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# Copyright (C) 2005, 2006, 2007, 2008, 2009 Canonical Ltd
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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from cStringIO import StringIO
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from bzrlib.lazy_import import lazy_import
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lazy_import(globals(), """
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from itertools import chain
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config as _mod_config,
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revision as _mod_revision,
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from bzrlib.config import BranchConfig, TransportConfig
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from bzrlib.repofmt.pack_repo import RepositoryFormatKnitPack5RichRoot
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from bzrlib.tag import (
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from bzrlib.decorators import needs_read_lock, needs_write_lock
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from bzrlib.hooks import HookPoint, Hooks
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from bzrlib.inter import InterObject
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from bzrlib import registry
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from bzrlib.symbol_versioning import (
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from bzrlib.trace import mutter, mutter_callsite, note, is_quiet
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BZR_BRANCH_FORMAT_4 = "Bazaar-NG branch, format 0.0.4\n"
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BZR_BRANCH_FORMAT_5 = "Bazaar-NG branch, format 5\n"
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BZR_BRANCH_FORMAT_6 = "Bazaar Branch Format 6 (bzr 0.15)\n"
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# TODO: Maybe include checks for common corruption of newlines, etc?
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# TODO: Some operations like log might retrieve the same revisions
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# repeatedly to calculate deltas. We could perhaps have a weakref
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# cache in memory to make this faster. In general anything can be
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# cached in memory between lock and unlock operations. .. nb thats
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# what the transaction identity map provides
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######################################################################
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"""Branch holding a history of revisions.
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Base directory/url of the branch.
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hooks: An instance of BranchHooks.
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# this is really an instance variable - FIXME move it there
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def __init__(self, *ignored, **ignored_too):
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self.tags = self._format.make_tags(self)
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self._revision_history_cache = None
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self._revision_id_to_revno_cache = None
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self._partial_revision_id_to_revno_cache = {}
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self._partial_revision_history_cache = []
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self._last_revision_info_cache = None
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self._merge_sorted_revisions_cache = None
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hooks = Branch.hooks['open']
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def _open_hook(self):
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"""Called by init to allow simpler extension of the base class."""
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def _activate_fallback_location(self, url):
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"""Activate the branch/repository from url as a fallback repository."""
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repo = self._get_fallback_repository(url)
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if repo.has_same_location(self.repository):
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raise errors.UnstackableLocationError(self.base, url)
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self.repository.add_fallback_repository(repo)
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def break_lock(self):
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"""Break a lock if one is present from another instance.
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Uses the ui factory to ask for confirmation if the lock may be from
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This will probe the repository for its lock as well.
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self.control_files.break_lock()
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self.repository.break_lock()
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master = self.get_master_branch()
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if master is not None:
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def _check_stackable_repo(self):
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if not self.repository._format.supports_external_lookups:
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raise errors.UnstackableRepositoryFormat(self.repository._format,
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self.repository.base)
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def _extend_partial_history(self, stop_index=None, stop_revision=None):
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"""Extend the partial history to include a given index
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If a stop_index is supplied, stop when that index has been reached.
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If a stop_revision is supplied, stop when that revision is
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encountered. Otherwise, stop when the beginning of history is
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:param stop_index: The index which should be present. When it is
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present, history extension will stop.
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:param stop_revision: The revision id which should be present. When
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it is encountered, history extension will stop.
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if len(self._partial_revision_history_cache) == 0:
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self._partial_revision_history_cache = [self.last_revision()]
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repository._iter_for_revno(
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self.repository, self._partial_revision_history_cache,
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stop_index=stop_index, stop_revision=stop_revision)
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if self._partial_revision_history_cache[-1] == _mod_revision.NULL_REVISION:
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self._partial_revision_history_cache.pop()
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def _get_check_refs(self):
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"""Get the references needed for check().
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revid = self.last_revision()
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return [('revision-existence', revid), ('lefthand-distance', revid)]
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def open(base, _unsupported=False, possible_transports=None):
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"""Open the branch rooted at base.
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For instance, if the branch is at URL/.bzr/branch,
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Branch.open(URL) -> a Branch instance.
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control = bzrdir.BzrDir.open(base, _unsupported,
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possible_transports=possible_transports)
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return control.open_branch(_unsupported)
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def open_from_transport(transport, _unsupported=False):
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"""Open the branch rooted at transport"""
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control = bzrdir.BzrDir.open_from_transport(transport, _unsupported)
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return control.open_branch(_unsupported)
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def open_containing(url, possible_transports=None):
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"""Open an existing branch which contains url.
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This probes for a branch at url, and searches upwards from there.
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Basically we keep looking up until we find the control directory or
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run into the root. If there isn't one, raises NotBranchError.
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If there is one and it is either an unrecognised format or an unsupported
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format, UnknownFormatError or UnsupportedFormatError are raised.
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If there is one, it is returned, along with the unused portion of url.
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control, relpath = bzrdir.BzrDir.open_containing(url,
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return control.open_branch(), relpath
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def _push_should_merge_tags(self):
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"""Should _basic_push merge this branch's tags into the target?
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The default implementation returns False if this branch has no tags,
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and True the rest of the time. Subclasses may override this.
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return self.supports_tags() and self.tags.get_tag_dict()
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def get_config(self):
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return BranchConfig(self)
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def _get_config(self):
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"""Get the concrete config for just the config in this branch.
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This is not intended for client use; see Branch.get_config for the
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:return: An object supporting get_option and set_option.
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raise NotImplementedError(self._get_config)
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def _get_fallback_repository(self, url):
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"""Get the repository we fallback to at url."""
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url = urlutils.join(self.base, url)
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a_bzrdir = bzrdir.BzrDir.open(url,
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possible_transports=[self.bzrdir.root_transport])
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return a_bzrdir.open_branch().repository
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def _get_tags_bytes(self):
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"""Get the bytes of a serialised tags dict.
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Note that not all branches support tags, nor do all use the same tags
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logic: this method is specific to BasicTags. Other tag implementations
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may use the same method name and behave differently, safely, because
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of the double-dispatch via
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format.make_tags->tags_instance->get_tags_dict.
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:return: The bytes of the tags file.
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:seealso: Branch._set_tags_bytes.
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return self._transport.get_bytes('tags')
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def _get_nick(self, local=False, possible_transports=None):
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config = self.get_config()
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# explicit overrides master, but don't look for master if local is True
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if not local and not config.has_explicit_nickname():
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master = self.get_master_branch(possible_transports)
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if master is not None:
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# return the master branch value
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except errors.BzrError, e:
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# Silently fall back to local implicit nick if the master is
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mutter("Could not connect to bound branch, "
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"falling back to local nick.\n " + str(e))
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return config.get_nickname()
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def _set_nick(self, nick):
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self.get_config().set_user_option('nickname', nick, warn_masked=True)
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nick = property(_get_nick, _set_nick)
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raise NotImplementedError(self.is_locked)
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def _lefthand_history(self, revision_id, last_rev=None,
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if 'evil' in debug.debug_flags:
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mutter_callsite(4, "_lefthand_history scales with history.")
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# stop_revision must be a descendant of last_revision
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graph = self.repository.get_graph()
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if last_rev is not None:
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if not graph.is_ancestor(last_rev, revision_id):
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# our previous tip is not merged into stop_revision
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raise errors.DivergedBranches(self, other_branch)
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# make a new revision history from the graph
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parents_map = graph.get_parent_map([revision_id])
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if revision_id not in parents_map:
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raise errors.NoSuchRevision(self, revision_id)
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current_rev_id = revision_id
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check_not_reserved_id = _mod_revision.check_not_reserved_id
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# Do not include ghosts or graph origin in revision_history
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while (current_rev_id in parents_map and
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len(parents_map[current_rev_id]) > 0):
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check_not_reserved_id(current_rev_id)
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new_history.append(current_rev_id)
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current_rev_id = parents_map[current_rev_id][0]
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parents_map = graph.get_parent_map([current_rev_id])
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new_history.reverse()
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def lock_write(self):
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raise NotImplementedError(self.lock_write)
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raise NotImplementedError(self.lock_read)
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raise NotImplementedError(self.unlock)
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def peek_lock_mode(self):
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"""Return lock mode for the Branch: 'r', 'w' or None"""
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raise NotImplementedError(self.peek_lock_mode)
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def get_physical_lock_status(self):
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raise NotImplementedError(self.get_physical_lock_status)
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def dotted_revno_to_revision_id(self, revno, _cache_reverse=False):
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"""Return the revision_id for a dotted revno.
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:param revno: a tuple like (1,) or (1,1,2)
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:param _cache_reverse: a private parameter enabling storage
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of the reverse mapping in a top level cache. (This should
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only be done in selective circumstances as we want to
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avoid having the mapping cached multiple times.)
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:return: the revision_id
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:raises errors.NoSuchRevision: if the revno doesn't exist
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rev_id = self._do_dotted_revno_to_revision_id(revno)
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self._partial_revision_id_to_revno_cache[rev_id] = revno
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def _do_dotted_revno_to_revision_id(self, revno):
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"""Worker function for dotted_revno_to_revision_id.
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Subclasses should override this if they wish to
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provide a more efficient implementation.
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return self.get_rev_id(revno[0])
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revision_id_to_revno = self.get_revision_id_to_revno_map()
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revision_ids = [revision_id for revision_id, this_revno
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in revision_id_to_revno.iteritems()
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if revno == this_revno]
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if len(revision_ids) == 1:
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return revision_ids[0]
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revno_str = '.'.join(map(str, revno))
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raise errors.NoSuchRevision(self, revno_str)
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def revision_id_to_dotted_revno(self, revision_id):
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"""Given a revision id, return its dotted revno.
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:return: a tuple like (1,) or (400,1,3).
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return self._do_revision_id_to_dotted_revno(revision_id)
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def _do_revision_id_to_dotted_revno(self, revision_id):
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"""Worker function for revision_id_to_revno."""
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# Try the caches if they are loaded
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result = self._partial_revision_id_to_revno_cache.get(revision_id)
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if result is not None:
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if self._revision_id_to_revno_cache:
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result = self._revision_id_to_revno_cache.get(revision_id)
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raise errors.NoSuchRevision(self, revision_id)
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# Try the mainline as it's optimised
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revno = self.revision_id_to_revno(revision_id)
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except errors.NoSuchRevision:
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# We need to load and use the full revno map after all
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result = self.get_revision_id_to_revno_map().get(revision_id)
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raise errors.NoSuchRevision(self, revision_id)
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def get_revision_id_to_revno_map(self):
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"""Return the revision_id => dotted revno map.
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This will be regenerated on demand, but will be cached.
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:return: A dictionary mapping revision_id => dotted revno.
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This dictionary should not be modified by the caller.
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if self._revision_id_to_revno_cache is not None:
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mapping = self._revision_id_to_revno_cache
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mapping = self._gen_revno_map()
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self._cache_revision_id_to_revno(mapping)
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# TODO: jam 20070417 Since this is being cached, should we be returning
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# I would rather not, and instead just declare that users should not
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# modify the return value.
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def _gen_revno_map(self):
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"""Create a new mapping from revision ids to dotted revnos.
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Dotted revnos are generated based on the current tip in the revision
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This is the worker function for get_revision_id_to_revno_map, which
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just caches the return value.
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:return: A dictionary mapping revision_id => dotted revno.
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revision_id_to_revno = dict((rev_id, revno)
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for rev_id, depth, revno, end_of_merge
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in self.iter_merge_sorted_revisions())
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return revision_id_to_revno
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def iter_merge_sorted_revisions(self, start_revision_id=None,
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stop_revision_id=None, stop_rule='exclude', direction='reverse'):
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"""Walk the revisions for a branch in merge sorted order.
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Merge sorted order is the output from a merge-aware,
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topological sort, i.e. all parents come before their
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children going forward; the opposite for reverse.
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:param start_revision_id: the revision_id to begin walking from.
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If None, the branch tip is used.
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:param stop_revision_id: the revision_id to terminate the walk
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after. If None, the rest of history is included.
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:param stop_rule: if stop_revision_id is not None, the precise rule
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to use for termination:
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* 'exclude' - leave the stop revision out of the result (default)
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* 'include' - the stop revision is the last item in the result
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* 'with-merges' - include the stop revision and all of its
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merged revisions in the result
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:param direction: either 'reverse' or 'forward':
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* reverse means return the start_revision_id first, i.e.
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start at the most recent revision and go backwards in history
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* forward returns tuples in the opposite order to reverse.
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Note in particular that forward does *not* do any intelligent
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ordering w.r.t. depth as some clients of this API may like.
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(If required, that ought to be done at higher layers.)
