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# Copyright (C) 2005, 2006, 2007, 2008 Canonical Ltd
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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from bzrlib.lazy_import import lazy_import
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lazy_import(globals(), """
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from itertools import chain
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config as _mod_config,
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revision as _mod_revision,
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from bzrlib.config import BranchConfig
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from bzrlib.repofmt.pack_repo import RepositoryFormatKnitPack5RichRoot
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from bzrlib.tag import (
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from bzrlib.decorators import needs_read_lock, needs_write_lock
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from bzrlib.hooks import Hooks
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from bzrlib.symbol_versioning import (
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from bzrlib.trace import mutter, mutter_callsite, note, is_quiet
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BZR_BRANCH_FORMAT_4 = "Bazaar-NG branch, format 0.0.4\n"
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BZR_BRANCH_FORMAT_5 = "Bazaar-NG branch, format 5\n"
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BZR_BRANCH_FORMAT_6 = "Bazaar Branch Format 6 (bzr 0.15)\n"
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# TODO: Maybe include checks for common corruption of newlines, etc?
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# TODO: Some operations like log might retrieve the same revisions
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# repeatedly to calculate deltas. We could perhaps have a weakref
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# cache in memory to make this faster. In general anything can be
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# cached in memory between lock and unlock operations. .. nb thats
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# what the transaction identity map provides
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######################################################################
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"""Branch holding a history of revisions.
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Base directory/url of the branch.
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hooks: An instance of BranchHooks.
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# this is really an instance variable - FIXME move it there
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# override this to set the strategy for storing tags
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return DisabledTags(self)
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def __init__(self, *ignored, **ignored_too):
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self.tags = self._make_tags()
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self._revision_history_cache = None
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self._revision_id_to_revno_cache = None
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self._last_revision_info_cache = None
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hooks = Branch.hooks['open']
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"""Called by init to allow simpler extension of the base class."""
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def 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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def _get_nick(self, possible_transports=None):
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config = self.get_config()
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if not config.has_explicit_nickname(): # explicit overrides master
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master = self.get_master_branch(possible_transports)
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if master is not None:
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# return the master branch value
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config = master.get_config()
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except errors.BzrError, e:
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# Silently fall back to local implicit nick if the master is
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mutter("Could not connect to bound branch, "
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"falling back to local nick.\n " + str(e))
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return config.get_nickname()
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def _set_nick(self, nick):
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self.get_config().set_user_option('nickname', nick, warn_masked=True)
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nick = property(_get_nick, _set_nick)
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raise NotImplementedError(self.is_locked)
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def lock_write(self):
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raise NotImplementedError(self.lock_write)
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raise NotImplementedError(self.lock_read)
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raise NotImplementedError(self.unlock)
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def peek_lock_mode(self):
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"""Return lock mode for the Branch: 'r', 'w' or None"""
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raise NotImplementedError(self.peek_lock_mode)
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def get_physical_lock_status(self):
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raise NotImplementedError(self.get_physical_lock_status)
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def get_revision_id_to_revno_map(self):
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"""Return the revision_id => dotted revno map.
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This will be regenerated on demand, but will be cached.
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:return: A dictionary mapping revision_id => dotted revno.
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This dictionary should not be modified by the caller.
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if self._revision_id_to_revno_cache is not None:
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mapping = self._revision_id_to_revno_cache
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mapping = self._gen_revno_map()
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self._cache_revision_id_to_revno(mapping)
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# TODO: jam 20070417 Since this is being cached, should we be returning
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# I would rather not, and instead just declare that users should not
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# modify the return value.
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def _gen_revno_map(self):
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"""Create a new mapping from revision ids to dotted revnos.
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Dotted revnos are generated based on the current tip in the revision
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This is the worker function for get_revision_id_to_revno_map, which
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just caches the return value.
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:return: A dictionary mapping revision_id => dotted revno.
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last_revision = self.last_revision()
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revision_graph = repository._old_get_graph(self.repository,
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merge_sorted_revisions = tsort.merge_sort(
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revision_id_to_revno = dict((rev_id, revno)
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for seq_num, rev_id, depth, revno, end_of_merge
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in merge_sorted_revisions)
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return revision_id_to_revno
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def leave_lock_in_place(self):
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"""Tell this branch object not to release the physical lock when this
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If lock_write doesn't return a token, then this method is not supported.
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self.control_files.leave_in_place()
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def dont_leave_lock_in_place(self):
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"""Tell this branch object to release the physical lock when this
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object is unlocked, even if it didn't originally acquire it.
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If lock_write doesn't return a token, then this method is not supported.
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self.control_files.dont_leave_in_place()
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def bind(self, other):
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"""Bind the local branch the other branch.
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:param other: The branch to bind to
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raise errors.UpgradeRequired(self.base)
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def fetch(self, from_branch, last_revision=None, pb=None):
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"""Copy revisions from from_branch into this branch.
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:param from_branch: Where to copy from.
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:param last_revision: What revision to stop at (None for at the end
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:param pb: An optional progress bar to use.
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Returns the copied revision count and the failed revisions in a tuple:
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if self.base == from_branch.base:
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nested_pb = ui.ui_factory.nested_progress_bar()
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from_branch.lock_read()
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if last_revision is None:
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pb.update('get source history')
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last_revision = from_branch.last_revision()
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last_revision = _mod_revision.ensure_null(last_revision)
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return self.repository.fetch(from_branch.repository,
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revision_id=last_revision,
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if nested_pb is not None:
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def get_bound_location(self):
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"""Return the URL of the branch we are bound to.
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Older format branches cannot bind, please be sure to use a metadir
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def get_old_bound_location(self):
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"""Return the URL of the branch we used to be bound to
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raise errors.UpgradeRequired(self.base)
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def get_commit_builder(self, parents, config=None, timestamp=None,
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timezone=None, committer=None, revprops=None,
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"""Obtain a CommitBuilder for this branch.
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:param parents: Revision ids of the parents of the new revision.
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:param config: Optional configuration to use.
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:param timestamp: Optional timestamp recorded for commit.
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:param timezone: Optional timezone for timestamp.
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:param committer: Optional committer to set for commit.
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:param revprops: Optional dictionary of revision properties.
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:param revision_id: Optional revision id.
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config = self.get_config()
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return self.repository.get_commit_builder(self, parents, config,
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timestamp, timezone, committer, revprops, revision_id)
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def get_master_branch(self, possible_transports=None):
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"""Return the branch we are bound to.
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:return: Either a Branch, or None
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def get_revision_delta(self, revno):
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"""Return the delta for one revision.
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The delta is relative to its mainline predecessor, or the
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empty tree for revision 1.
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rh = self.revision_history()
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if not (1 <= revno <= len(rh)):
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raise errors.InvalidRevisionNumber(revno)
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return self.repository.get_revision_delta(rh[revno-1])
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def get_stacked_on_url(self):
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"""Get the URL this branch is stacked against.
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:raises NotStacked: If the branch is not stacked.
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:raises UnstackableBranchFormat: If the branch does not support
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raise NotImplementedError(self.get_stacked_on_url)
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def print_file(self, file, revision_id):
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"""Print `file` to stdout."""
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raise NotImplementedError(self.print_file)
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def set_revision_history(self, rev_history):
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raise NotImplementedError(self.set_revision_history)
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def set_stacked_on_url(self, url):
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"""Set the URL this branch is stacked against.
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:raises UnstackableBranchFormat: If the branch does not support
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:raises UnstackableRepositoryFormat: If the repository does not support
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raise NotImplementedError(self.set_stacked_on_url)
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def _cache_revision_history(self, rev_history):
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"""Set the cached revision history to rev_history.
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The revision_history method will use this cache to avoid regenerating
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the revision history.
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This API is semi-public; it only for use by subclasses, all other code
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should consider it to be private.
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self._revision_history_cache = rev_history
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def _cache_revision_id_to_revno(self, revision_id_to_revno):
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"""Set the cached revision_id => revno map to revision_id_to_revno.
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This API is semi-public; it only for use by subclasses, all other code
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should consider it to be private.
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self._revision_id_to_revno_cache = revision_id_to_revno
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def _clear_cached_state(self):
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"""Clear any cached data on this branch, e.g. cached revision history.
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This means the next call to revision_history will need to call
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_gen_revision_history.
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This API is semi-public; it only for use by subclasses, all other code
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should consider it to be private.
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self._revision_history_cache = None
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self._revision_id_to_revno_cache = None
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self._last_revision_info_cache = None
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def _gen_revision_history(self):
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"""Return sequence of revision hashes on to this branch.
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Unlike revision_history, this method always regenerates or rereads the
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revision history, i.e. it does not cache the result, so repeated calls
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Concrete subclasses should override this instead of revision_history so
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that subclasses do not need to deal with caching logic.
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This API is semi-public; it only for use by subclasses, all other code
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should consider it to be private.
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raise NotImplementedError(self._gen_revision_history)
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def revision_history(self):
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"""Return sequence of revision ids on this branch.
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This method will cache the revision history for as long as it is safe to
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if 'evil' in debug.debug_flags:
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mutter_callsite(3, "revision_history scales with history.")
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if self._revision_history_cache is not None:
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history = self._revision_history_cache
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history = self._gen_revision_history()
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self._cache_revision_history(history)
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"""Return current revision number for this branch.
