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# Copyright (C) 2005, 2006, 2007, 2008, 2009 Canonical Ltd
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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from bzrlib.lazy_import import lazy_import
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lazy_import(globals(), """
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from itertools import chain
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config as _mod_config,
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revision as _mod_revision,
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from bzrlib.config import BranchConfig, TransportConfig
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from bzrlib.repofmt.pack_repo import RepositoryFormatKnitPack5RichRoot
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from bzrlib.tag import (
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from bzrlib.decorators import needs_read_lock, needs_write_lock
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from bzrlib.hooks import HookPoint, Hooks
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from bzrlib.inter import InterObject
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from bzrlib import registry
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from bzrlib.symbol_versioning import (
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from bzrlib.trace import mutter, mutter_callsite, note, is_quiet
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BZR_BRANCH_FORMAT_4 = "Bazaar-NG branch, format 0.0.4\n"
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BZR_BRANCH_FORMAT_5 = "Bazaar-NG branch, format 5\n"
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BZR_BRANCH_FORMAT_6 = "Bazaar Branch Format 6 (bzr 0.15)\n"
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# TODO: Maybe include checks for common corruption of newlines, etc?
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# TODO: Some operations like log might retrieve the same revisions
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# repeatedly to calculate deltas. We could perhaps have a weakref
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# cache in memory to make this faster. In general anything can be
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# cached in memory between lock and unlock operations. .. nb thats
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# what the transaction identity map provides
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######################################################################
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"""Branch holding a history of revisions.
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Base directory/url of the branch.
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hooks: An instance of BranchHooks.
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# this is really an instance variable - FIXME move it there
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def __init__(self, *ignored, **ignored_too):
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self.tags = self._format.make_tags(self)
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self._revision_history_cache = None
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self._revision_id_to_revno_cache = None
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self._partial_revision_id_to_revno_cache = {}
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self._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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"""Called by init to allow simpler extension of the base class."""
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def _activate_fallback_location(self, url, lock_style):
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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 lock_style == 'write':
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elif lock_style == 'read':
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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 open(base, _unsupported=False, possible_transports=None):
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"""Open the branch rooted at base.
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For instance, if the branch is at URL/.bzr/branch,
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Branch.open(URL) -> a Branch instance.
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control = bzrdir.BzrDir.open(base, _unsupported,
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possible_transports=possible_transports)
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return control.open_branch(_unsupported)
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def open_from_transport(transport, _unsupported=False):
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"""Open the branch rooted at transport"""
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control = bzrdir.BzrDir.open_from_transport(transport, _unsupported)
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return control.open_branch(_unsupported)
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def open_containing(url, possible_transports=None):
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"""Open an existing branch which contains url.
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This probes for a branch at url, and searches upwards from there.
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Basically we keep looking up until we find the control directory or
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run into the root. If there isn't one, raises NotBranchError.
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If there is one and it is either an unrecognised format or an unsupported
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format, UnknownFormatError or UnsupportedFormatError are raised.
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If there is one, it is returned, along with the unused portion of url.
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control, relpath = bzrdir.BzrDir.open_containing(url,
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return control.open_branch(), relpath
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def _push_should_merge_tags(self):
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"""Should _basic_push merge this branch's tags into the target?
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The default implementation returns False if this branch has no tags,
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and True the rest of the time. Subclasses may override this.
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return self.supports_tags() and self.tags.get_tag_dict()
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def get_config(self):
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return BranchConfig(self)
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def _get_config(self):
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"""Get the concrete config for just the config in this branch.
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This is not intended for client use; see Branch.get_config for the
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:return: An object supporting get_option and set_option.
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raise NotImplementedError(self._get_config)
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def _get_fallback_repository(self, url):
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"""Get the repository we fallback to at url."""
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url = urlutils.join(self.base, url)
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a_bzrdir = bzrdir.BzrDir.open(url,
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possible_transports=[self.bzrdir.root_transport])
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return a_bzrdir.open_branch().repository
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def _get_tags_bytes(self):
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"""Get the bytes of a serialised tags dict.
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Note that not all branches support tags, nor do all use the same tags
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logic: this method is specific to BasicTags. Other tag implementations
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may use the same method name and behave differently, safely, because
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of the double-dispatch via
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format.make_tags->tags_instance->get_tags_dict.
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:return: The bytes of the tags file.
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:seealso: Branch._set_tags_bytes.
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return self._transport.get_bytes('tags')
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def _get_nick(self, local=False, possible_transports=None):
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config = self.get_config()
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# explicit overrides master, but don't look for master if local is True
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if not local and not config.has_explicit_nickname():
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master = self.get_master_branch(possible_transports)
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if master is not None:
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# return the master branch value
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except errors.BzrError, e:
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# Silently fall back to local implicit nick if the master is
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mutter("Could not connect to bound branch, "
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"falling back to local nick.\n " + str(e))
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return config.get_nickname()
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def _set_nick(self, nick):
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self.get_config().set_user_option('nickname', nick, warn_masked=True)
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nick = property(_get_nick, _set_nick)
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raise NotImplementedError(self.is_locked)
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def _lefthand_history(self, revision_id, last_rev=None,
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if 'evil' in debug.debug_flags:
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mutter_callsite(4, "_lefthand_history scales with history.")
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# stop_revision must be a descendant of last_revision
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graph = self.repository.get_graph()
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if last_rev is not None:
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if not graph.is_ancestor(last_rev, revision_id):
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# our previous tip is not merged into stop_revision
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raise errors.DivergedBranches(self, other_branch)
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# make a new revision history from the graph
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parents_map = graph.get_parent_map([revision_id])
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if revision_id not in parents_map:
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raise errors.NoSuchRevision(self, revision_id)
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current_rev_id = revision_id
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check_not_reserved_id = _mod_revision.check_not_reserved_id
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# Do not include ghosts or graph origin in revision_history
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while (current_rev_id in parents_map and
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len(parents_map[current_rev_id]) > 0):
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check_not_reserved_id(current_rev_id)
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new_history.append(current_rev_id)
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current_rev_id = parents_map[current_rev_id][0]
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parents_map = graph.get_parent_map([current_rev_id])
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new_history.reverse()
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def lock_write(self):
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raise NotImplementedError(self.lock_write)
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raise NotImplementedError(self.lock_read)
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raise NotImplementedError(self.unlock)
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def peek_lock_mode(self):
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"""Return lock mode for the Branch: 'r', 'w' or None"""
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raise NotImplementedError(self.peek_lock_mode)
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def get_physical_lock_status(self):
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raise NotImplementedError(self.get_physical_lock_status)
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def dotted_revno_to_revision_id(self, revno, _cache_reverse=False):
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"""Return the revision_id for a dotted revno.
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:param revno: a tuple like (1,) or (1,1,2)
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:param _cache_reverse: a private parameter enabling storage
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of the reverse mapping in a top level cache. (This should
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only be done in selective circumstances as we want to
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avoid having the mapping cached multiple times.)
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:return: the revision_id
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:raises errors.NoSuchRevision: if the revno doesn't exist
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rev_id = self._do_dotted_revno_to_revision_id(revno)
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self._partial_revision_id_to_revno_cache[rev_id] = revno
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def _do_dotted_revno_to_revision_id(self, revno):
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"""Worker function for dotted_revno_to_revision_id.
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Subclasses should override this if they wish to
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provide a more efficient implementation.
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return self.get_rev_id(revno[0])
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revision_id_to_revno = self.get_revision_id_to_revno_map()
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revision_ids = [revision_id for revision_id, this_revno
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in revision_id_to_revno.iteritems()
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if revno == this_revno]
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if len(revision_ids) == 1:
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return revision_ids[0]
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revno_str = '.'.join(map(str, revno))
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raise errors.NoSuchRevision(self, revno_str)
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def revision_id_to_dotted_revno(self, revision_id):
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"""Given a revision id, return its dotted revno.
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:return: a tuple like (1,) or (400,1,3).
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return self._do_revision_id_to_dotted_revno(revision_id)
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def _do_revision_id_to_dotted_revno(self, revision_id):
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"""Worker function for revision_id_to_revno."""
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# Try the caches if they are loaded
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result = self._partial_revision_id_to_revno_cache.get(revision_id)
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if result is not None:
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if self._revision_id_to_revno_cache:
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result = self._revision_id_to_revno_cache.get(revision_id)
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raise errors.NoSuchRevision(self, revision_id)
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# Try the mainline as it's optimised
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revno = self.revision_id_to_revno(revision_id)
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except errors.NoSuchRevision:
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# We need to load and use the full revno map after all
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result = self.get_revision_id_to_revno_map().get(revision_id)
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raise errors.NoSuchRevision(self, revision_id)
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def get_revision_id_to_revno_map(self):
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"""Return the revision_id => dotted revno map.
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This will be regenerated on demand, but will be cached.
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:return: A dictionary mapping revision_id => dotted revno.
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This dictionary should not be modified by the caller.
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if self._revision_id_to_revno_cache is not None:
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mapping = self._revision_id_to_revno_cache
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mapping = self._gen_revno_map()
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self._cache_revision_id_to_revno(mapping)
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# TODO: jam 20070417 Since this is being cached, should we be returning
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# I would rather not, and instead just declare that users should not
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# modify the return value.
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def _gen_revno_map(self):
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"""Create a new mapping from revision ids to dotted revnos.
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Dotted revnos are generated based on the current tip in the revision
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This is the worker function for get_revision_id_to_revno_map, which
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just caches the return value.
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:return: A dictionary mapping revision_id => dotted revno.
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revision_id_to_revno = dict((rev_id, revno)
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for rev_id, depth, revno, end_of_merge
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in self.iter_merge_sorted_revisions())
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return revision_id_to_revno
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def iter_merge_sorted_revisions(self, start_revision_id=None,
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stop_revision_id=None, stop_rule='exclude', direction='reverse'):
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"""Walk the revisions for a branch in merge sorted order.
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Merge sorted order is the output from a merge-aware,
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topological sort, i.e. all parents come before their
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children going forward; the opposite for reverse.
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:param start_revision_id: the revision_id to begin walking from.
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If None, the branch tip is used.
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:param stop_revision_id: the revision_id to terminate the walk
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after. If None, the rest of history is included.
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:param stop_rule: if stop_revision_id is not None, the precise rule
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to use for termination:
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* 'exclude' - leave the stop revision out of the result (default)
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* 'include' - the stop revision is the last item in the result
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* 'with-merges' - include the stop revision and all of its
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merged revisions in the result
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:param direction: either 'reverse' or 'forward':
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* reverse means return the start_revision_id first, i.e.
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start at the most recent revision and go backwards in history
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* forward returns tuples in the opposite order to reverse.
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Note in particular that forward does *not* do any intelligent
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ordering w.r.t. depth as some clients of this API may like.
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(If required, that ought to be done at higher layers.)
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:return: an iterator over (revision_id, depth, revno, end_of_merge)
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* revision_id: the unique id of the revision
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* depth: How many levels of merging deep this node has been
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* revno_sequence: This field provides a sequence of
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revision numbers for all revisions. The format is:
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(REVNO, BRANCHNUM, BRANCHREVNO). BRANCHNUM is the number of the
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branch that the revno is on. From left to right the REVNO numbers
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are the sequence numbers within that branch of the revision.
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* end_of_merge: When True the next node (earlier in history) is
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part of a different merge.
