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# Copyright (C) 2005, 2006, 2007, 2008 Canonical Ltd
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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from bzrlib.lazy_import import lazy_import
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lazy_import(globals(), """
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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
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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 Hooks
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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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# override this to set the strategy for storing tags
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return DisabledTags(self)
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def __init__(self, *ignored, **ignored_too):
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self.tags = self._make_tags()
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self._revision_history_cache = None
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self._revision_id_to_revno_cache = None
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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 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 get_config(self):
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return BranchConfig(self)
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return self.get_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 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 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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last_revision = self.last_revision()
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revision_graph = repository._old_get_graph(self.repository,
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merge_sorted_revisions = tsort.merge_sort(
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revision_id_to_revno = dict((rev_id, revno)
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for seq_num, rev_id, depth, revno, end_of_merge
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in merge_sorted_revisions)
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return revision_id_to_revno
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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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@deprecated_method(deprecated_in((0, 16, 0)))
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def abspath(self, name):
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"""Return absolute filename for something in the branch
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XXX: Robert Collins 20051017 what is this used for? why is it a branch
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method and not a tree method.
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raise NotImplementedError(self.abspath)
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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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Returns the copied revision count and the failed revisions in a tuple:
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if self.base == from_branch.base:
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nested_pb = ui.ui_factory.nested_progress_bar()
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from_branch.lock_read()
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if last_revision is None:
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pb.update('get source history')
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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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if nested_pb is not None:
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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 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 _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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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
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should consider it to be private.
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raise NotImplementedError(self._gen_revision_history)
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def revision_history(self):
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"""Return sequence of revision ids on this branch.
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This method will cache the revision history for as long as it is safe to
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if 'evil' in debug.debug_flags:
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mutter_callsite(3, "revision_history scales with history.")
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if self._revision_history_cache is not None:
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history = self._revision_history_cache
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history = self._gen_revision_history()
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self._cache_revision_history(history)
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"""Return current revision number for this branch.
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That is equivalent to the number of revisions committed to
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return self.last_revision_info()[0]
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"""Older format branches cannot bind or unbind."""
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raise errors.UpgradeRequired(self.base)
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def set_append_revisions_only(self, enabled):
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"""Older format branches are never restricted to append-only"""
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raise errors.UpgradeRequired(self.base)
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def last_revision(self):
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"""Return last revision id, or NULL_REVISION."""
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return self.last_revision_info()[1]
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def last_revision_info(self):
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"""Return information about the last revision.
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:return: A tuple (revno, last_revision_id).
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rh = self.revision_history()
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return (revno, rh[-1])
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return (0, _mod_revision.NULL_REVISION)
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@deprecated_method(deprecated_in((1, 6, 0)))
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def missing_revisions(self, other, stop_revision=None):
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"""Return a list of new revisions that would perfectly fit.
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If self and other have not diverged, return a list of the revisions
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present in other, but missing from self.
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self_history = self.revision_history()
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self_len = len(self_history)
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other_history = other.revision_history()
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other_len = len(other_history)
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common_index = min(self_len, other_len) -1
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if common_index >= 0 and \
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self_history[common_index] != other_history[common_index]:
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raise errors.DivergedBranches(self, other)
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if stop_revision is None:
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stop_revision = other_len
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if stop_revision > other_len:
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raise errors.NoSuchRevision(self, stop_revision)
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return other_history[self_len:stop_revision]
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def update_revisions(self, other, stop_revision=None, overwrite=False,
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"""Pull in new perfect-fit revisions.
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:param other: Another Branch to pull from
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:param stop_revision: Updated until the given revision
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:param overwrite: Always set the branch pointer, rather than checking
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to see if it is a proper descendant.
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:param graph: A Graph object that can be used to query history
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information. This can be None.
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other_revno, other_last_revision = other.last_revision_info()
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stop_revno = None # unknown
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if stop_revision is None:
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stop_revision = other_last_revision
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if _mod_revision.is_null(stop_revision):
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# if there are no commits, we're done.
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stop_revno = other_revno
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# what's the current last revision, before we fetch [and change it
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last_rev = _mod_revision.ensure_null(self.last_revision())
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# we fetch here so that we don't process data twice in the common
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# case of having something to pull, and so that the check for
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# already merged can operate on the just fetched graph, which will
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# be cached in memory.
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self.fetch(other, stop_revision)
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# Check to see if one is an ancestor of the other
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graph = self.repository.get_graph()
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heads = graph.heads([stop_revision, last_rev])
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if heads == set([last_rev]):
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# The current revision is a decendent of the target,
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elif heads == set([stop_revision, last_rev]):
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# These branches have diverged
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raise errors.DivergedBranches(self, other)
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elif heads != set([stop_revision]):
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raise AssertionError("invalid heads: %r" % heads)
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if stop_revno is None:
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graph = self.repository.get_graph()
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this_revno, this_last_revision = self.last_revision_info()
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stop_revno = graph.find_distance_to_null(stop_revision,
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[(other_last_revision, other_revno),
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(this_last_revision, this_revno)])
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self.set_last_revision_info(stop_revno, stop_revision)
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def revision_id_to_revno(self, revision_id):
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"""Given a revision id, return its revno"""
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if _mod_revision.is_null(revision_id):
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history = self.revision_history()
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return history.index(revision_id) + 1
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raise errors.NoSuchRevision(self, revision_id)
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def get_rev_id(self, revno, history=None):
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"""Find the revision id of the specified revno."""
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return _mod_revision.NULL_REVISION
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history = self.revision_history()
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if revno <= 0 or revno > len(history):
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raise errors.NoSuchRevision(self, revno)
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return history[revno - 1]
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def pull(self, source, overwrite=False, stop_revision=None,
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possible_transports=None, _override_hook_target=None):
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"""Mirror source into this branch.
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This branch is considered to be 'local', having low latency.
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:returns: PullResult instance
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raise NotImplementedError(self.pull)
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def push(self, target, overwrite=False, stop_revision=None):
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"""Mirror this branch into target.
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This branch is considered to be 'local', having low latency.
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raise NotImplementedError(self.push)
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def basis_tree(self):
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"""Return `Tree` object for last revision."""
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return self.repository.revision_tree(self.last_revision())
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def rename_one(self, from_rel, to_rel):
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This can change the directory or the filename or both.
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raise NotImplementedError(self.rename_one)
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def move(self, from_paths, to_name):
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to_name must exist as a versioned directory.
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If to_name exists and is a directory, the files are moved into
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it, keeping their old names. If it is a directory,
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Note that to_name is only the last component of the new name;
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this doesn't change the directory.
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This returns a list of (from_path, to_path) pairs for each
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raise NotImplementedError(self.move)
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def get_parent(self):
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"""Return the parent location of the branch.
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This is the default location for push/pull/missing. The usual
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pattern is that the user can override it by specifying a
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raise NotImplementedError(self.get_parent)
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def _set_config_location(self, name, url, config=None,
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make_relative=False):
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config = self.get_config()
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url = urlutils.relative_url(self.base, url)
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config.set_user_option(name, url, warn_masked=True)
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def _get_config_location(self, name, config=None):
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config = self.get_config()
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location = config.get_user_option(name)
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def get_submit_branch(self):
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"""Return the submit location of the branch.
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This is the default location for bundle. The usual
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pattern is that the user can override it by specifying a
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return self.get_config().get_user_option('submit_branch')
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def set_submit_branch(self, location):
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"""Return the submit location of the branch.
