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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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return self.get_config().get_nickname()
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def _set_nick(self, nick):
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self.get_config().set_user_option('nickname', nick, warn_masked=True)
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nick = property(_get_nick, _set_nick)
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raise NotImplementedError(self.is_locked)
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def lock_write(self):
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raise NotImplementedError(self.lock_write)
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raise NotImplementedError(self.lock_read)
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raise NotImplementedError(self.unlock)
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def peek_lock_mode(self):
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"""Return lock mode for the Branch: 'r', 'w' or None"""
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raise NotImplementedError(self.peek_lock_mode)
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def get_physical_lock_status(self):
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raise NotImplementedError(self.get_physical_lock_status)
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def get_revision_id_to_revno_map(self):
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"""Return the revision_id => dotted revno map.
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This will be regenerated on demand, but will be cached.
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:return: A dictionary mapping revision_id => dotted revno.
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This dictionary should not be modified by the caller.
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if self._revision_id_to_revno_cache is not None:
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mapping = self._revision_id_to_revno_cache
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mapping = self._gen_revno_map()
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self._cache_revision_id_to_revno(mapping)
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# TODO: jam 20070417 Since this is being cached, should we be returning
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# I would rather not, and instead just declare that users should not
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# modify the return value.
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def _gen_revno_map(self):
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"""Create a new mapping from revision ids to dotted revnos.
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Dotted revnos are generated based on the current tip in the revision
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This is the worker function for get_revision_id_to_revno_map, which
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just caches the return value.
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:return: A dictionary mapping revision_id => dotted revno.
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last_revision = self.last_revision()
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revision_graph = repository._old_get_graph(self.repository,
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merge_sorted_revisions = tsort.merge_sort(
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revision_id_to_revno = dict((rev_id, revno)
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for seq_num, rev_id, depth, revno, end_of_merge
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in merge_sorted_revisions)
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return revision_id_to_revno
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def leave_lock_in_place(self):
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"""Tell this branch object not to release the physical lock when this
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If lock_write doesn't return a token, then this method is not supported.
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self.control_files.leave_in_place()
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def dont_leave_lock_in_place(self):
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"""Tell this branch object to release the physical lock when this
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object is unlocked, even if it didn't originally acquire it.
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If lock_write doesn't return a token, then this method is not supported.
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self.control_files.dont_leave_in_place()
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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.
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Weaves are used if this branch's repository uses weaves.
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if isinstance(self.bzrdir, bzrdir.BzrDirPreSplitOut):
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from bzrlib.repofmt import weaverepo
783
format = bzrdir.BzrDirMetaFormat1()
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format.repository_format = weaverepo.RepositoryFormat7()
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format = self.repository.bzrdir.checkout_metadir()
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format.set_branch_format(self._format)
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def create_checkout(self, to_location, revision_id=None,
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lightweight=False, accelerator_tree=None,
793
"""Create a checkout of a branch.
795
:param to_location: The url to produce the checkout at
796
:param revision_id: The revision to check out
797
:param lightweight: If True, produce a lightweight checkout, otherwise,
798
produce a bound branch (heavyweight checkout)
799
:param accelerator_tree: A tree which can be used for retrieving file
800
contents more quickly than the revision tree, i.e. a workingtree.
801
The revision tree will be used for cases where accelerator_tree's
802
content is different.
803
:param hardlink: If true, hard-link files from accelerator_tree,
805
:return: The tree of the created checkout
807
t = transport.get_transport(to_location)
810
format = self._get_checkout_format()
811
checkout = format.initialize_on_transport(t)
812
from_branch = BranchReferenceFormat().initialize(checkout, self)
814
format = self._get_checkout_format()
815
checkout_branch = bzrdir.BzrDir.create_branch_convenience(
816
to_location, force_new_tree=False, format=format)
817
checkout = checkout_branch.bzrdir
818
checkout_branch.bind(self)
819
# pull up to the specified revision_id to set the initial
820
# branch tip correctly, and seed it with history.
821
checkout_branch.pull(self, stop_revision=revision_id)
823
tree = checkout.create_workingtree(revision_id,
824
from_branch=from_branch,
825
accelerator_tree=accelerator_tree,
827
basis_tree = tree.basis_tree()
828
basis_tree.lock_read()
830
for path, file_id in basis_tree.iter_references():
831
reference_parent = self.reference_parent(file_id, path)
832
reference_parent.create_checkout(tree.abspath(path),
833
basis_tree.get_reference_revision(file_id, path),
840
def reconcile(self, thorough=True):
841
"""Make sure the data stored in this branch is consistent."""
842
from bzrlib.reconcile import BranchReconciler
843
reconciler = BranchReconciler(self, thorough=thorough)
844
reconciler.reconcile()
847
def reference_parent(self, file_id, path):
848
"""Return the parent branch for a tree-reference file_id
849
:param file_id: The file_id of the tree reference
850
:param path: The path of the file_id in the tree
851
:return: A branch associated with the file_id
853
# FIXME should provide multiple branches, based on config
854
return Branch.open(self.bzrdir.root_transport.clone(path).base)
856
def supports_tags(self):
857
return self._format.supports_tags()
859
def _check_if_descendant_or_diverged(self, revision_a, revision_b, graph,
861
"""Ensure that revision_b is a descendant of revision_a.
863
This is a helper function for update_revisions.
865
:raises: DivergedBranches if revision_b has diverged from revision_a.
866
:returns: True if revision_b is a descendant of revision_a.
868
relation = self._revision_relations(revision_a, revision_b, graph)
869
if relation == 'b_descends_from_a':
871
elif relation == 'diverged':
872
raise errors.DivergedBranches(self, other_branch)
873
elif relation == 'a_descends_from_b':
876
raise AssertionError("invalid relation: %r" % (relation,))
878
def _revision_relations(self, revision_a, revision_b, graph):
879
"""Determine the relationship between two revisions.
881
:returns: One of: 'a_descends_from_b', 'b_descends_from_a', 'diverged'
883
heads = graph.heads([revision_a, revision_b])
884
if heads == set([revision_b]):
885
return 'b_descends_from_a'
886
elif heads == set([revision_a, revision_b]):
887
# These branches have diverged
889
elif heads == set([revision_a]):
890
return 'a_descends_from_b'
892
raise AssertionError("invalid heads: %r" % (heads,))
895
class BranchFormat(object):
896
"""An encapsulation of the initialization and open routines for a format.
898
Formats provide three things:
899
* An initialization routine,
903
Formats are placed in an dict by their format string for reference
904
during branch opening. Its not required that these be instances, they
905
can be classes themselves with class methods - it simply depends on
906
whether state is needed for a given format or not.
908
Once a format is deprecated, just deprecate the initialize and open
909
methods on the format class. Do not deprecate the object, as the
910
object will be created every time regardless.
913
_default_format = None
914
"""The default format used for new branches."""
917
"""The known formats."""
919
def __eq__(self, other):
920
return self.__class__ is other.__class__
922
def __ne__(self, other):
923
return not (self == other)
926
def find_format(klass, a_bzrdir):
927
"""Return the format for the branch object in a_bzrdir."""
