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# Copyright (C) 2005, 2006, 2007, 2008, 2009 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 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, TransportConfig
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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 HookPoint, Hooks
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from bzrlib.inter import InterObject
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from bzrlib import registry
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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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def __init__(self, *ignored, **ignored_too):
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self.tags = self._format.make_tags(self)
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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._partial_revision_id_to_revno_cache = {}
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self._last_revision_info_cache = None
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self._merge_sorted_revisions_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 _activate_fallback_location(self, url, lock_style):
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"""Activate the branch/repository from url as a fallback repository."""
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repo = self._get_fallback_repository(url)
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if lock_style == 'write':
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elif lock_style == 'read':
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self.repository.add_fallback_repository(repo)
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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 _check_stackable_repo(self):
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if not self.repository._format.supports_external_lookups:
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raise errors.UnstackableRepositoryFormat(self.repository._format,
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self.repository.base)
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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 _push_should_merge_tags(self):
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"""Should _basic_push merge this branch's tags into the target?
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The default implementation returns False if this branch has no tags,
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and True the rest of the time. Subclasses may override this.
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return self.supports_tags() and self.tags.get_tag_dict()
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def get_config(self):
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return BranchConfig(self)
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def _get_config(self):
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"""Get the concrete config for just the config in this branch.
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This is not intended for client use; see Branch.get_config for the
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:return: An object supporting get_option and set_option.
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raise NotImplementedError(self._get_config)
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def _get_fallback_repository(self, url):
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"""Get the repository we fallback to at url."""
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url = urlutils.join(self.base, url)
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a_bzrdir = bzrdir.BzrDir.open(url,
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possible_transports=[self.bzrdir.root_transport])
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return a_bzrdir.open_branch().repository
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def _get_tags_bytes(self):
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"""Get the bytes of a serialised tags dict.
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Note that not all branches support tags, nor do all use the same tags
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logic: this method is specific to BasicTags. Other tag implementations
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may use the same method name and behave differently, safely, because
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of the double-dispatch via
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format.make_tags->tags_instance->get_tags_dict.
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:return: The bytes of the tags file.
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:seealso: Branch._set_tags_bytes.
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return self._transport.get_bytes('tags')
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def _get_nick(self, local=False, possible_transports=None):
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config = self.get_config()
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# explicit overrides master, but don't look for master if local is True
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if not local and not config.has_explicit_nickname():
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master = self.get_master_branch(possible_transports)
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if master is not None:
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# return the master branch value
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except errors.BzrError, e:
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# Silently fall back to local implicit nick if the master is
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mutter("Could not connect to bound branch, "
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"falling back to local nick.\n " + str(e))
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return config.get_nickname()
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def _set_nick(self, nick):
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self.get_config().set_user_option('nickname', nick, warn_masked=True)
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nick = property(_get_nick, _set_nick)
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raise NotImplementedError(self.is_locked)
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def _lefthand_history(self, revision_id, last_rev=None,
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if 'evil' in debug.debug_flags:
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mutter_callsite(4, "_lefthand_history scales with history.")
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# stop_revision must be a descendant of last_revision
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graph = self.repository.get_graph()
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if last_rev is not None:
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if not graph.is_ancestor(last_rev, revision_id):
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# our previous tip is not merged into stop_revision
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raise errors.DivergedBranches(self, other_branch)
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# make a new revision history from the graph
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parents_map = graph.get_parent_map([revision_id])
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if revision_id not in parents_map:
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raise errors.NoSuchRevision(self, revision_id)
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current_rev_id = revision_id
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check_not_reserved_id = _mod_revision.check_not_reserved_id
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# Do not include ghosts or graph origin in revision_history
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while (current_rev_id in parents_map and
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len(parents_map[current_rev_id]) > 0):
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check_not_reserved_id(current_rev_id)
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new_history.append(current_rev_id)
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current_rev_id = parents_map[current_rev_id][0]
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parents_map = graph.get_parent_map([current_rev_id])
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new_history.reverse()
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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 dotted_revno_to_revision_id(self, revno, _cache_reverse=False):
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"""Return the revision_id for a dotted revno.
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:param revno: a tuple like (1,) or (1,1,2)
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:param _cache_reverse: a private parameter enabling storage
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of the reverse mapping in a top level cache. (This should
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only be done in selective circumstances as we want to
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avoid having the mapping cached multiple times.)
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:return: the revision_id
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:raises errors.NoSuchRevision: if the revno doesn't exist
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rev_id = self._do_dotted_revno_to_revision_id(revno)
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self._partial_revision_id_to_revno_cache[rev_id] = revno
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def _do_dotted_revno_to_revision_id(self, revno):
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"""Worker function for dotted_revno_to_revision_id.
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Subclasses should override this if they wish to
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provide a more efficient implementation.
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return self.get_rev_id(revno[0])
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revision_id_to_revno = self.get_revision_id_to_revno_map()
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revision_ids = [revision_id for revision_id, this_revno
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in revision_id_to_revno.iteritems()
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if revno == this_revno]
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if len(revision_ids) == 1:
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return revision_ids[0]
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revno_str = '.'.join(map(str, revno))
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raise errors.NoSuchRevision(self, revno_str)
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def revision_id_to_dotted_revno(self, revision_id):
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"""Given a revision id, return its dotted revno.
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:return: a tuple like (1,) or (400,1,3).
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return self._do_revision_id_to_dotted_revno(revision_id)
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def _do_revision_id_to_dotted_revno(self, revision_id):
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"""Worker function for revision_id_to_revno."""
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# Try the caches if they are loaded
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result = self._partial_revision_id_to_revno_cache.get(revision_id)
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if result is not None:
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if self._revision_id_to_revno_cache:
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result = self._revision_id_to_revno_cache.get(revision_id)
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raise errors.NoSuchRevision(self, revision_id)
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# Try the mainline as it's optimised
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revno = self.revision_id_to_revno(revision_id)
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except errors.NoSuchRevision:
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# We need to load and use the full revno map after all
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result = self.get_revision_id_to_revno_map().get(revision_id)
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raise errors.NoSuchRevision(self, revision_id)
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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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revision_id_to_revno = dict((rev_id, revno)
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for rev_id, depth, revno, end_of_merge
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in self.iter_merge_sorted_revisions())
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return revision_id_to_revno
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def iter_merge_sorted_revisions(self, start_revision_id=None,
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stop_revision_id=None, stop_rule='exclude', direction='reverse'):
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"""Walk the revisions for a branch in merge sorted order.
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Merge sorted order is the output from a merge-aware,
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topological sort, i.e. all parents come before their
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children going forward; the opposite for reverse.
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:param start_revision_id: the revision_id to begin walking from.
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If None, the branch tip is used.
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:param stop_revision_id: the revision_id to terminate the walk
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after. If None, the rest of history is included.
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:param stop_rule: if stop_revision_id is not None, the precise rule
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to use for termination:
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* 'exclude' - leave the stop revision out of the result (default)
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* 'include' - the stop revision is the last item in the result
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* 'with-merges' - include the stop revision and all of its
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merged revisions in the result
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:param direction: either 'reverse' or 'forward':
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* reverse means return the start_revision_id first, i.e.
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start at the most recent revision and go backwards in history
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* forward returns tuples in the opposite order to reverse.
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Note in particular that forward does *not* do any intelligent
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ordering w.r.t. depth as some clients of this API may like.
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(If required, that ought to be done at higher layers.)
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:return: an iterator over (revision_id, depth, revno, end_of_merge)
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* revision_id: the unique id of the revision
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* depth: How many levels of merging deep this node has been
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* revno_sequence: This field provides a sequence of
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revision numbers for all revisions. The format is:
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(REVNO, BRANCHNUM, BRANCHREVNO). BRANCHNUM is the number of the
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branch that the revno is on. From left to right the REVNO numbers
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are the sequence numbers within that branch of the revision.
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* end_of_merge: When True the next node (earlier in history) is
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part of a different merge.
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# Note: depth and revno values are in the context of the branch so
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# we need the full graph to get stable numbers, regardless of the
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if self._merge_sorted_revisions_cache is None:
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last_revision = self.last_revision()
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graph = self.repository.get_graph()
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parent_map = dict(((key, value) for key, value in
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graph.iter_ancestry([last_revision]) if value is not None))
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revision_graph = repository._strip_NULL_ghosts(parent_map)
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revs = tsort.merge_sort(revision_graph, last_revision, None,
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# Drop the sequence # before caching
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self._merge_sorted_revisions_cache = [r[1:] for r in revs]
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filtered = self._filter_merge_sorted_revisions(
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self._merge_sorted_revisions_cache, start_revision_id,
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stop_revision_id, stop_rule)
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if direction == 'reverse':
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if direction == 'forward':
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return reversed(list(filtered))
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raise ValueError('invalid direction %r' % direction)
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def _filter_merge_sorted_revisions(self, merge_sorted_revisions,
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start_revision_id, stop_revision_id, stop_rule):
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"""Iterate over an inclusive range of sorted revisions."""
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rev_iter = iter(merge_sorted_revisions)
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if start_revision_id is not None:
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for rev_id, depth, revno, end_of_merge in rev_iter:
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if rev_id != start_revision_id:
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# The decision to include the start or not
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# depends on the stop_rule if a stop is provided
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iter([(rev_id, depth, revno, end_of_merge)]),
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if stop_revision_id is None:
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for rev_id, depth, revno, end_of_merge in rev_iter:
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yield rev_id, depth, revno, end_of_merge
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elif stop_rule == 'exclude':
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for rev_id, depth, revno, end_of_merge in rev_iter:
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if rev_id == stop_revision_id:
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yield rev_id, depth, revno, end_of_merge
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elif stop_rule == 'include':
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for rev_id, depth, revno, end_of_merge in rev_iter:
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yield rev_id, depth, revno, end_of_merge
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if rev_id == stop_revision_id:
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elif stop_rule == 'with-merges':
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stop_rev = self.repository.get_revision(stop_revision_id)
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if stop_rev.parent_ids:
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left_parent = stop_rev.parent_ids[0]
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left_parent = _mod_revision.NULL_REVISION
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for rev_id, depth, revno, end_of_merge in rev_iter:
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if rev_id == left_parent:
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yield rev_id, depth, revno, end_of_merge
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raise ValueError('invalid stop_rule %r' % stop_rule)
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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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if self.base == from_branch.base:
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symbol_versioning.warn(
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symbol_versioning.deprecated_in((1, 14, 0))
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% "pb parameter to fetch()")
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from_branch.lock_read()
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if last_revision is None:
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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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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_parent(self, url):
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"""See Branch.set_parent."""
