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# Copyright (C) 2005-2010 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, only_raises
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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.lock import _RelockDebugMixin
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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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class Branch(bzrdir.ControlComponent):
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"""Branch holding a history of revisions.
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Base directory/url of the branch; using control_url and
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control_transport is more standardized.
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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 control_transport(self):
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return self._transport
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def user_transport(self):
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return self.bzrdir.user_transport
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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.user_url, 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=_unsupported)
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def open_from_transport(transport, name=None, _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(name=name, unsupported=_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_branch = Branch.open(url,
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possible_transports=[self.bzrdir.root_transport])
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return a_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, token=None):
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"""Lock the branch for write operations.
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:param token: A token to permit reacquiring a previously held and
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:return: A BranchWriteLockResult.
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raise NotImplementedError(self.lock_write)
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"""Lock the branch for read operations.
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:return: An object with an unlock method which will release the lock
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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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* 'with-merges-without-common-ancestry' - filter out revisions
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that are in both ancestries
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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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known_graph = self.repository.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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# Make sure we don't return revisions that are not part of the
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# start_revision_id ancestry.
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filtered = self._filter_start_non_ancestors(filtered)
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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-without-common-ancestry':
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# We want to exclude all revisions that are already part of the
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# stop_revision_id ancestry.
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graph = self.repository.get_graph()
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ancestors = graph.find_unique_ancestors(start_revision_id,
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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 not in ancestors:
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yield (rev_id, node.merge_depth, node.revno,
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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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# left_parent is the actual revision we want to stop logging at,
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# since we want to show the merged revisions after the stop_rev too
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reached_stop_revision_id = False
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revision_id_whitelist = []
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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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# reached the left parent after the stop_revision
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if (not reached_stop_revision_id or
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rev_id in revision_id_whitelist):
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yield (rev_id, node.merge_depth, node.revno,
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if reached_stop_revision_id or rev_id == stop_revision_id:
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# only do the merged revs of rev_id from now on
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rev = self.repository.get_revision(rev_id)
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reached_stop_revision_id = True
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revision_id_whitelist.extend(rev.parent_ids)
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raise ValueError('invalid stop_rule %r' % stop_rule)
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def _filter_start_non_ancestors(self, rev_iter):
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# If we started from a dotted revno, we want to consider it as a tip
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# and don't want to yield revisions that are not part of its
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# ancestry. Given the order guaranteed by the merge sort, we will see
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# uninteresting descendants of the first parent of our tip before the
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first = rev_iter.next()
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(rev_id, merge_depth, revno, end_of_merge) = first
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# We start at a mainline revision so by definition, all others
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# revisions in rev_iter are ancestors
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for node in rev_iter:
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pmap = self.repository.get_parent_map([rev_id])
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parents = pmap.get(rev_id, [])
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whitelist.update(parents)
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# If there is no parents, there is nothing of interest left
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# FIXME: It's hard to test this scenario here as this code is never
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# called in that case. -- vila 20100322
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for (rev_id, merge_depth, revno, end_of_merge) in rev_iter:
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if rev_id in whitelist:
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pmap = self.repository.get_parent_map([rev_id])
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parents = pmap.get(rev_id, [])
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whitelist.remove(rev_id)
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whitelist.update(parents)
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# We've reached the mainline, there is nothing left to
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# A revision that is not part of the ancestry of our
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yield (rev_id, merge_depth, revno, end_of_merge)
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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.user_url)
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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.user_url)
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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.user_url)
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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.
702
:return: Either a Branch, or None
706
def get_revision_delta(self, revno):
707
"""Return the delta for one revision.
709
The delta is relative to its mainline predecessor, or the
710
empty tree for revision 1.
712
rh = self.revision_history()
713
if not (1 <= revno <= len(rh)):
714
raise errors.InvalidRevisionNumber(revno)
715
return self.repository.get_revision_delta(rh[revno-1])
717
def get_stacked_on_url(self):
718
"""Get the URL this branch is stacked against.
720
:raises NotStacked: If the branch is not stacked.
721
:raises UnstackableBranchFormat: If the branch does not support
724
raise NotImplementedError(self.get_stacked_on_url)
726
def print_file(self, file, revision_id):
727
"""Print `file` to stdout."""
728
raise NotImplementedError(self.print_file)
730
def set_revision_history(self, rev_history):
731
raise NotImplementedError(self.set_revision_history)
734
def set_parent(self, url):
735
"""See Branch.set_parent."""
736
# TODO: Maybe delete old location files?
737
# URLs should never be unicode, even on the local fs,
738
# FIXUP this and get_parent in a future branch format bump:
739
# read and rewrite the file. RBC 20060125
741
if isinstance(url, unicode):
743
url = url.encode('ascii')
744
except UnicodeEncodeError:
745
raise errors.InvalidURL(url,
746
"Urls must be 7-bit ascii, "
747
"use bzrlib.urlutils.escape")
748
url = urlutils.relative_url(self.base, url)
749
self._set_parent_location(url)
752
def set_stacked_on_url(self, url):
753
"""Set the URL this branch is stacked against.
755
:raises UnstackableBranchFormat: If the branch does not support
757
:raises UnstackableRepositoryFormat: If the repository does not support
760
if not self._format.supports_stacking():
761
raise errors.UnstackableBranchFormat(self._format, self.user_url)
762
# XXX: Changing from one fallback repository to another does not check
763
# that all the data you need is present in the new fallback.
764
# Possibly it should.
765
self._check_stackable_repo()
768
old_url = self.get_stacked_on_url()
769
except (errors.NotStacked, errors.UnstackableBranchFormat,
770
errors.UnstackableRepositoryFormat):
774
self._activate_fallback_location(url)
775
# write this out after the repository is stacked to avoid setting a
776
# stacked config that doesn't work.
777
self._set_config_location('stacked_on_location', url)
780
"""Change a branch to be unstacked, copying data as needed.
782
Don't call this directly, use set_stacked_on_url(None).
784
pb = ui.ui_factory.nested_progress_bar()
786
pb.update("Unstacking")
787
# The basic approach here is to fetch the tip of the branch,
788
# including all available ghosts, from the existing stacked
789
# repository into a new repository object without the fallbacks.
791
# XXX: See <https://launchpad.net/bugs/397286> - this may not be
792
# correct for CHKMap repostiories
793
old_repository = self.repository
794
if len(old_repository._fallback_repositories) != 1:
795
raise AssertionError("can't cope with fallback repositories "
796
"of %r" % (self.repository,))
797
# unlock it, including unlocking the fallback
798
old_repository.unlock()
799
old_repository.lock_read()
801
# Repositories don't offer an interface to remove fallback
802
# repositories today; take the conceptually simpler option and just
803
# reopen it. We reopen it starting from the URL so that we
804
# get a separate connection for RemoteRepositories and can
805
# stream from one of them to the other. This does mean doing
806
# separate SSH connection setup, but unstacking is not a
807
# common operation so it's tolerable.
808
new_bzrdir = bzrdir.BzrDir.open(self.bzrdir.root_transport.base)
809
new_repository = new_bzrdir.find_repository()
810
self.repository = new_repository
811
if self.repository._fallback_repositories:
812
raise AssertionError("didn't expect %r to have "
813
"fallback_repositories"
814
% (self.repository,))
815
# this is not paired with an unlock because it's just restoring
816
# the previous state; the lock's released when set_stacked_on_url
818
self.repository.lock_write()
819
# XXX: If you unstack a branch while it has a working tree
820
# with a pending merge, the pending-merged revisions will no
821
# longer be present. You can (probably) revert and remerge.
823
# XXX: This only fetches up to the tip of the repository; it
824
# doesn't bring across any tags. That's fairly consistent
825
# with how branch works, but perhaps not ideal.
826
self.repository.fetch(old_repository,
827
revision_id=self.last_revision(),
830
old_repository.unlock()
834
def _set_tags_bytes(self, bytes):
835
"""Mirror method for _get_tags_bytes.
837
:seealso: Branch._get_tags_bytes.
839
return _run_with_write_locked_target(self, self._transport.put_bytes,
842
def _cache_revision_history(self, rev_history):
843
"""Set the cached revision history to rev_history.
845
The revision_history method will use this cache to avoid regenerating
846
the revision history.
848
This API is semi-public; it only for use by subclasses, all other code
849
should consider it to be private.
851
self._revision_history_cache = rev_history
853
def _cache_revision_id_to_revno(self, revision_id_to_revno):
854
"""Set the cached revision_id => revno map to revision_id_to_revno.
856
This API is semi-public; it only for use by subclasses, all other code
857
should consider it to be private.
859
self._revision_id_to_revno_cache = revision_id_to_revno
861
def _clear_cached_state(self):
862
"""Clear any cached data on this branch, e.g. cached revision history.
864
This means the next call to revision_history will need to call
865
_gen_revision_history.
867
This API is semi-public; it only for use by subclasses, all other code
868
should consider it to be private.
870
self._revision_history_cache = None
871
self._revision_id_to_revno_cache = None
872
self._last_revision_info_cache = None
873
self._merge_sorted_revisions_cache = None
874
self._partial_revision_history_cache = []
875
self._partial_revision_id_to_revno_cache = {}
877
def _gen_revision_history(self):
878
"""Return sequence of revision hashes on to this branch.
880
Unlike revision_history, this method always regenerates or rereads the
881
revision history, i.e. it does not cache the result, so repeated calls
884
Concrete subclasses should override this instead of revision_history so
885
that subclasses do not need to deal with caching logic.
887
This API is semi-public; it only for use by subclasses, all other code
888
should consider it to be private.
890
raise NotImplementedError(self._gen_revision_history)
893
def revision_history(self):
894
"""Return sequence of revision ids on this branch.
896
This method will cache the revision history for as long as it is safe to
899
if 'evil' in debug.debug_flags:
900
mutter_callsite(3, "revision_history scales with history.")
901
if self._revision_history_cache is not None:
902
history = self._revision_history_cache
904
history = self._gen_revision_history()
905
self._cache_revision_history(history)
909
"""Return current revision number for this branch.
911
That is equivalent to the number of revisions committed to
914
return self.last_revision_info()[0]
917
"""Older format branches cannot bind or unbind."""
918
raise errors.UpgradeRequired(self.user_url)
920
def last_revision(self):
921
"""Return last revision id, or NULL_REVISION."""
922
return self.last_revision_info()[1]
925
def last_revision_info(self):
926
"""Return information about the last revision.
928
:return: A tuple (revno, revision_id).
930
if self._last_revision_info_cache is None:
931
self._last_revision_info_cache = self._last_revision_info()
932
return self._last_revision_info_cache
934
def _last_revision_info(self):
935
rh = self.revision_history()
938
return (revno, rh[-1])
940
return (0, _mod_revision.NULL_REVISION)
942
@deprecated_method(deprecated_in((1, 6, 0)))
943
def missing_revisions(self, other, stop_revision=None):
944
"""Return a list of new revisions that would perfectly fit.
946
If self and other have not diverged, return a list of the revisions
947
present in other, but missing from self.
949
self_history = self.revision_history()
950
self_len = len(self_history)
951
other_history = other.revision_history()
952
other_len = len(other_history)
953
common_index = min(self_len, other_len) -1
954
if common_index >= 0 and \
955
self_history[common_index] != other_history[common_index]:
956
raise errors.DivergedBranches(self, other)
958
if stop_revision is None:
959
stop_revision = other_len
961
if stop_revision > other_len:
962
raise errors.NoSuchRevision(self, stop_revision)
963
return other_history[self_len:stop_revision]
966
def update_revisions(self, other, stop_revision=None, overwrite=False,
968
"""Pull in new perfect-fit revisions.