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# Note: depth and revno values are in the context of the branch so
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# we need the full graph to get stable numbers, regardless of the
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if self._merge_sorted_revisions_cache is None:
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last_revision = self.last_revision()
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graph = self.repository.get_graph()
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parent_map = dict(((key, value) for key, value in
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graph.iter_ancestry([last_revision]) if value is not None))
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revision_graph = repository._strip_NULL_ghosts(parent_map)
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revs = tsort.merge_sort(revision_graph, last_revision, None,
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# Drop the sequence # before caching
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self._merge_sorted_revisions_cache = [r[1:] for r in revs]
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filtered = self._filter_merge_sorted_revisions(
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self._merge_sorted_revisions_cache, start_revision_id,
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stop_revision_id, stop_rule)
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if direction == 'reverse':
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if direction == 'forward':
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return reversed(list(filtered))
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raise ValueError('invalid direction %r' % direction)
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def _filter_merge_sorted_revisions(self, merge_sorted_revisions,
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start_revision_id, stop_revision_id, stop_rule):
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"""Iterate over an inclusive range of sorted revisions."""
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rev_iter = iter(merge_sorted_revisions)
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if start_revision_id is not None:
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for rev_id, depth, revno, end_of_merge in rev_iter:
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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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iter([(rev_id, depth, revno, end_of_merge)]),
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if stop_revision_id is None:
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for rev_id, depth, revno, end_of_merge in rev_iter:
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yield rev_id, depth, revno, end_of_merge
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elif stop_rule == 'exclude':
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for rev_id, depth, revno, end_of_merge in rev_iter:
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if rev_id == stop_revision_id:
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yield rev_id, depth, revno, end_of_merge
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elif stop_rule == 'include':
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for rev_id, depth, revno, end_of_merge in rev_iter:
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yield rev_id, depth, revno, end_of_merge
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if rev_id == stop_revision_id:
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elif stop_rule == 'with-merges':
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stop_rev = self.repository.get_revision(stop_revision_id)
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if stop_rev.parent_ids:
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left_parent = stop_rev.parent_ids[0]
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left_parent = _mod_revision.NULL_REVISION
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for rev_id, depth, revno, end_of_merge in rev_iter:
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if rev_id == left_parent:
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yield rev_id, depth, revno, end_of_merge
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raise ValueError('invalid stop_rule %r' % stop_rule)
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def leave_lock_in_place(self):
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"""Tell this branch object not to release the physical lock when this
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If lock_write doesn't return a token, then this method is not supported.
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self.control_files.leave_in_place()
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def dont_leave_lock_in_place(self):
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"""Tell this branch object to release the physical lock when this
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object is unlocked, even if it didn't originally acquire it.
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If lock_write doesn't return a token, then this method is not supported.
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self.control_files.dont_leave_in_place()
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def bind(self, other):
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"""Bind the local branch the other branch.
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:param other: The branch to bind to
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raise errors.UpgradeRequired(self.base)
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def fetch(self, from_branch, last_revision=None, pb=None):
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"""Copy revisions from from_branch into this branch.
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:param from_branch: Where to copy from.
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:param last_revision: What revision to stop at (None for at the end
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:param pb: An optional progress bar to use.
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if self.base == from_branch.base:
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symbol_versioning.warn(
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symbol_versioning.deprecated_in((1, 14, 0))
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% "pb parameter to fetch()")
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from_branch.lock_read()
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if last_revision is None:
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last_revision = from_branch.last_revision()
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last_revision = _mod_revision.ensure_null(last_revision)
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return self.repository.fetch(from_branch.repository,
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revision_id=last_revision,
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def get_bound_location(self):
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"""Return the URL of the branch we are bound to.
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Older format branches cannot bind, please be sure to use a metadir
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def get_old_bound_location(self):
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"""Return the URL of the branch we used to be bound to
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raise errors.UpgradeRequired(self.base)
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def get_commit_builder(self, parents, config=None, timestamp=None,
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timezone=None, committer=None, revprops=None,
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"""Obtain a CommitBuilder for this branch.
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:param parents: Revision ids of the parents of the new revision.
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:param config: Optional configuration to use.
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:param timestamp: Optional timestamp recorded for commit.
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:param timezone: Optional timezone for timestamp.
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:param committer: Optional committer to set for commit.
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:param revprops: Optional dictionary of revision properties.
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:param revision_id: Optional revision id.
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config = self.get_config()
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return self.repository.get_commit_builder(self, parents, config,
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timestamp, timezone, committer, revprops, revision_id)
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def get_master_branch(self, possible_transports=None):
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"""Return the branch we are bound to.
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:return: Either a Branch, or None
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def get_revision_delta(self, revno):
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"""Return the delta for one revision.
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The delta is relative to its mainline predecessor, or the
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empty tree for revision 1.
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rh = self.revision_history()
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if not (1 <= revno <= len(rh)):
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raise errors.InvalidRevisionNumber(revno)
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return self.repository.get_revision_delta(rh[revno-1])
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def get_stacked_on_url(self):
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"""Get the URL this branch is stacked against.
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:raises NotStacked: If the branch is not stacked.
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:raises UnstackableBranchFormat: If the branch does not support
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raise NotImplementedError(self.get_stacked_on_url)
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def print_file(self, file, revision_id):
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"""Print `file` to stdout."""
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raise NotImplementedError(self.print_file)
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def set_revision_history(self, rev_history):
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raise NotImplementedError(self.set_revision_history)
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def set_parent(self, url):
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"""See Branch.set_parent."""
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# TODO: Maybe delete old location files?
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# URLs should never be unicode, even on the local fs,
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# FIXUP this and get_parent in a future branch format bump:
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# read and rewrite the file. RBC 20060125
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if isinstance(url, unicode):
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url = url.encode('ascii')
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except UnicodeEncodeError:
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raise errors.InvalidURL(url,
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"Urls must be 7-bit ascii, "
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"use bzrlib.urlutils.escape")
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url = urlutils.relative_url(self.base, url)
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self._set_parent_location(url)
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def set_stacked_on_url(self, url):
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"""Set the URL this branch is stacked against.
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:raises UnstackableBranchFormat: If the branch does not support
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:raises UnstackableRepositoryFormat: If the repository does not support
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if not self._format.supports_stacking():
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raise errors.UnstackableBranchFormat(self._format, self.base)
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self._check_stackable_repo()
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old_url = self.get_stacked_on_url()
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except (errors.NotStacked, errors.UnstackableBranchFormat,
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errors.UnstackableRepositoryFormat):
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# XXX: Lock correctness - should unlock our old repo if we were
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# repositories don't offer an interface to remove fallback
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# repositories today; take the conceptually simpler option and just
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self.repository = self.bzrdir.find_repository()
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self.repository.lock_write()
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# for every revision reference the branch has, ensure it is pulled
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source_repository = self._get_fallback_repository(old_url)
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for revision_id in chain([self.last_revision()],
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self.tags.get_reverse_tag_dict()):
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self.repository.fetch(source_repository, revision_id,
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self._activate_fallback_location(url, 'write')
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# write this out after the repository is stacked to avoid setting a
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# stacked config that doesn't work.
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self._set_config_location('stacked_on_location', url)
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def _set_tags_bytes(self, bytes):
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"""Mirror method for _get_tags_bytes.
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:seealso: Branch._get_tags_bytes.
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return _run_with_write_locked_target(self, self._transport.put_bytes,
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def _cache_revision_history(self, rev_history):
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"""Set the cached revision history to rev_history.
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The revision_history method will use this cache to avoid regenerating
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the revision history.
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This API is semi-public; it only for use by subclasses, all other code
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should consider it to be private.
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self._revision_history_cache = rev_history
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def _cache_revision_id_to_revno(self, revision_id_to_revno):
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"""Set the cached revision_id => revno map to revision_id_to_revno.
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This API is semi-public; it only for use by subclasses, all other code
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should consider it to be private.
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self._revision_id_to_revno_cache = revision_id_to_revno
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def _clear_cached_state(self):
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"""Clear any cached data on this branch, e.g. cached revision history.
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This means the next call to revision_history will need to call
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_gen_revision_history.
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This API is semi-public; it only for use by subclasses, all other code
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should consider it to be private.
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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._last_revision_info_cache = None
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self._merge_sorted_revisions_cache = None
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def _gen_revision_history(self):
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"""Return sequence of revision hashes on to this branch.
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Unlike revision_history, this method always regenerates or rereads the
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revision history, i.e. it does not cache the result, so repeated calls
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Concrete subclasses should override this instead of revision_history so
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that subclasses do not need to deal with caching logic.
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This API is semi-public; it only for use by subclasses, all other code
707
should consider it to be private.
709
raise NotImplementedError(self._gen_revision_history)
712
def revision_history(self):
713
"""Return sequence of revision ids on this branch.
715
This method will cache the revision history for as long as it is safe to
718
if 'evil' in debug.debug_flags:
719
mutter_callsite(3, "revision_history scales with history.")
720
if self._revision_history_cache is not None:
721
history = self._revision_history_cache
723
history = self._gen_revision_history()
724
self._cache_revision_history(history)
728
"""Return current revision number for this branch.
730
That is equivalent to the number of revisions committed to
733
return self.last_revision_info()[0]
736
"""Older format branches cannot bind or unbind."""
737
raise errors.UpgradeRequired(self.base)
739
def set_append_revisions_only(self, enabled):
740
"""Older format branches are never restricted to append-only"""
741
raise errors.UpgradeRequired(self.base)
743
def last_revision(self):
744
"""Return last revision id, or NULL_REVISION."""
745
return self.last_revision_info()[1]
748
def last_revision_info(self):
749
"""Return information about the last revision.
751
:return: A tuple (revno, revision_id).
753
if self._last_revision_info_cache is None:
754
self._last_revision_info_cache = self._last_revision_info()
755
return self._last_revision_info_cache
757
def _last_revision_info(self):
758
rh = self.revision_history()
761
return (revno, rh[-1])
763
return (0, _mod_revision.NULL_REVISION)
765
@deprecated_method(deprecated_in((1, 6, 0)))
766
def missing_revisions(self, other, stop_revision=None):
767
"""Return a list of new revisions that would perfectly fit.
769
If self and other have not diverged, return a list of the revisions
770
present in other, but missing from self.
772
self_history = self.revision_history()
773
self_len = len(self_history)
774
other_history = other.revision_history()
775
other_len = len(other_history)
776
common_index = min(self_len, other_len) -1
777
if common_index >= 0 and \
778
self_history[common_index] != other_history[common_index]:
779
raise errors.DivergedBranches(self, other)
781
if stop_revision is None:
782
stop_revision = other_len
784
if stop_revision > other_len:
785
raise errors.NoSuchRevision(self, stop_revision)
786
return other_history[self_len:stop_revision]
789
def update_revisions(self, other, stop_revision=None, overwrite=False,
791
"""Pull in new perfect-fit revisions.
793
:param other: Another Branch to pull from
794
:param stop_revision: Updated until the given revision
795
:param overwrite: Always set the branch pointer, rather than checking
796
to see if it is a proper descendant.
797
:param graph: A Graph object that can be used to query history
798
information. This can be None.
801
return InterBranch.get(other, self).update_revisions(stop_revision,
804
def import_last_revision_info(self, source_repo, revno, revid):
805
"""Set the last revision info, importing from another repo if necessary.