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This is the default location for bundle. The usual
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pattern is that the user can override it by specifying a
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self.get_config().set_user_option('submit_branch', location,
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def get_public_branch(self):
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"""Return the public location of the branch.
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This is is used by merge directives.
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return self._get_config_location('public_branch')
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def set_public_branch(self, location):
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"""Return the submit location of the branch.
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This is the default location for bundle. The usual
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pattern is that the user can override it by specifying a
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self._set_config_location('public_branch', location)
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def get_push_location(self):
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"""Return the None or the location to push this branch to."""
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push_loc = self.get_config().get_user_option('push_location')
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def set_push_location(self, location):
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"""Set a new push location for this branch."""
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raise NotImplementedError(self.set_push_location)
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def set_parent(self, url):
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raise NotImplementedError(self.set_parent)
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"""Synchronise this branch with the master branch if any.
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:return: None or the last_revision pivoted out during the update.
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def check_revno(self, revno):
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Check whether a revno corresponds to any revision.
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Zero (the NULL revision) is considered valid.
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self.check_real_revno(revno)
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def check_real_revno(self, revno):
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Check whether a revno corresponds to a real revision.
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Zero (the NULL revision) is considered invalid
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if revno < 1 or revno > self.revno():
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raise errors.InvalidRevisionNumber(revno)
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def clone(self, to_bzrdir, revision_id=None):
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"""Clone this branch into to_bzrdir preserving all semantic values.
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revision_id: if not None, the revision history in the new branch will
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be truncated to end with revision_id.
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result = self._format.initialize(to_bzrdir)
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self.copy_content_into(result, revision_id=revision_id)
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def sprout(self, to_bzrdir, revision_id=None):
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"""Create a new line of development from the branch, into to_bzrdir.
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revision_id: if not None, the revision history in the new branch will
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be truncated to end with revision_id.
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result = self._format.initialize(to_bzrdir)
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self.copy_content_into(result, revision_id=revision_id)
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result.set_parent(self.bzrdir.root_transport.base)
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def _synchronize_history(self, destination, revision_id):
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"""Synchronize last revision and revision history between branches.
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This version is most efficient when the destination is also a
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BzrBranch5, but works for BzrBranch6 as long as the revision
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history is the true lefthand parent history, and all of the revisions
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are in the destination's repository. If not, set_revision_history
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:param destination: The branch to copy the history into
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:param revision_id: The revision-id to truncate history at. May
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be None to copy complete history.
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if revision_id == _mod_revision.NULL_REVISION:
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new_history = self.revision_history()
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if revision_id is not None and new_history != []:
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new_history = new_history[:new_history.index(revision_id) + 1]
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rev = self.repository.get_revision(revision_id)
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new_history = rev.get_history(self.repository)[1:]
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destination.set_revision_history(new_history)
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def copy_content_into(self, destination, revision_id=None):
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"""Copy the content of self into destination.
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revision_id: if not None, the revision history in the new branch will
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be truncated to end with revision_id.
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self._synchronize_history(destination, revision_id)
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parent = self.get_parent()
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except errors.InaccessibleParent, e:
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mutter('parent was not accessible to copy: %s', e)
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destination.set_parent(parent)
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self.tags.merge_to(destination.tags)
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"""Check consistency of the branch.
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In particular this checks that revisions given in the revision-history
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do actually match up in the revision graph, and that they're all
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present in the repository.
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Callers will typically also want to check the repository.
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:return: A BranchCheckResult.
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mainline_parent_id = None
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last_revno, last_revision_id = self.last_revision_info()
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real_rev_history = list(self.repository.iter_reverse_revision_history(
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real_rev_history.reverse()
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if len(real_rev_history) != last_revno:
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raise errors.BzrCheckError('revno does not match len(mainline)'
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' %s != %s' % (last_revno, len(real_rev_history)))
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# TODO: We should probably also check that real_rev_history actually
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# matches self.revision_history()
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for revision_id in real_rev_history:
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revision = self.repository.get_revision(revision_id)
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except errors.NoSuchRevision, e:
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raise errors.BzrCheckError("mainline revision {%s} not in repository"
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# In general the first entry on the revision history has no parents.
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# But it's not illegal for it to have parents listed; this can happen
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# in imports from Arch when the parents weren't reachable.
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if mainline_parent_id is not None:
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if mainline_parent_id not in revision.parent_ids:
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raise errors.BzrCheckError("previous revision {%s} not listed among "
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% (mainline_parent_id, revision_id))
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mainline_parent_id = revision_id
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return BranchCheckResult(self)
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def _get_checkout_format(self):
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"""Return the most suitable metadir for a checkout of this branch.
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Weaves are used if this branch's repository uses weaves.
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if isinstance(self.bzrdir, bzrdir.BzrDirPreSplitOut):
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from bzrlib.repofmt import weaverepo
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format = bzrdir.BzrDirMetaFormat1()
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format.repository_format = weaverepo.RepositoryFormat7()
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format = self.repository.bzrdir.checkout_metadir()
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format.set_branch_format(self._format)
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def create_checkout(self, to_location, revision_id=None,
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lightweight=False, accelerator_tree=None,
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"""Create a checkout of a branch.
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:param to_location: The url to produce the checkout at
794
:param revision_id: The revision to check out
795
:param lightweight: If True, produce a lightweight checkout, otherwise,
796
produce a bound branch (heavyweight checkout)
797
:param accelerator_tree: A tree which can be used for retrieving file
798
contents more quickly than the revision tree, i.e. a workingtree.
799
The revision tree will be used for cases where accelerator_tree's
800
content is different.
801
:param hardlink: If true, hard-link files from accelerator_tree,
803
:return: The tree of the created checkout
805
t = transport.get_transport(to_location)
808
format = self._get_checkout_format()
809
checkout = format.initialize_on_transport(t)
810
from_branch = BranchReferenceFormat().initialize(checkout, self)
812
format = self._get_checkout_format()
813
checkout_branch = bzrdir.BzrDir.create_branch_convenience(
814
to_location, force_new_tree=False, format=format)
815
checkout = checkout_branch.bzrdir
816
checkout_branch.bind(self)
817
# pull up to the specified revision_id to set the initial
818
# branch tip correctly, and seed it with history.
819
checkout_branch.pull(self, stop_revision=revision_id)
821
tree = checkout.create_workingtree(revision_id,
822
from_branch=from_branch,
823
accelerator_tree=accelerator_tree,
825
basis_tree = tree.basis_tree()
826
basis_tree.lock_read()
828
for path, file_id in basis_tree.iter_references():
829
reference_parent = self.reference_parent(file_id, path)
830
reference_parent.create_checkout(tree.abspath(path),
831
basis_tree.get_reference_revision(file_id, path),
838
def reconcile(self, thorough=True):
839
"""Make sure the data stored in this branch is consistent."""
840
from bzrlib.reconcile import BranchReconciler
841
reconciler = BranchReconciler(self, thorough=thorough)
842
reconciler.reconcile()
845
def reference_parent(self, file_id, path):
846
"""Return the parent branch for a tree-reference file_id
847
:param file_id: The file_id of the tree reference
848
:param path: The path of the file_id in the tree
849
:return: A branch associated with the file_id
851
# FIXME should provide multiple branches, based on config
852
return Branch.open(self.bzrdir.root_transport.clone(path).base)
854
def supports_tags(self):
855
return self._format.supports_tags()
858
class BranchFormat(object):
859
"""An encapsulation of the initialization and open routines for a format.