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# TODO: Maybe delete old location files?
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# URLs should never be unicode, even on the local fs,
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# FIXUP this and get_parent in a future branch format bump:
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# read and rewrite the file. RBC 20060125
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if isinstance(url, unicode):
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url = url.encode('ascii')
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except UnicodeEncodeError:
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raise errors.InvalidURL(url,
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"Urls must be 7-bit ascii, "
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"use bzrlib.urlutils.escape")
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url = urlutils.relative_url(self.base, url)
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self._set_parent_location(url)
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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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if not self._format.supports_stacking():
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raise errors.UnstackableBranchFormat(self._format, self.base)
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self._check_stackable_repo()
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old_url = self.get_stacked_on_url()
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except (errors.NotStacked, errors.UnstackableBranchFormat,
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errors.UnstackableRepositoryFormat):
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# XXX: Lock correctness - should unlock our old repo if we were
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# repositories don't offer an interface to remove fallback
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# repositories today; take the conceptually simpler option and just
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self.repository = self.bzrdir.find_repository()
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self.repository.lock_write()
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# for every revision reference the branch has, ensure it is pulled
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source_repository = self._get_fallback_repository(old_url)
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for revision_id in chain([self.last_revision()],
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self.tags.get_reverse_tag_dict()):
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self.repository.fetch(source_repository, revision_id,
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self._activate_fallback_location(url, 'write')
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# write this out after the repository is stacked to avoid setting a
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# stacked config that doesn't work.
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self._set_config_location('stacked_on_location', url)
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def _set_tags_bytes(self, bytes):
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"""Mirror method for _get_tags_bytes.
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:seealso: Branch._get_tags_bytes.
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return _run_with_write_locked_target(self, self._transport.put_bytes,
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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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self._merge_sorted_revisions_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
707
should consider it to be private.
709
raise NotImplementedError(self._gen_revision_history)
712
def revision_history(self):
713
"""Return sequence of revision ids on this branch.
715
This method will cache the revision history for as long as it is safe to
718
if 'evil' in debug.debug_flags:
719
mutter_callsite(3, "revision_history scales with history.")
720
if self._revision_history_cache is not None:
721
history = self._revision_history_cache
723
history = self._gen_revision_history()
724
self._cache_revision_history(history)
728
"""Return current revision number for this branch.
730
That is equivalent to the number of revisions committed to
733
return self.last_revision_info()[0]
736
"""Older format branches cannot bind or unbind."""
737
raise errors.UpgradeRequired(self.base)
739
def set_append_revisions_only(self, enabled):
740
"""Older format branches are never restricted to append-only"""
741
raise errors.UpgradeRequired(self.base)
743
def last_revision(self):
744
"""Return last revision id, or NULL_REVISION."""
745
return self.last_revision_info()[1]
748
def last_revision_info(self):
749
"""Return information about the last revision.
751
:return: A tuple (revno, revision_id).
753
if self._last_revision_info_cache is None:
754
self._last_revision_info_cache = self._last_revision_info()
755
return self._last_revision_info_cache
757
def _last_revision_info(self):
758
rh = self.revision_history()
761
return (revno, rh[-1])
763
return (0, _mod_revision.NULL_REVISION)
765
@deprecated_method(deprecated_in((1, 6, 0)))
766
def missing_revisions(self, other, stop_revision=None):
767
"""Return a list of new revisions that would perfectly fit.
769
If self and other have not diverged, return a list of the revisions
770
present in other, but missing from self.
772
self_history = self.revision_history()
773
self_len = len(self_history)
774
other_history = other.revision_history()
775
other_len = len(other_history)
776
common_index = min(self_len, other_len) -1
777
if common_index >= 0 and \
778
self_history[common_index] != other_history[common_index]:
779
raise errors.DivergedBranches(self, other)
781
if stop_revision is None:
782
stop_revision = other_len
784
if stop_revision > other_len:
785
raise errors.NoSuchRevision(self, stop_revision)
786
return other_history[self_len:stop_revision]
789
def update_revisions(self, other, stop_revision=None, overwrite=False,
791
"""Pull in new perfect-fit revisions.
793
:param other: Another Branch to pull from
794
:param stop_revision: Updated until the given revision
795
:param overwrite: Always set the branch pointer, rather than checking
796
to see if it is a proper descendant.
797
:param graph: A Graph object that can be used to query history
798
information. This can be None.
801
return InterBranch.get(other, self).update_revisions(stop_revision,
804
def import_last_revision_info(self, source_repo, revno, revid):
805
"""Set the last revision info, importing from another repo if necessary.
807
This is used by the bound branch code to upload a revision to
808
the master branch first before updating the tip of the local branch.
810
:param source_repo: Source repository to optionally fetch from
811
:param revno: Revision number of the new tip
812
:param revid: Revision id of the new tip
814
if not self.repository.has_same_location(source_repo):
815
self.repository.fetch(source_repo, revision_id=revid)
816
self.set_last_revision_info(revno, revid)
818
def revision_id_to_revno(self, revision_id):
819
"""Given a revision id, return its revno"""
820
if _mod_revision.is_null(revision_id):
822
history = self.revision_history()
824
return history.index(revision_id) + 1
826
raise errors.NoSuchRevision(self, revision_id)
828
def get_rev_id(self, revno, history=None):
829
"""Find the revision id of the specified revno."""
831
return _mod_revision.NULL_REVISION
833
history = self.revision_history()
834
if revno <= 0 or revno > len(history):
835
raise errors.NoSuchRevision(self, revno)
836
return history[revno - 1]
838
def pull(self, source, overwrite=False, stop_revision=None,
839
possible_transports=None, _override_hook_target=None):
840
"""Mirror source into this branch.
842
This branch is considered to be 'local', having low latency.
844
:returns: PullResult instance
846
raise NotImplementedError(self.pull)
848
def push(self, target, overwrite=False, stop_revision=None):
849
"""Mirror this branch into target.
851
This branch is considered to be 'local', having low latency.
853
raise NotImplementedError(self.push)
855
def basis_tree(self):
856
"""Return `Tree` object for last revision."""
857
return self.repository.revision_tree(self.last_revision())
859
def get_parent(self):
860
"""Return the parent location of the branch.
862
This is the default location for pull/missing. The usual
863
pattern is that the user can override it by specifying a
866
parent = self._get_parent_location()
869
# This is an old-format absolute path to a local branch
871
if parent.startswith('/'):
872
parent = urlutils.local_path_to_url(parent.decode('utf8'))
874
return urlutils.join(self.base[:-1], parent)
875
except errors.InvalidURLJoin, e:
876
raise errors.InaccessibleParent(parent, self.base)
878
def _get_parent_location(self):
879
raise NotImplementedError(self._get_parent_location)
881
def _set_config_location(self, name, url, config=None,
882
make_relative=False):
884
config = self.get_config()
888
url = urlutils.relative_url(self.base, url)
889
config.set_user_option(name, url, warn_masked=True)
891
def _get_config_location(self, name, config=None):
893
config = self.get_config()
894
location = config.get_user_option(name)
899
def get_submit_branch(self):
900
"""Return the submit location of the branch.
902
This is the default location for bundle. The usual
903
pattern is that the user can override it by specifying a
906
return self.get_config().get_user_option('submit_branch')
908
def set_submit_branch(self, location):
909
"""Return the submit location of the branch.
911
This is the default location for bundle. The usual
912
pattern is that the user can override it by specifying a
915
self.get_config().set_user_option('submit_branch', location,
918
def get_public_branch(self):
919
"""Return the public location of the branch.
921
This is used by merge directives.
923
return self._get_config_location('public_branch')
925
def set_public_branch(self, location):
926
"""Return the submit location of the branch.
928
This is the default location for bundle. The usual
929
pattern is that the user can override it by specifying a
932
self._set_config_location('public_branch', location)
934
def get_push_location(self):
935
"""Return the None or the location to push this branch to."""
936
push_loc = self.get_config().get_user_option('push_location')
939
def set_push_location(self, location):
940
"""Set a new push location for this branch."""
941
raise NotImplementedError(self.set_push_location)
943
def _run_post_change_branch_tip_hooks(self, old_revno, old_revid):
944
"""Run the post_change_branch_tip hooks."""
945
hooks = Branch.hooks['post_change_branch_tip']
948
new_revno, new_revid = self.last_revision_info()
949
params = ChangeBranchTipParams(
950
self, old_revno, new_revno, old_revid, new_revid)
954
def _run_pre_change_branch_tip_hooks(self, new_revno, new_revid):
955
"""Run the pre_change_branch_tip hooks."""
956
hooks = Branch.hooks['pre_change_branch_tip']
959
old_revno, old_revid = self.last_revision_info()
960
params = ChangeBranchTipParams(
961
self, old_revno, new_revno, old_revid, new_revid)
965
except errors.TipChangeRejected:
968
exc_info = sys.exc_info()
969
hook_name = Branch.hooks.get_hook_name(hook)
970
raise errors.HookFailed(
971
'pre_change_branch_tip', hook_name, exc_info)
975
"""Synchronise this branch with the master branch if any.
977
:return: None or the last_revision pivoted out during the update.
981
def check_revno(self, revno):
983
Check whether a revno corresponds to any revision.
984
Zero (the NULL revision) is considered valid.
987
self.check_real_revno(revno)
989
def check_real_revno(self, revno):
991
Check whether a revno corresponds to a real revision.
992
Zero (the NULL revision) is considered invalid
994
if revno < 1 or revno > self.revno():
995
raise errors.InvalidRevisionNumber(revno)
998
def clone(self, to_bzrdir, revision_id=None, repository_policy=None):
999
"""Clone this branch into to_bzrdir preserving all semantic values.
1001
Most API users will want 'create_clone_on_transport', which creates a
1002
new bzrdir and branch on the fly.
1004
revision_id: if not None, the revision history in the new branch will
1005
be truncated to end with revision_id.
1007
result = to_bzrdir.create_branch()
1010
if repository_policy is not None:
1011
repository_policy.configure_branch(result)
1012
self.copy_content_into(result, revision_id=revision_id)
1018
def sprout(self, to_bzrdir, revision_id=None, repository_policy=None):
1019
"""Create a new line of development from the branch, into to_bzrdir.
1021
to_bzrdir controls the branch format.
1023
revision_id: if not None, the revision history in the new branch will
1024
be truncated to end with revision_id.
1026
result = to_bzrdir.create_branch()
1029
if repository_policy is not None:
1030
repository_policy.configure_branch(result)
1031
self.copy_content_into(result, revision_id=revision_id)
1032
result.set_parent(self.bzrdir.root_transport.base)
1037
def _synchronize_history(self, destination, revision_id):
1038
"""Synchronize last revision and revision history between branches.