929
transport = a_bzrdir.get_branch_transport(None)
930
format_string = transport.get("format").read()
931
return klass._formats[format_string]
932
except errors.NoSuchFile:
933
raise errors.NotBranchError(path=transport.base)
935
raise errors.UnknownFormatError(format=format_string, kind='branch')
938
def get_default_format(klass):
939
"""Return the current default format."""
940
return klass._default_format
942
def get_reference(self, a_bzrdir):
943
"""Get the target reference of the branch in a_bzrdir.
945
format probing must have been completed before calling
946
this method - it is assumed that the format of the branch
947
in a_bzrdir is correct.
949
:param a_bzrdir: The bzrdir to get the branch data from.
950
:return: None if the branch is not a reference branch.
955
def set_reference(self, a_bzrdir, to_branch):
956
"""Set the target reference of the branch in a_bzrdir.
958
format probing must have been completed before calling
959
this method - it is assumed that the format of the branch
960
in a_bzrdir is correct.
962
:param a_bzrdir: The bzrdir to set the branch reference for.
963
:param to_branch: branch that the checkout is to reference
965
raise NotImplementedError(self.set_reference)
967
def get_format_string(self):
968
"""Return the ASCII format string that identifies this format."""
969
raise NotImplementedError(self.get_format_string)
971
def get_format_description(self):
972
"""Return the short format description for this format."""
973
raise NotImplementedError(self.get_format_description)
975
def _initialize_helper(self, a_bzrdir, utf8_files, lock_type='metadir',
977
"""Initialize a branch in a bzrdir, with specified files
979
:param a_bzrdir: The bzrdir to initialize the branch in
980
:param utf8_files: The files to create as a list of
981
(filename, content) tuples
982
:param set_format: If True, set the format with
983
self.get_format_string. (BzrBranch4 has its format set
985
:return: a branch in this format
987
mutter('creating branch %r in %s', self, a_bzrdir.transport.base)
988
branch_transport = a_bzrdir.get_branch_transport(self)
990
'metadir': ('lock', lockdir.LockDir),
991
'branch4': ('branch-lock', lockable_files.TransportLock),
993
lock_name, lock_class = lock_map[lock_type]
994
control_files = lockable_files.LockableFiles(branch_transport,
995
lock_name, lock_class)
996
control_files.create_lock()
997
control_files.lock_write()
999
utf8_files += [('format', self.get_format_string())]
1001
for (filename, content) in utf8_files:
1002
branch_transport.put_bytes(
1004
mode=a_bzrdir._get_file_mode())
1006
control_files.unlock()
1007
return self.open(a_bzrdir, _found=True)
1009
def initialize(self, a_bzrdir):
1010
"""Create a branch of this format in a_bzrdir."""
1011
raise NotImplementedError(self.initialize)
1013
def is_supported(self):
1014
"""Is this format supported?
1016
Supported formats can be initialized and opened.
1017
Unsupported formats may not support initialization or committing or
1018
some other features depending on the reason for not being supported.
1022
def open(self, a_bzrdir, _found=False):
1023
"""Return the branch object for a_bzrdir
1025
_found is a private parameter, do not use it. It is used to indicate
1026
if format probing has already be done.
1028
raise NotImplementedError(self.open)
1031
def register_format(klass, format):
1032
klass._formats[format.get_format_string()] = format
1035
def set_default_format(klass, format):
1036
klass._default_format = format
1038
def supports_stacking(self):
1039
"""True if this format records a stacked-on branch."""
1043
def unregister_format(klass, format):
1044
del klass._formats[format.get_format_string()]
1047
return self.get_format_string().rstrip()
1049
def supports_tags(self):
1050
"""True if this format supports tags stored in the branch"""
1051
return False # by default
1054
class BranchHooks(Hooks):
1055
"""A dictionary mapping hook name to a list of callables for branch hooks.
1057
e.g. ['set_rh'] Is the list of items to be called when the
1058
set_revision_history function is invoked.
1062
"""Create the default hooks.
1064
These are all empty initially, because by default nothing should get
1067
Hooks.__init__(self)
1068
# Introduced in 0.15:
1069
# invoked whenever the revision history has been set
1070
# with set_revision_history. The api signature is
1071
# (branch, revision_history), and the branch will
1074
# Invoked after a branch is opened. The api signature is (branch).
1076
# invoked after a push operation completes.
1077
# the api signature is
1079
# containing the members
1080
# (source, local, master, old_revno, old_revid, new_revno, new_revid)
1081
# where local is the local target branch or None, master is the target
1082
# master branch, and the rest should be self explanatory. The source
1083
# is read locked and the target branches write locked. Source will
1084
# be the local low-latency branch.
1085
self['post_push'] = []
1086
# invoked after a pull operation completes.
1087
# the api signature is
1089
# containing the members
1090
# (source, local, master, old_revno, old_revid, new_revno, new_revid)
1091
# where local is the local branch or None, master is the target
1092
# master branch, and the rest should be self explanatory. The source
1093
# is read locked and the target branches write locked. The local
1094
# branch is the low-latency branch.
1095
self['post_pull'] = []
1096
# invoked before a commit operation takes place.
1097
# the api signature is
1098
# (local, master, old_revno, old_revid, future_revno, future_revid,
1099
# tree_delta, future_tree).
1100
# old_revid is NULL_REVISION for the first commit to a branch
1101
# tree_delta is a TreeDelta object describing changes from the basis
1102
# revision, hooks MUST NOT modify this delta
1103
# future_tree is an in-memory tree obtained from
1104
# CommitBuilder.revision_tree() and hooks MUST NOT modify this tree
1105
self['pre_commit'] = []
1106
# invoked after a commit operation completes.
1107
# the api signature is
1108
# (local, master, old_revno, old_revid, new_revno, new_revid)
1109
# old_revid is NULL_REVISION for the first commit to a branch.
1110
self['post_commit'] = []
1111
# invoked after a uncommit operation completes.
1112
# the api signature is
1113
# (local, master, old_revno, old_revid, new_revno, new_revid) where
1114
# local is the local branch or None, master is the target branch,
1115
# and an empty branch recieves new_revno of 0, new_revid of None.
1116
self['post_uncommit'] = []
1118
# Invoked before the tip of a branch changes.
1119
# the api signature is
1120
# (params) where params is a ChangeBranchTipParams with the members
1121
# (branch, old_revno, new_revno, old_revid, new_revid)
1122
self['pre_change_branch_tip'] = []
1124
# Invoked after the tip of a branch changes.
1125
# the api signature is
1126
# (params) where params is a ChangeBranchTipParams with the members
1127
# (branch, old_revno, new_revno, old_revid, new_revid)
1128
self['post_change_branch_tip'] = []
1131
# install the default hooks into the Branch class.
1132
Branch.hooks = BranchHooks()
1135
class ChangeBranchTipParams(object):
1136
"""Object holding parameters passed to *_change_branch_tip hooks.
1138
There are 5 fields that hooks may wish to access:
1140
:ivar branch: the branch being changed
1141
:ivar old_revno: revision number before the change
1142
:ivar new_revno: revision number after the change
1143
:ivar old_revid: revision id before the change
1144
:ivar new_revid: revision id after the change
1146
The revid fields are strings. The revno fields are integers.