861
Formats provide three things:
862
* An initialization routine,
866
Formats are placed in an dict by their format string for reference
867
during branch opening. Its not required that these be instances, they
868
can be classes themselves with class methods - it simply depends on
869
whether state is needed for a given format or not.
871
Once a format is deprecated, just deprecate the initialize and open
872
methods on the format class. Do not deprecate the object, as the
873
object will be created every time regardless.
876
_default_format = None
877
"""The default format used for new branches."""
880
"""The known formats."""
882
def __eq__(self, other):
883
return self.__class__ is other.__class__
885
def __ne__(self, other):
886
return not (self == other)
889
def find_format(klass, a_bzrdir):
890
"""Return the format for the branch object in a_bzrdir."""
892
transport = a_bzrdir.get_branch_transport(None)
893
format_string = transport.get("format").read()
894
return klass._formats[format_string]
895
except errors.NoSuchFile:
896
raise errors.NotBranchError(path=transport.base)
898
raise errors.UnknownFormatError(format=format_string, kind='branch')
901
def get_default_format(klass):
902
"""Return the current default format."""
903
return klass._default_format
905
def get_reference(self, a_bzrdir):
906
"""Get the target reference of the branch in a_bzrdir.
908
format probing must have been completed before calling
909
this method - it is assumed that the format of the branch
910
in a_bzrdir is correct.
912
:param a_bzrdir: The bzrdir to get the branch data from.
913
:return: None if the branch is not a reference branch.
918
def set_reference(self, a_bzrdir, to_branch):
919
"""Set the target reference of the branch in a_bzrdir.
921
format probing must have been completed before calling
922
this method - it is assumed that the format of the branch
923
in a_bzrdir is correct.
925
:param a_bzrdir: The bzrdir to set the branch reference for.
926
:param to_branch: branch that the checkout is to reference
928
raise NotImplementedError(self.set_reference)
930
def get_format_string(self):
931
"""Return the ASCII format string that identifies this format."""
932
raise NotImplementedError(self.get_format_string)
934
def get_format_description(self):
935
"""Return the short format description for this format."""
936
raise NotImplementedError(self.get_format_description)
938
def _initialize_helper(self, a_bzrdir, utf8_files, lock_type='metadir',
940
"""Initialize a branch in a bzrdir, with specified files
942
:param a_bzrdir: The bzrdir to initialize the branch in
943
:param utf8_files: The files to create as a list of
944
(filename, content) tuples
945
:param set_format: If True, set the format with
946
self.get_format_string. (BzrBranch4 has its format set
948
:return: a branch in this format
950
mutter('creating branch %r in %s', self, a_bzrdir.transport.base)
951
branch_transport = a_bzrdir.get_branch_transport(self)
953
'metadir': ('lock', lockdir.LockDir),
954
'branch4': ('branch-lock', lockable_files.TransportLock),
956
lock_name, lock_class = lock_map[lock_type]
957
control_files = lockable_files.LockableFiles(branch_transport,
958
lock_name, lock_class)
959
control_files.create_lock()
960
control_files.lock_write()
962
utf8_files += [('format', self.get_format_string())]
964
for (filename, content) in utf8_files:
965
branch_transport.put_bytes(
967
mode=a_bzrdir._get_file_mode())
969
control_files.unlock()
970
return self.open(a_bzrdir, _found=True)
972
def initialize(self, a_bzrdir):
973
"""Create a branch of this format in a_bzrdir."""
974
raise NotImplementedError(self.initialize)
976
def is_supported(self):
977
"""Is this format supported?
979
Supported formats can be initialized and opened.
980
Unsupported formats may not support initialization or committing or
981
some other features depending on the reason for not being supported.
985
def open(self, a_bzrdir, _found=False):
986
"""Return the branch object for a_bzrdir
988
_found is a private parameter, do not use it. It is used to indicate
989
if format probing has already be done.
991
raise NotImplementedError(self.open)
994
def register_format(klass, format):
995
klass._formats[format.get_format_string()] = format
998
def set_default_format(klass, format):
999
klass._default_format = format
1002
def unregister_format(klass, format):
1003
del klass._formats[format.get_format_string()]
1006
return self.get_format_string().rstrip()
1008
def supports_tags(self):
1009
"""True if this format supports tags stored in the branch"""
1010
return False # by default
1013
class BranchHooks(Hooks):
1014
"""A dictionary mapping hook name to a list of callables for branch hooks.
1016
e.g. ['set_rh'] Is the list of items to be called when the
1017
set_revision_history function is invoked.
1021
"""Create the default hooks.
1023
These are all empty initially, because by default nothing should get
1026
Hooks.__init__(self)
1027
# Introduced in 0.15:
1028
# invoked whenever the revision history has been set
1029
# with set_revision_history. The api signature is
1030
# (branch, revision_history), and the branch will
1033
# invoked after a push operation completes.
1034
# the api signature is
1036
# containing the members
1037
# (source, local, master, old_revno, old_revid, new_revno, new_revid)
1038
# where local is the local target branch or None, master is the target
1039
# master branch, and the rest should be self explanatory. The source
1040
# is read locked and the target branches write locked. Source will
1041
# be the local low-latency branch.
1042
self['post_push'] = []
1043
# invoked after a pull operation completes.
1044
# the api signature is
1046
# containing the members
1047
# (source, local, master, old_revno, old_revid, new_revno, new_revid)
1048
# where local is the local branch or None, master is the target
1049
# master branch, and the rest should be self explanatory. The source
1050
# is read locked and the target branches write locked. The local
1051
# branch is the low-latency branch.
1052
self['post_pull'] = []
1053
# invoked before a commit operation takes place.
1054
# the api signature is
1055
# (local, master, old_revno, old_revid, future_revno, future_revid,
1056
# tree_delta, future_tree).
1057
# old_revid is NULL_REVISION for the first commit to a branch
1058
# tree_delta is a TreeDelta object describing changes from the basis
1059
# revision, hooks MUST NOT modify this delta
1060
# future_tree is an in-memory tree obtained from
1061
# CommitBuilder.revision_tree() and hooks MUST NOT modify this tree
1062
self['pre_commit'] = []
1063
# invoked after a commit operation completes.
1064
# the api signature is
1065
# (local, master, old_revno, old_revid, new_revno, new_revid)
1066
# old_revid is NULL_REVISION for the first commit to a branch.
1067
self['post_commit'] = []
1068
# invoked after a uncommit operation completes.
1069
# the api signature is
1070
# (local, master, old_revno, old_revid, new_revno, new_revid) where
1071
# local is the local branch or None, master is the target branch,
1072
# and an empty branch recieves new_revno of 0, new_revid of None.
1073
self['post_uncommit'] = []
1075
# Invoked after the tip of a branch changes.
1076
# the api signature is
1077
# (params) where params is a ChangeBranchTipParams with the members
1078
# (branch, old_revno, new_revno, old_revid, new_revid)
1079
self['post_change_branch_tip'] = []
1082
# install the default hooks into the Branch class.
1083
Branch.hooks = BranchHooks()
1086
class ChangeBranchTipParams(object):
1087
"""Object holding parameters passed to *_change_branch_tip hooks.
1089
There are 5 fields that hooks may wish to access:
1091
:ivar branch: the branch being changed
1092
:ivar old_revno: revision number before the change
1093
:ivar new_revno: revision number after the change
1094
:ivar old_revid: revision id before the change
1095
:ivar new_revid: revision id after the change
1097
The revid fields are strings. The revno fields are integers.