970
:param other: Another Branch to pull from
971
:param stop_revision: Updated until the given revision
972
:param overwrite: Always set the branch pointer, rather than checking
973
to see if it is a proper descendant.
974
:param graph: A Graph object that can be used to query history
975
information. This can be None.
978
return InterBranch.get(other, self).update_revisions(stop_revision,
981
def import_last_revision_info(self, source_repo, revno, revid):
982
"""Set the last revision info, importing from another repo if necessary.
984
This is used by the bound branch code to upload a revision to
985
the master branch first before updating the tip of the local branch.
987
:param source_repo: Source repository to optionally fetch from
988
:param revno: Revision number of the new tip
989
:param revid: Revision id of the new tip
991
if not self.repository.has_same_location(source_repo):
992
self.repository.fetch(source_repo, revision_id=revid)
993
self.set_last_revision_info(revno, revid)
995
def revision_id_to_revno(self, revision_id):
996
"""Given a revision id, return its revno"""
997
if _mod_revision.is_null(revision_id):
999
history = self.revision_history()
1001
return history.index(revision_id) + 1
1003
raise errors.NoSuchRevision(self, revision_id)
1006
def get_rev_id(self, revno, history=None):
1007
"""Find the revision id of the specified revno."""
1009
return _mod_revision.NULL_REVISION
1010
last_revno, last_revid = self.last_revision_info()
1011
if revno == last_revno:
1013
if revno <= 0 or revno > last_revno:
1014
raise errors.NoSuchRevision(self, revno)
1015
distance_from_last = last_revno - revno
1016
if len(self._partial_revision_history_cache) <= distance_from_last:
1017
self._extend_partial_history(distance_from_last)
1018
return self._partial_revision_history_cache[distance_from_last]
1021
def pull(self, source, overwrite=False, stop_revision=None,
1022
possible_transports=None, *args, **kwargs):
1023
"""Mirror source into this branch.
1025
This branch is considered to be 'local', having low latency.
1027
:returns: PullResult instance
1029
return InterBranch.get(source, self).pull(overwrite=overwrite,
1030
stop_revision=stop_revision,
1031
possible_transports=possible_transports, *args, **kwargs)
1033
def push(self, target, overwrite=False, stop_revision=None, *args,
1035
"""Mirror this branch into target.
1037
This branch is considered to be 'local', having low latency.
1039
return InterBranch.get(self, target).push(overwrite, stop_revision,
1042
def lossy_push(self, target, stop_revision=None):
1043
"""Push deltas into another branch.
1045
:note: This does not, like push, retain the revision ids from
1046
the source branch and will, rather than adding bzr-specific
1047
metadata, push only those semantics of the revision that can be
1048
natively represented by this branch' VCS.
1050
:param target: Target branch
1051
:param stop_revision: Revision to push, defaults to last revision.
1052
:return: BranchPushResult with an extra member revidmap:
1053
A dictionary mapping revision ids from the target branch
1054
to new revision ids in the target branch, for each
1055
revision that was pushed.
1057
inter = InterBranch.get(self, target)
1058
lossy_push = getattr(inter, "lossy_push", None)
1059
if lossy_push is None:
1060
raise errors.LossyPushToSameVCS(self, target)
1061
return lossy_push(stop_revision)
1063
def basis_tree(self):
1064
"""Return `Tree` object for last revision."""
1065
return self.repository.revision_tree(self.last_revision())
1067
def get_parent(self):
1068
"""Return the parent location of the branch.
1070
This is the default location for pull/missing. The usual
1071
pattern is that the user can override it by specifying a
1074
parent = self._get_parent_location()
1077
# This is an old-format absolute path to a local branch
1078
# turn it into a url
1079
if parent.startswith('/'):
1080
parent = urlutils.local_path_to_url(parent.decode('utf8'))
1082
return urlutils.join(self.base[:-1], parent)
1083
except errors.InvalidURLJoin, e:
1084
raise errors.InaccessibleParent(parent, self.user_url)
1086
def _get_parent_location(self):
1087
raise NotImplementedError(self._get_parent_location)
1089
def _set_config_location(self, name, url, config=None,
1090
make_relative=False):
1092
config = self.get_config()
1096
url = urlutils.relative_url(self.base, url)
1097
config.set_user_option(name, url, warn_masked=True)
1099
def _get_config_location(self, name, config=None):
1101
config = self.get_config()
1102
location = config.get_user_option(name)
1107
def get_child_submit_format(self):
1108
"""Return the preferred format of submissions to this branch."""
1109
return self.get_config().get_user_option("child_submit_format")
1111
def get_submit_branch(self):
1112
"""Return the submit location of the branch.
1114
This is the default location for bundle. The usual
1115
pattern is that the user can override it by specifying a
1118
return self.get_config().get_user_option('submit_branch')
1120
def set_submit_branch(self, location):
1121
"""Return the submit location of the branch.
1123
This is the default location for bundle. The usual
1124
pattern is that the user can override it by specifying a
1127
self.get_config().set_user_option('submit_branch', location,
1130
def get_public_branch(self):
1131
"""Return the public location of the branch.
1133
This is used by merge directives.
1135
return self._get_config_location('public_branch')
1137
def set_public_branch(self, location):
1138
"""Return the submit location of the branch.
1140
This is the default location for bundle. The usual
1141
pattern is that the user can override it by specifying a
1144
self._set_config_location('public_branch', location)
1146
def get_push_location(self):
1147
"""Return the None or the location to push this branch to."""
1148
push_loc = self.get_config().get_user_option('push_location')
1151
def set_push_location(self, location):
1152
"""Set a new push location for this branch."""
1153
raise NotImplementedError(self.set_push_location)
1155
def _run_post_change_branch_tip_hooks(self, old_revno, old_revid):
1156
"""Run the post_change_branch_tip hooks."""
1157
hooks = Branch.hooks['post_change_branch_tip']
1160
new_revno, new_revid = self.last_revision_info()
1161
params = ChangeBranchTipParams(
1162
self, old_revno, new_revno, old_revid, new_revid)
1166
def _run_pre_change_branch_tip_hooks(self, new_revno, new_revid):
1167
"""Run the pre_change_branch_tip hooks."""
1168
hooks = Branch.hooks['pre_change_branch_tip']
1171
old_revno, old_revid = self.last_revision_info()
1172
params = ChangeBranchTipParams(
1173
self, old_revno, new_revno, old_revid, new_revid)
1179
"""Synchronise this branch with the master branch if any.
1181
:return: None or the last_revision pivoted out during the update.
1185
def check_revno(self, revno):
1187
Check whether a revno corresponds to any revision.
1188
Zero (the NULL revision) is considered valid.
1191
self.check_real_revno(revno)
1193
def check_real_revno(self, revno):
1195
Check whether a revno corresponds to a real revision.
1196
Zero (the NULL revision) is considered invalid
1198
if revno < 1 or revno > self.revno():
1199
raise errors.InvalidRevisionNumber(revno)
1202
def clone(self, to_bzrdir, revision_id=None, repository_policy=None):
1203
"""Clone this branch into to_bzrdir preserving all semantic values.
1205
Most API users will want 'create_clone_on_transport', which creates a
1206
new bzrdir and branch on the fly.
1208
revision_id: if not None, the revision history in the new branch will
1209
be truncated to end with revision_id.
1211
result = to_bzrdir.create_branch()
1214
if repository_policy is not None:
1215
repository_policy.configure_branch(result)
1216
self.copy_content_into(result, revision_id=revision_id)
1222
def sprout(self, to_bzrdir, revision_id=None, repository_policy=None):
1223
"""Create a new line of development from the branch, into to_bzrdir.
1225
to_bzrdir controls the branch format.
1227
revision_id: if not None, the revision history in the new branch will
1228
be truncated to end with revision_id.
1230
if (repository_policy is not None and
1231
repository_policy.requires_stacking()):
1232
to_bzrdir._format.require_stacking(_skip_repo=True)
1233
result = to_bzrdir.create_branch()
1236
if repository_policy is not None:
1237
repository_policy.configure_branch(result)
1238
self.copy_content_into(result, revision_id=revision_id)
1239
result.set_parent(self.bzrdir.root_transport.base)
1244
def _synchronize_history(self, destination, revision_id):
1245
"""Synchronize last revision and revision history between branches.
1247
This version is most efficient when the destination is also a
1248
BzrBranch6, but works for BzrBranch5, as long as the destination's
1249
repository contains all the lefthand ancestors of the intended
1250
last_revision. If not, set_last_revision_info will fail.
1252
:param destination: The branch to copy the history into
1253
:param revision_id: The revision-id to truncate history at. May
1254
be None to copy complete history.
1256
source_revno, source_revision_id = self.last_revision_info()
1257
if revision_id is None:
1258
revno, revision_id = source_revno, source_revision_id
1260
graph = self.repository.get_graph()
1262
revno = graph.find_distance_to_null(revision_id,
1263
[(source_revision_id, source_revno)])
1264
except errors.GhostRevisionsHaveNoRevno:
1265
# Default to 1, if we can't find anything else
1267
destination.set_last_revision_info(revno, revision_id)
1270
def copy_content_into(self, destination, revision_id=None):
1271
"""Copy the content of self into destination.
1273
revision_id: if not None, the revision history in the new branch will
1274
be truncated to end with revision_id.
1276
self.update_references(destination)
1277
self._synchronize_history(destination, revision_id)
1279
parent = self.get_parent()
1280
except errors.InaccessibleParent, e:
1281
mutter('parent was not accessible to copy: %s', e)
1284
destination.set_parent(parent)
1285
if self._push_should_merge_tags():
1286
self.tags.merge_to(destination.tags)
1288
def update_references(self, target):
1289
if not getattr(self._format, 'supports_reference_locations', False):
1291
reference_dict = self._get_all_reference_info()
1292
if len(reference_dict) == 0:
1294
old_base = self.base
1295
new_base = target.base
1296
target_reference_dict = target._get_all_reference_info()
1297
for file_id, (tree_path, branch_location) in (
1298
reference_dict.items()):
1299
branch_location = urlutils.rebase_url(branch_location,
1301
target_reference_dict.setdefault(
1302
file_id, (tree_path, branch_location))
1303
target._set_all_reference_info(target_reference_dict)
1306
def check(self, refs):
1307
"""Check consistency of the branch.
1309
In particular this checks that revisions given in the revision-history
1310
do actually match up in the revision graph, and that they're all
1311
present in the repository.
1313
Callers will typically also want to check the repository.
1315
:param refs: Calculated refs for this branch as specified by
1316
branch._get_check_refs()
1317
:return: A BranchCheckResult.
1319
result = BranchCheckResult(self)
1320
last_revno, last_revision_id = self.last_revision_info()
1321
actual_revno = refs[('lefthand-distance', last_revision_id)]
1322
if actual_revno != last_revno:
1323
result.errors.append(errors.BzrCheckError(
1324
'revno does not match len(mainline) %s != %s' % (
1325
last_revno, actual_revno)))
1326
# TODO: We should probably also check that self.revision_history
1327
# matches the repository for older branch formats.
1328
# If looking for the code that cross-checks repository parents against
1329
# the iter_reverse_revision_history output, that is now a repository
1333
def _get_checkout_format(self):
1334
"""Return the most suitable metadir for a checkout of this branch.
1335
Weaves are used if this branch's repository uses weaves.
