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# Copyright (C) 2005, 2006, 2007 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 cStringIO import StringIO
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from bzrlib.lazy_import import lazy_import
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lazy_import(globals(), """
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from warnings import warn
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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, TreeConfig
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from bzrlib.lockable_files import LockableFiles, TransportLock
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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.errors import (BzrError, BzrCheckError, DivergedBranches,
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HistoryMissing, InvalidRevisionId,
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InvalidRevisionNumber, LockError, NoSuchFile,
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NoSuchRevision, NotVersionedError,
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NotBranchError, UninitializableFormat,
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UnlistableStore, UnlistableBranch,
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from bzrlib.hooks import Hooks
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from bzrlib.symbol_versioning import (deprecated_function,
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zero_eight, zero_nine, zero_sixteen,
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from bzrlib.trace import mutter, mutter_callsite, note
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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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def break_lock(self):
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"""Break a lock if one is present from another instance.
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Uses the ui factory to ask for confirmation if the lock may be from
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This will probe the repository for its lock as well.
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self.control_files.break_lock()
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self.repository.break_lock()
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master = self.get_master_branch()
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if master is not None:
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def 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 = self.repository.get_revision_graph(last_revision)
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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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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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if last_revision is None:
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last_revision = _mod_revision.NULL_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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assert isinstance(revno, int)
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rh = self.revision_history()
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if not (1 <= revno <= len(rh)):
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raise InvalidRevisionNumber(revno)
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return self.repository.get_revision_delta(rh[revno-1])
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@deprecated_method(zero_sixteen)
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def get_root_id(self):
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"""Return the id of this branches root
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Deprecated: branches don't have root ids-- trees do.
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Use basis_tree().get_root_id() instead.
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raise NotImplementedError(self.get_root_id)
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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 None"""
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ph = self.revision_history()
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return _mod_revision.NULL_REVISION
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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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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 DivergedBranches(self, other)
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if stop_revision is None:
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stop_revision = other_len
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assert isinstance(stop_revision, int)
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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):
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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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raise NotImplementedError(self.update_revisions)
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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):
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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 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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for revision_id in self.revision_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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"""Create a checkout of a branch.
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:param to_location: The url to produce the checkout at
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:param revision_id: The revision to check out
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:param lightweight: If True, produce a lightweight checkout, otherwise,
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produce a bound branch (heavyweight checkout)
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:return: The tree of the created checkout
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t = transport.get_transport(to_location)
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format = self._get_checkout_format()
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checkout = format.initialize_on_transport(t)
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from_branch = BranchReferenceFormat().initialize(checkout, self)
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format = self._get_checkout_format()
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checkout_branch = bzrdir.BzrDir.create_branch_convenience(
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to_location, force_new_tree=False, format=format)
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checkout = checkout_branch.bzrdir
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checkout_branch.bind(self)
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# pull up to the specified revision_id to set the initial
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# branch tip correctly, and seed it with history.
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checkout_branch.pull(self, stop_revision=revision_id)
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tree = checkout.create_workingtree(revision_id,
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from_branch=from_branch)
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basis_tree = tree.basis_tree()
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basis_tree.lock_read()
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for path, file_id in basis_tree.iter_references():
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reference_parent = self.reference_parent(file_id, path)
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reference_parent.create_checkout(tree.abspath(path),
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basis_tree.get_reference_revision(file_id, path),
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def reference_parent(self, file_id, path):
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"""Return the parent branch for a tree-reference file_id
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:param file_id: The file_id of the tree reference
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:param path: The path of the file_id in the tree
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:return: A branch associated with the file_id
805
# FIXME should provide multiple branches, based on config
806
return Branch.open(self.bzrdir.root_transport.clone(path).base)
808
def supports_tags(self):
809
return self._format.supports_tags()
812
class BranchFormat(object):
813
"""An encapsulation of the initialization and open routines for a format.
815
Formats provide three things:
816
* An initialization routine,
820
Formats are placed in an dict by their format string for reference
821
during branch opening. Its not required that these be instances, they
822
can be classes themselves with class methods - it simply depends on
823
whether state is needed for a given format or not.
825
Once a format is deprecated, just deprecate the initialize and open
826
methods on the format class. Do not deprecate the object, as the
827
object will be created every time regardless.
830
_default_format = None
831
"""The default format used for new branches."""
834
"""The known formats."""
836
def __eq__(self, other):
837
return self.__class__ is other.__class__
839
def __ne__(self, other):
840
return not (self == other)
843
def find_format(klass, a_bzrdir):
844
"""Return the format for the branch object in a_bzrdir."""
846
transport = a_bzrdir.get_branch_transport(None)
847
format_string = transport.get("format").read()
848
return klass._formats[format_string]
850
raise NotBranchError(path=transport.base)
852
raise errors.UnknownFormatError(format=format_string)
855
def get_default_format(klass):
856
"""Return the current default format."""
857
return klass._default_format
859
def get_reference(self, a_bzrdir):
860
"""Get the target reference of the branch in a_bzrdir.
862
format probing must have been completed before calling
863
this method - it is assumed that the format of the branch
864
in a_bzrdir is correct.
866
:param a_bzrdir: The bzrdir to get the branch data from.
867
:return: None if the branch is not a reference branch.
872
def set_reference(self, a_bzrdir, to_branch):
873
"""Set the target reference of the branch in a_bzrdir.
875
format probing must have been completed before calling
876
this method - it is assumed that the format of the branch
877
in a_bzrdir is correct.
879
:param a_bzrdir: The bzrdir to set the branch reference for.
880
:param to_branch: branch that the checkout is to reference
882
raise NotImplementedError(self.set_reference)
884
def get_format_string(self):
885
"""Return the ASCII format string that identifies this format."""
886
raise NotImplementedError(self.get_format_string)
888
def get_format_description(self):
889
"""Return the short format description for this format."""