807
This is used by the bound branch code to upload a revision to
808
the master branch first before updating the tip of the local branch.
810
:param source_repo: Source repository to optionally fetch from
811
:param revno: Revision number of the new tip
812
:param revid: Revision id of the new tip
814
if not self.repository.has_same_location(source_repo):
815
self.repository.fetch(source_repo, revision_id=revid)
816
self.set_last_revision_info(revno, revid)
818
def revision_id_to_revno(self, revision_id):
819
"""Given a revision id, return its revno"""
820
if _mod_revision.is_null(revision_id):
822
history = self.revision_history()
824
return history.index(revision_id) + 1
826
raise errors.NoSuchRevision(self, revision_id)
828
def get_rev_id(self, revno, history=None):
829
"""Find the revision id of the specified revno."""
831
return _mod_revision.NULL_REVISION
833
history = self.revision_history()
834
if revno <= 0 or revno > len(history):
835
raise errors.NoSuchRevision(self, revno)
836
return history[revno - 1]
838
def pull(self, source, overwrite=False, stop_revision=None,
839
possible_transports=None, _override_hook_target=None):
840
"""Mirror source into this branch.
842
This branch is considered to be 'local', having low latency.
844
:returns: PullResult instance
846
raise NotImplementedError(self.pull)
848
def push(self, target, overwrite=False, stop_revision=None):
849
"""Mirror this branch into target.
851
This branch is considered to be 'local', having low latency.
853
raise NotImplementedError(self.push)
855
def basis_tree(self):
856
"""Return `Tree` object for last revision."""
857
return self.repository.revision_tree(self.last_revision())
859
def get_parent(self):
860
"""Return the parent location of the branch.
862
This is the default location for pull/missing. The usual
863
pattern is that the user can override it by specifying a
866
parent = self._get_parent_location()
869
# This is an old-format absolute path to a local branch
871
if parent.startswith('/'):
872
parent = urlutils.local_path_to_url(parent.decode('utf8'))
874
return urlutils.join(self.base[:-1], parent)
875
except errors.InvalidURLJoin, e:
876
raise errors.InaccessibleParent(parent, self.base)
878
def _get_parent_location(self):
879
raise NotImplementedError(self._get_parent_location)
881
def _set_config_location(self, name, url, config=None,
882
make_relative=False):
884
config = self.get_config()
888
url = urlutils.relative_url(self.base, url)
889
config.set_user_option(name, url, warn_masked=True)
891
def _get_config_location(self, name, config=None):
893
config = self.get_config()
894
location = config.get_user_option(name)
899
def get_submit_branch(self):
900
"""Return the submit location of the branch.
902
This is the default location for bundle. The usual
903
pattern is that the user can override it by specifying a
906
return self.get_config().get_user_option('submit_branch')
908
def set_submit_branch(self, location):
909
"""Return the submit location of the branch.
911
This is the default location for bundle. The usual
912
pattern is that the user can override it by specifying a
915
self.get_config().set_user_option('submit_branch', location,
918
def get_public_branch(self):
919
"""Return the public location of the branch.
921
This is used by merge directives.
923
return self._get_config_location('public_branch')
925
def set_public_branch(self, location):
926
"""Return the submit location of the branch.
928
This is the default location for bundle. The usual
929
pattern is that the user can override it by specifying a
932
self._set_config_location('public_branch', location)
934
def get_push_location(self):
935
"""Return the None or the location to push this branch to."""
936
push_loc = self.get_config().get_user_option('push_location')
939
def set_push_location(self, location):
940
"""Set a new push location for this branch."""
941
raise NotImplementedError(self.set_push_location)
943
def _run_post_change_branch_tip_hooks(self, old_revno, old_revid):
944
"""Run the post_change_branch_tip hooks."""
945
hooks = Branch.hooks['post_change_branch_tip']
948
new_revno, new_revid = self.last_revision_info()
949
params = ChangeBranchTipParams(
950
self, old_revno, new_revno, old_revid, new_revid)
954
def _run_pre_change_branch_tip_hooks(self, new_revno, new_revid):
955
"""Run the pre_change_branch_tip hooks."""
956
hooks = Branch.hooks['pre_change_branch_tip']
959
old_revno, old_revid = self.last_revision_info()
960
params = ChangeBranchTipParams(
961
self, old_revno, new_revno, old_revid, new_revid)
965
except errors.TipChangeRejected:
968
exc_info = sys.exc_info()
969
hook_name = Branch.hooks.get_hook_name(hook)
970
raise errors.HookFailed(
971
'pre_change_branch_tip', hook_name, exc_info)
975
"""Synchronise this branch with the master branch if any.
977
:return: None or the last_revision pivoted out during the update.
981
def check_revno(self, revno):
983
Check whether a revno corresponds to any revision.
984
Zero (the NULL revision) is considered valid.
987
self.check_real_revno(revno)
989
def check_real_revno(self, revno):
991
Check whether a revno corresponds to a real revision.
992
Zero (the NULL revision) is considered invalid
994
if revno < 1 or revno > self.revno():
995
raise errors.InvalidRevisionNumber(revno)
998
def clone(self, to_bzrdir, revision_id=None, repository_policy=None):
999
"""Clone this branch into to_bzrdir preserving all semantic values.
1001
Most API users will want 'create_clone_on_transport', which creates a
1002
new bzrdir and branch on the fly.
1004
revision_id: if not None, the revision history in the new branch will
1005
be truncated to end with revision_id.
1007
result = to_bzrdir.create_branch()
1010
if repository_policy is not None:
1011
repository_policy.configure_branch(result)
1012
self.copy_content_into(result, revision_id=revision_id)
1018
def sprout(self, to_bzrdir, revision_id=None, repository_policy=None):
1019
"""Create a new line of development from the branch, into to_bzrdir.
1021
to_bzrdir controls the branch format.
1023
revision_id: if not None, the revision history in the new branch will
1024
be truncated to end with revision_id.
1026
result = to_bzrdir.create_branch()
1029
if repository_policy is not None:
1030
repository_policy.configure_branch(result)
1031
self.copy_content_into(result, revision_id=revision_id)
1032
result.set_parent(self.bzrdir.root_transport.base)
1037
def _synchronize_history(self, destination, revision_id):
1038
"""Synchronize last revision and revision history between branches.
1040
This version is most efficient when the destination is also a
1041
BzrBranch6, but works for BzrBranch5, as long as the destination's
1042
repository contains all the lefthand ancestors of the intended
1043
last_revision. If not, set_last_revision_info will fail.
1045
:param destination: The branch to copy the history into
1046
:param revision_id: The revision-id to truncate history at. May
1047
be None to copy complete history.
1049
source_revno, source_revision_id = self.last_revision_info()
1050
if revision_id is None:
1051
revno, revision_id = source_revno, source_revision_id
1052
elif source_revision_id == revision_id:
1053
# we know the revno without needing to walk all of history
1054
revno = source_revno
1056
# To figure out the revno for a random revision, we need to build
1057
# the revision history, and count its length.
1058
# We don't care about the order, just how long it is.
1059
# Alternatively, we could start at the current location, and count
1060
# backwards. But there is no guarantee that we will find it since
1061
# it may be a merged revision.
1062
revno = len(list(self.repository.iter_reverse_revision_history(
1064
destination.set_last_revision_info(revno, revision_id)
1067
def copy_content_into(self, destination, revision_id=None):
1068
"""Copy the content of self into destination.
1070
revision_id: if not None, the revision history in the new branch will
1071
be truncated to end with revision_id.
1073
self._synchronize_history(destination, revision_id)
1075
parent = self.get_parent()
1076
except errors.InaccessibleParent, e:
1077
mutter('parent was not accessible to copy: %s', e)
1080
destination.set_parent(parent)
1081
if self._push_should_merge_tags():
1082
self.tags.merge_to(destination.tags)
1086
"""Check consistency of the branch.
1088
In particular this checks that revisions given in the revision-history
1089
do actually match up in the revision graph, and that they're all
1090
present in the repository.
1092
Callers will typically also want to check the repository.
1094
:return: A BranchCheckResult.
1096
mainline_parent_id = None
1097
last_revno, last_revision_id = self.last_revision_info()
1098
real_rev_history = list(self.repository.iter_reverse_revision_history(
1100
real_rev_history.reverse()
1101
if len(real_rev_history) != last_revno:
1102
raise errors.BzrCheckError('revno does not match len(mainline)'
1103
' %s != %s' % (last_revno, len(real_rev_history)))
1104
# TODO: We should probably also check that real_rev_history actually
1105
# matches self.revision_history()
1106
for revision_id in real_rev_history:
1108
revision = self.repository.get_revision(revision_id)
1109
except errors.NoSuchRevision, e:
1110
raise errors.BzrCheckError("mainline revision {%s} not in repository"
1112
# In general the first entry on the revision history has no parents.
1113
# But it's not illegal for it to have parents listed; this can happen
1114
# in imports from Arch when the parents weren't reachable.
1115
if mainline_parent_id is not None:
1116
if mainline_parent_id not in revision.parent_ids:
1117
raise errors.BzrCheckError("previous revision {%s} not listed among "
1119
% (mainline_parent_id, revision_id))
1120
mainline_parent_id = revision_id
1121
return BranchCheckResult(self)
1123
def _get_checkout_format(self):
1124
"""Return the most suitable metadir for a checkout of this branch.
1125
Weaves are used if this branch's repository uses weaves.
1127
if isinstance(self.bzrdir, bzrdir.BzrDirPreSplitOut):
1128
from bzrlib.repofmt import weaverepo
1129
format = bzrdir.BzrDirMetaFormat1()
1130
format.repository_format = weaverepo.RepositoryFormat7()
1132
format = self.repository.bzrdir.checkout_metadir()
1133
format.set_branch_format(self._format)
1136
def create_clone_on_transport(self, to_transport, revision_id=None,
1138
"""Create a clone of this branch and its bzrdir.
1140
:param to_transport: The transport to clone onto.
1141
:param revision_id: The revision id to use as tip in the new branch.
1142
If None the tip is obtained from this branch.
1143
:param stacked_on: An optional URL to stack the clone on.
1145
# XXX: Fix the bzrdir API to allow getting the branch back from the
1146
# clone call. Or something. 20090224 RBC/spiv.
1147
dir_to = self.bzrdir.clone_on_transport(to_transport,
1148
revision_id=revision_id, stacked_on=stacked_on)
1149
return dir_to.open_branch()
1151
def create_checkout(self, to_location, revision_id=None,
1152
lightweight=False, accelerator_tree=None,
1154
"""Create a checkout of a branch.
1156
:param to_location: The url to produce the checkout at
1157
:param revision_id: The revision to check out
1158
:param lightweight: If True, produce a lightweight checkout, otherwise,
1159
produce a bound branch (heavyweight checkout)
1160
:param accelerator_tree: A tree which can be used for retrieving file
1161
contents more quickly than the revision tree, i.e. a workingtree.
1162
The revision tree will be used for cases where accelerator_tree's
1163
content is different.