1337
if isinstance(self.bzrdir, bzrdir.BzrDirPreSplitOut):
1338
from bzrlib.repofmt import weaverepo
1339
format = bzrdir.BzrDirMetaFormat1()
1340
format.repository_format = weaverepo.RepositoryFormat7()
1342
format = self.repository.bzrdir.checkout_metadir()
1343
format.set_branch_format(self._format)
1346
def create_clone_on_transport(self, to_transport, revision_id=None,
1347
stacked_on=None, create_prefix=False, use_existing_dir=False):
1348
"""Create a clone of this branch and its bzrdir.
1350
:param to_transport: The transport to clone onto.
1351
:param revision_id: The revision id to use as tip in the new branch.
1352
If None the tip is obtained from this branch.
1353
:param stacked_on: An optional URL to stack the clone on.
1354
:param create_prefix: Create any missing directories leading up to
1356
:param use_existing_dir: Use an existing directory if one exists.
1358
# XXX: Fix the bzrdir API to allow getting the branch back from the
1359
# clone call. Or something. 20090224 RBC/spiv.
1360
if revision_id is None:
1361
revision_id = self.last_revision()
1362
dir_to = self.bzrdir.clone_on_transport(to_transport,
1363
revision_id=revision_id, stacked_on=stacked_on,
1364
create_prefix=create_prefix, use_existing_dir=use_existing_dir)
1365
return dir_to.open_branch()
1367
def create_checkout(self, to_location, revision_id=None,
1368
lightweight=False, accelerator_tree=None,
1370
"""Create a checkout of a branch.
1372
:param to_location: The url to produce the checkout at
1373
:param revision_id: The revision to check out
1374
:param lightweight: If True, produce a lightweight checkout, otherwise,
1375
produce a bound branch (heavyweight checkout)
1376
:param accelerator_tree: A tree which can be used for retrieving file
1377
contents more quickly than the revision tree, i.e. a workingtree.
1378
The revision tree will be used for cases where accelerator_tree's
1379
content is different.
1380
:param hardlink: If true, hard-link files from accelerator_tree,
1382
:return: The tree of the created checkout
1384
t = transport.get_transport(to_location)
1387
format = self._get_checkout_format()
1388
checkout = format.initialize_on_transport(t)
1389
from_branch = BranchReferenceFormat().initialize(checkout,
1392
format = self._get_checkout_format()
1393
checkout_branch = bzrdir.BzrDir.create_branch_convenience(
1394
to_location, force_new_tree=False, format=format)
1395
checkout = checkout_branch.bzrdir
1396
checkout_branch.bind(self)
1397
# pull up to the specified revision_id to set the initial
1398
# branch tip correctly, and seed it with history.
1399
checkout_branch.pull(self, stop_revision=revision_id)
1401
tree = checkout.create_workingtree(revision_id,
1402
from_branch=from_branch,
1403
accelerator_tree=accelerator_tree,
1405
basis_tree = tree.basis_tree()
1406
basis_tree.lock_read()
1408
for path, file_id in basis_tree.iter_references():
1409
reference_parent = self.reference_parent(file_id, path)
1410
reference_parent.create_checkout(tree.abspath(path),
1411
basis_tree.get_reference_revision(file_id, path),
1418
def reconcile(self, thorough=True):
1419
"""Make sure the data stored in this branch is consistent."""
1420
from bzrlib.reconcile import BranchReconciler
1421
reconciler = BranchReconciler(self, thorough=thorough)
1422
reconciler.reconcile()
1425
def reference_parent(self, file_id, path, possible_transports=None):
1426
"""Return the parent branch for a tree-reference file_id
1427
:param file_id: The file_id of the tree reference
1428
:param path: The path of the file_id in the tree
1429
:return: A branch associated with the file_id
1431
# FIXME should provide multiple branches, based on config
1432
return Branch.open(self.bzrdir.root_transport.clone(path).base,
1433
possible_transports=possible_transports)
1435
def supports_tags(self):
1436
return self._format.supports_tags()
1438
def automatic_tag_name(self, revision_id):
1439
"""Try to automatically find the tag name for a revision.
1441
:param revision_id: Revision id of the revision.
1442
:return: A tag name or None if no tag name could be determined.
1444
for hook in Branch.hooks['automatic_tag_name']:
1445
ret = hook(self, revision_id)
1450
def _check_if_descendant_or_diverged(self, revision_a, revision_b, graph,
1452
"""Ensure that revision_b is a descendant of revision_a.
1454
This is a helper function for update_revisions.
1456
:raises: DivergedBranches if revision_b has diverged from revision_a.
1457
:returns: True if revision_b is a descendant of revision_a.
1459
relation = self._revision_relations(revision_a, revision_b, graph)
1460
if relation == 'b_descends_from_a':
1462
elif relation == 'diverged':
1463
raise errors.DivergedBranches(self, other_branch)
1464
elif relation == 'a_descends_from_b':
1467
raise AssertionError("invalid relation: %r" % (relation,))
1469
def _revision_relations(self, revision_a, revision_b, graph):
1470
"""Determine the relationship between two revisions.
1472
:returns: One of: 'a_descends_from_b', 'b_descends_from_a', 'diverged'
1474
heads = graph.heads([revision_a, revision_b])
1475
if heads == set([revision_b]):
1476
return 'b_descends_from_a'
1477
elif heads == set([revision_a, revision_b]):
1478
# These branches have diverged
1480
elif heads == set([revision_a]):
1481
return 'a_descends_from_b'
1483
raise AssertionError("invalid heads: %r" % (heads,))
1486
class BranchFormat(object):
1487
"""An encapsulation of the initialization and open routines for a format.
1489
Formats provide three things:
1490
* An initialization routine,
1494
Formats are placed in an dict by their format string for reference
1495
during branch opening. Its not required that these be instances, they
1496
can be classes themselves with class methods - it simply depends on
1497
whether state is needed for a given format or not.
1499
Once a format is deprecated, just deprecate the initialize and open
1500
methods on the format class. Do not deprecate the object, as the
1501
object will be created every time regardless.
1504
_default_format = None
1505
"""The default format used for new branches."""
1508
"""The known formats."""
1510
can_set_append_revisions_only = True
1512
def __eq__(self, other):
1513
return self.__class__ is other.__class__
1515
def __ne__(self, other):
1516
return not (self == other)
1519
def find_format(klass, a_bzrdir, name=None):
1520
"""Return the format for the branch object in a_bzrdir."""
1522
transport = a_bzrdir.get_branch_transport(None, name=name)
1523
format_string = transport.get_bytes("format")
1524
return klass._formats[format_string]
1525
except errors.NoSuchFile:
1526
raise errors.NotBranchError(path=transport.base, bzrdir=a_bzrdir)
1528
raise errors.UnknownFormatError(format=format_string, kind='branch')
1531
def get_default_format(klass):
1532
"""Return the current default format."""
1533
return klass._default_format
1535
def get_reference(self, a_bzrdir):
1536
"""Get the target reference of the branch in a_bzrdir.
1538
format probing must have been completed before calling
1539
this method - it is assumed that the format of the branch
1540
in a_bzrdir is correct.
1542
:param a_bzrdir: The bzrdir to get the branch data from.
1543
:return: None if the branch is not a reference branch.
1548
def set_reference(self, a_bzrdir, to_branch):
1549
"""Set the target reference of the branch in a_bzrdir.
1551
format probing must have been completed before calling
1552
this method - it is assumed that the format of the branch
1553
in a_bzrdir is correct.
1555
:param a_bzrdir: The bzrdir to set the branch reference for.
1556
:param to_branch: branch that the checkout is to reference
1558
raise NotImplementedError(self.set_reference)
1560
def get_format_string(self):
1561
"""Return the ASCII format string that identifies this format."""
1562
raise NotImplementedError(self.get_format_string)
1564
def get_format_description(self):
1565
"""Return the short format description for this format."""
1566
raise NotImplementedError(self.get_format_description)
1568
def _run_post_branch_init_hooks(self, a_bzrdir, name, branch):
1569
hooks = Branch.hooks['post_branch_init']
1572
params = BranchInitHookParams(self, a_bzrdir, name, branch)
1576
def _initialize_helper(self, a_bzrdir, utf8_files, name=None,
1577
lock_type='metadir', set_format=True):
1578
"""Initialize a branch in a bzrdir, with specified files
1580
:param a_bzrdir: The bzrdir to initialize the branch in
1581
:param utf8_files: The files to create as a list of
1582
(filename, content) tuples
1583
:param name: Name of colocated branch to create, if any
1584
:param set_format: If True, set the format with
1585
self.get_format_string. (BzrBranch4 has its format set
1587
:return: a branch in this format
1589
mutter('creating branch %r in %s', self, a_bzrdir.user_url)
1590
branch_transport = a_bzrdir.get_branch_transport(self, name=name)
1592
'metadir': ('lock', lockdir.LockDir),
1593
'branch4': ('branch-lock', lockable_files.TransportLock),
1595
lock_name, lock_class = lock_map[lock_type]
1596
control_files = lockable_files.LockableFiles(branch_transport,
1597
lock_name, lock_class)
1598
control_files.create_lock()
1600
control_files.lock_write()
1601
except errors.LockContention:
1602
if lock_type != 'branch4':
1608
utf8_files += [('format', self.get_format_string())]
1610
for (filename, content) in utf8_files:
1611
branch_transport.put_bytes(
1613
mode=a_bzrdir._get_file_mode())
1616
control_files.unlock()
1617
branch = self.open(a_bzrdir, name, _found=True)
1618
self._run_post_branch_init_hooks(a_bzrdir, name, branch)
1621
def initialize(self, a_bzrdir, name=None):
1622
"""Create a branch of this format in a_bzrdir.
1624
:param name: Name of the colocated branch to create.
1626
raise NotImplementedError(self.initialize)
1628
def is_supported(self):
1629
"""Is this format supported?
1631
Supported formats can be initialized and opened.
1632
Unsupported formats may not support initialization or committing or
1633
some other features depending on the reason for not being supported.
1637
def make_tags(self, branch):
1638
"""Create a tags object for branch.
1640
This method is on BranchFormat, because BranchFormats are reflected
1641
over the wire via network_name(), whereas full Branch instances require
1642
multiple VFS method calls to operate at all.
1644
The default implementation returns a disabled-tags instance.
1646
Note that it is normal for branch to be a RemoteBranch when using tags
1649
return DisabledTags(branch)
1651
def network_name(self):
1652
"""A simple byte string uniquely identifying this format for RPC calls.
1654
MetaDir branch formats use their disk format string to identify the
1655
repository over the wire. All in one formats such as bzr < 0.8, and
1656
foreign formats like svn/git and hg should use some marker which is
1657
unique and immutable.
1659
raise NotImplementedError(self.network_name)
1661
def open(self, a_bzrdir, name=None, _found=False, ignore_fallbacks=False):
1662
"""Return the branch object for a_bzrdir
1664
:param a_bzrdir: A BzrDir that contains a branch.
1665
:param name: Name of colocated branch to open
1666
:param _found: a private parameter, do not use it. It is used to
1667
indicate if format probing has already be done.
1668
:param ignore_fallbacks: when set, no fallback branches will be opened
1669
(if there are any). Default is to open fallbacks.
1671
raise NotImplementedError(self.open)
1674
def register_format(klass, format):
1675
"""Register a metadir format."""
1676
klass._formats[format.get_format_string()] = format
1677
# Metadir formats have a network name of their format string, and get
1678
# registered as class factories.
1679
network_format_registry.register(format.get_format_string(), format.__class__)
1682
def set_default_format(klass, format):
1683
klass._default_format = format
1685
def supports_set_append_revisions_only(self):
1686
"""True if this format supports set_append_revisions_only."""
1689
def supports_stacking(self):
1690
"""True if this format records a stacked-on branch."""
