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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, 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):
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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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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):
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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 hashes on to 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 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 len(self.revision_history())
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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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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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revision_id = osutils.safe_revision_id(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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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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"""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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revision_id = osutils.safe_revision_id(revision_id)
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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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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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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
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# FIXME should provide multiple branches, based on config
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return Branch.open(self.bzrdir.root_transport.clone(path).base)
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def supports_tags(self):
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return self._format.supports_tags()
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class BranchFormat(object):
808
"""An encapsulation of the initialization and open routines for a format.
810
Formats provide three things:
811
* An initialization routine,
815
Formats are placed in an dict by their format string for reference
816
during branch opening. Its not required that these be instances, they
817
can be classes themselves with class methods - it simply depends on
818
whether state is needed for a given format or not.
820
Once a format is deprecated, just deprecate the initialize and open
821
methods on the format class. Do not deprecate the object, as the
822
object will be created every time regardless.
825
_default_format = None
826
"""The default format used for new branches."""
829
"""The known formats."""
831
def __eq__(self, other):
832
return self.__class__ is other.__class__
834
def __ne__(self, other):
835
return not (self == other)
838
def find_format(klass, a_bzrdir):
839
"""Return the format for the branch object in a_bzrdir."""
841
transport = a_bzrdir.get_branch_transport(None)
842
format_string = transport.get("format").read()
843
return klass._formats[format_string]
845
raise NotBranchError(path=transport.base)
847
raise errors.UnknownFormatError(format=format_string)
850
def get_default_format(klass):
851
"""Return the current default format."""
852
return klass._default_format
854
def get_reference(self, a_bzrdir):
855
"""Get the target reference of the branch in a_bzrdir.
857
format probing must have been completed before calling
858
this method - it is assumed that the format of the branch
859
in a_bzrdir is correct.
861
:param a_bzrdir: The bzrdir to get the branch data from.
862
:return: None if the branch is not a reference branch.
866
def get_format_string(self):
867
"""Return the ASCII format string that identifies this format."""
868
raise NotImplementedError(self.get_format_string)
870
def get_format_description(self):
871
"""Return the short format description for this format."""
872
raise NotImplementedError(self.get_format_description)
874
def _initialize_helper(self, a_bzrdir, utf8_files, lock_type='metadir',
876
"""Initialize a branch in a bzrdir, with specified files
878
:param a_bzrdir: The bzrdir to initialize the branch in
879
:param utf8_files: The files to create as a list of
880
(filename, content) tuples
881
:param set_format: If True, set the format with
882
self.get_format_string. (BzrBranch4 has its format set
884
:return: a branch in this format
886
mutter('creating branch %r in %s', self, a_bzrdir.transport.base)
887
branch_transport = a_bzrdir.get_branch_transport(self)
889
'metadir': ('lock', lockdir.LockDir),
890
'branch4': ('branch-lock', lockable_files.TransportLock),
892
lock_name, lock_class = lock_map[lock_type]
893
control_files = lockable_files.LockableFiles(branch_transport,
894
lock_name, lock_class)
895
control_files.create_lock()
896
control_files.lock_write()
898
control_files.put_utf8('format', self.get_format_string())
900
for file, content in utf8_files:
901
control_files.put_utf8(file, content)
903
control_files.unlock()
904
return self.open(a_bzrdir, _found=True)
906
def initialize(self, a_bzrdir):
907
"""Create a branch of this format in a_bzrdir."""
908
raise NotImplementedError(self.initialize)
910
def is_supported(self):
911
"""Is this format supported?
913
Supported formats can be initialized and opened.
914
Unsupported formats may not support initialization or committing or
915
some other features depending on the reason for not being supported.
919
def open(self, a_bzrdir, _found=False):
920
"""Return the branch object for a_bzrdir
922
_found is a private parameter, do not use it. It is used to indicate
923
if format probing has already be done.
925
raise NotImplementedError(self.open)
928
def register_format(klass, format):
929
klass._formats[format.get_format_string()] = format
932
def set_default_format(klass, format):
933
klass._default_format = format
936
def unregister_format(klass, format):
937
assert klass._formats[format.get_format_string()] is format
938
del klass._formats[format.get_format_string()]
941
return self.get_format_string().rstrip()
943
def supports_tags(self):
944
"""True if this format supports tags stored in the branch"""
945
return False # by default
947
# XXX: Probably doesn't really belong here -- mbp 20070212
948
def _initialize_control_files(self, a_bzrdir, utf8_files, lock_filename,
950
branch_transport = a_bzrdir.get_branch_transport(self)
951
control_files = lockable_files.LockableFiles(branch_transport,
952
lock_filename, lock_class)
953
control_files.create_lock()
954
control_files.lock_write()
956
for filename, content in utf8_files:
957
control_files.put_utf8(filename, content)
959
control_files.unlock()
962
class BranchHooks(Hooks):
963
"""A dictionary mapping hook name to a list of callables for branch hooks.
965
e.g. ['set_rh'] Is the list of items to be called when the
966
set_revision_history function is invoked.
970
"""Create the default hooks.