1164
:param hardlink: If true, hard-link files from accelerator_tree,
1166
:return: The tree of the created checkout
1168
t = transport.get_transport(to_location)
1171
format = self._get_checkout_format()
1172
checkout = format.initialize_on_transport(t)
1173
from_branch = BranchReferenceFormat().initialize(checkout, self)
1175
format = self._get_checkout_format()
1176
checkout_branch = bzrdir.BzrDir.create_branch_convenience(
1177
to_location, force_new_tree=False, format=format)
1178
checkout = checkout_branch.bzrdir
1179
checkout_branch.bind(self)
1180
# pull up to the specified revision_id to set the initial
1181
# branch tip correctly, and seed it with history.
1182
checkout_branch.pull(self, stop_revision=revision_id)
1184
tree = checkout.create_workingtree(revision_id,
1185
from_branch=from_branch,
1186
accelerator_tree=accelerator_tree,
1188
basis_tree = tree.basis_tree()
1189
basis_tree.lock_read()
1191
for path, file_id in basis_tree.iter_references():
1192
reference_parent = self.reference_parent(file_id, path)
1193
reference_parent.create_checkout(tree.abspath(path),
1194
basis_tree.get_reference_revision(file_id, path),
1201
def reconcile(self, thorough=True):
1202
"""Make sure the data stored in this branch is consistent."""
1203
from bzrlib.reconcile import BranchReconciler
1204
reconciler = BranchReconciler(self, thorough=thorough)
1205
reconciler.reconcile()
1208
def reference_parent(self, file_id, path):
1209
"""Return the parent branch for a tree-reference file_id
1210
:param file_id: The file_id of the tree reference
1211
:param path: The path of the file_id in the tree
1212
:return: A branch associated with the file_id
1214
# FIXME should provide multiple branches, based on config
1215
return Branch.open(self.bzrdir.root_transport.clone(path).base)
1217
def supports_tags(self):
1218
return self._format.supports_tags()
1220
def _check_if_descendant_or_diverged(self, revision_a, revision_b, graph,
1222
"""Ensure that revision_b is a descendant of revision_a.
1224
This is a helper function for update_revisions.
1226
:raises: DivergedBranches if revision_b has diverged from revision_a.
1227
:returns: True if revision_b is a descendant of revision_a.
1229
relation = self._revision_relations(revision_a, revision_b, graph)
1230
if relation == 'b_descends_from_a':
1232
elif relation == 'diverged':
1233
raise errors.DivergedBranches(self, other_branch)
1234
elif relation == 'a_descends_from_b':
1237
raise AssertionError("invalid relation: %r" % (relation,))
1239
def _revision_relations(self, revision_a, revision_b, graph):
1240
"""Determine the relationship between two revisions.
1242
:returns: One of: 'a_descends_from_b', 'b_descends_from_a', 'diverged'
1244
heads = graph.heads([revision_a, revision_b])
1245
if heads == set([revision_b]):
1246
return 'b_descends_from_a'
1247
elif heads == set([revision_a, revision_b]):
1248
# These branches have diverged
1250
elif heads == set([revision_a]):
1251
return 'a_descends_from_b'
1253
raise AssertionError("invalid heads: %r" % (heads,))
1256
class BranchFormat(object):
1257
"""An encapsulation of the initialization and open routines for a format.
1259
Formats provide three things:
1260
* An initialization routine,
1264
Formats are placed in an dict by their format string for reference
1265
during branch opening. Its not required that these be instances, they
1266
can be classes themselves with class methods - it simply depends on
1267
whether state is needed for a given format or not.
1269
Once a format is deprecated, just deprecate the initialize and open
1270
methods on the format class. Do not deprecate the object, as the
1271
object will be created every time regardless.
1274
_default_format = None
1275
"""The default format used for new branches."""
1278
"""The known formats."""
1280
def __eq__(self, other):
1281
return self.__class__ is other.__class__
1283
def __ne__(self, other):
1284
return not (self == other)
1287
def find_format(klass, a_bzrdir):
1288
"""Return the format for the branch object in a_bzrdir."""
1290
transport = a_bzrdir.get_branch_transport(None)
1291
format_string = transport.get("format").read()
1292
return klass._formats[format_string]
1293
except errors.NoSuchFile:
1294
raise errors.NotBranchError(path=transport.base)
1296
raise errors.UnknownFormatError(format=format_string, kind='branch')
1299
def get_default_format(klass):
1300
"""Return the current default format."""
1301
return klass._default_format
1303
def get_reference(self, a_bzrdir):
1304
"""Get the target reference of the branch in a_bzrdir.
1306
format probing must have been completed before calling
1307
this method - it is assumed that the format of the branch
1308
in a_bzrdir is correct.
1310
:param a_bzrdir: The bzrdir to get the branch data from.
1311
:return: None if the branch is not a reference branch.
1316
def set_reference(self, a_bzrdir, to_branch):
1317
"""Set the target reference of the branch in a_bzrdir.
1319
format probing must have been completed before calling
1320
this method - it is assumed that the format of the branch
1321
in a_bzrdir is correct.
1323
:param a_bzrdir: The bzrdir to set the branch reference for.
1324
:param to_branch: branch that the checkout is to reference
1326
raise NotImplementedError(self.set_reference)
1328
def get_format_string(self):
1329
"""Return the ASCII format string that identifies this format."""
1330
raise NotImplementedError(self.get_format_string)
1332
def get_format_description(self):
1333
"""Return the short format description for this format."""
1334
raise NotImplementedError(self.get_format_description)
1336
def _initialize_helper(self, a_bzrdir, utf8_files, lock_type='metadir',
1338
"""Initialize a branch in a bzrdir, with specified files
1340
:param a_bzrdir: The bzrdir to initialize the branch in
1341
:param utf8_files: The files to create as a list of
1342
(filename, content) tuples
1343
:param set_format: If True, set the format with
1344
self.get_format_string. (BzrBranch4 has its format set
1346
:return: a branch in this format
1348
mutter('creating branch %r in %s', self, a_bzrdir.transport.base)
1349
branch_transport = a_bzrdir.get_branch_transport(self)
1351
'metadir': ('lock', lockdir.LockDir),
1352
'branch4': ('branch-lock', lockable_files.TransportLock),
1354
lock_name, lock_class = lock_map[lock_type]
1355
control_files = lockable_files.LockableFiles(branch_transport,
1356
lock_name, lock_class)
1357
control_files.create_lock()
1358
control_files.lock_write()
1360
utf8_files += [('format', self.get_format_string())]
1362
for (filename, content) in utf8_files:
1363
branch_transport.put_bytes(
1365
mode=a_bzrdir._get_file_mode())
1367
control_files.unlock()
1368
return self.open(a_bzrdir, _found=True)
1370
def initialize(self, a_bzrdir):
1371
"""Create a branch of this format in a_bzrdir."""
1372
raise NotImplementedError(self.initialize)
1374
def is_supported(self):
1375
"""Is this format supported?
1377
Supported formats can be initialized and opened.
1378
Unsupported formats may not support initialization or committing or
1379
some other features depending on the reason for not being supported.
1383
def make_tags(self, branch):
1384
"""Create a tags object for branch.
1386
This method is on BranchFormat, because BranchFormats are reflected
1387
over the wire via network_name(), whereas full Branch instances require
1388
multiple VFS method calls to operate at all.
1390
The default implementation returns a disabled-tags instance.
1392
Note that it is normal for branch to be a RemoteBranch when using tags
1395
return DisabledTags(branch)
1397
def network_name(self):
1398
"""A simple byte string uniquely identifying this format for RPC calls.
1400
MetaDir branch formats use their disk format string to identify the
1401
repository over the wire. All in one formats such as bzr < 0.8, and
1402
foreign formats like svn/git and hg should use some marker which is
1403
unique and immutable.
1405
raise NotImplementedError(self.network_name)
1407
def open(self, a_bzrdir, _found=False, ignore_fallbacks=False):
1408
"""Return the branch object for a_bzrdir
1410
:param a_bzrdir: A BzrDir that contains a branch.
1411
:param _found: a private parameter, do not use it. It is used to
1412
indicate if format probing has already be done.
1413
:param ignore_fallbacks: when set, no fallback branches will be opened
1414
(if there are any). Default is to open fallbacks.
1416
raise NotImplementedError(self.open)
1419
def register_format(klass, format):
1420
"""Register a metadir format."""
1421
klass._formats[format.get_format_string()] = format
1422
# Metadir formats have a network name of their format string, and get
1423
# registered as class factories.
1424
network_format_registry.register(format.get_format_string(), format.__class__)
1427
def set_default_format(klass, format):
1428
klass._default_format = format
1430
def supports_stacking(self):
1431
"""True if this format records a stacked-on branch."""
1435
def unregister_format(klass, format):
1436
del klass._formats[format.get_format_string()]
1439
return self.get_format_description().rstrip()
1441
def supports_tags(self):
1442
"""True if this format supports tags stored in the branch"""
1443
return False # by default
1446
class BranchHooks(Hooks):
1447
"""A dictionary mapping hook name to a list of callables for branch hooks.
1449
e.g. ['set_rh'] Is the list of items to be called when the
1450
set_revision_history function is invoked.
1454
"""Create the default hooks.
1456
These are all empty initially, because by default nothing should get
1459
Hooks.__init__(self)
1460
self.create_hook(HookPoint('set_rh',
1461
"Invoked whenever the revision history has been set via "
1462
"set_revision_history. The api signature is (branch, "
1463
"revision_history), and the branch will be write-locked. "
1464
"The set_rh hook can be expensive for bzr to trigger, a better "
1465
"hook to use is Branch.post_change_branch_tip.", (0, 15), None))
1466
self.create_hook(HookPoint('open',
1467
"Called with the Branch object that has been opened after a "
1468
"branch is opened.", (1, 8), None))
1469
self.create_hook(HookPoint('post_push',
1470
"Called after a push operation completes. post_push is called "
1471
"with a bzrlib.branch.BranchPushResult object and only runs in the "
1472
"bzr client.", (0, 15), None))
1473
self.create_hook(HookPoint('post_pull',
1474
"Called after a pull operation completes. post_pull is called "
1475
"with a bzrlib.branch.PullResult object and only runs in the "
1476
"bzr client.", (0, 15), None))
1477
self.create_hook(HookPoint('pre_commit',
1478
"Called after a commit is calculated but before it is is "
1479
"completed. pre_commit is called with (local, master, old_revno, "
1480
"old_revid, future_revno, future_revid, tree_delta, future_tree"
1481
"). old_revid is NULL_REVISION for the first commit to a branch, "
1482
"tree_delta is a TreeDelta object describing changes from the "
1483
"basis revision. hooks MUST NOT modify this delta. "
1484
" future_tree is an in-memory tree obtained from "
1485
"CommitBuilder.revision_tree() and hooks MUST NOT modify this "
1486
"tree.", (0,91), None))
1487
self.create_hook(HookPoint('post_commit',
1488
"Called in the bzr client after a commit has completed. "
1489
"post_commit is called with (local, master, old_revno, old_revid, "
1490
"new_revno, new_revid). old_revid is NULL_REVISION for the first "
1491
"commit to a branch.", (0, 15), None))
1492
self.create_hook(HookPoint('post_uncommit',
1493
"Called in the bzr client after an uncommit completes. "
1494
"post_uncommit is called with (local, master, old_revno, "
1495
"old_revid, new_revno, new_revid) where local is the local branch "
1496
"or None, master is the target branch, and an empty branch "
1497
"receives new_revno of 0, new_revid of None.", (0, 15), None))
1498
self.create_hook(HookPoint('pre_change_branch_tip',
1499
"Called in bzr client and server before a change to the tip of a "
1500
"branch is made. pre_change_branch_tip is called with a "
1501
"bzrlib.branch.ChangeBranchTipParams. Note that push, pull, "
1502
"commit, uncommit will all trigger this hook.", (1, 6), None))
1503
self.create_hook(HookPoint('post_change_branch_tip',
1504
"Called in bzr client and server after a change to the tip of a "
1505
"branch is made. post_change_branch_tip is called with a "
1506
"bzrlib.branch.ChangeBranchTipParams. Note that push, pull, "
1507
"commit, uncommit will all trigger this hook.", (1, 4), None))
1508
self.create_hook(HookPoint('transform_fallback_location',
1509
"Called when a stacked branch is activating its fallback "
1510
"locations. transform_fallback_location is called with (branch, "
1511
"url), and should return a new url. Returning the same url "
1512
"allows it to be used as-is, returning a different one can be "
1513
"used to cause the branch to stack on a closer copy of that "
1514
"fallback_location. Note that the branch cannot have history "
1515
"accessing methods called on it during this hook because the "
1516
"fallback locations have not been activated. When there are "
1517
"multiple hooks installed for transform_fallback_location, "
1518
"all are called with the url returned from the previous hook."
