, prefixed=False):
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# FIXME: This approach of assuming stores are all entirely compressed
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# or entirely uncompressed is tidy, but breaks upgrade from
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# some existing branches where there's a mixture; we probably
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# still want the option to look for both.
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relpath = a_bzrdir._control_files._escape(name)
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store = TextStore(a_bzrdir._control_files._transport.clone(relpath),
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prefixed=prefixed, compressed=compressed,
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#if self._transport.should_cache():
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# cache_path = os.path.join(self.cache_root, name)
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# os.mkdir(cache_path)
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# store = bzrlib.store.CachedStore(store, cache_path)
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# not broken out yet because the controlweaves|inventory_store
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# and text_store | weave_store bits are still different.
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if isinstance(_format, RepositoryFormat4):
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# cannot remove these - there is still no consistent api
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# which allows access to this old info.
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self.inventory_store = get_store('inventory-store')
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text_store = get_store('text-store')
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super(AllInOneRepository, self).__init__(_format, a_bzrdir, a_bzrdir._control_files, _revision_store, control_store, text_store)
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class MetaDirRepository(Repository):
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"""Repositories in the new meta-dir layout."""
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def __init__(self, _format, a_bzrdir, control_files, _revision_store, control_store, text_store):
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super(MetaDirRepository, self).__init__(_format,
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dir_mode = self.control_files._dir_mode
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file_mode = self.control_files._file_mode
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def get_weave(name, prefixed=False):
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name = safe_unicode(name)
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relpath = self.control_files._escape(name)
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weave_transport = self.control_files._transport.clone(relpath)
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ws = WeaveStore(weave_transport, prefixed=prefixed,
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if self.control_files._transport.should_cache():
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ws.enable_cache = True
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class KnitRepository(MetaDirRepository):
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"""Knit format repository."""
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def all_revision_ids(self):
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"""See Repository.all_revision_ids()."""
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return self._revision_store.all_revision_ids(self.get_transaction())
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class RepositoryFormat(object):
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"""A repository format.
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Formats provide three things:
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* An initialization routine to construct repository data on disk.
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* a format string which is used when the BzrDir supports versioned
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* an open routine which returns a Repository instance.
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Formats are placed in an dict by their format string for reference
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during opening. These should be subclasses of RepositoryFormat
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Once a format is deprecated, just deprecate the initialize and open
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methods on the format class. Do not deprecate the object, as the
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object will be created every system load.
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Common instance attributes:
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_matchingbzrdir - the bzrdir format that the repository format was
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originally written to work with. This can be used if manually
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constructing a bzrdir and repository, or more commonly for test suite
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_default_format = None
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"""The default format used for new repositories."""
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"""The known formats."""
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def find_format(klass, a_bzrdir):
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"""Return the format for the repository object in a_bzrdir."""
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transport = a_bzrdir.get_repository_transport(None)
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format_string = transport.get("format").read()
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return klass._formats[format_string]
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except errors.NoSuchFile:
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raise errors.NoRepositoryPresent(a_bzrdir)
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raise errors.UnknownFormatError(format_string)
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def _get_control_store(self, repo_transport, control_files):
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"""Return the control store for this repository."""
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raise NotImplementedError(self._get_control_store)
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def get_default_format(klass):
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"""Return the current default format."""
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return klass._default_format
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def get_format_string(self):
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"""Return the ASCII format string that identifies this format.
706
Note that in pre format ?? repositories the format string is
707
not permitted nor written to disk.
709
raise NotImplementedError(self.get_format_string)
711
def _get_revision_store(self, repo_transport, control_files):
712
"""Return the revision store object for this a_bzrdir."""
713
raise NotImplementedError(self._get_revision_store)
715
def _get_text_rev_store(self,
722
"""Common logic for getting a revision store for a repository.
724
see self._get_revision_store for the subclass-overridable method to
725
get the store for a repository.
727
from bzrlib.store.revision.text import TextRevisionStore
728
dir_mode = control_files._dir_mode
729
file_mode = control_files._file_mode
730
text_store =TextStore(transport.clone(name),
732
compressed=compressed,
735
_revision_store = TextRevisionStore(text_store, serializer)
736
return _revision_store
738
def _get_versioned_file_store(self,
743
versionedfile_class=WeaveFile):
744
weave_transport = control_files._transport.clone(name)
745
dir_mode = control_files._dir_mode
746
file_mode = control_files._file_mode
747
return VersionedFileStore(weave_transport, prefixed=prefixed,
750
versionedfile_class=versionedfile_class)
752
def initialize(self, a_bzrdir, shared=False):
753
"""Initialize a repository of this format in a_bzrdir.