972
These are all empty initially, because by default nothing should get
976
# Introduced in 0.15:
977
# invoked whenever the revision history has been set
978
# with set_revision_history. The api signature is
979
# (branch, revision_history), and the branch will
982
# invoked after a push operation completes.
983
# the api signature is
985
# containing the members
986
# (source, local, master, old_revno, old_revid, new_revno, new_revid)
987
# where local is the local target branch or None, master is the target
988
# master branch, and the rest should be self explanatory. The source
989
# is read locked and the target branches write locked. Source will
990
# be the local low-latency branch.
991
self['post_push'] = []
992
# invoked after a pull operation completes.
993
# the api signature is
995
# containing the members
996
# (source, local, master, old_revno, old_revid, new_revno, new_revid)
997
# where local is the local branch or None, master is the target
998
# master branch, and the rest should be self explanatory. The source
999
# is read locked and the target branches write locked. The local
1000
# branch is the low-latency branch.
1001
self['post_pull'] = []
1002
# invoked after a commit operation completes.
1003
# the api signature is
1004
# (local, master, old_revno, old_revid, new_revno, new_revid)
1005
# old_revid is NULL_REVISION for the first commit to a branch.
1006
self['post_commit'] = []
1007
# invoked after a uncommit operation completes.
1008
# the api signature is
1009
# (local, master, old_revno, old_revid, new_revno, new_revid) where
1010
# local is the local branch or None, master is the target branch,
1011
# and an empty branch recieves new_revno of 0, new_revid of None.
1012
self['post_uncommit'] = []
1015
# install the default hooks into the Branch class.
1016
Branch.hooks = BranchHooks()
1019
class BzrBranchFormat4(BranchFormat):
1020
"""Bzr branch format 4.
1023
- a revision-history file.
1024
- a branch-lock lock file [ to be shared with the bzrdir ]
1027
def get_format_description(self):
1028
"""See BranchFormat.get_format_description()."""
1029
return "Branch format 4"
1031
def initialize(self, a_bzrdir):
1032
"""Create a branch of this format in a_bzrdir."""
1033
utf8_files = [('revision-history', ''),
1034
('branch-name', ''),
1036
return self._initialize_helper(a_bzrdir, utf8_files,
1037
lock_type='branch4', set_format=False)
1040
super(BzrBranchFormat4, self).__init__()
1041
self._matchingbzrdir = bzrdir.BzrDirFormat6()
1043
def open(self, a_bzrdir, _found=False):
1044
"""Return the branch object for a_bzrdir
1046
_found is a private parameter, do not use it. It is used to indicate
1047
if format probing has already be done.
1050
# we are being called directly and must probe.
1051
raise NotImplementedError
1052
return BzrBranch(_format=self,
1053
_control_files=a_bzrdir._control_files,
1055
_repository=a_bzrdir.open_repository())
1058
return "Bazaar-NG branch format 4"
1061
class BzrBranchFormat5(BranchFormat):
1062
"""Bzr branch format 5.
1065
- a revision-history file.
1067
- a lock dir guarding the branch itself
1068
- all of this stored in a branch/ subdirectory
1069
- works with shared repositories.
1071
This format is new in bzr 0.8.
1074
def get_format_string(self):
1075
"""See BranchFormat.get_format_string()."""
1076
return "Bazaar-NG branch format 5\n"
1078
def get_format_description(self):
1079
"""See BranchFormat.get_format_description()."""
1080
return "Branch format 5"
1082
def initialize(self, a_bzrdir):
1083
"""Create a branch of this format in a_bzrdir."""
1084
utf8_files = [('revision-history', ''),
1085
('branch-name', ''),
1087
return self._initialize_helper(a_bzrdir, utf8_files)
1090
super(BzrBranchFormat5, self).__init__()
1091
self._matchingbzrdir = bzrdir.BzrDirMetaFormat1()
1093
def open(self, a_bzrdir, _found=False):
1094
"""Return the branch object for a_bzrdir
1096
_found is a private parameter, do not use it. It is used to indicate
1097
if format probing has already be done.
1100
format = BranchFormat.find_format(a_bzrdir)
1101
assert format.__class__ == self.__class__
1103
transport = a_bzrdir.get_branch_transport(None)
1104
control_files = lockable_files.LockableFiles(transport, 'lock',
1106
return BzrBranch5(_format=self,
1107
_control_files=control_files,
1109
_repository=a_bzrdir.find_repository())
1111
raise NotBranchError(path=transport.base)
1114
class BzrBranchFormat6(BzrBranchFormat5):
1115
"""Branch format with last-revision and tags.
1117
Unlike previous formats, this has no explicit revision history. Instead,
1118
this just stores the last-revision, and the left-hand history leading
1119
up to there is the history.
1121
This format was introduced in bzr 0.15
1122
and became the default in 0.91.
1125
def get_format_string(self):
1126
"""See BranchFormat.get_format_string()."""
1127
return "Bazaar Branch Format 6 (bzr 0.15)\n"
1129
def get_format_description(self):
1130
"""See BranchFormat.get_format_description()."""
1131
return "Branch format 6"
1133
def initialize(self, a_bzrdir):
1134
"""Create a branch of this format in a_bzrdir."""