1694
def unregister_format(klass, format):
1695
del klass._formats[format.get_format_string()]
1698
return self.get_format_description().rstrip()
1700
def supports_tags(self):
1701
"""True if this format supports tags stored in the branch"""
1702
return False # by default
1705
class BranchHooks(Hooks):
1706
"""A dictionary mapping hook name to a list of callables for branch hooks.
1708
e.g. ['set_rh'] Is the list of items to be called when the
1709
set_revision_history function is invoked.
1713
"""Create the default hooks.
1715
These are all empty initially, because by default nothing should get
1718
Hooks.__init__(self)
1719
self.create_hook(HookPoint('set_rh',
1720
"Invoked whenever the revision history has been set via "
1721
"set_revision_history. The api signature is (branch, "
1722
"revision_history), and the branch will be write-locked. "
1723
"The set_rh hook can be expensive for bzr to trigger, a better "
1724
"hook to use is Branch.post_change_branch_tip.", (0, 15), None))
1725
self.create_hook(HookPoint('open',
1726
"Called with the Branch object that has been opened after a "
1727
"branch is opened.", (1, 8), None))
1728
self.create_hook(HookPoint('post_push',
1729
"Called after a push operation completes. post_push is called "
1730
"with a bzrlib.branch.BranchPushResult object and only runs in the "
1731
"bzr client.", (0, 15), None))
1732
self.create_hook(HookPoint('post_pull',
1733
"Called after a pull operation completes. post_pull is called "
1734
"with a bzrlib.branch.PullResult object and only runs in the "
1735
"bzr client.", (0, 15), None))
1736
self.create_hook(HookPoint('pre_commit',
1737
"Called after a commit is calculated but before it is is "
1738
"completed. pre_commit is called with (local, master, old_revno, "
1739
"old_revid, future_revno, future_revid, tree_delta, future_tree"
1740
"). old_revid is NULL_REVISION for the first commit to a branch, "
1741
"tree_delta is a TreeDelta object describing changes from the "
1742
"basis revision. hooks MUST NOT modify this delta. "
1743
" future_tree is an in-memory tree obtained from "
1744
"CommitBuilder.revision_tree() and hooks MUST NOT modify this "
1745
"tree.", (0,91), None))
1746
self.create_hook(HookPoint('post_commit',
1747
"Called in the bzr client after a commit has completed. "
1748
"post_commit is called with (local, master, old_revno, old_revid, "
1749
"new_revno, new_revid). old_revid is NULL_REVISION for the first "
1750
"commit to a branch.", (0, 15), None))
1751
self.create_hook(HookPoint('post_uncommit',
1752
"Called in the bzr client after an uncommit completes. "
1753
"post_uncommit is called with (local, master, old_revno, "
1754
"old_revid, new_revno, new_revid) where local is the local branch "
1755
"or None, master is the target branch, and an empty branch "
1756
"receives new_revno of 0, new_revid of None.", (0, 15), None))
1757
self.create_hook(HookPoint('pre_change_branch_tip',
1758
"Called in bzr client and server before a change to the tip of a "
1759
"branch is made. pre_change_branch_tip is called with a "
1760
"bzrlib.branch.ChangeBranchTipParams. Note that push, pull, "
1761
"commit, uncommit will all trigger this hook.", (1, 6), None))
1762
self.create_hook(HookPoint('post_change_branch_tip',
1763
"Called in bzr client and server after a change to the tip of a "
1764
"branch is made. post_change_branch_tip is called with a "
1765
"bzrlib.branch.ChangeBranchTipParams. Note that push, pull, "
1766
"commit, uncommit will all trigger this hook.", (1, 4), None))
1767
self.create_hook(HookPoint('transform_fallback_location',
1768
"Called when a stacked branch is activating its fallback "
1769
"locations. transform_fallback_location is called with (branch, "
1770
"url), and should return a new url. Returning the same url "
1771
"allows it to be used as-is, returning a different one can be "
1772
"used to cause the branch to stack on a closer copy of that "
1773
"fallback_location. Note that the branch cannot have history "
1774
"accessing methods called on it during this hook because the "
1775
"fallback locations have not been activated. When there are "
1776
"multiple hooks installed for transform_fallback_location, "
1777
"all are called with the url returned from the previous hook."
1778
"The order is however undefined.", (1, 9), None))
1779
self.create_hook(HookPoint('automatic_tag_name',
1780
"Called to determine an automatic tag name for a revision."
1781
"automatic_tag_name is called with (branch, revision_id) and "
1782
"should return a tag name or None if no tag name could be "
1783
"determined. The first non-None tag name returned will be used.",
1785
self.create_hook(HookPoint('post_branch_init',
1786
"Called after new branch initialization completes. "
1787
"post_branch_init is called with a "
1788
"bzrlib.branch.BranchInitHookParams. "
1789
"Note that init, branch and checkout (both heavyweight and "
1790
"lightweight) will all trigger this hook.", (2, 2), None))
1791
self.create_hook(HookPoint('post_switch',
1792
"Called after a checkout switches branch. "
1793
"post_switch is called with a "
1794
"bzrlib.branch.SwitchHookParams.", (2, 2), None))
1798
# install the default hooks into the Branch class.
1799
Branch.hooks = BranchHooks()
1802
class ChangeBranchTipParams(object):
1803
"""Object holding parameters passed to *_change_branch_tip hooks.
1805
There are 5 fields that hooks may wish to access:
1807
:ivar branch: the branch being changed
1808
:ivar old_revno: revision number before the change
1809
:ivar new_revno: revision number after the change
1810
:ivar old_revid: revision id before the change
1811
:ivar new_revid: revision id after the change
1813
The revid fields are strings. The revno fields are integers.
1816
def __init__(self, branch, old_revno, new_revno, old_revid, new_revid):
1817
"""Create a group of ChangeBranchTip parameters.
1819
:param branch: The branch being changed.
1820
:param old_revno: Revision number before the change.
1821
:param new_revno: Revision number after the change.
1822
:param old_revid: Tip revision id before the change.
1823
:param new_revid: Tip revision id after the change.
1825
self.branch = branch
1826
self.old_revno = old_revno
1827
self.new_revno = new_revno
1828
self.old_revid = old_revid
1829
self.new_revid = new_revid
1831
def __eq__(self, other):
1832
return self.__dict__ == other.__dict__
1835
return "<%s of %s from (%s, %s) to (%s, %s)>" % (
1836
self.__class__.__name__, self.branch,
1837
self.old_revno, self.old_revid, self.new_revno, self.new_revid)
1840
class BranchInitHookParams(object):
1841
"""Object holding parameters passed to *_branch_init hooks.
1843
There are 4 fields that hooks may wish to access:
1845
:ivar format: the branch format
1846
:ivar bzrdir: the BzrDir where the branch will be/has been initialized
1847
:ivar name: name of colocated branch, if any (or None)
1848
:ivar branch: the branch created
1850
Note that for lightweight checkouts, the bzrdir and format fields refer to
1851
the checkout, hence they are different from the corresponding fields in
1852
branch, which refer to the original branch.
1855
def __init__(self, format, a_bzrdir, name, branch):
1856
"""Create a group of BranchInitHook parameters.
1858
:param format: the branch format
1859
:param a_bzrdir: the BzrDir where the branch will be/has been
1861
:param name: name of colocated branch, if any (or None)
1862
:param branch: the branch created
1864
Note that for lightweight checkouts, the bzrdir and format fields refer
1865
to the checkout, hence they are different from the corresponding fields
1866
in branch, which refer to the original branch.
1868
self.format = format
1869
self.bzrdir = a_bzrdir
1871
self.branch = branch
1873
def __eq__(self, other):
1874
return self.__dict__ == other.__dict__
1878
return "<%s of %s>" % (self.__class__.__name__, self.branch)
1880
return "<%s of format:%s bzrdir:%s>" % (
1881
self.__class__.__name__, self.branch,
1882
self.format, self.bzrdir)
1885
class SwitchHookParams(object):
1886
"""Object holding parameters passed to *_switch hooks.
1888
There are 4 fields that hooks may wish to access:
1890
:ivar control_dir: BzrDir of the checkout to change
1891
:ivar to_branch: branch that the checkout is to reference
1892
:ivar force: skip the check for local commits in a heavy checkout
1893
:ivar revision_id: revision ID to switch to (or None)
1896
def __init__(self, control_dir, to_branch, force, revision_id):
1897
"""Create a group of SwitchHook parameters.
1899
:param control_dir: BzrDir of the checkout to change
1900
:param to_branch: branch that the checkout is to reference
1901
:param force: skip the check for local commits in a heavy checkout
1902
:param revision_id: revision ID to switch to (or None)
1904
self.control_dir = control_dir
1905
self.to_branch = to_branch
1907
self.revision_id = revision_id
1909
def __eq__(self, other):
1910
return self.__dict__ == other.__dict__
1913
return "<%s for %s to (%s, %s)>" % (self.__class__.__name__,
1914
self.control_dir, self.to_branch,
1918
class BzrBranchFormat4(BranchFormat):
1919
"""Bzr branch format 4.
1922
- a revision-history file.
1923
- a branch-lock lock file [ to be shared with the bzrdir ]
1926
def get_format_description(self):
1927
"""See BranchFormat.get_format_description()."""
1928
return "Branch format 4"
1930
def initialize(self, a_bzrdir, name=None):
1931
"""Create a branch of this format in a_bzrdir."""
1932
utf8_files = [('revision-history', ''),
1933
('branch-name', ''),
1935
return self._initialize_helper(a_bzrdir, utf8_files, name=name,
1936
lock_type='branch4', set_format=False)
1939
super(BzrBranchFormat4, self).__init__()
1940
self._matchingbzrdir = bzrdir.BzrDirFormat6()
1942
def network_name(self):
1943
"""The network name for this format is the control dirs disk label."""
1944
return self._matchingbzrdir.get_format_string()
1946
def open(self, a_bzrdir, name=None, _found=False, ignore_fallbacks=False):
1947
"""See BranchFormat.open()."""
1949
# we are being called directly and must probe.
1950
raise NotImplementedError
1951
return BzrBranch(_format=self,
1952
_control_files=a_bzrdir._control_files,
1955
_repository=a_bzrdir.open_repository())
1958
return "Bazaar-NG branch format 4"
1961
class BranchFormatMetadir(BranchFormat):
1962
"""Common logic for meta-dir based branch formats."""
1964
def _branch_class(self):
1965
"""What class to instantiate on open calls."""
1966
raise NotImplementedError(self._branch_class)
1968
def network_name(self):
1969
"""A simple byte string uniquely identifying this format for RPC calls.
1971
Metadir branch formats use their format string.
1973
return self.get_format_string()
1975
def open(self, a_bzrdir, name=None, _found=False, ignore_fallbacks=False):
1976
"""See BranchFormat.open()."""
1978
format = BranchFormat.find_format(a_bzrdir, name=name)
1979
if format.__class__ != self.__class__:
1980
raise AssertionError("wrong format %r found for %r" %
1982
transport = a_bzrdir.get_branch_transport(None, name=name)
1984
control_files = lockable_files.LockableFiles(transport, 'lock',
1986
return self._branch_class()(_format=self,
1987
_control_files=control_files,
1990
_repository=a_bzrdir.find_repository(),
1991
ignore_fallbacks=ignore_fallbacks)
1992
except errors.NoSuchFile:
1993
raise errors.NotBranchError(path=transport.base, bzrdir=a_bzrdir)
1996
super(BranchFormatMetadir, self).__init__()
1997
self._matchingbzrdir = bzrdir.BzrDirMetaFormat1()
1998
self._matchingbzrdir.set_branch_format(self)
2000
def supports_tags(self):
2004
class BzrBranchFormat5(BranchFormatMetadir):
2005
"""Bzr branch format 5.