755
:param a_bzrdir: The bzrdir to put the new repository in it.
756
:param shared: The repository should be initialized as a sharable one.
758
This may raise UninitializableFormat if shared repository are not
759
compatible the a_bzrdir.
762
def is_supported(self):
763
"""Is this format supported?
765
Supported formats must be initializable and openable.
766
Unsupported formats may not support initialization or committing or
767
some other features depending on the reason for not being supported.
771
def open(self, a_bzrdir, _found=False):
772
"""Return an instance of this format for the bzrdir a_bzrdir.
774
_found is a private parameter, do not use it.
776
raise NotImplementedError(self.open)
779
def register_format(klass, format):
780
klass._formats[format.get_format_string()] = format
783
def set_default_format(klass, format):
784
klass._default_format = format
787
def unregister_format(klass, format):
788
assert klass._formats[format.get_format_string()] is format
789
del klass._formats[format.get_format_string()]
792
class PreSplitOutRepositoryFormat(RepositoryFormat):
793
"""Base class for the pre split out repository formats."""
795
def initialize(self, a_bzrdir, shared=False, _internal=False):
796
"""Create a weave repository.
798
TODO: when creating split out bzr branch formats, move this to a common
799
base for Format5, Format6. or something like that.
801
from bzrlib.weavefile import write_weave_v5
802
from bzrlib.weave import Weave
805
raise errors.IncompatibleFormat(self, a_bzrdir._format)
808
# always initialized when the bzrdir is.
809
return self.open(a_bzrdir, _found=True)
811
# Create an empty weave
813
bzrlib.weavefile.write_weave_v5(Weave(), sio)
814
empty_weave = sio.getvalue()
816
mutter('creating repository in %s.', a_bzrdir.transport.base)
817
dirs = ['revision-store', 'weaves']
818
files = [('inventory.weave', StringIO(empty_weave)),
821
# FIXME: RBC 20060125 dont peek under the covers
822
# NB: no need to escape relative paths that are url safe.
823
control_files = LockableFiles(a_bzrdir.transport, 'branch-lock',
825
control_files.create_lock()
826
control_files.lock_write()
827
control_files._transport.mkdir_multi(dirs,
828
mode=control_files._dir_mode)
830
for file, content in files:
831
control_files.put(file, content)
833
control_files.unlock()
834
return self.open(a_bzrdir, _found=True)
836
def _get_control_store(self, repo_transport, control_files):
837
"""Return the control store for this repository."""
838
return self._get_versioned_file_store('',
843
def _get_text_store(self, transport, control_files):
844
"""Get a store for file texts for this format."""
845
raise NotImplementedError(self._get_text_store)
847
def open(self, a_bzrdir, _found=False):
848
"""See RepositoryFormat.open()."""
850
# we are being called directly and must probe.
851
raise NotImplementedError
853
repo_transport = a_bzrdir.get_repository_transport(None)
854
control_files = a_bzrdir._control_files
855
text_store = self._get_text_store(repo_transport, control_files)
856
control_store = self._get_control_store(repo_transport, control_files)
857
_revision_store = self._get_revision_store(repo_transport, control_files)
858
return AllInOneRepository(_format=self,
860
_revision_store=_revision_store,
861
control_store=control_store,
862
text_store=text_store)
865
class RepositoryFormat4(PreSplitOutRepositoryFormat):
866
"""Bzr repository format 4.
868
This repository format has:
870
- TextStores for texts, inventories,revisions.
872
This format is deprecated: it indexes texts using a text id which is
873
removed in format 5; initializationa and write support for this format
878
super(RepositoryFormat4, self).__init__()
879
self._matchingbzrdir = bzrlib.bzrdir.BzrDirFormat4()
881
def initialize(self, url, shared=False, _internal=False):
882
"""Format 4 branches cannot be created."""
883
raise errors.UninitializableFormat(self)
885
def is_supported(self):
886
"""Format 4 is not supported.