1040
This version is most efficient when the destination is also a
1041
BzrBranch6, but works for BzrBranch5, as long as the destination's
1042
repository contains all the lefthand ancestors of the intended
1043
last_revision. If not, set_last_revision_info will fail.
1045
:param destination: The branch to copy the history into
1046
:param revision_id: The revision-id to truncate history at. May
1047
be None to copy complete history.
1049
source_revno, source_revision_id = self.last_revision_info()
1050
if revision_id is None:
1051
revno, revision_id = source_revno, source_revision_id
1052
elif source_revision_id == revision_id:
1053
# we know the revno without needing to walk all of history
1054
revno = source_revno
1056
# To figure out the revno for a random revision, we need to build
1057
# the revision history, and count its length.
1058
# We don't care about the order, just how long it is.
1059
# Alternatively, we could start at the current location, and count
1060
# backwards. But there is no guarantee that we will find it since
1061
# it may be a merged revision.
1062
revno = len(list(self.repository.iter_reverse_revision_history(
1064
destination.set_last_revision_info(revno, revision_id)
1067
def copy_content_into(self, destination, revision_id=None):
1068
"""Copy the content of self into destination.
1070
revision_id: if not None, the revision history in the new branch will
1071
be truncated to end with revision_id.
1073
self._synchronize_history(destination, revision_id)
1075
parent = self.get_parent()
1076
except errors.InaccessibleParent, e:
1077
mutter('parent was not accessible to copy: %s', e)
1080
destination.set_parent(parent)
1081
if self._push_should_merge_tags():
1082
self.tags.merge_to(destination.tags)
1086
"""Check consistency of the branch.
1088
In particular this checks that revisions given in the revision-history
1089
do actually match up in the revision graph, and that they're all
1090
present in the repository.
1092
Callers will typically also want to check the repository.
1094
:return: A BranchCheckResult.
1096
mainline_parent_id = None
1097
last_revno, last_revision_id = self.last_revision_info()
1098
real_rev_history = list(self.repository.iter_reverse_revision_history(
1100
real_rev_history.reverse()
1101
if len(real_rev_history) != last_revno:
1102
raise errors.BzrCheckError('revno does not match len(mainline)'
1103
' %s != %s' % (last_revno, len(real_rev_history)))
1104
# TODO: We should probably also check that real_rev_history actually
1105
# matches self.revision_history()
1106
for revision_id in real_rev_history:
1108
revision = self.repository.get_revision(revision_id)
1109
except errors.NoSuchRevision, e:
1110
raise errors.BzrCheckError("mainline revision {%s} not in repository"
1112
# In general the first entry on the revision history has no parents.
1113
# But it's not illegal for it to have parents listed; this can happen
1114
# in imports from Arch when the parents weren't reachable.
1115
if mainline_parent_id is not None:
1116
if mainline_parent_id not in revision.parent_ids:
1117
raise errors.BzrCheckError("previous revision {%s} not listed among "
1119
% (mainline_parent_id, revision_id))
1120
mainline_parent_id = revision_id
1121
return BranchCheckResult(self)
1123
def _get_checkout_format(self):
1124
"""Return the most suitable metadir for a checkout of this branch.
1125
Weaves are used if this branch's repository uses weaves.
1127
if isinstance(self.bzrdir, bzrdir.BzrDirPreSplitOut):
1128
from bzrlib.repofmt import weaverepo
1129
format = bzrdir.BzrDirMetaFormat1()
1130
format.repository_format = weaverepo.RepositoryFormat7()
1132
format = self.repository.bzrdir.checkout_metadir()
1133
format.set_branch_format(self._format)
1136
def create_clone_on_transport(self, to_transport, revision_id=None,
1137
stacked_on=None, create_prefix=False, use_existing_dir=False):
1138
"""Create a clone of this branch and its bzrdir.
1140
:param to_transport: The transport to clone onto.
1141
:param revision_id: The revision id to use as tip in the new branch.
1142
If None the tip is obtained from this branch.
1143
:param stacked_on: An optional URL to stack the clone on.
1144
:param create_prefix: Create any missing directories leading up to
1146
:param use_existing_dir: Use an existing directory if one exists.
1148
# The destination doesn't exist; create it.
1149
# XXX: Refactor the create_prefix/no_create_prefix code into a
1150
# common helper function
1152
def make_directory(transport):
1153
transport.mkdir('.')
1156
def redirected(transport, e, redirection_notice):
1157
note(redirection_notice)
1158
return transport._redirected_to(e.source, e.target)
1161
to_transport = transport.do_catching_redirections(
1162
make_directory, to_transport, redirected)
1163
except errors.FileExists:
1164
if not use_existing_dir:
1165
raise errors.BzrCommandError("Target directory %s"
1166
" already exists, but does not have a valid .bzr"
1167
" directory. Supply --use-existing-dir to push"
1168
" there anyway." % to_transport.base)
1169
except errors.NoSuchFile:
1170
if not create_prefix:
1171
raise errors.BzrCommandError("Parent directory of %s"
1173
"\nYou may supply --create-prefix to create all"
1174
" leading parent directories."
1175
% to_transport.base)
1176
to_transport.create_prefix()
1177
except errors.TooManyRedirections:
1178
raise errors.BzrCommandError("Too many redirections trying "
1179
"to make %s." % to_transport.base)
1181
# Now the target directory exists, but doesn't have a .bzr
1182
# directory. So we need to create it, along with any work to create
1183
# all of the dependent branches, etc.
1184
# XXX: Fix the bzrdir API to allow getting the branch back from the
1185
# clone call. Or something. 20090224 RBC/spiv.
1186
if revision_id is None:
1187
revision_id = self.last_revision()
1188
dir_to = self.bzrdir.clone_on_transport(to_transport,
1189
revision_id=revision_id, stacked_on=stacked_on)
1190
return dir_to.open_branch()
1192
def create_checkout(self, to_location, revision_id=None,
1193
lightweight=False, accelerator_tree=None,
1195
"""Create a checkout of a branch.
1197
:param to_location: The url to produce the checkout at
1198
:param revision_id: The revision to check out
1199
:param lightweight: If True, produce a lightweight checkout, otherwise,
1200
produce a bound branch (heavyweight checkout)
1201
:param accelerator_tree: A tree which can be used for retrieving file
1202
contents more quickly than the revision tree, i.e. a workingtree.
1203
The revision tree will be used for cases where accelerator_tree's
1204
content is different.
1205
:param hardlink: If true, hard-link files from accelerator_tree,
1207
:return: The tree of the created checkout
1209
t = transport.get_transport(to_location)
1212
format = self._get_checkout_format()
1213
checkout = format.initialize_on_transport(t)
1214
from_branch = BranchReferenceFormat().initialize(checkout, self)
1216
format = self._get_checkout_format()
1217
checkout_branch = bzrdir.BzrDir.create_branch_convenience(
1218
to_location, force_new_tree=False, format=format)
1219
checkout = checkout_branch.bzrdir
1220
checkout_branch.bind(self)
1221
# pull up to the specified revision_id to set the initial
1222
# branch tip correctly, and seed it with history.
1223
checkout_branch.pull(self, stop_revision=revision_id)
1225
tree = checkout.create_workingtree(revision_id,
1226
from_branch=from_branch,
1227
accelerator_tree=accelerator_tree,
1229
basis_tree = tree.basis_tree()
1230
basis_tree.lock_read()
1232
for path, file_id in basis_tree.iter_references():
1233
reference_parent = self.reference_parent(file_id, path)
1234
reference_parent.create_checkout(tree.abspath(path),
1235
basis_tree.get_reference_revision(file_id, path),
1242
def reconcile(self, thorough=True):
1243
"""Make sure the data stored in this branch is consistent."""
1244
from bzrlib.reconcile import BranchReconciler
1245
reconciler = BranchReconciler(self, thorough=thorough)
1246
reconciler.reconcile()
1249
def reference_parent(self, file_id, path):
1250
"""Return the parent branch for a tree-reference file_id
1251
:param file_id: The file_id of the tree reference
1252
:param path: The path of the file_id in the tree
1253
:return: A branch associated with the file_id
1255
# FIXME should provide multiple branches, based on config
1256
return Branch.open(self.bzrdir.root_transport.clone(path).base)
1258
def supports_tags(self):
1259
return self._format.supports_tags()
1261
def _check_if_descendant_or_diverged(self, revision_a, revision_b, graph,
1263
"""Ensure that revision_b is a descendant of revision_a.
1265
This is a helper function for update_revisions.
1267
:raises: DivergedBranches if revision_b has diverged from revision_a.
1268
:returns: True if revision_b is a descendant of revision_a.
1270
relation = self._revision_relations(revision_a, revision_b, graph)
1271
if relation == 'b_descends_from_a':
1273
elif relation == 'diverged':
1274
raise errors.DivergedBranches(self, other_branch)
1275
elif relation == 'a_descends_from_b':
1278
raise AssertionError("invalid relation: %r" % (relation,))
1280
def _revision_relations(self, revision_a, revision_b, graph):
1281
"""Determine the relationship between two revisions.
1283
:returns: One of: 'a_descends_from_b', 'b_descends_from_a', 'diverged'
1285
heads = graph.heads([revision_a, revision_b])
1286
if heads == set([revision_b]):
1287
return 'b_descends_from_a'
1288
elif heads == set([revision_a, revision_b]):
1289
# These branches have diverged
1291
elif heads == set([revision_a]):
1292
return 'a_descends_from_b'
1294
raise AssertionError("invalid heads: %r" % (heads,))
1297
class BranchFormat(object):
1298
"""An encapsulation of the initialization and open routines for a format.
1300
Formats provide three things:
1301
* An initialization routine,
1305
Formats are placed in an dict by their format string for reference
1306
during branch opening. Its not required that these be instances, they
1307
can be classes themselves with class methods - it simply depends on
1308
whether state is needed for a given format or not.
1310
Once a format is deprecated, just deprecate the initialize and open
1311
methods on the format class. Do not deprecate the object, as the
1312
object will be created every time regardless.
1315
_default_format = None
1316
"""The default format used for new branches."""
1319
"""The known formats."""
1321
def __eq__(self, other):
1322
return self.__class__ is other.__class__
1324
def __ne__(self, other):
1325
return not (self == other)
1328
def find_format(klass, a_bzrdir):
1329
"""Return the format for the branch object in a_bzrdir."""