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That is equivalent to the number of revisions committed to
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return self.last_revision_info()[0]
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"""Older format branches cannot bind or unbind."""
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raise errors.UpgradeRequired(self.base)
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def set_append_revisions_only(self, enabled):
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"""Older format branches are never restricted to append-only"""
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raise errors.UpgradeRequired(self.base)
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def last_revision(self):
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"""Return last revision id, or NULL_REVISION."""
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return self.last_revision_info()[1]
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def last_revision_info(self):
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"""Return information about the last revision.
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:return: A tuple (revno, revision_id).
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if self._last_revision_info_cache is None:
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self._last_revision_info_cache = self._last_revision_info()
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return self._last_revision_info_cache
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def _last_revision_info(self):
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rh = self.revision_history()
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return (revno, rh[-1])
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return (0, _mod_revision.NULL_REVISION)
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@deprecated_method(deprecated_in((1, 6, 0)))
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def missing_revisions(self, other, stop_revision=None):
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"""Return a list of new revisions that would perfectly fit.
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If self and other have not diverged, return a list of the revisions
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present in other, but missing from self.
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self_history = self.revision_history()
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self_len = len(self_history)
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other_history = other.revision_history()
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other_len = len(other_history)
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common_index = min(self_len, other_len) -1
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if common_index >= 0 and \
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self_history[common_index] != other_history[common_index]:
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raise errors.DivergedBranches(self, other)
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if stop_revision is None:
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stop_revision = other_len
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if stop_revision > other_len:
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raise errors.NoSuchRevision(self, stop_revision)
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return other_history[self_len:stop_revision]
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def update_revisions(self, other, stop_revision=None, overwrite=False,
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"""Pull in new perfect-fit revisions.
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:param other: Another Branch to pull from
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:param stop_revision: Updated until the given revision
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:param overwrite: Always set the branch pointer, rather than checking
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to see if it is a proper descendant.
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:param graph: A Graph object that can be used to query history
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information. This can be None.
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other_revno, other_last_revision = other.last_revision_info()
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stop_revno = None # unknown
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if stop_revision is None:
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stop_revision = other_last_revision
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if _mod_revision.is_null(stop_revision):
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# if there are no commits, we're done.
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stop_revno = other_revno
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# what's the current last revision, before we fetch [and change it
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last_rev = _mod_revision.ensure_null(self.last_revision())
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# we fetch here so that we don't process data twice in the common
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# case of having something to pull, and so that the check for
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# already merged can operate on the just fetched graph, which will
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# be cached in memory.
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self.fetch(other, stop_revision)
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# Check to see if one is an ancestor of the other
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graph = self.repository.get_graph()
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if self._check_if_descendant_or_diverged(
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stop_revision, last_rev, graph, other):
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# stop_revision is a descendant of last_rev, but we aren't
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# overwriting, so we're done.
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if stop_revno is None:
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graph = self.repository.get_graph()
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this_revno, this_last_revision = self.last_revision_info()
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stop_revno = graph.find_distance_to_null(stop_revision,
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[(other_last_revision, other_revno),
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(this_last_revision, this_revno)])
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self.set_last_revision_info(stop_revno, stop_revision)
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def revision_id_to_revno(self, revision_id):
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"""Given a revision id, return its revno"""
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if _mod_revision.is_null(revision_id):
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history = self.revision_history()
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return history.index(revision_id) + 1
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raise errors.NoSuchRevision(self, revision_id)
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def get_rev_id(self, revno, history=None):
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"""Find the revision id of the specified revno."""
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return _mod_revision.NULL_REVISION
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history = self.revision_history()
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if revno <= 0 or revno > len(history):
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raise errors.NoSuchRevision(self, revno)
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return history[revno - 1]
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def pull(self, source, overwrite=False, stop_revision=None,
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possible_transports=None, _override_hook_target=None):
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"""Mirror source into this branch.
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This branch is considered to be 'local', having low latency.
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:returns: PullResult instance
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raise NotImplementedError(self.pull)
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def push(self, target, overwrite=False, stop_revision=None):
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"""Mirror this branch into target.
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This branch is considered to be 'local', having low latency.
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raise NotImplementedError(self.push)
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def basis_tree(self):
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"""Return `Tree` object for last revision."""
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return self.repository.revision_tree(self.last_revision())
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def get_parent(self):
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"""Return the parent location of the branch.
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This is the default location for push/pull/missing. The usual
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pattern is that the user can override it by specifying a
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raise NotImplementedError(self.get_parent)
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def _set_config_location(self, name, url, config=None,
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make_relative=False):
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config = self.get_config()
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url = urlutils.relative_url(self.base, url)
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config.set_user_option(name, url, warn_masked=True)
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def _get_config_location(self, name, config=None):
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config = self.get_config()
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location = config.get_user_option(name)
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def get_submit_branch(self):
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"""Return the submit location of the branch.
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This is the default location for bundle. The usual
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pattern is that the user can override it by specifying a
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return self.get_config().get_user_option('submit_branch')
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def set_submit_branch(self, location):
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"""Return the submit location of the branch.
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This is the default location for bundle. The usual
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pattern is that the user can override it by specifying a
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self.get_config().set_user_option('submit_branch', location,
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def get_public_branch(self):
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"""Return the public location of the branch.
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This is is used by merge directives.
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return self._get_config_location('public_branch')
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def set_public_branch(self, location):
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"""Return the submit location of the branch.
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This is the default location for bundle. The usual
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pattern is that the user can override it by specifying a
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self._set_config_location('public_branch', location)
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def get_push_location(self):
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"""Return the None or the location to push this branch to."""
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push_loc = self.get_config().get_user_option('push_location')
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def set_push_location(self, location):
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"""Set a new push location for this branch."""
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raise NotImplementedError(self.set_push_location)
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def set_parent(self, url):
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raise NotImplementedError(self.set_parent)
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"""Synchronise this branch with the master branch if any.
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:return: None or the last_revision pivoted out during the update.
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def check_revno(self, revno):
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Check whether a revno corresponds to any revision.
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Zero (the NULL revision) is considered valid.
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self.check_real_revno(revno)
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def check_real_revno(self, revno):
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Check whether a revno corresponds to a real revision.
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Zero (the NULL revision) is considered invalid
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if revno < 1 or revno > self.revno():
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raise errors.InvalidRevisionNumber(revno)
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def clone(self, to_bzrdir, revision_id=None):
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"""Clone this branch into to_bzrdir preserving all semantic values.
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revision_id: if not None, the revision history in the new branch will
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be truncated to end with revision_id.
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result = to_bzrdir.create_branch()
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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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to_bzrdir controls the branch format.
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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 = to_bzrdir.create_branch()
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self.copy_content_into(result, revision_id=revision_id)
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result.set_parent(self.bzrdir.root_transport.base)
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def _synchronize_history(self, destination, revision_id):
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"""Synchronize last revision and revision history between branches.
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This version is most efficient when the destination is also a
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BzrBranch5, but works for BzrBranch6 as long as the revision
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history is the true lefthand parent history, and all of the revisions
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are in the destination's repository. If not, set_revision_history
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:param destination: The branch to copy the history into
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:param revision_id: The revision-id to truncate history at. May
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be None to copy complete history.
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if revision_id == _mod_revision.NULL_REVISION:
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new_history = self.revision_history()
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if revision_id is not None and new_history != []:
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new_history = new_history[:new_history.index(revision_id) + 1]
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rev = self.repository.get_revision(revision_id)
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new_history = rev.get_history(self.repository)[1:]
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destination.set_revision_history(new_history)
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def copy_content_into(self, destination, revision_id=None):
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"""Copy the content of self into destination.
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revision_id: if not None, the revision history in the new branch will
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be truncated to end with revision_id.
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self._synchronize_history(destination, revision_id)
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parent = self.get_parent()
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except errors.InaccessibleParent, e:
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mutter('parent was not accessible to copy: %s', e)
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destination.set_parent(parent)
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self.tags.merge_to(destination.tags)
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"""Check consistency of the branch.
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In particular this checks that revisions given in the revision-history
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do actually match up in the revision graph, and that they're all
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present in the repository.
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Callers will typically also want to check the repository.
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:return: A BranchCheckResult.
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mainline_parent_id = None
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last_revno, last_revision_id = self.last_revision_info()
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real_rev_history = list(self.repository.iter_reverse_revision_history(
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real_rev_history.reverse()
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if len(real_rev_history) != last_revno:
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raise errors.BzrCheckError('revno does not match len(mainline)'
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' %s != %s' % (last_revno, len(real_rev_history)))
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# TODO: We should probably also check that real_rev_history actually
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# matches self.revision_history()
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for revision_id in real_rev_history:
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revision = self.repository.get_revision(revision_id)
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except errors.NoSuchRevision, e:
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raise errors.BzrCheckError("mainline revision {%s} not in repository"
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# In general the first entry on the revision history has no parents.
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# But it's not illegal for it to have parents listed; this can happen
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# in imports from Arch when the parents weren't reachable.
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if mainline_parent_id is not None:
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if mainline_parent_id not in revision.parent_ids:
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raise errors.BzrCheckError("previous revision {%s} not listed among "
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% (mainline_parent_id, revision_id))
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mainline_parent_id = revision_id
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return BranchCheckResult(self)
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def _get_checkout_format(self):
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"""Return the most suitable metadir for a checkout of this branch.