888
It is not supported because the model changed from 4 to 5 and the
889
conversion logic is expensive - so doing it on the fly was not
894
def _get_control_store(self, repo_transport, control_files):
895
"""Format 4 repositories have no formal control store at this point.
897
This will cause any control-file-needing apis to fail - this is desired.
901
def _get_revision_store(self, repo_transport, control_files):
902
"""See RepositoryFormat._get_revision_store()."""
903
from bzrlib.xml4 import serializer_v4
904
return self._get_text_rev_store(repo_transport,
907
serializer=serializer_v4)
909
def _get_text_store(self, transport, control_files):
910
"""See RepositoryFormat._get_text_store()."""
913
class RepositoryFormat5(PreSplitOutRepositoryFormat):
914
"""Bzr control format 5.
916
This repository format has:
917
- weaves for file texts and inventory
919
- TextStores for revisions and signatures.
923
super(RepositoryFormat5, self).__init__()
924
self._matchingbzrdir = bzrlib.bzrdir.BzrDirFormat5()
926
def _get_revision_store(self, repo_transport, control_files):
927
"""See RepositoryFormat._get_revision_store()."""
928
"""Return the revision store object for this a_bzrdir."""
929
return self._get_text_rev_store(repo_transport,
934
def _get_text_store(self, transport, control_files):
935
"""See RepositoryFormat._get_text_store()."""
936
return self._get_versioned_file_store('weaves', transport, control_files, prefixed=False)
939
class RepositoryFormat6(PreSplitOutRepositoryFormat):
940
"""Bzr control format 6.
942
This repository format has:
943
- weaves for file texts and inventory
944
- hash subdirectory based stores.
945
- TextStores for revisions and signatures.
949
super(RepositoryFormat6, self).__init__()
950
self._matchingbzrdir = bzrlib.bzrdir.BzrDirFormat6()
952
def _get_revision_store(self, repo_transport, control_files):
953
"""See RepositoryFormat._get_revision_store()."""
954
return self._get_text_rev_store(repo_transport,
960
def _get_text_store(self, transport, control_files):
961
"""See RepositoryFormat._get_text_store()."""
962
return self._get_versioned_file_store('weaves', transport, control_files)
965
class MetaDirRepositoryFormat(RepositoryFormat):
966
"""Common base class for the new repositories using the metadir layour."""
969
super(MetaDirRepositoryFormat, self).__init__()
970
self._matchingbzrdir = bzrlib.bzrdir.BzrDirMetaFormat1()
972
def _create_control_files(self, a_bzrdir):
973
"""Create the required files and the initial control_files object."""
974
# FIXME: RBC 20060125 dont peek under the covers
975
# NB: no need to escape relative paths that are url safe.
976
repository_transport = a_bzrdir.get_repository_transport(self)
977
control_files = LockableFiles(repository_transport, 'lock', LockDir)
978
control_files.create_lock()
981
def _upload_blank_content(self, a_bzrdir, dirs, files, utf8_files, shared):
982
"""Upload the initial blank content."""
983
control_files = self._create_control_files(a_bzrdir)
984
control_files.lock_write()
986
control_files._transport.mkdir_multi(dirs,
987
mode=control_files._dir_mode)
988
for file, content in files:
989
control_files.put(file, content)
990
for file, content in utf8_files:
991
control_files.put_utf8(file, content)
993
control_files.put_utf8('shared-storage', '')
995
control_files.unlock()
998
class RepositoryFormat7(MetaDirRepositoryFormat):
1001
This repository format has:
1002
- weaves for file texts and inventory
1003
- hash subdirectory based stores.
1004
- TextStores for revisions and signatures.
1005
- a format marker of its own
1006
- an optional 'shared-storage' flag
1007
- an optional 'no-working-trees' flag
1010
def _get_control_store(self, repo_transport, control_files):
1011
"""Return the control store for this repository."""
1012
return self._get_versioned_file_store('',
1017
def get_format_string(self):
1018
"""See RepositoryFormat.get_format_string()."""
1019
return "Bazaar-NG Repository format 7"
1021
def _get_revision_store(self, repo_transport, control_files):
1022
"""See RepositoryFormat._get_revision_store()."""
1023
return self._get_text_rev_store(repo_transport,
1030
def _get_text_store(self, transport, control_files):
1031
"""See RepositoryFormat._get_text_store()."""