1519
"The order is however undefined.", (1, 9), None))
1522
# install the default hooks into the Branch class.
1523
Branch.hooks = BranchHooks()
1526
class ChangeBranchTipParams(object):
1527
"""Object holding parameters passed to *_change_branch_tip hooks.
1529
There are 5 fields that hooks may wish to access:
1531
:ivar branch: the branch being changed
1532
:ivar old_revno: revision number before the change
1533
:ivar new_revno: revision number after the change
1534
:ivar old_revid: revision id before the change
1535
:ivar new_revid: revision id after the change
1537
The revid fields are strings. The revno fields are integers.
1540
def __init__(self, branch, old_revno, new_revno, old_revid, new_revid):
1541
"""Create a group of ChangeBranchTip parameters.
1543
:param branch: The branch being changed.
1544
:param old_revno: Revision number before the change.
1545
:param new_revno: Revision number after the change.
1546
:param old_revid: Tip revision id before the change.
1547
:param new_revid: Tip revision id after the change.
1549
self.branch = branch
1550
self.old_revno = old_revno
1551
self.new_revno = new_revno
1552
self.old_revid = old_revid
1553
self.new_revid = new_revid
1555
def __eq__(self, other):
1556
return self.__dict__ == other.__dict__
1559
return "<%s of %s from (%s, %s) to (%s, %s)>" % (
1560
self.__class__.__name__, self.branch,
1561
self.old_revno, self.old_revid, self.new_revno, self.new_revid)
1564
class BzrBranchFormat4(BranchFormat):
1565
"""Bzr branch format 4.
1568
- a revision-history file.
1569
- a branch-lock lock file [ to be shared with the bzrdir ]
1572
def get_format_description(self):
1573
"""See BranchFormat.get_format_description()."""
1574
return "Branch format 4"
1576
def initialize(self, a_bzrdir):
1577
"""Create a branch of this format in a_bzrdir."""
1578
utf8_files = [('revision-history', ''),
1579
('branch-name', ''),
1581
return self._initialize_helper(a_bzrdir, utf8_files,
1582
lock_type='branch4', set_format=False)
1585
super(BzrBranchFormat4, self).__init__()
1586
self._matchingbzrdir = bzrdir.BzrDirFormat6()
1588
def network_name(self):
1589
"""The network name for this format is the control dirs disk label."""
1590
return self._matchingbzrdir.get_format_string()
1592
def open(self, a_bzrdir, _found=False, ignore_fallbacks=False):
1593
"""See BranchFormat.open()."""
1595
# we are being called directly and must probe.
1596
raise NotImplementedError
1597
return BzrBranch(_format=self,
1598
_control_files=a_bzrdir._control_files,
1600
_repository=a_bzrdir.open_repository())
1603
return "Bazaar-NG branch format 4"
1606
class BranchFormatMetadir(BranchFormat):
1607
"""Common logic for meta-dir based branch formats."""
1609
def _branch_class(self):
1610
"""What class to instantiate on open calls."""
1611
raise NotImplementedError(self._branch_class)
1613
def network_name(self):
1614
"""A simple byte string uniquely identifying this format for RPC calls.
1616
Metadir branch formats use their format string.
1618
return self.get_format_string()
1620
def open(self, a_bzrdir, _found=False, ignore_fallbacks=False):
1621
"""See BranchFormat.open()."""
1623
format = BranchFormat.find_format(a_bzrdir)
1624
if format.__class__ != self.__class__:
1625
raise AssertionError("wrong format %r found for %r" %
1628
transport = a_bzrdir.get_branch_transport(None)
1629
control_files = lockable_files.LockableFiles(transport, 'lock',
1631
return self._branch_class()(_format=self,
1632
_control_files=control_files,
1634
_repository=a_bzrdir.find_repository(),
1635
ignore_fallbacks=ignore_fallbacks)
1636
except errors.NoSuchFile:
1637
raise errors.NotBranchError(path=transport.base)
1640
super(BranchFormatMetadir, self).__init__()
1641
self._matchingbzrdir = bzrdir.BzrDirMetaFormat1()
1642
self._matchingbzrdir.set_branch_format(self)
1644
def supports_tags(self):
1648
class BzrBranchFormat5(BranchFormatMetadir):
1649
"""Bzr branch format 5.
1652
- a revision-history file.
1654
- a lock dir guarding the branch itself
1655
- all of this stored in a branch/ subdirectory
1656
- works with shared repositories.
1658
This format is new in bzr 0.8.
1661
def _branch_class(self):
1664
def get_format_string(self):
1665
"""See BranchFormat.get_format_string()."""
1666
return "Bazaar-NG branch format 5\n"
1668
def get_format_description(self):
1669
"""See BranchFormat.get_format_description()."""
1670
return "Branch format 5"
1672
def initialize(self, a_bzrdir):
1673
"""Create a branch of this format in a_bzrdir."""
1674
utf8_files = [('revision-history', ''),
1675
('branch-name', ''),
1677
return self._initialize_helper(a_bzrdir, utf8_files)
1679
def supports_tags(self):
1683
class BzrBranchFormat6(BranchFormatMetadir):
1684
"""Branch format with last-revision and tags.
1686
Unlike previous formats, this has no explicit revision history. Instead,
1687
this just stores the last-revision, and the left-hand history leading
1688
up to there is the history.
1690
This format was introduced in bzr 0.15
1691
and became the default in 0.91.
1694
def _branch_class(self):
1697
def get_format_string(self):
1698
"""See BranchFormat.get_format_string()."""
1699
return "Bazaar Branch Format 6 (bzr 0.15)\n"
1701
def get_format_description(self):
1702
"""See BranchFormat.get_format_description()."""
1703
return "Branch format 6"
1705
def initialize(self, a_bzrdir):
1706
"""Create a branch of this format in a_bzrdir."""
1707
utf8_files = [('last-revision', '0 null:\n'),
1708
('branch.conf', ''),
1711
return self._initialize_helper(a_bzrdir, utf8_files)
1713
def make_tags(self, branch):
1714
"""See bzrlib.branch.BranchFormat.make_tags()."""
1715
return BasicTags(branch)
1719
class BzrBranchFormat7(BranchFormatMetadir):
1720
"""Branch format with last-revision, tags, and a stacked location pointer.
1722
The stacked location pointer is passed down to the repository and requires
1723
a repository format with supports_external_lookups = True.
1725
This format was introduced in bzr 1.6.
1728
def _branch_class(self):
1731
def get_format_string(self):
1732
"""See BranchFormat.get_format_string()."""
1733
return "Bazaar Branch Format 7 (needs bzr 1.6)\n"
1735
def get_format_description(self):
1736
"""See BranchFormat.get_format_description()."""
1737
return "Branch format 7"
1739
def initialize(self, a_bzrdir):
1740
"""Create a branch of this format in a_bzrdir."""
1741
utf8_files = [('last-revision', '0 null:\n'),
1742
('branch.conf', ''),
1745
return self._initialize_helper(a_bzrdir, utf8_files)
1748
super(BzrBranchFormat7, self).__init__()
1749
self._matchingbzrdir.repository_format = \
1750
RepositoryFormatKnitPack5RichRoot()
1752
def make_tags(self, branch):
1753
"""See bzrlib.branch.BranchFormat.make_tags()."""
1754
return BasicTags(branch)
1756
def supports_stacking(self):
1760
class BranchReferenceFormat(BranchFormat):
1761
"""Bzr branch reference format.
1763
Branch references are used in implementing checkouts, they
1764
act as an alias to the real branch which is at some other url.
1771
def get_format_string(self):
1772
"""See BranchFormat.get_format_string()."""
1773
return "Bazaar-NG Branch Reference Format 1\n"
1775
def get_format_description(self):
1776
"""See BranchFormat.get_format_description()."""
1777
return "Checkout reference format 1"
1779
def get_reference(self, a_bzrdir):
1780
"""See BranchFormat.get_reference()."""
1781
transport = a_bzrdir.get_branch_transport(None)
1782
return transport.get('location').read()
1784
def set_reference(self, a_bzrdir, to_branch):
1785
"""See BranchFormat.set_reference()."""
1786
transport = a_bzrdir.get_branch_transport(None)
1787
location = transport.put_bytes('location', to_branch.base)
1789
def initialize(self, a_bzrdir, target_branch=None):
1790
"""Create a branch of this format in a_bzrdir."""
1791
if target_branch is None:
1792
# this format does not implement branch itself, thus the implicit
1793
# creation contract must see it as uninitializable
1794
raise errors.UninitializableFormat(self)
1795
mutter('creating branch reference in %s', a_bzrdir.transport.base)
1796
branch_transport = a_bzrdir.get_branch_transport(self)
1797
branch_transport.put_bytes('location',
1798
target_branch.bzrdir.root_transport.base)
1799
branch_transport.put_bytes('format', self.get_format_string())
1801
a_bzrdir, _found=True,
1802
possible_transports=[target_branch.bzrdir.root_transport])
1805
super(BranchReferenceFormat, self).__init__()
1806
self._matchingbzrdir = bzrdir.BzrDirMetaFormat1()
1807
self._matchingbzrdir.set_branch_format(self)
1809
def _make_reference_clone_function(format, a_branch):
1810
"""Create a clone() routine for a branch dynamically."""
1811
def clone(to_bzrdir, revision_id=None,
1812
repository_policy=None):
1813
"""See Branch.clone()."""
1814
return format.initialize(to_bzrdir, a_branch)
1815
# cannot obey revision_id limits when cloning a reference ...
1816
# FIXME RBC 20060210 either nuke revision_id for clone, or
1817
# emit some sort of warning/error to the caller ?!
1820
def open(self, a_bzrdir, _found=False, location=None,
1821
possible_transports=None, ignore_fallbacks=False):
1822
"""Return the branch that the branch reference in a_bzrdir points at.
1824
:param a_bzrdir: A BzrDir that contains a branch.
1825
:param _found: a private parameter, do not use it. It is used to
1826
indicate if format probing has already be done.