1331
transport = a_bzrdir.get_branch_transport(None)
1332
format_string = transport.get("format").read()
1333
return klass._formats[format_string]
1334
except errors.NoSuchFile:
1335
raise errors.NotBranchError(path=transport.base)
1337
raise errors.UnknownFormatError(format=format_string, kind='branch')
1340
def get_default_format(klass):
1341
"""Return the current default format."""
1342
return klass._default_format
1344
def get_reference(self, a_bzrdir):
1345
"""Get the target reference of the branch in a_bzrdir.
1347
format probing must have been completed before calling
1348
this method - it is assumed that the format of the branch
1349
in a_bzrdir is correct.
1351
:param a_bzrdir: The bzrdir to get the branch data from.
1352
:return: None if the branch is not a reference branch.
1357
def set_reference(self, a_bzrdir, to_branch):
1358
"""Set the target reference of the branch in a_bzrdir.
1360
format probing must have been completed before calling
1361
this method - it is assumed that the format of the branch
1362
in a_bzrdir is correct.
1364
:param a_bzrdir: The bzrdir to set the branch reference for.
1365
:param to_branch: branch that the checkout is to reference
1367
raise NotImplementedError(self.set_reference)
1369
def get_format_string(self):
1370
"""Return the ASCII format string that identifies this format."""
1371
raise NotImplementedError(self.get_format_string)
1373
def get_format_description(self):
1374
"""Return the short format description for this format."""
1375
raise NotImplementedError(self.get_format_description)
1377
def _initialize_helper(self, a_bzrdir, utf8_files, lock_type='metadir',
1379
"""Initialize a branch in a bzrdir, with specified files
1381
:param a_bzrdir: The bzrdir to initialize the branch in
1382
:param utf8_files: The files to create as a list of
1383
(filename, content) tuples
1384
:param set_format: If True, set the format with
1385
self.get_format_string. (BzrBranch4 has its format set
1387
:return: a branch in this format
1389
mutter('creating branch %r in %s', self, a_bzrdir.transport.base)
1390
branch_transport = a_bzrdir.get_branch_transport(self)
1392
'metadir': ('lock', lockdir.LockDir),
1393
'branch4': ('branch-lock', lockable_files.TransportLock),
1395
lock_name, lock_class = lock_map[lock_type]
1396
control_files = lockable_files.LockableFiles(branch_transport,
1397
lock_name, lock_class)
1398
control_files.create_lock()
1399
control_files.lock_write()
1401
utf8_files += [('format', self.get_format_string())]
1403
for (filename, content) in utf8_files:
1404
branch_transport.put_bytes(
1406
mode=a_bzrdir._get_file_mode())
1408
control_files.unlock()
1409
return self.open(a_bzrdir, _found=True)
1411
def initialize(self, a_bzrdir):
1412
"""Create a branch of this format in a_bzrdir."""
1413
raise NotImplementedError(self.initialize)
1415
def is_supported(self):
1416
"""Is this format supported?
1418
Supported formats can be initialized and opened.
1419
Unsupported formats may not support initialization or committing or
1420
some other features depending on the reason for not being supported.
1424
def make_tags(self, branch):
1425
"""Create a tags object for branch.
1427
This method is on BranchFormat, because BranchFormats are reflected
1428
over the wire via network_name(), whereas full Branch instances require
1429
multiple VFS method calls to operate at all.
1431
The default implementation returns a disabled-tags instance.
1433
Note that it is normal for branch to be a RemoteBranch when using tags
1436
return DisabledTags(branch)
1438
def network_name(self):
1439
"""A simple byte string uniquely identifying this format for RPC calls.
1441
MetaDir branch formats use their disk format string to identify the
1442
repository over the wire. All in one formats such as bzr < 0.8, and
1443
foreign formats like svn/git and hg should use some marker which is
1444
unique and immutable.
1446
raise NotImplementedError(self.network_name)
1448
def open(self, a_bzrdir, _found=False, ignore_fallbacks=False):
1449
"""Return the branch object for a_bzrdir
1451
:param a_bzrdir: A BzrDir that contains a branch.
1452
:param _found: a private parameter, do not use it. It is used to
1453
indicate if format probing has already be done.
1454
:param ignore_fallbacks: when set, no fallback branches will be opened
1455
(if there are any). Default is to open fallbacks.
1457
raise NotImplementedError(self.open)
1460
def register_format(klass, format):
1461
"""Register a metadir format."""
1462
klass._formats[format.get_format_string()] = format
1463
# Metadir formats have a network name of their format string, and get
1464
# registered as class factories.
1465
network_format_registry.register(format.get_format_string(), format.__class__)
1468
def set_default_format(klass, format):
1469
klass._default_format = format
1471
def supports_stacking(self):
1472
"""True if this format records a stacked-on branch."""
1476
def unregister_format(klass, format):
1477
del klass._formats[format.get_format_string()]
1480
return self.get_format_description().rstrip()
1482
def supports_tags(self):
1483
"""True if this format supports tags stored in the branch"""
1484
return False # by default
1487
class BranchHooks(Hooks):
1488
"""A dictionary mapping hook name to a list of callables for branch hooks.
1490
e.g. ['set_rh'] Is the list of items to be called when the
1491
set_revision_history function is invoked.
1495
"""Create the default hooks.
1497
These are all empty initially, because by default nothing should get
1500
Hooks.__init__(self)
1501
self.create_hook(HookPoint('set_rh',
1502
"Invoked whenever the revision history has been set via "
1503
"set_revision_history. The api signature is (branch, "
1504
"revision_history), and the branch will be write-locked. "
1505
"The set_rh hook can be expensive for bzr to trigger, a better "
1506
"hook to use is Branch.post_change_branch_tip.", (0, 15), None))
1507
self.create_hook(HookPoint('open',
1508
"Called with the Branch object that has been opened after a "
1509
"branch is opened.", (1, 8), None))
1510
self.create_hook(HookPoint('post_push',
1511
"Called after a push operation completes. post_push is called "
1512
"with a bzrlib.branch.BranchPushResult object and only runs in the "
1513
"bzr client.", (0, 15), None))
1514
self.create_hook(HookPoint('post_pull',
1515
"Called after a pull operation completes. post_pull is called "
1516
"with a bzrlib.branch.PullResult object and only runs in the "
1517
"bzr client.", (0, 15), None))
1518
self.create_hook(HookPoint('pre_commit',
1519
"Called after a commit is calculated but before it is is "
1520
"completed. pre_commit is called with (local, master, old_revno, "
1521
"old_revid, future_revno, future_revid, tree_delta, future_tree"
1522
"). old_revid is NULL_REVISION for the first commit to a branch, "
1523
"tree_delta is a TreeDelta object describing changes from the "
1524
"basis revision. hooks MUST NOT modify this delta. "
1525
" future_tree is an in-memory tree obtained from "
1526
"CommitBuilder.revision_tree() and hooks MUST NOT modify this "
1527
"tree.", (0,91), None))
1528
self.create_hook(HookPoint('post_commit',
1529
"Called in the bzr client after a commit has completed. "
1530
"post_commit is called with (local, master, old_revno, old_revid, "
1531
"new_revno, new_revid). old_revid is NULL_REVISION for the first "
1532
"commit to a branch.", (0, 15), None))
1533
self.create_hook(HookPoint('post_uncommit',
1534
"Called in the bzr client after an uncommit completes. "
1535
"post_uncommit is called with (local, master, old_revno, "
1536
"old_revid, new_revno, new_revid) where local is the local branch "
1537
"or None, master is the target branch, and an empty branch "
1538
"receives new_revno of 0, new_revid of None.", (0, 15), None))
1539
self.create_hook(HookPoint('pre_change_branch_tip',
1540
"Called in bzr client and server before a change to the tip of a "
1541
"branch is made. pre_change_branch_tip is called with a "
1542
"bzrlib.branch.ChangeBranchTipParams. Note that push, pull, "
1543
"commit, uncommit will all trigger this hook.", (1, 6), None))
1544
self.create_hook(HookPoint('post_change_branch_tip',
1545
"Called in bzr client and server after a change to the tip of a "
1546
"branch is made. post_change_branch_tip is called with a "
1547
"bzrlib.branch.ChangeBranchTipParams. Note that push, pull, "
1548
"commit, uncommit will all trigger this hook.", (1, 4), None))
1549
self.create_hook(HookPoint('transform_fallback_location',
1550
"Called when a stacked branch is activating its fallback "
1551
"locations. transform_fallback_location is called with (branch, "
1552
"url), and should return a new url. Returning the same url "
1553
"allows it to be used as-is, returning a different one can be "
1554
"used to cause the branch to stack on a closer copy of that "
1555
"fallback_location. Note that the branch cannot have history "
1556
"accessing methods called on it during this hook because the "
1557
"fallback locations have not been activated. When there are "
1558
"multiple hooks installed for transform_fallback_location, "
1559
"all are called with the url returned from the previous hook."
1560
"The order is however undefined.", (1, 9), None))
1563
# install the default hooks into the Branch class.
1564
Branch.hooks = BranchHooks()
1567
class ChangeBranchTipParams(object):
1568
"""Object holding parameters passed to *_change_branch_tip hooks.
1570
There are 5 fields that hooks may wish to access:
1572
:ivar branch: the branch being changed
1573
:ivar old_revno: revision number before the change
1574
:ivar new_revno: revision number after the change
1575
:ivar old_revid: revision id before the change
1576
:ivar new_revid: revision id after the change
1578
The revid fields are strings. The revno fields are integers.
1581
def __init__(self, branch, old_revno, new_revno, old_revid, new_revid):
1582
"""Create a group of ChangeBranchTip parameters.
1584
:param branch: The branch being changed.
1585
:param old_revno: Revision number before the change.
1586
:param new_revno: Revision number after the change.
1587
:param old_revid: Tip revision id before the change.
1588
:param new_revid: Tip revision id after the change.
1590
self.branch = branch
1591
self.old_revno = old_revno
1592
self.new_revno = new_revno
1593
self.old_revid = old_revid
1594
self.new_revid = new_revid
1596
def __eq__(self, other):
1597
return self.__dict__ == other.__dict__
1600
return "<%s of %s from (%s, %s) to (%s, %s)>" % (
1601
self.__class__.__name__, self.branch,
1602
self.old_revno, self.old_revid, self.new_revno, self.new_revid)
1605
class BzrBranchFormat4(BranchFormat):
1606
"""Bzr branch format 4.
1609
- a revision-history file.
1610
- a branch-lock lock file [ to be shared with the bzrdir ]
1613
def get_format_description(self):
1614
"""See BranchFormat.get_format_description()."""