1032
return self._get_versioned_file_store('weaves',
1036
def initialize(self, a_bzrdir, shared=False):
1037
"""Create a weave repository.
1039
:param shared: If true the repository will be initialized as a shared
1042
from bzrlib.weavefile import write_weave_v5
1043
from bzrlib.weave import Weave
1045
# Create an empty weave
1047
bzrlib.weavefile.write_weave_v5(Weave(), sio)
1048
empty_weave = sio.getvalue()
1050
mutter('creating repository in %s.', a_bzrdir.transport.base)
1051
dirs = ['revision-store', 'weaves']
1052
files = [('inventory.weave', StringIO(empty_weave)),
1054
utf8_files = [('format', self.get_format_string())]
1056
self._upload_blank_content(a_bzrdir, dirs, files, utf8_files, shared)
1057
return self.open(a_bzrdir=a_bzrdir, _found=True)
1059
def open(self, a_bzrdir, _found=False, _override_transport=None):
1060
"""See RepositoryFormat.open().
1062
:param _override_transport: INTERNAL USE ONLY. Allows opening the
1063
repository at a slightly different url
1064
than normal. I.e. during 'upgrade'.
1067
format = RepositoryFormat.find_format(a_bzrdir)
1068
assert format.__class__ == self.__class__
1069
if _override_transport is not None:
1070
repo_transport = _override_transport
1072
repo_transport = a_bzrdir.get_repository_transport(None)
1073
control_files = LockableFiles(repo_transport, 'lock', LockDir)
1074
text_store = self._get_text_store(repo_transport, control_files)
1075
control_store = self._get_control_store(repo_transport, control_files)
1076
_revision_store = self._get_revision_store(repo_transport, control_files)
1077
return MetaDirRepository(_format=self,
1079
control_files=control_files,
1080
_revision_store=_revision_store,
1081
control_store=control_store,
1082
text_store=text_store)
1085
class RepositoryFormatKnit1(MetaDirRepositoryFormat):
1086
"""Bzr repository knit format 1.
1088
This repository format has:
1089
- knits for file texts and inventory
1090
- hash subdirectory based stores.
1091
- knits for revisions and signatures
1092
- TextStores for revisions and signatures.
1093
- a format marker of its own
1094
- an optional 'shared-storage' flag
1095
- an optional 'no-working-trees' flag
1099
def _get_control_store(self, repo_transport, control_files):
1100
"""Return the control store for this repository."""
1101
return self._get_versioned_file_store('',
1105
versionedfile_class=KnitVersionedFile)
1107
def get_format_string(self):
1108
"""See RepositoryFormat.get_format_string()."""
1109
return "Bazaar-NG Knit Repository Format 1"
1111
def _get_revision_store(self, repo_transport, control_files):
1112
"""See RepositoryFormat._get_revision_store()."""
1113
from bzrlib.store.revision.knit import KnitRevisionStore
1114
versioned_file_store = VersionedFileStore(
1116
file_mode = control_files._file_mode,
1119
versionedfile_class=KnitVersionedFile)
1120
return KnitRevisionStore(versioned_file_store)
1122
def _get_text_store(self, transport, control_files):
1123
"""See RepositoryFormat._get_text_store()."""
1124
return self._get_versioned_file_store('knits',
1127
versionedfile_class=KnitVersionedFile)
1129
def initialize(self, a_bzrdir, shared=False):
1130
"""Create a knit format 1 repository.
1132
:param shared: If true the repository will be initialized as a shared
1134
XXX NOTE that this current uses a Weave for testing and will become
1135
A Knit in due course.
1137
from bzrlib.weavefile import write_weave_v5
1138
from bzrlib.weave import Weave
1140
# Create an empty weave
1142
bzrlib.weavefile.write_weave_v5(Weave(), sio)
1143
empty_weave = sio.getvalue()
1145
mutter('creating repository in %s.', a_bzrdir.transport.base)
1146
dirs = ['revision-store', 'knits', 'control']
1147
files = [('control/inventory.weave', StringIO(empty_weave)),
1149
utf8_files = [('format', self.get_format_string())]
1151
self._upload_blank_content(a_bzrdir, dirs, files, utf8_files, shared)
1152
repo_transport = a_bzrdir.get_repository_transport(None)
1153
control_files = LockableFiles(repo_transport, 'lock', LockDir)
1154
control_store = self._get_control_store(repo_transport, control_files)
1155
transaction = bzrlib.transactions.PassThroughTransaction()
1156
# trigger a write of the inventory store.
1157
control_store.get_weave_or_empty('inventory', transaction)
1158
_revision_store = self._get_revision_store(repo_transport, control_files)
1159
_revision_store.has_revision_id('A', transaction)
1160
_revision_store.get_signature_file(transaction)
1161
return self.open(a_bzrdir=a_bzrdir, _found=True)
1163
def open(self, a_bzrdir, _found=False, _override_transport=None):
1164
"""See RepositoryFormat.open().
