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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.graph import Graph
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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_graph_with_ghosts(self, revision_ids=None):
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"""Return a graph of the revisions with ghosts marked as applicable.
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:param revision_ids: an iterable of revisions to graph or None for all.
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:return: a Graph object with the graph reachable from revision_ids.
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pending = set(self.all_revision_ids())
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pending = set(revision_ids)
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required = set(revision_ids)
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revision_id = pending.pop()
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rev = self.get_revision(revision_id)
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except errors.NoSuchRevision:
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if revision_id in required:
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result.add_ghost(revision_id)
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for parent_id in rev.parent_ids:
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# is this queued or done ?
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if (parent_id not in pending and
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parent_id not in done):
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pending.add(parent_id)
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result.add_node(revision_id, rev.parent_ids)
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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
708
constructing a bzrdir and repository, or more commonly for test suite
712
_default_format = None
713
"""The default format used for new repositories."""
716
"""The known formats."""
719
def find_format(klass, a_bzrdir):
720
"""Return the format for the repository object in a_bzrdir."""
722
transport = a_bzrdir.get_repository_transport(None)
723
format_string = transport.get("format").read()
724
return klass._formats[format_string]
725
except errors.NoSuchFile:
726
raise errors.NoRepositoryPresent(a_bzrdir)
728
raise errors.UnknownFormatError(format_string)
730
def _get_control_store(self, repo_transport, control_files):
731
"""Return the control store for this repository."""
732
raise NotImplementedError(self._get_control_store)
735
def get_default_format(klass):
736
"""Return the current default format."""
737
return klass._default_format
739
def get_format_string(self):
740
"""Return the ASCII format string that identifies this format.
742
Note that in pre format ?? repositories the format string is
743
not permitted nor written to disk.
745
raise NotImplementedError(self.get_format_string)
747
def _get_revision_store(self, repo_transport, control_files):
748
"""Return the revision store object for this a_bzrdir."""
749
raise NotImplementedError(self._get_revision_store)
751
def _get_text_rev_store(self,
758
"""Common logic for getting a revision store for a repository.
760
see self._get_revision_store for the subclass-overridable method to
761
get the store for a repository.
763
from bzrlib.store.revision.text import TextRevisionStore
764
dir_mode = control_files._dir_mode
765
file_mode = control_files._file_mode
766
text_store =TextStore(transport.clone(name),
768
compressed=compressed,
771
_revision_store = TextRevisionStore(text_store, serializer)
772
return _revision_store
774
def _get_versioned_file_store(self,
779
versionedfile_class=WeaveFile):
780
weave_transport = control_files._transport.clone(name)
781
dir_mode = control_files._dir_mode
782
file_mode = control_files._file_mode
783
return VersionedFileStore(weave_transport, prefixed=prefixed,
786
versionedfile_class=versionedfile_class)
788
def initialize(self, a_bzrdir, shared=False):
789
"""Initialize a repository of this format in a_bzrdir.
791
:param a_bzrdir: The bzrdir to put the new repository in it.
792
:param shared: The repository should be initialized as a sharable one.
794
This may raise UninitializableFormat if shared repository are not
795
compatible the a_bzrdir.
798
def is_supported(self):
799
"""Is this format supported?
801
Supported formats must be initializable and openable.
802
Unsupported formats may not support initialization or committing or
803
some other features depending on the reason for not being supported.
807
def open(self, a_bzrdir, _found=False):
808
"""Return an instance of this format for the bzrdir a_bzrdir.
810
_found is a private parameter, do not use it.
812
raise NotImplementedError(self.open)
815
def register_format(klass, format):
816
klass._formats[format.get_format_string()] = format
819
def set_default_format(klass, format):
820
klass._default_format = format
823
def unregister_format(klass, format):
824
assert klass._formats[format.get_format_string()] is format
825
del klass._formats[format.get_format_string()]
828
class PreSplitOutRepositoryFormat(RepositoryFormat):
829
"""Base class for the pre split out repository formats."""
831
def initialize(self, a_bzrdir, shared=False, _internal=False):
832
"""Create a weave repository.