791
Weaves are used if this branch's repository uses weaves.
793
if isinstance(self.bzrdir, bzrdir.BzrDirPreSplitOut):
794
from bzrlib.repofmt import weaverepo
795
format = bzrdir.BzrDirMetaFormat1()
796
format.repository_format = weaverepo.RepositoryFormat7()
798
format = self.repository.bzrdir.checkout_metadir()
799
format.set_branch_format(self._format)
802
def create_checkout(self, to_location, revision_id=None,
803
lightweight=False, accelerator_tree=None,
805
"""Create a checkout of a branch.
807
:param to_location: The url to produce the checkout at
808
:param revision_id: The revision to check out
809
:param lightweight: If True, produce a lightweight checkout, otherwise,
810
produce a bound branch (heavyweight checkout)
811
:param accelerator_tree: A tree which can be used for retrieving file
812
contents more quickly than the revision tree, i.e. a workingtree.
813
The revision tree will be used for cases where accelerator_tree's
814
content is different.
815
:param hardlink: If true, hard-link files from accelerator_tree,
817
:return: The tree of the created checkout
819
t = transport.get_transport(to_location)
822
format = self._get_checkout_format()
823
checkout = format.initialize_on_transport(t)
824
from_branch = BranchReferenceFormat().initialize(checkout, self)
826
format = self._get_checkout_format()
827
checkout_branch = bzrdir.BzrDir.create_branch_convenience(
828
to_location, force_new_tree=False, format=format)
829
checkout = checkout_branch.bzrdir
830
checkout_branch.bind(self)
831
# pull up to the specified revision_id to set the initial
832
# branch tip correctly, and seed it with history.
833
checkout_branch.pull(self, stop_revision=revision_id)
835
tree = checkout.create_workingtree(revision_id,
836
from_branch=from_branch,
837
accelerator_tree=accelerator_tree,
839
basis_tree = tree.basis_tree()
840
basis_tree.lock_read()
842
for path, file_id in basis_tree.iter_references():
843
reference_parent = self.reference_parent(file_id, path)
844
reference_parent.create_checkout(tree.abspath(path),
845
basis_tree.get_reference_revision(file_id, path),
852
def reconcile(self, thorough=True):
853
"""Make sure the data stored in this branch is consistent."""
854
from bzrlib.reconcile import BranchReconciler
855
reconciler = BranchReconciler(self, thorough=thorough)
856
reconciler.reconcile()
859
def reference_parent(self, file_id, path):
860
"""Return the parent branch for a tree-reference file_id
861
:param file_id: The file_id of the tree reference
862
:param path: The path of the file_id in the tree
863
:return: A branch associated with the file_id
865
# FIXME should provide multiple branches, based on config
866
return Branch.open(self.bzrdir.root_transport.clone(path).base)
868
def supports_tags(self):
869
return self._format.supports_tags()
871
def _check_if_descendant_or_diverged(self, revision_a, revision_b, graph,
873
"""Ensure that revision_b is a descendant of revision_a.
875
This is a helper function for update_revisions.
877
:raises: DivergedBranches if revision_b has diverged from revision_a.
878
:returns: True if revision_b is a descendant of revision_a.
880
relation = self._revision_relations(revision_a, revision_b, graph)
881
if relation == 'b_descends_from_a':
883
elif relation == 'diverged':
884
raise errors.DivergedBranches(self, other_branch)
885
elif relation == 'a_descends_from_b':
888
raise AssertionError("invalid relation: %r" % (relation,))
890
def _revision_relations(self, revision_a, revision_b, graph):
891
"""Determine the relationship between two revisions.
893
:returns: One of: 'a_descends_from_b', 'b_descends_from_a', 'diverged'
895
heads = graph.heads([revision_a, revision_b])
896
if heads == set([revision_b]):
897
return 'b_descends_from_a'
898
elif heads == set([revision_a, revision_b]):
899
# These branches have diverged
901
elif heads == set([revision_a]):
902
return 'a_descends_from_b'
904
raise AssertionError("invalid heads: %r" % (heads,))
907
class BranchFormat(object):
908
"""An encapsulation of the initialization and open routines for a format.
910
Formats provide three things:
911
* An initialization routine,
915
Formats are placed in an dict by their format string for reference
916
during branch opening. Its not required that these be instances, they
917
can be classes themselves with class methods - it simply depends on
918
whether state is needed for a given format or not.
920
Once a format is deprecated, just deprecate the initialize and open
921
methods on the format class. Do not deprecate the object, as the
922
object will be created every time regardless.
925
_default_format = None
926
"""The default format used for new branches."""
929
"""The known formats."""
931
def __eq__(self, other):
932
return self.__class__ is other.__class__
934
def __ne__(self, other):
935
return not (self == other)
938
def find_format(klass, a_bzrdir):
939
"""Return the format for the branch object in a_bzrdir."""
941
transport = a_bzrdir.get_branch_transport(None)
942
format_string = transport.get("format").read()
943
return klass._formats[format_string]
944
except errors.NoSuchFile:
945
raise errors.NotBranchError(path=transport.base)
947
raise errors.UnknownFormatError(format=format_string, kind='branch')
950
def get_default_format(klass):
951
"""Return the current default format."""
952
return klass._default_format
954
def get_reference(self, a_bzrdir):
955
"""Get the target reference of the branch in a_bzrdir.
957
format probing must have been completed before calling
958
this method - it is assumed that the format of the branch
959
in a_bzrdir is correct.
961
:param a_bzrdir: The bzrdir to get the branch data from.
962
:return: None if the branch is not a reference branch.
967
def set_reference(self, a_bzrdir, to_branch):
968
"""Set the target reference of the branch in a_bzrdir.
970
format probing must have been completed before calling
971
this method - it is assumed that the format of the branch
972
in a_bzrdir is correct.
974
:param a_bzrdir: The bzrdir to set the branch reference for.
975
:param to_branch: branch that the checkout is to reference
977
raise NotImplementedError(self.set_reference)
979
def get_format_string(self):
980
"""Return the ASCII format string that identifies this format."""
981
raise NotImplementedError(self.get_format_string)
983
def get_format_description(self):
984
"""Return the short format description for this format."""
985
raise NotImplementedError(self.get_format_description)
987
def _initialize_helper(self, a_bzrdir, utf8_files, lock_type='metadir',
989
"""Initialize a branch in a bzrdir, with specified files
991
:param a_bzrdir: The bzrdir to initialize the branch in
992
:param utf8_files: The files to create as a list of
993
(filename, content) tuples
994
:param set_format: If True, set the format with
995
self.get_format_string. (BzrBranch4 has its format set
997
:return: a branch in this format
999
mutter('creating branch %r in %s', self, a_bzrdir.transport.base)
1000
branch_transport = a_bzrdir.get_branch_transport(self)
1002
'metadir': ('lock', lockdir.LockDir),
1003
'branch4': ('branch-lock', lockable_files.TransportLock),
1005
lock_name, lock_class = lock_map[lock_type]
1006
control_files = lockable_files.LockableFiles(branch_transport,
1007
lock_name, lock_class)
1008
control_files.create_lock()
1009
control_files.lock_write()
1011
utf8_files += [('format', self.get_format_string())]
1013
for (filename, content) in utf8_files:
1014
branch_transport.put_bytes(
1016
mode=a_bzrdir._get_file_mode())
1018
control_files.unlock()
1019
return self.open(a_bzrdir, _found=True)
1021
def initialize(self, a_bzrdir):
1022
"""Create a branch of this format in a_bzrdir."""
1023
raise NotImplementedError(self.initialize)
1025
def is_supported(self):
1026
"""Is this format supported?
1028
Supported formats can be initialized and opened.
1029
Unsupported formats may not support initialization or committing or
1030
some other features depending on the reason for not being supported.
1034
def open(self, a_bzrdir, _found=False):
1035
"""Return the branch object for a_bzrdir
1037
_found is a private parameter, do not use it. It is used to indicate
1038
if format probing has already be done.
1040
raise NotImplementedError(self.open)
1043
def register_format(klass, format):
1044
klass._formats[format.get_format_string()] = format
1047
def set_default_format(klass, format):
1048
klass._default_format = format
1050
def supports_stacking(self):
1051
"""True if this format records a stacked-on branch."""
1055
def unregister_format(klass, format):
1056
del klass._formats[format.get_format_string()]
1059
return self.get_format_string().rstrip()
1061
def supports_tags(self):
1062
"""True if this format supports tags stored in the branch"""
1063
return False # by default
1066
class BranchHooks(Hooks):
1067
"""A dictionary mapping hook name to a list of callables for branch hooks.
1069
e.g. ['set_rh'] Is the list of items to be called when the
1070
set_revision_history function is invoked.
1074
"""Create the default hooks.