1135
utf8_files = [('last-revision', '0 null:\n'),
1136
('branch-name', ''),
1137
('branch.conf', ''),
1140
return self._initialize_helper(a_bzrdir, utf8_files)
1142
def open(self, a_bzrdir, _found=False):
1143
"""Return the branch object for a_bzrdir
1145
_found is a private parameter, do not use it. It is used to indicate
1146
if format probing has already be done.
1149
format = BranchFormat.find_format(a_bzrdir)
1150
assert format.__class__ == self.__class__
1151
transport = a_bzrdir.get_branch_transport(None)
1152
control_files = lockable_files.LockableFiles(transport, 'lock',
1154
return BzrBranch6(_format=self,
1155
_control_files=control_files,
1157
_repository=a_bzrdir.find_repository())
1159
def supports_tags(self):
1163
class BranchReferenceFormat(BranchFormat):
1164
"""Bzr branch reference format.
1166
Branch references are used in implementing checkouts, they
1167
act as an alias to the real branch which is at some other url.
1174
def get_format_string(self):
1175
"""See BranchFormat.get_format_string()."""
1176
return "Bazaar-NG Branch Reference Format 1\n"
1178
def get_format_description(self):
1179
"""See BranchFormat.get_format_description()."""
1180
return "Checkout reference format 1"
1182
def get_reference(self, a_bzrdir):
1183
"""See BranchFormat.get_reference()."""
1184
transport = a_bzrdir.get_branch_transport(None)
1185
return transport.get('location').read()
1187
def initialize(self, a_bzrdir, target_branch=None):
1188
"""Create a branch of this format in a_bzrdir."""
1189
if target_branch is None:
1190
# this format does not implement branch itself, thus the implicit
1191
# creation contract must see it as uninitializable
1192
raise errors.UninitializableFormat(self)
1193
mutter('creating branch reference in %s', a_bzrdir.transport.base)
1194
branch_transport = a_bzrdir.get_branch_transport(self)
1195
branch_transport.put_bytes('location',
1196
target_branch.bzrdir.root_transport.base)
1197
branch_transport.put_bytes('format', self.get_format_string())
1198
return self.open(a_bzrdir, _found=True)
1201
super(BranchReferenceFormat, self).__init__()
1202
self._matchingbzrdir = bzrdir.BzrDirMetaFormat1()
1204
def _make_reference_clone_function(format, a_branch):
1205
"""Create a clone() routine for a branch dynamically."""
1206
def clone(to_bzrdir, revision_id=None):
1207
"""See Branch.clone()."""
1208
return format.initialize(to_bzrdir, a_branch)
1209
# cannot obey revision_id limits when cloning a reference ...
1210
# FIXME RBC 20060210 either nuke revision_id for clone, or
1211
# emit some sort of warning/error to the caller ?!
1214
def open(self, a_bzrdir, _found=False, location=None):
1215
"""Return the branch that the branch reference in a_bzrdir points at.
1217
_found is a private parameter, do not use it. It is used to indicate
1218
if format probing has already be done.
1221
format = BranchFormat.find_format(a_bzrdir)
1222
assert format.__class__ == self.__class__
1223
if location is None:
1224
location = self.get_reference(a_bzrdir)
1225
real_bzrdir = bzrdir.BzrDir.open(location)
1226
result = real_bzrdir.open_branch()
1227
# this changes the behaviour of result.clone to create a new reference
1228
# rather than a copy of the content of the branch.
1229
# I did not use a proxy object because that needs much more extensive
1230
# testing, and we are only changing one behaviour at the moment.
1231
# If we decide to alter more behaviours - i.e. the implicit nickname
1232
# then this should be refactored to introduce a tested proxy branch
1233
# and a subclass of that for use in overriding clone() and ....
1235
result.clone = self._make_reference_clone_function(result)
1239
# formats which have no format string are not discoverable
1240
# and not independently creatable, so are not registered.
1241
__format5 = BzrBranchFormat5()
1242
__format6 = BzrBranchFormat6()
1243
BranchFormat.register_format(__format5)
1244
BranchFormat.register_format(BranchReferenceFormat())
1245
BranchFormat.register_format(__format6)
1246
BranchFormat.set_default_format(__format6)
1247
_legacy_formats = [BzrBranchFormat4(),
1250
class BzrBranch(Branch):
1251
"""A branch stored in the actual filesystem.
1253
Note that it's "local" in the context of the filesystem; it doesn't
1254
really matter if it's on an nfs/smb/afs/coda/... share, as long as
1255
it's writable, and can be accessed via the normal filesystem API.
1258
def __init__(self, _format=None,
1259
_control_files=None, a_bzrdir=None, _repository=None):
1260
"""Create new branch object at a particular location."""
1261
Branch.__init__(self)
1262
if a_bzrdir is None:
1263
raise ValueError('a_bzrdir must be supplied')
1265
self.bzrdir = a_bzrdir
1266
# self._transport used to point to the directory containing the
1267
# control directory, but was not used - now it's just the transport
1268
# for the branch control files. mbp 20070212
1269
self._base = self.bzrdir.transport.clone('..').base
1270
self._format = _format
1271
if _control_files is None:
1272
raise ValueError('BzrBranch _control_files is None')
1273
self.control_files = _control_files
1274
self._transport = _control_files._transport
1275
self.repository = _repository
1278
return '%s(%r)' % (self.__class__.__name__, self.base)
1282
def _get_base(self):
1283
"""Returns the directory containing the control directory."""