890
raise NotImplementedError(self.get_format_description)
892
def _initialize_helper(self, a_bzrdir, utf8_files, lock_type='metadir',
894
"""Initialize a branch in a bzrdir, with specified files
896
:param a_bzrdir: The bzrdir to initialize the branch in
897
:param utf8_files: The files to create as a list of
898
(filename, content) tuples
899
:param set_format: If True, set the format with
900
self.get_format_string. (BzrBranch4 has its format set
902
:return: a branch in this format
904
mutter('creating branch %r in %s', self, a_bzrdir.transport.base)
905
branch_transport = a_bzrdir.get_branch_transport(self)
907
'metadir': ('lock', lockdir.LockDir),
908
'branch4': ('branch-lock', lockable_files.TransportLock),
910
lock_name, lock_class = lock_map[lock_type]
911
control_files = lockable_files.LockableFiles(branch_transport,
912
lock_name, lock_class)
913
control_files.create_lock()
914
control_files.lock_write()
916
control_files.put_utf8('format', self.get_format_string())
918
for file, content in utf8_files:
919
control_files.put_utf8(file, content)
921
control_files.unlock()
922
return self.open(a_bzrdir, _found=True)
924
def initialize(self, a_bzrdir):
925
"""Create a branch of this format in a_bzrdir."""
926
raise NotImplementedError(self.initialize)
928
def is_supported(self):
929
"""Is this format supported?
931
Supported formats can be initialized and opened.
932
Unsupported formats may not support initialization or committing or
933
some other features depending on the reason for not being supported.
937
def open(self, a_bzrdir, _found=False):
938
"""Return the branch object for a_bzrdir
940
_found is a private parameter, do not use it. It is used to indicate
941
if format probing has already be done.
943
raise NotImplementedError(self.open)
946
def register_format(klass, format):
947
klass._formats[format.get_format_string()] = format
950
def set_default_format(klass, format):
951
klass._default_format = format
954
def unregister_format(klass, format):
955
assert klass._formats[format.get_format_string()] is format
956
del klass._formats[format.get_format_string()]
959
return self.get_format_string().rstrip()
961
def supports_tags(self):
962
"""True if this format supports tags stored in the branch"""
963
return False # by default
965
# XXX: Probably doesn't really belong here -- mbp 20070212
966
def _initialize_control_files(self, a_bzrdir, utf8_files, lock_filename,
968
branch_transport = a_bzrdir.get_branch_transport(self)
969
control_files = lockable_files.LockableFiles(branch_transport,
970
lock_filename, lock_class)
971
control_files.create_lock()
972
control_files.lock_write()
974
for filename, content in utf8_files:
975
control_files.put_utf8(filename, content)
977
control_files.unlock()
980
class BranchHooks(Hooks):
981
"""A dictionary mapping hook name to a list of callables for branch hooks.
983
e.g. ['set_rh'] Is the list of items to be called when the
984
set_revision_history function is invoked.
988
"""Create the default hooks.
990
These are all empty initially, because by default nothing should get
994
# Introduced in 0.15:
995
# invoked whenever the revision history has been set
996
# with set_revision_history. The api signature is
997
# (branch, revision_history), and the branch will
1000
# invoked after a push operation completes.
1001
# the api signature is
1003
# containing the members
1004
# (source, local, master, old_revno, old_revid, new_revno, new_revid)
1005
# where local is the local target branch or None, master is the target
1006
# master branch, and the rest should be self explanatory. The source
1007
# is read locked and the target branches write locked. Source will
1008
# be the local low-latency branch.
1009
self['post_push'] = []
1010
# invoked after a pull operation completes.
1011
# the api signature is
1013
# containing the members
1014
# (source, local, master, old_revno, old_revid, new_revno, new_revid)
1015
# where local is the local branch or None, master is the target
1016
# master branch, and the rest should be self explanatory. The source
1017
# is read locked and the target branches write locked. The local
1018
# branch is the low-latency branch.
1019
self['post_pull'] = []
1020
# invoked before a commit operation takes place.
1021
# the api signature is
1022
# (local, master, old_revno, old_revid, future_revno, future_revid,
1023
# tree_delta, future_tree).
1024
# old_revid is NULL_REVISION for the first commit to a branch
1025
# tree_delta is a TreeDelta object describing changes from the basis
1026
# revision, hooks MUST NOT modify this delta
1027
# future_tree is an in-memory tree obtained from
1028
# CommitBuilder.revision_tree() and hooks MUST NOT modify this tree
1029
self['pre_commit'] = []
1030
# invoked after a commit operation completes.
1031
# the api signature is
1032
# (local, master, old_revno, old_revid, new_revno, new_revid)
1033
# old_revid is NULL_REVISION for the first commit to a branch.
1034
self['post_commit'] = []
1035
# invoked after a uncommit operation completes.
1036
# the api signature is
1037
# (local, master, old_revno, old_revid, new_revno, new_revid) where
1038
# local is the local branch or None, master is the target branch,
1039
# and an empty branch recieves new_revno of 0, new_revid of None.
1040
self['post_uncommit'] = []
1043
# install the default hooks into the Branch class.
1044
Branch.hooks = BranchHooks()
1047
class BzrBranchFormat4(BranchFormat):
1048
"""Bzr branch format 4.
1051
- a revision-history file.
1052
- a branch-lock lock file [ to be shared with the bzrdir ]
1055
def get_format_description(self):
1056
"""See BranchFormat.get_format_description()."""
1057
return "Branch format 4"
1059
def initialize(self, a_bzrdir):
1060
"""Create a branch of this format in a_bzrdir."""
1061
utf8_files = [('revision-history', ''),
1062
('branch-name', ''),
1064
return self._initialize_helper(a_bzrdir, utf8_files,
1065
lock_type='branch4', set_format=False)
1068
super(BzrBranchFormat4, self).__init__()
1069
self._matchingbzrdir = bzrdir.BzrDirFormat6()
1071
def open(self, a_bzrdir, _found=False):
1072
"""Return the branch object for a_bzrdir
1074
_found is a private parameter, do not use it. It is used to indicate
1075
if format probing has already be done.