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:return: an iterator over (revision_id, depth, revno, end_of_merge)
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* revision_id: the unique id of the revision
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* depth: How many levels of merging deep this node has been
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* revno_sequence: This field provides a sequence of
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revision numbers for all revisions. The format is:
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(REVNO, BRANCHNUM, BRANCHREVNO). BRANCHNUM is the number of the
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branch that the revno is on. From left to right the REVNO numbers
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are the sequence numbers within that branch of the revision.
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* end_of_merge: When True the next node (earlier in history) is
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part of a different merge.
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# Note: depth and revno values are in the context of the branch so
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# we need the full graph to get stable numbers, regardless of the
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if self._merge_sorted_revisions_cache is None:
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last_revision = self.last_revision()
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last_key = (last_revision,)
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known_graph = self.repository.revisions.get_known_graph_ancestry(
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self._merge_sorted_revisions_cache = known_graph.merge_sort(
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filtered = self._filter_merge_sorted_revisions(
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self._merge_sorted_revisions_cache, start_revision_id,
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stop_revision_id, stop_rule)
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if direction == 'reverse':
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if direction == 'forward':
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return reversed(list(filtered))
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raise ValueError('invalid direction %r' % direction)
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def _filter_merge_sorted_revisions(self, merge_sorted_revisions,
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start_revision_id, stop_revision_id, stop_rule):
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"""Iterate over an inclusive range of sorted revisions."""
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rev_iter = iter(merge_sorted_revisions)
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if start_revision_id is not None:
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for node in rev_iter:
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rev_id = node.key[-1]
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if rev_id != start_revision_id:
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# The decision to include the start or not
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# depends on the stop_rule if a stop is provided
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# so pop this node back into the iterator
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rev_iter = chain(iter([node]), rev_iter)
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if stop_revision_id is None:
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for node in rev_iter:
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rev_id = node.key[-1]
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yield (rev_id, node.merge_depth, node.revno,
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elif stop_rule == 'exclude':
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for node in rev_iter:
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rev_id = node.key[-1]
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if rev_id == stop_revision_id:
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yield (rev_id, node.merge_depth, node.revno,
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elif stop_rule == 'include':
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for node in rev_iter:
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rev_id = node.key[-1]
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yield (rev_id, node.merge_depth, node.revno,
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if rev_id == stop_revision_id:
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elif stop_rule == 'with-merges':
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stop_rev = self.repository.get_revision(stop_revision_id)
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if stop_rev.parent_ids:
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left_parent = stop_rev.parent_ids[0]
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left_parent = _mod_revision.NULL_REVISION
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for node in rev_iter:
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rev_id = node.key[-1]
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if rev_id == left_parent:
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yield (rev_id, node.merge_depth, node.revno,
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raise ValueError('invalid stop_rule %r' % stop_rule)
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def leave_lock_in_place(self):
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"""Tell this branch object not to release the physical lock when this
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If lock_write doesn't return a token, then this method is not supported.
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self.control_files.leave_in_place()
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def dont_leave_lock_in_place(self):
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"""Tell this branch object to release the physical lock when this
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object is unlocked, even if it didn't originally acquire it.
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If lock_write doesn't return a token, then this method is not supported.
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self.control_files.dont_leave_in_place()
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def bind(self, other):
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"""Bind the local branch the other branch.
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:param other: The branch to bind to
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raise errors.UpgradeRequired(self.base)
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def set_append_revisions_only(self, enabled):
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if not self._format.supports_set_append_revisions_only():
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raise errors.UpgradeRequired(self.base)
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self.get_config().set_user_option('append_revisions_only', value,
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def set_reference_info(self, file_id, tree_path, branch_location):
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"""Set the branch location to use for a tree reference."""
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raise errors.UnsupportedOperation(self.set_reference_info, self)
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def get_reference_info(self, file_id):
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"""Get the tree_path and branch_location for a tree reference."""
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raise errors.UnsupportedOperation(self.get_reference_info, self)
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def fetch(self, from_branch, last_revision=None, pb=None):
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"""Copy revisions from from_branch into this branch.
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:param from_branch: Where to copy from.
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:param last_revision: What revision to stop at (None for at the end
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:param pb: An optional progress bar to use.
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if self.base == from_branch.base:
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symbol_versioning.warn(
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symbol_versioning.deprecated_in((1, 14, 0))
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% "pb parameter to fetch()")
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from_branch.lock_read()
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if last_revision is None:
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last_revision = from_branch.last_revision()
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last_revision = _mod_revision.ensure_null(last_revision)
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return self.repository.fetch(from_branch.repository,
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revision_id=last_revision,
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def get_bound_location(self):
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"""Return the URL of the branch we are bound to.
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Older format branches cannot bind, please be sure to use a metadir
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def get_old_bound_location(self):
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"""Return the URL of the branch we used to be bound to
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raise errors.UpgradeRequired(self.base)
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def get_commit_builder(self, parents, config=None, timestamp=None,
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timezone=None, committer=None, revprops=None,
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"""Obtain a CommitBuilder for this branch.
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:param parents: Revision ids of the parents of the new revision.
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:param config: Optional configuration to use.
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:param timestamp: Optional timestamp recorded for commit.
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:param timezone: Optional timezone for timestamp.
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:param committer: Optional committer to set for commit.
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:param revprops: Optional dictionary of revision properties.
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:param revision_id: Optional revision id.
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config = self.get_config()
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return self.repository.get_commit_builder(self, parents, config,
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timestamp, timezone, committer, revprops, revision_id)
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def get_master_branch(self, possible_transports=None):
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"""Return the branch we are bound to.
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:return: Either a Branch, or None
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def get_revision_delta(self, revno):
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"""Return the delta for one revision.
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The delta is relative to its mainline predecessor, or the
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empty tree for revision 1.
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rh = self.revision_history()
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if not (1 <= revno <= len(rh)):
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raise errors.InvalidRevisionNumber(revno)
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return self.repository.get_revision_delta(rh[revno-1])
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def get_stacked_on_url(self):
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"""Get the URL this branch is stacked against.
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:raises NotStacked: If the branch is not stacked.
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:raises UnstackableBranchFormat: If the branch does not support
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raise NotImplementedError(self.get_stacked_on_url)
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def print_file(self, file, revision_id):
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"""Print `file` to stdout."""
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raise NotImplementedError(self.print_file)
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def set_revision_history(self, rev_history):
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raise NotImplementedError(self.set_revision_history)
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def set_parent(self, url):
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"""See Branch.set_parent."""
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# TODO: Maybe delete old location files?
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# URLs should never be unicode, even on the local fs,
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# FIXUP this and get_parent in a future branch format bump:
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# read and rewrite the file. RBC 20060125
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if isinstance(url, unicode):
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url = url.encode('ascii')
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except UnicodeEncodeError:
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raise errors.InvalidURL(url,
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"Urls must be 7-bit ascii, "
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"use bzrlib.urlutils.escape")
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url = urlutils.relative_url(self.base, url)
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self._set_parent_location(url)
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def set_stacked_on_url(self, url):
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"""Set the URL this branch is stacked against.
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:raises UnstackableBranchFormat: If the branch does not support
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:raises UnstackableRepositoryFormat: If the repository does not support
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if not self._format.supports_stacking():
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raise errors.UnstackableBranchFormat(self._format, self.base)
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# XXX: Changing from one fallback repository to another does not check
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# that all the data you need is present in the new fallback.
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# Possibly it should.
682
self._check_stackable_repo()
685
old_url = self.get_stacked_on_url()
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except (errors.NotStacked, errors.UnstackableBranchFormat,
687
errors.UnstackableRepositoryFormat):
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self._activate_fallback_location(url)
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# write this out after the repository is stacked to avoid setting a
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# stacked config that doesn't work.
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self._set_config_location('stacked_on_location', url)
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"""Change a branch to be unstacked, copying data as needed.
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Don't call this directly, use set_stacked_on_url(None).
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pb = ui.ui_factory.nested_progress_bar()
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pb.update("Unstacking")
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# The basic approach here is to fetch the tip of the branch,
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# including all available ghosts, from the existing stacked
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# repository into a new repository object without the fallbacks.
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# XXX: See <https://launchpad.net/bugs/397286> - this may not be
709
# correct for CHKMap repostiories
710
old_repository = self.repository
711
if len(old_repository._fallback_repositories) != 1:
712
raise AssertionError("can't cope with fallback repositories "
713
"of %r" % (self.repository,))
714
# unlock it, including unlocking the fallback
715
old_repository.unlock()
716
old_repository.lock_read()
718
# Repositories don't offer an interface to remove fallback
719
# repositories today; take the conceptually simpler option and just
720
# reopen it. We reopen it starting from the URL so that we
721
# get a separate connection for RemoteRepositories and can
722
# stream from one of them to the other. This does mean doing
723
# separate SSH connection setup, but unstacking is not a
724
# common operation so it's tolerable.
725
new_bzrdir = bzrdir.BzrDir.open(self.bzrdir.root_transport.base)
726
new_repository = new_bzrdir.find_repository()
727
self.repository = new_repository
728
if self.repository._fallback_repositories:
729
raise AssertionError("didn't expect %r to have "
730
"fallback_repositories"
731
% (self.repository,))
732
# this is not paired with an unlock because it's just restoring
733
# the previous state; the lock's released when set_stacked_on_url
735
self.repository.lock_write()
736
# XXX: If you unstack a branch while it has a working tree
737
# with a pending merge, the pending-merged revisions will no
738
# longer be present. You can (probably) revert and remerge.
740
# XXX: This only fetches up to the tip of the repository; it
741
# doesn't bring across any tags. That's fairly consistent
742
# with how branch works, but perhaps not ideal.
743
self.repository.fetch(old_repository,
744
revision_id=self.last_revision(),
747
old_repository.unlock()
751
def _set_tags_bytes(self, bytes):
752
"""Mirror method for _get_tags_bytes.
754
:seealso: Branch._get_tags_bytes.
756
return _run_with_write_locked_target(self, self._transport.put_bytes,
759
def _cache_revision_history(self, rev_history):
760
"""Set the cached revision history to rev_history.
762
The revision_history method will use this cache to avoid regenerating
763
the revision history.
765
This API is semi-public; it only for use by subclasses, all other code
766
should consider it to be private.
768
self._revision_history_cache = rev_history
770
def _cache_revision_id_to_revno(self, revision_id_to_revno):
771
"""Set the cached revision_id => revno map to revision_id_to_revno.
773
This API is semi-public; it only for use by subclasses, all other code
774
should consider it to be private.
776
self._revision_id_to_revno_cache = revision_id_to_revno
778
def _clear_cached_state(self):
779
"""Clear any cached data on this branch, e.g. cached revision history.
781
This means the next call to revision_history will need to call
782
_gen_revision_history.
784
This API is semi-public; it only for use by subclasses, all other code
785
should consider it to be private.
787
self._revision_history_cache = None
788
self._revision_id_to_revno_cache = None
789
self._last_revision_info_cache = None
790
self._merge_sorted_revisions_cache = None
791
self._partial_revision_history_cache = []
792
self._partial_revision_id_to_revno_cache = {}
794
def _gen_revision_history(self):
795
"""Return sequence of revision hashes on to this branch.
797
Unlike revision_history, this method always regenerates or rereads the
798
revision history, i.e. it does not cache the result, so repeated calls
801
Concrete subclasses should override this instead of revision_history so
802
that subclasses do not need to deal with caching logic.
804
This API is semi-public; it only for use by subclasses, all other code
805
should consider it to be private.
807
raise NotImplementedError(self._gen_revision_history)
810
def revision_history(self):
811
"""Return sequence of revision ids on this branch.
813
This method will cache the revision history for as long as it is safe to
816
if 'evil' in debug.debug_flags:
817
mutter_callsite(3, "revision_history scales with history.")
818
if self._revision_history_cache is not None:
819
history = self._revision_history_cache
821
history = self._gen_revision_history()
822
self._cache_revision_history(history)
826
"""Return current revision number for this branch.
828
That is equivalent to the number of revisions committed to
831
return self.last_revision_info()[0]
834
"""Older format branches cannot bind or unbind."""
835
raise errors.UpgradeRequired(self.base)
837
def last_revision(self):
838
"""Return last revision id, or NULL_REVISION."""
839
return self.last_revision_info()[1]
842
def last_revision_info(self):
843
"""Return information about the last revision.
845
:return: A tuple (revno, revision_id).
847
if self._last_revision_info_cache is None:
848
self._last_revision_info_cache = self._last_revision_info()
849
return self._last_revision_info_cache
851
def _last_revision_info(self):
852
rh = self.revision_history()
855
return (revno, rh[-1])
857
return (0, _mod_revision.NULL_REVISION)
859
@deprecated_method(deprecated_in((1, 6, 0)))
860
def missing_revisions(self, other, stop_revision=None):
861
"""Return a list of new revisions that would perfectly fit.
