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# Copyright (C) 2005, 2006 Canonical Ltd
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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from copy import deepcopy
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from cStringIO import StringIO
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from unittest import TestSuite
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from warnings import warn
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from bzrlib.config import TreeConfig
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from bzrlib.decorators import needs_read_lock, needs_write_lock
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import bzrlib.errors as errors
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from bzrlib.errors import (BzrError, BzrCheckError, DivergedBranches,
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HistoryMissing, InvalidRevisionId,
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InvalidRevisionNumber, LockError, NoSuchFile,
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NoSuchRevision, NoWorkingTree, NotVersionedError,
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NotBranchError, UninitializableFormat,
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UnlistableStore, UnlistableBranch,
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from bzrlib.lockable_files import LockableFiles, TransportLock
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from bzrlib.symbol_versioning import (deprecated_function,
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zero_eight, zero_nine,
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from bzrlib.trace import mutter, note
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BZR_BRANCH_FORMAT_4 = "Bazaar-NG branch, format 0.0.4\n"
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BZR_BRANCH_FORMAT_5 = "Bazaar-NG branch, format 5\n"
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BZR_BRANCH_FORMAT_6 = "Bazaar-NG branch, format 6\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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# this is really an instance variable - FIXME move it there
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def __init__(self, *ignored, **ignored_too):
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raise NotImplementedError('The Branch class is abstract')
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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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@deprecated_method(zero_eight)
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def open_downlevel(base):
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"""Open a branch which may be of an old format."""
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return Branch.open(base, _unsupported=True)
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def open(base, _unsupported=False):
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"""Open the branch rooted at base.
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For instance, if the branch is at URL/.bzr/branch,
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Branch.open(URL) -> a Branch instance.
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control = bzrdir.BzrDir.open(base, _unsupported)
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return control.open_branch(_unsupported)
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def open_containing(url):
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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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@deprecated_function(zero_eight)
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def initialize(base):
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"""Create a new working tree and branch, rooted at 'base' (url)
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NOTE: This will soon be deprecated in favour of creation
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return bzrdir.BzrDir.create_standalone_workingtree(base).branch
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def setup_caching(self, cache_root):
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"""Subclasses that care about caching should override this, and set
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up cached stores located under cache_root.
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# seems to be unused, 2006-01-13 mbp
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warn('%s is deprecated' % self.setup_caching)
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self.cache_root = cache_root
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def get_config(self):
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return bzrlib.config.BranchConfig(self)
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return self.get_config().get_nickname()
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def _set_nick(self, nick):
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self.get_config().set_user_option('nickname', nick)
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nick = property(_get_nick, _set_nick)
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raise NotImplementedError(self.is_locked)
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def lock_write(self):
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raise NotImplementedError(self.lock_write)
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raise NotImplementedError(self.lock_read)
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raise NotImplementedError(self.unlock)
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def peek_lock_mode(self):
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"""Return lock mode for the Branch: 'r', 'w' or None"""
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raise NotImplementedError(self.peek_lock_mode)
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def get_physical_lock_status(self):
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raise NotImplementedError(self.get_physical_lock_status)
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def abspath(self, name):
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"""Return absolute filename for something in the branch
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XXX: Robert Collins 20051017 what is this used for? why is it a branch
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method and not a tree method.
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raise NotImplementedError(self.abspath)
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def bind(self, other):
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"""Bind the local branch the other branch.
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:param other: The branch to bind to
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raise errors.UpgradeRequired(self.base)
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def fetch(self, from_branch, last_revision=None, pb=None):
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"""Copy revisions from from_branch into this branch.
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:param from_branch: Where to copy from.
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:param last_revision: What revision to stop at (None for at the end
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:param pb: An optional progress bar to use.
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Returns the copied revision count and the failed revisions in a tuple:
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if self.base == from_branch.base:
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nested_pb = ui.ui_factory.nested_progress_bar()
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from_branch.lock_read()
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if last_revision is None:
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pb.update('get source history')
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from_history = from_branch.revision_history()
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last_revision = from_history[-1]
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# no history in the source branch
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last_revision = revision.NULL_REVISION
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return self.repository.fetch(from_branch.repository,
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revision_id=last_revision,
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if nested_pb is not None:
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def get_bound_location(self):
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"""Return the URL of the branch we are bound to.
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Older format branches cannot bind, please be sure to use a metadir
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def get_commit_builder(self, parents, config=None, timestamp=None,
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timezone=None, committer=None, revprops=None,
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"""Obtain a CommitBuilder for this branch.
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:param parents: Revision ids of the parents of the new revision.
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:param config: Optional configuration to use.
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:param timestamp: Optional timestamp recorded for commit.
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:param timezone: Optional timezone for timestamp.