1286
base = property(_get_base, doc="The URL for the root of this branch.")
1288
def abspath(self, name):
1289
"""See Branch.abspath."""
1290
return self.control_files._transport.abspath(name)
1293
@deprecated_method(zero_sixteen)
1295
def get_root_id(self):
1296
"""See Branch.get_root_id."""
1297
tree = self.repository.revision_tree(self.last_revision())
1298
return tree.inventory.root.file_id
1300
def is_locked(self):
1301
return self.control_files.is_locked()
1303
def lock_write(self, token=None):
1304
repo_token = self.repository.lock_write()
1306
token = self.control_files.lock_write(token=token)
1308
self.repository.unlock()
1312
def lock_read(self):
1313
self.repository.lock_read()
1315
self.control_files.lock_read()
1317
self.repository.unlock()
1321
# TODO: test for failed two phase locks. This is known broken.
1323
self.control_files.unlock()
1325
self.repository.unlock()
1326
if not self.control_files.is_locked():
1327
# we just released the lock
1328
self._clear_cached_state()
1330
def peek_lock_mode(self):
1331
if self.control_files._lock_count == 0:
1334
return self.control_files._lock_mode
1336
def get_physical_lock_status(self):
1337
return self.control_files.get_physical_lock_status()
1340
def print_file(self, file, revision_id):
1341
"""See Branch.print_file."""
1342
return self.repository.print_file(file, revision_id)
1344
def _write_revision_history(self, history):
1345
"""Factored out of set_revision_history.
1347
This performs the actual writing to disk.
1348
It is intended to be called by BzrBranch5.set_revision_history."""
1349
self.control_files.put_bytes(
1350
'revision-history', '\n'.join(history))
1353
def set_revision_history(self, rev_history):
1354
"""See Branch.set_revision_history."""
1355
rev_history = [osutils.safe_revision_id(r) for r in rev_history]
1356
self._clear_cached_state()
1357
self._write_revision_history(rev_history)
1358
self._cache_revision_history(rev_history)
1359
for hook in Branch.hooks['set_rh']:
1360
hook(self, rev_history)
1363
def set_last_revision_info(self, revno, revision_id):
1364
"""Set the last revision of this branch.
1366
The caller is responsible for checking that the revno is correct
1367
for this revision id.
1369
It may be possible to set the branch last revision to an id not
1370
present in the repository. However, branches can also be
1371
configured to check constraints on history, in which case this may not
1374
revision_id = osutils.safe_revision_id(revision_id)
1375
history = self._lefthand_history(revision_id)
1376
assert len(history) == revno, '%d != %d' % (len(history), revno)
1377
self.set_revision_history(history)
1379
def _gen_revision_history(self):
1380
history = self.control_files.get('revision-history').read().split('\n')
1381
if history[-1:] == ['']:
1382
# There shouldn't be a trailing newline, but just in case.
1386
def _lefthand_history(self, revision_id, last_rev=None,
1388
# stop_revision must be a descendant of last_revision
1389
stop_graph = self.repository.get_revision_graph(revision_id)
1390
if (last_rev is not None and last_rev != _mod_revision.NULL_REVISION
1391
and last_rev not in stop_graph):
1392
# our previous tip is not merged into stop_revision
1393
raise errors.DivergedBranches(self, other_branch)
1394
# make a new revision history from the graph
1395
current_rev_id = revision_id
1397
while current_rev_id not in (None, _mod_revision.NULL_REVISION):
1398
new_history.append(current_rev_id)
1399
current_rev_id_parents = stop_graph[current_rev_id]
1401
current_rev_id = current_rev_id_parents[0]
1403
current_rev_id = None
1404
new_history.reverse()
1408
def generate_revision_history(self, revision_id, last_rev=None,
1410
"""Create a new revision history that will finish with revision_id.
1412
:param revision_id: the new tip to use.
1413
:param last_rev: The previous last_revision. If not None, then this
1414
must be a ancestory of revision_id, or DivergedBranches is raised.
1415
:param other_branch: The other branch that DivergedBranches should
1416
raise with respect to.
1418
revision_id = osutils.safe_revision_id(revision_id)
1419
self.set_revision_history(self._lefthand_history(revision_id,
1420
last_rev, other_branch))
1423
def update_revisions(self, other, stop_revision=None):
1424
"""See Branch.update_revisions."""
1427
if stop_revision is None:
1428
stop_revision = other.last_revision()
1429
if stop_revision is None:
1430
# if there are no commits, we're done.
1433
stop_revision = osutils.safe_revision_id(stop_revision)
1434
# whats the current last revision, before we fetch [and change it
1436
last_rev = _mod_revision.ensure_null(self.last_revision())
1437
# we fetch here regardless of whether we need to so that we pickup
1439
self.fetch(other, stop_revision)
1440
if self.repository.get_graph().is_ancestor(stop_revision,
1443
self.generate_revision_history(stop_revision, last_rev=last_rev,
1448
def basis_tree(self):
1449
"""See Branch.basis_tree."""