863
If self and other have not diverged, return a list of the revisions
864
present in other, but missing from self.
866
self_history = self.revision_history()
867
self_len = len(self_history)
868
other_history = other.revision_history()
869
other_len = len(other_history)
870
common_index = min(self_len, other_len) -1
871
if common_index >= 0 and \
872
self_history[common_index] != other_history[common_index]:
873
raise errors.DivergedBranches(self, other)
875
if stop_revision is None:
876
stop_revision = other_len
878
if stop_revision > other_len:
879
raise errors.NoSuchRevision(self, stop_revision)
880
return other_history[self_len:stop_revision]
883
def update_revisions(self, other, stop_revision=None, overwrite=False,
885
"""Pull in new perfect-fit revisions.
887
:param other: Another Branch to pull from
888
:param stop_revision: Updated until the given revision
889
:param overwrite: Always set the branch pointer, rather than checking
890
to see if it is a proper descendant.
891
:param graph: A Graph object that can be used to query history
892
information. This can be None.
895
return InterBranch.get(other, self).update_revisions(stop_revision,
898
def import_last_revision_info(self, source_repo, revno, revid):
899
"""Set the last revision info, importing from another repo if necessary.
901
This is used by the bound branch code to upload a revision to
902
the master branch first before updating the tip of the local branch.
904
:param source_repo: Source repository to optionally fetch from
905
:param revno: Revision number of the new tip
906
:param revid: Revision id of the new tip
908
if not self.repository.has_same_location(source_repo):
909
self.repository.fetch(source_repo, revision_id=revid)
910
self.set_last_revision_info(revno, revid)
912
def revision_id_to_revno(self, revision_id):
913
"""Given a revision id, return its revno"""
914
if _mod_revision.is_null(revision_id):
916
history = self.revision_history()
918
return history.index(revision_id) + 1
920
raise errors.NoSuchRevision(self, revision_id)
923
def get_rev_id(self, revno, history=None):
924
"""Find the revision id of the specified revno."""
926
return _mod_revision.NULL_REVISION
927
last_revno, last_revid = self.last_revision_info()
928
if revno == last_revno:
930
if revno <= 0 or revno > last_revno:
931
raise errors.NoSuchRevision(self, revno)
932
distance_from_last = last_revno - revno
933
if len(self._partial_revision_history_cache) <= distance_from_last:
934
self._extend_partial_history(distance_from_last)
935
return self._partial_revision_history_cache[distance_from_last]
938
def pull(self, source, overwrite=False, stop_revision=None,
939
possible_transports=None, *args, **kwargs):
940
"""Mirror source into this branch.
942
This branch is considered to be 'local', having low latency.
944
:returns: PullResult instance
946
return InterBranch.get(source, self).pull(overwrite=overwrite,
947
stop_revision=stop_revision,
948
possible_transports=possible_transports, *args, **kwargs)
950
def push(self, target, overwrite=False, stop_revision=None, *args,
952
"""Mirror this branch into target.
954
This branch is considered to be 'local', having low latency.
956
return InterBranch.get(self, target).push(overwrite, stop_revision,
959
def lossy_push(self, target, stop_revision=None):
960
"""Push deltas into another branch.
962
:note: This does not, like push, retain the revision ids from
963
the source branch and will, rather than adding bzr-specific
964
metadata, push only those semantics of the revision that can be
965
natively represented by this branch' VCS.
967
:param target: Target branch
968
:param stop_revision: Revision to push, defaults to last revision.
969
:return: BranchPushResult with an extra member revidmap:
970
A dictionary mapping revision ids from the target branch
971
to new revision ids in the target branch, for each
972
revision that was pushed.
974
inter = InterBranch.get(self, target)
975
lossy_push = getattr(inter, "lossy_push", None)
976
if lossy_push is None:
977
raise errors.LossyPushToSameVCS(self, target)
978
return lossy_push(stop_revision)
980
def basis_tree(self):
981
"""Return `Tree` object for last revision."""
982
return self.repository.revision_tree(self.last_revision())
984
def get_parent(self):
985
"""Return the parent location of the branch.
987
This is the default location for pull/missing. The usual
988
pattern is that the user can override it by specifying a
991
parent = self._get_parent_location()
994
# This is an old-format absolute path to a local branch
996
if parent.startswith('/'):
997
parent = urlutils.local_path_to_url(parent.decode('utf8'))
999
return urlutils.join(self.base[:-1], parent)
1000
except errors.InvalidURLJoin, e:
1001
raise errors.InaccessibleParent(parent, self.base)
1003
def _get_parent_location(self):
1004
raise NotImplementedError(self._get_parent_location)
1006
def _set_config_location(self, name, url, config=None,
1007
make_relative=False):
1009
config = self.get_config()
1013
url = urlutils.relative_url(self.base, url)
1014
config.set_user_option(name, url, warn_masked=True)
1016
def _get_config_location(self, name, config=None):
1018
config = self.get_config()
1019
location = config.get_user_option(name)
1024
def get_child_submit_format(self):
1025
"""Return the preferred format of submissions to this branch."""
1026
return self.get_config().get_user_option("child_submit_format")
1028
def get_submit_branch(self):
1029
"""Return the submit location of the branch.
1031
This is the default location for bundle. The usual
1032
pattern is that the user can override it by specifying a
1035
return self.get_config().get_user_option('submit_branch')
1037
def set_submit_branch(self, location):
1038
"""Return the submit location of the branch.
1040
This is the default location for bundle. The usual
1041
pattern is that the user can override it by specifying a
1044
self.get_config().set_user_option('submit_branch', location,
1047
def get_public_branch(self):
1048
"""Return the public location of the branch.
1050
This is used by merge directives.
1052
return self._get_config_location('public_branch')
1054
def set_public_branch(self, location):
1055
"""Return the submit location of the branch.
1057
This is the default location for bundle. The usual
1058
pattern is that the user can override it by specifying a
1061
self._set_config_location('public_branch', location)
1063
def get_push_location(self):
1064
"""Return the None or the location to push this branch to."""
1065
push_loc = self.get_config().get_user_option('push_location')
1068
def set_push_location(self, location):
1069
"""Set a new push location for this branch."""
1070
raise NotImplementedError(self.set_push_location)
1072
def _run_post_change_branch_tip_hooks(self, old_revno, old_revid):
1073
"""Run the post_change_branch_tip hooks."""
1074
hooks = Branch.hooks['post_change_branch_tip']
1077
new_revno, new_revid = self.last_revision_info()
1078
params = ChangeBranchTipParams(
1079
self, old_revno, new_revno, old_revid, new_revid)
1083
def _run_pre_change_branch_tip_hooks(self, new_revno, new_revid):
1084
"""Run the pre_change_branch_tip hooks."""
1085
hooks = Branch.hooks['pre_change_branch_tip']
1088
old_revno, old_revid = self.last_revision_info()
1089
params = ChangeBranchTipParams(
1090
self, old_revno, new_revno, old_revid, new_revid)
1094
except errors.TipChangeRejected:
1097
exc_info = sys.exc_info()
1098
hook_name = Branch.hooks.get_hook_name(hook)
1099
raise errors.HookFailed(
1100
'pre_change_branch_tip', hook_name, exc_info)
1104
"""Synchronise this branch with the master branch if any.
1106
:return: None or the last_revision pivoted out during the update.
1110
def check_revno(self, revno):
1112
Check whether a revno corresponds to any revision.
1113
Zero (the NULL revision) is considered valid.
1116
self.check_real_revno(revno)
1118
def check_real_revno(self, revno):
1120
Check whether a revno corresponds to a real revision.
1121
Zero (the NULL revision) is considered invalid
1123
if revno < 1 or revno > self.revno():
1124
raise errors.InvalidRevisionNumber(revno)
1127
def clone(self, to_bzrdir, revision_id=None, repository_policy=None):
1128
"""Clone this branch into to_bzrdir preserving all semantic values.
1130
Most API users will want 'create_clone_on_transport', which creates a
1131
new bzrdir and branch on the fly.
1133
revision_id: if not None, the revision history in the new branch will
1134
be truncated to end with revision_id.
1136
result = to_bzrdir.create_branch()
1139
if repository_policy is not None:
1140
repository_policy.configure_branch(result)
1141
self.copy_content_into(result, revision_id=revision_id)
1147
def sprout(self, to_bzrdir, revision_id=None, repository_policy=None):
1148
"""Create a new line of development from the branch, into to_bzrdir.
1150
to_bzrdir controls the branch format.
1152
revision_id: if not None, the revision history in the new branch will
1153
be truncated to end with revision_id.
1155
if (repository_policy is not None and
1156
repository_policy.requires_stacking()):
1157
to_bzrdir._format.require_stacking(_skip_repo=True)
1158
result = to_bzrdir.create_branch()
1161
if repository_policy is not None:
1162
repository_policy.configure_branch(result)
1163
self.copy_content_into(result, revision_id=revision_id)
1164
result.set_parent(self.bzrdir.root_transport.base)
1169
def _synchronize_history(self, destination, revision_id):
1170
"""Synchronize last revision and revision history between branches.
1172
This version is most efficient when the destination is also a
1173
BzrBranch6, but works for BzrBranch5, as long as the destination's
1174
repository contains all the lefthand ancestors of the intended
1175
last_revision. If not, set_last_revision_info will fail.
1177
:param destination: The branch to copy the history into
1178
:param revision_id: The revision-id to truncate history at. May
1179
be None to copy complete history.
1181
source_revno, source_revision_id = self.last_revision_info()
1182
if revision_id is None:
1183
revno, revision_id = source_revno, source_revision_id
1185
graph = self.repository.get_graph()
1187
revno = graph.find_distance_to_null(revision_id,
1188
[(source_revision_id, source_revno)])
1189
except errors.GhostRevisionsHaveNoRevno:
1190
# Default to 1, if we can't find anything else
1192
destination.set_last_revision_info(revno, revision_id)
1195
def copy_content_into(self, destination, revision_id=None):
1196
"""Copy the content of self into destination.
1198
revision_id: if not None, the revision history in the new branch will
1199
be truncated to end with revision_id.
1201
self.update_references(destination)
1202
self._synchronize_history(destination, revision_id)
1204
parent = self.get_parent()
1205
except errors.InaccessibleParent, e:
1206
mutter('parent was not accessible to copy: %s', e)
1209
destination.set_parent(parent)
1210
if self._push_should_merge_tags():
1211
self.tags.merge_to(destination.tags)
1213
def update_references(self, target):
1214
if not getattr(self._format, 'supports_reference_locations', False):
1216
reference_dict = self._get_all_reference_info()
1217
if len(reference_dict) == 0:
1219
old_base = self.base
1220
new_base = target.base
1221
target_reference_dict = target._get_all_reference_info()
1222
for file_id, (tree_path, branch_location) in (
1223
reference_dict.items()):
1224
branch_location = urlutils.rebase_url(branch_location,
1226
target_reference_dict.setdefault(
1227
file_id, (tree_path, branch_location))
1228
target._set_all_reference_info(target_reference_dict)
1231
def check(self, refs):
1232
"""Check consistency of the branch.
1234
In particular this checks that revisions given in the revision-history
1235
do actually match up in the revision graph, and that they're all
1236
present in the repository.
1238
Callers will typically also want to check the repository.
1240
:param refs: Calculated refs for this branch as specified by
1241
branch._get_check_refs()
1242
:return: A BranchCheckResult.
1244
result = BranchCheckResult(self)
1245
last_revno, last_revision_id = self.last_revision_info()
1246
actual_revno = refs[('lefthand-distance', last_revision_id)]
1247
if actual_revno != last_revno:
1248
result.errors.append(errors.BzrCheckError(
1249
'revno does not match len(mainline) %s != %s' % (
1250
last_revno, actual_revno)))
1251
# TODO: We should probably also check that self.revision_history
1252
# matches the repository for older branch formats.
1253
# If looking for the code that cross-checks repository parents against
1254
# the iter_reverse_revision_history output, that is now a repository
1258
def _get_checkout_format(self):
1259
"""Return the most suitable metadir for a checkout of this branch.
1260
Weaves are used if this branch's repository uses weaves.
1262
if isinstance(self.bzrdir, bzrdir.BzrDirPreSplitOut):
1263
from bzrlib.repofmt import weaverepo
1264
format = bzrdir.BzrDirMetaFormat1()
1265
format.repository_format = weaverepo.RepositoryFormat7()
1267
format = self.repository.bzrdir.checkout_metadir()
1268
format.set_branch_format(self._format)
1271
def create_clone_on_transport(self, to_transport, revision_id=None,
1272
stacked_on=None, create_prefix=False, use_existing_dir=False):
1273
"""Create a clone of this branch and its bzrdir.