1076
These are all empty initially, because by default nothing should get
1079
Hooks.__init__(self)
1080
# Introduced in 0.15:
1081
# invoked whenever the revision history has been set
1082
# with set_revision_history. The api signature is
1083
# (branch, revision_history), and the branch will
1086
# Invoked after a branch is opened. The api signature is (branch).
1088
# invoked after a push operation completes.
1089
# the api signature is
1091
# containing the members
1092
# (source, local, master, old_revno, old_revid, new_revno, new_revid)
1093
# where local is the local target branch or None, master is the target
1094
# master branch, and the rest should be self explanatory. The source
1095
# is read locked and the target branches write locked. Source will
1096
# be the local low-latency branch.
1097
self['post_push'] = []
1098
# invoked after a pull operation completes.
1099
# the api signature is
1101
# containing the members
1102
# (source, local, master, old_revno, old_revid, new_revno, new_revid)
1103
# where local is the local branch or None, master is the target
1104
# master branch, and the rest should be self explanatory. The source
1105
# is read locked and the target branches write locked. The local
1106
# branch is the low-latency branch.
1107
self['post_pull'] = []
1108
# invoked before a commit operation takes place.
1109
# the api signature is
1110
# (local, master, old_revno, old_revid, future_revno, future_revid,
1111
# tree_delta, future_tree).
1112
# old_revid is NULL_REVISION for the first commit to a branch
1113
# tree_delta is a TreeDelta object describing changes from the basis
1114
# revision, hooks MUST NOT modify this delta
1115
# future_tree is an in-memory tree obtained from
1116
# CommitBuilder.revision_tree() and hooks MUST NOT modify this tree
1117
self['pre_commit'] = []
1118
# invoked after a commit operation completes.
1119
# the api signature is
1120
# (local, master, old_revno, old_revid, new_revno, new_revid)
1121
# old_revid is NULL_REVISION for the first commit to a branch.
1122
self['post_commit'] = []
1123
# invoked after a uncommit operation completes.
1124
# the api signature is
1125
# (local, master, old_revno, old_revid, new_revno, new_revid) where
1126
# local is the local branch or None, master is the target branch,
1127
# and an empty branch recieves new_revno of 0, new_revid of None.
1128
self['post_uncommit'] = []
1130
# Invoked before the tip of a branch changes.
1131
# the api signature is
1132
# (params) where params is a ChangeBranchTipParams with the members
1133
# (branch, old_revno, new_revno, old_revid, new_revid)
1134
self['pre_change_branch_tip'] = []
1136
# Invoked after the tip of a branch changes.
1137
# the api signature is
1138
# (params) where params is a ChangeBranchTipParams with the members
1139
# (branch, old_revno, new_revno, old_revid, new_revid)
1140
self['post_change_branch_tip'] = []
1142
# Invoked when a stacked branch activates its fallback locations and
1143
# allows the transformation of the url of said location.
1144
# the api signature is
1145
# (branch, url) where branch is the branch having its fallback
1146
# location activated and url is the url for the fallback location.
1147
# The hook should return a url.
1148
self['transform_fallback_location'] = []
1151
# install the default hooks into the Branch class.
1152
Branch.hooks = BranchHooks()
1155
class ChangeBranchTipParams(object):
1156
"""Object holding parameters passed to *_change_branch_tip hooks.
1158
There are 5 fields that hooks may wish to access:
1160
:ivar branch: the branch being changed
1161
:ivar old_revno: revision number before the change
1162
:ivar new_revno: revision number after the change
1163
:ivar old_revid: revision id before the change
1164
:ivar new_revid: revision id after the change
1166
The revid fields are strings. The revno fields are integers.
1169
def __init__(self, branch, old_revno, new_revno, old_revid, new_revid):
1170
"""Create a group of ChangeBranchTip parameters.
1172
:param branch: The branch being changed.
1173
:param old_revno: Revision number before the change.
1174
:param new_revno: Revision number after the change.
1175
:param old_revid: Tip revision id before the change.
1176
:param new_revid: Tip revision id after the change.
1178
self.branch = branch
1179
self.old_revno = old_revno
1180
self.new_revno = new_revno
1181
self.old_revid = old_revid
1182
self.new_revid = new_revid
1184
def __eq__(self, other):
1185
return self.__dict__ == other.__dict__
1188
return "<%s of %s from (%s, %s) to (%s, %s)>" % (
1189
self.__class__.__name__, self.branch,
1190
self.old_revno, self.old_revid, self.new_revno, self.new_revid)
1193
class BzrBranchFormat4(BranchFormat):
1194
"""Bzr branch format 4.
1197
- a revision-history file.
1198
- a branch-lock lock file [ to be shared with the bzrdir ]
1201
def get_format_description(self):
1202
"""See BranchFormat.get_format_description()."""
1203
return "Branch format 4"
1205
def initialize(self, a_bzrdir):
1206
"""Create a branch of this format in a_bzrdir."""
1207
utf8_files = [('revision-history', ''),
1208
('branch-name', ''),
1210
return self._initialize_helper(a_bzrdir, utf8_files,
1211
lock_type='branch4', set_format=False)
1214
super(BzrBranchFormat4, self).__init__()
1215
self._matchingbzrdir = bzrdir.BzrDirFormat6()
1217
def open(self, a_bzrdir, _found=False):
1218
"""Return the branch object for a_bzrdir
1220
_found is a private parameter, do not use it. It is used to indicate
1221
if format probing has already be done.
1224
# we are being called directly and must probe.
1225
raise NotImplementedError
1226
return BzrBranch(_format=self,
1227
_control_files=a_bzrdir._control_files,
1229
_repository=a_bzrdir.open_repository())
1232
return "Bazaar-NG branch format 4"
1235
class BranchFormatMetadir(BranchFormat):
1236
"""Common logic for meta-dir based branch formats."""
1238
def _branch_class(self):
1239
"""What class to instantiate on open calls."""
1240
raise NotImplementedError(self._branch_class)
1242
def open(self, a_bzrdir, _found=False):
1243
"""Return the branch object for a_bzrdir.
1245
_found is a private parameter, do not use it. It is used to indicate
1246
if format probing has already be done.
1249
format = BranchFormat.find_format(a_bzrdir)
1250
if format.__class__ != self.__class__:
1251
raise AssertionError("wrong format %r found for %r" %
1254
transport = a_bzrdir.get_branch_transport(None)
1255
control_files = lockable_files.LockableFiles(transport, 'lock',
1257
return self._branch_class()(_format=self,
1258
_control_files=control_files,
1260
_repository=a_bzrdir.find_repository())
1261
except errors.NoSuchFile:
1262
raise errors.NotBranchError(path=transport.base)
1265
super(BranchFormatMetadir, self).__init__()
1266
self._matchingbzrdir = bzrdir.BzrDirMetaFormat1()
1268
def supports_tags(self):
1272
class BzrBranchFormat5(BranchFormatMetadir):
1273
"""Bzr branch format 5.
1276
- a revision-history file.
1278
- a lock dir guarding the branch itself
1279
- all of this stored in a branch/ subdirectory
1280
- works with shared repositories.
1282
This format is new in bzr 0.8.
1285
def _branch_class(self):
1288
def get_format_string(self):
1289
"""See BranchFormat.get_format_string()."""
1290
return "Bazaar-NG branch format 5\n"
1292
def get_format_description(self):
1293
"""See BranchFormat.get_format_description()."""
1294
return "Branch format 5"
1296
def initialize(self, a_bzrdir):
1297
"""Create a branch of this format in a_bzrdir."""
1298
utf8_files = [('revision-history', ''),
1299
('branch-name', ''),
1301
return self._initialize_helper(a_bzrdir, utf8_files)
1303
def supports_tags(self):
1307
class BzrBranchFormat6(BranchFormatMetadir):
1308
"""Branch format with last-revision and tags.
1310
Unlike previous formats, this has no explicit revision history. Instead,
1311
this just stores the last-revision, and the left-hand history leading
1312
up to there is the history.
1314
This format was introduced in bzr 0.15
1315
and became the default in 0.91.
1318
def _branch_class(self):
1321
def get_format_string(self):
1322
"""See BranchFormat.get_format_string()."""
1323
return "Bazaar Branch Format 6 (bzr 0.15)\n"
1325
def get_format_description(self):
1326
"""See BranchFormat.get_format_description()."""
1327
return "Branch format 6"
1329
def initialize(self, a_bzrdir):
1330
"""Create a branch of this format in a_bzrdir."""
1331
utf8_files = [('last-revision', '0 null:\n'),
1332
('branch.conf', ''),
1335
return self._initialize_helper(a_bzrdir, utf8_files)
1338
class BzrBranchFormat7(BranchFormatMetadir):
1339
"""Branch format with last-revision, tags, and a stacked location pointer.
1341
The stacked location pointer is passed down to the repository and requires
1342
a repository format with supports_external_lookups = True.
1344
This format was introduced in bzr 1.6.
1347
def _branch_class(self):
1350
def get_format_string(self):
1351
"""See BranchFormat.get_format_string()."""
1352
return "Bazaar Branch Format 7 (needs bzr 1.6)\n"
1354
def get_format_description(self):
1355
"""See BranchFormat.get_format_description()."""
1356
return "Branch format 7"
1358
def initialize(self, a_bzrdir):
1359
"""Create a branch of this format in a_bzrdir."""
1360
utf8_files = [('last-revision', '0 null:\n'),
1361
('branch.conf', ''),
1364
return self._initialize_helper(a_bzrdir, utf8_files)
1367
super(BzrBranchFormat7, self).__init__()
1368
self._matchingbzrdir.repository_format = \
1369
RepositoryFormatKnitPack5RichRoot()
1371
def supports_stacking(self):
1375
class BranchReferenceFormat(BranchFormat):
1376
"""Bzr branch reference format.