1450
return self.repository.revision_tree(self.last_revision())
1453
def pull(self, source, overwrite=False, stop_revision=None,
1454
_hook_master=None, run_hooks=True):
1457
:param _hook_master: Private parameter - set the branch to
1458
be supplied as the master to push hooks.
1459
:param run_hooks: Private parameter - if false, this branch
1460
is being called because it's the master of the primary branch,
1461
so it should not run its hooks.
1463
result = PullResult()
1464
result.source_branch = source
1465
result.target_branch = self
1468
result.old_revno, result.old_revid = self.last_revision_info()
1470
self.update_revisions(source, stop_revision)
1471
except DivergedBranches:
1475
if stop_revision is None:
1476
stop_revision = source.last_revision()
1477
self.generate_revision_history(stop_revision)
1478
result.tag_conflicts = source.tags.merge_to(self.tags)
1479
result.new_revno, result.new_revid = self.last_revision_info()
1481
result.master_branch = _hook_master
1482
result.local_branch = self
1484
result.master_branch = self
1485
result.local_branch = None
1487
for hook in Branch.hooks['post_pull']:
1493
def _get_parent_location(self):
1494
_locs = ['parent', 'pull', 'x-pull']
1497
return self.control_files.get(l).read().strip('\n')
1503
def push(self, target, overwrite=False, stop_revision=None,
1504
_override_hook_source_branch=None):
1507
This is the basic concrete implementation of push()
1509
:param _override_hook_source_branch: If specified, run
1510
the hooks passing this Branch as the source, rather than self.
1511
This is for use of RemoteBranch, where push is delegated to the
1512
underlying vfs-based Branch.
1514
# TODO: Public option to disable running hooks - should be trivial but
1518
result = self._push_with_bound_branches(target, overwrite,
1520
_override_hook_source_branch=_override_hook_source_branch)
1525
def _push_with_bound_branches(self, target, overwrite,
1527
_override_hook_source_branch=None):
1528
"""Push from self into target, and into target's master if any.
1530
This is on the base BzrBranch class even though it doesn't support
1531
bound branches because the *target* might be bound.
1534
if _override_hook_source_branch:
1535
result.source_branch = _override_hook_source_branch
1536
for hook in Branch.hooks['post_push']:
1539
bound_location = target.get_bound_location()
1540
if bound_location and target.base != bound_location:
1541
# there is a master branch.
1543
# XXX: Why the second check? Is it even supported for a branch to
1544
# be bound to itself? -- mbp 20070507
1545
master_branch = target.get_master_branch()
1546
master_branch.lock_write()
1548
# push into the master from this branch.
1549
self._basic_push(master_branch, overwrite, stop_revision)
1550
# and push into the target branch from this. Note that we push from
1551
# this branch again, because its considered the highest bandwidth
1553
result = self._basic_push(target, overwrite, stop_revision)
1554
result.master_branch = master_branch
1555
result.local_branch = target
1559
master_branch.unlock()
1562
result = self._basic_push(target, overwrite, stop_revision)
1563
# TODO: Why set master_branch and local_branch if there's no
1564
# binding? Maybe cleaner to just leave them unset? -- mbp
1566
result.master_branch = target
1567
result.local_branch = None
1571
def _basic_push(self, target, overwrite, stop_revision):
1572
"""Basic implementation of push without bound branches or hooks.
1574
Must be called with self read locked and target write locked.
1576
result = PushResult()
1577
result.source_branch = self
1578
result.target_branch = target
1579
result.old_revno, result.old_revid = target.last_revision_info()
1581
target.update_revisions(self, stop_revision)
1582
except DivergedBranches:
1586
target.set_revision_history(self.revision_history())
1587
result.tag_conflicts = self.tags.merge_to(target.tags)
1588
result.new_revno, result.new_revid = target.last_revision_info()
1591
def get_parent(self):
1592
"""See Branch.get_parent."""
1594
assert self.base[-1] == '/'
1595
parent = self._get_parent_location()
1598
# This is an old-format absolute path to a local branch
1599
# turn it into a url
1600
if parent.startswith('/'):
1601
parent = urlutils.local_path_to_url(parent.decode('utf8'))
1603
return urlutils.join(self.base[:-1], parent)
1604
except errors.InvalidURLJoin, e:
1605
raise errors.InaccessibleParent(parent, self.base)
1607
def set_push_location(self, location):
1608
"""See Branch.set_push_location."""
1609
self.get_config().set_user_option(
1610
'push_location', location,
1611
store=_mod_config.STORE_LOCATION_NORECURSE)
1614
def set_parent(self, url):
1615
"""See Branch.set_parent."""
1616
# TODO: Maybe delete old location files?
1617
# URLs should never be unicode, even on the local fs,
1618
# FIXUP this and get_parent in a future branch format bump:
1619
# read and rewrite the file, and have the new format code read
1620
# using .get not .get_utf8. RBC 20060125
1622
if isinstance(url, unicode):
1624
url = url.encode('ascii')
1625
except UnicodeEncodeError:
1626
raise errors.InvalidURL(url,
1627
"Urls must be 7-bit ascii, "
1628
"use bzrlib.urlutils.escape")
1629
url = urlutils.relative_url(self.base, url)
1630
self._set_parent_location(url)
1632
def _set_parent_location(self, url):
1634
self.control_files._transport.delete('parent')
1636
assert isinstance(url, str)
1637
self.control_files.put_bytes('parent', url + '\n')
1640
class BzrBranch5(BzrBranch):
1641
"""A format 5 branch. This supports new features over plan branches.