834
TODO: when creating split out bzr branch formats, move this to a common
835
base for Format5, Format6. or something like that.
837
from bzrlib.weavefile import write_weave_v5
838
from bzrlib.weave import Weave
841
raise errors.IncompatibleFormat(self, a_bzrdir._format)
844
# always initialized when the bzrdir is.
845
return self.open(a_bzrdir, _found=True)
847
# Create an empty weave
849
bzrlib.weavefile.write_weave_v5(Weave(), sio)
850
empty_weave = sio.getvalue()
852
mutter('creating repository in %s.', a_bzrdir.transport.base)
853
dirs = ['revision-store', 'weaves']
854
files = [('inventory.weave', StringIO(empty_weave)),
857
# FIXME: RBC 20060125 dont peek under the covers
858
# NB: no need to escape relative paths that are url safe.
859
control_files = LockableFiles(a_bzrdir.transport, 'branch-lock',
861
control_files.create_lock()
862
control_files.lock_write()
863
control_files._transport.mkdir_multi(dirs,
864
mode=control_files._dir_mode)
866
for file, content in files:
867
control_files.put(file, content)
869
control_files.unlock()
870
return self.open(a_bzrdir, _found=True)
872
def _get_control_store(self, repo_transport, control_files):
873
"""Return the control store for this repository."""
874
return self._get_versioned_file_store('',
879
def _get_text_store(self, transport, control_files):
880
"""Get a store for file texts for this format."""
881
raise NotImplementedError(self._get_text_store)
883
def open(self, a_bzrdir, _found=False):
884
"""See RepositoryFormat.open()."""
886
# we are being called directly and must probe.
887
raise NotImplementedError
889
repo_transport = a_bzrdir.get_repository_transport(None)
890
control_files = a_bzrdir._control_files
891
text_store = self._get_text_store(repo_transport, control_files)
892
control_store = self._get_control_store(repo_transport, control_files)
893
_revision_store = self._get_revision_store(repo_transport, control_files)
894
return AllInOneRepository(_format=self,
896
_revision_store=_revision_store,
897
control_store=control_store,
898
text_store=text_store)
901
class RepositoryFormat4(PreSplitOutRepositoryFormat):
902
"""Bzr repository format 4.
904
This repository format has:
906
- TextStores for texts, inventories,revisions.
908
This format is deprecated: it indexes texts using a text id which is
909
removed in format 5; initializationa and write support for this format
914
super(RepositoryFormat4, self).__init__()
915
self._matchingbzrdir = bzrlib.bzrdir.BzrDirFormat4()
917
def initialize(self, url, shared=False, _internal=False):
918
"""Format 4 branches cannot be created."""
919
raise errors.UninitializableFormat(self)
921
def is_supported(self):
922
"""Format 4 is not supported.
924
It is not supported because the model changed from 4 to 5 and the
925
conversion logic is expensive - so doing it on the fly was not
930
def _get_control_store(self, repo_transport, control_files):
931
"""Format 4 repositories have no formal control store at this point.
933
This will cause any control-file-needing apis to fail - this is desired.
937
def _get_revision_store(self, repo_transport, control_files):
938
"""See RepositoryFormat._get_revision_store()."""
939
from bzrlib.xml4 import serializer_v4
940
return self._get_text_rev_store(repo_transport,
943
serializer=serializer_v4)
945
def _get_text_store(self, transport, control_files):
946
"""See RepositoryFormat._get_text_store()."""
949
class RepositoryFormat5(PreSplitOutRepositoryFormat):
950
"""Bzr control format 5.
952
This repository format has:
953
- weaves for file texts and inventory
955
- TextStores for revisions and signatures.
959
super(RepositoryFormat5, self).__init__()
960
self._matchingbzrdir = bzrlib.bzrdir.BzrDirFormat5()
962
def _get_revision_store(self, repo_transport, control_files):
963
"""See RepositoryFormat._get_revision_store()."""
964
"""Return the revision store object for this a_bzrdir."""
965
return self._get_text_rev_store(repo_transport,
970
def _get_text_store(self, transport, control_files):
971
"""See RepositoryFormat._get_text_store()."""