1615
return "Branch format 4"
1617
def initialize(self, a_bzrdir):
1618
"""Create a branch of this format in a_bzrdir."""
1619
utf8_files = [('revision-history', ''),
1620
('branch-name', ''),
1622
return self._initialize_helper(a_bzrdir, utf8_files,
1623
lock_type='branch4', set_format=False)
1626
super(BzrBranchFormat4, self).__init__()
1627
self._matchingbzrdir = bzrdir.BzrDirFormat6()
1629
def network_name(self):
1630
"""The network name for this format is the control dirs disk label."""
1631
return self._matchingbzrdir.get_format_string()
1633
def open(self, a_bzrdir, _found=False, ignore_fallbacks=False):
1634
"""See BranchFormat.open()."""
1636
# we are being called directly and must probe.
1637
raise NotImplementedError
1638
return BzrBranch(_format=self,
1639
_control_files=a_bzrdir._control_files,
1641
_repository=a_bzrdir.open_repository())
1644
return "Bazaar-NG branch format 4"
1647
class BranchFormatMetadir(BranchFormat):
1648
"""Common logic for meta-dir based branch formats."""
1650
def _branch_class(self):
1651
"""What class to instantiate on open calls."""
1652
raise NotImplementedError(self._branch_class)
1654
def network_name(self):
1655
"""A simple byte string uniquely identifying this format for RPC calls.
1657
Metadir branch formats use their format string.
1659
return self.get_format_string()
1661
def open(self, a_bzrdir, _found=False, ignore_fallbacks=False):
1662
"""See BranchFormat.open()."""
1664
format = BranchFormat.find_format(a_bzrdir)
1665
if format.__class__ != self.__class__:
1666
raise AssertionError("wrong format %r found for %r" %
1669
transport = a_bzrdir.get_branch_transport(None)
1670
control_files = lockable_files.LockableFiles(transport, 'lock',
1672
return self._branch_class()(_format=self,
1673
_control_files=control_files,
1675
_repository=a_bzrdir.find_repository(),
1676
ignore_fallbacks=ignore_fallbacks)
1677
except errors.NoSuchFile:
1678
raise errors.NotBranchError(path=transport.base)
1681
super(BranchFormatMetadir, self).__init__()
1682
self._matchingbzrdir = bzrdir.BzrDirMetaFormat1()
1683
self._matchingbzrdir.set_branch_format(self)
1685
def supports_tags(self):
1689
class BzrBranchFormat5(BranchFormatMetadir):
1690
"""Bzr branch format 5.
1693
- a revision-history file.
1695
- a lock dir guarding the branch itself
1696
- all of this stored in a branch/ subdirectory
1697
- works with shared repositories.
1699
This format is new in bzr 0.8.
1702
def _branch_class(self):
1705
def get_format_string(self):
1706
"""See BranchFormat.get_format_string()."""
1707
return "Bazaar-NG branch format 5\n"
1709
def get_format_description(self):
1710
"""See BranchFormat.get_format_description()."""
1711
return "Branch format 5"
1713
def initialize(self, a_bzrdir):
1714
"""Create a branch of this format in a_bzrdir."""
1715
utf8_files = [('revision-history', ''),
1716
('branch-name', ''),
1718
return self._initialize_helper(a_bzrdir, utf8_files)
1720
def supports_tags(self):
1724
class BzrBranchFormat6(BranchFormatMetadir):
1725
"""Branch format with last-revision and tags.
1727
Unlike previous formats, this has no explicit revision history. Instead,
1728
this just stores the last-revision, and the left-hand history leading
1729
up to there is the history.
1731
This format was introduced in bzr 0.15
1732
and became the default in 0.91.
1735
def _branch_class(self):
1738
def get_format_string(self):
1739
"""See BranchFormat.get_format_string()."""
1740
return "Bazaar Branch Format 6 (bzr 0.15)\n"
1742
def get_format_description(self):
1743
"""See BranchFormat.get_format_description()."""
1744
return "Branch format 6"
1746
def initialize(self, a_bzrdir):
1747
"""Create a branch of this format in a_bzrdir."""
1748
utf8_files = [('last-revision', '0 null:\n'),
1749
('branch.conf', ''),
1752
return self._initialize_helper(a_bzrdir, utf8_files)
1754
def make_tags(self, branch):
1755
"""See bzrlib.branch.BranchFormat.make_tags()."""
1756
return BasicTags(branch)
1760
class BzrBranchFormat7(BranchFormatMetadir):
1761
"""Branch format with last-revision, tags, and a stacked location pointer.
1763
The stacked location pointer is passed down to the repository and requires
1764
a repository format with supports_external_lookups = True.
1766
This format was introduced in bzr 1.6.
1769
def _branch_class(self):
1772
def get_format_string(self):
1773
"""See BranchFormat.get_format_string()."""
1774
return "Bazaar Branch Format 7 (needs bzr 1.6)\n"
1776
def get_format_description(self):
1777
"""See BranchFormat.get_format_description()."""
1778
return "Branch format 7"
1780
def initialize(self, a_bzrdir):
1781
"""Create a branch of this format in a_bzrdir."""
1782
utf8_files = [('last-revision', '0 null:\n'),
1783
('branch.conf', ''),
1786
return self._initialize_helper(a_bzrdir, utf8_files)
1789
super(BzrBranchFormat7, self).__init__()
1790
self._matchingbzrdir.repository_format = \
1791
RepositoryFormatKnitPack5RichRoot()
1793
def make_tags(self, branch):
1794
"""See bzrlib.branch.BranchFormat.make_tags()."""
1795
return BasicTags(branch)
1797
def supports_stacking(self):
1801
class BranchReferenceFormat(BranchFormat):
1802
"""Bzr branch reference format.
1804
Branch references are used in implementing checkouts, they
1805
act as an alias to the real branch which is at some other url.
1812
def get_format_string(self):
1813
"""See BranchFormat.get_format_string()."""
1814
return "Bazaar-NG Branch Reference Format 1\n"
1816
def get_format_description(self):
1817
"""See BranchFormat.get_format_description()."""
1818
return "Checkout reference format 1"
1820
def get_reference(self, a_bzrdir):
1821
"""See BranchFormat.get_reference()."""
1822
transport = a_bzrdir.get_branch_transport(None)
1823
return transport.get('location').read()
1825
def set_reference(self, a_bzrdir, to_branch):
1826
"""See BranchFormat.set_reference()."""
1827
transport = a_bzrdir.get_branch_transport(None)
1828
location = transport.put_bytes('location', to_branch.base)
1830
def initialize(self, a_bzrdir, target_branch=None):
1831
"""Create a branch of this format in a_bzrdir."""
1832
if target_branch is None:
1833
# this format does not implement branch itself, thus the implicit
1834
# creation contract must see it as uninitializable
1835
raise errors.UninitializableFormat(self)
1836
mutter('creating branch reference in %s', a_bzrdir.transport.base)
1837
branch_transport = a_bzrdir.get_branch_transport(self)
1838
branch_transport.put_bytes('location',
1839
target_branch.bzrdir.root_transport.base)
1840
branch_transport.put_bytes('format', self.get_format_string())
1842
a_bzrdir, _found=True,
1843
possible_transports=[target_branch.bzrdir.root_transport])
1846
super(BranchReferenceFormat, self).__init__()
1847
self._matchingbzrdir = bzrdir.BzrDirMetaFormat1()
1848
self._matchingbzrdir.set_branch_format(self)
1850
def _make_reference_clone_function(format, a_branch):
1851
"""Create a clone() routine for a branch dynamically."""
1852
def clone(to_bzrdir, revision_id=None,
1853
repository_policy=None):
1854
"""See Branch.clone()."""
1855
return format.initialize(to_bzrdir, a_branch)
1856
# cannot obey revision_id limits when cloning a reference ...
1857
# FIXME RBC 20060210 either nuke revision_id for clone, or
1858
# emit some sort of warning/error to the caller ?!
1861
def open(self, a_bzrdir, _found=False, location=None,
1862
possible_transports=None, ignore_fallbacks=False):
1863
"""Return the branch that the branch reference in a_bzrdir points at.
1865
:param a_bzrdir: A BzrDir that contains a branch.
1866
:param _found: a private parameter, do not use it. It is used to
1867
indicate if format probing has already be done.
1868
:param ignore_fallbacks: when set, no fallback branches will be opened
1869
(if there are any). Default is to open fallbacks.
1870
:param location: The location of the referenced branch. If
1871
unspecified, this will be determined from the branch reference in
1873
:param possible_transports: An optional reusable transports list.
1876
format = BranchFormat.find_format(a_bzrdir)
1877
if format.__class__ != self.__class__:
1878
raise AssertionError("wrong format %r found for %r" %
1880
if location is None:
1881
location = self.get_reference(a_bzrdir)
1882
real_bzrdir = bzrdir.BzrDir.open(
1883
location, possible_transports=possible_transports)
1884
result = real_bzrdir.open_branch(ignore_fallbacks=ignore_fallbacks)
1885
# this changes the behaviour of result.clone to create a new reference
1886
# rather than a copy of the content of the branch.
1887
# I did not use a proxy object because that needs much more extensive
1888
# testing, and we are only changing one behaviour at the moment.
1889
# If we decide to alter more behaviours - i.e. the implicit nickname
1890
# then this should be refactored to introduce a tested proxy branch
1891
# and a subclass of that for use in overriding clone() and ....
1893
result.clone = self._make_reference_clone_function(result)
1897
network_format_registry = registry.FormatRegistry()
1898
"""Registry of formats indexed by their network name.
1900
The network name for a branch format is an identifier that can be used when
1901
referring to formats with smart server operations. See
1902
BranchFormat.network_name() for more detail.
1906
# formats which have no format string are not discoverable
1907
# and not independently creatable, so are not registered.
1908
__format5 = BzrBranchFormat5()
1909
__format6 = BzrBranchFormat6()
1910
__format7 = BzrBranchFormat7()
1911
BranchFormat.register_format(__format5)
1912
BranchFormat.register_format(BranchReferenceFormat())
1913
BranchFormat.register_format(__format6)
1914
BranchFormat.register_format(__format7)
1915
BranchFormat.set_default_format(__format6)
1916
_legacy_formats = [BzrBranchFormat4(),
1918
network_format_registry.register(
1919
_legacy_formats[0].network_name(), _legacy_formats[0].__class__)
1922
class BzrBranch(Branch):
1923
"""A branch stored in the actual filesystem.
1925
Note that it's "local" in the context of the filesystem; it doesn't
1926
really matter if it's on an nfs/smb/afs/coda/... share, as long as
1927
it's writable, and can be accessed via the normal filesystem API.