1643
It has support for a master_branch which is the data for bound branches.
1651
super(BzrBranch5, self).__init__(_format=_format,
1652
_control_files=_control_files,
1654
_repository=_repository)
1657
def pull(self, source, overwrite=False, stop_revision=None,
1659
"""Pull from source into self, updating my master if any.
1661
:param run_hooks: Private parameter - if false, this branch
1662
is being called because it's the master of the primary branch,
1663
so it should not run its hooks.
1665
bound_location = self.get_bound_location()
1666
master_branch = None
1667
if bound_location and source.base != bound_location:
1668
# not pulling from master, so we need to update master.
1669
master_branch = self.get_master_branch()
1670
master_branch.lock_write()
1673
# pull from source into master.
1674
master_branch.pull(source, overwrite, stop_revision,
1676
return super(BzrBranch5, self).pull(source, overwrite,
1677
stop_revision, _hook_master=master_branch,
1678
run_hooks=run_hooks)
1681
master_branch.unlock()
1683
def get_bound_location(self):
1685
return self.control_files.get_utf8('bound').read()[:-1]
1686
except errors.NoSuchFile:
1690
def get_master_branch(self):
1691
"""Return the branch we are bound to.
1693
:return: Either a Branch, or None
1695
This could memoise the branch, but if thats done
1696
it must be revalidated on each new lock.
1697
So for now we just don't memoise it.
1698
# RBC 20060304 review this decision.
1700
bound_loc = self.get_bound_location()
1704
return Branch.open(bound_loc)
1705
except (errors.NotBranchError, errors.ConnectionError), e:
1706
raise errors.BoundBranchConnectionFailure(
1710
def set_bound_location(self, location):
1711
"""Set the target where this branch is bound to.
1713
:param location: URL to the target branch
1716
self.control_files.put_utf8('bound', location+'\n')
1719
self.control_files._transport.delete('bound')
1725
def bind(self, other):
1726
"""Bind this branch to the branch other.
1728
This does not push or pull data between the branches, though it does
1729
check for divergence to raise an error when the branches are not
1730
either the same, or one a prefix of the other. That behaviour may not
1731
be useful, so that check may be removed in future.
1733
:param other: The branch to bind to
1736
# TODO: jam 20051230 Consider checking if the target is bound
1737
# It is debatable whether you should be able to bind to
1738
# a branch which is itself bound.
1739
# Committing is obviously forbidden,
1740
# but binding itself may not be.
1741
# Since we *have* to check at commit time, we don't
1742
# *need* to check here
1744
# we want to raise diverged if:
1745
# last_rev is not in the other_last_rev history, AND
1746
# other_last_rev is not in our history, and do it without pulling
1748
last_rev = _mod_revision.ensure_null(self.last_revision())
1749
if last_rev != _mod_revision.NULL_REVISION:
1752
other_last_rev = other.last_revision()
1753
if not _mod_revision.is_null(other_last_rev):
1754
# neither branch is new, we have to do some work to
1755
# ascertain diversion.
1756
remote_graph = other.repository.get_revision_graph(
1758
local_graph = self.repository.get_revision_graph(last_rev)
1759
if (last_rev not in remote_graph and
1760
other_last_rev not in local_graph):
1761
raise errors.DivergedBranches(self, other)
1764
self.set_bound_location(other.base)
1768
"""If bound, unbind"""
1769
return self.set_bound_location(None)
1773
"""Synchronise this branch with the master branch if any.
1775
:return: None or the last_revision that was pivoted out during the
1778
master = self.get_master_branch()
1779
if master is not None:
1780
old_tip = _mod_revision.ensure_null(self.last_revision())
1781
self.pull(master, overwrite=True)
1782
if self.repository.get_graph().is_ancestor(old_tip,
1783
_mod_revision.ensure_null(self.last_revision())):
1789
class BzrBranchExperimental(BzrBranch5):
1790
"""Bzr experimental branch format
1793
- a revision-history file.
1795
- a lock dir guarding the branch itself
1796
- all of this stored in a branch/ subdirectory
1797
- works with shared repositories.
1798
- a tag dictionary in the branch
1800
This format is new in bzr 0.15, but shouldn't be used for real data,
1803
This class acts as it's own BranchFormat.
1806
_matchingbzrdir = bzrdir.BzrDirMetaFormat1()
1809
def get_format_string(cls):
1810
"""See BranchFormat.get_format_string()."""
1811
return "Bazaar-NG branch format experimental\n"
1814
def get_format_description(cls):
1815
"""See BranchFormat.get_format_description()."""
1816
return "Experimental branch format"
1819
def get_reference(cls, a_bzrdir):
1820
"""Get the target reference of the branch in a_bzrdir.
1822
format probing must have been completed before calling
1823
this method - it is assumed that the format of the branch
1824
in a_bzrdir is correct.