1100
def __init__(self, branch, old_revno, new_revno, old_revid, new_revid):
1101
"""Create a group of ChangeBranchTip parameters.
1103
:param branch: The branch being changed.
1104
:param old_revno: Revision number before the change.
1105
:param new_revno: Revision number after the change.
1106
:param old_revid: Tip revision id before the change.
1107
:param new_revid: Tip revision id after the change.
1109
self.branch = branch
1110
self.old_revno = old_revno
1111
self.new_revno = new_revno
1112
self.old_revid = old_revid
1113
self.new_revid = new_revid
1116
class BzrBranchFormat4(BranchFormat):
1117
"""Bzr branch format 4.
1120
- a revision-history file.
1121
- a branch-lock lock file [ to be shared with the bzrdir ]
1124
def get_format_description(self):
1125
"""See BranchFormat.get_format_description()."""
1126
return "Branch format 4"
1128
def initialize(self, a_bzrdir):
1129
"""Create a branch of this format in a_bzrdir."""
1130
utf8_files = [('revision-history', ''),
1131
('branch-name', ''),
1133
return self._initialize_helper(a_bzrdir, utf8_files,
1134
lock_type='branch4', set_format=False)
1137
super(BzrBranchFormat4, self).__init__()
1138
self._matchingbzrdir = bzrdir.BzrDirFormat6()
1140
def open(self, a_bzrdir, _found=False):
1141
"""Return the branch object for a_bzrdir
1143
_found is a private parameter, do not use it. It is used to indicate
1144
if format probing has already be done.
1147
# we are being called directly and must probe.
1148
raise NotImplementedError
1149
return BzrBranch(_format=self,
1150
_control_files=a_bzrdir._control_files,
1152
_repository=a_bzrdir.open_repository())
1155
return "Bazaar-NG branch format 4"
1158
class BzrBranchFormat5(BranchFormat):
1159
"""Bzr branch format 5.
1162
- a revision-history file.
1164
- a lock dir guarding the branch itself
1165
- all of this stored in a branch/ subdirectory
1166
- works with shared repositories.
1168
This format is new in bzr 0.8.
1171
def get_format_string(self):
1172
"""See BranchFormat.get_format_string()."""
1173
return "Bazaar-NG branch format 5\n"
1175
def get_format_description(self):
1176
"""See BranchFormat.get_format_description()."""
1177
return "Branch format 5"
1179
def initialize(self, a_bzrdir):
1180
"""Create a branch of this format in a_bzrdir."""
1181
utf8_files = [('revision-history', ''),
1182
('branch-name', ''),
1184
return self._initialize_helper(a_bzrdir, utf8_files)
1187
super(BzrBranchFormat5, self).__init__()
1188
self._matchingbzrdir = bzrdir.BzrDirMetaFormat1()
1190
def open(self, a_bzrdir, _found=False):
1191
"""Return the branch object for a_bzrdir
1193
_found is a private parameter, do not use it. It is used to indicate
1194
if format probing has already be done.
1197
format = BranchFormat.find_format(a_bzrdir)
1198
if format.__class__ != self.__class__:
1199
raise AssertionError("wrong format %r found for %r" %
1202
transport = a_bzrdir.get_branch_transport(None)
1203
control_files = lockable_files.LockableFiles(transport, 'lock',
1205
return BzrBranch5(_format=self,
1206
_control_files=control_files,
1208
_repository=a_bzrdir.find_repository())
1209
except errors.NoSuchFile:
1210
raise errors.NotBranchError(path=transport.base)
1213
class BzrBranchFormat6(BzrBranchFormat5):
1214
"""Branch format with last-revision and tags.
1216
Unlike previous formats, this has no explicit revision history. Instead,
1217
this just stores the last-revision, and the left-hand history leading
1218
up to there is the history.
1220
This format was introduced in bzr 0.15
1221
and became the default in 0.91.
1224
def get_format_string(self):
1225
"""See BranchFormat.get_format_string()."""
1226
return "Bazaar Branch Format 6 (bzr 0.15)\n"
1228
def get_format_description(self):
1229
"""See BranchFormat.get_format_description()."""
1230
return "Branch format 6"
1232
def initialize(self, a_bzrdir):
1233
"""Create a branch of this format in a_bzrdir."""
1234
utf8_files = [('last-revision', '0 null:\n'),
1235
('branch.conf', ''),
1238
return self._initialize_helper(a_bzrdir, utf8_files)
1240
def open(self, a_bzrdir, _found=False):
1241
"""Return the branch object for a_bzrdir
1243
_found is a private parameter, do not use it. It is used to indicate
1244
if format probing has already be done.
1247
format = BranchFormat.find_format(a_bzrdir)
1248
if format.__class__ != self.__class__:
1249
raise AssertionError("wrong format %r found for %r" %
1251
transport = a_bzrdir.get_branch_transport(None)
1252
control_files = lockable_files.LockableFiles(transport, 'lock',
1254
return BzrBranch6(_format=self,
1255
_control_files=control_files,
1257
_repository=a_bzrdir.find_repository())
1259
def supports_tags(self):
1263
class BranchReferenceFormat(BranchFormat):
1264
"""Bzr branch reference format.
1266
Branch references are used in implementing checkouts, they
1267
act as an alias to the real branch which is at some other url.
1274
def get_format_string(self):
1275
"""See BranchFormat.get_format_string()."""
1276
return "Bazaar-NG Branch Reference Format 1\n"
1278
def get_format_description(self):
1279
"""See BranchFormat.get_format_description()."""
1280
return "Checkout reference format 1"
1282
def get_reference(self, a_bzrdir):
1283
"""See BranchFormat.get_reference()."""
1284
transport = a_bzrdir.get_branch_transport(None)
1285
return transport.get('location').read()
1287
def set_reference(self, a_bzrdir, to_branch):
1288
"""See BranchFormat.set_reference()."""
1289
transport = a_bzrdir.get_branch_transport(None)
1290
location = transport.put_bytes('location', to_branch.base)
1292
def initialize(self, a_bzrdir, target_branch=None):
1293
"""Create a branch of this format in a_bzrdir."""
1294
if target_branch is None:
1295
# this format does not implement branch itself, thus the implicit
1296
# creation contract must see it as uninitializable
1297
raise errors.UninitializableFormat(self)
1298
mutter('creating branch reference in %s', a_bzrdir.transport.base)
1299
branch_transport = a_bzrdir.get_branch_transport(self)
1300
branch_transport.put_bytes('location',
1301
target_branch.bzrdir.root_transport.base)
1302
branch_transport.put_bytes('format', self.get_format_string())
1304
a_bzrdir, _found=True,
1305
possible_transports=[target_branch.bzrdir.root_transport])
1308
super(BranchReferenceFormat, self).__init__()
1309
self._matchingbzrdir = bzrdir.BzrDirMetaFormat1()
1311
def _make_reference_clone_function(format, a_branch):
1312
"""Create a clone() routine for a branch dynamically."""
1313
def clone(to_bzrdir, revision_id=None):
1314
"""See Branch.clone()."""
1315
return format.initialize(to_bzrdir, a_branch)
1316
# cannot obey revision_id limits when cloning a reference ...
1317
# FIXME RBC 20060210 either nuke revision_id for clone, or
1318
# emit some sort of warning/error to the caller ?!
1321
def open(self, a_bzrdir, _found=False, location=None,
1322
possible_transports=None):
1323
"""Return the branch that the branch reference in a_bzrdir points at.