1166
:param _override_transport: INTERNAL USE ONLY. Allows opening the
1167
repository at a slightly different url
1168
than normal. I.e. during 'upgrade'.
1171
format = RepositoryFormat.find_format(a_bzrdir)
1172
assert format.__class__ == self.__class__
1173
if _override_transport is not None:
1174
repo_transport = _override_transport
1176
repo_transport = a_bzrdir.get_repository_transport(None)
1177
control_files = LockableFiles(repo_transport, 'lock', LockDir)
1178
text_store = self._get_text_store(repo_transport, control_files)
1179
control_store = self._get_control_store(repo_transport, control_files)
1180
_revision_store = self._get_revision_store(repo_transport, control_files)
1181
return KnitRepository(_format=self,
1183
control_files=control_files,
1184
_revision_store=_revision_store,
1185
control_store=control_store,
1186
text_store=text_store)
1189
# formats which have no format string are not discoverable
1190
# and not independently creatable, so are not registered.
1191
_default_format = RepositoryFormat7()
1192
RepositoryFormat.register_format(_default_format)
1193
RepositoryFormat.register_format(RepositoryFormatKnit1())
1194
RepositoryFormat.set_default_format(_default_format)
1195
_legacy_formats = [RepositoryFormat4(),
1196
RepositoryFormat5(),
1197
RepositoryFormat6()]
1200
class InterRepository(InterObject):
1201
"""This class represents operations taking place between two repositories.
1203
Its instances have methods like copy_content and fetch, and contain
1204
references to the source and target repositories these operations can be
1207
Often we will provide convenience methods on 'repository' which carry out
1208
operations with another repository - they will always forward to
1209
InterRepository.get(other).method_name(parameters).
1213
"""The available optimised InterRepository types."""
1216
def copy_content(self, revision_id=None, basis=None):
1217
"""Make a complete copy of the content in self into destination.
1219
This is a destructive operation! Do not use it on existing
1222
:param revision_id: Only copy the content needed to construct
1223
revision_id and its parents.
1224
:param basis: Copy the needed data preferentially from basis.
1227
self.target.set_make_working_trees(self.source.make_working_trees())
1228
except NotImplementedError:
1230
# grab the basis available data
1231
if basis is not None:
1232
self.target.fetch(basis, revision_id=revision_id)
1233
# but dont bother fetching if we have the needed data now.
1234
if (revision_id not in (None, NULL_REVISION) and
1235
self.target.has_revision(revision_id)):
1237
self.target.fetch(self.source, revision_id=revision_id)
1239
def _double_lock(self, lock_source, lock_target):
1240
"""Take out too locks, rolling back the first if the second throws."""
1245
# we want to ensure that we don't leave source locked by mistake.
1246
# and any error on target should not confuse source.
1247
self.source.unlock()
1251
def fetch(self, revision_id=None, pb=None):
1252
"""Fetch the content required to construct revision_id.
1254
The content is copied from source to target.
1256
:param revision_id: if None all content is copied, if NULL_REVISION no
1258
:param pb: optional progress bar to use for progress reports. If not
1259
provided a default one will be created.
1261
Returns the copied revision count and the failed revisions in a tuple:
1264
from bzrlib.fetch import GenericRepoFetcher
1265
mutter("Using fetch logic to copy between %s(%s) and %s(%s)",
1266
self.source, self.source._format, self.target, self.target._format)
1267
f = GenericRepoFetcher(to_repository=self.target,
1268
from_repository=self.source,
1269
last_revision=revision_id,
1271
return f.count_copied, f.failed_revisions
1273
def lock_read(self):
1274
"""Take out a logical read lock.