1826
:param a_bzrdir: The bzrdir to get the branch data from.
1827
:return: None if the branch is not a reference branch.
1832
def _initialize_control_files(cls, a_bzrdir, utf8_files, lock_filename,
1834
branch_transport = a_bzrdir.get_branch_transport(cls)
1835
control_files = lockable_files.LockableFiles(branch_transport,
1836
lock_filename, lock_class)
1837
control_files.create_lock()
1838
control_files.lock_write()
1840
for filename, content in utf8_files:
1841
control_files.put_utf8(filename, content)
1843
control_files.unlock()
1846
def initialize(cls, a_bzrdir):
1847
"""Create a branch of this format in a_bzrdir."""
1848
utf8_files = [('format', cls.get_format_string()),
1849
('revision-history', ''),
1850
('branch-name', ''),
1853
cls._initialize_control_files(a_bzrdir, utf8_files,
1854
'lock', lockdir.LockDir)
1855
return cls.open(a_bzrdir, _found=True)
1858
def open(cls, a_bzrdir, _found=False):
1859
"""Return the branch object for a_bzrdir
1861
_found is a private parameter, do not use it. It is used to indicate
1862
if format probing has already be done.
1865
format = BranchFormat.find_format(a_bzrdir)
1866
assert format.__class__ == cls
1867
transport = a_bzrdir.get_branch_transport(None)
1868
control_files = lockable_files.LockableFiles(transport, 'lock',
1870
return cls(_format=cls,
1871
_control_files=control_files,
1873
_repository=a_bzrdir.find_repository())
1876
def is_supported(cls):
1879
def _make_tags(self):
1880
return BasicTags(self)
1883
def supports_tags(cls):
1887
BranchFormat.register_format(BzrBranchExperimental)
1890
class BzrBranch6(BzrBranch5):
1893
def last_revision_info(self):
1894
revision_string = self.control_files.get('last-revision').read()
1895
revno, revision_id = revision_string.rstrip('\n').split(' ', 1)
1896
revision_id = cache_utf8.get_cached_utf8(revision_id)
1898
return revno, revision_id
1900
def last_revision(self):
1901
"""Return last revision id, or None"""
1902
revision_id = self.last_revision_info()[1]
1903
if revision_id == _mod_revision.NULL_REVISION:
1907
def _write_last_revision_info(self, revno, revision_id):
1908
"""Simply write out the revision id, with no checks.
1910
Use set_last_revision_info to perform this safely.
1912
Does not update the revision_history cache.
1913
Intended to be called by set_last_revision_info and
1914
_write_revision_history.
1916
if revision_id is None:
1917
revision_id = 'null:'
1918
out_string = '%d %s\n' % (revno, revision_id)
1919
self.control_files.put_bytes('last-revision', out_string)
1922
def set_last_revision_info(self, revno, revision_id):
1923
revision_id = osutils.safe_revision_id(revision_id)
1924
if self._get_append_revisions_only():
1925
self._check_history_violation(revision_id)
1926
self._write_last_revision_info(revno, revision_id)
1927
self._clear_cached_state()
1929
def _check_history_violation(self, revision_id):
1930
last_revision = _mod_revision.ensure_null(self.last_revision())
1931
if _mod_revision.is_null(last_revision):
1933
if last_revision not in self._lefthand_history(revision_id):
1934
raise errors.AppendRevisionsOnlyViolation(self.base)
1936
def _gen_revision_history(self):
1937
"""Generate the revision history from last revision
1939
history = list(self.repository.iter_reverse_revision_history(
1940
self.last_revision()))
1944
def _write_revision_history(self, history):
1945
"""Factored out of set_revision_history.
1947
This performs the actual writing to disk, with format-specific checks.
1948
It is intended to be called by BzrBranch5.set_revision_history.
1950
if len(history) == 0:
1951
last_revision = 'null:'
1953
if history != self._lefthand_history(history[-1]):
1954
raise errors.NotLefthandHistory(history)
1955
last_revision = history[-1]
1956
if self._get_append_revisions_only():
1957
self._check_history_violation(last_revision)
1958
self._write_last_revision_info(len(history), last_revision)
1961
def _set_parent_location(self, url):
1962
"""Set the parent branch"""
1963
self._set_config_location('parent_location', url, make_relative=True)
1966
def _get_parent_location(self):
1967
"""Set the parent branch"""
1968
return self._get_config_location('parent_location')
1970
def set_push_location(self, location):
1971
"""See Branch.set_push_location."""
1972
self._set_config_location('push_location', location)
1974
def set_bound_location(self, location):
1975
"""See Branch.set_push_location."""
1977
config = self.get_config()
1978
if location is None:
1979
if config.get_user_option('bound') != 'True':
1982
config.set_user_option('bound', 'False', warn_masked=True)
1985
self._set_config_location('bound_location', location,
1987
config.set_user_option('bound', 'True', warn_masked=True)
1990
def _get_bound_location(self, bound):
1991
"""Return the bound location in the config file.
1993
Return None if the bound parameter does not match"""
1994
config = self.get_config()
1995
config_bound = (config.get_user_option('bound') == 'True')
1996
if config_bound != bound:
1998
return self._get_config_location('bound_location', config=config)
2000
def get_bound_location(self):
2001
"""See Branch.set_push_location."""