1078
# we are being called directly and must probe.
1079
raise NotImplementedError
1080
return BzrBranch(_format=self,
1081
_control_files=a_bzrdir._control_files,
1083
_repository=a_bzrdir.open_repository())
1086
return "Bazaar-NG branch format 4"
1089
class BzrBranchFormat5(BranchFormat):
1090
"""Bzr branch format 5.
1093
- a revision-history file.
1095
- a lock dir guarding the branch itself
1096
- all of this stored in a branch/ subdirectory
1097
- works with shared repositories.
1099
This format is new in bzr 0.8.
1102
def get_format_string(self):
1103
"""See BranchFormat.get_format_string()."""
1104
return "Bazaar-NG branch format 5\n"
1106
def get_format_description(self):
1107
"""See BranchFormat.get_format_description()."""
1108
return "Branch format 5"
1110
def initialize(self, a_bzrdir):
1111
"""Create a branch of this format in a_bzrdir."""
1112
utf8_files = [('revision-history', ''),
1113
('branch-name', ''),
1115
return self._initialize_helper(a_bzrdir, utf8_files)
1118
super(BzrBranchFormat5, self).__init__()
1119
self._matchingbzrdir = bzrdir.BzrDirMetaFormat1()
1121
def open(self, a_bzrdir, _found=False):
1122
"""Return the branch object for a_bzrdir
1124
_found is a private parameter, do not use it. It is used to indicate
1125
if format probing has already be done.
1128
format = BranchFormat.find_format(a_bzrdir)
1129
assert format.__class__ == self.__class__
1131
transport = a_bzrdir.get_branch_transport(None)
1132
control_files = lockable_files.LockableFiles(transport, 'lock',
1134
return BzrBranch5(_format=self,
1135
_control_files=control_files,
1137
_repository=a_bzrdir.find_repository())
1139
raise NotBranchError(path=transport.base)
1142
class BzrBranchFormat6(BzrBranchFormat5):
1143
"""Branch format with last-revision and tags.
1145
Unlike previous formats, this has no explicit revision history. Instead,
1146
this just stores the last-revision, and the left-hand history leading
1147
up to there is the history.
1149
This format was introduced in bzr 0.15
1150
and became the default in 0.91.
1153
def get_format_string(self):
1154
"""See BranchFormat.get_format_string()."""
1155
return "Bazaar Branch Format 6 (bzr 0.15)\n"
1157
def get_format_description(self):
1158
"""See BranchFormat.get_format_description()."""
1159
return "Branch format 6"
1161
def initialize(self, a_bzrdir):
1162
"""Create a branch of this format in a_bzrdir."""
1163
utf8_files = [('last-revision', '0 null:\n'),
1164
('branch.conf', ''),
1167
return self._initialize_helper(a_bzrdir, utf8_files)
1169
def open(self, a_bzrdir, _found=False):
1170
"""Return the branch object for a_bzrdir
1172
_found is a private parameter, do not use it. It is used to indicate
1173
if format probing has already be done.
1176
format = BranchFormat.find_format(a_bzrdir)
1177
assert format.__class__ == self.__class__
1178
transport = a_bzrdir.get_branch_transport(None)
1179
control_files = lockable_files.LockableFiles(transport, 'lock',
1181
return BzrBranch6(_format=self,
1182
_control_files=control_files,
1184
_repository=a_bzrdir.find_repository())
1186
def supports_tags(self):
1190
class BranchReferenceFormat(BranchFormat):
1191
"""Bzr branch reference format.
1193
Branch references are used in implementing checkouts, they
1194
act as an alias to the real branch which is at some other url.
1201
def get_format_string(self):
1202
"""See BranchFormat.get_format_string()."""
1203
return "Bazaar-NG Branch Reference Format 1\n"
1205
def get_format_description(self):
1206
"""See BranchFormat.get_format_description()."""
1207
return "Checkout reference format 1"
1209
def get_reference(self, a_bzrdir):
1210
"""See BranchFormat.get_reference()."""
1211
transport = a_bzrdir.get_branch_transport(None)
1212
return transport.get('location').read()
1214
def set_reference(self, a_bzrdir, to_branch):
1215
"""See BranchFormat.set_reference()."""
1216
transport = a_bzrdir.get_branch_transport(None)
1217
location = transport.put_bytes('location', to_branch.base)
1219
def initialize(self, a_bzrdir, target_branch=None):
1220
"""Create a branch of this format in a_bzrdir."""
1221
if target_branch is None:
1222
# this format does not implement branch itself, thus the implicit
1223
# creation contract must see it as uninitializable
1224
raise errors.UninitializableFormat(self)
1225
mutter('creating branch reference in %s', a_bzrdir.transport.base)
1226
branch_transport = a_bzrdir.get_branch_transport(self)
1227
branch_transport.put_bytes('location',
1228
target_branch.bzrdir.root_transport.base)
1229
branch_transport.put_bytes('format', self.get_format_string())
1231
a_bzrdir, _found=True,
1232
possible_transports=[target_branch.bzrdir.root_transport])
1235
super(BranchReferenceFormat, self).__init__()
1236
self._matchingbzrdir = bzrdir.BzrDirMetaFormat1()
1238
def _make_reference_clone_function(format, a_branch):
1239
"""Create a clone() routine for a branch dynamically."""
1240
def clone(to_bzrdir, revision_id=None):
1241
"""See Branch.clone()."""
1242
return format.initialize(to_bzrdir, a_branch)
1243
# cannot obey revision_id limits when cloning a reference ...
1244
# FIXME RBC 20060210 either nuke revision_id for clone, or
1245
# emit some sort of warning/error to the caller ?!
1248
def open(self, a_bzrdir, _found=False, location=None,
1249
possible_transports=None):
1250
"""Return the branch that the branch reference in a_bzrdir points at.