972
return self._get_versioned_file_store('weaves', transport, control_files, prefixed=False)
975
class RepositoryFormat6(PreSplitOutRepositoryFormat):
976
"""Bzr control format 6.
978
This repository format has:
979
- weaves for file texts and inventory
980
- hash subdirectory based stores.
981
- TextStores for revisions and signatures.
985
super(RepositoryFormat6, self).__init__()
986
self._matchingbzrdir = bzrlib.bzrdir.BzrDirFormat6()
988
def _get_revision_store(self, repo_transport, control_files):
989
"""See RepositoryFormat._get_revision_store()."""
990
return self._get_text_rev_store(repo_transport,
996
def _get_text_store(self, transport, control_files):
997
"""See RepositoryFormat._get_text_store()."""
998
return self._get_versioned_file_store('weaves', transport, control_files)
1001
class MetaDirRepositoryFormat(RepositoryFormat):
1002
"""Common base class for the new repositories using the metadir layour."""
1005
super(MetaDirRepositoryFormat, self).__init__()
1006
self._matchingbzrdir = bzrlib.bzrdir.BzrDirMetaFormat1()
1008
def _create_control_files(self, a_bzrdir):
1009
"""Create the required files and the initial control_files object."""
1010
# FIXME: RBC 20060125 dont peek under the covers
1011
# NB: no need to escape relative paths that are url safe.
1012
repository_transport = a_bzrdir.get_repository_transport(self)
1013
control_files = LockableFiles(repository_transport, 'lock', LockDir)
1014
control_files.create_lock()
1015
return control_files
1017
def _upload_blank_content(self, a_bzrdir, dirs, files, utf8_files, shared):
1018
"""Upload the initial blank content."""
1019
control_files = self._create_control_files(a_bzrdir)
1020
control_files.lock_write()
1022
control_files._transport.mkdir_multi(dirs,
1023
mode=control_files._dir_mode)
1024
for file, content in files:
1025
control_files.put(file, content)
1026
for file, content in utf8_files:
1027
control_files.put_utf8(file, content)
1029
control_files.put_utf8('shared-storage', '')
1031
control_files.unlock()
1034
class RepositoryFormat7(MetaDirRepositoryFormat):
1035
"""Bzr repository 7.
1037
This repository format has:
1038
- weaves for file texts and inventory
1039
- hash subdirectory based stores.
1040
- TextStores for revisions and signatures.
1041
- a format marker of its own
1042
- an optional 'shared-storage' flag
1043
- an optional 'no-working-trees' flag
1046
def _get_control_store(self, repo_transport, control_files):
1047
"""Return the control store for this repository."""
1048
return self._get_versioned_file_store('',
1053
def get_format_string(self):
1054
"""See RepositoryFormat.get_format_string()."""
1055
return "Bazaar-NG Repository format 7"
1057
def _get_revision_store(self, repo_transport, control_files):
1058
"""See RepositoryFormat._get_revision_store()."""
1059
return self._get_text_rev_store(repo_transport,
1066
def _get_text_store(self, transport, control_files):
1067
"""See RepositoryFormat._get_text_store()."""
1068
return self._get_versioned_file_store('weaves',
1072
def initialize(self, a_bzrdir, shared=False):
1073
"""Create a weave repository.
1075
:param shared: If true the repository will be initialized as a shared
1078
from bzrlib.weavefile import write_weave_v5
1079
from bzrlib.weave import Weave
1081
# Create an empty weave
1083
bzrlib.weavefile.write_weave_v5(Weave(), sio)
1084
empty_weave = sio.getvalue()
1086
mutter('creating repository in %s.', a_bzrdir.transport.base)
1087
dirs = ['revision-store', 'weaves']
1088
files = [('inventory.weave', StringIO(empty_weave)),
1090
utf8_files = [('format', self.get_format_string())]
1092
self._upload_blank_content(a_bzrdir, dirs, files, utf8_files, shared)
1093
return self.open(a_bzrdir=a_bzrdir, _found=True)
1095
def open(self, a_bzrdir, _found=False, _override_transport=None):
1096
"""See RepositoryFormat.open().