1325
_found is a private parameter, do not use it. It is used to indicate
1326
if format probing has already be done.
1329
format = BranchFormat.find_format(a_bzrdir)
1330
if format.__class__ != self.__class__:
1331
raise AssertionError("wrong format %r found for %r" %
1333
if location is None:
1334
location = self.get_reference(a_bzrdir)
1335
real_bzrdir = bzrdir.BzrDir.open(
1336
location, possible_transports=possible_transports)
1337
result = real_bzrdir.open_branch()
1338
# this changes the behaviour of result.clone to create a new reference
1339
# rather than a copy of the content of the branch.
1340
# I did not use a proxy object because that needs much more extensive
1341
# testing, and we are only changing one behaviour at the moment.
1342
# If we decide to alter more behaviours - i.e. the implicit nickname
1343
# then this should be refactored to introduce a tested proxy branch
1344
# and a subclass of that for use in overriding clone() and ....
1346
result.clone = self._make_reference_clone_function(result)
1350
# formats which have no format string are not discoverable
1351
# and not independently creatable, so are not registered.
1352
__format5 = BzrBranchFormat5()
1353
__format6 = BzrBranchFormat6()
1354
BranchFormat.register_format(__format5)
1355
BranchFormat.register_format(BranchReferenceFormat())
1356
BranchFormat.register_format(__format6)
1357
BranchFormat.set_default_format(__format6)
1358
_legacy_formats = [BzrBranchFormat4(),
1361
class BzrBranch(Branch):
1362
"""A branch stored in the actual filesystem.
1364
Note that it's "local" in the context of the filesystem; it doesn't
1365
really matter if it's on an nfs/smb/afs/coda/... share, as long as
1366
it's writable, and can be accessed via the normal filesystem API.
1368
:ivar _transport: Transport for file operations on this branch's
1369
control files, typically pointing to the .bzr/branch directory.
1370
:ivar repository: Repository for this branch.
1371
:ivar base: The url of the base directory for this branch; the one
1372
containing the .bzr directory.
1375
def __init__(self, _format=None,
1376
_control_files=None, a_bzrdir=None, _repository=None):
1377
"""Create new branch object at a particular location."""
1378
Branch.__init__(self)
1379
if a_bzrdir is None:
1380
raise ValueError('a_bzrdir must be supplied')
1382
self.bzrdir = a_bzrdir
1383
self._base = self.bzrdir.transport.clone('..').base
1384
# XXX: We should be able to just do
1385
# self.base = self.bzrdir.root_transport.base
1386
# but this does not quite work yet -- mbp 20080522
1387
self._format = _format
1388
if _control_files is None:
1389
raise ValueError('BzrBranch _control_files is None')
1390
self.control_files = _control_files
1391
self._transport = _control_files._transport
1392
self.repository = _repository
1395
return '%s(%r)' % (self.__class__.__name__, self.base)
1399
def _get_base(self):
1400
"""Returns the directory containing the control directory."""
1403
base = property(_get_base, doc="The URL for the root of this branch.")
1405
@deprecated_method(deprecated_in((0, 16, 0)))
1406
def abspath(self, name):
1407
"""See Branch.abspath."""
1408
return self._transport.abspath(name)
1410
def is_locked(self):
1411
return self.control_files.is_locked()
1413
def lock_write(self, token=None):
1414
repo_token = self.repository.lock_write()
1416
token = self.control_files.lock_write(token=token)
1418
self.repository.unlock()
1422
def lock_read(self):
1423
self.repository.lock_read()
1425
self.control_files.lock_read()
1427
self.repository.unlock()
1431
# TODO: test for failed two phase locks. This is known broken.
1433
self.control_files.unlock()
1435
self.repository.unlock()
1436
if not self.control_files.is_locked():
1437
# we just released the lock
1438
self._clear_cached_state()
1440
def peek_lock_mode(self):
1441
if self.control_files._lock_count == 0:
1444
return self.control_files._lock_mode
1446
def get_physical_lock_status(self):
1447
return self.control_files.get_physical_lock_status()
1450
def print_file(self, file, revision_id):
1451
"""See Branch.print_file."""
1452
return self.repository.print_file(file, revision_id)
1454
def _write_revision_history(self, history):
1455
"""Factored out of set_revision_history.
1457
This performs the actual writing to disk.
1458
It is intended to be called by BzrBranch5.set_revision_history."""
1459
self._transport.put_bytes(
1460
'revision-history', '\n'.join(history),
1461
mode=self.bzrdir._get_file_mode())
1464
def set_revision_history(self, rev_history):
1465
"""See Branch.set_revision_history."""
1466
if 'evil' in debug.debug_flags:
1467
mutter_callsite(3, "set_revision_history scales with history.")
1468
check_not_reserved_id = _mod_revision.check_not_reserved_id
1469
for rev_id in rev_history:
1470
check_not_reserved_id(rev_id)
1471
self._write_revision_history(rev_history)
1472
self._clear_cached_state()
1473
self._cache_revision_history(rev_history)
1474
for hook in Branch.hooks['set_rh']:
1475
hook(self, rev_history)
1477
def _run_post_change_branch_tip_hooks(self, old_revno, old_revid):
1478
"""Run the post_change_branch_tip hooks."""
1479
hooks = Branch.hooks['post_change_branch_tip']
1482
new_revno, new_revid = self.last_revision_info()
1483
params = ChangeBranchTipParams(
1484
self, old_revno, new_revno, old_revid, new_revid)
1489
def set_last_revision_info(self, revno, revision_id):
1490
"""Set the last revision of this branch.
1492
The caller is responsible for checking that the revno is correct
1493
for this revision id.
1495
It may be possible to set the branch last revision to an id not
1496
present in the repository. However, branches can also be
1497
configured to check constraints on history, in which case this may not
1500
revision_id = _mod_revision.ensure_null(revision_id)
1501
old_revno, old_revid = self.last_revision_info()
1502
# this old format stores the full history, but this api doesn't
1503
# provide it, so we must generate, and might as well check it's
1505
history = self._lefthand_history(revision_id)
1506
if len(history) != revno:
1507
raise AssertionError('%d != %d' % (len(history), revno))
1508
self.set_revision_history(history)
1509
self._run_post_change_branch_tip_hooks(old_revno, old_revid)
1511
def _gen_revision_history(self):
1512
history = self._transport.get_bytes('revision-history').split('\n')
1513
if history[-1:] == ['']:
1514
# There shouldn't be a trailing newline, but just in case.
1518
def _lefthand_history(self, revision_id, last_rev=None,
1520
if 'evil' in debug.debug_flags:
1521
mutter_callsite(4, "_lefthand_history scales with history.")
1522
# stop_revision must be a descendant of last_revision
1523
graph = self.repository.get_graph()
1524
if last_rev is not None:
1525
if not graph.is_ancestor(last_rev, revision_id):
1526
# our previous tip is not merged into stop_revision
1527
raise errors.DivergedBranches(self, other_branch)
1528
# make a new revision history from the graph
1529
parents_map = graph.get_parent_map([revision_id])
1530
if revision_id not in parents_map:
1531
raise errors.NoSuchRevision(self, revision_id)
1532
current_rev_id = revision_id
1534
check_not_reserved_id = _mod_revision.check_not_reserved_id
1535
# Do not include ghosts or graph origin in revision_history
1536
while (current_rev_id in parents_map and
1537
len(parents_map[current_rev_id]) > 0):
1538
check_not_reserved_id(current_rev_id)
1539
new_history.append(current_rev_id)
1540
current_rev_id = parents_map[current_rev_id][0]
1541
parents_map = graph.get_parent_map([current_rev_id])
1542
new_history.reverse()
1546
def generate_revision_history(self, revision_id, last_rev=None,
1548
"""Create a new revision history that will finish with revision_id.