1149
def __init__(self, branch, old_revno, new_revno, old_revid, new_revid):
1150
"""Create a group of ChangeBranchTip parameters.
1152
:param branch: The branch being changed.
1153
:param old_revno: Revision number before the change.
1154
:param new_revno: Revision number after the change.
1155
:param old_revid: Tip revision id before the change.
1156
:param new_revid: Tip revision id after the change.
1158
self.branch = branch
1159
self.old_revno = old_revno
1160
self.new_revno = new_revno
1161
self.old_revid = old_revid
1162
self.new_revid = new_revid
1164
def __eq__(self, other):
1165
return self.__dict__ == other.__dict__
1168
return "<%s of %s from (%s, %s) to (%s, %s)>" % (
1169
self.__class__.__name__, self.branch,
1170
self.old_revno, self.old_revid, self.new_revno, self.new_revid)
1173
class BzrBranchFormat4(BranchFormat):
1174
"""Bzr branch format 4.
1177
- a revision-history file.
1178
- a branch-lock lock file [ to be shared with the bzrdir ]
1181
def get_format_description(self):
1182
"""See BranchFormat.get_format_description()."""
1183
return "Branch format 4"
1185
def initialize(self, a_bzrdir):
1186
"""Create a branch of this format in a_bzrdir."""
1187
utf8_files = [('revision-history', ''),
1188
('branch-name', ''),
1190
return self._initialize_helper(a_bzrdir, utf8_files,
1191
lock_type='branch4', set_format=False)
1194
super(BzrBranchFormat4, self).__init__()
1195
self._matchingbzrdir = bzrdir.BzrDirFormat6()
1197
def open(self, a_bzrdir, _found=False):
1198
"""Return the branch object for a_bzrdir
1200
_found is a private parameter, do not use it. It is used to indicate
1201
if format probing has already be done.
1204
# we are being called directly and must probe.
1205
raise NotImplementedError
1206
return BzrBranch(_format=self,
1207
_control_files=a_bzrdir._control_files,
1209
_repository=a_bzrdir.open_repository())
1212
return "Bazaar-NG branch format 4"
1215
class BranchFormatMetadir(BranchFormat):
1216
"""Common logic for meta-dir based branch formats."""
1218
def _branch_class(self):
1219
"""What class to instantiate on open calls."""
1220
raise NotImplementedError(self._branch_class)
1222
def open(self, a_bzrdir, _found=False):
1223
"""Return the branch object for a_bzrdir.
1225
_found is a private parameter, do not use it. It is used to indicate
1226
if format probing has already be done.
1229
format = BranchFormat.find_format(a_bzrdir)
1230
if format.__class__ != self.__class__:
1231
raise AssertionError("wrong format %r found for %r" %
1234
transport = a_bzrdir.get_branch_transport(None)
1235
control_files = lockable_files.LockableFiles(transport, 'lock',
1237
return self._branch_class()(_format=self,
1238
_control_files=control_files,
1240
_repository=a_bzrdir.find_repository())
1241
except errors.NoSuchFile:
1242
raise errors.NotBranchError(path=transport.base)
1245
super(BranchFormatMetadir, self).__init__()
1246
self._matchingbzrdir = bzrdir.BzrDirMetaFormat1()
1248
def supports_tags(self):
1252
class BzrBranchFormat5(BranchFormatMetadir):
1253
"""Bzr branch format 5.
1256
- a revision-history file.
1258
- a lock dir guarding the branch itself
1259
- all of this stored in a branch/ subdirectory
1260
- works with shared repositories.
1262
This format is new in bzr 0.8.
1265
def _branch_class(self):
1268
def get_format_string(self):
1269
"""See BranchFormat.get_format_string()."""
1270
return "Bazaar-NG branch format 5\n"
1272
def get_format_description(self):
1273
"""See BranchFormat.get_format_description()."""
1274
return "Branch format 5"
1276
def initialize(self, a_bzrdir):
1277
"""Create a branch of this format in a_bzrdir."""
1278
utf8_files = [('revision-history', ''),
1279
('branch-name', ''),
1281
return self._initialize_helper(a_bzrdir, utf8_files)
1283
def supports_tags(self):
1287
class BzrBranchFormat6(BranchFormatMetadir):
1288
"""Branch format with last-revision and tags.
1290
Unlike previous formats, this has no explicit revision history. Instead,
1291
this just stores the last-revision, and the left-hand history leading
1292
up to there is the history.
1294
This format was introduced in bzr 0.15
1295
and became the default in 0.91.
1298
def _branch_class(self):
1301
def get_format_string(self):
1302
"""See BranchFormat.get_format_string()."""
1303
return "Bazaar Branch Format 6 (bzr 0.15)\n"
1305
def get_format_description(self):
1306
"""See BranchFormat.get_format_description()."""
1307
return "Branch format 6"
1309
def initialize(self, a_bzrdir):
1310
"""Create a branch of this format in a_bzrdir."""
1311
utf8_files = [('last-revision', '0 null:\n'),
1312
('branch.conf', ''),
1315
return self._initialize_helper(a_bzrdir, utf8_files)
1318
class BzrBranchFormat7(BranchFormatMetadir):
1319
"""Branch format with last-revision, tags, and a stacked location pointer.
1321
The stacked location pointer is passed down to the repository and requires
1322
a repository format with supports_external_lookups = True.
1324
This format was introduced in bzr 1.6.
1327
def _branch_class(self):
1330
def get_format_string(self):
1331
"""See BranchFormat.get_format_string()."""
1332
return "Bazaar Branch Format 7 (needs bzr 1.6)\n"
1334
def get_format_description(self):
1335
"""See BranchFormat.get_format_description()."""
1336
return "Branch format 7"
1338
def initialize(self, a_bzrdir):
1339
"""Create a branch of this format in a_bzrdir."""
1340
utf8_files = [('last-revision', '0 null:\n'),
1341
('branch.conf', ''),
1344
return self._initialize_helper(a_bzrdir, utf8_files)
1347
super(BzrBranchFormat7, self).__init__()
1348
self._matchingbzrdir.repository_format = \
1349
RepositoryFormatKnitPack5RichRoot()
1351
def supports_stacking(self):
1355
class BranchReferenceFormat(BranchFormat):
1356
"""Bzr branch reference format.
1358
Branch references are used in implementing checkouts, they
1359
act as an alias to the real branch which is at some other url.
1366
def get_format_string(self):
1367
"""See BranchFormat.get_format_string()."""
1368
return "Bazaar-NG Branch Reference Format 1\n"
1370
def get_format_description(self):
1371
"""See BranchFormat.get_format_description()."""
1372
return "Checkout reference format 1"
1374
def get_reference(self, a_bzrdir):
1375
"""See BranchFormat.get_reference()."""
1376
transport = a_bzrdir.get_branch_transport(None)
1377
return transport.get('location').read()
1379
def set_reference(self, a_bzrdir, to_branch):
1380
"""See BranchFormat.set_reference()."""
1381
transport = a_bzrdir.get_branch_transport(None)
1382
location = transport.put_bytes('location', to_branch.base)
1384
def initialize(self, a_bzrdir, target_branch=None):
1385
"""Create a branch of this format in a_bzrdir."""