1098
:param _override_transport: INTERNAL USE ONLY. Allows opening the
1099
repository at a slightly different url
1100
than normal. I.e. during 'upgrade'.
1103
format = RepositoryFormat.find_format(a_bzrdir)
1104
assert format.__class__ == self.__class__
1105
if _override_transport is not None:
1106
repo_transport = _override_transport
1108
repo_transport = a_bzrdir.get_repository_transport(None)
1109
control_files = LockableFiles(repo_transport, 'lock', LockDir)
1110
text_store = self._get_text_store(repo_transport, control_files)
1111
control_store = self._get_control_store(repo_transport, control_files)
1112
_revision_store = self._get_revision_store(repo_transport, control_files)
1113
return MetaDirRepository(_format=self,
1115
control_files=control_files,
1116
_revision_store=_revision_store,
1117
control_store=control_store,
1118
text_store=text_store)
1121
class RepositoryFormatKnit1(MetaDirRepositoryFormat):
1122
"""Bzr repository knit format 1.
1124
This repository format has:
1125
- knits for file texts and inventory
1126
- hash subdirectory based stores.
1127
- knits for revisions and signatures
1128
- TextStores for revisions and signatures.
1129
- a format marker of its own
1130
- an optional 'shared-storage' flag
1131
- an optional 'no-working-trees' flag
1135
def _get_control_store(self, repo_transport, control_files):
1136
"""Return the control store for this repository."""
1137
return self._get_versioned_file_store('',
1141
versionedfile_class=KnitVersionedFile)
1143
def get_format_string(self):
1144
"""See RepositoryFormat.get_format_string()."""
1145
return "Bazaar-NG Knit Repository Format 1"
1147
def _get_revision_store(self, repo_transport, control_files):
1148
"""See RepositoryFormat._get_revision_store()."""
1149
from bzrlib.store.revision.knit import KnitRevisionStore
1150
versioned_file_store = VersionedFileStore(
1152
file_mode = control_files._file_mode,
1155
versionedfile_class=KnitVersionedFile)
1156
return KnitRevisionStore(versioned_file_store)
1158
def _get_text_store(self, transport, control_files):
1159
"""See RepositoryFormat._get_text_store()."""
1160
return self._get_versioned_file_store('knits',
1163
versionedfile_class=KnitVersionedFile)
1165
def initialize(self, a_bzrdir, shared=False):
1166
"""Create a knit format 1 repository.
1168
:param shared: If true the repository will be initialized as a shared
1170
XXX NOTE that this current uses a Weave for testing and will become
1171
A Knit in due course.
1173
from bzrlib.weavefile import write_weave_v5
1174
from bzrlib.weave import Weave
1176
# Create an empty weave
1178
bzrlib.weavefile.write_weave_v5(Weave(), sio)
1179
empty_weave = sio.getvalue()
1181
mutter('creating repository in %s.', a_bzrdir.transport.base)
1182
dirs = ['revision-store', 'knits', 'control']
1183
files = [('control/inventory.weave', StringIO(empty_weave)),
1185
utf8_files = [('format', self.get_format_string())]
1187
self._upload_blank_content(a_bzrdir, dirs, files, utf8_files, shared)
1188
repo_transport = a_bzrdir.get_repository_transport(None)
1189
control_files = LockableFiles(repo_transport, 'lock', LockDir)
1190
control_store = self._get_control_store(repo_transport, control_files)
1191
transaction = bzrlib.transactions.PassThroughTransaction()
1192
# trigger a write of the inventory store.
1193
control_store.get_weave_or_empty('inventory', transaction)
1194
_revision_store = self._get_revision_store(repo_transport, control_files)
1195
_revision_store.has_revision_id('A', transaction)
1196
_revision_store.get_signature_file(transaction)
1197
return self.open(a_bzrdir=a_bzrdir, _found=True)
1199
def open(self, a_bzrdir, _found=False, _override_transport=None):
1200
"""See RepositoryFormat.open().
1202
:param _override_transport: INTERNAL USE ONLY. Allows opening the
1203
repository at a slightly different url
1204
than normal. I.e. during 'upgrade'.