1378
Branch references are used in implementing checkouts, they
1379
act as an alias to the real branch which is at some other url.
1386
def get_format_string(self):
1387
"""See BranchFormat.get_format_string()."""
1388
return "Bazaar-NG Branch Reference Format 1\n"
1390
def get_format_description(self):
1391
"""See BranchFormat.get_format_description()."""
1392
return "Checkout reference format 1"
1394
def get_reference(self, a_bzrdir):
1395
"""See BranchFormat.get_reference()."""
1396
transport = a_bzrdir.get_branch_transport(None)
1397
return transport.get('location').read()
1399
def set_reference(self, a_bzrdir, to_branch):
1400
"""See BranchFormat.set_reference()."""
1401
transport = a_bzrdir.get_branch_transport(None)
1402
location = transport.put_bytes('location', to_branch.base)
1404
def initialize(self, a_bzrdir, target_branch=None):
1405
"""Create a branch of this format in a_bzrdir."""
1406
if target_branch is None:
1407
# this format does not implement branch itself, thus the implicit
1408
# creation contract must see it as uninitializable
1409
raise errors.UninitializableFormat(self)
1410
mutter('creating branch reference in %s', a_bzrdir.transport.base)
1411
branch_transport = a_bzrdir.get_branch_transport(self)
1412
branch_transport.put_bytes('location',
1413
target_branch.bzrdir.root_transport.base)
1414
branch_transport.put_bytes('format', self.get_format_string())
1416
a_bzrdir, _found=True,
1417
possible_transports=[target_branch.bzrdir.root_transport])
1420
super(BranchReferenceFormat, self).__init__()
1421
self._matchingbzrdir = bzrdir.BzrDirMetaFormat1()
1423
def _make_reference_clone_function(format, a_branch):
1424
"""Create a clone() routine for a branch dynamically."""
1425
def clone(to_bzrdir, revision_id=None):
1426
"""See Branch.clone()."""
1427
return format.initialize(to_bzrdir, a_branch)
1428
# cannot obey revision_id limits when cloning a reference ...
1429
# FIXME RBC 20060210 either nuke revision_id for clone, or
1430
# emit some sort of warning/error to the caller ?!
1433
def open(self, a_bzrdir, _found=False, location=None,
1434
possible_transports=None):
1435
"""Return the branch that the branch reference in a_bzrdir points at.
1437
_found is a private parameter, do not use it. It is used to indicate
1438
if format probing has already be done.
1441
format = BranchFormat.find_format(a_bzrdir)
1442
if format.__class__ != self.__class__:
1443
raise AssertionError("wrong format %r found for %r" %
1445
if location is None:
1446
location = self.get_reference(a_bzrdir)
1447
real_bzrdir = bzrdir.BzrDir.open(
1448
location, possible_transports=possible_transports)
1449
result = real_bzrdir.open_branch()
1450
# this changes the behaviour of result.clone to create a new reference
1451
# rather than a copy of the content of the branch.
1452
# I did not use a proxy object because that needs much more extensive
1453
# testing, and we are only changing one behaviour at the moment.
1454
# If we decide to alter more behaviours - i.e. the implicit nickname
1455
# then this should be refactored to introduce a tested proxy branch
1456
# and a subclass of that for use in overriding clone() and ....
1458
result.clone = self._make_reference_clone_function(result)
1462
# formats which have no format string are not discoverable
1463
# and not independently creatable, so are not registered.
1464
__format5 = BzrBranchFormat5()
1465
__format6 = BzrBranchFormat6()
1466
__format7 = BzrBranchFormat7()
1467
BranchFormat.register_format(__format5)
1468
BranchFormat.register_format(BranchReferenceFormat())
1469
BranchFormat.register_format(__format6)
1470
BranchFormat.register_format(__format7)
1471
BranchFormat.set_default_format(__format6)
1472
_legacy_formats = [BzrBranchFormat4(),
1475
class BzrBranch(Branch):
1476
"""A branch stored in the actual filesystem.
1478
Note that it's "local" in the context of the filesystem; it doesn't
1479
really matter if it's on an nfs/smb/afs/coda/... share, as long as
1480
it's writable, and can be accessed via the normal filesystem API.
1482
:ivar _transport: Transport for file operations on this branch's
1483
control files, typically pointing to the .bzr/branch directory.
1484
:ivar repository: Repository for this branch.
1485
:ivar base: The url of the base directory for this branch; the one
1486
containing the .bzr directory.
1489
def __init__(self, _format=None,
1490
_control_files=None, a_bzrdir=None, _repository=None):
1491
"""Create new branch object at a particular location."""
1492
if a_bzrdir is None:
1493
raise ValueError('a_bzrdir must be supplied')
1495
self.bzrdir = a_bzrdir
1496
self._base = self.bzrdir.transport.clone('..').base
1497
# XXX: We should be able to just do
1498
# self.base = self.bzrdir.root_transport.base
1499
# but this does not quite work yet -- mbp 20080522
1500
self._format = _format
1501
if _control_files is None:
1502
raise ValueError('BzrBranch _control_files is None')
1503
self.control_files = _control_files
1504
self._transport = _control_files._transport
1505
self.repository = _repository
1506
Branch.__init__(self)
1509
return '%s(%r)' % (self.__class__.__name__, self.base)
1513
def _get_base(self):
1514
"""Returns the directory containing the control directory."""
1517
base = property(_get_base, doc="The URL for the root of this branch.")
1519
def is_locked(self):
1520
return self.control_files.is_locked()
1522
def lock_write(self, token=None):
1523
repo_token = self.repository.lock_write()
1525
token = self.control_files.lock_write(token=token)
1527
self.repository.unlock()
1531
def lock_read(self):
1532
self.repository.lock_read()
1534
self.control_files.lock_read()
1536
self.repository.unlock()
1540
# TODO: test for failed two phase locks. This is known broken.
1542
self.control_files.unlock()
1544
self.repository.unlock()
1545
if not self.control_files.is_locked():
1546
# we just released the lock
1547
self._clear_cached_state()
1549
def peek_lock_mode(self):
1550
if self.control_files._lock_count == 0:
1553
return self.control_files._lock_mode
1555
def get_physical_lock_status(self):
1556
return self.control_files.get_physical_lock_status()
1559
def print_file(self, file, revision_id):
1560
"""See Branch.print_file."""
1561
return self.repository.print_file(file, revision_id)
1563
def _write_revision_history(self, history):
1564
"""Factored out of set_revision_history.
1566
This performs the actual writing to disk.
1567
It is intended to be called by BzrBranch5.set_revision_history."""
1568
self._transport.put_bytes(
1569
'revision-history', '\n'.join(history),
1570
mode=self.bzrdir._get_file_mode())
1573
def set_revision_history(self, rev_history):
1574
"""See Branch.set_revision_history."""
1575
if 'evil' in debug.debug_flags:
1576
mutter_callsite(3, "set_revision_history scales with history.")
1577
check_not_reserved_id = _mod_revision.check_not_reserved_id
1578
for rev_id in rev_history:
1579
check_not_reserved_id(rev_id)
1580
if Branch.hooks['post_change_branch_tip']:
1581
# Don't calculate the last_revision_info() if there are no hooks
1583
old_revno, old_revid = self.last_revision_info()
1584
if len(rev_history) == 0:
1585
revid = _mod_revision.NULL_REVISION
1587
revid = rev_history[-1]
1588
self._run_pre_change_branch_tip_hooks(len(rev_history), revid)
1589
self._write_revision_history(rev_history)
1590
self._clear_cached_state()
1591
self._cache_revision_history(rev_history)
1592
for hook in Branch.hooks['set_rh']:
1593
hook(self, rev_history)
1594
if Branch.hooks['post_change_branch_tip']:
1595
self._run_post_change_branch_tip_hooks(old_revno, old_revid)
1597
def _run_pre_change_branch_tip_hooks(self, new_revno, new_revid):
1598
"""Run the pre_change_branch_tip hooks."""
1599
hooks = Branch.hooks['pre_change_branch_tip']
1602
old_revno, old_revid = self.last_revision_info()
1603
params = ChangeBranchTipParams(
1604
self, old_revno, new_revno, old_revid, new_revid)
1608
except errors.TipChangeRejected:
1611
exc_info = sys.exc_info()
1612
hook_name = Branch.hooks.get_hook_name(hook)
1613
raise errors.HookFailed(
1614
'pre_change_branch_tip', hook_name, exc_info)
1616
def _run_post_change_branch_tip_hooks(self, old_revno, old_revid):
1617
"""Run the post_change_branch_tip hooks."""
1618
hooks = Branch.hooks['post_change_branch_tip']
1621
new_revno, new_revid = self.last_revision_info()
1622
params = ChangeBranchTipParams(
1623
self, old_revno, new_revno, old_revid, new_revid)
1628
def set_last_revision_info(self, revno, revision_id):
1629
"""Set the last revision of this branch.
1631
The caller is responsible for checking that the revno is correct
1632
for this revision id.