1276
This will lock the source branch and the target branch. The source gets
1277
a read lock and the target a read lock.
1279
self._double_lock(self.source.lock_read, self.target.lock_read)
1281
def lock_write(self):
1282
"""Take out a logical write lock.
1284
This will lock the source branch and the target branch. The source gets
1285
a read lock and the target a write lock.
1287
self._double_lock(self.source.lock_read, self.target.lock_write)
1290
def missing_revision_ids(self, revision_id=None):
1291
"""Return the revision ids that source has that target does not.
1293
These are returned in topological order.
1295
:param revision_id: only return revision ids included by this
1298
# generic, possibly worst case, slow code path.
1299
target_ids = set(self.target.all_revision_ids())
1300
if revision_id is not None:
1301
source_ids = self.source.get_ancestry(revision_id)
1302
assert source_ids.pop(0) == None
1304
source_ids = self.source.all_revision_ids()
1305
result_set = set(source_ids).difference(target_ids)
1306
# this may look like a no-op: its not. It preserves the ordering
1307
# other_ids had while only returning the members from other_ids
1308
# that we've decided we need.
1309
return [rev_id for rev_id in source_ids if rev_id in result_set]
1312
"""Release the locks on source and target."""
1314
self.target.unlock()
1316
self.source.unlock()
1319
class InterWeaveRepo(InterRepository):
1320
"""Optimised code paths between Weave based repositories."""
1322
_matching_repo_format = _default_format
1323
"""Repository format for testing with."""
1326
def is_compatible(source, target):
1327
"""Be compatible with known Weave formats.
1329
We dont test for the stores being of specific types becase that
1330
could lead to confusing results, and there is no need to be
1334
return (isinstance(source._format, (RepositoryFormat5,
1336
RepositoryFormat7)) and
1337
isinstance(target._format, (RepositoryFormat5,
1339
RepositoryFormat7)))
1340
except AttributeError:
1344
def copy_content(self, revision_id=None, basis=None):
1345
"""See InterRepository.copy_content()."""
1346
# weave specific optimised path:
1347
if basis is not None:
1348
# copy the basis in, then fetch remaining data.
1349
basis.copy_content_into(self.target, revision_id)
1350
# the basis copy_content_into could misset this.
1352
self.target.set_make_working_trees(self.source.make_working_trees())
1353
except NotImplementedError:
1355
self.target.fetch(self.source, revision_id=revision_id)
1358
self.target.set_make_working_trees(self.source.make_working_trees())
1359
except NotImplementedError:
1361
# FIXME do not peek!
1362
if self.source.control_files._transport.listable():
1363
pb = bzrlib.ui.ui_factory.nested_progress_bar()
1365
self.target.weave_store.copy_all_ids(
1366
self.source.weave_store,
1368
from_transaction=self.source.get_transaction(),
1369
to_transaction=self.target.get_transaction())
1370
pb.update('copying inventory', 0, 1)
1371
self.target.control_weaves.copy_multi(
1372
self.source.control_weaves, ['inventory'],
1373
from_transaction=self.source.get_transaction(),
1374
to_transaction=self.target.get_transaction())
1375
self.target._revision_store.text_store.copy_all_ids(
1376
self.source._revision_store.text_store,
1381
self.target.fetch(self.source, revision_id=revision_id)
1384
def fetch(self, revision_id=None, pb=None):
1385
"""See InterRepository.fetch()."""
1386
from bzrlib.fetch import GenericRepoFetcher
1387
mutter("Using fetch logic to copy between %s(%s) and %s(%s)",
1388
self.source, self.source._format, self.target, self.target._format)
1389
f = GenericRepoFetcher(to_repository=self.target,
1390
from_repository=self.source,
1391
last_revision=revision_id,
1393
return f.count_copied, f.failed_revisions
1396
def missing_revision_ids(self, revision_id=None):
1397
"""See InterRepository.missing_revision_ids()."""