1207
format = RepositoryFormat.find_format(a_bzrdir)
1208
assert format.__class__ == self.__class__
1209
if _override_transport is not None:
1210
repo_transport = _override_transport
1212
repo_transport = a_bzrdir.get_repository_transport(None)
1213
control_files = LockableFiles(repo_transport, 'lock', LockDir)
1214
text_store = self._get_text_store(repo_transport, control_files)
1215
control_store = self._get_control_store(repo_transport, control_files)
1216
_revision_store = self._get_revision_store(repo_transport, control_files)
1217
return KnitRepository(_format=self,
1219
control_files=control_files,
1220
_revision_store=_revision_store,
1221
control_store=control_store,
1222
text_store=text_store)
1225
# formats which have no format string are not discoverable
1226
# and not independently creatable, so are not registered.
1227
_default_format = RepositoryFormat7()
1228
RepositoryFormat.register_format(_default_format)
1229
RepositoryFormat.register_format(RepositoryFormatKnit1())
1230
RepositoryFormat.set_default_format(_default_format)
1231
_legacy_formats = [RepositoryFormat4(),
1232
RepositoryFormat5(),
1233
RepositoryFormat6()]
1236
class InterRepository(InterObject):
1237
"""This class represents operations taking place between two repositories.
1239
Its instances have methods like copy_content and fetch, and contain
1240
references to the source and target repositories these operations can be
1243
Often we will provide convenience methods on 'repository' which carry out
1244
operations with another repository - they will always forward to
1245
InterRepository.get(other).method_name(parameters).
1249
"""The available optimised InterRepository types."""
1252
def copy_content(self, revision_id=None, basis=None):
1253
"""Make a complete copy of the content in self into destination.
1255
This is a destructive operation! Do not use it on existing
1258
:param revision_id: Only copy the content needed to construct
1259
revision_id and its parents.
1260
:param basis: Copy the needed data preferentially from basis.
1263
self.target.set_make_working_trees(self.source.make_working_trees())
1264
except NotImplementedError:
1266
# grab the basis available data
1267
if basis is not None:
1268
self.target.fetch(basis, revision_id=revision_id)
1269
# but dont bother fetching if we have the needed data now.
1270
if (revision_id not in (None, NULL_REVISION) and
1271
self.target.has_revision(revision_id)):
1273
self.target.fetch(self.source, revision_id=revision_id)
1275
def _double_lock(self, lock_source, lock_target):
1276
"""Take out too locks, rolling back the first if the second throws."""
1281
# we want to ensure that we don't leave source locked by mistake.
1282
# and any error on target should not confuse source.
1283
self.source.unlock()
1287
def fetch(self, revision_id=None, pb=None):
1288
"""Fetch the content required to construct revision_id.
1290
The content is copied from source to target.
1292
:param revision_id: if None all content is copied, if NULL_REVISION no
1294
:param pb: optional progress bar to use for progress reports. If not
1295
provided a default one will be created.
1297
Returns the copied revision count and the failed revisions in a tuple:
1300
from bzrlib.fetch import GenericRepoFetcher
1301
mutter("Using fetch logic to copy between %s(%s) and %s(%s)",
1302
self.source, self.source._format, self.target, self.target._format)
1303
f = GenericRepoFetcher(to_repository=self.target,
1304
from_repository=self.source,
1305
last_revision=revision_id,
1307
return f.count_copied, f.failed_revisions
1309
def lock_read(self):
1310
"""Take out a logical read lock.
1312
This will lock the source branch and the target branch. The source gets
1313
a read lock and the target a read lock.
1315
self._double_lock(self.source.lock_read, self.target.lock_read)
1317
def lock_write(self):
1318
"""Take out a logical write lock.
1320
This will lock the source branch and the target branch. The source gets
1321
a read lock and the target a write lock.
1323
self._double_lock(self.source.lock_read, self.target.lock_write)
1326
def missing_revision_ids(self, revision_id=None):
1327
"""Return the revision ids that source has that target does not.
1329
These are returned in topological order.