1634
It may be possible to set the branch last revision to an id not
1635
present in the repository. However, branches can also be
1636
configured to check constraints on history, in which case this may not
1639
revision_id = _mod_revision.ensure_null(revision_id)
1640
# this old format stores the full history, but this api doesn't
1641
# provide it, so we must generate, and might as well check it's
1643
history = self._lefthand_history(revision_id)
1644
if len(history) != revno:
1645
raise AssertionError('%d != %d' % (len(history), revno))
1646
self.set_revision_history(history)
1648
def _gen_revision_history(self):
1649
history = self._transport.get_bytes('revision-history').split('\n')
1650
if history[-1:] == ['']:
1651
# There shouldn't be a trailing newline, but just in case.
1655
def _lefthand_history(self, revision_id, last_rev=None,
1657
if 'evil' in debug.debug_flags:
1658
mutter_callsite(4, "_lefthand_history scales with history.")
1659
# stop_revision must be a descendant of last_revision
1660
graph = self.repository.get_graph()
1661
if last_rev is not None:
1662
if not graph.is_ancestor(last_rev, revision_id):
1663
# our previous tip is not merged into stop_revision
1664
raise errors.DivergedBranches(self, other_branch)
1665
# make a new revision history from the graph
1666
parents_map = graph.get_parent_map([revision_id])
1667
if revision_id not in parents_map:
1668
raise errors.NoSuchRevision(self, revision_id)
1669
current_rev_id = revision_id
1671
check_not_reserved_id = _mod_revision.check_not_reserved_id
1672
# Do not include ghosts or graph origin in revision_history
1673
while (current_rev_id in parents_map and
1674
len(parents_map[current_rev_id]) > 0):
1675
check_not_reserved_id(current_rev_id)
1676
new_history.append(current_rev_id)
1677
current_rev_id = parents_map[current_rev_id][0]
1678
parents_map = graph.get_parent_map([current_rev_id])
1679
new_history.reverse()
1683
def generate_revision_history(self, revision_id, last_rev=None,
1685
"""Create a new revision history that will finish with revision_id.
1687
:param revision_id: the new tip to use.
1688
:param last_rev: The previous last_revision. If not None, then this
1689
must be a ancestory of revision_id, or DivergedBranches is raised.
1690
:param other_branch: The other branch that DivergedBranches should
1691
raise with respect to.
1693
self.set_revision_history(self._lefthand_history(revision_id,
1694
last_rev, other_branch))
1696
def basis_tree(self):
1697
"""See Branch.basis_tree."""
1698
return self.repository.revision_tree(self.last_revision())
1701
def pull(self, source, overwrite=False, stop_revision=None,
1702
_hook_master=None, run_hooks=True, possible_transports=None,
1703
_override_hook_target=None):
1706
:param _hook_master: Private parameter - set the branch to
1707
be supplied as the master to pull hooks.
1708
:param run_hooks: Private parameter - if false, this branch
1709
is being called because it's the master of the primary branch,
1710
so it should not run its hooks.
1711
:param _override_hook_target: Private parameter - set the branch to be
1712
supplied as the target_branch to pull hooks.
1714
result = PullResult()
1715
result.source_branch = source
1716
if _override_hook_target is None:
1717
result.target_branch = self
1719
result.target_branch = _override_hook_target
1722
# We assume that during 'pull' the local repository is closer than
1724
graph = self.repository.get_graph(source.repository)
1725
result.old_revno, result.old_revid = self.last_revision_info()
1726
self.update_revisions(source, stop_revision, overwrite=overwrite,
1728
result.tag_conflicts = source.tags.merge_to(self.tags, overwrite)
1729
result.new_revno, result.new_revid = self.last_revision_info()
1731
result.master_branch = _hook_master
1732
result.local_branch = result.target_branch
1734
result.master_branch = result.target_branch
1735
result.local_branch = None
1737
for hook in Branch.hooks['post_pull']:
1743
def _get_parent_location(self):
1744
_locs = ['parent', 'pull', 'x-pull']
1747
return self._transport.get_bytes(l).strip('\n')
1748
except errors.NoSuchFile:
1753
def push(self, target, overwrite=False, stop_revision=None,
1754
_override_hook_source_branch=None):
1757
This is the basic concrete implementation of push()
1759
:param _override_hook_source_branch: If specified, run
1760
the hooks passing this Branch as the source, rather than self.
1761
This is for use of RemoteBranch, where push is delegated to the
1762
underlying vfs-based Branch.
1764
# TODO: Public option to disable running hooks - should be trivial but
1766
return _run_with_write_locked_target(
1767
target, self._push_with_bound_branches, target, overwrite,
1769
_override_hook_source_branch=_override_hook_source_branch)
1771
def _push_with_bound_branches(self, target, overwrite,
1773
_override_hook_source_branch=None):
1774
"""Push from self into target, and into target's master if any.
1776
This is on the base BzrBranch class even though it doesn't support
1777
bound branches because the *target* might be bound.
1780
if _override_hook_source_branch:
1781
result.source_branch = _override_hook_source_branch
1782
for hook in Branch.hooks['post_push']:
1785
bound_location = target.get_bound_location()
1786
if bound_location and target.base != bound_location:
1787
# there is a master branch.
1789
# XXX: Why the second check? Is it even supported for a branch to
1790
# be bound to itself? -- mbp 20070507
1791
master_branch = target.get_master_branch()
1792
master_branch.lock_write()
1794
# push into the master from this branch.
1795
self._basic_push(master_branch, overwrite, stop_revision)
1796
# and push into the target branch from this. Note that we push from
1797
# this branch again, because its considered the highest bandwidth
1799
result = self._basic_push(target, overwrite, stop_revision)
1800
result.master_branch = master_branch
1801
result.local_branch = target
1805
master_branch.unlock()
1808
result = self._basic_push(target, overwrite, stop_revision)
1809
# TODO: Why set master_branch and local_branch if there's no
1810
# binding? Maybe cleaner to just leave them unset? -- mbp
1812
result.master_branch = target
1813
result.local_branch = None
1817
def _basic_push(self, target, overwrite, stop_revision):
1818
"""Basic implementation of push without bound branches or hooks.
1820
Must be called with self read locked and target write locked.
1822
result = PushResult()
1823
result.source_branch = self
1824
result.target_branch = target
1825
result.old_revno, result.old_revid = target.last_revision_info()
1826
if result.old_revid != self.last_revision():
1827
# We assume that during 'push' this repository is closer than
1829
graph = self.repository.get_graph(target.repository)
1830
target.update_revisions(self, stop_revision, overwrite=overwrite,
1832
if self._push_should_merge_tags():
1833
result.tag_conflicts = self.tags.merge_to(target.tags, overwrite)
1834
result.new_revno, result.new_revid = target.last_revision_info()
1837
def _push_should_merge_tags(self):
1838
"""Should _basic_push merge this branch's tags into the target?
1840
The default implementation returns False if this branch has no tags,
1841
and True the rest of the time. Subclasses may override this.
1843
return self.tags.supports_tags() and self.tags.get_tag_dict()
1845
def get_parent(self):
1846
"""See Branch.get_parent."""
1847
parent = self._get_parent_location()
1850
# This is an old-format absolute path to a local branch
1851
# turn it into a url
1852
if parent.startswith('/'):
1853
parent = urlutils.local_path_to_url(parent.decode('utf8'))
1855
return urlutils.join(self.base[:-1], parent)
1856
except errors.InvalidURLJoin, e:
1857
raise errors.InaccessibleParent(parent, self.base)
1859
def get_stacked_on_url(self):
1860
raise errors.UnstackableBranchFormat(self._format, self.base)
1862
def set_push_location(self, location):
1863
"""See Branch.set_push_location."""
1864
self.get_config().set_user_option(
1865
'push_location', location,
1866
store=_mod_config.STORE_LOCATION_NORECURSE)
1869
def set_parent(self, url):
1870
"""See Branch.set_parent."""
1871
# TODO: Maybe delete old location files?
1872
# URLs should never be unicode, even on the local fs,
1873
# FIXUP this and get_parent in a future branch format bump:
1874
# read and rewrite the file. RBC 20060125
1876
if isinstance(url, unicode):
1878
url = url.encode('ascii')
1879
except UnicodeEncodeError:
1880
raise errors.InvalidURL(url,
1881
"Urls must be 7-bit ascii, "
1882
"use bzrlib.urlutils.escape")
1883
url = urlutils.relative_url(self.base, url)
1884
self._set_parent_location(url)
1886
def _set_parent_location(self, url):
1888
self._transport.delete('parent')
1890
self._transport.put_bytes('parent', url + '\n',
1891
mode=self.bzrdir._get_file_mode())
1893
def set_stacked_on_url(self, url):
1894
raise errors.UnstackableBranchFormat(self._format, self.base)
1897
class BzrBranch5(BzrBranch):
1898
"""A format 5 branch. This supports new features over plain branches.
1900
It has support for a master_branch which is the data for bound branches.
1904
def pull(self, source, overwrite=False, stop_revision=None,
1905
run_hooks=True, possible_transports=None,
1906
_override_hook_target=None):
1907
"""Pull from source into self, updating my master if any.
1909
:param run_hooks: Private parameter - if false, this branch
1910
is being called because it's the master of the primary branch,
1911
so it should not run its hooks.