1386
if target_branch is None:
1387
# this format does not implement branch itself, thus the implicit
1388
# creation contract must see it as uninitializable
1389
raise errors.UninitializableFormat(self)
1390
mutter('creating branch reference in %s', a_bzrdir.transport.base)
1391
branch_transport = a_bzrdir.get_branch_transport(self)
1392
branch_transport.put_bytes('location',
1393
target_branch.bzrdir.root_transport.base)
1394
branch_transport.put_bytes('format', self.get_format_string())
1396
a_bzrdir, _found=True,
1397
possible_transports=[target_branch.bzrdir.root_transport])
1400
super(BranchReferenceFormat, self).__init__()
1401
self._matchingbzrdir = bzrdir.BzrDirMetaFormat1()
1403
def _make_reference_clone_function(format, a_branch):
1404
"""Create a clone() routine for a branch dynamically."""
1405
def clone(to_bzrdir, revision_id=None):
1406
"""See Branch.clone()."""
1407
return format.initialize(to_bzrdir, a_branch)
1408
# cannot obey revision_id limits when cloning a reference ...
1409
# FIXME RBC 20060210 either nuke revision_id for clone, or
1410
# emit some sort of warning/error to the caller ?!
1413
def open(self, a_bzrdir, _found=False, location=None,
1414
possible_transports=None):
1415
"""Return the branch that the branch reference in a_bzrdir points at.
1417
_found is a private parameter, do not use it. It is used to indicate
1418
if format probing has already be done.
1421
format = BranchFormat.find_format(a_bzrdir)
1422
if format.__class__ != self.__class__:
1423
raise AssertionError("wrong format %r found for %r" %
1425
if location is None:
1426
location = self.get_reference(a_bzrdir)
1427
real_bzrdir = bzrdir.BzrDir.open(
1428
location, possible_transports=possible_transports)
1429
result = real_bzrdir.open_branch()
1430
# this changes the behaviour of result.clone to create a new reference
1431
# rather than a copy of the content of the branch.
1432
# I did not use a proxy object because that needs much more extensive
1433
# testing, and we are only changing one behaviour at the moment.
1434
# If we decide to alter more behaviours - i.e. the implicit nickname
1435
# then this should be refactored to introduce a tested proxy branch
1436
# and a subclass of that for use in overriding clone() and ....
1438
result.clone = self._make_reference_clone_function(result)
1442
# formats which have no format string are not discoverable
1443
# and not independently creatable, so are not registered.
1444
__format5 = BzrBranchFormat5()
1445
__format6 = BzrBranchFormat6()
1446
__format7 = BzrBranchFormat7()
1447
BranchFormat.register_format(__format5)
1448
BranchFormat.register_format(BranchReferenceFormat())
1449
BranchFormat.register_format(__format6)
1450
BranchFormat.register_format(__format7)
1451
BranchFormat.set_default_format(__format6)
1452
_legacy_formats = [BzrBranchFormat4(),
1455
class BzrBranch(Branch):
1456
"""A branch stored in the actual filesystem.
1458
Note that it's "local" in the context of the filesystem; it doesn't
1459
really matter if it's on an nfs/smb/afs/coda/... share, as long as
1460
it's writable, and can be accessed via the normal filesystem API.
1462
:ivar _transport: Transport for file operations on this branch's
1463
control files, typically pointing to the .bzr/branch directory.
1464
:ivar repository: Repository for this branch.
1465
:ivar base: The url of the base directory for this branch; the one
1466
containing the .bzr directory.
1469
def __init__(self, _format=None,
1470
_control_files=None, a_bzrdir=None, _repository=None):
1471
"""Create new branch object at a particular location."""
1472
if a_bzrdir is None:
1473
raise ValueError('a_bzrdir must be supplied')
1475
self.bzrdir = a_bzrdir
1476
self._base = self.bzrdir.transport.clone('..').base
1477
# XXX: We should be able to just do
1478
# self.base = self.bzrdir.root_transport.base
1479
# but this does not quite work yet -- mbp 20080522
1480
self._format = _format
1481
if _control_files is None:
1482
raise ValueError('BzrBranch _control_files is None')
1483
self.control_files = _control_files
1484
self._transport = _control_files._transport
1485
self.repository = _repository
1486
Branch.__init__(self)
1489
return '%s(%r)' % (self.__class__.__name__, self.base)
1493
def _get_base(self):
1494
"""Returns the directory containing the control directory."""
1497
base = property(_get_base, doc="The URL for the root of this branch.")
1499
def is_locked(self):
1500
return self.control_files.is_locked()
1502
def lock_write(self, token=None):
1503
repo_token = self.repository.lock_write()
1505
token = self.control_files.lock_write(token=token)
1507
self.repository.unlock()
1511
def lock_read(self):
1512
self.repository.lock_read()
1514
self.control_files.lock_read()
1516
self.repository.unlock()
1520
# TODO: test for failed two phase locks. This is known broken.
1522
self.control_files.unlock()
1524
self.repository.unlock()
1525
if not self.control_files.is_locked():
1526
# we just released the lock
1527
self._clear_cached_state()
1529
def peek_lock_mode(self):
1530
if self.control_files._lock_count == 0:
1533
return self.control_files._lock_mode
1535
def get_physical_lock_status(self):
1536
return self.control_files.get_physical_lock_status()
1539
def print_file(self, file, revision_id):
1540
"""See Branch.print_file."""
1541
return self.repository.print_file(file, revision_id)
1543
def _write_revision_history(self, history):
1544
"""Factored out of set_revision_history.
1546
This performs the actual writing to disk.
1547
It is intended to be called by BzrBranch5.set_revision_history."""
1548
self._transport.put_bytes(
1549
'revision-history', '\n'.join(history),
1550
mode=self.bzrdir._get_file_mode())
1553
def set_revision_history(self, rev_history):
1554
"""See Branch.set_revision_history."""
1555
if 'evil' in debug.debug_flags:
1556
mutter_callsite(3, "set_revision_history scales with history.")
1557
check_not_reserved_id = _mod_revision.check_not_reserved_id
1558
for rev_id in rev_history:
1559
check_not_reserved_id(rev_id)
1560
if Branch.hooks['post_change_branch_tip']:
1561
# Don't calculate the last_revision_info() if there are no hooks
1563
old_revno, old_revid = self.last_revision_info()
1564
if len(rev_history) == 0:
1565
revid = _mod_revision.NULL_REVISION
1567
revid = rev_history[-1]
1568
self._run_pre_change_branch_tip_hooks(len(rev_history), revid)
1569
self._write_revision_history(rev_history)
1570
self._clear_cached_state()
1571
self._cache_revision_history(rev_history)
1572
for hook in Branch.hooks['set_rh']:
1573
hook(self, rev_history)
1574
if Branch.hooks['post_change_branch_tip']:
1575
self._run_post_change_branch_tip_hooks(old_revno, old_revid)
1577
def _run_pre_change_branch_tip_hooks(self, new_revno, new_revid):
1578
"""Run the pre_change_branch_tip hooks."""