1252
_found is a private parameter, do not use it. It is used to indicate
1253
if format probing has already be done.
1256
format = BranchFormat.find_format(a_bzrdir)
1257
assert format.__class__ == self.__class__
1258
if location is None:
1259
location = self.get_reference(a_bzrdir)
1260
real_bzrdir = bzrdir.BzrDir.open(
1261
location, possible_transports=possible_transports)
1262
result = real_bzrdir.open_branch()
1263
# this changes the behaviour of result.clone to create a new reference
1264
# rather than a copy of the content of the branch.
1265
# I did not use a proxy object because that needs much more extensive
1266
# testing, and we are only changing one behaviour at the moment.
1267
# If we decide to alter more behaviours - i.e. the implicit nickname
1268
# then this should be refactored to introduce a tested proxy branch
1269
# and a subclass of that for use in overriding clone() and ....
1271
result.clone = self._make_reference_clone_function(result)
1275
# formats which have no format string are not discoverable
1276
# and not independently creatable, so are not registered.
1277
__format5 = BzrBranchFormat5()
1278
__format6 = BzrBranchFormat6()
1279
BranchFormat.register_format(__format5)
1280
BranchFormat.register_format(BranchReferenceFormat())
1281
BranchFormat.register_format(__format6)
1282
BranchFormat.set_default_format(__format6)
1283
_legacy_formats = [BzrBranchFormat4(),
1286
class BzrBranch(Branch):
1287
"""A branch stored in the actual filesystem.
1289
Note that it's "local" in the context of the filesystem; it doesn't
1290
really matter if it's on an nfs/smb/afs/coda/... share, as long as
1291
it's writable, and can be accessed via the normal filesystem API.
1294
def __init__(self, _format=None,
1295
_control_files=None, a_bzrdir=None, _repository=None):
1296
"""Create new branch object at a particular location."""
1297
Branch.__init__(self)
1298
if a_bzrdir is None:
1299
raise ValueError('a_bzrdir must be supplied')
1301
self.bzrdir = a_bzrdir
1302
# self._transport used to point to the directory containing the
1303
# control directory, but was not used - now it's just the transport
1304
# for the branch control files. mbp 20070212
1305
self._base = self.bzrdir.transport.clone('..').base
1306
self._format = _format
1307
if _control_files is None:
1308
raise ValueError('BzrBranch _control_files is None')
1309
self.control_files = _control_files
1310
self._transport = _control_files._transport
1311
self.repository = _repository
1314
return '%s(%r)' % (self.__class__.__name__, self.base)
1318
def _get_base(self):
1319
"""Returns the directory containing the control directory."""
1322
base = property(_get_base, doc="The URL for the root of this branch.")
1324
def abspath(self, name):
1325
"""See Branch.abspath."""
1326
return self.control_files._transport.abspath(name)
1329
@deprecated_method(zero_sixteen)
1331
def get_root_id(self):
1332
"""See Branch.get_root_id."""
1333
tree = self.repository.revision_tree(self.last_revision())
1334
return tree.get_root_id()
1336
def is_locked(self):
1337
return self.control_files.is_locked()
1339
def lock_write(self, token=None):
1340
repo_token = self.repository.lock_write()
1342
token = self.control_files.lock_write(token=token)
1344
self.repository.unlock()
1348
def lock_read(self):
1349
self.repository.lock_read()
1351
self.control_files.lock_read()
1353
self.repository.unlock()
1357
# TODO: test for failed two phase locks. This is known broken.
1359
self.control_files.unlock()
1361
self.repository.unlock()
1362
if not self.control_files.is_locked():
1363
# we just released the lock
1364
self._clear_cached_state()
1366
def peek_lock_mode(self):
1367
if self.control_files._lock_count == 0:
1370
return self.control_files._lock_mode
1372
def get_physical_lock_status(self):
1373
return self.control_files.get_physical_lock_status()
1376
def print_file(self, file, revision_id):
1377
"""See Branch.print_file."""
1378
return self.repository.print_file(file, revision_id)
1380
def _write_revision_history(self, history):
1381
"""Factored out of set_revision_history.
1383
This performs the actual writing to disk.
1384
It is intended to be called by BzrBranch5.set_revision_history."""
1385
self.control_files.put_bytes(
1386
'revision-history', '\n'.join(history))
1389
def set_revision_history(self, rev_history):
1390
"""See Branch.set_revision_history."""
1391
if 'evil' in debug.debug_flags:
1392
mutter_callsite(3, "set_revision_history scales with history.")
1393
self._clear_cached_state()
1394
self._write_revision_history(rev_history)
1395
self._cache_revision_history(rev_history)
1396
for hook in Branch.hooks['set_rh']:
1397
hook(self, rev_history)
1400
def set_last_revision_info(self, revno, revision_id):
1401
"""Set the last revision of this branch.
1403
The caller is responsible for checking that the revno is correct
1404
for this revision id.
1406
It may be possible to set the branch last revision to an id not
1407
present in the repository. However, branches can also be
1408
configured to check constraints on history, in which case this may not
1411
history = self._lefthand_history(revision_id)
1412
assert len(history) == revno, '%d != %d' % (len(history), revno)
1413
self.set_revision_history(history)
1415
def _gen_revision_history(self):
1416
history = self.control_files.get('revision-history').read().split('\n')
1417
if history[-1:] == ['']:
1418
# There shouldn't be a trailing newline, but just in case.
1422
def _lefthand_history(self, revision_id, last_rev=None,
1424
if 'evil' in debug.debug_flags:
1425
mutter_callsite(4, "_lefthand_history scales with history.")