1913
bound_location = self.get_bound_location()
1914
master_branch = None
1915
if bound_location and source.base != bound_location:
1916
# not pulling from master, so we need to update master.
1917
master_branch = self.get_master_branch(possible_transports)
1918
master_branch.lock_write()
1921
# pull from source into master.
1922
master_branch.pull(source, overwrite, stop_revision,
1924
return super(BzrBranch5, self).pull(source, overwrite,
1925
stop_revision, _hook_master=master_branch,
1926
run_hooks=run_hooks,
1927
_override_hook_target=_override_hook_target)
1930
master_branch.unlock()
1932
def get_bound_location(self):
1934
return self._transport.get_bytes('bound')[:-1]
1935
except errors.NoSuchFile:
1939
def get_master_branch(self, possible_transports=None):
1940
"""Return the branch we are bound to.
1942
:return: Either a Branch, or None
1944
This could memoise the branch, but if thats done
1945
it must be revalidated on each new lock.
1946
So for now we just don't memoise it.
1947
# RBC 20060304 review this decision.
1949
bound_loc = self.get_bound_location()
1953
return Branch.open(bound_loc,
1954
possible_transports=possible_transports)
1955
except (errors.NotBranchError, errors.ConnectionError), e:
1956
raise errors.BoundBranchConnectionFailure(
1960
def set_bound_location(self, location):
1961
"""Set the target where this branch is bound to.
1963
:param location: URL to the target branch
1966
self._transport.put_bytes('bound', location+'\n',
1967
mode=self.bzrdir._get_file_mode())
1970
self._transport.delete('bound')
1971
except errors.NoSuchFile:
1976
def bind(self, other):
1977
"""Bind this branch to the branch other.
1979
This does not push or pull data between the branches, though it does
1980
check for divergence to raise an error when the branches are not
1981
either the same, or one a prefix of the other. That behaviour may not
1982
be useful, so that check may be removed in future.
1984
:param other: The branch to bind to
1987
# TODO: jam 20051230 Consider checking if the target is bound
1988
# It is debatable whether you should be able to bind to
1989
# a branch which is itself bound.
1990
# Committing is obviously forbidden,
1991
# but binding itself may not be.
1992
# Since we *have* to check at commit time, we don't
1993
# *need* to check here
1995
# we want to raise diverged if:
1996
# last_rev is not in the other_last_rev history, AND
1997
# other_last_rev is not in our history, and do it without pulling
1999
self.set_bound_location(other.base)
2003
"""If bound, unbind"""
2004
return self.set_bound_location(None)
2007
def update(self, possible_transports=None):
2008
"""Synchronise this branch with the master branch if any.
2010
:return: None or the last_revision that was pivoted out during the
2013
master = self.get_master_branch(possible_transports)
2014
if master is not None:
2015
old_tip = _mod_revision.ensure_null(self.last_revision())
2016
self.pull(master, overwrite=True)
2017
if self.repository.get_graph().is_ancestor(old_tip,
2018
_mod_revision.ensure_null(self.last_revision())):
2024
class BzrBranch7(BzrBranch5):
2025
"""A branch with support for a fallback repository."""
2027
def _get_fallback_repository(self, url):
2028
"""Get the repository we fallback to at url."""
2029
url = urlutils.join(self.base, url)
2030
return bzrdir.BzrDir.open(url).open_branch().repository
2032
def _activate_fallback_location(self, url):
2033
"""Activate the branch/repository from url as a fallback repository."""
2034
self.repository.add_fallback_repository(
2035
self._get_fallback_repository(url))
2037
def _open_hook(self):
2039
url = self.get_stacked_on_url()
2040
except (errors.UnstackableRepositoryFormat, errors.NotStacked,
2041
errors.UnstackableBranchFormat):
2044
for hook in Branch.hooks['transform_fallback_location']:
2045
url = hook(self, url)
2047
hook_name = Branch.hooks.get_hook_name(hook)
2048
raise AssertionError(
2049
"'transform_fallback_location' hook %s returned "
2050
"None, not a URL." % hook_name)
2051
self._activate_fallback_location(url)
2053
def _check_stackable_repo(self):
2054
if not self.repository._format.supports_external_lookups:
2055
raise errors.UnstackableRepositoryFormat(self.repository._format,
2056
self.repository.base)
2058
def __init__(self, *args, **kwargs):
2059
super(BzrBranch7, self).__init__(*args, **kwargs)
2060
self._last_revision_info_cache = None
2061
self._partial_revision_history_cache = []
2063
def _clear_cached_state(self):
2064
super(BzrBranch7, self)._clear_cached_state()
2065
self._last_revision_info_cache = None
2066
self._partial_revision_history_cache = []
2068
def _last_revision_info(self):
2069
revision_string = self._transport.get_bytes('last-revision')
2070
revno, revision_id = revision_string.rstrip('\n').split(' ', 1)
2071
revision_id = cache_utf8.get_cached_utf8(revision_id)
2073
return revno, revision_id
2075
def _write_last_revision_info(self, revno, revision_id):
2076
"""Simply write out the revision id, with no checks.
2078
Use set_last_revision_info to perform this safely.
2080
Does not update the revision_history cache.
2081
Intended to be called by set_last_revision_info and
2082
_write_revision_history.
2084
revision_id = _mod_revision.ensure_null(revision_id)
2085
out_string = '%d %s\n' % (revno, revision_id)
2086
self._transport.put_bytes('last-revision', out_string,
2087
mode=self.bzrdir._get_file_mode())
2090
def set_last_revision_info(self, revno, revision_id):
2091
revision_id = _mod_revision.ensure_null(revision_id)
2092
old_revno, old_revid = self.last_revision_info()
2093
if self._get_append_revisions_only():
2094
self._check_history_violation(revision_id)
2095
self._run_pre_change_branch_tip_hooks(revno, revision_id)
2096
self._write_last_revision_info(revno, revision_id)
2097
self._clear_cached_state()
2098
self._last_revision_info_cache = revno, revision_id
2099
self._run_post_change_branch_tip_hooks(old_revno, old_revid)
2101
def _check_history_violation(self, revision_id):
2102
last_revision = _mod_revision.ensure_null(self.last_revision())
2103
if _mod_revision.is_null(last_revision):
2105
if last_revision not in self._lefthand_history(revision_id):
2106
raise errors.AppendRevisionsOnlyViolation(self.base)
2108
def _gen_revision_history(self):
2109
"""Generate the revision history from last revision
2111
last_revno, last_revision = self.last_revision_info()
2112
self._extend_partial_history(stop_index=last_revno-1)
2113
return list(reversed(self._partial_revision_history_cache))
2115
def _extend_partial_history(self, stop_index=None, stop_revision=None):
2116
"""Extend the partial history to include a given index
2118
If a stop_index is supplied, stop when that index has been reached.
2119
If a stop_revision is supplied, stop when that revision is
2120
encountered. Otherwise, stop when the beginning of history is
2123
:param stop_index: The index which should be present. When it is
2124
present, history extension will stop.
2125
:param revision_id: The revision id which should be present. When
2126
it is encountered, history extension will stop.
2128
repo = self.repository
2129
if len(self._partial_revision_history_cache) == 0:
2130
iterator = repo.iter_reverse_revision_history(self.last_revision())
2132
start_revision = self._partial_revision_history_cache[-1]
2133
iterator = repo.iter_reverse_revision_history(start_revision)
2134
#skip the last revision in the list
2135
next_revision = iterator.next()
2136
for revision_id in iterator:
2137
self._partial_revision_history_cache.append(revision_id)
2138
if (stop_index is not None and
2139
len(self._partial_revision_history_cache) > stop_index):
2141
if revision_id == stop_revision:
2144
def _write_revision_history(self, history):
2145
"""Factored out of set_revision_history.
2147
This performs the actual writing to disk, with format-specific checks.
2148
It is intended to be called by BzrBranch5.set_revision_history.
2150
if len(history) == 0:
2151
last_revision = 'null:'
2153
if history != self._lefthand_history(history[-1]):
2154
raise errors.NotLefthandHistory(history)
2155
last_revision = history[-1]
2156
if self._get_append_revisions_only():
2157
self._check_history_violation(last_revision)
2158
self._write_last_revision_info(len(history), last_revision)
2161
def _set_parent_location(self, url):
2162
"""Set the parent branch"""
2163
self._set_config_location('parent_location', url, make_relative=True)
2166
def _get_parent_location(self):
2167
"""Set the parent branch"""
2168
return self._get_config_location('parent_location')
2170
def set_push_location(self, location):
2171
"""See Branch.set_push_location."""
2172
self._set_config_location('push_location', location)
2174
def set_bound_location(self, location):
2175
"""See Branch.set_push_location."""
2177
config = self.get_config()
2178
if location is None:
2179
if config.get_user_option('bound') != 'True':
2182
config.set_user_option('bound', 'False', warn_masked=True)
2185
self._set_config_location('bound_location', location,
2187
config.set_user_option('bound', 'True', warn_masked=True)
2190
def _get_bound_location(self, bound):
2191
"""Return the bound location in the config file.
2193
Return None if the bound parameter does not match"""
2194
config = self.get_config()
2195
config_bound = (config.get_user_option('bound') == 'True')
2196
if config_bound != bound:
2198
return self._get_config_location('bound_location', config=config)
2200
def get_bound_location(self):
2201
"""See Branch.set_push_location."""