1827
:param ignore_fallbacks: when set, no fallback branches will be opened
1828
(if there are any). Default is to open fallbacks.
1829
:param location: The location of the referenced branch. If
1830
unspecified, this will be determined from the branch reference in
1832
:param possible_transports: An optional reusable transports list.
1835
format = BranchFormat.find_format(a_bzrdir)
1836
if format.__class__ != self.__class__:
1837
raise AssertionError("wrong format %r found for %r" %
1839
if location is None:
1840
location = self.get_reference(a_bzrdir)
1841
real_bzrdir = bzrdir.BzrDir.open(
1842
location, possible_transports=possible_transports)
1843
result = real_bzrdir.open_branch(ignore_fallbacks=ignore_fallbacks)
1844
# this changes the behaviour of result.clone to create a new reference
1845
# rather than a copy of the content of the branch.
1846
# I did not use a proxy object because that needs much more extensive
1847
# testing, and we are only changing one behaviour at the moment.
1848
# If we decide to alter more behaviours - i.e. the implicit nickname
1849
# then this should be refactored to introduce a tested proxy branch
1850
# and a subclass of that for use in overriding clone() and ....
1852
result.clone = self._make_reference_clone_function(result)
1856
network_format_registry = registry.FormatRegistry()
1857
"""Registry of formats indexed by their network name.
1859
The network name for a branch format is an identifier that can be used when
1860
referring to formats with smart server operations. See
1861
BranchFormat.network_name() for more detail.
1865
# formats which have no format string are not discoverable
1866
# and not independently creatable, so are not registered.
1867
__format5 = BzrBranchFormat5()
1868
__format6 = BzrBranchFormat6()
1869
__format7 = BzrBranchFormat7()
1870
BranchFormat.register_format(__format5)
1871
BranchFormat.register_format(BranchReferenceFormat())
1872
BranchFormat.register_format(__format6)
1873
BranchFormat.register_format(__format7)
1874
BranchFormat.set_default_format(__format6)
1875
_legacy_formats = [BzrBranchFormat4(),
1877
network_format_registry.register(
1878
_legacy_formats[0].network_name(), _legacy_formats[0].__class__)
1881
class BzrBranch(Branch):
1882
"""A branch stored in the actual filesystem.
1884
Note that it's "local" in the context of the filesystem; it doesn't
1885
really matter if it's on an nfs/smb/afs/coda/... share, as long as
1886
it's writable, and can be accessed via the normal filesystem API.
1888
:ivar _transport: Transport for file operations on this branch's
1889
control files, typically pointing to the .bzr/branch directory.
1890
:ivar repository: Repository for this branch.
1891
:ivar base: The url of the base directory for this branch; the one
1892
containing the .bzr directory.
1895
def __init__(self, _format=None,
1896
_control_files=None, a_bzrdir=None, _repository=None,
1897
ignore_fallbacks=False):
1898
"""Create new branch object at a particular location."""
1899
if a_bzrdir is None:
1900
raise ValueError('a_bzrdir must be supplied')
1902
self.bzrdir = a_bzrdir
1903
self._base = self.bzrdir.transport.clone('..').base
1904
# XXX: We should be able to just do
1905
# self.base = self.bzrdir.root_transport.base
1906
# but this does not quite work yet -- mbp 20080522
1907
self._format = _format
1908
if _control_files is None:
1909
raise ValueError('BzrBranch _control_files is None')
1910
self.control_files = _control_files
1911
self._transport = _control_files._transport
1912
self.repository = _repository
1913
Branch.__init__(self)
1916
return '%s(%r)' % (self.__class__.__name__, self.base)
1920
def _get_base(self):
1921
"""Returns the directory containing the control directory."""
1924
base = property(_get_base, doc="The URL for the root of this branch.")
1926
def _get_config(self):
1927
return TransportConfig(self._transport, 'branch.conf')
1929
def is_locked(self):
1930
return self.control_files.is_locked()
1932
def lock_write(self, token=None):
1933
repo_control = getattr(self.repository, 'control_files', None)
1934
if self.control_files is repo_control or not self.is_locked():
1935
self.repository.lock_write()
1940
return self.control_files.lock_write(token=token)
1943
self.repository.unlock()
1946
def lock_read(self):
1947
repo_control = getattr(self.repository, 'control_files', None)
1948
if self.control_files is repo_control or not self.is_locked():
1949
self.repository.lock_read()
1954
self.control_files.lock_read()
1957
self.repository.unlock()
1961
self.control_files.unlock()
1962
repo_control = getattr(self.repository, 'control_files', None)
1963
if (self.control_files is repo_control or
1964
not self.control_files.is_locked()):
1965
self.repository.unlock()
1966
if not self.control_files.is_locked():
1967
# we just released the lock
1968
self._clear_cached_state()
1970
def peek_lock_mode(self):
1971
if self.control_files._lock_count == 0:
1974
return self.control_files._lock_mode
1976
def get_physical_lock_status(self):
1977
return self.control_files.get_physical_lock_status()
1980
def print_file(self, file, revision_id):
1981
"""See Branch.print_file."""
1982
return self.repository.print_file(file, revision_id)
1984
def _write_revision_history(self, history):
1985
"""Factored out of set_revision_history.
1987
This performs the actual writing to disk.
1988
It is intended to be called by BzrBranch5.set_revision_history."""
1989
self._transport.put_bytes(
1990
'revision-history', '\n'.join(history),
1991
mode=self.bzrdir._get_file_mode())
1994
def set_revision_history(self, rev_history):
1995
"""See Branch.set_revision_history."""
1996
if 'evil' in debug.debug_flags:
1997
mutter_callsite(3, "set_revision_history scales with history.")
1998
check_not_reserved_id = _mod_revision.check_not_reserved_id
1999
for rev_id in rev_history:
2000
check_not_reserved_id(rev_id)
2001
if Branch.hooks['post_change_branch_tip']:
2002
# Don't calculate the last_revision_info() if there are no hooks
2004
old_revno, old_revid = self.last_revision_info()
2005
if len(rev_history) == 0:
2006
revid = _mod_revision.NULL_REVISION
2008
revid = rev_history[-1]
2009
self._run_pre_change_branch_tip_hooks(len(rev_history), revid)
2010
self._write_revision_history(rev_history)
2011
self._clear_cached_state()
2012
self._cache_revision_history(rev_history)
2013
for hook in Branch.hooks['set_rh']:
2014
hook(self, rev_history)
2015
if Branch.hooks['post_change_branch_tip']:
2016
self._run_post_change_branch_tip_hooks(old_revno, old_revid)
2018
def _synchronize_history(self, destination, revision_id):
2019
"""Synchronize last revision and revision history between branches.
2021
This version is most efficient when the destination is also a
2022
BzrBranch5, but works for BzrBranch6 as long as the revision
2023
history is the true lefthand parent history, and all of the revisions
2024
are in the destination's repository. If not, set_revision_history
2027
:param destination: The branch to copy the history into
2028
:param revision_id: The revision-id to truncate history at. May
2029
be None to copy complete history.
2031
if not isinstance(destination._format, BzrBranchFormat5):
2032
super(BzrBranch, self)._synchronize_history(
2033
destination, revision_id)
2035
if revision_id == _mod_revision.NULL_REVISION:
2038
new_history = self.revision_history()
2039
if revision_id is not None and new_history != []:
2041
new_history = new_history[:new_history.index(revision_id) + 1]
2043
rev = self.repository.get_revision(revision_id)
2044
new_history = rev.get_history(self.repository)[1:]
2045
destination.set_revision_history(new_history)
2048
def set_last_revision_info(self, revno, revision_id):
2049
"""Set the last revision of this branch.
2051
The caller is responsible for checking that the revno is correct
2052
for this revision id.
2054
It may be possible to set the branch last revision to an id not
2055
present in the repository. However, branches can also be
2056
configured to check constraints on history, in which case this may not
2059
revision_id = _mod_revision.ensure_null(revision_id)
2060
# this old format stores the full history, but this api doesn't
2061
# provide it, so we must generate, and might as well check it's
2063
history = self._lefthand_history(revision_id)
2064
if len(history) != revno:
2065
raise AssertionError('%d != %d' % (len(history), revno))
2066
self.set_revision_history(history)
2068
def _gen_revision_history(self):
2069
history = self._transport.get_bytes('revision-history').split('\n')
2070
if history[-1:] == ['']:
2071
# There shouldn't be a trailing newline, but just in case.
2076
def generate_revision_history(self, revision_id, last_rev=None,
2078
"""Create a new revision history that will finish with revision_id.
2080
:param revision_id: the new tip to use.
2081
:param last_rev: The previous last_revision. If not None, then this
2082
must be a ancestory of revision_id, or DivergedBranches is raised.
2083
:param other_branch: The other branch that DivergedBranches should
2084
raise with respect to.
2086
self.set_revision_history(self._lefthand_history(revision_id,
2087
last_rev, other_branch))
2089
def basis_tree(self):
2090
"""See Branch.basis_tree."""
2091
return self.repository.revision_tree(self.last_revision())
2094
def pull(self, source, overwrite=False, stop_revision=None,
2095
_hook_master=None, run_hooks=True, possible_transports=None,
2096
_override_hook_target=None):
2099
:param _hook_master: Private parameter - set the branch to
2100
be supplied as the master to pull hooks.
2101
:param run_hooks: Private parameter - if false, this branch
2102
is being called because it's the master of the primary branch,
2103
so it should not run its hooks.
2104
:param _override_hook_target: Private parameter - set the branch to be
2105
supplied as the target_branch to pull hooks.
2107
result = PullResult()
2108
result.source_branch = source
2109
if _override_hook_target is None:
2110
result.target_branch = self
2112
result.target_branch = _override_hook_target
2115
# We assume that during 'pull' the local repository is closer than
2117
graph = self.repository.get_graph(source.repository)
2118
result.old_revno, result.old_revid = self.last_revision_info()
2119
self.update_revisions(source, stop_revision, overwrite=overwrite,
2121
result.tag_conflicts = source.tags.merge_to(self.tags, overwrite)
2122
result.new_revno, result.new_revid = self.last_revision_info()
2124
result.master_branch = _hook_master
2125
result.local_branch = result.target_branch
2127
result.master_branch = result.target_branch
2128
result.local_branch = None
2130
for hook in Branch.hooks['post_pull']:
2136
def _get_parent_location(self):
2137
_locs = ['parent', 'pull', 'x-pull']
2140
return self._transport.get_bytes(l).strip('\n')
2141
except errors.NoSuchFile:
2146
def push(self, target, overwrite=False, stop_revision=None,
2147
_override_hook_source_branch=None):
2150
This is the basic concrete implementation of push()
2152
:param _override_hook_source_branch: If specified, run
2153
the hooks passing this Branch as the source, rather than self.
2154
This is for use of RemoteBranch, where push is delegated to the
2155
underlying vfs-based Branch.
2157
# TODO: Public option to disable running hooks - should be trivial but
2159
return _run_with_write_locked_target(
2160
target, self._push_with_bound_branches, target, overwrite,
2162
_override_hook_source_branch=_override_hook_source_branch)
2164
def _push_with_bound_branches(self, target, overwrite,
2166
_override_hook_source_branch=None):
2167
"""Push from self into target, and into target's master if any.
2169
This is on the base BzrBranch class even though it doesn't support
2170
bound branches because the *target* might be bound.