1929
:ivar _transport: Transport for file operations on this branch's
1930
control files, typically pointing to the .bzr/branch directory.
1931
:ivar repository: Repository for this branch.
1932
:ivar base: The url of the base directory for this branch; the one
1933
containing the .bzr directory.
1936
def __init__(self, _format=None,
1937
_control_files=None, a_bzrdir=None, _repository=None,
1938
ignore_fallbacks=False):
1939
"""Create new branch object at a particular location."""
1940
if a_bzrdir is None:
1941
raise ValueError('a_bzrdir must be supplied')
1943
self.bzrdir = a_bzrdir
1944
self._base = self.bzrdir.transport.clone('..').base
1945
# XXX: We should be able to just do
1946
# self.base = self.bzrdir.root_transport.base
1947
# but this does not quite work yet -- mbp 20080522
1948
self._format = _format
1949
if _control_files is None:
1950
raise ValueError('BzrBranch _control_files is None')
1951
self.control_files = _control_files
1952
self._transport = _control_files._transport
1953
self.repository = _repository
1954
Branch.__init__(self)
1957
return '%s(%r)' % (self.__class__.__name__, self.base)
1961
def _get_base(self):
1962
"""Returns the directory containing the control directory."""
1965
base = property(_get_base, doc="The URL for the root of this branch.")
1967
def _get_config(self):
1968
return TransportConfig(self._transport, 'branch.conf')
1970
def is_locked(self):
1971
return self.control_files.is_locked()
1973
def lock_write(self, token=None):
1974
# All-in-one needs to always unlock/lock.
1975
repo_control = getattr(self.repository, 'control_files', None)
1976
if self.control_files == repo_control or not self.is_locked():
1977
self.repository.lock_write()
1982
return self.control_files.lock_write(token=token)
1985
self.repository.unlock()
1988
def lock_read(self):
1989
# All-in-one needs to always unlock/lock.
1990
repo_control = getattr(self.repository, 'control_files', None)
1991
if self.control_files == repo_control or not self.is_locked():
1992
self.repository.lock_read()
1997
self.control_files.lock_read()
2000
self.repository.unlock()
2005
self.control_files.unlock()
2007
# All-in-one needs to always unlock/lock.
2008
repo_control = getattr(self.repository, 'control_files', None)
2009
if (self.control_files == repo_control or
2010
not self.control_files.is_locked()):
2011
self.repository.unlock()
2012
if not self.control_files.is_locked():
2013
# we just released the lock
2014
self._clear_cached_state()
2016
def peek_lock_mode(self):
2017
if self.control_files._lock_count == 0:
2020
return self.control_files._lock_mode
2022
def get_physical_lock_status(self):
2023
return self.control_files.get_physical_lock_status()
2026
def print_file(self, file, revision_id):
2027
"""See Branch.print_file."""
2028
return self.repository.print_file(file, revision_id)
2030
def _write_revision_history(self, history):
2031
"""Factored out of set_revision_history.
2033
This performs the actual writing to disk.
2034
It is intended to be called by BzrBranch5.set_revision_history."""
2035
self._transport.put_bytes(
2036
'revision-history', '\n'.join(history),
2037
mode=self.bzrdir._get_file_mode())
2040
def set_revision_history(self, rev_history):
2041
"""See Branch.set_revision_history."""
2042
if 'evil' in debug.debug_flags:
2043
mutter_callsite(3, "set_revision_history scales with history.")
2044
check_not_reserved_id = _mod_revision.check_not_reserved_id
2045
for rev_id in rev_history:
2046
check_not_reserved_id(rev_id)
2047
if Branch.hooks['post_change_branch_tip']:
2048
# Don't calculate the last_revision_info() if there are no hooks
2050
old_revno, old_revid = self.last_revision_info()
2051
if len(rev_history) == 0:
2052
revid = _mod_revision.NULL_REVISION
2054
revid = rev_history[-1]
2055
self._run_pre_change_branch_tip_hooks(len(rev_history), revid)
2056
self._write_revision_history(rev_history)
2057
self._clear_cached_state()
2058
self._cache_revision_history(rev_history)
2059
for hook in Branch.hooks['set_rh']:
2060
hook(self, rev_history)
2061
if Branch.hooks['post_change_branch_tip']:
2062
self._run_post_change_branch_tip_hooks(old_revno, old_revid)
2064
def _synchronize_history(self, destination, revision_id):
2065
"""Synchronize last revision and revision history between branches.
2067
This version is most efficient when the destination is also a
2068
BzrBranch5, but works for BzrBranch6 as long as the revision
2069
history is the true lefthand parent history, and all of the revisions
2070
are in the destination's repository. If not, set_revision_history
2073
:param destination: The branch to copy the history into
2074
:param revision_id: The revision-id to truncate history at. May
2075
be None to copy complete history.
2077
if not isinstance(destination._format, BzrBranchFormat5):
2078
super(BzrBranch, self)._synchronize_history(
2079
destination, revision_id)
2081
if revision_id == _mod_revision.NULL_REVISION:
2084
new_history = self.revision_history()
2085
if revision_id is not None and new_history != []:
2087
new_history = new_history[:new_history.index(revision_id) + 1]
2089
rev = self.repository.get_revision(revision_id)
2090
new_history = rev.get_history(self.repository)[1:]
2091
destination.set_revision_history(new_history)
2094
def set_last_revision_info(self, revno, revision_id):
2095
"""Set the last revision of this branch.
2097
The caller is responsible for checking that the revno is correct
2098
for this revision id.
2100
It may be possible to set the branch last revision to an id not
2101
present in the repository. However, branches can also be
2102
configured to check constraints on history, in which case this may not
2105
revision_id = _mod_revision.ensure_null(revision_id)
2106
# this old format stores the full history, but this api doesn't
2107
# provide it, so we must generate, and might as well check it's
2109
history = self._lefthand_history(revision_id)
2110
if len(history) != revno:
2111
raise AssertionError('%d != %d' % (len(history), revno))
2112
self.set_revision_history(history)
2114
def _gen_revision_history(self):
2115
history = self._transport.get_bytes('revision-history').split('\n')
2116
if history[-1:] == ['']:
2117
# There shouldn't be a trailing newline, but just in case.
2122
def generate_revision_history(self, revision_id, last_rev=None,
2124
"""Create a new revision history that will finish with revision_id.
2126
:param revision_id: the new tip to use.
2127
:param last_rev: The previous last_revision. If not None, then this
2128
must be a ancestory of revision_id, or DivergedBranches is raised.
2129
:param other_branch: The other branch that DivergedBranches should
2130
raise with respect to.
2132
self.set_revision_history(self._lefthand_history(revision_id,
2133
last_rev, other_branch))
2135
def basis_tree(self):
2136
"""See Branch.basis_tree."""
2137
return self.repository.revision_tree(self.last_revision())
2140
def pull(self, source, overwrite=False, stop_revision=None,
2141
_hook_master=None, run_hooks=True, possible_transports=None,
2142
_override_hook_target=None):
2145
:param _hook_master: Private parameter - set the branch to
2146
be supplied as the master to pull hooks.
2147
:param run_hooks: Private parameter - if false, this branch
2148
is being called because it's the master of the primary branch,
2149
so it should not run its hooks.
2150
:param _override_hook_target: Private parameter - set the branch to be
2151
supplied as the target_branch to pull hooks.
2153
result = PullResult()
2154
result.source_branch = source
2155
if _override_hook_target is None:
2156
result.target_branch = self
2158
result.target_branch = _override_hook_target
2161
# We assume that during 'pull' the local repository is closer than
2163
graph = self.repository.get_graph(source.repository)
2164
result.old_revno, result.old_revid = self.last_revision_info()
2165
self.update_revisions(source, stop_revision, overwrite=overwrite,
2167
result.tag_conflicts = source.tags.merge_to(self.tags, overwrite)
2168
result.new_revno, result.new_revid = self.last_revision_info()
2170
result.master_branch = _hook_master
2171
result.local_branch = result.target_branch
2173
result.master_branch = result.target_branch
2174
result.local_branch = None
2176
for hook in Branch.hooks['post_pull']:
2182
def _get_parent_location(self):
2183
_locs = ['parent', 'pull', 'x-pull']
2186
return self._transport.get_bytes(l).strip('\n')
2187
except errors.NoSuchFile:
2192
def push(self, target, overwrite=False, stop_revision=None,
2193
_override_hook_source_branch=None):
2196
This is the basic concrete implementation of push()
2198
:param _override_hook_source_branch: If specified, run
2199
the hooks passing this Branch as the source, rather than self.
2200
This is for use of RemoteBranch, where push is delegated to the
2201
underlying vfs-based Branch.
2203
# TODO: Public option to disable running hooks - should be trivial but
2205
return _run_with_write_locked_target(
2206
target, self._push_with_bound_branches, target, overwrite,
2208
_override_hook_source_branch=_override_hook_source_branch)
2210
def _push_with_bound_branches(self, target, overwrite,
2212
_override_hook_source_branch=None):
2213
"""Push from self into target, and into target's master if any.
2215
This is on the base BzrBranch class even though it doesn't support
2216
bound branches because the *target* might be bound.
2219
if _override_hook_source_branch:
2220
result.source_branch = _override_hook_source_branch
2221
for hook in Branch.hooks['post_push']:
2224
bound_location = target.get_bound_location()
2225
if bound_location and target.base != bound_location:
2226
# there is a master branch.
2228
# XXX: Why the second check? Is it even supported for a branch to
2229
# be bound to itself? -- mbp 20070507
2230
master_branch = target.get_master_branch()
2231
master_branch.lock_write()
2233
# push into the master from this branch.
2234
self._basic_push(master_branch, overwrite, stop_revision)
2235
# and push into the target branch from this. Note that we push from
2236
# this branch again, because its considered the highest bandwidth
2238
result = self._basic_push(target, overwrite, stop_revision)
2239
result.master_branch = master_branch
2240
result.local_branch = target
2244
master_branch.unlock()
2247
result = self._basic_push(target, overwrite, stop_revision)
2248
# TODO: Why set master_branch and local_branch if there's no
2249
# binding? Maybe cleaner to just leave them unset? -- mbp
2251
result.master_branch = target
2252
result.local_branch = None
2256
def _basic_push(self, target, overwrite, stop_revision):
2257
"""Basic implementation of push without bound branches or hooks.
2259
Must be called with self read locked and target write locked.