2202
return self._get_bound_location(True)
2204
def get_old_bound_location(self):
2205
"""See Branch.get_old_bound_location"""
2206
return self._get_bound_location(False)
2208
def get_stacked_on_url(self):
2209
# you can always ask for the URL; but you might not be able to use it
2210
# if the repo can't support stacking.
2211
## self._check_stackable_repo()
2212
stacked_url = self._get_config_location('stacked_on_location')
2213
if stacked_url is None:
2214
raise errors.NotStacked(self)
2217
def set_append_revisions_only(self, enabled):
2222
self.get_config().set_user_option('append_revisions_only', value,
2225
def set_stacked_on_url(self, url):
2226
self._check_stackable_repo()
2229
old_url = self.get_stacked_on_url()
2230
except (errors.NotStacked, errors.UnstackableBranchFormat,
2231
errors.UnstackableRepositoryFormat):
2234
# repositories don't offer an interface to remove fallback
2235
# repositories today; take the conceptually simpler option and just
2237
self.repository = self.bzrdir.find_repository()
2238
# for every revision reference the branch has, ensure it is pulled
2240
source_repository = self._get_fallback_repository(old_url)
2241
for revision_id in chain([self.last_revision()],
2242
self.tags.get_reverse_tag_dict()):
2243
self.repository.fetch(source_repository, revision_id,
2246
self._activate_fallback_location(url)
2247
# write this out after the repository is stacked to avoid setting a
2248
# stacked config that doesn't work.
2249
self._set_config_location('stacked_on_location', url)
2251
def _get_append_revisions_only(self):
2252
value = self.get_config().get_user_option('append_revisions_only')
2253
return value == 'True'
2255
def _synchronize_history(self, destination, revision_id):
2256
"""Synchronize last revision and revision history between branches.
2258
This version is most efficient when the destination is also a
2259
BzrBranch6, but works for BzrBranch5, as long as the destination's
2260
repository contains all the lefthand ancestors of the intended
2261
last_revision. If not, set_last_revision_info will fail.
2263
:param destination: The branch to copy the history into
2264
:param revision_id: The revision-id to truncate history at. May
2265
be None to copy complete history.
2267
source_revno, source_revision_id = self.last_revision_info()
2268
if revision_id is None:
2269
revno, revision_id = source_revno, source_revision_id
2270
elif source_revision_id == revision_id:
2271
# we know the revno without needing to walk all of history
2272
revno = source_revno
2274
# To figure out the revno for a random revision, we need to build
2275
# the revision history, and count its length.
2276
# We don't care about the order, just how long it is.
2277
# Alternatively, we could start at the current location, and count
2278
# backwards. But there is no guarantee that we will find it since
2279
# it may be a merged revision.
2280
revno = len(list(self.repository.iter_reverse_revision_history(
2282
destination.set_last_revision_info(revno, revision_id)
2284
def _make_tags(self):
2285
return BasicTags(self)
2288
def generate_revision_history(self, revision_id, last_rev=None,
2290
"""See BzrBranch5.generate_revision_history"""
2291
history = self._lefthand_history(revision_id, last_rev, other_branch)
2292
revno = len(history)
2293
self.set_last_revision_info(revno, revision_id)
2296
def get_rev_id(self, revno, history=None):
2297
"""Find the revision id of the specified revno."""
2299
return _mod_revision.NULL_REVISION
2301
last_revno, last_revision_id = self.last_revision_info()
2302
if revno <= 0 or revno > last_revno:
2303
raise errors.NoSuchRevision(self, revno)
2305
if history is not None:
2306
return history[revno - 1]
2308
index = last_revno - revno
2309
if len(self._partial_revision_history_cache) <= index:
2310
self._extend_partial_history(stop_index=index)
2311
if len(self._partial_revision_history_cache) > index:
2312
return self._partial_revision_history_cache[index]
2314
raise errors.NoSuchRevision(self, revno)
2317
def revision_id_to_revno(self, revision_id):
2318
"""Given a revision id, return its revno"""
2319
if _mod_revision.is_null(revision_id):
2322
index = self._partial_revision_history_cache.index(revision_id)
2324
self._extend_partial_history(stop_revision=revision_id)
2325
index = len(self._partial_revision_history_cache) - 1
2326
if self._partial_revision_history_cache[index] != revision_id:
2327
raise errors.NoSuchRevision(self, revision_id)
2328
return self.revno() - index
2331
class BzrBranch6(BzrBranch7):
2332
"""See BzrBranchFormat6 for the capabilities of this branch.
2334
This subclass of BzrBranch7 disables the new features BzrBranch7 added,
2338
def get_stacked_on_url(self):
2339
raise errors.UnstackableBranchFormat(self._format, self.base)
2341
def set_stacked_on_url(self, url):
2342
raise errors.UnstackableBranchFormat(self._format, self.base)
2345
######################################################################
2346
# results of operations
2349
class _Result(object):
2351
def _show_tag_conficts(self, to_file):
2352
if not getattr(self, 'tag_conflicts', None):
2354
to_file.write('Conflicting tags:\n')
2355
for name, value1, value2 in self.tag_conflicts:
2356
to_file.write(' %s\n' % (name, ))
2359
class PullResult(_Result):
2360
"""Result of a Branch.pull operation.
2362
:ivar old_revno: Revision number before pull.
2363
:ivar new_revno: Revision number after pull.
2364
:ivar old_revid: Tip revision id before pull.
2365
:ivar new_revid: Tip revision id after pull.
2366
:ivar source_branch: Source (local) branch object.
2367
:ivar master_branch: Master branch of the target, or the target if no
2369
:ivar local_branch: target branch if there is a Master, else None
2370
:ivar target_branch: Target/destination branch object.
2371
:ivar tag_conflicts: A list of tag conflicts, see BasicTags.merge_to
2375
# DEPRECATED: pull used to return the change in revno
2376
return self.new_revno - self.old_revno
2378
def report(self, to_file):
2380
if self.old_revid == self.new_revid:
2381
to_file.write('No revisions to pull.\n')
2383
to_file.write('Now on revision %d.\n' % self.new_revno)
2384
self._show_tag_conficts(to_file)
2387
class PushResult(_Result):
2388
"""Result of a Branch.push operation.
2390
:ivar old_revno: Revision number before push.
2391
:ivar new_revno: Revision number after push.
2392
:ivar old_revid: Tip revision id before push.
2393
:ivar new_revid: Tip revision id after push.
2394
:ivar source_branch: Source branch object.
2395
:ivar master_branch: Master branch of the target, or None.
2396
:ivar target_branch: Target/destination branch object.
2400
# DEPRECATED: push used to return the change in revno
2401
return self.new_revno - self.old_revno
2403
def report(self, to_file):
2404
"""Write a human-readable description of the result."""
2405
if self.old_revid == self.new_revid:
2406
to_file.write('No new revisions to push.\n')
2408
to_file.write('Pushed up to revision %d.\n' % self.new_revno)
2409
self._show_tag_conficts(to_file)
2412
class BranchCheckResult(object):
2413
"""Results of checking branch consistency.
2418
def __init__(self, branch):
2419
self.branch = branch
2421
def report_results(self, verbose):
2422
"""Report the check results via trace.note.
2424
:param verbose: Requests more detailed display of what was checked,
2427
note('checked branch %s format %s',
2429
self.branch._format)
2432
class Converter5to6(object):
2433
"""Perform an in-place upgrade of format 5 to format 6"""
2435
def convert(self, branch):
2436
# Data for 5 and 6 can peacefully coexist.
2437
format = BzrBranchFormat6()
2438
new_branch = format.open(branch.bzrdir, _found=True)
2440
# Copy source data into target
2441
new_branch._write_last_revision_info(*branch.last_revision_info())
2442
new_branch.set_parent(branch.get_parent())
2443
new_branch.set_bound_location(branch.get_bound_location())
2444
new_branch.set_push_location(branch.get_push_location())
2446
# New branch has no tags by default
2447
new_branch.tags._set_tag_dict({})
2449
# Copying done; now update target format
2450
new_branch._transport.put_bytes('format',
2451
format.get_format_string(),
2452
mode=new_branch.bzrdir._get_file_mode())
2454
# Clean up old files
2455
new_branch._transport.delete('revision-history')
2457
branch.set_parent(None)
2458
except errors.NoSuchFile:
2460
branch.set_bound_location(None)
2463
class Converter6to7(object):
2464
"""Perform an in-place upgrade of format 6 to format 7"""
2466
def convert(self, branch):
2467
format = BzrBranchFormat7()
2468
branch._set_config_location('stacked_on_location', '')
2469
# update target format
2470
branch._transport.put_bytes('format', format.get_format_string())
2474
def _run_with_write_locked_target(target, callable, *args, **kwargs):
2475
"""Run ``callable(*args, **kwargs)``, write-locking target for the
2478
_run_with_write_locked_target will attempt to release the lock it acquires.
2480
If an exception is raised by callable, then that exception *will* be
2481
propagated, even if the unlock attempt raises its own error. Thus
2482
_run_with_write_locked_target should be preferred to simply doing::
2486
return callable(*args, **kwargs)
2491
# This is very similar to bzrlib.decorators.needs_write_lock. Perhaps they
2492
# should share code?
2495
result = callable(*args, **kwargs)
2497
exc_info = sys.exc_info()
2501
raise exc_info[0], exc_info[1], exc_info[2]
added
removed
bzrlib/branch.py