1426
# stop_revision must be a descendant of last_revision
1427
stop_graph = self.repository.get_revision_graph(revision_id)
1428
if (last_rev is not None and last_rev != _mod_revision.NULL_REVISION
1429
and last_rev not in stop_graph):
1430
# our previous tip is not merged into stop_revision
1431
raise errors.DivergedBranches(self, other_branch)
1432
# make a new revision history from the graph
1433
current_rev_id = revision_id
1435
while current_rev_id not in (None, _mod_revision.NULL_REVISION):
1436
new_history.append(current_rev_id)
1437
current_rev_id_parents = stop_graph[current_rev_id]
1439
current_rev_id = current_rev_id_parents[0]
1441
current_rev_id = None
1442
new_history.reverse()
1446
def generate_revision_history(self, revision_id, last_rev=None,
1448
"""Create a new revision history that will finish with revision_id.
1450
:param revision_id: the new tip to use.
1451
:param last_rev: The previous last_revision. If not None, then this
1452
must be a ancestory of revision_id, or DivergedBranches is raised.
1453
:param other_branch: The other branch that DivergedBranches should
1454
raise with respect to.
1456
self.set_revision_history(self._lefthand_history(revision_id,
1457
last_rev, other_branch))
1460
def update_revisions(self, other, stop_revision=None, overwrite=False):
1461
"""See Branch.update_revisions."""
1464
other_last_revno, other_last_revision = other.last_revision_info()
1465
if stop_revision is None:
1466
stop_revision = other_last_revision
1467
if _mod_revision.is_null(stop_revision):
1468
# if there are no commits, we're done.
1470
# whats the current last revision, before we fetch [and change it
1472
last_rev = _mod_revision.ensure_null(self.last_revision())
1473
# we fetch here so that we don't process data twice in the common
1474
# case of having something to pull, and so that the check for
1475
# already merged can operate on the just fetched graph, which will
1476
# be cached in memory.
1477
self.fetch(other, stop_revision)
1478
# Check to see if one is an ancestor of the other
1480
heads = self.repository.get_graph().heads([stop_revision,
1482
if heads == set([last_rev]):
1483
# The current revision is a decendent of the target,
1486
elif heads == set([stop_revision, last_rev]):
1487
# These branches have diverged
1488
raise errors.DivergedBranches(self, other)
1489
assert heads == set([stop_revision])
1490
if other_last_revision == stop_revision:
1491
self.set_last_revision_info(other_last_revno,
1492
other_last_revision)
1494
# TODO: jam 2007-11-29 Is there a way to determine the
1495
# revno without searching all of history??
1497
self.generate_revision_history(stop_revision)
1499
self.generate_revision_history(stop_revision,
1500
last_rev=last_rev, other_branch=other)
1504
def basis_tree(self):
1505
"""See Branch.basis_tree."""
1506
return self.repository.revision_tree(self.last_revision())
1509
def pull(self, source, overwrite=False, stop_revision=None,
1510
_hook_master=None, run_hooks=True, possible_transports=None):
1513
:param _hook_master: Private parameter - set the branch to
1514
be supplied as the master to push hooks.
1515
:param run_hooks: Private parameter - if false, this branch
1516
is being called because it's the master of the primary branch,
1517
so it should not run its hooks.
1519
result = PullResult()
1520
result.source_branch = source
1521
result.target_branch = self
1524
result.old_revno, result.old_revid = self.last_revision_info()
1525
self.update_revisions(source, stop_revision, overwrite=overwrite)
1526
result.tag_conflicts = source.tags.merge_to(self.tags, overwrite)
1527
result.new_revno, result.new_revid = self.last_revision_info()
1529
result.master_branch = _hook_master
1530
result.local_branch = self
1532
result.master_branch = self
1533
result.local_branch = None
1535
for hook in Branch.hooks['post_pull']:
1541
def _get_parent_location(self):
1542
_locs = ['parent', 'pull', 'x-pull']
1545
return self.control_files.get(l).read().strip('\n')
1551
def push(self, target, overwrite=False, stop_revision=None,
1552
_override_hook_source_branch=None):
1555
This is the basic concrete implementation of push()
1557
:param _override_hook_source_branch: If specified, run
1558
the hooks passing this Branch as the source, rather than self.
1559
This is for use of RemoteBranch, where push is delegated to the
1560
underlying vfs-based Branch.
1562
# TODO: Public option to disable running hooks - should be trivial but
1566
result = self._push_with_bound_branches(target, overwrite,
1568
_override_hook_source_branch=_override_hook_source_branch)
1573
def _push_with_bound_branches(self, target, overwrite,
1575
_override_hook_source_branch=None):
1576
"""Push from self into target, and into target's master if any.
1578
This is on the base BzrBranch class even though it doesn't support
1579
bound branches because the *target* might be bound.
1582
if _override_hook_source_branch:
1583
result.source_branch = _override_hook_source_branch
1584
for hook in Branch.hooks['post_push']:
1587
bound_location = target.get_bound_location()
1588
if bound_location and target.base != bound_location:
1589
# there is a master branch.
1591
# XXX: Why the second check? Is it even supported for a branch to
1592
# be bound to itself? -- mbp 20070507
1593
master_branch = target.get_master_branch()
1594
master_branch.lock_write()
1596
# push into the master from this branch.
1597
self._basic_push(master_branch, overwrite, stop_revision)
1598
# and push into the target branch from this. Note that we push from
1599
# this branch again, because its considered the highest bandwidth
1601
result = self._basic_push(target, overwrite, stop_revision)
1602
result.master_branch = master_branch
1603
result.local_branch = target
1607
master_branch.unlock()
1610
result = self._basic_push(target, overwrite, stop_revision)
1611
# TODO: Why set master_branch and local_branch if there's no
1612
# binding? Maybe cleaner to just leave them unset? -- mbp
1614
result.master_branch = target
1615
result.local_branch = None
1619
def _basic_push(self, target, overwrite, stop_revision):
1620
"""Basic implementation of push without bound branches or hooks.
1622
Must be called with self read locked and target write locked.