2008
- a revision-history file.
2010
- a lock dir guarding the branch itself
2011
- all of this stored in a branch/ subdirectory
2012
- works with shared repositories.
2014
This format is new in bzr 0.8.
2017
def _branch_class(self):
2020
def get_format_string(self):
2021
"""See BranchFormat.get_format_string()."""
2022
return "Bazaar-NG branch format 5\n"
2024
def get_format_description(self):
2025
"""See BranchFormat.get_format_description()."""
2026
return "Branch format 5"
2028
def initialize(self, a_bzrdir, name=None):
2029
"""Create a branch of this format in a_bzrdir."""
2030
utf8_files = [('revision-history', ''),
2031
('branch-name', ''),
2033
return self._initialize_helper(a_bzrdir, utf8_files, name)
2035
def supports_tags(self):
2039
class BzrBranchFormat6(BranchFormatMetadir):
2040
"""Branch format with last-revision and tags.
2042
Unlike previous formats, this has no explicit revision history. Instead,
2043
this just stores the last-revision, and the left-hand history leading
2044
up to there is the history.
2046
This format was introduced in bzr 0.15
2047
and became the default in 0.91.
2050
def _branch_class(self):
2053
def get_format_string(self):
2054
"""See BranchFormat.get_format_string()."""
2055
return "Bazaar Branch Format 6 (bzr 0.15)\n"
2057
def get_format_description(self):
2058
"""See BranchFormat.get_format_description()."""
2059
return "Branch format 6"
2061
def initialize(self, a_bzrdir, name=None):
2062
"""Create a branch of this format in a_bzrdir."""
2063
utf8_files = [('last-revision', '0 null:\n'),
2064
('branch.conf', ''),
2067
return self._initialize_helper(a_bzrdir, utf8_files, name)
2069
def make_tags(self, branch):
2070
"""See bzrlib.branch.BranchFormat.make_tags()."""
2071
return BasicTags(branch)
2073
def supports_set_append_revisions_only(self):
2077
class BzrBranchFormat8(BranchFormatMetadir):
2078
"""Metadir format supporting storing locations of subtree branches."""
2080
def _branch_class(self):
2083
def get_format_string(self):
2084
"""See BranchFormat.get_format_string()."""
2085
return "Bazaar Branch Format 8 (needs bzr 1.15)\n"
2087
def get_format_description(self):
2088
"""See BranchFormat.get_format_description()."""
2089
return "Branch format 8"
2091
def initialize(self, a_bzrdir, name=None):
2092
"""Create a branch of this format in a_bzrdir."""
2093
utf8_files = [('last-revision', '0 null:\n'),
2094
('branch.conf', ''),
2098
return self._initialize_helper(a_bzrdir, utf8_files, name)
2101
super(BzrBranchFormat8, self).__init__()
2102
self._matchingbzrdir.repository_format = \
2103
RepositoryFormatKnitPack5RichRoot()
2105
def make_tags(self, branch):
2106
"""See bzrlib.branch.BranchFormat.make_tags()."""
2107
return BasicTags(branch)
2109
def supports_set_append_revisions_only(self):
2112
def supports_stacking(self):
2115
supports_reference_locations = True
2118
class BzrBranchFormat7(BzrBranchFormat8):
2119
"""Branch format with last-revision, tags, and a stacked location pointer.
2121
The stacked location pointer is passed down to the repository and requires
2122
a repository format with supports_external_lookups = True.
2124
This format was introduced in bzr 1.6.
2127
def initialize(self, a_bzrdir, name=None):
2128
"""Create a branch of this format in a_bzrdir."""
2129
utf8_files = [('last-revision', '0 null:\n'),
2130
('branch.conf', ''),
2133
return self._initialize_helper(a_bzrdir, utf8_files, name)
2135
def _branch_class(self):
2138
def get_format_string(self):
2139
"""See BranchFormat.get_format_string()."""
2140
return "Bazaar Branch Format 7 (needs bzr 1.6)\n"
2142
def get_format_description(self):
2143
"""See BranchFormat.get_format_description()."""
2144
return "Branch format 7"
2146
def supports_set_append_revisions_only(self):
2149
supports_reference_locations = False
2152
class BranchReferenceFormat(BranchFormat):
2153
"""Bzr branch reference format.
2155
Branch references are used in implementing checkouts, they
2156
act as an alias to the real branch which is at some other url.
2163
def get_format_string(self):
2164
"""See BranchFormat.get_format_string()."""
2165
return "Bazaar-NG Branch Reference Format 1\n"
2167
def get_format_description(self):
2168
"""See BranchFormat.get_format_description()."""
2169
return "Checkout reference format 1"
2171
def get_reference(self, a_bzrdir):
2172
"""See BranchFormat.get_reference()."""
2173
transport = a_bzrdir.get_branch_transport(None)
2174
return transport.get_bytes('location')
2176
def set_reference(self, a_bzrdir, to_branch):
2177
"""See BranchFormat.set_reference()."""
2178
transport = a_bzrdir.get_branch_transport(None)
2179
location = transport.put_bytes('location', to_branch.base)
2181
def initialize(self, a_bzrdir, name=None, target_branch=None):
2182
"""Create a branch of this format in a_bzrdir."""
2183
if target_branch is None:
2184
# this format does not implement branch itself, thus the implicit
2185
# creation contract must see it as uninitializable
2186
raise errors.UninitializableFormat(self)
2187
mutter('creating branch reference in %s', a_bzrdir.user_url)
2188
branch_transport = a_bzrdir.get_branch_transport(self, name=name)
2189
branch_transport.put_bytes('location',
2190
target_branch.bzrdir.user_url)
2191
branch_transport.put_bytes('format', self.get_format_string())
2193
a_bzrdir, name, _found=True,
2194
possible_transports=[target_branch.bzrdir.root_transport])
2195
self._run_post_branch_init_hooks(a_bzrdir, name, branch)
2199
super(BranchReferenceFormat, self).__init__()
2200
self._matchingbzrdir = bzrdir.BzrDirMetaFormat1()
2201
self._matchingbzrdir.set_branch_format(self)
2203
def _make_reference_clone_function(format, a_branch):
2204
"""Create a clone() routine for a branch dynamically."""
2205
def clone(to_bzrdir, revision_id=None,
2206
repository_policy=None):
2207
"""See Branch.clone()."""
2208
return format.initialize(to_bzrdir, target_branch=a_branch)
2209
# cannot obey revision_id limits when cloning a reference ...
2210
# FIXME RBC 20060210 either nuke revision_id for clone, or
2211
# emit some sort of warning/error to the caller ?!
2214
def open(self, a_bzrdir, name=None, _found=False, location=None,
2215
possible_transports=None, ignore_fallbacks=False):
2216
"""Return the branch that the branch reference in a_bzrdir points at.
2218
:param a_bzrdir: A BzrDir that contains a branch.
2219
:param name: Name of colocated branch to open, if any
2220
:param _found: a private parameter, do not use it. It is used to
2221
indicate if format probing has already be done.
2222
:param ignore_fallbacks: when set, no fallback branches will be opened
2223
(if there are any). Default is to open fallbacks.
2224
:param location: The location of the referenced branch. If
2225
unspecified, this will be determined from the branch reference in
2227
:param possible_transports: An optional reusable transports list.
2230
format = BranchFormat.find_format(a_bzrdir, name=name)
2231
if format.__class__ != self.__class__:
2232
raise AssertionError("wrong format %r found for %r" %
2234
if location is None:
2235
location = self.get_reference(a_bzrdir)
2236
real_bzrdir = bzrdir.BzrDir.open(
2237
location, possible_transports=possible_transports)
2238
result = real_bzrdir.open_branch(name=name,
2239
ignore_fallbacks=ignore_fallbacks)
2240
# this changes the behaviour of result.clone to create a new reference
2241
# rather than a copy of the content of the branch.
2242
# I did not use a proxy object because that needs much more extensive
2243
# testing, and we are only changing one behaviour at the moment.
2244
# If we decide to alter more behaviours - i.e. the implicit nickname
2245
# then this should be refactored to introduce a tested proxy branch
2246
# and a subclass of that for use in overriding clone() and ....
2248
result.clone = self._make_reference_clone_function(result)
2252
network_format_registry = registry.FormatRegistry()
2253
"""Registry of formats indexed by their network name.
2255
The network name for a branch format is an identifier that can be used when
2256
referring to formats with smart server operations. See
2257
BranchFormat.network_name() for more detail.
2261
# formats which have no format string are not discoverable
2262
# and not independently creatable, so are not registered.
2263
__format5 = BzrBranchFormat5()
2264
__format6 = BzrBranchFormat6()
2265
__format7 = BzrBranchFormat7()
2266
__format8 = BzrBranchFormat8()
2267
BranchFormat.register_format(__format5)
2268
BranchFormat.register_format(BranchReferenceFormat())
2269
BranchFormat.register_format(__format6)
2270
BranchFormat.register_format(__format7)
2271
BranchFormat.register_format(__format8)
2272
BranchFormat.set_default_format(__format7)
2273
_legacy_formats = [BzrBranchFormat4(),
2275
network_format_registry.register(
2276
_legacy_formats[0].network_name(), _legacy_formats[0].__class__)
2279
class BranchWriteLockResult(object):
2280
"""The result of write locking a branch.
2282
:ivar branch_token: The token obtained from the underlying branch lock, or
2284
:ivar unlock: A callable which will unlock the lock.
2287
def __init__(self, unlock, branch_token):
2288
self.branch_token = branch_token
2289
self.unlock = unlock
2292
return "BranchWriteLockResult(%s, %s)" % (self.branch_token,
2296
class BzrBranch(Branch, _RelockDebugMixin):
2297
"""A branch stored in the actual filesystem.
2299
Note that it's "local" in the context of the filesystem; it doesn't
2300
really matter if it's on an nfs/smb/afs/coda/... share, as long as
2301
it's writable, and can be accessed via the normal filesystem API.
2303
:ivar _transport: Transport for file operations on this branch's
2304
control files, typically pointing to the .bzr/branch directory.
2305
:ivar repository: Repository for this branch.
2306
:ivar base: The url of the base directory for this branch; the one
2307
containing the .bzr directory.
2308
:ivar name: Optional colocated branch name as it exists in the control
2312
def __init__(self, _format=None,
2313
_control_files=None, a_bzrdir=None, name=None,
2314
_repository=None, ignore_fallbacks=False):
2315
"""Create new branch object at a particular location."""
2316
if a_bzrdir is None:
2317
raise ValueError('a_bzrdir must be supplied')
2319
self.bzrdir = a_bzrdir
2320
self._base = self.bzrdir.transport.clone('..').base
2322
# XXX: We should be able to just do
2323
# self.base = self.bzrdir.root_transport.base
2324
# but this does not quite work yet -- mbp 20080522
2325
self._format = _format
2326
if _control_files is None:
2327
raise ValueError('BzrBranch _control_files is None')
2328
self.control_files = _control_files
2329
self._transport = _control_files._transport
2330
self.repository = _repository
2331
Branch.__init__(self)
2334
if self.name is None:
2335
return '%s(%s)' % (self.__class__.__name__, self.user_url)
2337
return '%s(%s,%s)' % (self.__class__.__name__, self.user_url,
2342
def _get_base(self):
2343
"""Returns the directory containing the control directory."""
2346
base = property(_get_base, doc="The URL for the root of this branch.")