1331
:param revision_id: only return revision ids included by this
1334
# generic, possibly worst case, slow code path.
1335
target_ids = set(self.target.all_revision_ids())
1336
if revision_id is not None:
1337
source_ids = self.source.get_ancestry(revision_id)
1338
assert source_ids.pop(0) == None
1340
source_ids = self.source.all_revision_ids()
1341
result_set = set(source_ids).difference(target_ids)
1342
# this may look like a no-op: its not. It preserves the ordering
1343
# other_ids had while only returning the members from other_ids
1344
# that we've decided we need.
1345
return [rev_id for rev_id in source_ids if rev_id in result_set]
1348
"""Release the locks on source and target."""
1350
self.target.unlock()
1352
self.source.unlock()
1355
class InterWeaveRepo(InterRepository):
1356
"""Optimised code paths between Weave based repositories."""
1358
_matching_repo_format = _default_format
1359
"""Repository format for testing with."""
1362
def is_compatible(source, target):
1363
"""Be compatible with known Weave formats.
1365
We dont test for the stores being of specific types becase that
1366
could lead to confusing results, and there is no need to be
1370
return (isinstance(source._format, (RepositoryFormat5,
1372
RepositoryFormat7)) and
1373
isinstance(target._format, (RepositoryFormat5,
1375
RepositoryFormat7)))
1376
except AttributeError:
1380
def copy_content(self, revision_id=None, basis=None):
1381
"""See InterRepository.copy_content()."""
1382
# weave specific optimised path:
1383
if basis is not None:
1384
# copy the basis in, then fetch remaining data.
1385
basis.copy_content_into(self.target, revision_id)
1386
# the basis copy_content_into could misset this.
1388
self.target.set_make_working_trees(self.source.make_working_trees())
1389
except NotImplementedError:
1391
self.target.fetch(self.source, revision_id=revision_id)
1394
self.target.set_make_working_trees(self.source.make_working_trees())
1395
except NotImplementedError:
1397
# FIXME do not peek!
1398
if self.source.control_files._transport.listable():
1399
pb = bzrlib.ui.ui_factory.nested_progress_bar()
1401
self.target.weave_store.copy_all_ids(
1402
self.source.weave_store,
1404
from_transaction=self.source.get_transaction(),
1405
to_transaction=self.target.get_transaction())
1406
pb.update('copying inventory', 0, 1)
1407
self.target.control_weaves.copy_multi(
1408
self.source.control_weaves, ['inventory'],
1409
from_transaction=self.source.get_transaction(),
1410
to_transaction=self.target.get_transaction())
1411
self.target._revision_store.text_store.copy_all_ids(
1412
self.source._revision_store.text_store,
1417
self.target.fetch(self.source, revision_id=revision_id)
1420
def fetch(self, revision_id=None, pb=None):
1421
"""See InterRepository.fetch()."""
1422
from bzrlib.fetch import GenericRepoFetcher
1423
mutter("Using fetch logic to copy between %s(%s) and %s(%s)",
1424
self.source, self.source._format, self.target, self.target._format)
1425
f = GenericRepoFetcher(to_repository=self.target,
1426
from_repository=self.source,
1427
last_revision=revision_id,
1429
return f.count_copied, f.failed_revisions
1432
def missing_revision_ids(self, revision_id=None):
1433
"""See InterRepository.missing_revision_ids()."""
1434
# we want all revisions to satisfy revision_id in source.
1435
# but we dont want to stat every file here and there.
1436
# we want then, all revisions other needs to satisfy revision_id
1437
# checked, but not those that we have locally.
1438
# so the first thing is to get a subset of the revisions to
1439
# satisfy revision_id in source, and then eliminate those that
1440
# we do already have.
1441
# this is slow on high latency connection to self, but as as this
1442
# disk format scales terribly for push anyway due to rewriting
1443
# inventory.weave, this is considered acceptable.
1445
if revision_id is not None:
1446
source_ids = self.source.get_ancestry(revision_id)
1447
assert source_ids.pop(0) == None
1449
source_ids = self.source._all_possible_ids()
1450
source_ids_set = set(source_ids)