2261
result = BranchPushResult()
2262
result.source_branch = self
2263
result.target_branch = target
2264
result.old_revno, result.old_revid = target.last_revision_info()
2265
if result.old_revid != self.last_revision():
2266
# We assume that during 'push' this repository is closer than
2268
graph = self.repository.get_graph(target.repository)
2269
target.update_revisions(self, stop_revision, overwrite=overwrite,
2271
if self._push_should_merge_tags():
2272
result.tag_conflicts = self.tags.merge_to(target.tags, overwrite)
2273
result.new_revno, result.new_revid = target.last_revision_info()
2276
def get_stacked_on_url(self):
2277
raise errors.UnstackableBranchFormat(self._format, self.base)
2279
def set_push_location(self, location):
2280
"""See Branch.set_push_location."""
2281
self.get_config().set_user_option(
2282
'push_location', location,
2283
store=_mod_config.STORE_LOCATION_NORECURSE)
2285
def _set_parent_location(self, url):
2287
self._transport.delete('parent')
2289
self._transport.put_bytes('parent', url + '\n',
2290
mode=self.bzrdir._get_file_mode())
2293
class BzrBranch5(BzrBranch):
2294
"""A format 5 branch. This supports new features over plain branches.
2296
It has support for a master_branch which is the data for bound branches.
2300
def pull(self, source, overwrite=False, stop_revision=None,
2301
run_hooks=True, possible_transports=None,
2302
_override_hook_target=None):
2303
"""Pull from source into self, updating my master if any.
2305
:param run_hooks: Private parameter - if false, this branch
2306
is being called because it's the master of the primary branch,
2307
so it should not run its hooks.
2309
bound_location = self.get_bound_location()
2310
master_branch = None
2311
if bound_location and source.base != bound_location:
2312
# not pulling from master, so we need to update master.
2313
master_branch = self.get_master_branch(possible_transports)
2314
master_branch.lock_write()
2317
# pull from source into master.
2318
master_branch.pull(source, overwrite, stop_revision,
2320
return super(BzrBranch5, self).pull(source, overwrite,
2321
stop_revision, _hook_master=master_branch,
2322
run_hooks=run_hooks,
2323
_override_hook_target=_override_hook_target)
2326
master_branch.unlock()
2328
def get_bound_location(self):
2330
return self._transport.get_bytes('bound')[:-1]
2331
except errors.NoSuchFile:
2335
def get_master_branch(self, possible_transports=None):
2336
"""Return the branch we are bound to.
2338
:return: Either a Branch, or None
2340
This could memoise the branch, but if thats done
2341
it must be revalidated on each new lock.
2342
So for now we just don't memoise it.
2343
# RBC 20060304 review this decision.
2345
bound_loc = self.get_bound_location()
2349
return Branch.open(bound_loc,
2350
possible_transports=possible_transports)
2351
except (errors.NotBranchError, errors.ConnectionError), e:
2352
raise errors.BoundBranchConnectionFailure(
2356
def set_bound_location(self, location):
2357
"""Set the target where this branch is bound to.
2359
:param location: URL to the target branch
2362
self._transport.put_bytes('bound', location+'\n',
2363
mode=self.bzrdir._get_file_mode())
2366
self._transport.delete('bound')
2367
except errors.NoSuchFile:
2372
def bind(self, other):
2373
"""Bind this branch to the branch other.
2375
This does not push or pull data between the branches, though it does
2376
check for divergence to raise an error when the branches are not
2377
either the same, or one a prefix of the other. That behaviour may not
2378
be useful, so that check may be removed in future.
2380
:param other: The branch to bind to
2383
# TODO: jam 20051230 Consider checking if the target is bound
2384
# It is debatable whether you should be able to bind to
2385
# a branch which is itself bound.
2386
# Committing is obviously forbidden,
2387
# but binding itself may not be.
2388
# Since we *have* to check at commit time, we don't
2389
# *need* to check here
2391
# we want to raise diverged if:
2392
# last_rev is not in the other_last_rev history, AND
2393
# other_last_rev is not in our history, and do it without pulling
2395
self.set_bound_location(other.base)
2399
"""If bound, unbind"""
2400
return self.set_bound_location(None)
2403
def update(self, possible_transports=None):
2404
"""Synchronise this branch with the master branch if any.
2406
:return: None or the last_revision that was pivoted out during the
2409
master = self.get_master_branch(possible_transports)
2410
if master is not None:
2411
old_tip = _mod_revision.ensure_null(self.last_revision())
2412
self.pull(master, overwrite=True)
2413
if self.repository.get_graph().is_ancestor(old_tip,
2414
_mod_revision.ensure_null(self.last_revision())):
2420
class BzrBranch7(BzrBranch5):
2421
"""A branch with support for a fallback repository."""
2423
def _open_hook(self):
2424
if self._ignore_fallbacks:
2427
url = self.get_stacked_on_url()
2428
except (errors.UnstackableRepositoryFormat, errors.NotStacked,
2429
errors.UnstackableBranchFormat):
2432
for hook in Branch.hooks['transform_fallback_location']:
2433
url = hook(self, url)
2435
hook_name = Branch.hooks.get_hook_name(hook)
2436
raise AssertionError(
2437
"'transform_fallback_location' hook %s returned "
2438
"None, not a URL." % hook_name)
2439
self._activate_fallback_location(url, None)
2441
def __init__(self, *args, **kwargs):
2442
self._ignore_fallbacks = kwargs.get('ignore_fallbacks', False)
2443
super(BzrBranch7, self).__init__(*args, **kwargs)
2444
self._last_revision_info_cache = None
2445
self._partial_revision_history_cache = []
2447
def _clear_cached_state(self):
2448
super(BzrBranch7, self)._clear_cached_state()
2449
self._last_revision_info_cache = None
2450
self._partial_revision_history_cache = []
2452
def _last_revision_info(self):
2453
revision_string = self._transport.get_bytes('last-revision')
2454
revno, revision_id = revision_string.rstrip('\n').split(' ', 1)
2455
revision_id = cache_utf8.get_cached_utf8(revision_id)
2457
return revno, revision_id
2459
def _write_last_revision_info(self, revno, revision_id):
2460
"""Simply write out the revision id, with no checks.
2462
Use set_last_revision_info to perform this safely.
2464
Does not update the revision_history cache.
2465
Intended to be called by set_last_revision_info and
2466
_write_revision_history.
2468
revision_id = _mod_revision.ensure_null(revision_id)
2469
out_string = '%d %s\n' % (revno, revision_id)
2470
self._transport.put_bytes('last-revision', out_string,
2471
mode=self.bzrdir._get_file_mode())
2474
def set_last_revision_info(self, revno, revision_id):
2475
revision_id = _mod_revision.ensure_null(revision_id)
2476
old_revno, old_revid = self.last_revision_info()
2477
if self._get_append_revisions_only():
2478
self._check_history_violation(revision_id)
2479
self._run_pre_change_branch_tip_hooks(revno, revision_id)
2480
self._write_last_revision_info(revno, revision_id)
2481
self._clear_cached_state()
2482
self._last_revision_info_cache = revno, revision_id
2483
self._run_post_change_branch_tip_hooks(old_revno, old_revid)
2485
def _synchronize_history(self, destination, revision_id):
2486
"""Synchronize last revision and revision history between branches.
2488
:see: Branch._synchronize_history
2490
# XXX: The base Branch has a fast implementation of this method based
2491
# on set_last_revision_info, but BzrBranch/BzrBranch5 have a slower one
2492
# that uses set_revision_history. This class inherits from BzrBranch5,
2493
# but wants the fast implementation, so it calls
2494
# Branch._synchronize_history directly.
2495
Branch._synchronize_history(self, destination, revision_id)
2497
def _check_history_violation(self, revision_id):
2498
last_revision = _mod_revision.ensure_null(self.last_revision())
2499
if _mod_revision.is_null(last_revision):
2501
if last_revision not in self._lefthand_history(revision_id):
2502
raise errors.AppendRevisionsOnlyViolation(self.base)
2504
def _gen_revision_history(self):
2505
"""Generate the revision history from last revision
2507
last_revno, last_revision = self.last_revision_info()
2508
self._extend_partial_history(stop_index=last_revno-1)
2509
return list(reversed(self._partial_revision_history_cache))
2511
def _extend_partial_history(self, stop_index=None, stop_revision=None):
2512
"""Extend the partial history to include a given index
2514
If a stop_index is supplied, stop when that index has been reached.
2515
If a stop_revision is supplied, stop when that revision is
2516
encountered. Otherwise, stop when the beginning of history is
2519
:param stop_index: The index which should be present. When it is
2520
present, history extension will stop.
2521
:param revision_id: The revision id which should be present. When
2522
it is encountered, history extension will stop.
2524
repo = self.repository
2525
if len(self._partial_revision_history_cache) == 0:
2526
iterator = repo.iter_reverse_revision_history(self.last_revision())
2528
start_revision = self._partial_revision_history_cache[-1]
2529
iterator = repo.iter_reverse_revision_history(start_revision)
2530
#skip the last revision in the list
2531
next_revision = iterator.next()
2532
for revision_id in iterator:
2533
self._partial_revision_history_cache.append(revision_id)
2534
if (stop_index is not None and
2535
len(self._partial_revision_history_cache) > stop_index):
2537
if revision_id == stop_revision:
2540
def _write_revision_history(self, history):
2541
"""Factored out of set_revision_history.
2543
This performs the actual writing to disk, with format-specific checks.
2544
It is intended to be called by BzrBranch5.set_revision_history.
2546
if len(history) == 0:
2547
last_revision = 'null:'
2549
if history != self._lefthand_history(history[-1]):
2550
raise errors.NotLefthandHistory(history)
2551
last_revision = history[-1]
2552
if self._get_append_revisions_only():
2553
self._check_history_violation(last_revision)
2554
self._write_last_revision_info(len(history), last_revision)
2557
def _set_parent_location(self, url):
2558
"""Set the parent branch"""
2559
self._set_config_location('parent_location', url, make_relative=True)
2562
def _get_parent_location(self):
2563
"""Set the parent branch"""
2564
return self._get_config_location('parent_location')
2566
def set_push_location(self, location):
2567
"""See Branch.set_push_location."""
2568
self._set_config_location('push_location', location)
2570
def set_bound_location(self, location):
2571
"""See Branch.set_push_location."""
2573
config = self.get_config()
2574
if location is None:
2575
if config.get_user_option('bound') != 'True':
2578
config.set_user_option('bound', 'False', warn_masked=True)
2581
self._set_config_location('bound_location', location,
2583
config.set_user_option('bound', 'True', warn_masked=True)
2586
def _get_bound_location(self, bound):
2587
"""Return the bound location in the config file.