1624
result = PushResult()
1625
result.source_branch = self
1626
result.target_branch = target
1627
result.old_revno, result.old_revid = target.last_revision_info()
1629
target.update_revisions(self, stop_revision)
1630
except DivergedBranches:
1634
target.set_revision_history(self.revision_history())
1635
result.tag_conflicts = self.tags.merge_to(target.tags, overwrite)
1636
result.new_revno, result.new_revid = target.last_revision_info()
1639
def get_parent(self):
1640
"""See Branch.get_parent."""
1642
assert self.base[-1] == '/'
1643
parent = self._get_parent_location()
1646
# This is an old-format absolute path to a local branch
1647
# turn it into a url
1648
if parent.startswith('/'):
1649
parent = urlutils.local_path_to_url(parent.decode('utf8'))
1651
return urlutils.join(self.base[:-1], parent)
1652
except errors.InvalidURLJoin, e:
1653
raise errors.InaccessibleParent(parent, self.base)
1655
def set_push_location(self, location):
1656
"""See Branch.set_push_location."""
1657
self.get_config().set_user_option(
1658
'push_location', location,
1659
store=_mod_config.STORE_LOCATION_NORECURSE)
1662
def set_parent(self, url):
1663
"""See Branch.set_parent."""
1664
# TODO: Maybe delete old location files?
1665
# URLs should never be unicode, even on the local fs,
1666
# FIXUP this and get_parent in a future branch format bump:
1667
# read and rewrite the file, and have the new format code read
1668
# using .get not .get_utf8. RBC 20060125
1670
if isinstance(url, unicode):
1672
url = url.encode('ascii')
1673
except UnicodeEncodeError:
1674
raise errors.InvalidURL(url,
1675
"Urls must be 7-bit ascii, "
1676
"use bzrlib.urlutils.escape")
1677
url = urlutils.relative_url(self.base, url)
1678
self._set_parent_location(url)
1680
def _set_parent_location(self, url):
1682
self.control_files._transport.delete('parent')
1684
assert isinstance(url, str)
1685
self.control_files.put_bytes('parent', url + '\n')
1688
class BzrBranch5(BzrBranch):
1689
"""A format 5 branch. This supports new features over plain branches.
1691
It has support for a master_branch which is the data for bound branches.
1699
super(BzrBranch5, self).__init__(_format=_format,
1700
_control_files=_control_files,
1702
_repository=_repository)
1705
def pull(self, source, overwrite=False, stop_revision=None,
1706
run_hooks=True, possible_transports=None):
1707
"""Pull from source into self, updating my master if any.
1709
:param run_hooks: Private parameter - if false, this branch
1710
is being called because it's the master of the primary branch,
1711
so it should not run its hooks.
1713
bound_location = self.get_bound_location()
1714
master_branch = None
1715
if bound_location and source.base != bound_location:
1716
# not pulling from master, so we need to update master.
1717
master_branch = self.get_master_branch(possible_transports)
1718
master_branch.lock_write()
1721
# pull from source into master.
1722
master_branch.pull(source, overwrite, stop_revision,
1724
return super(BzrBranch5, self).pull(source, overwrite,
1725
stop_revision, _hook_master=master_branch,
1726
run_hooks=run_hooks)
1729
master_branch.unlock()
1731
def get_bound_location(self):
1733
return self.control_files.get_utf8('bound').read()[:-1]
1734
except errors.NoSuchFile:
1738
def get_master_branch(self, possible_transports=None):
1739
"""Return the branch we are bound to.
1741
:return: Either a Branch, or None
1743
This could memoise the branch, but if thats done
1744
it must be revalidated on each new lock.
1745
So for now we just don't memoise it.
1746
# RBC 20060304 review this decision.
1748
bound_loc = self.get_bound_location()
1752
return Branch.open(bound_loc,
1753
possible_transports=possible_transports)
1754
except (errors.NotBranchError, errors.ConnectionError), e:
1755
raise errors.BoundBranchConnectionFailure(
1759
def set_bound_location(self, location):
1760
"""Set the target where this branch is bound to.
1762
:param location: URL to the target branch
1765
self.control_files.put_utf8('bound', location+'\n')
1768
self.control_files._transport.delete('bound')
1774
def bind(self, other):
1775
"""Bind this branch to the branch other.
1777
This does not push or pull data between the branches, though it does
1778
check for divergence to raise an error when the branches are not
1779
either the same, or one a prefix of the other. That behaviour may not
1780
be useful, so that check may be removed in future.
1782
:param other: The branch to bind to
1785
# TODO: jam 20051230 Consider checking if the target is bound
1786
# It is debatable whether you should be able to bind to
1787
# a branch which is itself bound.
1788
# Committing is obviously forbidden,
1789
# but binding itself may not be.
1790
# Since we *have* to check at commit time, we don't
1791
# *need* to check here
1793
# we want to raise diverged if:
1794
# last_rev is not in the other_last_rev history, AND
1795
# other_last_rev is not in our history, and do it without pulling
1797
last_rev = _mod_revision.ensure_null(self.last_revision())
1798
if last_rev != _mod_revision.NULL_REVISION:
1801
other_last_rev = other.last_revision()
1802
if not _mod_revision.is_null(other_last_rev):
1803
# neither branch is new, we have to do some work to
1804
# ascertain diversion.
1805
remote_graph = other.repository.get_revision_graph(
1807
local_graph = self.repository.get_revision_graph(last_rev)
1808
if (last_rev not in remote_graph and
1809
other_last_rev not in local_graph):
1810
raise errors.DivergedBranches(self, other)
1813
self.set_bound_location(other.base)
1817
"""If bound, unbind"""
1818
return self.set_bound_location(None)
1821
def update(self, possible_transports=None):
1822
"""Synchronise this branch with the master branch if any.