1579
hooks = Branch.hooks['pre_change_branch_tip']
1582
old_revno, old_revid = self.last_revision_info()
1583
params = ChangeBranchTipParams(
1584
self, old_revno, new_revno, old_revid, new_revid)
1588
except errors.TipChangeRejected:
1591
exc_info = sys.exc_info()
1592
hook_name = Branch.hooks.get_hook_name(hook)
1593
raise errors.HookFailed(
1594
'pre_change_branch_tip', hook_name, exc_info)
1596
def _run_post_change_branch_tip_hooks(self, old_revno, old_revid):
1597
"""Run the post_change_branch_tip hooks."""
1598
hooks = Branch.hooks['post_change_branch_tip']
1601
new_revno, new_revid = self.last_revision_info()
1602
params = ChangeBranchTipParams(
1603
self, old_revno, new_revno, old_revid, new_revid)
1608
def set_last_revision_info(self, revno, revision_id):
1609
"""Set the last revision of this branch.
1611
The caller is responsible for checking that the revno is correct
1612
for this revision id.
1614
It may be possible to set the branch last revision to an id not
1615
present in the repository. However, branches can also be
1616
configured to check constraints on history, in which case this may not
1619
revision_id = _mod_revision.ensure_null(revision_id)
1620
# this old format stores the full history, but this api doesn't
1621
# provide it, so we must generate, and might as well check it's
1623
history = self._lefthand_history(revision_id)
1624
if len(history) != revno:
1625
raise AssertionError('%d != %d' % (len(history), revno))
1626
self.set_revision_history(history)
1628
def _gen_revision_history(self):
1629
history = self._transport.get_bytes('revision-history').split('\n')
1630
if history[-1:] == ['']:
1631
# There shouldn't be a trailing newline, but just in case.
1635
def _lefthand_history(self, revision_id, last_rev=None,
1637
if 'evil' in debug.debug_flags:
1638
mutter_callsite(4, "_lefthand_history scales with history.")
1639
# stop_revision must be a descendant of last_revision
1640
graph = self.repository.get_graph()
1641
if last_rev is not None:
1642
if not graph.is_ancestor(last_rev, revision_id):
1643
# our previous tip is not merged into stop_revision
1644
raise errors.DivergedBranches(self, other_branch)
1645
# make a new revision history from the graph
1646
parents_map = graph.get_parent_map([revision_id])
1647
if revision_id not in parents_map:
1648
raise errors.NoSuchRevision(self, revision_id)
1649
current_rev_id = revision_id
1651
check_not_reserved_id = _mod_revision.check_not_reserved_id
1652
# Do not include ghosts or graph origin in revision_history
1653
while (current_rev_id in parents_map and
1654
len(parents_map[current_rev_id]) > 0):
1655
check_not_reserved_id(current_rev_id)
1656
new_history.append(current_rev_id)
1657
current_rev_id = parents_map[current_rev_id][0]
1658
parents_map = graph.get_parent_map([current_rev_id])
1659
new_history.reverse()
1663
def generate_revision_history(self, revision_id, last_rev=None,
1665
"""Create a new revision history that will finish with revision_id.
1667
:param revision_id: the new tip to use.
1668
:param last_rev: The previous last_revision. If not None, then this
1669
must be a ancestory of revision_id, or DivergedBranches is raised.
1670
:param other_branch: The other branch that DivergedBranches should
1671
raise with respect to.
1673
self.set_revision_history(self._lefthand_history(revision_id,
1674
last_rev, other_branch))
1676
def basis_tree(self):
1677
"""See Branch.basis_tree."""
1678
return self.repository.revision_tree(self.last_revision())
1681
def pull(self, source, overwrite=False, stop_revision=None,
1682
_hook_master=None, run_hooks=True, possible_transports=None,
1683
_override_hook_target=None):
1686
:param _hook_master: Private parameter - set the branch to
1687
be supplied as the master to pull hooks.
1688
:param run_hooks: Private parameter - if false, this branch
1689
is being called because it's the master of the primary branch,
1690
so it should not run its hooks.
1691
:param _override_hook_target: Private parameter - set the branch to be
1692
supplied as the target_branch to pull hooks.
1694
result = PullResult()
1695
result.source_branch = source
1696
if _override_hook_target is None:
1697
result.target_branch = self
1699
result.target_branch = _override_hook_target
1702
# We assume that during 'pull' the local repository is closer than
1704
graph = self.repository.get_graph(source.repository)
1705
result.old_revno, result.old_revid = self.last_revision_info()
1706
self.update_revisions(source, stop_revision, overwrite=overwrite,
1708
result.tag_conflicts = source.tags.merge_to(self.tags, overwrite)
1709
result.new_revno, result.new_revid = self.last_revision_info()
1711
result.master_branch = _hook_master
1712
result.local_branch = result.target_branch
1714
result.master_branch = result.target_branch
1715
result.local_branch = None
1717
for hook in Branch.hooks['post_pull']:
1723
def _get_parent_location(self):
1724
_locs = ['parent', 'pull', 'x-pull']
1727
return self._transport.get_bytes(l).strip('\n')
1728
except errors.NoSuchFile:
1733
def push(self, target, overwrite=False, stop_revision=None,
1734
_override_hook_source_branch=None):
1737
This is the basic concrete implementation of push()
1739
:param _override_hook_source_branch: If specified, run
1740
the hooks passing this Branch as the source, rather than self.
1741
This is for use of RemoteBranch, where push is delegated to the
1742
underlying vfs-based Branch.
1744
# TODO: Public option to disable running hooks - should be trivial but
1746
return _run_with_write_locked_target(
1747
target, self._push_with_bound_branches, target, overwrite,
1749
_override_hook_source_branch=_override_hook_source_branch)
1751
def _push_with_bound_branches(self, target, overwrite,
1753
_override_hook_source_branch=None):
1754
"""Push from self into target, and into target's master if any.
1756
This is on the base BzrBranch class even though it doesn't support
1757
bound branches because the *target* might be bound.
1760
if _override_hook_source_branch:
1761
result.source_branch = _override_hook_source_branch
1762
for hook in Branch.hooks['post_push']:
1765
bound_location = target.get_bound_location()
1766
if bound_location and target.base != bound_location:
1767
# there is a master branch.
1769
# XXX: Why the second check? Is it even supported for a branch to
1770
# be bound to itself? -- mbp 20070507
1771
master_branch = target.get_master_branch()
1772
master_branch.lock_write()
1774
# push into the master from this branch.
1775
self._basic_push(master_branch, overwrite, stop_revision)
1776
# and push into the target branch from this. Note that we push from
1777
# this branch again, because its considered the highest bandwidth
1779
result = self._basic_push(target, overwrite, stop_revision)
1780
result.master_branch = master_branch
1781
result.local_branch = target
1785
master_branch.unlock()
1788
result = self._basic_push(target, overwrite, stop_revision)
1789
# TODO: Why set master_branch and local_branch if there's no
1790
# binding? Maybe cleaner to just leave them unset? -- mbp
1792
result.master_branch = target
1793
result.local_branch = None
1797
def _basic_push(self, target, overwrite, stop_revision):
1798
"""Basic implementation of push without bound branches or hooks.
1800
Must be called with self read locked and target write locked.