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:param committer: Optional committer to set for commit.
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:param revprops: Optional dictionary of revision properties.
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:param revision_id: Optional revision id.
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config = self.get_config()
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return self.repository.get_commit_builder(self, parents, config,
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timestamp, timezone, committer, revprops, revision_id)
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def get_master_branch(self):
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"""Return the branch we are bound to.
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:return: Either a Branch, or None
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def get_revision_delta(self, revno):
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"""Return the delta for one revision.
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The delta is relative to its mainline predecessor, or the
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empty tree for revision 1.
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assert isinstance(revno, int)
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rh = self.revision_history()
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if not (1 <= revno <= len(rh)):
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raise InvalidRevisionNumber(revno)
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return self.repository.get_revision_delta(rh[revno-1])
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def get_root_id(self):
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"""Return the id of this branches root"""
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raise NotImplementedError(self.get_root_id)
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def print_file(self, file, revision_id):
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"""Print `file` to stdout."""
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raise NotImplementedError(self.print_file)
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def append_revision(self, *revision_ids):
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raise NotImplementedError(self.append_revision)
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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 revision_history(self):
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"""Return sequence of revision hashes on to this branch."""
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raise NotImplementedError('revision_history is abstract')
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"""Return current revision number for this branch.
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That is equivalent to the number of revisions committed to
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return len(self.revision_history())
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"""Older format branches cannot bind or unbind."""
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raise errors.UpgradeRequired(self.base)
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def last_revision(self):
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"""Return last revision id, or None"""
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ph = self.revision_history()
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def missing_revisions(self, other, stop_revision=None):
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"""Return a list of new revisions that would perfectly fit.
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If self and other have not diverged, return a list of the revisions
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present in other, but missing from self.
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self_history = self.revision_history()
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self_len = len(self_history)
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other_history = other.revision_history()
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other_len = len(other_history)
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common_index = min(self_len, other_len) -1
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if common_index >= 0 and \
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self_history[common_index] != other_history[common_index]:
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raise DivergedBranches(self, other)
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if stop_revision is None:
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stop_revision = other_len
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assert isinstance(stop_revision, int)
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if stop_revision > other_len:
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raise errors.NoSuchRevision(self, stop_revision)
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return other_history[self_len:stop_revision]
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def update_revisions(self, other, stop_revision=None):
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"""Pull in new perfect-fit revisions.
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:param other: Another Branch to pull from
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:param stop_revision: Updated until the given revision
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raise NotImplementedError(self.update_revisions)
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def revision_id_to_revno(self, revision_id):
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"""Given a revision id, return its revno"""
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if revision_id is None:
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history = self.revision_history()
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return history.index(revision_id) + 1
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raise bzrlib.errors.NoSuchRevision(self, revision_id)
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def get_rev_id(self, revno, history=None):
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"""Find the revision id of the specified revno."""
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history = self.revision_history()
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if revno <= 0 or revno > len(history):
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raise bzrlib.errors.NoSuchRevision(self, revno)
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return history[revno - 1]
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def pull(self, source, overwrite=False, stop_revision=None):
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raise NotImplementedError(self.pull)
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def basis_tree(self):
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"""Return `Tree` object for last revision."""
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return self.repository.revision_tree(self.last_revision())
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def rename_one(self, from_rel, to_rel):
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This can change the directory or the filename or both.
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raise NotImplementedError(self.rename_one)
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def move(self, from_paths, to_name):
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to_name must exist as a versioned directory.
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If to_name exists and is a directory, the files are moved into
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it, keeping their old names. If it is a directory,
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Note that to_name is only the last component of the new name;
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this doesn't change the directory.
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This returns a list of (from_path, to_path) pairs for each
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raise NotImplementedError(self.move)
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def get_parent(self):
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"""Return the parent location of the branch.
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This is the default location for push/pull/missing. The usual
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pattern is that the user can override it by specifying a
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raise NotImplementedError(self.get_parent)
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def get_submit_branch(self):
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"""Return the submit location of the branch.
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This is the default location for bundle. The usual
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pattern is that the user can override it by specifying a
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return self.get_config().get_user_option('submit_branch')
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def set_submit_branch(self, location):
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"""Return the submit location of the branch.
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This is the default location for bundle. The usual
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pattern is that the user can override it by specifying a
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self.get_config().set_user_option('submit_branch', location)
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def get_push_location(self):
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"""Return the None or the location to push this branch to."""
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raise NotImplementedError(self.get_push_location)
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def set_push_location(self, location):
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"""Set a new push location for this branch."""
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raise NotImplementedError(self.set_push_location)
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def set_parent(self, url):
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raise NotImplementedError(self.set_parent)
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"""Synchronise this branch with the master branch if any.