1275
:param to_transport: The transport to clone onto.
1276
:param revision_id: The revision id to use as tip in the new branch.
1277
If None the tip is obtained from this branch.
1278
:param stacked_on: An optional URL to stack the clone on.
1279
:param create_prefix: Create any missing directories leading up to
1281
:param use_existing_dir: Use an existing directory if one exists.
1283
# XXX: Fix the bzrdir API to allow getting the branch back from the
1284
# clone call. Or something. 20090224 RBC/spiv.
1285
if revision_id is None:
1286
revision_id = self.last_revision()
1287
dir_to = self.bzrdir.clone_on_transport(to_transport,
1288
revision_id=revision_id, stacked_on=stacked_on,
1289
create_prefix=create_prefix, use_existing_dir=use_existing_dir)
1290
return dir_to.open_branch()
1292
def create_checkout(self, to_location, revision_id=None,
1293
lightweight=False, accelerator_tree=None,
1295
"""Create a checkout of a branch.
1297
:param to_location: The url to produce the checkout at
1298
:param revision_id: The revision to check out
1299
:param lightweight: If True, produce a lightweight checkout, otherwise,
1300
produce a bound branch (heavyweight checkout)
1301
:param accelerator_tree: A tree which can be used for retrieving file
1302
contents more quickly than the revision tree, i.e. a workingtree.
1303
The revision tree will be used for cases where accelerator_tree's
1304
content is different.
1305
:param hardlink: If true, hard-link files from accelerator_tree,
1307
:return: The tree of the created checkout
1309
t = transport.get_transport(to_location)
1312
format = self._get_checkout_format()
1313
checkout = format.initialize_on_transport(t)
1314
from_branch = BranchReferenceFormat().initialize(checkout, self)
1316
format = self._get_checkout_format()
1317
checkout_branch = bzrdir.BzrDir.create_branch_convenience(
1318
to_location, force_new_tree=False, format=format)
1319
checkout = checkout_branch.bzrdir
1320
checkout_branch.bind(self)
1321
# pull up to the specified revision_id to set the initial
1322
# branch tip correctly, and seed it with history.
1323
checkout_branch.pull(self, stop_revision=revision_id)
1325
tree = checkout.create_workingtree(revision_id,
1326
from_branch=from_branch,
1327
accelerator_tree=accelerator_tree,
1329
basis_tree = tree.basis_tree()
1330
basis_tree.lock_read()
1332
for path, file_id in basis_tree.iter_references():
1333
reference_parent = self.reference_parent(file_id, path)
1334
reference_parent.create_checkout(tree.abspath(path),
1335
basis_tree.get_reference_revision(file_id, path),
1342
def reconcile(self, thorough=True):
1343
"""Make sure the data stored in this branch is consistent."""
1344
from bzrlib.reconcile import BranchReconciler
1345
reconciler = BranchReconciler(self, thorough=thorough)
1346
reconciler.reconcile()
1349
def reference_parent(self, file_id, path, possible_transports=None):
1350
"""Return the parent branch for a tree-reference file_id
1351
:param file_id: The file_id of the tree reference
1352
:param path: The path of the file_id in the tree
1353
:return: A branch associated with the file_id
1355
# FIXME should provide multiple branches, based on config
1356
return Branch.open(self.bzrdir.root_transport.clone(path).base,
1357
possible_transports=possible_transports)
1359
def supports_tags(self):
1360
return self._format.supports_tags()
1362
def _check_if_descendant_or_diverged(self, revision_a, revision_b, graph,
1364
"""Ensure that revision_b is a descendant of revision_a.
1366
This is a helper function for update_revisions.
1368
:raises: DivergedBranches if revision_b has diverged from revision_a.
1369
:returns: True if revision_b is a descendant of revision_a.
1371
relation = self._revision_relations(revision_a, revision_b, graph)
1372
if relation == 'b_descends_from_a':
1374
elif relation == 'diverged':
1375
raise errors.DivergedBranches(self, other_branch)
1376
elif relation == 'a_descends_from_b':
1379
raise AssertionError("invalid relation: %r" % (relation,))
1381
def _revision_relations(self, revision_a, revision_b, graph):
1382
"""Determine the relationship between two revisions.
1384
:returns: One of: 'a_descends_from_b', 'b_descends_from_a', 'diverged'
1386
heads = graph.heads([revision_a, revision_b])
1387
if heads == set([revision_b]):
1388
return 'b_descends_from_a'
1389
elif heads == set([revision_a, revision_b]):
1390
# These branches have diverged
1392
elif heads == set([revision_a]):
1393
return 'a_descends_from_b'
1395
raise AssertionError("invalid heads: %r" % (heads,))
1398
class BranchFormat(object):
1399
"""An encapsulation of the initialization and open routines for a format.
1401
Formats provide three things:
1402
* An initialization routine,
1406
Formats are placed in an dict by their format string for reference
1407
during branch opening. Its not required that these be instances, they
1408
can be classes themselves with class methods - it simply depends on
1409
whether state is needed for a given format or not.
1411
Once a format is deprecated, just deprecate the initialize and open
1412
methods on the format class. Do not deprecate the object, as the
1413
object will be created every time regardless.
1416
_default_format = None
1417
"""The default format used for new branches."""
1420
"""The known formats."""
1422
can_set_append_revisions_only = True
1424
def __eq__(self, other):
1425
return self.__class__ is other.__class__
1427
def __ne__(self, other):
1428
return not (self == other)
1431
def find_format(klass, a_bzrdir):
1432
"""Return the format for the branch object in a_bzrdir."""
1434
transport = a_bzrdir.get_branch_transport(None)
1435
format_string = transport.get("format").read()
1436
return klass._formats[format_string]
1437
except errors.NoSuchFile:
1438
raise errors.NotBranchError(path=transport.base)
1440
raise errors.UnknownFormatError(format=format_string, kind='branch')
1443
def get_default_format(klass):
1444
"""Return the current default format."""
1445
return klass._default_format
1447
def get_reference(self, a_bzrdir):
1448
"""Get the target reference of the branch in a_bzrdir.
1450
format probing must have been completed before calling
1451
this method - it is assumed that the format of the branch
1452
in a_bzrdir is correct.
1454
:param a_bzrdir: The bzrdir to get the branch data from.
1455
:return: None if the branch is not a reference branch.
1460
def set_reference(self, a_bzrdir, to_branch):
1461
"""Set the target reference of the branch in a_bzrdir.
1463
format probing must have been completed before calling
1464
this method - it is assumed that the format of the branch
1465
in a_bzrdir is correct.
1467
:param a_bzrdir: The bzrdir to set the branch reference for.
1468
:param to_branch: branch that the checkout is to reference
1470
raise NotImplementedError(self.set_reference)
1472
def get_format_string(self):
1473
"""Return the ASCII format string that identifies this format."""
1474
raise NotImplementedError(self.get_format_string)
1476
def get_format_description(self):
1477
"""Return the short format description for this format."""
1478
raise NotImplementedError(self.get_format_description)
1480
def _initialize_helper(self, a_bzrdir, utf8_files, lock_type='metadir',
1482
"""Initialize a branch in a bzrdir, with specified files
1484
:param a_bzrdir: The bzrdir to initialize the branch in
1485
:param utf8_files: The files to create as a list of
1486
(filename, content) tuples
1487
:param set_format: If True, set the format with
1488
self.get_format_string. (BzrBranch4 has its format set
1490
:return: a branch in this format
1492
mutter('creating branch %r in %s', self, a_bzrdir.transport.base)
1493
branch_transport = a_bzrdir.get_branch_transport(self)
1495
'metadir': ('lock', lockdir.LockDir),
1496
'branch4': ('branch-lock', lockable_files.TransportLock),
1498
lock_name, lock_class = lock_map[lock_type]
1499
control_files = lockable_files.LockableFiles(branch_transport,
1500
lock_name, lock_class)
1501
control_files.create_lock()
1503
control_files.lock_write()
1504
except errors.LockContention:
1505
if lock_type != 'branch4':
1511
utf8_files += [('format', self.get_format_string())]
1513
for (filename, content) in utf8_files:
1514
branch_transport.put_bytes(
1516
mode=a_bzrdir._get_file_mode())
1519
control_files.unlock()
1520
return self.open(a_bzrdir, _found=True)
1522
def initialize(self, a_bzrdir):
1523
"""Create a branch of this format in a_bzrdir."""
1524
raise NotImplementedError(self.initialize)
1526
def is_supported(self):
1527
"""Is this format supported?
1529
Supported formats can be initialized and opened.
1530
Unsupported formats may not support initialization or committing or
1531
some other features depending on the reason for not being supported.
1535
def make_tags(self, branch):
1536
"""Create a tags object for branch.
1538
This method is on BranchFormat, because BranchFormats are reflected
1539
over the wire via network_name(), whereas full Branch instances require
1540
multiple VFS method calls to operate at all.
1542
The default implementation returns a disabled-tags instance.
1544
Note that it is normal for branch to be a RemoteBranch when using tags
1547
return DisabledTags(branch)
1549
def network_name(self):
1550
"""A simple byte string uniquely identifying this format for RPC calls.
1552
MetaDir branch formats use their disk format string to identify the
1553
repository over the wire. All in one formats such as bzr < 0.8, and
1554
foreign formats like svn/git and hg should use some marker which is
1555
unique and immutable.
1557
raise NotImplementedError(self.network_name)
1559
def open(self, a_bzrdir, _found=False, ignore_fallbacks=False):
1560
"""Return the branch object for a_bzrdir
1562
:param a_bzrdir: A BzrDir that contains a branch.
1563
:param _found: a private parameter, do not use it. It is used to
1564
indicate if format probing has already be done.
1565
:param ignore_fallbacks: when set, no fallback branches will be opened
1566
(if there are any). Default is to open fallbacks.
1568
raise NotImplementedError(self.open)
1571
def register_format(klass, format):
1572
"""Register a metadir format."""
1573
klass._formats[format.get_format_string()] = format
1574
# Metadir formats have a network name of their format string, and get
1575
# registered as class factories.
1576
network_format_registry.register(format.get_format_string(), format.__class__)
1579
def set_default_format(klass, format):
1580
klass._default_format = format
1582
def supports_set_append_revisions_only(self):
1583
"""True if this format supports set_append_revisions_only."""
1586
def supports_stacking(self):
1587
"""True if this format records a stacked-on branch."""
1591
def unregister_format(klass, format):
1592
del klass._formats[format.get_format_string()]
1595
return self.get_format_description().rstrip()
1597
def supports_tags(self):
1598
"""True if this format supports tags stored in the branch"""
1599
return False # by default
1602
class BranchHooks(Hooks):
1603
"""A dictionary mapping hook name to a list of callables for branch hooks.
1605
e.g. ['set_rh'] Is the list of items to be called when the
1606
set_revision_history function is invoked.
1610
"""Create the default hooks.