1550
:param revision_id: the new tip to use.
1551
:param last_rev: The previous last_revision. If not None, then this
1552
must be a ancestory of revision_id, or DivergedBranches is raised.
1553
:param other_branch: The other branch that DivergedBranches should
1554
raise with respect to.
1556
self.set_revision_history(self._lefthand_history(revision_id,
1557
last_rev, other_branch))
1559
def basis_tree(self):
1560
"""See Branch.basis_tree."""
1561
return self.repository.revision_tree(self.last_revision())
1564
def pull(self, source, overwrite=False, stop_revision=None,
1565
_hook_master=None, run_hooks=True, possible_transports=None,
1566
_override_hook_target=None):
1569
:param _hook_master: Private parameter - set the branch to
1570
be supplied as the master to pull hooks.
1571
:param run_hooks: Private parameter - if false, this branch
1572
is being called because it's the master of the primary branch,
1573
so it should not run its hooks.
1574
:param _override_hook_target: Private parameter - set the branch to be
1575
supplied as the target_branch to pull hooks.
1577
result = PullResult()
1578
result.source_branch = source
1579
if _override_hook_target is None:
1580
result.target_branch = self
1582
result.target_branch = _override_hook_target
1585
# We assume that during 'pull' the local repository is closer than
1587
graph = self.repository.get_graph(source.repository)
1588
result.old_revno, result.old_revid = self.last_revision_info()
1589
self.update_revisions(source, stop_revision, overwrite=overwrite,
1591
result.tag_conflicts = source.tags.merge_to(self.tags, overwrite)
1592
result.new_revno, result.new_revid = self.last_revision_info()
1594
result.master_branch = _hook_master
1595
result.local_branch = result.target_branch
1597
result.master_branch = result.target_branch
1598
result.local_branch = None
1600
for hook in Branch.hooks['post_pull']:
1606
def _get_parent_location(self):
1607
_locs = ['parent', 'pull', 'x-pull']
1610
return self._transport.get_bytes(l).strip('\n')
1611
except errors.NoSuchFile:
1616
def push(self, target, overwrite=False, stop_revision=None,
1617
_override_hook_source_branch=None):
1620
This is the basic concrete implementation of push()
1622
:param _override_hook_source_branch: If specified, run
1623
the hooks passing this Branch as the source, rather than self.
1624
This is for use of RemoteBranch, where push is delegated to the
1625
underlying vfs-based Branch.
1627
# TODO: Public option to disable running hooks - should be trivial but
1631
result = self._push_with_bound_branches(target, overwrite,
1633
_override_hook_source_branch=_override_hook_source_branch)
1638
def _push_with_bound_branches(self, target, overwrite,
1640
_override_hook_source_branch=None):
1641
"""Push from self into target, and into target's master if any.
1643
This is on the base BzrBranch class even though it doesn't support
1644
bound branches because the *target* might be bound.
1647
if _override_hook_source_branch:
1648
result.source_branch = _override_hook_source_branch
1649
for hook in Branch.hooks['post_push']:
1652
bound_location = target.get_bound_location()
1653
if bound_location and target.base != bound_location:
1654
# there is a master branch.
1656
# XXX: Why the second check? Is it even supported for a branch to
1657
# be bound to itself? -- mbp 20070507
1658
master_branch = target.get_master_branch()
1659
master_branch.lock_write()
1661
# push into the master from this branch.
1662
self._basic_push(master_branch, overwrite, stop_revision)
1663
# and push into the target branch from this. Note that we push from
1664
# this branch again, because its considered the highest bandwidth
1666
result = self._basic_push(target, overwrite, stop_revision)
1667
result.master_branch = master_branch
1668
result.local_branch = target
1672
master_branch.unlock()
1675
result = self._basic_push(target, overwrite, stop_revision)
1676
# TODO: Why set master_branch and local_branch if there's no
1677
# binding? Maybe cleaner to just leave them unset? -- mbp
1679
result.master_branch = target
1680
result.local_branch = None
1684
def _basic_push(self, target, overwrite, stop_revision):
1685
"""Basic implementation of push without bound branches or hooks.
1687
Must be called with self read locked and target write locked.
1689
result = PushResult()
1690
result.source_branch = self
1691
result.target_branch = target
1692
result.old_revno, result.old_revid = target.last_revision_info()
1694
# We assume that during 'push' this repository is closer than
1696
graph = self.repository.get_graph(target.repository)
1697
target.update_revisions(self, stop_revision, overwrite=overwrite,
1699
result.tag_conflicts = self.tags.merge_to(target.tags, overwrite)
1700
result.new_revno, result.new_revid = target.last_revision_info()
1703
def get_parent(self):
1704
"""See Branch.get_parent."""
1705
parent = self._get_parent_location()
1708
# This is an old-format absolute path to a local branch
1709
# turn it into a url
1710
if parent.startswith('/'):
1711
parent = urlutils.local_path_to_url(parent.decode('utf8'))
1713
return urlutils.join(self.base[:-1], parent)
1714
except errors.InvalidURLJoin, e:
1715
raise errors.InaccessibleParent(parent, self.base)
1717
def set_push_location(self, location):
1718
"""See Branch.set_push_location."""
1719
self.get_config().set_user_option(
1720
'push_location', location,
1721
store=_mod_config.STORE_LOCATION_NORECURSE)
1724
def set_parent(self, url):
1725
"""See Branch.set_parent."""
1726
# TODO: Maybe delete old location files?
1727
# URLs should never be unicode, even on the local fs,
1728
# FIXUP this and get_parent in a future branch format bump:
1729
# read and rewrite the file. RBC 20060125
1731
if isinstance(url, unicode):
1733
url = url.encode('ascii')
1734
except UnicodeEncodeError:
1735
raise errors.InvalidURL(url,
1736
"Urls must be 7-bit ascii, "
1737
"use bzrlib.urlutils.escape")
1738
url = urlutils.relative_url(self.base, url)
1739
self._set_parent_location(url)
1741
def _set_parent_location(self, url):
1743
self._transport.delete('parent')
1745
self._transport.put_bytes('parent', url + '\n',
1746
mode=self.bzrdir._get_file_mode())
1749
class BzrBranch5(BzrBranch):
1750
"""A format 5 branch. This supports new features over plain branches.
1752
It has support for a master_branch which is the data for bound branches.
1760
super(BzrBranch5, self).__init__(_format=_format,
1761
_control_files=_control_files,
1763
_repository=_repository)
1766
def pull(self, source, overwrite=False, stop_revision=None,
1767
run_hooks=True, possible_transports=None,
1768
_override_hook_target=None):
1769
"""Pull from source into self, updating my master if any.
1771
:param run_hooks: Private parameter - if false, this branch
1772
is being called because it's the master of the primary branch,
1773
so it should not run its hooks.