2589
Return None if the bound parameter does not match"""
2590
config = self.get_config()
2591
config_bound = (config.get_user_option('bound') == 'True')
2592
if config_bound != bound:
2594
return self._get_config_location('bound_location', config=config)
2596
def get_bound_location(self):
2597
"""See Branch.set_push_location."""
2598
return self._get_bound_location(True)
2600
def get_old_bound_location(self):
2601
"""See Branch.get_old_bound_location"""
2602
return self._get_bound_location(False)
2604
def get_stacked_on_url(self):
2605
# you can always ask for the URL; but you might not be able to use it
2606
# if the repo can't support stacking.
2607
## self._check_stackable_repo()
2608
stacked_url = self._get_config_location('stacked_on_location')
2609
if stacked_url is None:
2610
raise errors.NotStacked(self)
2613
def set_append_revisions_only(self, enabled):
2618
self.get_config().set_user_option('append_revisions_only', value,
2621
def _get_append_revisions_only(self):
2622
value = self.get_config().get_user_option('append_revisions_only')
2623
return value == 'True'
2626
def generate_revision_history(self, revision_id, last_rev=None,
2628
"""See BzrBranch5.generate_revision_history"""
2629
history = self._lefthand_history(revision_id, last_rev, other_branch)
2630
revno = len(history)
2631
self.set_last_revision_info(revno, revision_id)
2634
def get_rev_id(self, revno, history=None):
2635
"""Find the revision id of the specified revno."""
2637
return _mod_revision.NULL_REVISION
2639
last_revno, last_revision_id = self.last_revision_info()
2640
if revno <= 0 or revno > last_revno:
2641
raise errors.NoSuchRevision(self, revno)
2643
if history is not None:
2644
return history[revno - 1]
2646
index = last_revno - revno
2647
if len(self._partial_revision_history_cache) <= index:
2648
self._extend_partial_history(stop_index=index)
2649
if len(self._partial_revision_history_cache) > index:
2650
return self._partial_revision_history_cache[index]
2652
raise errors.NoSuchRevision(self, revno)
2655
def revision_id_to_revno(self, revision_id):
2656
"""Given a revision id, return its revno"""
2657
if _mod_revision.is_null(revision_id):
2660
index = self._partial_revision_history_cache.index(revision_id)
2662
self._extend_partial_history(stop_revision=revision_id)
2663
index = len(self._partial_revision_history_cache) - 1
2664
if self._partial_revision_history_cache[index] != revision_id:
2665
raise errors.NoSuchRevision(self, revision_id)
2666
return self.revno() - index
2669
class BzrBranch6(BzrBranch7):
2670
"""See BzrBranchFormat6 for the capabilities of this branch.
2672
This subclass of BzrBranch7 disables the new features BzrBranch7 added,
2676
def get_stacked_on_url(self):
2677
raise errors.UnstackableBranchFormat(self._format, self.base)
2680
######################################################################
2681
# results of operations
2684
class _Result(object):
2686
def _show_tag_conficts(self, to_file):
2687
if not getattr(self, 'tag_conflicts', None):
2689
to_file.write('Conflicting tags:\n')
2690
for name, value1, value2 in self.tag_conflicts:
2691
to_file.write(' %s\n' % (name, ))
2694
class PullResult(_Result):
2695
"""Result of a Branch.pull operation.
2697
:ivar old_revno: Revision number before pull.
2698
:ivar new_revno: Revision number after pull.
2699
:ivar old_revid: Tip revision id before pull.
2700
:ivar new_revid: Tip revision id after pull.
2701
:ivar source_branch: Source (local) branch object. (read locked)
2702
:ivar master_branch: Master branch of the target, or the target if no
2704
:ivar local_branch: target branch if there is a Master, else None
2705
:ivar target_branch: Target/destination branch object. (write locked)
2706
:ivar tag_conflicts: A list of tag conflicts, see BasicTags.merge_to
2710
# DEPRECATED: pull used to return the change in revno
2711
return self.new_revno - self.old_revno
2713
def report(self, to_file):
2715
if self.old_revid == self.new_revid:
2716
to_file.write('No revisions to pull.\n')
2718
to_file.write('Now on revision %d.\n' % self.new_revno)
2719
self._show_tag_conficts(to_file)
2722
class BranchPushResult(_Result):
2723
"""Result of a Branch.push operation.
2725
:ivar old_revno: Revision number (eg 10) of the target before push.
2726
:ivar new_revno: Revision number (eg 12) of the target after push.
2727
:ivar old_revid: Tip revision id (eg joe@foo.com-1234234-aoeua34) of target
2729
:ivar new_revid: Tip revision id (eg joe@foo.com-5676566-boa234a) of target
2731
:ivar source_branch: Source branch object that the push was from. This is
2732
read locked, and generally is a local (and thus low latency) branch.
2733
:ivar master_branch: If target is a bound branch, the master branch of
2734
target, or target itself. Always write locked.
2735
:ivar target_branch: The direct Branch where data is being sent (write
2737
:ivar local_branch: If the target is a bound branch this will be the
2738
target, otherwise it will be None.
2742
# DEPRECATED: push used to return the change in revno
2743
return self.new_revno - self.old_revno
2745
def report(self, to_file):
2746
"""Write a human-readable description of the result."""
2747
if self.old_revid == self.new_revid:
2748
note('No new revisions to push.')
2750
note('Pushed up to revision %d.' % self.new_revno)
2751
self._show_tag_conficts(to_file)
2754
class BranchCheckResult(object):
2755
"""Results of checking branch consistency.
2760
def __init__(self, branch):
2761
self.branch = branch
2763
def report_results(self, verbose):
2764
"""Report the check results via trace.note.
2766
:param verbose: Requests more detailed display of what was checked,
2769
note('checked branch %s format %s',
2771
self.branch._format)
2774
class Converter5to6(object):
2775
"""Perform an in-place upgrade of format 5 to format 6"""
2777
def convert(self, branch):
2778
# Data for 5 and 6 can peacefully coexist.
2779
format = BzrBranchFormat6()
2780
new_branch = format.open(branch.bzrdir, _found=True)
2782
# Copy source data into target
2783
new_branch._write_last_revision_info(*branch.last_revision_info())
2784
new_branch.set_parent(branch.get_parent())
2785
new_branch.set_bound_location(branch.get_bound_location())
2786
new_branch.set_push_location(branch.get_push_location())
2788
# New branch has no tags by default
2789
new_branch.tags._set_tag_dict({})
2791
# Copying done; now update target format
2792
new_branch._transport.put_bytes('format',
2793
format.get_format_string(),
2794
mode=new_branch.bzrdir._get_file_mode())
2796
# Clean up old files
2797
new_branch._transport.delete('revision-history')
2799
branch.set_parent(None)
2800
except errors.NoSuchFile:
2802
branch.set_bound_location(None)
2805
class Converter6to7(object):
2806
"""Perform an in-place upgrade of format 6 to format 7"""
2808
def convert(self, branch):
2809
format = BzrBranchFormat7()
2810
branch._set_config_location('stacked_on_location', '')
2811
# update target format
2812
branch._transport.put_bytes('format', format.get_format_string())
2816
def _run_with_write_locked_target(target, callable, *args, **kwargs):
2817
"""Run ``callable(*args, **kwargs)``, write-locking target for the
2820
_run_with_write_locked_target will attempt to release the lock it acquires.
2822
If an exception is raised by callable, then that exception *will* be
2823
propagated, even if the unlock attempt raises its own error. Thus
2824
_run_with_write_locked_target should be preferred to simply doing::
2828
return callable(*args, **kwargs)
2833
# This is very similar to bzrlib.decorators.needs_write_lock. Perhaps they
2834
# should share code?
2837
result = callable(*args, **kwargs)
2839
exc_info = sys.exc_info()
2843
raise exc_info[0], exc_info[1], exc_info[2]
2849
class InterBranch(InterObject):
2850
"""This class represents operations taking place between two branches.
2852
Its instances have methods like pull() and push() and contain
2853
references to the source and target repositories these operations
2854
can be carried out on.
2858
"""The available optimised InterBranch types."""
2861
def _get_branch_formats_to_test():
2862
"""Return a tuple with the Branch formats to use when testing."""
2863
raise NotImplementedError(self._get_branch_formats_to_test)
2865
def update_revisions(self, stop_revision=None, overwrite=False,
2867
"""Pull in new perfect-fit revisions.
2869
:param stop_revision: Updated until the given revision
2870
:param overwrite: Always set the branch pointer, rather than checking
2871
to see if it is a proper descendant.
2872
:param graph: A Graph object that can be used to query history
2873
information. This can be None.
2876
raise NotImplementedError(self.update_revisions)
2879
class GenericInterBranch(InterBranch):
2880
"""InterBranch implementation that uses public Branch functions.
2884
def _get_branch_formats_to_test():
2885
return BranchFormat._default_format, BranchFormat._default_format
2887
def update_revisions(self, stop_revision=None, overwrite=False,
2889
"""See InterBranch.update_revisions()."""
2890
self.source.lock_read()
2892
other_revno, other_last_revision = self.source.last_revision_info()
2893
stop_revno = None # unknown
2894
if stop_revision is None:
2895
stop_revision = other_last_revision
2896
if _mod_revision.is_null(stop_revision):
2897
# if there are no commits, we're done.
2899
stop_revno = other_revno
2901
# what's the current last revision, before we fetch [and change it
2903
last_rev = _mod_revision.ensure_null(self.target.last_revision())
2904
# we fetch here so that we don't process data twice in the common
2905
# case of having something to pull, and so that the check for
2906
# already merged can operate on the just fetched graph, which will
2907
# be cached in memory.
2908
self.target.fetch(self.source, stop_revision)
2909
# Check to see if one is an ancestor of the other
2912
graph = self.target.repository.get_graph()
2913
if self.target._check_if_descendant_or_diverged(
2914
stop_revision, last_rev, graph, self.source):
2915
# stop_revision is a descendant of last_rev, but we aren't
2916
# overwriting, so we're done.
2918
if stop_revno is None:
2920
graph = self.target.repository.get_graph()
2921
this_revno, this_last_revision = \
2922
self.target.last_revision_info()
2923
stop_revno = graph.find_distance_to_null(stop_revision,
2924
[(other_last_revision, other_revno),
2925
(this_last_revision, this_revno)])
2926
self.target.set_last_revision_info(stop_revno, stop_revision)
2928
self.source.unlock()
2931
def is_compatible(self, source, target):
2932
# GenericBranch uses the public API, so always compatible
2936
InterBranch.register_optimiser(GenericInterBranch)
added
removed
bzrlib/branch.py