1802
result = PushResult()
1803
result.source_branch = self
1804
result.target_branch = target
1805
result.old_revno, result.old_revid = target.last_revision_info()
1806
if result.old_revid != self.last_revision():
1807
# We assume that during 'push' this repository is closer than
1809
graph = self.repository.get_graph(target.repository)
1810
target.update_revisions(self, stop_revision, overwrite=overwrite,
1812
if self._push_should_merge_tags():
1813
result.tag_conflicts = self.tags.merge_to(target.tags, overwrite)
1814
result.new_revno, result.new_revid = target.last_revision_info()
1817
def _push_should_merge_tags(self):
1818
"""Should _basic_push merge this branch's tags into the target?
1820
The default implementation returns False if this branch has no tags,
1821
and True the rest of the time. Subclasses may override this.
1823
return self.tags.supports_tags() and self.tags.get_tag_dict()
1825
def get_parent(self):
1826
"""See Branch.get_parent."""
1827
parent = self._get_parent_location()
1830
# This is an old-format absolute path to a local branch
1831
# turn it into a url
1832
if parent.startswith('/'):
1833
parent = urlutils.local_path_to_url(parent.decode('utf8'))
1835
return urlutils.join(self.base[:-1], parent)
1836
except errors.InvalidURLJoin, e:
1837
raise errors.InaccessibleParent(parent, self.base)
1839
def get_stacked_on_url(self):
1840
raise errors.UnstackableBranchFormat(self._format, self.base)
1842
def set_push_location(self, location):
1843
"""See Branch.set_push_location."""
1844
self.get_config().set_user_option(
1845
'push_location', location,
1846
store=_mod_config.STORE_LOCATION_NORECURSE)
1849
def set_parent(self, url):
1850
"""See Branch.set_parent."""
1851
# TODO: Maybe delete old location files?
1852
# URLs should never be unicode, even on the local fs,
1853
# FIXUP this and get_parent in a future branch format bump:
1854
# read and rewrite the file. RBC 20060125
1856
if isinstance(url, unicode):
1858
url = url.encode('ascii')
1859
except UnicodeEncodeError:
1860
raise errors.InvalidURL(url,
1861
"Urls must be 7-bit ascii, "
1862
"use bzrlib.urlutils.escape")
1863
url = urlutils.relative_url(self.base, url)
1864
self._set_parent_location(url)
1866
def _set_parent_location(self, url):
1868
self._transport.delete('parent')
1870
self._transport.put_bytes('parent', url + '\n',
1871
mode=self.bzrdir._get_file_mode())
1873
def set_stacked_on_url(self, url):
1874
raise errors.UnstackableBranchFormat(self._format, self.base)
1877
class BzrBranch5(BzrBranch):
1878
"""A format 5 branch. This supports new features over plain branches.
1880
It has support for a master_branch which is the data for bound branches.
1884
def pull(self, source, overwrite=False, stop_revision=None,
1885
run_hooks=True, possible_transports=None,
1886
_override_hook_target=None):
1887
"""Pull from source into self, updating my master if any.
1889
:param run_hooks: Private parameter - if false, this branch
1890
is being called because it's the master of the primary branch,
1891
so it should not run its hooks.
1893
bound_location = self.get_bound_location()
1894
master_branch = None
1895
if bound_location and source.base != bound_location:
1896
# not pulling from master, so we need to update master.
1897
master_branch = self.get_master_branch(possible_transports)
1898
master_branch.lock_write()
1901
# pull from source into master.
1902
master_branch.pull(source, overwrite, stop_revision,
1904
return super(BzrBranch5, self).pull(source, overwrite,
1905
stop_revision, _hook_master=master_branch,
1906
run_hooks=run_hooks,
1907
_override_hook_target=_override_hook_target)
1910
master_branch.unlock()
1912
def get_bound_location(self):
1914
return self._transport.get_bytes('bound')[:-1]
1915
except errors.NoSuchFile:
1919
def get_master_branch(self, possible_transports=None):
1920
"""Return the branch we are bound to.
1922
:return: Either a Branch, or None
1924
This could memoise the branch, but if thats done
1925
it must be revalidated on each new lock.
1926
So for now we just don't memoise it.
1927
# RBC 20060304 review this decision.
1929
bound_loc = self.get_bound_location()
1933
return Branch.open(bound_loc,
1934
possible_transports=possible_transports)
1935
except (errors.NotBranchError, errors.ConnectionError), e:
1936
raise errors.BoundBranchConnectionFailure(
1940
def set_bound_location(self, location):
1941
"""Set the target where this branch is bound to.
1943
:param location: URL to the target branch
1946
self._transport.put_bytes('bound', location+'\n',
1947
mode=self.bzrdir._get_file_mode())
1950
self._transport.delete('bound')
1951
except errors.NoSuchFile:
1956
def bind(self, other):
1957
"""Bind this branch to the branch other.
1959
This does not push or pull data between the branches, though it does
1960
check for divergence to raise an error when the branches are not
1961
either the same, or one a prefix of the other. That behaviour may not
1962
be useful, so that check may be removed in future.
1964
:param other: The branch to bind to
1967
# TODO: jam 20051230 Consider checking if the target is bound
1968
# It is debatable whether you should be able to bind to
1969
# a branch which is itself bound.
1970
# Committing is obviously forbidden,
1971
# but binding itself may not be.
1972
# Since we *have* to check at commit time, we don't
1973
# *need* to check here
1975
# we want to raise diverged if:
1976
# last_rev is not in the other_last_rev history, AND
1977
# other_last_rev is not in our history, and do it without pulling
1979
self.set_bound_location(other.base)
1983
"""If bound, unbind"""
1984
return self.set_bound_location(None)
1987
def update(self, possible_transports=None):
1988
"""Synchronise this branch with the master branch if any.
1990
:return: None or the last_revision that was pivoted out during the
1993
master = self.get_master_branch(possible_transports)
1994
if master is not None:
1995
old_tip = _mod_revision.ensure_null(self.last_revision())
1996
self.pull(master, overwrite=True)
1997
if self.repository.get_graph().is_ancestor(old_tip,
1998
_mod_revision.ensure_null(self.last_revision())):
2004
class BzrBranch7(BzrBranch5):
2005
"""A branch with support for a fallback repository."""
2007
def _get_fallback_repository(self, url):
2008
"""Get the repository we fallback to at url."""
2009
url = urlutils.join(self.base, url)
2010
return bzrdir.BzrDir.open(url).open_branch().repository
2012
def _activate_fallback_location(self, url):
2013
"""Activate the branch/repository from url as a fallback repository."""
2014
self.repository.add_fallback_repository(
2015
self._get_fallback_repository(url))
2017
def _open_hook(self):
2019
url = self.get_stacked_on_url()
2020
except (errors.UnstackableRepositoryFormat, errors.NotStacked,
2021
errors.UnstackableBranchFormat):
2024
self._activate_fallback_location(url)
2026
def _check_stackable_repo(self):
2027
if not self.repository._format.supports_external_lookups:
2028
raise errors.UnstackableRepositoryFormat(self.repository._format,
2029
self.repository.base)
2031
def __init__(self, *args, **kwargs):
2032
super(BzrBranch7, self).__init__(*args, **kwargs)
2033
self._last_revision_info_cache = None
2034
self._partial_revision_history_cache = []
2036
def _clear_cached_state(self):
2037
super(BzrBranch7, self)._clear_cached_state()
2038
self._last_revision_info_cache = None
2039
self._partial_revision_history_cache = []
2041
def _last_revision_info(self):
2042
revision_string = self._transport.get_bytes('last-revision')
2043
revno, revision_id = revision_string.rstrip('\n').split(' ', 1)
2044
revision_id = cache_utf8.get_cached_utf8(revision_id)
2046
return revno, revision_id
2048
def _write_last_revision_info(self, revno, revision_id):
2049
"""Simply write out the revision id, with no checks.