1451
# source_ids is the worst possible case we may need to pull.
1452
# now we want to filter source_ids against what we actually
1453
# have in target, but dont try to check for existence where we know
1454
# we do not have a revision as that would be pointless.
1455
target_ids = set(self.target._all_possible_ids())
1456
possibly_present_revisions = target_ids.intersection(source_ids_set)
1457
actually_present_revisions = set(self.target._eliminate_revisions_not_present(possibly_present_revisions))
1458
required_revisions = source_ids_set.difference(actually_present_revisions)
1459
required_topo_revisions = [rev_id for rev_id in source_ids if rev_id in required_revisions]
1460
if revision_id is not None:
1461
# we used get_ancestry to determine source_ids then we are assured all
1462
# revisions referenced are present as they are installed in topological order.
1463
# and the tip revision was validated by get_ancestry.
1464
return required_topo_revisions
1466
# if we just grabbed the possibly available ids, then
1467
# we only have an estimate of whats available and need to validate
1468
# that against the revision records.
1469
return self.source._eliminate_revisions_not_present(required_topo_revisions)
1472
class InterKnitRepo(InterRepository):
1473
"""Optimised code paths between Knit based repositories."""
1475
_matching_repo_format = RepositoryFormatKnit1()
1476
"""Repository format for testing with."""
1479
def is_compatible(source, target):
1480
"""Be compatible with known Knit formats.
1482
We dont test for the stores being of specific types becase that
1483
could lead to confusing results, and there is no need to be
1487
return (isinstance(source._format, (RepositoryFormatKnit1)) and
1488
isinstance(target._format, (RepositoryFormatKnit1)))
1489
except AttributeError:
1493
def fetch(self, revision_id=None, pb=None):
1494
"""See InterRepository.fetch()."""
1495
from bzrlib.fetch import KnitRepoFetcher
1496
mutter("Using fetch logic to copy between %s(%s) and %s(%s)",
1497
self.source, self.source._format, self.target, self.target._format)
1498
f = KnitRepoFetcher(to_repository=self.target,
1499
from_repository=self.source,
1500
last_revision=revision_id,
1502
return f.count_copied, f.failed_revisions
1505
def missing_revision_ids(self, revision_id=None):
1506
"""See InterRepository.missing_revision_ids()."""
1507
if revision_id is not None:
1508
source_ids = self.source.get_ancestry(revision_id)
1509
assert source_ids.pop(0) == None
1511
source_ids = self.source._all_possible_ids()
1512
source_ids_set = set(source_ids)
1513
# source_ids is the worst possible case we may need to pull.
1514
# now we want to filter source_ids against what we actually
1515
# have in target, but dont try to check for existence where we know
1516
# we do not have a revision as that would be pointless.
1517
target_ids = set(self.target._all_possible_ids())
1518
possibly_present_revisions = target_ids.intersection(source_ids_set)
1519
actually_present_revisions = set(self.target._eliminate_revisions_not_present(possibly_present_revisions))
1520
required_revisions = source_ids_set.difference(actually_present_revisions)
1521
required_topo_revisions = [rev_id for rev_id in source_ids if rev_id in required_revisions]
1522
if revision_id is not None:
1523
# we used get_ancestry to determine source_ids then we are assured all
1524
# revisions referenced are present as they are installed in topological order.
1525
# and the tip revision was validated by get_ancestry.
1526
return required_topo_revisions
1528
# if we just grabbed the possibly available ids, then
1529
# we only have an estimate of whats available and need to validate
1530
# that against the revision records.
1531
return self.source._eliminate_revisions_not_present(required_topo_revisions)
1533
InterRepository.register_optimiser(InterWeaveRepo)
1534
InterRepository.register_optimiser(InterKnitRepo)
1537
class RepositoryTestProviderAdapter(object):
1538
"""A tool to generate a suite testing multiple repository formats at once.
1540
This is done by copying the test once for each transport and injecting
1541
the transport_server, transport_readonly_server, and bzrdir_format and
1542
repository_format classes into each copy. Each copy is also given a new id()
1543
to make it easy to identify.