2348
def _get_config(self):
2349
return TransportConfig(self._transport, 'branch.conf')
2351
def is_locked(self):
2352
return self.control_files.is_locked()
2354
def lock_write(self, token=None):
2355
"""Lock the branch for write operations.
2357
:param token: A token to permit reacquiring a previously held and
2359
:return: A BranchWriteLockResult.
2361
if not self.is_locked():
2362
self._note_lock('w')
2363
# All-in-one needs to always unlock/lock.
2364
repo_control = getattr(self.repository, 'control_files', None)
2365
if self.control_files == repo_control or not self.is_locked():
2366
self.repository._warn_if_deprecated(self)
2367
self.repository.lock_write()
2372
return BranchWriteLockResult(self.unlock,
2373
self.control_files.lock_write(token=token))
2376
self.repository.unlock()
2379
def lock_read(self):
2380
"""Lock the branch for read operations.
2382
:return: An object with an unlock method which will release the lock
2385
if not self.is_locked():
2386
self._note_lock('r')
2387
# All-in-one needs to always unlock/lock.
2388
repo_control = getattr(self.repository, 'control_files', None)
2389
if self.control_files == repo_control or not self.is_locked():
2390
self.repository._warn_if_deprecated(self)
2391
self.repository.lock_read()
2396
self.control_files.lock_read()
2400
self.repository.unlock()
2403
@only_raises(errors.LockNotHeld, errors.LockBroken)
2406
self.control_files.unlock()
2408
# All-in-one needs to always unlock/lock.
2409
repo_control = getattr(self.repository, 'control_files', None)
2410
if (self.control_files == repo_control or
2411
not self.control_files.is_locked()):
2412
self.repository.unlock()
2413
if not self.control_files.is_locked():
2414
# we just released the lock
2415
self._clear_cached_state()
2417
def peek_lock_mode(self):
2418
if self.control_files._lock_count == 0:
2421
return self.control_files._lock_mode
2423
def get_physical_lock_status(self):
2424
return self.control_files.get_physical_lock_status()
2427
def print_file(self, file, revision_id):
2428
"""See Branch.print_file."""
2429
return self.repository.print_file(file, revision_id)
2431
def _write_revision_history(self, history):
2432
"""Factored out of set_revision_history.
2434
This performs the actual writing to disk.
2435
It is intended to be called by BzrBranch5.set_revision_history."""
2436
self._transport.put_bytes(
2437
'revision-history', '\n'.join(history),
2438
mode=self.bzrdir._get_file_mode())
2441
def set_revision_history(self, rev_history):
2442
"""See Branch.set_revision_history."""
2443
if 'evil' in debug.debug_flags:
2444
mutter_callsite(3, "set_revision_history scales with history.")
2445
check_not_reserved_id = _mod_revision.check_not_reserved_id
2446
for rev_id in rev_history:
2447
check_not_reserved_id(rev_id)
2448
if Branch.hooks['post_change_branch_tip']:
2449
# Don't calculate the last_revision_info() if there are no hooks
2451
old_revno, old_revid = self.last_revision_info()
2452
if len(rev_history) == 0:
2453
revid = _mod_revision.NULL_REVISION
2455
revid = rev_history[-1]
2456
self._run_pre_change_branch_tip_hooks(len(rev_history), revid)
2457
self._write_revision_history(rev_history)
2458
self._clear_cached_state()
2459
self._cache_revision_history(rev_history)
2460
for hook in Branch.hooks['set_rh']:
2461
hook(self, rev_history)
2462
if Branch.hooks['post_change_branch_tip']:
2463
self._run_post_change_branch_tip_hooks(old_revno, old_revid)
2465
def _synchronize_history(self, destination, revision_id):
2466
"""Synchronize last revision and revision history between branches.
2468
This version is most efficient when the destination is also a
2469
BzrBranch5, but works for BzrBranch6 as long as the revision
2470
history is the true lefthand parent history, and all of the revisions
2471
are in the destination's repository. If not, set_revision_history
2474
:param destination: The branch to copy the history into
2475
:param revision_id: The revision-id to truncate history at. May
2476
be None to copy complete history.
2478
if not isinstance(destination._format, BzrBranchFormat5):
2479
super(BzrBranch, self)._synchronize_history(
2480
destination, revision_id)
2482
if revision_id == _mod_revision.NULL_REVISION:
2485
new_history = self.revision_history()
2486
if revision_id is not None and new_history != []:
2488
new_history = new_history[:new_history.index(revision_id) + 1]
2490
rev = self.repository.get_revision(revision_id)
2491
new_history = rev.get_history(self.repository)[1:]
2492
destination.set_revision_history(new_history)
2495
def set_last_revision_info(self, revno, revision_id):
2496
"""Set the last revision of this branch.
2498
The caller is responsible for checking that the revno is correct
2499
for this revision id.
2501
It may be possible to set the branch last revision to an id not
2502
present in the repository. However, branches can also be
2503
configured to check constraints on history, in which case this may not
2506
revision_id = _mod_revision.ensure_null(revision_id)
2507
# this old format stores the full history, but this api doesn't
2508
# provide it, so we must generate, and might as well check it's
2510
history = self._lefthand_history(revision_id)
2511
if len(history) != revno:
2512
raise AssertionError('%d != %d' % (len(history), revno))
2513
self.set_revision_history(history)
2515
def _gen_revision_history(self):
2516
history = self._transport.get_bytes('revision-history').split('\n')
2517
if history[-1:] == ['']:
2518
# There shouldn't be a trailing newline, but just in case.
2523
def generate_revision_history(self, revision_id, last_rev=None,
2525
"""Create a new revision history that will finish with revision_id.
2527
:param revision_id: the new tip to use.
2528
:param last_rev: The previous last_revision. If not None, then this
2529
must be a ancestory of revision_id, or DivergedBranches is raised.
2530
:param other_branch: The other branch that DivergedBranches should
2531
raise with respect to.
2533
self.set_revision_history(self._lefthand_history(revision_id,
2534
last_rev, other_branch))
2536
def basis_tree(self):
2537
"""See Branch.basis_tree."""
2538
return self.repository.revision_tree(self.last_revision())
2540
def _get_parent_location(self):
2541
_locs = ['parent', 'pull', 'x-pull']
2544
return self._transport.get_bytes(l).strip('\n')
2545
except errors.NoSuchFile:
2549
def _basic_push(self, target, overwrite, stop_revision):
2550
"""Basic implementation of push without bound branches or hooks.
2552
Must be called with source read locked and target write locked.
2554
result = BranchPushResult()
2555
result.source_branch = self
2556
result.target_branch = target
2557
result.old_revno, result.old_revid = target.last_revision_info()
2558
self.update_references(target)
2559
if result.old_revid != self.last_revision():
2560
# We assume that during 'push' this repository is closer than
2562
graph = self.repository.get_graph(target.repository)
2563
target.update_revisions(self, stop_revision,
2564
overwrite=overwrite, graph=graph)
2565
if self._push_should_merge_tags():
2566
result.tag_conflicts = self.tags.merge_to(target.tags,
2568
result.new_revno, result.new_revid = target.last_revision_info()
2571
def get_stacked_on_url(self):
2572
raise errors.UnstackableBranchFormat(self._format, self.user_url)
2574
def set_push_location(self, location):
2575
"""See Branch.set_push_location."""
2576
self.get_config().set_user_option(
2577
'push_location', location,
2578
store=_mod_config.STORE_LOCATION_NORECURSE)
2580
def _set_parent_location(self, url):
2582
self._transport.delete('parent')
2584
self._transport.put_bytes('parent', url + '\n',
2585
mode=self.bzrdir._get_file_mode())
2588
class BzrBranch5(BzrBranch):
2589
"""A format 5 branch. This supports new features over plain branches.
2591
It has support for a master_branch which is the data for bound branches.
2594
def get_bound_location(self):
2596
return self._transport.get_bytes('bound')[:-1]
2597
except errors.NoSuchFile:
2601
def get_master_branch(self, possible_transports=None):
2602
"""Return the branch we are bound to.
2604
:return: Either a Branch, or None
2606
This could memoise the branch, but if thats done
2607
it must be revalidated on each new lock.
2608
So for now we just don't memoise it.
2609
# RBC 20060304 review this decision.
2611
bound_loc = self.get_bound_location()
2615
return Branch.open(bound_loc,
2616
possible_transports=possible_transports)
2617
except (errors.NotBranchError, errors.ConnectionError), e:
2618
raise errors.BoundBranchConnectionFailure(
2622
def set_bound_location(self, location):
2623
"""Set the target where this branch is bound to.
2625
:param location: URL to the target branch
2628
self._transport.put_bytes('bound', location+'\n',
2629
mode=self.bzrdir._get_file_mode())
2632
self._transport.delete('bound')
2633
except errors.NoSuchFile:
2638
def bind(self, other):
2639
"""Bind this branch to the branch other.
2641
This does not push or pull data between the branches, though it does
2642
check for divergence to raise an error when the branches are not
2643
either the same, or one a prefix of the other. That behaviour may not
2644
be useful, so that check may be removed in future.
2646
:param other: The branch to bind to
2649
# TODO: jam 20051230 Consider checking if the target is bound
2650
# It is debatable whether you should be able to bind to
2651
# a branch which is itself bound.
2652
# Committing is obviously forbidden,
2653
# but binding itself may not be.
2654
# Since we *have* to check at commit time, we don't
2655
# *need* to check here
2657
# we want to raise diverged if:
2658
# last_rev is not in the other_last_rev history, AND
2659
# other_last_rev is not in our history, and do it without pulling
2661
self.set_bound_location(other.base)
2665
"""If bound, unbind"""
2666
return self.set_bound_location(None)
2669
def update(self, possible_transports=None):
2670
"""Synchronise this branch with the master branch if any.
2672
:return: None or the last_revision that was pivoted out during the
2675
master = self.get_master_branch(possible_transports)
2676
if master is not None:
2677
old_tip = _mod_revision.ensure_null(self.last_revision())
2678
self.pull(master, overwrite=True)
2679
if self.repository.get_graph().is_ancestor(old_tip,
2680
_mod_revision.ensure_null(self.last_revision())):
2686
class BzrBranch8(BzrBranch5):
2687
"""A branch that stores tree-reference locations."""
2689
def _open_hook(self):
2690
if self._ignore_fallbacks:
2693
url = self.get_stacked_on_url()
2694
except (errors.UnstackableRepositoryFormat, errors.NotStacked,
2695
errors.UnstackableBranchFormat):
2698
for hook in Branch.hooks['transform_fallback_location']:
2699
url = hook(self, url)
2701
hook_name = Branch.hooks.get_hook_name(hook)
2702
raise AssertionError(
2703
"'transform_fallback_location' hook %s returned "
2704
"None, not a URL." % hook_name)
2705
self._activate_fallback_location(url)
2707
def __init__(self, *args, **kwargs):
2708
self._ignore_fallbacks = kwargs.get('ignore_fallbacks', False)
2709
super(BzrBranch8, self).__init__(*args, **kwargs)
2710
self._last_revision_info_cache = None
2711
self._reference_info = None
2713
def _clear_cached_state(self):
2714
super(BzrBranch8, self)._clear_cached_state()
2715
self._last_revision_info_cache = None
2716
self._reference_info = None
2718
def _last_revision_info(self):
2719
revision_string = self._transport.get_bytes('last-revision')
2720
revno, revision_id = revision_string.rstrip('\n').split(' ', 1)
2721
revision_id = cache_utf8.get_cached_utf8(revision_id)
2723
return revno, revision_id
2725
def _write_last_revision_info(self, revno, revision_id):
2726
"""Simply write out the revision id, with no checks.