1398
# we want all revisions to satisfy revision_id in source.
1399
# but we dont want to stat every file here and there.
1400
# we want then, all revisions other needs to satisfy revision_id
1401
# checked, but not those that we have locally.
1402
# so the first thing is to get a subset of the revisions to
1403
# satisfy revision_id in source, and then eliminate those that
1404
# we do already have.
1405
# this is slow on high latency connection to self, but as as this
1406
# disk format scales terribly for push anyway due to rewriting
1407
# inventory.weave, this is considered acceptable.
1409
if revision_id is not None:
1410
source_ids = self.source.get_ancestry(revision_id)
1411
assert source_ids.pop(0) == None
1413
source_ids = self.source._all_possible_ids()
1414
source_ids_set = set(source_ids)
1415
# source_ids is the worst possible case we may need to pull.
1416
# now we want to filter source_ids against what we actually
1417
# have in target, but dont try to check for existence where we know
1418
# we do not have a revision as that would be pointless.
1419
target_ids = set(self.target._all_possible_ids())
1420
possibly_present_revisions = target_ids.intersection(source_ids_set)
1421
actually_present_revisions = set(self.target._eliminate_revisions_not_present(possibly_present_revisions))
1422
required_revisions = source_ids_set.difference(actually_present_revisions)
1423
required_topo_revisions = [rev_id for rev_id in source_ids if rev_id in required_revisions]
1424
if revision_id is not None:
1425
# we used get_ancestry to determine source_ids then we are assured all
1426
# revisions referenced are present as they are installed in topological order.
1427
# and the tip revision was validated by get_ancestry.
1428
return required_topo_revisions
1430
# if we just grabbed the possibly available ids, then
1431
# we only have an estimate of whats available and need to validate
1432
# that against the revision records.
1433
return self.source._eliminate_revisions_not_present(required_topo_revisions)
1436
class InterKnitRepo(InterRepository):
1437
"""Optimised code paths between Knit based repositories."""
1439
_matching_repo_format = RepositoryFormatKnit1()
1440
"""Repository format for testing with."""
1443
def is_compatible(source, target):
1444
"""Be compatible with known Knit formats.
1446
We dont test for the stores being of specific types becase that
1447
could lead to confusing results, and there is no need to be
1451
return (isinstance(source._format, (RepositoryFormatKnit1)) and
1452
isinstance(target._format, (RepositoryFormatKnit1)))
1453
except AttributeError:
1457
def fetch(self, revision_id=None, pb=None):
1458
"""See InterRepository.fetch()."""
1459
from bzrlib.fetch import KnitRepoFetcher
1460
mutter("Using fetch logic to copy between %s(%s) and %s(%s)",
1461
self.source, self.source._format, self.target, self.target._format)
1462
f = KnitRepoFetcher(to_repository=self.target,
1463
from_repository=self.source,
1464
last_revision=revision_id,
1466
return f.count_copied, f.failed_revisions
1469
def missing_revision_ids(self, revision_id=None):
1470
"""See InterRepository.missing_revision_ids()."""
1471
if revision_id is not None:
1472
source_ids = self.source.get_ancestry(revision_id)
1473
assert source_ids.pop(0) == None
1475
source_ids = self.source._all_possible_ids()
1476
source_ids_set = set(source_ids)
1477
# source_ids is the worst possible case we may need to pull.
1478
# now we want to filter source_ids against what we actually
1479
# have in target, but dont try to check for existence where we know
1480
# we do not have a revision as that would be pointless.
1481
target_ids = set(self.target._all_possible_ids())
1482
possibly_present_revisions = target_ids.intersection(source_ids_set)
1483
actually_present_revisions = set(self.target._eliminate_revisions_not_present(possibly_present_revisions))
1484
required_revisions = source_ids_set.difference(actually_present_revisions)
1485
required_topo_revisions = [rev_id for rev_id in source_ids if rev_id in required_revisions]
1486
if revision_id is not None:
1487
# we used get_ancestry to determine source_ids then we are assured all
1488
# revisions referenced are present as they are installed in topological order.
1489
# and the tip revision was validated by get_ancestry.
1490
return required_topo_revisions
1492
# if we just grabbed the possibly available ids, then
1493
# we only have an estimate of whats available and need to validate
1494
# that against the revision records.
1495
return self.source._eliminate_revisions_not_present(required_topo_revisions)
1497
InterRepository.register_optimiser(InterWeaveRepo)
1498
InterRepository.register_optimiser(InterKnitRepo)
1501
class RepositoryTestProviderAdapter(object):
1502
"""A tool to generate a suite testing multiple repository formats at once.
1504
This is done by copying the test once for each transport and injecting
1505
the transport_server, transport_readonly_server, and bzrdir_format and
1506
repository_format classes into each copy. Each copy is also given a new id()
1507
to make it easy to identify.