1546
def __init__(self, transport_server, transport_readonly_server, formats):
1547
self._transport_server = transport_server
1548
self._transport_readonly_server = transport_readonly_server
1549
self._formats = formats
1551
def adapt(self, test):
1552
result = TestSuite()
1553
for repository_format, bzrdir_format in self._formats:
1554
new_test = deepcopy(test)
1555
new_test.transport_server = self._transport_server
1556
new_test.transport_readonly_server = self._transport_readonly_server
1557
new_test.bzrdir_format = bzrdir_format
1558
new_test.repository_format = repository_format
1559
def make_new_test_id():
1560
new_id = "%s(%s)" % (new_test.id(), repository_format.__class__.__name__)
1561
return lambda: new_id
1562
new_test.id = make_new_test_id()
1563
result.addTest(new_test)
1567
class InterRepositoryTestProviderAdapter(object):
1568
"""A tool to generate a suite testing multiple inter repository formats.
1570
This is done by copying the test once for each interrepo provider and injecting
1571
the transport_server, transport_readonly_server, repository_format and
1572
repository_to_format classes into each copy.
1573
Each copy is also given a new id() to make it easy to identify.
1576
def __init__(self, transport_server, transport_readonly_server, formats):
1577
self._transport_server = transport_server
1578
self._transport_readonly_server = transport_readonly_server
1579
self._formats = formats
1581
def adapt(self, test):
1582
result = TestSuite()
1583
for interrepo_class, repository_format, repository_format_to in self._formats:
1584
new_test = deepcopy(test)
1585
new_test.transport_server = self._transport_server
1586
new_test.transport_readonly_server = self._transport_readonly_server
1587
new_test.interrepo_class = interrepo_class
1588
new_test.repository_format = repository_format
1589
new_test.repository_format_to = repository_format_to
1590
def make_new_test_id():
1591
new_id = "%s(%s)" % (new_test.id(), interrepo_class.__name__)
1592
return lambda: new_id
1593
new_test.id = make_new_test_id()
1594
result.addTest(new_test)
1598
def default_test_list():
1599
"""Generate the default list of interrepo permutations to test."""
1601
# test the default InterRepository between format 6 and the current
1603
# XXX: robertc 20060220 reinstate this when there are two supported
1604
# formats which do not have an optimal code path between them.
1605
result.append((InterRepository,
1606
RepositoryFormat6(),
1607
RepositoryFormatKnit1()))
1608
for optimiser in InterRepository._optimisers:
1609
result.append((optimiser,
1610
optimiser._matching_repo_format,
1611
optimiser._matching_repo_format
1613
# if there are specific combinations we want to use, we can add them
1618
class CopyConverter(object):
1619
"""A repository conversion tool which just performs a copy of the content.
1621
This is slow but quite reliable.
1624
def __init__(self, target_format):
1625
"""Create a CopyConverter.
1627
:param target_format: The format the resulting repository should be.
1629
self.target_format = target_format
1631
def convert(self, repo, pb):
1632
"""Perform the conversion of to_convert, giving feedback via pb.
1634
:param to_convert: The disk object to convert.
1635
:param pb: a progress bar to use for progress information.
1640
# this is only useful with metadir layouts - separated repo content.
1641
# trigger an assertion if not such
1642
repo._format.get_format_string()
1643
self.repo_dir = repo.bzrdir
1644
self.step('Moving repository to repository.backup')
1645
self.repo_dir.transport.move('repository', 'repository.backup')
1646
backup_transport = self.repo_dir.transport.clone('repository.backup')
1647
self.source_repo = repo._format.open(self.repo_dir,
1649
_override_transport=backup_transport)
1650
self.step('Creating new repository')
1651
converted = self.target_format.initialize(self.repo_dir,
1652
self.source_repo.is_shared())
1653
converted.lock_write()
1655
self.step('Copying content into repository.')
1656
self.source_repo.copy_content_into(converted)
1659
self.step('Deleting old repository content.')
1660
self.repo_dir.transport.delete_tree('repository.backup')
1661
self.pb.note('repository converted')
1663
def step(self, message):
1664
"""Update the pb by a step."""
1666
self.pb.update(message, self.count, self.total)