2173
if _override_hook_source_branch:
2174
result.source_branch = _override_hook_source_branch
2175
for hook in Branch.hooks['post_push']:
2178
bound_location = target.get_bound_location()
2179
if bound_location and target.base != bound_location:
2180
# there is a master branch.
2182
# XXX: Why the second check? Is it even supported for a branch to
2183
# be bound to itself? -- mbp 20070507
2184
master_branch = target.get_master_branch()
2185
master_branch.lock_write()
2187
# push into the master from this branch.
2188
self._basic_push(master_branch, overwrite, stop_revision)
2189
# and push into the target branch from this. Note that we push from
2190
# this branch again, because its considered the highest bandwidth
2192
result = self._basic_push(target, overwrite, stop_revision)
2193
result.master_branch = master_branch
2194
result.local_branch = target
2198
master_branch.unlock()
2201
result = self._basic_push(target, overwrite, stop_revision)
2202
# TODO: Why set master_branch and local_branch if there's no
2203
# binding? Maybe cleaner to just leave them unset? -- mbp
2205
result.master_branch = target
2206
result.local_branch = None
2210
def _basic_push(self, target, overwrite, stop_revision):
2211
"""Basic implementation of push without bound branches or hooks.
2213
Must be called with self read locked and target write locked.
2215
result = BranchPushResult()
2216
result.source_branch = self
2217
result.target_branch = target
2218
result.old_revno, result.old_revid = target.last_revision_info()
2219
if result.old_revid != self.last_revision():
2220
# We assume that during 'push' this repository is closer than
2222
graph = self.repository.get_graph(target.repository)
2223
target.update_revisions(self, stop_revision, overwrite=overwrite,
2225
if self._push_should_merge_tags():
2226
result.tag_conflicts = self.tags.merge_to(target.tags, overwrite)
2227
result.new_revno, result.new_revid = target.last_revision_info()
2230
def get_stacked_on_url(self):
2231
raise errors.UnstackableBranchFormat(self._format, self.base)
2233
def set_push_location(self, location):
2234
"""See Branch.set_push_location."""
2235
self.get_config().set_user_option(
2236
'push_location', location,
2237
store=_mod_config.STORE_LOCATION_NORECURSE)
2239
def _set_parent_location(self, url):
2241
self._transport.delete('parent')
2243
self._transport.put_bytes('parent', url + '\n',
2244
mode=self.bzrdir._get_file_mode())
2247
class BzrBranch5(BzrBranch):
2248
"""A format 5 branch. This supports new features over plain branches.
2250
It has support for a master_branch which is the data for bound branches.
2254
def pull(self, source, overwrite=False, stop_revision=None,
2255
run_hooks=True, possible_transports=None,
2256
_override_hook_target=None):
2257
"""Pull from source into self, updating my master if any.
2259
:param run_hooks: Private parameter - if false, this branch
2260
is being called because it's the master of the primary branch,
2261
so it should not run its hooks.
2263
bound_location = self.get_bound_location()
2264
master_branch = None
2265
if bound_location and source.base != bound_location:
2266
# not pulling from master, so we need to update master.
2267
master_branch = self.get_master_branch(possible_transports)
2268
master_branch.lock_write()
2271
# pull from source into master.
2272
master_branch.pull(source, overwrite, stop_revision,
2274
return super(BzrBranch5, self).pull(source, overwrite,
2275
stop_revision, _hook_master=master_branch,
2276
run_hooks=run_hooks,
2277
_override_hook_target=_override_hook_target)
2280
master_branch.unlock()
2282
def get_bound_location(self):
2284
return self._transport.get_bytes('bound')[:-1]
2285
except errors.NoSuchFile:
2289
def get_master_branch(self, possible_transports=None):
2290
"""Return the branch we are bound to.
2292
:return: Either a Branch, or None
2294
This could memoise the branch, but if thats done
2295
it must be revalidated on each new lock.
2296
So for now we just don't memoise it.
2297
# RBC 20060304 review this decision.
2299
bound_loc = self.get_bound_location()
2303
return Branch.open(bound_loc,
2304
possible_transports=possible_transports)
2305
except (errors.NotBranchError, errors.ConnectionError), e:
2306
raise errors.BoundBranchConnectionFailure(
2310
def set_bound_location(self, location):
2311
"""Set the target where this branch is bound to.
2313
:param location: URL to the target branch
2316
self._transport.put_bytes('bound', location+'\n',
2317
mode=self.bzrdir._get_file_mode())
2320
self._transport.delete('bound')
2321
except errors.NoSuchFile:
2326
def bind(self, other):
2327
"""Bind this branch to the branch other.
2329
This does not push or pull data between the branches, though it does
2330
check for divergence to raise an error when the branches are not
2331
either the same, or one a prefix of the other. That behaviour may not
2332
be useful, so that check may be removed in future.
2334
:param other: The branch to bind to
2337
# TODO: jam 20051230 Consider checking if the target is bound
2338
# It is debatable whether you should be able to bind to
2339
# a branch which is itself bound.
2340
# Committing is obviously forbidden,
2341
# but binding itself may not be.
2342
# Since we *have* to check at commit time, we don't
2343
# *need* to check here
2345
# we want to raise diverged if:
2346
# last_rev is not in the other_last_rev history, AND
2347
# other_last_rev is not in our history, and do it without pulling
2349
self.set_bound_location(other.base)
2353
"""If bound, unbind"""
2354
return self.set_bound_location(None)
2357
def update(self, possible_transports=None):
2358
"""Synchronise this branch with the master branch if any.
2360
:return: None or the last_revision that was pivoted out during the
2363
master = self.get_master_branch(possible_transports)
2364
if master is not None:
2365
old_tip = _mod_revision.ensure_null(self.last_revision())
2366
self.pull(master, overwrite=True)
2367
if self.repository.get_graph().is_ancestor(old_tip,
2368
_mod_revision.ensure_null(self.last_revision())):
2374
class BzrBranch7(BzrBranch5):
2375
"""A branch with support for a fallback repository."""
2377
def _open_hook(self):
2378
if self._ignore_fallbacks:
2381
url = self.get_stacked_on_url()
2382
except (errors.UnstackableRepositoryFormat, errors.NotStacked,
2383
errors.UnstackableBranchFormat):
2386
for hook in Branch.hooks['transform_fallback_location']:
2387
url = hook(self, url)
2389
hook_name = Branch.hooks.get_hook_name(hook)
2390
raise AssertionError(
2391
"'transform_fallback_location' hook %s returned "
2392
"None, not a URL." % hook_name)
2393
self._activate_fallback_location(url, None)
2395
def __init__(self, *args, **kwargs):
2396
self._ignore_fallbacks = kwargs.get('ignore_fallbacks', False)
2397
super(BzrBranch7, self).__init__(*args, **kwargs)
2398
self._last_revision_info_cache = None
2399
self._partial_revision_history_cache = []
2401
def _clear_cached_state(self):
2402
super(BzrBranch7, self)._clear_cached_state()
2403
self._last_revision_info_cache = None
2404
self._partial_revision_history_cache = []
2406
def _last_revision_info(self):
2407
revision_string = self._transport.get_bytes('last-revision')
2408
revno, revision_id = revision_string.rstrip('\n').split(' ', 1)
2409
revision_id = cache_utf8.get_cached_utf8(revision_id)
2411
return revno, revision_id
2413
def _write_last_revision_info(self, revno, revision_id):
2414
"""Simply write out the revision id, with no checks.
2416
Use set_last_revision_info to perform this safely.
2418
Does not update the revision_history cache.
2419
Intended to be called by set_last_revision_info and
2420
_write_revision_history.
2422
revision_id = _mod_revision.ensure_null(revision_id)
2423
out_string = '%d %s\n' % (revno, revision_id)
2424
self._transport.put_bytes('last-revision', out_string,
2425
mode=self.bzrdir._get_file_mode())
2428
def set_last_revision_info(self, revno, revision_id):
2429
revision_id = _mod_revision.ensure_null(revision_id)
2430
old_revno, old_revid = self.last_revision_info()
2431
if self._get_append_revisions_only():
2432
self._check_history_violation(revision_id)
2433
self._run_pre_change_branch_tip_hooks(revno, revision_id)
2434
self._write_last_revision_info(revno, revision_id)
2435
self._clear_cached_state()
2436
self._last_revision_info_cache = revno, revision_id
2437
self._run_post_change_branch_tip_hooks(old_revno, old_revid)
2439
def _synchronize_history(self, destination, revision_id):
2440
"""Synchronize last revision and revision history between branches.
2442
:see: Branch._synchronize_history
2444
# XXX: The base Branch has a fast implementation of this method based
2445
# on set_last_revision_info, but BzrBranch/BzrBranch5 have a slower one
2446
# that uses set_revision_history. This class inherits from BzrBranch5,
2447
# but wants the fast implementation, so it calls
2448
# Branch._synchronize_history directly.
2449
Branch._synchronize_history(self, destination, revision_id)
2451
def _check_history_violation(self, revision_id):
2452
last_revision = _mod_revision.ensure_null(self.last_revision())
2453
if _mod_revision.is_null(last_revision):
2455
if last_revision not in self._lefthand_history(revision_id):
2456
raise errors.AppendRevisionsOnlyViolation(self.base)
2458
def _gen_revision_history(self):
2459
"""Generate the revision history from last revision
2461
last_revno, last_revision = self.last_revision_info()
2462
self._extend_partial_history(stop_index=last_revno-1)
2463
return list(reversed(self._partial_revision_history_cache))
2465
def _extend_partial_history(self, stop_index=None, stop_revision=None):
2466
"""Extend the partial history to include a given index
2468
If a stop_index is supplied, stop when that index has been reached.
2469
If a stop_revision is supplied, stop when that revision is
2470
encountered. Otherwise, stop when the beginning of history is
2473
:param stop_index: The index which should be present. When it is
2474
present, history extension will stop.
2475
:param revision_id: The revision id which should be present. When
2476
it is encountered, history extension will stop.
2478
repo = self.repository
2479
if len(self._partial_revision_history_cache) == 0:
2480
iterator = repo.iter_reverse_revision_history(self.last_revision())
2482
start_revision = self._partial_revision_history_cache[-1]
2483
iterator = repo.iter_reverse_revision_history(start_revision)
2484
#skip the last revision in the list
2485
next_revision = iterator.next()
2486
for revision_id in iterator:
2487
self._partial_revision_history_cache.append(revision_id)
2488
if (stop_index is not None and
2489
len(self._partial_revision_history_cache) > stop_index):
2491
if revision_id == stop_revision:
2494
def _write_revision_history(self, history):
2495
"""Factored out of set_revision_history.
2497
This performs the actual writing to disk, with format-specific checks.
2498
It is intended to be called by BzrBranch5.set_revision_history.
2500
if len(history) == 0:
2501
last_revision = 'null:'
2503
if history != self._lefthand_history(history[-1]):
2504
raise errors.NotLefthandHistory(history)
2505
last_revision = history[-1]
2506
if self._get_append_revisions_only():
2507
self._check_history_violation(last_revision)
2508
self._write_last_revision_info(len(history), last_revision)
2511
def _set_parent_location(self, url):
2512
"""Set the parent branch"""
2513
self._set_config_location('parent_location', url, make_relative=True)
2516
def _get_parent_location(self):
2517
"""Set the parent branch"""
2518
return self._get_config_location('parent_location')
2520
def set_push_location(self, location):
2521
"""See Branch.set_push_location."""