1612
These are all empty initially, because by default nothing should get
1615
Hooks.__init__(self)
1616
self.create_hook(HookPoint('set_rh',
1617
"Invoked whenever the revision history has been set via "
1618
"set_revision_history. The api signature is (branch, "
1619
"revision_history), and the branch will be write-locked. "
1620
"The set_rh hook can be expensive for bzr to trigger, a better "
1621
"hook to use is Branch.post_change_branch_tip.", (0, 15), None))
1622
self.create_hook(HookPoint('open',
1623
"Called with the Branch object that has been opened after a "
1624
"branch is opened.", (1, 8), None))
1625
self.create_hook(HookPoint('post_push',
1626
"Called after a push operation completes. post_push is called "
1627
"with a bzrlib.branch.BranchPushResult object and only runs in the "
1628
"bzr client.", (0, 15), None))
1629
self.create_hook(HookPoint('post_pull',
1630
"Called after a pull operation completes. post_pull is called "
1631
"with a bzrlib.branch.PullResult object and only runs in the "
1632
"bzr client.", (0, 15), None))
1633
self.create_hook(HookPoint('pre_commit',
1634
"Called after a commit is calculated but before it is is "
1635
"completed. pre_commit is called with (local, master, old_revno, "
1636
"old_revid, future_revno, future_revid, tree_delta, future_tree"
1637
"). old_revid is NULL_REVISION for the first commit to a branch, "
1638
"tree_delta is a TreeDelta object describing changes from the "
1639
"basis revision. hooks MUST NOT modify this delta. "
1640
" future_tree is an in-memory tree obtained from "
1641
"CommitBuilder.revision_tree() and hooks MUST NOT modify this "
1642
"tree.", (0,91), None))
1643
self.create_hook(HookPoint('post_commit',
1644
"Called in the bzr client after a commit has completed. "
1645
"post_commit is called with (local, master, old_revno, old_revid, "
1646
"new_revno, new_revid). old_revid is NULL_REVISION for the first "
1647
"commit to a branch.", (0, 15), None))
1648
self.create_hook(HookPoint('post_uncommit',
1649
"Called in the bzr client after an uncommit completes. "
1650
"post_uncommit is called with (local, master, old_revno, "
1651
"old_revid, new_revno, new_revid) where local is the local branch "
1652
"or None, master is the target branch, and an empty branch "
1653
"receives new_revno of 0, new_revid of None.", (0, 15), None))
1654
self.create_hook(HookPoint('pre_change_branch_tip',
1655
"Called in bzr client and server before a change to the tip of a "
1656
"branch is made. pre_change_branch_tip is called with a "
1657
"bzrlib.branch.ChangeBranchTipParams. Note that push, pull, "
1658
"commit, uncommit will all trigger this hook.", (1, 6), None))
1659
self.create_hook(HookPoint('post_change_branch_tip',
1660
"Called in bzr client and server after a change to the tip of a "
1661
"branch is made. post_change_branch_tip is called with a "
1662
"bzrlib.branch.ChangeBranchTipParams. Note that push, pull, "
1663
"commit, uncommit will all trigger this hook.", (1, 4), None))
1664
self.create_hook(HookPoint('transform_fallback_location',
1665
"Called when a stacked branch is activating its fallback "
1666
"locations. transform_fallback_location is called with (branch, "
1667
"url), and should return a new url. Returning the same url "
1668
"allows it to be used as-is, returning a different one can be "
1669
"used to cause the branch to stack on a closer copy of that "
1670
"fallback_location. Note that the branch cannot have history "
1671
"accessing methods called on it during this hook because the "
1672
"fallback locations have not been activated. When there are "
1673
"multiple hooks installed for transform_fallback_location, "
1674
"all are called with the url returned from the previous hook."
1675
"The order is however undefined.", (1, 9), None))
1678
# install the default hooks into the Branch class.
1679
Branch.hooks = BranchHooks()
1682
class ChangeBranchTipParams(object):
1683
"""Object holding parameters passed to *_change_branch_tip hooks.
1685
There are 5 fields that hooks may wish to access:
1687
:ivar branch: the branch being changed
1688
:ivar old_revno: revision number before the change
1689
:ivar new_revno: revision number after the change
1690
:ivar old_revid: revision id before the change
1691
:ivar new_revid: revision id after the change
1693
The revid fields are strings. The revno fields are integers.
1696
def __init__(self, branch, old_revno, new_revno, old_revid, new_revid):
1697
"""Create a group of ChangeBranchTip parameters.
1699
:param branch: The branch being changed.
1700
:param old_revno: Revision number before the change.
1701
:param new_revno: Revision number after the change.
1702
:param old_revid: Tip revision id before the change.
1703
:param new_revid: Tip revision id after the change.
1705
self.branch = branch
1706
self.old_revno = old_revno
1707
self.new_revno = new_revno
1708
self.old_revid = old_revid
1709
self.new_revid = new_revid
1711
def __eq__(self, other):
1712
return self.__dict__ == other.__dict__
1715
return "<%s of %s from (%s, %s) to (%s, %s)>" % (
1716
self.__class__.__name__, self.branch,
1717
self.old_revno, self.old_revid, self.new_revno, self.new_revid)
1720
class BzrBranchFormat4(BranchFormat):
1721
"""Bzr branch format 4.
1724
- a revision-history file.
1725
- a branch-lock lock file [ to be shared with the bzrdir ]
1728
def get_format_description(self):
1729
"""See BranchFormat.get_format_description()."""
1730
return "Branch format 4"
1732
def initialize(self, a_bzrdir):
1733
"""Create a branch of this format in a_bzrdir."""
1734
utf8_files = [('revision-history', ''),
1735
('branch-name', ''),
1737
return self._initialize_helper(a_bzrdir, utf8_files,
1738
lock_type='branch4', set_format=False)
1741
super(BzrBranchFormat4, self).__init__()
1742
self._matchingbzrdir = bzrdir.BzrDirFormat6()
1744
def network_name(self):
1745
"""The network name for this format is the control dirs disk label."""
1746
return self._matchingbzrdir.get_format_string()
1748
def open(self, a_bzrdir, _found=False, ignore_fallbacks=False):
1749
"""See BranchFormat.open()."""
1751
# we are being called directly and must probe.
1752
raise NotImplementedError
1753
return BzrBranch(_format=self,
1754
_control_files=a_bzrdir._control_files,
1756
_repository=a_bzrdir.open_repository())
1759
return "Bazaar-NG branch format 4"
1762
class BranchFormatMetadir(BranchFormat):
1763
"""Common logic for meta-dir based branch formats."""
1765
def _branch_class(self):
1766
"""What class to instantiate on open calls."""
1767
raise NotImplementedError(self._branch_class)
1769
def network_name(self):
1770
"""A simple byte string uniquely identifying this format for RPC calls.
1772
Metadir branch formats use their format string.
1774
return self.get_format_string()
1776
def open(self, a_bzrdir, _found=False, ignore_fallbacks=False):
1777
"""See BranchFormat.open()."""
1779
format = BranchFormat.find_format(a_bzrdir)
1780
if format.__class__ != self.__class__:
1781
raise AssertionError("wrong format %r found for %r" %
1784
transport = a_bzrdir.get_branch_transport(None)
1785
control_files = lockable_files.LockableFiles(transport, 'lock',
1787
return self._branch_class()(_format=self,
1788
_control_files=control_files,
1790
_repository=a_bzrdir.find_repository(),
1791
ignore_fallbacks=ignore_fallbacks)
1792
except errors.NoSuchFile:
1793
raise errors.NotBranchError(path=transport.base)
1796
super(BranchFormatMetadir, self).__init__()
1797
self._matchingbzrdir = bzrdir.BzrDirMetaFormat1()
1798
self._matchingbzrdir.set_branch_format(self)
1800
def supports_tags(self):
1804
class BzrBranchFormat5(BranchFormatMetadir):
1805
"""Bzr branch format 5.
1808
- a revision-history file.
1810
- a lock dir guarding the branch itself
1811
- all of this stored in a branch/ subdirectory
1812
- works with shared repositories.
1814
This format is new in bzr 0.8.
1817
def _branch_class(self):
1820
def get_format_string(self):
1821
"""See BranchFormat.get_format_string()."""
1822
return "Bazaar-NG branch format 5\n"
1824
def get_format_description(self):
1825
"""See BranchFormat.get_format_description()."""
1826
return "Branch format 5"
1828
def initialize(self, a_bzrdir):
1829
"""Create a branch of this format in a_bzrdir."""
1830
utf8_files = [('revision-history', ''),
1831
('branch-name', ''),
1833
return self._initialize_helper(a_bzrdir, utf8_files)
1835
def supports_tags(self):
1839
class BzrBranchFormat6(BranchFormatMetadir):
1840
"""Branch format with last-revision and tags.
1842
Unlike previous formats, this has no explicit revision history. Instead,
1843
this just stores the last-revision, and the left-hand history leading
1844
up to there is the history.
1846
This format was introduced in bzr 0.15
1847
and became the default in 0.91.
1850
def _branch_class(self):
1853
def get_format_string(self):
1854
"""See BranchFormat.get_format_string()."""
1855
return "Bazaar Branch Format 6 (bzr 0.15)\n"
1857
def get_format_description(self):
1858
"""See BranchFormat.get_format_description()."""
1859
return "Branch format 6"
1861
def initialize(self, a_bzrdir):
1862
"""Create a branch of this format in a_bzrdir."""
1863
utf8_files = [('last-revision', '0 null:\n'),
1864
('branch.conf', ''),
1867
return self._initialize_helper(a_bzrdir, utf8_files)
1869
def make_tags(self, branch):
1870
"""See bzrlib.branch.BranchFormat.make_tags()."""
1871
return BasicTags(branch)
1873
def supports_set_append_revisions_only(self):
1877
class BzrBranchFormat8(BranchFormatMetadir):
1878
"""Metadir format supporting storing locations of subtree branches."""
1880
def _branch_class(self):
1883
def get_format_string(self):
1884
"""See BranchFormat.get_format_string()."""
1885
return "Bazaar Branch Format 8 (needs bzr 1.15)\n"
1887
def get_format_description(self):
1888
"""See BranchFormat.get_format_description()."""
1889
return "Branch format 8"
1891
def initialize(self, a_bzrdir):
1892
"""Create a branch of this format in a_bzrdir."""
1893
utf8_files = [('last-revision', '0 null:\n'),
1894
('branch.conf', ''),
1898
return self._initialize_helper(a_bzrdir, utf8_files)
1901
super(BzrBranchFormat8, self).__init__()
1902
self._matchingbzrdir.repository_format = \
1903
RepositoryFormatKnitPack5RichRoot()
1905
def make_tags(self, branch):
1906
"""See bzrlib.branch.BranchFormat.make_tags()."""
1907
return BasicTags(branch)
1909
def supports_set_append_revisions_only(self):
1912
def supports_stacking(self):
1915
supports_reference_locations = True
1918
class BzrBranchFormat7(BzrBranchFormat8):
1919
"""Branch format with last-revision, tags, and a stacked location pointer.
1921
The stacked location pointer is passed down to the repository and requires
1922
a repository format with supports_external_lookups = True.
1924
This format was introduced in bzr 1.6.
1927
def initialize(self, a_bzrdir):
1928
"""Create a branch of this format in a_bzrdir."""
1929
utf8_files = [('last-revision', '0 null:\n'),
1930
('branch.conf', ''),
1933
return self._initialize_helper(a_bzrdir, utf8_files)
1935
def _branch_class(self):
1938
def get_format_string(self):
1939
"""See BranchFormat.get_format_string()."""
1940
return "Bazaar Branch Format 7 (needs bzr 1.6)\n"
1942
def get_format_description(self):
1943
"""See BranchFormat.get_format_description()."""
1944
return "Branch format 7"
1946
def supports_set_append_revisions_only(self):
1949
supports_reference_locations = False
1952
class BranchReferenceFormat(BranchFormat):
1953
"""Bzr branch reference format.
1955
Branch references are used in implementing checkouts, they
1956
act as an alias to the real branch which is at some other url.
1963
def get_format_string(self):
1964
"""See BranchFormat.get_format_string()."""
1965
return "Bazaar-NG Branch Reference Format 1\n"
1967
def get_format_description(self):
1968
"""See BranchFormat.get_format_description()."""
1969
return "Checkout reference format 1"
1971
def get_reference(self, a_bzrdir):
1972
"""See BranchFormat.get_reference()."""
1973
transport = a_bzrdir.get_branch_transport(None)
1974
return transport.get('location').read()
1976
def set_reference(self, a_bzrdir, to_branch):
1977
"""See BranchFormat.set_reference()."""
1978
transport = a_bzrdir.get_branch_transport(None)
1979
location = transport.put_bytes('location', to_branch.base)
1981
def initialize(self, a_bzrdir, target_branch=None):
1982
"""Create a branch of this format in a_bzrdir."""
1983
if target_branch is None:
1984
# this format does not implement branch itself, thus the implicit
1985
# creation contract must see it as uninitializable
1986
raise errors.UninitializableFormat(self)
1987
mutter('creating branch reference in %s', a_bzrdir.transport.base)
1988
branch_transport = a_bzrdir.get_branch_transport(self)
1989
branch_transport.put_bytes('location',
1990
target_branch.bzrdir.root_transport.base)
1991
branch_transport.put_bytes('format', self.get_format_string())
1993
a_bzrdir, _found=True,
1994
possible_transports=[target_branch.bzrdir.root_transport])
1997
super(BranchReferenceFormat, self).__init__()
1998
self._matchingbzrdir = bzrdir.BzrDirMetaFormat1()
1999
self._matchingbzrdir.set_branch_format(self)
2001
def _make_reference_clone_function(format, a_branch):
2002
"""Create a clone() routine for a branch dynamically."""
2003
def clone(to_bzrdir, revision_id=None,
2004
repository_policy=None):
2005
"""See Branch.clone()."""
2006
return format.initialize(to_bzrdir, a_branch)
2007
# cannot obey revision_id limits when cloning a reference ...
2008
# FIXME RBC 20060210 either nuke revision_id for clone, or
2009
# emit some sort of warning/error to the caller ?!
2012
def open(self, a_bzrdir, _found=False, location=None,
2013
possible_transports=None, ignore_fallbacks=False):
2014
"""Return the branch that the branch reference in a_bzrdir points at.