2728
Use set_last_revision_info to perform this safely.
2730
Does not update the revision_history cache.
2731
Intended to be called by set_last_revision_info and
2732
_write_revision_history.
2734
revision_id = _mod_revision.ensure_null(revision_id)
2735
out_string = '%d %s\n' % (revno, revision_id)
2736
self._transport.put_bytes('last-revision', out_string,
2737
mode=self.bzrdir._get_file_mode())
2740
def set_last_revision_info(self, revno, revision_id):
2741
revision_id = _mod_revision.ensure_null(revision_id)
2742
old_revno, old_revid = self.last_revision_info()
2743
if self._get_append_revisions_only():
2744
self._check_history_violation(revision_id)
2745
self._run_pre_change_branch_tip_hooks(revno, revision_id)
2746
self._write_last_revision_info(revno, revision_id)
2747
self._clear_cached_state()
2748
self._last_revision_info_cache = revno, revision_id
2749
self._run_post_change_branch_tip_hooks(old_revno, old_revid)
2751
def _synchronize_history(self, destination, revision_id):
2752
"""Synchronize last revision and revision history between branches.
2754
:see: Branch._synchronize_history
2756
# XXX: The base Branch has a fast implementation of this method based
2757
# on set_last_revision_info, but BzrBranch/BzrBranch5 have a slower one
2758
# that uses set_revision_history. This class inherits from BzrBranch5,
2759
# but wants the fast implementation, so it calls
2760
# Branch._synchronize_history directly.
2761
Branch._synchronize_history(self, destination, revision_id)
2763
def _check_history_violation(self, revision_id):
2764
last_revision = _mod_revision.ensure_null(self.last_revision())
2765
if _mod_revision.is_null(last_revision):
2767
if last_revision not in self._lefthand_history(revision_id):
2768
raise errors.AppendRevisionsOnlyViolation(self.user_url)
2770
def _gen_revision_history(self):
2771
"""Generate the revision history from last revision
2773
last_revno, last_revision = self.last_revision_info()
2774
self._extend_partial_history(stop_index=last_revno-1)
2775
return list(reversed(self._partial_revision_history_cache))
2777
def _write_revision_history(self, history):
2778
"""Factored out of set_revision_history.
2780
This performs the actual writing to disk, with format-specific checks.
2781
It is intended to be called by BzrBranch5.set_revision_history.
2783
if len(history) == 0:
2784
last_revision = 'null:'
2786
if history != self._lefthand_history(history[-1]):
2787
raise errors.NotLefthandHistory(history)
2788
last_revision = history[-1]
2789
if self._get_append_revisions_only():
2790
self._check_history_violation(last_revision)
2791
self._write_last_revision_info(len(history), last_revision)
2794
def _set_parent_location(self, url):
2795
"""Set the parent branch"""
2796
self._set_config_location('parent_location', url, make_relative=True)
2799
def _get_parent_location(self):
2800
"""Set the parent branch"""
2801
return self._get_config_location('parent_location')
2804
def _set_all_reference_info(self, info_dict):
2805
"""Replace all reference info stored in a branch.
2807
:param info_dict: A dict of {file_id: (tree_path, branch_location)}
2810
writer = rio.RioWriter(s)
2811
for key, (tree_path, branch_location) in info_dict.iteritems():
2812
stanza = rio.Stanza(file_id=key, tree_path=tree_path,
2813
branch_location=branch_location)
2814
writer.write_stanza(stanza)
2815
self._transport.put_bytes('references', s.getvalue())
2816
self._reference_info = info_dict
2819
def _get_all_reference_info(self):
2820
"""Return all the reference info stored in a branch.
2822
:return: A dict of {file_id: (tree_path, branch_location)}
2824
if self._reference_info is not None:
2825
return self._reference_info
2826
rio_file = self._transport.get('references')
2828
stanzas = rio.read_stanzas(rio_file)
2829
info_dict = dict((s['file_id'], (s['tree_path'],
2830
s['branch_location'])) for s in stanzas)
2833
self._reference_info = info_dict
2836
def set_reference_info(self, file_id, tree_path, branch_location):
2837
"""Set the branch location to use for a tree reference.
2839
:param file_id: The file-id of the tree reference.
2840
:param tree_path: The path of the tree reference in the tree.
2841
:param branch_location: The location of the branch to retrieve tree
2844
info_dict = self._get_all_reference_info()
2845
info_dict[file_id] = (tree_path, branch_location)
2846
if None in (tree_path, branch_location):
2847
if tree_path is not None:
2848
raise ValueError('tree_path must be None when branch_location'
2850
if branch_location is not None:
2851
raise ValueError('branch_location must be None when tree_path'
2853
del info_dict[file_id]
2854
self._set_all_reference_info(info_dict)
2856
def get_reference_info(self, file_id):
2857
"""Get the tree_path and branch_location for a tree reference.
2859
:return: a tuple of (tree_path, branch_location)
2861
return self._get_all_reference_info().get(file_id, (None, None))
2863
def reference_parent(self, file_id, path, possible_transports=None):
2864
"""Return the parent branch for a tree-reference file_id.
2866
:param file_id: The file_id of the tree reference
2867
:param path: The path of the file_id in the tree
2868
:return: A branch associated with the file_id
2870
branch_location = self.get_reference_info(file_id)[1]
2871
if branch_location is None:
2872
return Branch.reference_parent(self, file_id, path,
2873
possible_transports)
2874
branch_location = urlutils.join(self.user_url, branch_location)
2875
return Branch.open(branch_location,
2876
possible_transports=possible_transports)
2878
def set_push_location(self, location):
2879
"""See Branch.set_push_location."""
2880
self._set_config_location('push_location', location)
2882
def set_bound_location(self, location):
2883
"""See Branch.set_push_location."""
2885
config = self.get_config()
2886
if location is None:
2887
if config.get_user_option('bound') != 'True':
2890
config.set_user_option('bound', 'False', warn_masked=True)
2893
self._set_config_location('bound_location', location,
2895
config.set_user_option('bound', 'True', warn_masked=True)
2898
def _get_bound_location(self, bound):
2899
"""Return the bound location in the config file.
2901
Return None if the bound parameter does not match"""
2902
config = self.get_config()
2903
config_bound = (config.get_user_option('bound') == 'True')
2904
if config_bound != bound:
2906
return self._get_config_location('bound_location', config=config)
2908
def get_bound_location(self):
2909
"""See Branch.set_push_location."""
2910
return self._get_bound_location(True)
2912
def get_old_bound_location(self):
2913
"""See Branch.get_old_bound_location"""
2914
return self._get_bound_location(False)
2916
def get_stacked_on_url(self):
2917
# you can always ask for the URL; but you might not be able to use it
2918
# if the repo can't support stacking.
2919
## self._check_stackable_repo()
2920
stacked_url = self._get_config_location('stacked_on_location')
2921
if stacked_url is None:
2922
raise errors.NotStacked(self)
2925
def _get_append_revisions_only(self):
2926
return self.get_config(
2927
).get_user_option_as_bool('append_revisions_only')
2930
def generate_revision_history(self, revision_id, last_rev=None,
2932
"""See BzrBranch5.generate_revision_history"""
2933
history = self._lefthand_history(revision_id, last_rev, other_branch)
2934
revno = len(history)
2935
self.set_last_revision_info(revno, revision_id)
2938
def get_rev_id(self, revno, history=None):
2939
"""Find the revision id of the specified revno."""
2941
return _mod_revision.NULL_REVISION
2943
last_revno, last_revision_id = self.last_revision_info()
2944
if revno <= 0 or revno > last_revno:
2945
raise errors.NoSuchRevision(self, revno)
2947
if history is not None:
2948
return history[revno - 1]
2950
index = last_revno - revno
2951
if len(self._partial_revision_history_cache) <= index:
2952
self._extend_partial_history(stop_index=index)
2953
if len(self._partial_revision_history_cache) > index:
2954
return self._partial_revision_history_cache[index]
2956
raise errors.NoSuchRevision(self, revno)
2959
def revision_id_to_revno(self, revision_id):
2960
"""Given a revision id, return its revno"""
2961
if _mod_revision.is_null(revision_id):
2964
index = self._partial_revision_history_cache.index(revision_id)
2966
self._extend_partial_history(stop_revision=revision_id)
2967
index = len(self._partial_revision_history_cache) - 1
2968
if self._partial_revision_history_cache[index] != revision_id:
2969
raise errors.NoSuchRevision(self, revision_id)
2970
return self.revno() - index
2973
class BzrBranch7(BzrBranch8):
2974
"""A branch with support for a fallback repository."""
2976
def set_reference_info(self, file_id, tree_path, branch_location):
2977
Branch.set_reference_info(self, file_id, tree_path, branch_location)
2979
def get_reference_info(self, file_id):
2980
Branch.get_reference_info(self, file_id)
2982
def reference_parent(self, file_id, path, possible_transports=None):
2983
return Branch.reference_parent(self, file_id, path,
2984
possible_transports)
2987
class BzrBranch6(BzrBranch7):
2988
"""See BzrBranchFormat6 for the capabilities of this branch.
2990
This subclass of BzrBranch7 disables the new features BzrBranch7 added,
2994
def get_stacked_on_url(self):
2995
raise errors.UnstackableBranchFormat(self._format, self.user_url)
2998
######################################################################
2999
# results of operations
3002
class _Result(object):
3004
def _show_tag_conficts(self, to_file):
3005
if not getattr(self, 'tag_conflicts', None):
3007
to_file.write('Conflicting tags:\n')
3008
for name, value1, value2 in self.tag_conflicts:
3009
to_file.write(' %s\n' % (name, ))
3012
class PullResult(_Result):
3013
"""Result of a Branch.pull operation.
3015
:ivar old_revno: Revision number before pull.
3016
:ivar new_revno: Revision number after pull.
3017
:ivar old_revid: Tip revision id before pull.
3018
:ivar new_revid: Tip revision id after pull.
3019
:ivar source_branch: Source (local) branch object. (read locked)
3020
:ivar master_branch: Master branch of the target, or the target if no
3022
:ivar local_branch: target branch if there is a Master, else None
3023
:ivar target_branch: Target/destination branch object. (write locked)
3024
:ivar tag_conflicts: A list of tag conflicts, see BasicTags.merge_to
3028
# DEPRECATED: pull used to return the change in revno
3029
return self.new_revno - self.old_revno
3031
def report(self, to_file):
3033
if self.old_revid == self.new_revid:
3034
to_file.write('No revisions to pull.\n')
3036
to_file.write('Now on revision %d.\n' % self.new_revno)
3037
self._show_tag_conficts(to_file)
3040
class BranchPushResult(_Result):
3041
"""Result of a Branch.push operation.
3043
:ivar old_revno: Revision number (eg 10) of the target before push.
3044
:ivar new_revno: Revision number (eg 12) of the target after push.
3045
:ivar old_revid: Tip revision id (eg joe@foo.com-1234234-aoeua34) of target
3047
:ivar new_revid: Tip revision id (eg joe@foo.com-5676566-boa234a) of target
3049
:ivar source_branch: Source branch object that the push was from. This is
3050
read locked, and generally is a local (and thus low latency) branch.
3051
:ivar master_branch: If target is a bound branch, the master branch of
3052
target, or target itself. Always write locked.
3053
:ivar target_branch: The direct Branch where data is being sent (write
3055
:ivar local_branch: If the target is a bound branch this will be the
3056
target, otherwise it will be None.
3060
# DEPRECATED: push used to return the change in revno
3061
return self.new_revno - self.old_revno
3063
def report(self, to_file):
3064
"""Write a human-readable description of the result."""