2051
Use set_last_revision_info to perform this safely.
2053
Does not update the revision_history cache.
2054
Intended to be called by set_last_revision_info and
2055
_write_revision_history.
2057
revision_id = _mod_revision.ensure_null(revision_id)
2058
out_string = '%d %s\n' % (revno, revision_id)
2059
self._transport.put_bytes('last-revision', out_string,
2060
mode=self.bzrdir._get_file_mode())
2063
def set_last_revision_info(self, revno, revision_id):
2064
revision_id = _mod_revision.ensure_null(revision_id)
2065
old_revno, old_revid = self.last_revision_info()
2066
if self._get_append_revisions_only():
2067
self._check_history_violation(revision_id)
2068
self._run_pre_change_branch_tip_hooks(revno, revision_id)
2069
self._write_last_revision_info(revno, revision_id)
2070
self._clear_cached_state()
2071
self._last_revision_info_cache = revno, revision_id
2072
self._run_post_change_branch_tip_hooks(old_revno, old_revid)
2074
def _check_history_violation(self, revision_id):
2075
last_revision = _mod_revision.ensure_null(self.last_revision())
2076
if _mod_revision.is_null(last_revision):
2078
if last_revision not in self._lefthand_history(revision_id):
2079
raise errors.AppendRevisionsOnlyViolation(self.base)
2081
def _gen_revision_history(self):
2082
"""Generate the revision history from last revision
2084
last_revno, last_revision = self.last_revision_info()
2085
self._extend_partial_history(stop_index=last_revno-1)
2086
return list(reversed(self._partial_revision_history_cache))
2088
def _extend_partial_history(self, stop_index=None, stop_revision=None):
2089
"""Extend the partial history to include a given index
2091
If a stop_index is supplied, stop when that index has been reached.
2092
If a stop_revision is supplied, stop when that revision is
2093
encountered. Otherwise, stop when the beginning of history is
2096
:param stop_index: The index which should be present. When it is
2097
present, history extension will stop.
2098
:param revision_id: The revision id which should be present. When
2099
it is encountered, history extension will stop.
2101
repo = self.repository
2102
if len(self._partial_revision_history_cache) == 0:
2103
iterator = repo.iter_reverse_revision_history(self.last_revision())
2105
start_revision = self._partial_revision_history_cache[-1]
2106
iterator = repo.iter_reverse_revision_history(start_revision)
2107
#skip the last revision in the list
2108
next_revision = iterator.next()
2109
for revision_id in iterator:
2110
self._partial_revision_history_cache.append(revision_id)
2111
if (stop_index is not None and
2112
len(self._partial_revision_history_cache) > stop_index):
2114
if revision_id == stop_revision:
2117
def _write_revision_history(self, history):
2118
"""Factored out of set_revision_history.
2120
This performs the actual writing to disk, with format-specific checks.
2121
It is intended to be called by BzrBranch5.set_revision_history.
2123
if len(history) == 0:
2124
last_revision = 'null:'
2126
if history != self._lefthand_history(history[-1]):
2127
raise errors.NotLefthandHistory(history)
2128
last_revision = history[-1]
2129
if self._get_append_revisions_only():
2130
self._check_history_violation(last_revision)
2131
self._write_last_revision_info(len(history), last_revision)
2134
def _set_parent_location(self, url):
2135
"""Set the parent branch"""
2136
self._set_config_location('parent_location', url, make_relative=True)
2139
def _get_parent_location(self):
2140
"""Set the parent branch"""
2141
return self._get_config_location('parent_location')
2143
def set_push_location(self, location):
2144
"""See Branch.set_push_location."""
2145
self._set_config_location('push_location', location)
2147
def set_bound_location(self, location):
2148
"""See Branch.set_push_location."""
2150
config = self.get_config()
2151
if location is None:
2152
if config.get_user_option('bound') != 'True':
2155
config.set_user_option('bound', 'False', warn_masked=True)
2158
self._set_config_location('bound_location', location,
2160
config.set_user_option('bound', 'True', warn_masked=True)
2163
def _get_bound_location(self, bound):
2164
"""Return the bound location in the config file.
2166
Return None if the bound parameter does not match"""
2167
config = self.get_config()
2168
config_bound = (config.get_user_option('bound') == 'True')
2169
if config_bound != bound:
2171
return self._get_config_location('bound_location', config=config)
2173
def get_bound_location(self):
2174
"""See Branch.set_push_location."""
2175
return self._get_bound_location(True)
2177
def get_old_bound_location(self):
2178
"""See Branch.get_old_bound_location"""
2179
return self._get_bound_location(False)
2181
def get_stacked_on_url(self):
2182
# you can always ask for the URL; but you might not be able to use it
2183
# if the repo can't support stacking.
2184
## self._check_stackable_repo()
2185
stacked_url = self._get_config_location('stacked_on_location')
2186
if stacked_url is None:
2187
raise errors.NotStacked(self)
2190
def set_append_revisions_only(self, enabled):
2195
self.get_config().set_user_option('append_revisions_only', value,
2198
def set_stacked_on_url(self, url):
2199
self._check_stackable_repo()
2202
old_url = self.get_stacked_on_url()
2203
except (errors.NotStacked, errors.UnstackableBranchFormat,
2204
errors.UnstackableRepositoryFormat):
2207
# repositories don't offer an interface to remove fallback
2208
# repositories today; take the conceptually simpler option and just
2210
self.repository = self.bzrdir.find_repository()
2211
# for every revision reference the branch has, ensure it is pulled
2213
source_repository = self._get_fallback_repository(old_url)
2214
for revision_id in chain([self.last_revision()],
2215
self.tags.get_reverse_tag_dict()):
2216
self.repository.fetch(source_repository, revision_id,
2219
self._activate_fallback_location(url)
2220
# write this out after the repository is stacked to avoid setting a
2221
# stacked config that doesn't work.
2222
self._set_config_location('stacked_on_location', url)
2224
def _get_append_revisions_only(self):
2225
value = self.get_config().get_user_option('append_revisions_only')
2226
return value == 'True'
2228
def _synchronize_history(self, destination, revision_id):
2229
"""Synchronize last revision and revision history between branches.
2231
This version is most efficient when the destination is also a
2232
BzrBranch6, but works for BzrBranch5, as long as the destination's
2233
repository contains all the lefthand ancestors of the intended
2234
last_revision. If not, set_last_revision_info will fail.
2236
:param destination: The branch to copy the history into
2237
:param revision_id: The revision-id to truncate history at. May
2238
be None to copy complete history.