2016
:param a_bzrdir: A BzrDir that contains a branch.
2017
:param _found: a private parameter, do not use it. It is used to
2018
indicate if format probing has already be done.
2019
:param ignore_fallbacks: when set, no fallback branches will be opened
2020
(if there are any). Default is to open fallbacks.
2021
:param location: The location of the referenced branch. If
2022
unspecified, this will be determined from the branch reference in
2024
:param possible_transports: An optional reusable transports list.
2027
format = BranchFormat.find_format(a_bzrdir)
2028
if format.__class__ != self.__class__:
2029
raise AssertionError("wrong format %r found for %r" %
2031
if location is None:
2032
location = self.get_reference(a_bzrdir)
2033
real_bzrdir = bzrdir.BzrDir.open(
2034
location, possible_transports=possible_transports)
2035
result = real_bzrdir.open_branch(ignore_fallbacks=ignore_fallbacks)
2036
# this changes the behaviour of result.clone to create a new reference
2037
# rather than a copy of the content of the branch.
2038
# I did not use a proxy object because that needs much more extensive
2039
# testing, and we are only changing one behaviour at the moment.
2040
# If we decide to alter more behaviours - i.e. the implicit nickname
2041
# then this should be refactored to introduce a tested proxy branch
2042
# and a subclass of that for use in overriding clone() and ....
2044
result.clone = self._make_reference_clone_function(result)
2048
network_format_registry = registry.FormatRegistry()
2049
"""Registry of formats indexed by their network name.
2051
The network name for a branch format is an identifier that can be used when
2052
referring to formats with smart server operations. See
2053
BranchFormat.network_name() for more detail.
2057
# formats which have no format string are not discoverable
2058
# and not independently creatable, so are not registered.
2059
__format5 = BzrBranchFormat5()
2060
__format6 = BzrBranchFormat6()
2061
__format7 = BzrBranchFormat7()
2062
__format8 = BzrBranchFormat8()
2063
BranchFormat.register_format(__format5)
2064
BranchFormat.register_format(BranchReferenceFormat())
2065
BranchFormat.register_format(__format6)
2066
BranchFormat.register_format(__format7)
2067
BranchFormat.register_format(__format8)
2068
BranchFormat.set_default_format(__format7)
2069
_legacy_formats = [BzrBranchFormat4(),
2071
network_format_registry.register(
2072
_legacy_formats[0].network_name(), _legacy_formats[0].__class__)
2075
class BzrBranch(Branch):
2076
"""A branch stored in the actual filesystem.
2078
Note that it's "local" in the context of the filesystem; it doesn't
2079
really matter if it's on an nfs/smb/afs/coda/... share, as long as
2080
it's writable, and can be accessed via the normal filesystem API.
2082
:ivar _transport: Transport for file operations on this branch's
2083
control files, typically pointing to the .bzr/branch directory.
2084
:ivar repository: Repository for this branch.
2085
:ivar base: The url of the base directory for this branch; the one
2086
containing the .bzr directory.
2089
def __init__(self, _format=None,
2090
_control_files=None, a_bzrdir=None, _repository=None,
2091
ignore_fallbacks=False):
2092
"""Create new branch object at a particular location."""
2093
if a_bzrdir is None:
2094
raise ValueError('a_bzrdir must be supplied')
2096
self.bzrdir = a_bzrdir
2097
self._base = self.bzrdir.transport.clone('..').base
2098
# XXX: We should be able to just do
2099
# self.base = self.bzrdir.root_transport.base
2100
# but this does not quite work yet -- mbp 20080522
2101
self._format = _format
2102
if _control_files is None:
2103
raise ValueError('BzrBranch _control_files is None')
2104
self.control_files = _control_files
2105
self._transport = _control_files._transport
2106
self.repository = _repository
2107
Branch.__init__(self)
2110
return '%s(%r)' % (self.__class__.__name__, self.base)
2114
def _get_base(self):
2115
"""Returns the directory containing the control directory."""
2118
base = property(_get_base, doc="The URL for the root of this branch.")
2120
def _get_config(self):
2121
return TransportConfig(self._transport, 'branch.conf')
2123
def is_locked(self):
2124
return self.control_files.is_locked()
2126
def lock_write(self, token=None):
2127
# All-in-one needs to always unlock/lock.
2128
repo_control = getattr(self.repository, 'control_files', None)
2129
if self.control_files == repo_control or not self.is_locked():
2130
self.repository.lock_write()
2135
return self.control_files.lock_write(token=token)
2138
self.repository.unlock()
2141
def lock_read(self):
2142
# All-in-one needs to always unlock/lock.
2143
repo_control = getattr(self.repository, 'control_files', None)
2144
if self.control_files == repo_control or not self.is_locked():
2145
self.repository.lock_read()
2150
self.control_files.lock_read()
2153
self.repository.unlock()
2158
self.control_files.unlock()
2160
# All-in-one needs to always unlock/lock.
2161
repo_control = getattr(self.repository, 'control_files', None)
2162
if (self.control_files == repo_control or
2163
not self.control_files.is_locked()):
2164
self.repository.unlock()
2165
if not self.control_files.is_locked():
2166
# we just released the lock
2167
self._clear_cached_state()
2169
def peek_lock_mode(self):
2170
if self.control_files._lock_count == 0:
2173
return self.control_files._lock_mode
2175
def get_physical_lock_status(self):
2176
return self.control_files.get_physical_lock_status()
2179
def print_file(self, file, revision_id):
2180
"""See Branch.print_file."""
2181
return self.repository.print_file(file, revision_id)
2183
def _write_revision_history(self, history):
2184
"""Factored out of set_revision_history.
2186
This performs the actual writing to disk.
2187
It is intended to be called by BzrBranch5.set_revision_history."""
2188
self._transport.put_bytes(
2189
'revision-history', '\n'.join(history),
2190
mode=self.bzrdir._get_file_mode())
2193
def set_revision_history(self, rev_history):
2194
"""See Branch.set_revision_history."""
2195
if 'evil' in debug.debug_flags:
2196
mutter_callsite(3, "set_revision_history scales with history.")
2197
check_not_reserved_id = _mod_revision.check_not_reserved_id
2198
for rev_id in rev_history:
2199
check_not_reserved_id(rev_id)
2200
if Branch.hooks['post_change_branch_tip']:
2201
# Don't calculate the last_revision_info() if there are no hooks
2203
old_revno, old_revid = self.last_revision_info()
2204
if len(rev_history) == 0:
2205
revid = _mod_revision.NULL_REVISION
2207
revid = rev_history[-1]
2208
self._run_pre_change_branch_tip_hooks(len(rev_history), revid)
2209
self._write_revision_history(rev_history)
2210
self._clear_cached_state()
2211
self._cache_revision_history(rev_history)
2212
for hook in Branch.hooks['set_rh']:
2213
hook(self, rev_history)
2214
if Branch.hooks['post_change_branch_tip']:
2215
self._run_post_change_branch_tip_hooks(old_revno, old_revid)
2217
def _synchronize_history(self, destination, revision_id):
2218
"""Synchronize last revision and revision history between branches.
2220
This version is most efficient when the destination is also a
2221
BzrBranch5, but works for BzrBranch6 as long as the revision
2222
history is the true lefthand parent history, and all of the revisions
2223
are in the destination's repository. If not, set_revision_history
2226
:param destination: The branch to copy the history into
2227
:param revision_id: The revision-id to truncate history at. May
2228
be None to copy complete history.
2230
if not isinstance(destination._format, BzrBranchFormat5):
2231
super(BzrBranch, self)._synchronize_history(
2232
destination, revision_id)
2234
if revision_id == _mod_revision.NULL_REVISION:
2237
new_history = self.revision_history()
2238
if revision_id is not None and new_history != []:
2240
new_history = new_history[:new_history.index(revision_id) + 1]
2242
rev = self.repository.get_revision(revision_id)
2243
new_history = rev.get_history(self.repository)[1:]
2244
destination.set_revision_history(new_history)
2247
def set_last_revision_info(self, revno, revision_id):
2248
"""Set the last revision of this branch.
2250
The caller is responsible for checking that the revno is correct
2251
for this revision id.
2253
It may be possible to set the branch last revision to an id not
2254
present in the repository. However, branches can also be
2255
configured to check constraints on history, in which case this may not
2258
revision_id = _mod_revision.ensure_null(revision_id)
2259
# this old format stores the full history, but this api doesn't
2260
# provide it, so we must generate, and might as well check it's
2262
history = self._lefthand_history(revision_id)
2263
if len(history) != revno:
2264
raise AssertionError('%d != %d' % (len(history), revno))
2265
self.set_revision_history(history)
2267
def _gen_revision_history(self):
2268
history = self._transport.get_bytes('revision-history').split('\n')
2269
if history[-1:] == ['']:
2270
# There shouldn't be a trailing newline, but just in case.
2275
def generate_revision_history(self, revision_id, last_rev=None,
2277
"""Create a new revision history that will finish with revision_id.
2279
:param revision_id: the new tip to use.
2280
:param last_rev: The previous last_revision. If not None, then this
2281
must be a ancestory of revision_id, or DivergedBranches is raised.
2282
:param other_branch: The other branch that DivergedBranches should
2283
raise with respect to.
2285
self.set_revision_history(self._lefthand_history(revision_id,
2286
last_rev, other_branch))
2288
def basis_tree(self):
2289
"""See Branch.basis_tree."""
2290
return self.repository.revision_tree(self.last_revision())
2292
def _get_parent_location(self):
2293
_locs = ['parent', 'pull', 'x-pull']
2296
return self._transport.get_bytes(l).strip('\n')
2297
except errors.NoSuchFile:
2301
def _basic_push(self, target, overwrite, stop_revision):
2302
"""Basic implementation of push without bound branches or hooks.
2304
Must be called with source read locked and target write locked.
2306
result = BranchPushResult()
2307
result.source_branch = self
2308
result.target_branch = target
2309
result.old_revno, result.old_revid = target.last_revision_info()
2310
self.update_references(target)
2311
if result.old_revid != self.last_revision():
2312
# We assume that during 'push' this repository is closer than
2314
graph = self.repository.get_graph(target.repository)
2315
target.update_revisions(self, stop_revision,
2316
overwrite=overwrite, graph=graph)
2317
if self._push_should_merge_tags():
2318
result.tag_conflicts = self.tags.merge_to(target.tags,
2320
result.new_revno, result.new_revid = target.last_revision_info()
2323
def get_stacked_on_url(self):
2324
raise errors.UnstackableBranchFormat(self._format, self.base)
2326
def set_push_location(self, location):
2327
"""See Branch.set_push_location."""
2328
self.get_config().set_user_option(
2329
'push_location', location,
2330
store=_mod_config.STORE_LOCATION_NORECURSE)
2332
def _set_parent_location(self, url):
2334
self._transport.delete('parent')
2336
self._transport.put_bytes('parent', url + '\n',
2337
mode=self.bzrdir._get_file_mode())
2340
class BzrBranch5(BzrBranch):
2341
"""A format 5 branch. This supports new features over plain branches.
2343
It has support for a master_branch which is the data for bound branches.
2346
def get_bound_location(self):
2348
return self._transport.get_bytes('bound')[:-1]
2349
except errors.NoSuchFile:
2353
def get_master_branch(self, possible_transports=None):
2354
"""Return the branch we are bound to.
2356
:return: Either a Branch, or None
2358
This could memoise the branch, but if thats done
2359
it must be revalidated on each new lock.
2360
So for now we just don't memoise it.
2361
# RBC 20060304 review this decision.
2363
bound_loc = self.get_bound_location()
2367
return Branch.open(bound_loc,
2368
possible_transports=possible_transports)
2369
except (errors.NotBranchError, errors.ConnectionError), e:
2370
raise errors.BoundBranchConnectionFailure(
2374
def set_bound_location(self, location):
2375
"""Set the target where this branch is bound to.
2377
:param location: URL to the target branch
2380
self._transport.put_bytes('bound', location+'\n',
2381
mode=self.bzrdir._get_file_mode())
2384
self._transport.delete('bound')
2385
except errors.NoSuchFile:
2390
def bind(self, other):
2391
"""Bind this branch to the branch other.
2393
This does not push or pull data between the branches, though it does
2394
check for divergence to raise an error when the branches are not
2395
either the same, or one a prefix of the other. That behaviour may not
2396
be useful, so that check may be removed in future.