1510
def __init__(self, transport_server, transport_readonly_server, formats):
1511
self._transport_server = transport_server
1512
self._transport_readonly_server = transport_readonly_server
1513
self._formats = formats
1515
def adapt(self, test):
1516
result = TestSuite()
1517
for repository_format, bzrdir_format in self._formats:
1518
new_test = deepcopy(test)
1519
new_test.transport_server = self._transport_server
1520
new_test.transport_readonly_server = self._transport_readonly_server
1521
new_test.bzrdir_format = bzrdir_format
1522
new_test.repository_format = repository_format
1523
def make_new_test_id():
1524
new_id = "%s(%s)" % (new_test.id(), repository_format.__class__.__name__)
1525
return lambda: new_id
1526
new_test.id = make_new_test_id()
1527
result.addTest(new_test)
1531
class InterRepositoryTestProviderAdapter(object):
1532
"""A tool to generate a suite testing multiple inter repository formats.
1534
This is done by copying the test once for each interrepo provider and injecting
1535
the transport_server, transport_readonly_server, repository_format and
1536
repository_to_format classes into each copy.
1537
Each copy is also given a new id() to make it easy to identify.
1540
def __init__(self, transport_server, transport_readonly_server, formats):
1541
self._transport_server = transport_server
1542
self._transport_readonly_server = transport_readonly_server
1543
self._formats = formats
1545
def adapt(self, test):
1546
result = TestSuite()
1547
for interrepo_class, repository_format, repository_format_to in self._formats:
1548
new_test = deepcopy(test)
1549
new_test.transport_server = self._transport_server
1550
new_test.transport_readonly_server = self._transport_readonly_server
1551
new_test.interrepo_class = interrepo_class
1552
new_test.repository_format = repository_format
1553
new_test.repository_format_to = repository_format_to
1554
def make_new_test_id():
1555
new_id = "%s(%s)" % (new_test.id(), interrepo_class.__name__)
1556
return lambda: new_id
1557
new_test.id = make_new_test_id()
1558
result.addTest(new_test)
1562
def default_test_list():
1563
"""Generate the default list of interrepo permutations to test."""
1565
# test the default InterRepository between format 6 and the current
1567
# XXX: robertc 20060220 reinstate this when there are two supported
1568
# formats which do not have an optimal code path between them.
1569
result.append((InterRepository,
1570
RepositoryFormat6(),
1571
RepositoryFormatKnit1()))
1572
for optimiser in InterRepository._optimisers:
1573
result.append((optimiser,
1574
optimiser._matching_repo_format,
1575
optimiser._matching_repo_format
1577
# if there are specific combinations we want to use, we can add them
1582
class CopyConverter(object):
1583
"""A repository conversion tool which just performs a copy of the content.
1585
This is slow but quite reliable.
1588
def __init__(self, target_format):
1589
"""Create a CopyConverter.
1591
:param target_format: The format the resulting repository should be.
1593
self.target_format = target_format
1595
def convert(self, repo, pb):
1596
"""Perform the conversion of to_convert, giving feedback via pb.
1598
:param to_convert: The disk object to convert.
1599
:param pb: a progress bar to use for progress information.
1604
# this is only useful with metadir layouts - separated repo content.
1605
# trigger an assertion if not such
1606
repo._format.get_format_string()
1607
self.repo_dir = repo.bzrdir
1608
self.step('Moving repository to repository.backup')
1609
self.repo_dir.transport.move('repository', 'repository.backup')
1610
backup_transport = self.repo_dir.transport.clone('repository.backup')
1611
self.source_repo = repo._format.open(self.repo_dir,
1613
_override_transport=backup_transport)
1614
self.step('Creating new repository')
1615
converted = self.target_format.initialize(self.repo_dir,
1616
self.source_repo.is_shared())
1617
converted.lock_write()
1619
self.step('Copying content into repository.')
1620
self.source_repo.copy_content_into(converted)
1623
self.step('Deleting old repository content.')
1624
self.repo_dir.transport.delete_tree('repository.backup')
1625
self.pb.note('repository converted')
1627
def step(self, message):
1628
"""Update the pb by a step."""
1630
self.pb.update(message, self.count, self.total)
added
removed
bzrlib/repository.py