3065
if self.old_revid == self.new_revid:
3066
note('No new revisions to push.')
3068
note('Pushed up to revision %d.' % self.new_revno)
3069
self._show_tag_conficts(to_file)
3072
class BranchCheckResult(object):
3073
"""Results of checking branch consistency.
3078
def __init__(self, branch):
3079
self.branch = branch
3082
def report_results(self, verbose):
3083
"""Report the check results via trace.note.
3085
:param verbose: Requests more detailed display of what was checked,
3088
note('checked branch %s format %s', self.branch.user_url,
3089
self.branch._format)
3090
for error in self.errors:
3091
note('found error:%s', error)
3094
class Converter5to6(object):
3095
"""Perform an in-place upgrade of format 5 to format 6"""
3097
def convert(self, branch):
3098
# Data for 5 and 6 can peacefully coexist.
3099
format = BzrBranchFormat6()
3100
new_branch = format.open(branch.bzrdir, _found=True)
3102
# Copy source data into target
3103
new_branch._write_last_revision_info(*branch.last_revision_info())
3104
new_branch.set_parent(branch.get_parent())
3105
new_branch.set_bound_location(branch.get_bound_location())
3106
new_branch.set_push_location(branch.get_push_location())
3108
# New branch has no tags by default
3109
new_branch.tags._set_tag_dict({})
3111
# Copying done; now update target format
3112
new_branch._transport.put_bytes('format',
3113
format.get_format_string(),
3114
mode=new_branch.bzrdir._get_file_mode())
3116
# Clean up old files
3117
new_branch._transport.delete('revision-history')
3119
branch.set_parent(None)
3120
except errors.NoSuchFile:
3122
branch.set_bound_location(None)
3125
class Converter6to7(object):
3126
"""Perform an in-place upgrade of format 6 to format 7"""
3128
def convert(self, branch):
3129
format = BzrBranchFormat7()
3130
branch._set_config_location('stacked_on_location', '')
3131
# update target format
3132
branch._transport.put_bytes('format', format.get_format_string())
3135
class Converter7to8(object):
3136
"""Perform an in-place upgrade of format 6 to format 7"""
3138
def convert(self, branch):
3139
format = BzrBranchFormat8()
3140
branch._transport.put_bytes('references', '')
3141
# update target format
3142
branch._transport.put_bytes('format', format.get_format_string())
3145
def _run_with_write_locked_target(target, callable, *args, **kwargs):
3146
"""Run ``callable(*args, **kwargs)``, write-locking target for the
3149
_run_with_write_locked_target will attempt to release the lock it acquires.
3151
If an exception is raised by callable, then that exception *will* be
3152
propagated, even if the unlock attempt raises its own error. Thus
3153
_run_with_write_locked_target should be preferred to simply doing::
3157
return callable(*args, **kwargs)
3162
# This is very similar to bzrlib.decorators.needs_write_lock. Perhaps they
3163
# should share code?
3166
result = callable(*args, **kwargs)
3168
exc_info = sys.exc_info()
3172
raise exc_info[0], exc_info[1], exc_info[2]
3178
class InterBranch(InterObject):
3179
"""This class represents operations taking place between two branches.
3181
Its instances have methods like pull() and push() and contain
3182
references to the source and target repositories these operations
3183
can be carried out on.
3187
"""The available optimised InterBranch types."""
3190
def _get_branch_formats_to_test():
3191
"""Return a tuple with the Branch formats to use when testing."""
3192
raise NotImplementedError(InterBranch._get_branch_formats_to_test)
3194
def pull(self, overwrite=False, stop_revision=None,
3195
possible_transports=None, local=False):
3196
"""Mirror source into target branch.
3198
The target branch is considered to be 'local', having low latency.
3200
:returns: PullResult instance
3202
raise NotImplementedError(self.pull)
3204
def update_revisions(self, stop_revision=None, overwrite=False,
3206
"""Pull in new perfect-fit revisions.
3208
:param stop_revision: Updated until the given revision
3209
:param overwrite: Always set the branch pointer, rather than checking
3210
to see if it is a proper descendant.
3211
:param graph: A Graph object that can be used to query history
3212
information. This can be None.
3215
raise NotImplementedError(self.update_revisions)
3217
def push(self, overwrite=False, stop_revision=None,
3218
_override_hook_source_branch=None):
3219
"""Mirror the source branch into the target branch.
3221
The source branch is considered to be 'local', having low latency.
3223
raise NotImplementedError(self.push)
3226
class GenericInterBranch(InterBranch):
3227
"""InterBranch implementation that uses public Branch functions.
3231
def _get_branch_formats_to_test():
3232
return BranchFormat._default_format, BranchFormat._default_format
3234
def update_revisions(self, stop_revision=None, overwrite=False,
3236
"""See InterBranch.update_revisions()."""
3237
self.source.lock_read()
3239
other_revno, other_last_revision = self.source.last_revision_info()
3240
stop_revno = None # unknown
3241
if stop_revision is None:
3242
stop_revision = other_last_revision
3243
if _mod_revision.is_null(stop_revision):
3244
# if there are no commits, we're done.
3246
stop_revno = other_revno
3248
# what's the current last revision, before we fetch [and change it
3250
last_rev = _mod_revision.ensure_null(self.target.last_revision())
3251
# we fetch here so that we don't process data twice in the common
3252
# case of having something to pull, and so that the check for
3253
# already merged can operate on the just fetched graph, which will
3254
# be cached in memory.
3255
self.target.fetch(self.source, stop_revision)
3256
# Check to see if one is an ancestor of the other
3259
graph = self.target.repository.get_graph()
3260
if self.target._check_if_descendant_or_diverged(
3261
stop_revision, last_rev, graph, self.source):
3262
# stop_revision is a descendant of last_rev, but we aren't
3263
# overwriting, so we're done.
3265
if stop_revno is None:
3267
graph = self.target.repository.get_graph()
3268
this_revno, this_last_revision = \
3269
self.target.last_revision_info()
3270
stop_revno = graph.find_distance_to_null(stop_revision,
3271
[(other_last_revision, other_revno),
3272
(this_last_revision, this_revno)])
3273
self.target.set_last_revision_info(stop_revno, stop_revision)
3275
self.source.unlock()
3277
def pull(self, overwrite=False, stop_revision=None,
3278
possible_transports=None, _hook_master=None, run_hooks=True,
3279
_override_hook_target=None, local=False):
3282
:param _hook_master: Private parameter - set the branch to
3283
be supplied as the master to pull hooks.
3284
:param run_hooks: Private parameter - if false, this branch
3285
is being called because it's the master of the primary branch,
3286
so it should not run its hooks.
3287
:param _override_hook_target: Private parameter - set the branch to be
3288
supplied as the target_branch to pull hooks.
3289
:param local: Only update the local branch, and not the bound branch.
3291
# This type of branch can't be bound.
3293
raise errors.LocalRequiresBoundBranch()
3294
result = PullResult()
3295
result.source_branch = self.source
3296
if _override_hook_target is None:
3297
result.target_branch = self.target
3299
result.target_branch = _override_hook_target
3300
self.source.lock_read()
3302
# We assume that during 'pull' the target repository is closer than
3304
self.source.update_references(self.target)
3305
graph = self.target.repository.get_graph(self.source.repository)
3306
# TODO: Branch formats should have a flag that indicates
3307
# that revno's are expensive, and pull() should honor that flag.
3309
result.old_revno, result.old_revid = \
3310
self.target.last_revision_info()
3311
self.target.update_revisions(self.source, stop_revision,
3312
overwrite=overwrite, graph=graph)
3313
# TODO: The old revid should be specified when merging tags,
3314
# so a tags implementation that versions tags can only
3315
# pull in the most recent changes. -- JRV20090506
3316
result.tag_conflicts = self.source.tags.merge_to(self.target.tags,
3318
result.new_revno, result.new_revid = self.target.last_revision_info()
3320
result.master_branch = _hook_master
3321
result.local_branch = result.target_branch
3323
result.master_branch = result.target_branch
3324
result.local_branch = None
3326
for hook in Branch.hooks['post_pull']:
3329
self.source.unlock()
3332
def push(self, overwrite=False, stop_revision=None,
3333
_override_hook_source_branch=None):
3334
"""See InterBranch.push.
3336
This is the basic concrete implementation of push()
3338
:param _override_hook_source_branch: If specified, run
3339
the hooks passing this Branch as the source, rather than self.
3340
This is for use of RemoteBranch, where push is delegated to the
3341
underlying vfs-based Branch.
3343
# TODO: Public option to disable running hooks - should be trivial but
3345
self.source.lock_read()
3347
return _run_with_write_locked_target(
3348
self.target, self._push_with_bound_branches, overwrite,
3350
_override_hook_source_branch=_override_hook_source_branch)
3352
self.source.unlock()
3354
def _push_with_bound_branches(self, overwrite, stop_revision,
3355
_override_hook_source_branch=None):
3356
"""Push from source into target, and into target's master if any.
3359
if _override_hook_source_branch:
3360
result.source_branch = _override_hook_source_branch
3361
for hook in Branch.hooks['post_push']:
3364
bound_location = self.target.get_bound_location()
3365
if bound_location and self.target.base != bound_location:
3366
# there is a master branch.
3368
# XXX: Why the second check? Is it even supported for a branch to
3369
# be bound to itself? -- mbp 20070507
3370
master_branch = self.target.get_master_branch()
3371
master_branch.lock_write()
3373
# push into the master from the source branch.
3374
self.source._basic_push(master_branch, overwrite, stop_revision)
3375
# and push into the target branch from the source. Note that we
3376
# push from the source branch again, because its considered the
3377
# highest bandwidth repository.
3378
result = self.source._basic_push(self.target, overwrite,
3380
result.master_branch = master_branch
3381
result.local_branch = self.target
3385
master_branch.unlock()
3388
result = self.source._basic_push(self.target, overwrite,
3390
# TODO: Why set master_branch and local_branch if there's no
3391
# binding? Maybe cleaner to just leave them unset? -- mbp
3393
result.master_branch = self.target
3394
result.local_branch = None
3399
def is_compatible(self, source, target):
3400
# GenericBranch uses the public API, so always compatible
3404
class InterToBranch5(GenericInterBranch):
3407
def _get_branch_formats_to_test():
3408
return BranchFormat._default_format, BzrBranchFormat5()
3410
def pull(self, overwrite=False, stop_revision=None,
3411
possible_transports=None, run_hooks=True,
3412
_override_hook_target=None, local=False):
3413
"""Pull from source into self, updating my master if any.
3415
:param run_hooks: Private parameter - if false, this branch
3416
is being called because it's the master of the primary branch,
3417
so it should not run its hooks.
3419
bound_location = self.target.get_bound_location()
3420
if local and not bound_location:
3421
raise errors.LocalRequiresBoundBranch()
3422
master_branch = None
3423
if not local and bound_location and self.source.user_url != bound_location:
3424
# not pulling from master, so we need to update master.
3425
master_branch = self.target.get_master_branch(possible_transports)
3426
master_branch.lock_write()
3429
# pull from source into master.
3430
master_branch.pull(self.source, overwrite, stop_revision,
3432
return super(InterToBranch5, self).pull(overwrite,
3433
stop_revision, _hook_master=master_branch,
3434
run_hooks=run_hooks,
3435
_override_hook_target=_override_hook_target)
3438
master_branch.unlock()
3441
InterBranch.register_optimiser(GenericInterBranch)
3442
InterBranch.register_optimiser(InterToBranch5)
added
removed
bzrlib/branch.py