1824
:return: None or the last_revision that was pivoted out during the
1827
master = self.get_master_branch(possible_transports)
1828
if master is not None:
1829
old_tip = _mod_revision.ensure_null(self.last_revision())
1830
self.pull(master, overwrite=True)
1831
if self.repository.get_graph().is_ancestor(old_tip,
1832
_mod_revision.ensure_null(self.last_revision())):
1838
class BzrBranchExperimental(BzrBranch5):
1839
"""Bzr experimental branch format
1842
- a revision-history file.
1844
- a lock dir guarding the branch itself
1845
- all of this stored in a branch/ subdirectory
1846
- works with shared repositories.
1847
- a tag dictionary in the branch
1849
This format is new in bzr 0.15, but shouldn't be used for real data,
1852
This class acts as it's own BranchFormat.
1855
_matchingbzrdir = bzrdir.BzrDirMetaFormat1()
1858
def get_format_string(cls):
1859
"""See BranchFormat.get_format_string()."""
1860
return "Bazaar-NG branch format experimental\n"
1863
def get_format_description(cls):
1864
"""See BranchFormat.get_format_description()."""
1865
return "Experimental branch format"
1868
def get_reference(cls, a_bzrdir):
1869
"""Get the target reference of the branch in a_bzrdir.
1871
format probing must have been completed before calling
1872
this method - it is assumed that the format of the branch
1873
in a_bzrdir is correct.
1875
:param a_bzrdir: The bzrdir to get the branch data from.
1876
:return: None if the branch is not a reference branch.
1881
def set_reference(self, a_bzrdir, to_branch):
1882
"""Set the target reference of the branch in a_bzrdir.
1884
format probing must have been completed before calling
1885
this method - it is assumed that the format of the branch
1886
in a_bzrdir is correct.
1888
:param a_bzrdir: The bzrdir to set the branch reference for.
1889
:param to_branch: branch that the checkout is to reference
1891
raise NotImplementedError(self.set_reference)
1894
def _initialize_control_files(cls, a_bzrdir, utf8_files, lock_filename,
1896
branch_transport = a_bzrdir.get_branch_transport(cls)
1897
control_files = lockable_files.LockableFiles(branch_transport,
1898
lock_filename, lock_class)
1899
control_files.create_lock()
1900
control_files.lock_write()
1902
for filename, content in utf8_files:
1903
control_files.put_utf8(filename, content)
1905
control_files.unlock()
1908
def initialize(cls, a_bzrdir):
1909
"""Create a branch of this format in a_bzrdir."""
1910
utf8_files = [('format', cls.get_format_string()),
1911
('revision-history', ''),
1912
('branch-name', ''),
1915
cls._initialize_control_files(a_bzrdir, utf8_files,
1916
'lock', lockdir.LockDir)
1917
return cls.open(a_bzrdir, _found=True)
1920
def open(cls, a_bzrdir, _found=False):
1921
"""Return the branch object for a_bzrdir
1923
_found is a private parameter, do not use it. It is used to indicate
1924
if format probing has already be done.
1927
format = BranchFormat.find_format(a_bzrdir)
1928
assert format.__class__ == cls
1929
transport = a_bzrdir.get_branch_transport(None)
1930
control_files = lockable_files.LockableFiles(transport, 'lock',
1932
return cls(_format=cls,
1933
_control_files=control_files,
1935
_repository=a_bzrdir.find_repository())
1938
def is_supported(cls):
1941
def _make_tags(self):
1942
return BasicTags(self)
1945
def supports_tags(cls):
1949
BranchFormat.register_format(BzrBranchExperimental)
1952
class BzrBranch6(BzrBranch5):
1955
def last_revision_info(self):
1956
revision_string = self.control_files.get('last-revision').read()
1957
revno, revision_id = revision_string.rstrip('\n').split(' ', 1)
1958
revision_id = cache_utf8.get_cached_utf8(revision_id)
1960
return revno, revision_id
1962
def last_revision(self):
1963
"""Return last revision id, or None"""
1964
revision_id = self.last_revision_info()[1]
1967
def _write_last_revision_info(self, revno, revision_id):
1968
"""Simply write out the revision id, with no checks.
1970
Use set_last_revision_info to perform this safely.
1972
Does not update the revision_history cache.
1973
Intended to be called by set_last_revision_info and
1974
_write_revision_history.
1976
if revision_id is None:
1977
revision_id = 'null:'
1978
out_string = '%d %s\n' % (revno, revision_id)
1979
self.control_files.put_bytes('last-revision', out_string)
1982
def set_last_revision_info(self, revno, revision_id):
1983
if self._get_append_revisions_only():
1984
self._check_history_violation(revision_id)
1985
self._write_last_revision_info(revno, revision_id)
1986
self._clear_cached_state()
1988
def _check_history_violation(self, revision_id):
1989
last_revision = _mod_revision.ensure_null(self.last_revision())
1990
if _mod_revision.is_null(last_revision):
1992
if last_revision not in self._lefthand_history(revision_id):
1993
raise errors.AppendRevisionsOnlyViolation(self.base)
1995
def _gen_revision_history(self):
1996
"""Generate the revision history from last revision
1998
history = list(self.repository.iter_reverse_revision_history(
1999
self.last_revision()))
2003
def _write_revision_history(self, history):
2004
"""Factored out of set_revision_history.
2006
This performs the actual writing to disk, with format-specific checks.
2007
It is intended to be called by BzrBranch5.set_revision_history.
2009
if len(history) == 0:
2010
last_revision = 'null:'
2012
if history != self._lefthand_history(history[-1]):
2013
raise errors.NotLefthandHistory(history)
2014
last_revision = history[-1]
2015
if self._get_append_revisions_only():
2016
self._check_history_violation(last_revision)
2017
self._write_last_revision_info(len(history), last_revision)
2020
def _set_parent_location(self, url):
2021
"""Set the parent branch"""
2022
self._set_config_location('parent_location', url, make_relative=True)
2025
def _get_parent_location(self):
2026
"""Set the parent branch"""
2027
return self._get_config_location('parent_location')
2029
def set_push_location(self, location):
2030
"""See Branch.set_push_location."""