2522
self._set_config_location('push_location', location)
2524
def set_bound_location(self, location):
2525
"""See Branch.set_push_location."""
2527
config = self.get_config()
2528
if location is None:
2529
if config.get_user_option('bound') != 'True':
2532
config.set_user_option('bound', 'False', warn_masked=True)
2535
self._set_config_location('bound_location', location,
2537
config.set_user_option('bound', 'True', warn_masked=True)
2540
def _get_bound_location(self, bound):
2541
"""Return the bound location in the config file.
2543
Return None if the bound parameter does not match"""
2544
config = self.get_config()
2545
config_bound = (config.get_user_option('bound') == 'True')
2546
if config_bound != bound:
2548
return self._get_config_location('bound_location', config=config)
2550
def get_bound_location(self):
2551
"""See Branch.set_push_location."""
2552
return self._get_bound_location(True)
2554
def get_old_bound_location(self):
2555
"""See Branch.get_old_bound_location"""
2556
return self._get_bound_location(False)
2558
def get_stacked_on_url(self):
2559
# you can always ask for the URL; but you might not be able to use it
2560
# if the repo can't support stacking.
2561
## self._check_stackable_repo()
2562
stacked_url = self._get_config_location('stacked_on_location')
2563
if stacked_url is None:
2564
raise errors.NotStacked(self)
2567
def set_append_revisions_only(self, enabled):
2572
self.get_config().set_user_option('append_revisions_only', value,
2575
def _get_append_revisions_only(self):
2576
value = self.get_config().get_user_option('append_revisions_only')
2577
return value == 'True'
2580
def generate_revision_history(self, revision_id, last_rev=None,
2582
"""See BzrBranch5.generate_revision_history"""
2583
history = self._lefthand_history(revision_id, last_rev, other_branch)
2584
revno = len(history)
2585
self.set_last_revision_info(revno, revision_id)
2588
def get_rev_id(self, revno, history=None):
2589
"""Find the revision id of the specified revno."""
2591
return _mod_revision.NULL_REVISION
2593
last_revno, last_revision_id = self.last_revision_info()
2594
if revno <= 0 or revno > last_revno:
2595
raise errors.NoSuchRevision(self, revno)
2597
if history is not None:
2598
return history[revno - 1]
2600
index = last_revno - revno
2601
if len(self._partial_revision_history_cache) <= index:
2602
self._extend_partial_history(stop_index=index)
2603
if len(self._partial_revision_history_cache) > index:
2604
return self._partial_revision_history_cache[index]
2606
raise errors.NoSuchRevision(self, revno)
2609
def revision_id_to_revno(self, revision_id):
2610
"""Given a revision id, return its revno"""
2611
if _mod_revision.is_null(revision_id):
2614
index = self._partial_revision_history_cache.index(revision_id)
2616
self._extend_partial_history(stop_revision=revision_id)
2617
index = len(self._partial_revision_history_cache) - 1
2618
if self._partial_revision_history_cache[index] != revision_id:
2619
raise errors.NoSuchRevision(self, revision_id)
2620
return self.revno() - index
2623
class BzrBranch6(BzrBranch7):
2624
"""See BzrBranchFormat6 for the capabilities of this branch.
2626
This subclass of BzrBranch7 disables the new features BzrBranch7 added,
2630
def get_stacked_on_url(self):
2631
raise errors.UnstackableBranchFormat(self._format, self.base)
2634
######################################################################
2635
# results of operations
2638
class _Result(object):
2640
def _show_tag_conficts(self, to_file):
2641
if not getattr(self, 'tag_conflicts', None):
2643
to_file.write('Conflicting tags:\n')
2644
for name, value1, value2 in self.tag_conflicts:
2645
to_file.write(' %s\n' % (name, ))
2648
class PullResult(_Result):
2649
"""Result of a Branch.pull operation.
2651
:ivar old_revno: Revision number before pull.
2652
:ivar new_revno: Revision number after pull.
2653
:ivar old_revid: Tip revision id before pull.
2654
:ivar new_revid: Tip revision id after pull.
2655
:ivar source_branch: Source (local) branch object. (read locked)
2656
:ivar master_branch: Master branch of the target, or the target if no
2658
:ivar local_branch: target branch if there is a Master, else None
2659
:ivar target_branch: Target/destination branch object. (write locked)
2660
:ivar tag_conflicts: A list of tag conflicts, see BasicTags.merge_to
2664
# DEPRECATED: pull used to return the change in revno
2665
return self.new_revno - self.old_revno
2667
def report(self, to_file):
2669
if self.old_revid == self.new_revid:
2670
to_file.write('No revisions to pull.\n')
2672
to_file.write('Now on revision %d.\n' % self.new_revno)
2673
self._show_tag_conficts(to_file)
2676
class BranchPushResult(_Result):
2677
"""Result of a Branch.push operation.
2679
:ivar old_revno: Revision number (eg 10) of the target before push.
2680
:ivar new_revno: Revision number (eg 12) of the target after push.
2681
:ivar old_revid: Tip revision id (eg joe@foo.com-1234234-aoeua34) of target
2683
:ivar new_revid: Tip revision id (eg joe@foo.com-5676566-boa234a) of target
2685
:ivar source_branch: Source branch object that the push was from. This is
2686
read locked, and generally is a local (and thus low latency) branch.
2687
:ivar master_branch: If target is a bound branch, the master branch of
2688
target, or target itself. Always write locked.
2689
:ivar target_branch: The direct Branch where data is being sent (write
2691
:ivar local_branch: If the target is a bound branch this will be the
2692
target, otherwise it will be None.
2696
# DEPRECATED: push used to return the change in revno
2697
return self.new_revno - self.old_revno
2699
def report(self, to_file):
2700
"""Write a human-readable description of the result."""
2701
if self.old_revid == self.new_revid:
2702
note('No new revisions to push.')
2704
note('Pushed up to revision %d.' % self.new_revno)
2705
self._show_tag_conficts(to_file)
2708
class BranchCheckResult(object):
2709
"""Results of checking branch consistency.
2714
def __init__(self, branch):
2715
self.branch = branch
2717
def report_results(self, verbose):
2718
"""Report the check results via trace.note.
2720
:param verbose: Requests more detailed display of what was checked,
2723
note('checked branch %s format %s',
2725
self.branch._format)
2728
class Converter5to6(object):
2729
"""Perform an in-place upgrade of format 5 to format 6"""
2731
def convert(self, branch):
2732
# Data for 5 and 6 can peacefully coexist.
2733
format = BzrBranchFormat6()
2734
new_branch = format.open(branch.bzrdir, _found=True)
2736
# Copy source data into target
2737
new_branch._write_last_revision_info(*branch.last_revision_info())
2738
new_branch.set_parent(branch.get_parent())
2739
new_branch.set_bound_location(branch.get_bound_location())
2740
new_branch.set_push_location(branch.get_push_location())
2742
# New branch has no tags by default
2743
new_branch.tags._set_tag_dict({})
2745
# Copying done; now update target format
2746
new_branch._transport.put_bytes('format',
2747
format.get_format_string(),
2748
mode=new_branch.bzrdir._get_file_mode())
2750
# Clean up old files
2751
new_branch._transport.delete('revision-history')
2753
branch.set_parent(None)
2754
except errors.NoSuchFile:
2756
branch.set_bound_location(None)
2759
class Converter6to7(object):
2760
"""Perform an in-place upgrade of format 6 to format 7"""
2762
def convert(self, branch):
2763
format = BzrBranchFormat7()
2764
branch._set_config_location('stacked_on_location', '')
2765
# update target format
2766
branch._transport.put_bytes('format', format.get_format_string())
2770
def _run_with_write_locked_target(target, callable, *args, **kwargs):
2771
"""Run ``callable(*args, **kwargs)``, write-locking target for the
2774
_run_with_write_locked_target will attempt to release the lock it acquires.
2776
If an exception is raised by callable, then that exception *will* be
2777
propagated, even if the unlock attempt raises its own error. Thus
2778
_run_with_write_locked_target should be preferred to simply doing::
2782
return callable(*args, **kwargs)
2787
# This is very similar to bzrlib.decorators.needs_write_lock. Perhaps they
2788
# should share code?
2791
result = callable(*args, **kwargs)
2793
exc_info = sys.exc_info()
2797
raise exc_info[0], exc_info[1], exc_info[2]
2803
class InterBranch(InterObject):
2804
"""This class represents operations taking place between two branches.
2806
Its instances have methods like pull() and push() and contain
2807
references to the source and target repositories these operations
2808
can be carried out on.
2812
"""The available optimised InterBranch types."""
2815
def _get_branch_formats_to_test():
2816
"""Return a tuple with the Branch formats to use when testing."""
2817
raise NotImplementedError(self._get_branch_formats_to_test)
2819
def update_revisions(self, stop_revision=None, overwrite=False,
2821
"""Pull in new perfect-fit revisions.
2823
:param stop_revision: Updated until the given revision
2824
:param overwrite: Always set the branch pointer, rather than checking
2825
to see if it is a proper descendant.
2826
:param graph: A Graph object that can be used to query history
2827
information. This can be None.
2830
raise NotImplementedError(self.update_revisions)
2833
class GenericInterBranch(InterBranch):
2834
"""InterBranch implementation that uses public Branch functions.
2838
def _get_branch_formats_to_test():
2839
return BranchFormat._default_format, BranchFormat._default_format
2841
def update_revisions(self, stop_revision=None, overwrite=False,
2843
"""See InterBranch.update_revisions()."""
2844
self.source.lock_read()
2846
other_revno, other_last_revision = self.source.last_revision_info()
2847
stop_revno = None # unknown
2848
if stop_revision is None:
2849
stop_revision = other_last_revision
2850
if _mod_revision.is_null(stop_revision):
2851
# if there are no commits, we're done.
2853
stop_revno = other_revno
2855
# what's the current last revision, before we fetch [and change it
2857
last_rev = _mod_revision.ensure_null(self.target.last_revision())
2858
# we fetch here so that we don't process data twice in the common
2859
# case of having something to pull, and so that the check for
2860
# already merged can operate on the just fetched graph, which will
2861
# be cached in memory.
2862
self.target.fetch(self.source, stop_revision)
2863
# Check to see if one is an ancestor of the other
2866
graph = self.target.repository.get_graph()
2867
if self.target._check_if_descendant_or_diverged(
2868
stop_revision, last_rev, graph, self.source):
2869
# stop_revision is a descendant of last_rev, but we aren't
2870
# overwriting, so we're done.
2872
if stop_revno is None:
2874
graph = self.target.repository.get_graph()
2875
this_revno, this_last_revision = \
2876
self.target.last_revision_info()
2877
stop_revno = graph.find_distance_to_null(stop_revision,
2878
[(other_last_revision, other_revno),
2879
(this_last_revision, this_revno)])
2880
self.target.set_last_revision_info(stop_revno, stop_revision)
2882
self.source.unlock()
2885
def is_compatible(self, source, target):
2886
# GenericBranch uses the public API, so always compatible
2890
InterBranch.register_optimiser(GenericInterBranch)
added
removed
bzrlib/branch.py