2240
source_revno, source_revision_id = self.last_revision_info()
2241
if revision_id is None:
2242
revno, revision_id = source_revno, source_revision_id
2243
elif source_revision_id == revision_id:
2244
# we know the revno without needing to walk all of history
2245
revno = source_revno
2247
# To figure out the revno for a random revision, we need to build
2248
# the revision history, and count its length.
2249
# We don't care about the order, just how long it is.
2250
# Alternatively, we could start at the current location, and count
2251
# backwards. But there is no guarantee that we will find it since
2252
# it may be a merged revision.
2253
revno = len(list(self.repository.iter_reverse_revision_history(
2255
destination.set_last_revision_info(revno, revision_id)
2257
def _make_tags(self):
2258
return BasicTags(self)
2261
def generate_revision_history(self, revision_id, last_rev=None,
2263
"""See BzrBranch5.generate_revision_history"""
2264
history = self._lefthand_history(revision_id, last_rev, other_branch)
2265
revno = len(history)
2266
self.set_last_revision_info(revno, revision_id)
2269
def get_rev_id(self, revno, history=None):
2270
"""Find the revision id of the specified revno."""
2272
return _mod_revision.NULL_REVISION
2274
last_revno, last_revision_id = self.last_revision_info()
2275
if revno <= 0 or revno > last_revno:
2276
raise errors.NoSuchRevision(self, revno)
2278
if history is not None:
2279
return history[revno - 1]
2281
index = last_revno - revno
2282
if len(self._partial_revision_history_cache) <= index:
2283
self._extend_partial_history(stop_index=index)
2284
if len(self._partial_revision_history_cache) > index:
2285
return self._partial_revision_history_cache[index]
2287
raise errors.NoSuchRevision(self, revno)
2290
def revision_id_to_revno(self, revision_id):
2291
"""Given a revision id, return its revno"""
2292
if _mod_revision.is_null(revision_id):
2295
index = self._partial_revision_history_cache.index(revision_id)
2297
self._extend_partial_history(stop_revision=revision_id)
2298
index = len(self._partial_revision_history_cache) - 1
2299
if self._partial_revision_history_cache[index] != revision_id:
2300
raise errors.NoSuchRevision(self, revision_id)
2301
return self.revno() - index
2304
class BzrBranch6(BzrBranch7):
2305
"""See BzrBranchFormat6 for the capabilities of this branch.
2307
This subclass of BzrBranch7 disables the new features BzrBranch7 added,
2311
def get_stacked_on_url(self):
2312
raise errors.UnstackableBranchFormat(self._format, self.base)
2314
def set_stacked_on_url(self, url):
2315
raise errors.UnstackableBranchFormat(self._format, self.base)
2318
######################################################################
2319
# results of operations
2322
class _Result(object):
2324
def _show_tag_conficts(self, to_file):
2325
if not getattr(self, 'tag_conflicts', None):
2327
to_file.write('Conflicting tags:\n')
2328
for name, value1, value2 in self.tag_conflicts:
2329
to_file.write(' %s\n' % (name, ))
2332
class PullResult(_Result):
2333
"""Result of a Branch.pull operation.
2335
:ivar old_revno: Revision number before pull.
2336
:ivar new_revno: Revision number after pull.
2337
:ivar old_revid: Tip revision id before pull.
2338
:ivar new_revid: Tip revision id after pull.
2339
:ivar source_branch: Source (local) branch object.
2340
:ivar master_branch: Master branch of the target, or the target if no
2342
:ivar local_branch: target branch if there is a Master, else None
2343
:ivar target_branch: Target/destination branch object.
2344
:ivar tag_conflicts: A list of tag conflicts, see BasicTags.merge_to
2348
# DEPRECATED: pull used to return the change in revno
2349
return self.new_revno - self.old_revno
2351
def report(self, to_file):
2353
if self.old_revid == self.new_revid:
2354
to_file.write('No revisions to pull.\n')
2356
to_file.write('Now on revision %d.\n' % self.new_revno)
2357
self._show_tag_conficts(to_file)
2360
class PushResult(_Result):
2361
"""Result of a Branch.push operation.
2363
:ivar old_revno: Revision number before push.
2364
:ivar new_revno: Revision number after push.
2365
:ivar old_revid: Tip revision id before push.
2366
:ivar new_revid: Tip revision id after push.
2367
:ivar source_branch: Source branch object.
2368
:ivar master_branch: Master branch of the target, or None.
2369
:ivar target_branch: Target/destination branch object.
2373
# DEPRECATED: push used to return the change in revno
2374
return self.new_revno - self.old_revno
2376
def report(self, to_file):
2377
"""Write a human-readable description of the result."""
2378
if self.old_revid == self.new_revid:
2379
to_file.write('No new revisions to push.\n')
2381
to_file.write('Pushed up to revision %d.\n' % self.new_revno)
2382
self._show_tag_conficts(to_file)
2385
class BranchCheckResult(object):
2386
"""Results of checking branch consistency.
2391
def __init__(self, branch):
2392
self.branch = branch
2394
def report_results(self, verbose):
2395
"""Report the check results via trace.note.
2397
:param verbose: Requests more detailed display of what was checked,
2400
note('checked branch %s format %s',
2402
self.branch._format)
2405
class Converter5to6(object):
2406
"""Perform an in-place upgrade of format 5 to format 6"""
2408
def convert(self, branch):
2409
# Data for 5 and 6 can peacefully coexist.
2410
format = BzrBranchFormat6()
2411
new_branch = format.open(branch.bzrdir, _found=True)
2413
# Copy source data into target
2414
new_branch._write_last_revision_info(*branch.last_revision_info())
2415
new_branch.set_parent(branch.get_parent())
2416
new_branch.set_bound_location(branch.get_bound_location())
2417
new_branch.set_push_location(branch.get_push_location())
2419
# New branch has no tags by default
2420
new_branch.tags._set_tag_dict({})
2422
# Copying done; now update target format
2423
new_branch._transport.put_bytes('format',
2424
format.get_format_string(),
2425
mode=new_branch.bzrdir._get_file_mode())
2427
# Clean up old files
2428
new_branch._transport.delete('revision-history')
2430
branch.set_parent(None)
2431
except errors.NoSuchFile:
2433
branch.set_bound_location(None)
2436
class Converter6to7(object):
2437
"""Perform an in-place upgrade of format 6 to format 7"""
2439
def convert(self, branch):
2440
format = BzrBranchFormat7()
2441
branch._set_config_location('stacked_on_location', '')
2442
# update target format
2443
branch._transport.put_bytes('format', format.get_format_string())
2447
def _run_with_write_locked_target(target, callable, *args, **kwargs):
2448
"""Run ``callable(*args, **kwargs)``, write-locking target for the
2451
_run_with_write_locked_target will attempt to release the lock it acquires.
2453
If an exception is raised by callable, then that exception *will* be
2454
propagated, even if the unlock attempt raises its own error. Thus
2455
_run_with_write_locked_target should be preferred to simply doing::
2459
return callable(*args, **kwargs)
2464
# This is very similar to bzrlib.decorators.needs_write_lock. Perhaps they
2465
# should share code?
2468
result = callable(*args, **kwargs)
2470
exc_info = sys.exc_info()
2474
raise exc_info[0], exc_info[1], exc_info[2]
added
removed
bzrlib/branch.py