2031
self._set_config_location('push_location', location)
2033
def set_bound_location(self, location):
2034
"""See Branch.set_push_location."""
2036
config = self.get_config()
2037
if location is None:
2038
if config.get_user_option('bound') != 'True':
2041
config.set_user_option('bound', 'False', warn_masked=True)
2044
self._set_config_location('bound_location', location,
2046
config.set_user_option('bound', 'True', warn_masked=True)
2049
def _get_bound_location(self, bound):
2050
"""Return the bound location in the config file.
2052
Return None if the bound parameter does not match"""
2053
config = self.get_config()
2054
config_bound = (config.get_user_option('bound') == 'True')
2055
if config_bound != bound:
2057
return self._get_config_location('bound_location', config=config)
2059
def get_bound_location(self):
2060
"""See Branch.set_push_location."""
2061
return self._get_bound_location(True)
2063
def get_old_bound_location(self):
2064
"""See Branch.get_old_bound_location"""
2065
return self._get_bound_location(False)
2067
def set_append_revisions_only(self, enabled):
2072
self.get_config().set_user_option('append_revisions_only', value,
2075
def _get_append_revisions_only(self):
2076
value = self.get_config().get_user_option('append_revisions_only')
2077
return value == 'True'
2079
def _synchronize_history(self, destination, revision_id):
2080
"""Synchronize last revision and revision history between branches.
2082
This version is most efficient when the destination is also a
2083
BzrBranch6, but works for BzrBranch5, as long as the destination's
2084
repository contains all the lefthand ancestors of the intended
2085
last_revision. If not, set_last_revision_info will fail.
2087
:param destination: The branch to copy the history into
2088
:param revision_id: The revision-id to truncate history at. May
2089
be None to copy complete history.
2091
source_revno, source_revision_id = self.last_revision_info()
2092
if revision_id is None:
2093
revno, revision_id = source_revno, source_revision_id
2094
elif source_revision_id == revision_id:
2095
# we know the revno without needing to walk all of history
2096
revno = source_revno
2098
# To figure out the revno for a random revision, we need to build
2099
# the revision history, and count its length.
2100
# We don't care about the order, just how long it is.
2101
# Alternatively, we could start at the current location, and count
2102
# backwards. But there is no guarantee that we will find it since
2103
# it may be a merged revision.
2104
revno = len(list(self.repository.iter_reverse_revision_history(
2106
destination.set_last_revision_info(revno, revision_id)
2108
def _make_tags(self):
2109
return BasicTags(self)
2112
######################################################################
2113
# results of operations
2116
class _Result(object):
2118
def _show_tag_conficts(self, to_file):
2119
if not getattr(self, 'tag_conflicts', None):
2121
to_file.write('Conflicting tags:\n')
2122
for name, value1, value2 in self.tag_conflicts:
2123
to_file.write(' %s\n' % (name, ))
2126
class PullResult(_Result):
2127
"""Result of a Branch.pull operation.
2129
:ivar old_revno: Revision number before pull.
2130
:ivar new_revno: Revision number after pull.
2131
:ivar old_revid: Tip revision id before pull.
2132
:ivar new_revid: Tip revision id after pull.
2133
:ivar source_branch: Source (local) branch object.
2134
:ivar master_branch: Master branch of the target, or None.
2135
:ivar target_branch: Target/destination branch object.
2139
# DEPRECATED: pull used to return the change in revno
2140
return self.new_revno - self.old_revno
2142
def report(self, to_file):
2143
if self.old_revid == self.new_revid:
2144
to_file.write('No revisions to pull.\n')
2146
to_file.write('Now on revision %d.\n' % self.new_revno)
2147
self._show_tag_conficts(to_file)
2150
class PushResult(_Result):
2151
"""Result of a Branch.push operation.
2153
:ivar old_revno: Revision number before push.
2154
:ivar new_revno: Revision number after push.
2155
:ivar old_revid: Tip revision id before push.
2156
:ivar new_revid: Tip revision id after push.
2157
:ivar source_branch: Source branch object.
2158
:ivar master_branch: Master branch of the target, or None.
2159
:ivar target_branch: Target/destination branch object.
2163
# DEPRECATED: push used to return the change in revno
2164
return self.new_revno - self.old_revno
2166
def report(self, to_file):
2167
"""Write a human-readable description of the result."""
2168
if self.old_revid == self.new_revid:
2169
to_file.write('No new revisions to push.\n')
2171
to_file.write('Pushed up to revision %d.\n' % self.new_revno)
2172
self._show_tag_conficts(to_file)
2175
class BranchCheckResult(object):
2176
"""Results of checking branch consistency.
2181
def __init__(self, branch):
2182
self.branch = branch
2184
def report_results(self, verbose):
2185
"""Report the check results via trace.note.
2187
:param verbose: Requests more detailed display of what was checked,
2190
note('checked branch %s format %s',
2192
self.branch._format)
2195
class Converter5to6(object):
2196
"""Perform an in-place upgrade of format 5 to format 6"""
2198
def convert(self, branch):
2199
# Data for 5 and 6 can peacefully coexist.
2200
format = BzrBranchFormat6()
2201
new_branch = format.open(branch.bzrdir, _found=True)
2203
# Copy source data into target
2204
new_branch.set_last_revision_info(*branch.last_revision_info())
2205
new_branch.set_parent(branch.get_parent())
2206
new_branch.set_bound_location(branch.get_bound_location())
2207
new_branch.set_push_location(branch.get_push_location())
2209
# New branch has no tags by default
2210
new_branch.tags._set_tag_dict({})
2212
# Copying done; now update target format
2213
new_branch.control_files.put_utf8('format',
2214
format.get_format_string())
2216
# Clean up old files
2217
new_branch.control_files._transport.delete('revision-history')
2219
branch.set_parent(None)
2222
branch.set_bound_location(None)
added
removed
bzrlib/branch.py