1775
bound_location = self.get_bound_location()
1776
master_branch = None
1777
if bound_location and source.base != bound_location:
1778
# not pulling from master, so we need to update master.
1779
master_branch = self.get_master_branch(possible_transports)
1780
master_branch.lock_write()
1783
# pull from source into master.
1784
master_branch.pull(source, overwrite, stop_revision,
1786
return super(BzrBranch5, self).pull(source, overwrite,
1787
stop_revision, _hook_master=master_branch,
1788
run_hooks=run_hooks,
1789
_override_hook_target=_override_hook_target)
1792
master_branch.unlock()
1794
def get_bound_location(self):
1796
return self._transport.get_bytes('bound')[:-1]
1797
except errors.NoSuchFile:
1801
def get_master_branch(self, possible_transports=None):
1802
"""Return the branch we are bound to.
1804
:return: Either a Branch, or None
1806
This could memoise the branch, but if thats done
1807
it must be revalidated on each new lock.
1808
So for now we just don't memoise it.
1809
# RBC 20060304 review this decision.
1811
bound_loc = self.get_bound_location()
1815
return Branch.open(bound_loc,
1816
possible_transports=possible_transports)
1817
except (errors.NotBranchError, errors.ConnectionError), e:
1818
raise errors.BoundBranchConnectionFailure(
1822
def set_bound_location(self, location):
1823
"""Set the target where this branch is bound to.
1825
:param location: URL to the target branch
1828
self._transport.put_bytes('bound', location+'\n',
1829
mode=self.bzrdir._get_file_mode())
1832
self._transport.delete('bound')
1833
except errors.NoSuchFile:
1838
def bind(self, other):
1839
"""Bind this branch to the branch other.
1841
This does not push or pull data between the branches, though it does
1842
check for divergence to raise an error when the branches are not
1843
either the same, or one a prefix of the other. That behaviour may not
1844
be useful, so that check may be removed in future.
1846
:param other: The branch to bind to
1849
# TODO: jam 20051230 Consider checking if the target is bound
1850
# It is debatable whether you should be able to bind to
1851
# a branch which is itself bound.
1852
# Committing is obviously forbidden,
1853
# but binding itself may not be.
1854
# Since we *have* to check at commit time, we don't
1855
# *need* to check here
1857
# we want to raise diverged if:
1858
# last_rev is not in the other_last_rev history, AND
1859
# other_last_rev is not in our history, and do it without pulling
1861
self.set_bound_location(other.base)
1865
"""If bound, unbind"""
1866
return self.set_bound_location(None)
1869
def update(self, possible_transports=None):
1870
"""Synchronise this branch with the master branch if any.
1872
:return: None or the last_revision that was pivoted out during the
1875
master = self.get_master_branch(possible_transports)
1876
if master is not None:
1877
old_tip = _mod_revision.ensure_null(self.last_revision())
1878
self.pull(master, overwrite=True)
1879
if self.repository.get_graph().is_ancestor(old_tip,
1880
_mod_revision.ensure_null(self.last_revision())):
1886
class BzrBranch6(BzrBranch5):
1888
def __init__(self, *args, **kwargs):
1889
super(BzrBranch6, self).__init__(*args, **kwargs)
1890
self._last_revision_info_cache = None
1891
self._partial_revision_history_cache = []
1893
def _clear_cached_state(self):
1894
super(BzrBranch6, self)._clear_cached_state()
1895
self._last_revision_info_cache = None
1896
self._partial_revision_history_cache = []
1899
def last_revision_info(self):
1900
"""Return information about the last revision.
1902
:return: A tuple (revno, revision_id).
1904
if self._last_revision_info_cache is None:
1905
self._last_revision_info_cache = self._last_revision_info()
1906
return self._last_revision_info_cache
1908
def _last_revision_info(self):
1909
revision_string = self._transport.get_bytes('last-revision')
1910
revno, revision_id = revision_string.rstrip('\n').split(' ', 1)
1911
revision_id = cache_utf8.get_cached_utf8(revision_id)
1913
return revno, revision_id
1915
def _write_last_revision_info(self, revno, revision_id):
1916
"""Simply write out the revision id, with no checks.
1918
Use set_last_revision_info to perform this safely.
1920
Does not update the revision_history cache.
1921
Intended to be called by set_last_revision_info and
1922
_write_revision_history.
1924
revision_id = _mod_revision.ensure_null(revision_id)
1925
out_string = '%d %s\n' % (revno, revision_id)
1926
self._transport.put_bytes('last-revision', out_string,
1927
mode=self.bzrdir._get_file_mode())
1930
def set_last_revision_info(self, revno, revision_id):
1931
revision_id = _mod_revision.ensure_null(revision_id)
1932
old_revno, old_revid = self.last_revision_info()
1933
if self._get_append_revisions_only():
1934
self._check_history_violation(revision_id)
1935
self._write_last_revision_info(revno, revision_id)
1936
self._clear_cached_state()
1937
self._last_revision_info_cache = revno, revision_id
1938
self._run_post_change_branch_tip_hooks(old_revno, old_revid)
1940
def _check_history_violation(self, revision_id):
1941
last_revision = _mod_revision.ensure_null(self.last_revision())
1942
if _mod_revision.is_null(last_revision):
1944
if last_revision not in self._lefthand_history(revision_id):
1945
raise errors.AppendRevisionsOnlyViolation(self.base)
1947
def _gen_revision_history(self):
1948
"""Generate the revision history from last revision
1950
last_revno, last_revision = self.last_revision_info()
1951
self._extend_partial_history(stop_index=last_revno-1)
1952
return list(reversed(self._partial_revision_history_cache))
1954
def _extend_partial_history(self, stop_index=None, stop_revision=None):
1955
"""Extend the partial history to include a given index
1957
If a stop_index is supplied, stop when that index has been reached.
1958
If a stop_revision is supplied, stop when that revision is
1959
encountered. Otherwise, stop when the beginning of history is
1962
:param stop_index: The index which should be present. When it is
1963
present, history extension will stop.
1964
:param revision_id: The revision id which should be present. When
1965
it is encountered, history extension will stop.
1967
repo = self.repository
1968
if len(self._partial_revision_history_cache) == 0:
1969
iterator = repo.iter_reverse_revision_history(self.last_revision())
1971
start_revision = self._partial_revision_history_cache[-1]
1972
iterator = repo.iter_reverse_revision_history(start_revision)
1973
#skip the last revision in the list
1974
next_revision = iterator.next()
1975
for revision_id in iterator:
1976
self._partial_revision_history_cache.append(revision_id)
1977
if (stop_index is not None and
1978
len(self._partial_revision_history_cache) > stop_index):
1980
if revision_id == stop_revision:
1983
def _write_revision_history(self, history):
1984
"""Factored out of set_revision_history.
1986
This performs the actual writing to disk, with format-specific checks.
1987
It is intended to be called by BzrBranch5.set_revision_history.
1989
if len(history) == 0:
1990
last_revision = 'null:'
1992
if history != self._lefthand_history(history[-1]):
1993
raise errors.NotLefthandHistory(history)
1994
last_revision = history[-1]
1995
if self._get_append_revisions_only():
1996
self._check_history_violation(last_revision)
1997
self._write_last_revision_info(len(history), last_revision)
2000
def _set_parent_location(self, url):
2001
"""Set the parent branch"""
2002
self._set_config_location('parent_location', url, make_relative=True)
2005
def _get_parent_location(self):
2006
"""Set the parent branch"""
2007
return self._get_config_location('parent_location')
2009
def set_push_location(self, location):
2010
"""See Branch.set_push_location."""
2011
self._set_config_location('push_location', location)
2013
def set_bound_location(self, location):
2014
"""See Branch.set_push_location."""