2398
:param other: The branch to bind to
2401
# TODO: jam 20051230 Consider checking if the target is bound
2402
# It is debatable whether you should be able to bind to
2403
# a branch which is itself bound.
2404
# Committing is obviously forbidden,
2405
# but binding itself may not be.
2406
# Since we *have* to check at commit time, we don't
2407
# *need* to check here
2409
# we want to raise diverged if:
2410
# last_rev is not in the other_last_rev history, AND
2411
# other_last_rev is not in our history, and do it without pulling
2413
self.set_bound_location(other.base)
2417
"""If bound, unbind"""
2418
return self.set_bound_location(None)
2421
def update(self, possible_transports=None):
2422
"""Synchronise this branch with the master branch if any.
2424
:return: None or the last_revision that was pivoted out during the
2427
master = self.get_master_branch(possible_transports)
2428
if master is not None:
2429
old_tip = _mod_revision.ensure_null(self.last_revision())
2430
self.pull(master, overwrite=True)
2431
if self.repository.get_graph().is_ancestor(old_tip,
2432
_mod_revision.ensure_null(self.last_revision())):
2438
class BzrBranch8(BzrBranch5):
2439
"""A branch that stores tree-reference locations."""
2441
def _open_hook(self):
2442
if self._ignore_fallbacks:
2445
url = self.get_stacked_on_url()
2446
except (errors.UnstackableRepositoryFormat, errors.NotStacked,
2447
errors.UnstackableBranchFormat):
2450
for hook in Branch.hooks['transform_fallback_location']:
2451
url = hook(self, url)
2453
hook_name = Branch.hooks.get_hook_name(hook)
2454
raise AssertionError(
2455
"'transform_fallback_location' hook %s returned "
2456
"None, not a URL." % hook_name)
2457
self._activate_fallback_location(url)
2459
def __init__(self, *args, **kwargs):
2460
self._ignore_fallbacks = kwargs.get('ignore_fallbacks', False)
2461
super(BzrBranch8, self).__init__(*args, **kwargs)
2462
self._last_revision_info_cache = None
2463
self._reference_info = None
2465
def _clear_cached_state(self):
2466
super(BzrBranch8, self)._clear_cached_state()
2467
self._last_revision_info_cache = None
2468
self._reference_info = None
2470
def _last_revision_info(self):
2471
revision_string = self._transport.get_bytes('last-revision')
2472
revno, revision_id = revision_string.rstrip('\n').split(' ', 1)
2473
revision_id = cache_utf8.get_cached_utf8(revision_id)
2475
return revno, revision_id
2477
def _write_last_revision_info(self, revno, revision_id):
2478
"""Simply write out the revision id, with no checks.
2480
Use set_last_revision_info to perform this safely.
2482
Does not update the revision_history cache.
2483
Intended to be called by set_last_revision_info and
2484
_write_revision_history.
2486
revision_id = _mod_revision.ensure_null(revision_id)
2487
out_string = '%d %s\n' % (revno, revision_id)
2488
self._transport.put_bytes('last-revision', out_string,
2489
mode=self.bzrdir._get_file_mode())
2492
def set_last_revision_info(self, revno, revision_id):
2493
revision_id = _mod_revision.ensure_null(revision_id)
2494
old_revno, old_revid = self.last_revision_info()
2495
if self._get_append_revisions_only():
2496
self._check_history_violation(revision_id)
2497
self._run_pre_change_branch_tip_hooks(revno, revision_id)
2498
self._write_last_revision_info(revno, revision_id)
2499
self._clear_cached_state()
2500
self._last_revision_info_cache = revno, revision_id
2501
self._run_post_change_branch_tip_hooks(old_revno, old_revid)
2503
def _synchronize_history(self, destination, revision_id):
2504
"""Synchronize last revision and revision history between branches.
2506
:see: Branch._synchronize_history
2508
# XXX: The base Branch has a fast implementation of this method based
2509
# on set_last_revision_info, but BzrBranch/BzrBranch5 have a slower one
2510
# that uses set_revision_history. This class inherits from BzrBranch5,
2511
# but wants the fast implementation, so it calls
2512
# Branch._synchronize_history directly.
2513
Branch._synchronize_history(self, destination, revision_id)
2515
def _check_history_violation(self, revision_id):
2516
last_revision = _mod_revision.ensure_null(self.last_revision())
2517
if _mod_revision.is_null(last_revision):
2519
if last_revision not in self._lefthand_history(revision_id):
2520
raise errors.AppendRevisionsOnlyViolation(self.base)
2522
def _gen_revision_history(self):
2523
"""Generate the revision history from last revision
2525
last_revno, last_revision = self.last_revision_info()
2526
self._extend_partial_history(stop_index=last_revno-1)
2527
return list(reversed(self._partial_revision_history_cache))
2529
def _write_revision_history(self, history):
2530
"""Factored out of set_revision_history.
2532
This performs the actual writing to disk, with format-specific checks.
2533
It is intended to be called by BzrBranch5.set_revision_history.
2535
if len(history) == 0:
2536
last_revision = 'null:'
2538
if history != self._lefthand_history(history[-1]):
2539
raise errors.NotLefthandHistory(history)
2540
last_revision = history[-1]
2541
if self._get_append_revisions_only():
2542
self._check_history_violation(last_revision)
2543
self._write_last_revision_info(len(history), last_revision)
2546
def _set_parent_location(self, url):
2547
"""Set the parent branch"""
2548
self._set_config_location('parent_location', url, make_relative=True)
2551
def _get_parent_location(self):
2552
"""Set the parent branch"""
2553
return self._get_config_location('parent_location')
2556
def _set_all_reference_info(self, info_dict):
2557
"""Replace all reference info stored in a branch.
2559
:param info_dict: A dict of {file_id: (tree_path, branch_location)}
2562
writer = rio.RioWriter(s)
2563
for key, (tree_path, branch_location) in info_dict.iteritems():
2564
stanza = rio.Stanza(file_id=key, tree_path=tree_path,
2565
branch_location=branch_location)
2566
writer.write_stanza(stanza)
2567
self._transport.put_bytes('references', s.getvalue())
2568
self._reference_info = info_dict
2571
def _get_all_reference_info(self):
2572
"""Return all the reference info stored in a branch.
2574
:return: A dict of {file_id: (tree_path, branch_location)}
2576
if self._reference_info is not None:
2577
return self._reference_info
2578
rio_file = self._transport.get('references')
2580
stanzas = rio.read_stanzas(rio_file)
2581
info_dict = dict((s['file_id'], (s['tree_path'],
2582
s['branch_location'])) for s in stanzas)
2585
self._reference_info = info_dict
2588
def set_reference_info(self, file_id, tree_path, branch_location):
2589
"""Set the branch location to use for a tree reference.
2591
:param file_id: The file-id of the tree reference.
2592
:param tree_path: The path of the tree reference in the tree.
2593
:param branch_location: The location of the branch to retrieve tree
2596
info_dict = self._get_all_reference_info()
2597
info_dict[file_id] = (tree_path, branch_location)
2598
if None in (tree_path, branch_location):
2599
if tree_path is not None:
2600
raise ValueError('tree_path must be None when branch_location'
2602
if branch_location is not None:
2603
raise ValueError('branch_location must be None when tree_path'
2605
del info_dict[file_id]
2606
self._set_all_reference_info(info_dict)
2608
def get_reference_info(self, file_id):
2609
"""Get the tree_path and branch_location for a tree reference.
2611
:return: a tuple of (tree_path, branch_location)
2613
return self._get_all_reference_info().get(file_id, (None, None))
2615
def reference_parent(self, file_id, path, possible_transports=None):
2616
"""Return the parent branch for a tree-reference file_id.
2618
:param file_id: The file_id of the tree reference
2619
:param path: The path of the file_id in the tree
2620
:return: A branch associated with the file_id
2622
branch_location = self.get_reference_info(file_id)[1]
2623
if branch_location is None:
2624
return Branch.reference_parent(self, file_id, path,
2625
possible_transports)
2626
branch_location = urlutils.join(self.base, branch_location)
2627
return Branch.open(branch_location,
2628
possible_transports=possible_transports)
2630
def set_push_location(self, location):
2631
"""See Branch.set_push_location."""
2632
self._set_config_location('push_location', location)
2634
def set_bound_location(self, location):
2635
"""See Branch.set_push_location."""
2637
config = self.get_config()
2638
if location is None:
2639
if config.get_user_option('bound') != 'True':
2642
config.set_user_option('bound', 'False', warn_masked=True)
2645
self._set_config_location('bound_location', location,
2647
config.set_user_option('bound', 'True', warn_masked=True)
2650
def _get_bound_location(self, bound):
2651
"""Return the bound location in the config file.
2653
Return None if the bound parameter does not match"""
2654
config = self.get_config()
2655
config_bound = (config.get_user_option('bound') == 'True')
2656
if config_bound != bound:
2658
return self._get_config_location('bound_location', config=config)
2660
def get_bound_location(self):
2661
"""See Branch.set_push_location."""
2662
return self._get_bound_location(True)
2664
def get_old_bound_location(self):
2665
"""See Branch.get_old_bound_location"""
2666
return self._get_bound_location(False)
2668
def get_stacked_on_url(self):
2669
# you can always ask for the URL; but you might not be able to use it
2670
# if the repo can't support stacking.
2671
## self._check_stackable_repo()
2672
stacked_url = self._get_config_location('stacked_on_location')
2673
if stacked_url is None:
2674
raise errors.NotStacked(self)
2677
def _get_append_revisions_only(self):
2678
value = self.get_config().get_user_option('append_revisions_only')
2679
return value == 'True'
2682
def generate_revision_history(self, revision_id, last_rev=None,
2684
"""See BzrBranch5.generate_revision_history"""
2685
history = self._lefthand_history(revision_id, last_rev, other_branch)
2686
revno = len(history)
2687
self.set_last_revision_info(revno, revision_id)
2690
def get_rev_id(self, revno, history=None):
2691
"""Find the revision id of the specified revno."""
2693
return _mod_revision.NULL_REVISION
2695
last_revno, last_revision_id = self.last_revision_info()
2696
if revno <= 0 or revno > last_revno:
2697
raise errors.NoSuchRevision(self, revno)
2699
if history is not None:
2700
return history[revno - 1]
2702
index = last_revno - revno
2703
if len(self._partial_revision_history_cache) <= index:
2704
self._extend_partial_history(stop_index=index)
2705
if len(self._partial_revision_history_cache) > index:
2706
return self._partial_revision_history_cache[index]
2708
raise errors.NoSuchRevision(self, revno)
2711
def revision_id_to_revno(self, revision_id):
2712
"""Given a revision id, return its revno"""
2713
if _mod_revision.is_null(revision_id):
2716
index = self._partial_revision_history_cache.index(revision_id)
2718
self._extend_partial_history(stop_revision=revision_id)
2719
index = len(self._partial_revision_history_cache) - 1
2720
if self._partial_revision_history_cache[index] != revision_id:
2721
raise errors.NoSuchRevision(self, revision_id)
2722
return self.revno() - index
2725
class BzrBranch7(BzrBranch8):
2726
"""A branch with support for a fallback repository."""
2728
def set_reference_info(self, file_id, tree_path, branch_location):
2729
Branch.set_reference_info(self, file_id, tree_path, branch_location)
2731
def get_reference_info(self, file_id):
2732
Branch.get_reference_info(self, file_id)
2734
def reference_parent(self, file_id, path, possible_transports=None):
2735
return Branch.reference_parent(self, file_id, path,
2736
possible_transports)
2739
class BzrBranch6(BzrBranch7):
2740
"""See BzrBranchFormat6 for the capabilities of this branch.
2742
This subclass of BzrBranch7 disables the new features BzrBranch7 added,
2746
def get_stacked_on_url(self):
2747
raise errors.UnstackableBranchFormat(self._format, self.base)
2750
######################################################################
2751
# results of operations
2754
class _Result(object):
2756
def _show_tag_conficts(self, to_file):
2757
if not getattr(self, 'tag_conflicts', None):
2759
to_file.write('Conflicting tags:\n')
2760
for name, value1, value2 in self.tag_conflicts:
2761
to_file.write(' %s\n' % (name, ))
2764
class PullResult(_Result):
2765
"""Result of a Branch.pull operation.
2767
:ivar old_revno: Revision number before pull.
2768
:ivar new_revno: Revision number after pull.
2769
:ivar old_revid: Tip revision id before pull.
2770
:ivar new_revid: Tip revision id after pull.
2771
:ivar source_branch: Source (local) branch object. (read locked)
2772
:ivar master_branch: Master branch of the target, or the target if no
2774
:ivar local_branch: target branch if there is a Master, else None
2775
:ivar target_branch: Target/destination branch object. (write locked)
2776
:ivar tag_conflicts: A list of tag conflicts, see BasicTags.merge_to
2780
# DEPRECATED: pull used to return the change in revno
2781
return self.new_revno - self.old_revno
2783
def report(self, to_file):
2785
if self.old_revid == self.new_revid:
2786
to_file.write('No revisions to pull.\n')
2788
to_file.write('Now on revision %d.\n' % self.new_revno)
2789
self._show_tag_conficts(to_file)
2792
class BranchPushResult(_Result):
2793
"""Result of a Branch.push operation.