2002
return self._get_bound_location(True)
2004
def get_old_bound_location(self):
2005
"""See Branch.get_old_bound_location"""
2006
return self._get_bound_location(False)
2008
def set_append_revisions_only(self, enabled):
2013
self.get_config().set_user_option('append_revisions_only', value,
2016
def _get_append_revisions_only(self):
2017
value = self.get_config().get_user_option('append_revisions_only')
2018
return value == 'True'
2020
def _synchronize_history(self, destination, revision_id):
2021
"""Synchronize last revision and revision history between branches.
2023
This version is most efficient when the destination is also a
2024
BzrBranch6, but works for BzrBranch5, as long as the destination's
2025
repository contains all the lefthand ancestors of the intended
2026
last_revision. If not, set_last_revision_info will fail.
2028
:param destination: The branch to copy the history into
2029
:param revision_id: The revision-id to truncate history at. May
2030
be None to copy complete history.
2032
source_revno, source_revision_id = self.last_revision_info()
2033
if revision_id is None:
2034
revno, revision_id = source_revno, source_revision_id
2035
elif source_revision_id == revision_id:
2036
# we know the revno without needing to walk all of history
2037
revno = source_revno
2039
# To figure out the revno for a random revision, we need to build
2040
# the revision history, and count its length.
2041
# We don't care about the order, just how long it is.
2042
# Alternatively, we could start at the current location, and count
2043
# backwards. But there is no guarantee that we will find it since
2044
# it may be a merged revision.
2045
revno = len(list(self.repository.iter_reverse_revision_history(
2047
destination.set_last_revision_info(revno, revision_id)
2049
def _make_tags(self):
2050
return BasicTags(self)
2053
######################################################################
2054
# results of operations
2057
class _Result(object):
2059
def _show_tag_conficts(self, to_file):
2060
if not getattr(self, 'tag_conflicts', None):
2062
to_file.write('Conflicting tags:\n')
2063
for name, value1, value2 in self.tag_conflicts:
2064
to_file.write(' %s\n' % (name, ))
2067
class PullResult(_Result):
2068
"""Result of a Branch.pull operation.
2070
:ivar old_revno: Revision number before pull.
2071
:ivar new_revno: Revision number after pull.
2072
:ivar old_revid: Tip revision id before pull.
2073
:ivar new_revid: Tip revision id after pull.
2074
:ivar source_branch: Source (local) branch object.
2075
:ivar master_branch: Master branch of the target, or None.
2076
:ivar target_branch: Target/destination branch object.
2080
# DEPRECATED: pull used to return the change in revno
2081
return self.new_revno - self.old_revno
2083
def report(self, to_file):
2084
if self.old_revid == self.new_revid:
2085
to_file.write('No revisions to pull.\n')
2087
to_file.write('Now on revision %d.\n' % self.new_revno)
2088
self._show_tag_conficts(to_file)
2091
class PushResult(_Result):
2092
"""Result of a Branch.push operation.
2094
:ivar old_revno: Revision number before push.
2095
:ivar new_revno: Revision number after push.
2096
:ivar old_revid: Tip revision id before push.
2097
:ivar new_revid: Tip revision id after push.
2098
:ivar source_branch: Source branch object.
2099
:ivar master_branch: Master branch of the target, or None.
2100
:ivar target_branch: Target/destination branch object.
2104
# DEPRECATED: push used to return the change in revno
2105
return self.new_revno - self.old_revno
2107
def report(self, to_file):
2108
"""Write a human-readable description of the result."""
2109
if self.old_revid == self.new_revid:
2110
to_file.write('No new revisions to push.\n')
2112
to_file.write('Pushed up to revision %d.\n' % self.new_revno)
2113
self._show_tag_conficts(to_file)
2116
class BranchCheckResult(object):
2117
"""Results of checking branch consistency.
2122
def __init__(self, branch):
2123
self.branch = branch
2125
def report_results(self, verbose):
2126
"""Report the check results via trace.note.
2128
:param verbose: Requests more detailed display of what was checked,
2131
note('checked branch %s format %s',
2133
self.branch._format)
2136
class Converter5to6(object):
2137
"""Perform an in-place upgrade of format 5 to format 6"""
2139
def convert(self, branch):
2140
# Data for 5 and 6 can peacefully coexist.
2141
format = BzrBranchFormat6()
2142
new_branch = format.open(branch.bzrdir, _found=True)
2144
# Copy source data into target
2145
new_branch.set_last_revision_info(*branch.last_revision_info())
2146
new_branch.set_parent(branch.get_parent())
2147
new_branch.set_bound_location(branch.get_bound_location())
2148
new_branch.set_push_location(branch.get_push_location())
2150
# New branch has no tags by default
2151
new_branch.tags._set_tag_dict({})
2153
# Copying done; now update target format
2154
new_branch.control_files.put_utf8('format',
2155
format.get_format_string())
2157
# Clean up old files
2158
new_branch.control_files._transport.delete('revision-history')
2160
branch.set_parent(None)
2163
branch.set_bound_location(None)
added
removed
bzrlib/branch.py