2016
config = self.get_config()
2017
if location is None:
2018
if config.get_user_option('bound') != 'True':
2021
config.set_user_option('bound', 'False', warn_masked=True)
2024
self._set_config_location('bound_location', location,
2026
config.set_user_option('bound', 'True', warn_masked=True)
2029
def _get_bound_location(self, bound):
2030
"""Return the bound location in the config file.
2032
Return None if the bound parameter does not match"""
2033
config = self.get_config()
2034
config_bound = (config.get_user_option('bound') == 'True')
2035
if config_bound != bound:
2037
return self._get_config_location('bound_location', config=config)
2039
def get_bound_location(self):
2040
"""See Branch.set_push_location."""
2041
return self._get_bound_location(True)
2043
def get_old_bound_location(self):
2044
"""See Branch.get_old_bound_location"""
2045
return self._get_bound_location(False)
2047
def set_append_revisions_only(self, enabled):
2052
self.get_config().set_user_option('append_revisions_only', value,
2055
def _get_append_revisions_only(self):
2056
value = self.get_config().get_user_option('append_revisions_only')
2057
return value == 'True'
2059
def _synchronize_history(self, destination, revision_id):
2060
"""Synchronize last revision and revision history between branches.
2062
This version is most efficient when the destination is also a
2063
BzrBranch6, but works for BzrBranch5, as long as the destination's
2064
repository contains all the lefthand ancestors of the intended
2065
last_revision. If not, set_last_revision_info will fail.
2067
:param destination: The branch to copy the history into
2068
:param revision_id: The revision-id to truncate history at. May
2069
be None to copy complete history.
2071
source_revno, source_revision_id = self.last_revision_info()
2072
if revision_id is None:
2073
revno, revision_id = source_revno, source_revision_id
2074
elif source_revision_id == revision_id:
2075
# we know the revno without needing to walk all of history
2076
revno = source_revno
2078
# To figure out the revno for a random revision, we need to build
2079
# the revision history, and count its length.
2080
# We don't care about the order, just how long it is.
2081
# Alternatively, we could start at the current location, and count
2082
# backwards. But there is no guarantee that we will find it since
2083
# it may be a merged revision.
2084
revno = len(list(self.repository.iter_reverse_revision_history(
2086
destination.set_last_revision_info(revno, revision_id)
2088
def _make_tags(self):
2089
return BasicTags(self)
2092
def generate_revision_history(self, revision_id, last_rev=None,
2094
"""See BzrBranch5.generate_revision_history"""
2095
history = self._lefthand_history(revision_id, last_rev, other_branch)
2096
revno = len(history)
2097
self.set_last_revision_info(revno, revision_id)
2100
def get_rev_id(self, revno, history=None):
2101
"""Find the revision id of the specified revno."""
2103
return _mod_revision.NULL_REVISION
2105
last_revno, last_revision_id = self.last_revision_info()
2106
if revno <= 0 or revno > last_revno:
2107
raise errors.NoSuchRevision(self, revno)
2109
if history is not None:
2110
return history[revno - 1]
2112
index = last_revno - revno
2113
if len(self._partial_revision_history_cache) <= index:
2114
self._extend_partial_history(stop_index=index)
2115
if len(self._partial_revision_history_cache) > index:
2116
return self._partial_revision_history_cache[index]
2118
raise errors.NoSuchRevision(self, revno)
2121
def revision_id_to_revno(self, revision_id):
2122
"""Given a revision id, return its revno"""
2123
if _mod_revision.is_null(revision_id):
2126
index = self._partial_revision_history_cache.index(revision_id)
2128
self._extend_partial_history(stop_revision=revision_id)
2129
index = len(self._partial_revision_history_cache) - 1
2130
if self._partial_revision_history_cache[index] != revision_id:
2131
raise errors.NoSuchRevision(self, revision_id)
2132
return self.revno() - index
2135
######################################################################
2136
# results of operations
2139
class _Result(object):
2141
def _show_tag_conficts(self, to_file):
2142
if not getattr(self, 'tag_conflicts', None):
2144
to_file.write('Conflicting tags:\n')
2145
for name, value1, value2 in self.tag_conflicts:
2146
to_file.write(' %s\n' % (name, ))
2149
class PullResult(_Result):
2150
"""Result of a Branch.pull operation.
2152
:ivar old_revno: Revision number before pull.
2153
:ivar new_revno: Revision number after pull.
2154
:ivar old_revid: Tip revision id before pull.
2155
:ivar new_revid: Tip revision id after pull.
2156
:ivar source_branch: Source (local) branch object.
2157
:ivar master_branch: Master branch of the target, or the target if no
2159
:ivar local_branch: target branch if there is a Master, else None
2160
:ivar target_branch: Target/destination branch object.
2161
:ivar tag_conflicts: A list of tag conflicts, see BasicTags.merge_to
2165
# DEPRECATED: pull used to return the change in revno
2166
return self.new_revno - self.old_revno
2168
def report(self, to_file):
2170
if self.old_revid == self.new_revid:
2171
to_file.write('No revisions to pull.\n')
2173
to_file.write('Now on revision %d.\n' % self.new_revno)
2174
self._show_tag_conficts(to_file)
2177
class PushResult(_Result):
2178
"""Result of a Branch.push operation.
2180
:ivar old_revno: Revision number before push.
2181
:ivar new_revno: Revision number after push.
2182
:ivar old_revid: Tip revision id before push.
2183
:ivar new_revid: Tip revision id after push.
2184
:ivar source_branch: Source branch object.
2185
:ivar master_branch: Master branch of the target, or None.
2186
:ivar target_branch: Target/destination branch object.
2190
# DEPRECATED: push used to return the change in revno
2191
return self.new_revno - self.old_revno
2193
def report(self, to_file):
2194
"""Write a human-readable description of the result."""
2195
if self.old_revid == self.new_revid:
2196
to_file.write('No new revisions to push.\n')
2198
to_file.write('Pushed up to revision %d.\n' % self.new_revno)
2199
self._show_tag_conficts(to_file)
2202
class BranchCheckResult(object):
2203
"""Results of checking branch consistency.
2208
def __init__(self, branch):
2209
self.branch = branch
2211
def report_results(self, verbose):
2212
"""Report the check results via trace.note.
2214
:param verbose: Requests more detailed display of what was checked,
2217
note('checked branch %s format %s',
2219
self.branch._format)
2222
class Converter5to6(object):
2223
"""Perform an in-place upgrade of format 5 to format 6"""
2225
def convert(self, branch):
2226
# Data for 5 and 6 can peacefully coexist.
2227
format = BzrBranchFormat6()
2228
new_branch = format.open(branch.bzrdir, _found=True)
2230
# Copy source data into target
2231
new_branch._write_last_revision_info(*branch.last_revision_info())
2232
new_branch.set_parent(branch.get_parent())
2233
new_branch.set_bound_location(branch.get_bound_location())
2234
new_branch.set_push_location(branch.get_push_location())
2236
# New branch has no tags by default
2237
new_branch.tags._set_tag_dict({})
2239
# Copying done; now update target format
2240
new_branch._transport.put_bytes('format',
2241
format.get_format_string(),
2242
mode=new_branch.bzrdir._get_file_mode())
2244
# Clean up old files
2245
new_branch._transport.delete('revision-history')
2247
branch.set_parent(None)
2248
except errors.NoSuchFile:
2250
branch.set_bound_location(None)
added
removed
bzrlib/branch.py