2795
:ivar old_revno: Revision number (eg 10) of the target before push.
2796
:ivar new_revno: Revision number (eg 12) of the target after push.
2797
:ivar old_revid: Tip revision id (eg joe@foo.com-1234234-aoeua34) of target
2799
:ivar new_revid: Tip revision id (eg joe@foo.com-5676566-boa234a) of target
2801
:ivar source_branch: Source branch object that the push was from. This is
2802
read locked, and generally is a local (and thus low latency) branch.
2803
:ivar master_branch: If target is a bound branch, the master branch of
2804
target, or target itself. Always write locked.
2805
:ivar target_branch: The direct Branch where data is being sent (write
2807
:ivar local_branch: If the target is a bound branch this will be the
2808
target, otherwise it will be None.
2812
# DEPRECATED: push used to return the change in revno
2813
return self.new_revno - self.old_revno
2815
def report(self, to_file):
2816
"""Write a human-readable description of the result."""
2817
if self.old_revid == self.new_revid:
2818
note('No new revisions to push.')
2820
note('Pushed up to revision %d.' % self.new_revno)
2821
self._show_tag_conficts(to_file)
2824
class BranchCheckResult(object):
2825
"""Results of checking branch consistency.
2830
def __init__(self, branch):
2831
self.branch = branch
2834
def report_results(self, verbose):
2835
"""Report the check results via trace.note.
2837
:param verbose: Requests more detailed display of what was checked,
2840
note('checked branch %s format %s', self.branch.base,
2841
self.branch._format)
2842
for error in self.errors:
2843
note('found error:%s', error)
2846
class Converter5to6(object):
2847
"""Perform an in-place upgrade of format 5 to format 6"""
2849
def convert(self, branch):
2850
# Data for 5 and 6 can peacefully coexist.
2851
format = BzrBranchFormat6()
2852
new_branch = format.open(branch.bzrdir, _found=True)
2854
# Copy source data into target
2855
new_branch._write_last_revision_info(*branch.last_revision_info())
2856
new_branch.set_parent(branch.get_parent())
2857
new_branch.set_bound_location(branch.get_bound_location())
2858
new_branch.set_push_location(branch.get_push_location())
2860
# New branch has no tags by default
2861
new_branch.tags._set_tag_dict({})
2863
# Copying done; now update target format
2864
new_branch._transport.put_bytes('format',
2865
format.get_format_string(),
2866
mode=new_branch.bzrdir._get_file_mode())
2868
# Clean up old files
2869
new_branch._transport.delete('revision-history')
2871
branch.set_parent(None)
2872
except errors.NoSuchFile:
2874
branch.set_bound_location(None)
2877
class Converter6to7(object):
2878
"""Perform an in-place upgrade of format 6 to format 7"""
2880
def convert(self, branch):
2881
format = BzrBranchFormat7()
2882
branch._set_config_location('stacked_on_location', '')
2883
# update target format
2884
branch._transport.put_bytes('format', format.get_format_string())
2887
class Converter7to8(object):
2888
"""Perform an in-place upgrade of format 6 to format 7"""
2890
def convert(self, branch):
2891
format = BzrBranchFormat8()
2892
branch._transport.put_bytes('references', '')
2893
# update target format
2894
branch._transport.put_bytes('format', format.get_format_string())
2897
def _run_with_write_locked_target(target, callable, *args, **kwargs):
2898
"""Run ``callable(*args, **kwargs)``, write-locking target for the
2901
_run_with_write_locked_target will attempt to release the lock it acquires.
2903
If an exception is raised by callable, then that exception *will* be
2904
propagated, even if the unlock attempt raises its own error. Thus
2905
_run_with_write_locked_target should be preferred to simply doing::
2909
return callable(*args, **kwargs)
2914
# This is very similar to bzrlib.decorators.needs_write_lock. Perhaps they
2915
# should share code?
2918
result = callable(*args, **kwargs)
2920
exc_info = sys.exc_info()
2924
raise exc_info[0], exc_info[1], exc_info[2]
2930
class InterBranch(InterObject):
2931
"""This class represents operations taking place between two branches.
2933
Its instances have methods like pull() and push() and contain
2934
references to the source and target repositories these operations
2935
can be carried out on.
2939
"""The available optimised InterBranch types."""
2942
def _get_branch_formats_to_test():
2943
"""Return a tuple with the Branch formats to use when testing."""
2944
raise NotImplementedError(InterBranch._get_branch_formats_to_test)
2946
def pull(self, overwrite=False, stop_revision=None,
2947
possible_transports=None, local=False):
2948
"""Mirror source into target branch.
2950
The target branch is considered to be 'local', having low latency.
2952
:returns: PullResult instance
2954
raise NotImplementedError(self.pull)
2956
def update_revisions(self, stop_revision=None, overwrite=False,
2958
"""Pull in new perfect-fit revisions.
2960
:param stop_revision: Updated until the given revision
2961
:param overwrite: Always set the branch pointer, rather than checking
2962
to see if it is a proper descendant.
2963
:param graph: A Graph object that can be used to query history
2964
information. This can be None.
2967
raise NotImplementedError(self.update_revisions)
2969
def push(self, overwrite=False, stop_revision=None,
2970
_override_hook_source_branch=None):
2971
"""Mirror the source branch into the target branch.
2973
The source branch is considered to be 'local', having low latency.
2975
raise NotImplementedError(self.push)
2978
class GenericInterBranch(InterBranch):
2979
"""InterBranch implementation that uses public Branch functions.
2983
def _get_branch_formats_to_test():
2984
return BranchFormat._default_format, BranchFormat._default_format
2986
def update_revisions(self, stop_revision=None, overwrite=False,
2988
"""See InterBranch.update_revisions()."""
2989
self.source.lock_read()
2991
other_revno, other_last_revision = self.source.last_revision_info()
2992
stop_revno = None # unknown
2993
if stop_revision is None:
2994
stop_revision = other_last_revision
2995
if _mod_revision.is_null(stop_revision):
2996
# if there are no commits, we're done.
2998
stop_revno = other_revno
3000
# what's the current last revision, before we fetch [and change it
3002
last_rev = _mod_revision.ensure_null(self.target.last_revision())
3003
# we fetch here so that we don't process data twice in the common
3004
# case of having something to pull, and so that the check for
3005
# already merged can operate on the just fetched graph, which will
3006
# be cached in memory.
3007
self.target.fetch(self.source, stop_revision)
3008
# Check to see if one is an ancestor of the other
3011
graph = self.target.repository.get_graph()
3012
if self.target._check_if_descendant_or_diverged(
3013
stop_revision, last_rev, graph, self.source):
3014
# stop_revision is a descendant of last_rev, but we aren't
3015
# overwriting, so we're done.
3017
if stop_revno is None:
3019
graph = self.target.repository.get_graph()
3020
this_revno, this_last_revision = \
3021
self.target.last_revision_info()
3022
stop_revno = graph.find_distance_to_null(stop_revision,
3023
[(other_last_revision, other_revno),
3024
(this_last_revision, this_revno)])
3025
self.target.set_last_revision_info(stop_revno, stop_revision)
3027
self.source.unlock()
3029
def pull(self, overwrite=False, stop_revision=None,
3030
possible_transports=None, _hook_master=None, run_hooks=True,
3031
_override_hook_target=None, local=False):
3034
:param _hook_master: Private parameter - set the branch to
3035
be supplied as the master to pull hooks.
3036
:param run_hooks: Private parameter - if false, this branch
3037
is being called because it's the master of the primary branch,
3038
so it should not run its hooks.
3039
:param _override_hook_target: Private parameter - set the branch to be
3040
supplied as the target_branch to pull hooks.
3041
:param local: Only update the local branch, and not the bound branch.
3043
# This type of branch can't be bound.
3045
raise errors.LocalRequiresBoundBranch()
3046
result = PullResult()
3047
result.source_branch = self.source
3048
if _override_hook_target is None:
3049
result.target_branch = self.target
3051
result.target_branch = _override_hook_target
3052
self.source.lock_read()
3054
# We assume that during 'pull' the target repository is closer than
3056
self.source.update_references(self.target)
3057
graph = self.target.repository.get_graph(self.source.repository)
3058
# TODO: Branch formats should have a flag that indicates
3059
# that revno's are expensive, and pull() should honor that flag.
3061
result.old_revno, result.old_revid = \
3062
self.target.last_revision_info()
3063
self.target.update_revisions(self.source, stop_revision,
3064
overwrite=overwrite, graph=graph)
3065
# TODO: The old revid should be specified when merging tags,
3066
# so a tags implementation that versions tags can only
3067
# pull in the most recent changes. -- JRV20090506
3068
result.tag_conflicts = self.source.tags.merge_to(self.target.tags,
3070
result.new_revno, result.new_revid = self.target.last_revision_info()
3072
result.master_branch = _hook_master
3073
result.local_branch = result.target_branch
3075
result.master_branch = result.target_branch
3076
result.local_branch = None
3078
for hook in Branch.hooks['post_pull']:
3081
self.source.unlock()
3084
def push(self, overwrite=False, stop_revision=None,
3085
_override_hook_source_branch=None):
3086
"""See InterBranch.push.
3088
This is the basic concrete implementation of push()
3090
:param _override_hook_source_branch: If specified, run
3091
the hooks passing this Branch as the source, rather than self.
3092
This is for use of RemoteBranch, where push is delegated to the
3093
underlying vfs-based Branch.
3095
# TODO: Public option to disable running hooks - should be trivial but
3097
self.source.lock_read()
3099
return _run_with_write_locked_target(
3100
self.target, self._push_with_bound_branches, overwrite,
3102
_override_hook_source_branch=_override_hook_source_branch)
3104
self.source.unlock()
3106
def _push_with_bound_branches(self, overwrite, stop_revision,
3107
_override_hook_source_branch=None):
3108
"""Push from source into target, and into target's master if any.
3111
if _override_hook_source_branch:
3112
result.source_branch = _override_hook_source_branch
3113
for hook in Branch.hooks['post_push']:
3116
bound_location = self.target.get_bound_location()
3117
if bound_location and self.target.base != bound_location:
3118
# there is a master branch.
3120
# XXX: Why the second check? Is it even supported for a branch to
3121
# be bound to itself? -- mbp 20070507
3122
master_branch = self.target.get_master_branch()
3123
master_branch.lock_write()
3125
# push into the master from the source branch.
3126
self.source._basic_push(master_branch, overwrite, stop_revision)
3127
# and push into the target branch from the source. Note that we
3128
# push from the source branch again, because its considered the
3129
# highest bandwidth repository.
3130
result = self.source._basic_push(self.target, overwrite,
3132
result.master_branch = master_branch
3133
result.local_branch = self.target
3137
master_branch.unlock()
3140
result = self.source._basic_push(self.target, overwrite,
3142
# TODO: Why set master_branch and local_branch if there's no
3143
# binding? Maybe cleaner to just leave them unset? -- mbp
3145
result.master_branch = self.target
3146
result.local_branch = None
3151
def is_compatible(self, source, target):
3152
# GenericBranch uses the public API, so always compatible
3156
class InterToBranch5(GenericInterBranch):
3159
def _get_branch_formats_to_test():
3160
return BranchFormat._default_format, BzrBranchFormat5()
3162
def pull(self, overwrite=False, stop_revision=None,
3163
possible_transports=None, run_hooks=True,
3164
_override_hook_target=None, local=False):
3165
"""Pull from source into self, updating my master if any.
3167
:param run_hooks: Private parameter - if false, this branch
3168
is being called because it's the master of the primary branch,
3169
so it should not run its hooks.
3171
bound_location = self.target.get_bound_location()
3172
if local and not bound_location:
3173
raise errors.LocalRequiresBoundBranch()
3174
master_branch = None
3175
if not local and bound_location and self.source.base != bound_location:
3176
# not pulling from master, so we need to update master.
3177
master_branch = self.target.get_master_branch(possible_transports)
3178
master_branch.lock_write()
3181
# pull from source into master.
3182
master_branch.pull(self.source, overwrite, stop_revision,
3184
return super(InterToBranch5, self).pull(overwrite,
3185
stop_revision, _hook_master=master_branch,
3186
run_hooks=run_hooks,
3187
_override_hook_target=_override_hook_target)
3190
master_branch.unlock()
3193
InterBranch.register_optimiser(GenericInterBranch)
3194
InterBranch.register_optimiser(InterToBranch5)
added
removed
bzrlib/branch.py