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:return: None or the last_revision pivoted out during the update.
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def check_revno(self, revno):
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Check whether a revno corresponds to any revision.
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Zero (the NULL revision) is considered valid.
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self.check_real_revno(revno)
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def check_real_revno(self, revno):
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Check whether a revno corresponds to a real revision.
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Zero (the NULL revision) is considered invalid
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if revno < 1 or revno > self.revno():
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raise InvalidRevisionNumber(revno)
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def clone(self, *args, **kwargs):
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"""Clone this branch into to_bzrdir preserving all semantic values.
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revision_id: if not None, the revision history in the new branch will
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be truncated to end with revision_id.
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# for API compatibility, until 0.8 releases we provide the old api:
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# def clone(self, to_location, revision=None, basis_branch=None, to_branch_format=None):
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# after 0.8 releases, the *args and **kwargs should be changed:
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# def clone(self, to_bzrdir, revision_id=None):
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if (kwargs.get('to_location', None) or
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kwargs.get('revision', None) or
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kwargs.get('basis_branch', None) or
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(len(args) and isinstance(args[0], basestring))):
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# backwards compatibility api:
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warn("Branch.clone() has been deprecated for BzrDir.clone() from"
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" bzrlib 0.8.", DeprecationWarning, stacklevel=3)
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basis_branch = args[2]
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basis_branch = kwargs.get('basis_branch', None)
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basis = basis_branch.bzrdir
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revision_id = args[1]
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revision_id = kwargs.get('revision', None)
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# no default to raise if not provided.
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url = kwargs.get('to_location')
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return self.bzrdir.clone(url,
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revision_id=revision_id,
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basis=basis).open_branch()
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# generate args by hand
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revision_id = args[1]
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revision_id = kwargs.get('revision_id', None)
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# no default to raise if not provided.
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to_bzrdir = kwargs.get('to_bzrdir')
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result = self._format.initialize(to_bzrdir)
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self.copy_content_into(result, revision_id=revision_id)
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def sprout(self, to_bzrdir, revision_id=None):
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"""Create a new line of development from the branch, into to_bzrdir.
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revision_id: if not None, the revision history in the new branch will
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be truncated to end with revision_id.
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result = self._format.initialize(to_bzrdir)
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self.copy_content_into(result, revision_id=revision_id)
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result.set_parent(self.bzrdir.root_transport.base)
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def copy_content_into(self, destination, revision_id=None):
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"""Copy the content of self into destination.
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revision_id: if not None, the revision history in the new branch will
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be truncated to end with revision_id.
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new_history = self.revision_history()
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if revision_id is not None:
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new_history = new_history[:new_history.index(revision_id) + 1]
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rev = self.repository.get_revision(revision_id)
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new_history = rev.get_history(self.repository)[1:]
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destination.set_revision_history(new_history)
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parent = self.get_parent()
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except errors.InaccessibleParent, e:
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mutter('parent was not accessible to copy: %s', e)
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destination.set_parent(parent)
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"""Check consistency of the branch.
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In particular this checks that revisions given in the revision-history
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do actually match up in the revision graph, and that they're all
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present in the repository.
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Callers will typically also want to check the repository.
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:return: A BranchCheckResult.
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mainline_parent_id = None
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for revision_id in self.revision_history():
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revision = self.repository.get_revision(revision_id)
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except errors.NoSuchRevision, e:
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raise errors.BzrCheckError("mainline revision {%s} not in repository"
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# In general the first entry on the revision history has no parents.
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# But it's not illegal for it to have parents listed; this can happen
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# in imports from Arch when the parents weren't reachable.
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if mainline_parent_id is not None:
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if mainline_parent_id not in revision.parent_ids:
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raise errors.BzrCheckError("previous revision {%s} not listed among "
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% (mainline_parent_id, revision_id))
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mainline_parent_id = revision_id
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return BranchCheckResult(self)
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def create_checkout(self, to_location, revision_id=None,
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"""Create a checkout of a branch.
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:param to_location: The url to produce the checkout at
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:param revision_id: The revision to check out
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:param lightweight: If True, produce a lightweight checkout, otherwise,
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produce a bound branch (heavyweight checkout)
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:return: The tree of the created checkout
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t = transport.get_transport(to_location)
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except errors.FileExists:
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checkout = bzrdir.BzrDirMetaFormat1().initialize_on_transport(t)
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BranchReferenceFormat().initialize(checkout, self)
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checkout_branch = bzrdir.BzrDir.create_branch_convenience(
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to_location, force_new_tree=False)
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checkout = checkout_branch.bzrdir
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checkout_branch.bind(self)
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if revision_id is not None:
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rh = checkout_branch.revision_history()
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new_rh = rh[:rh.index(revision_id) + 1]
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checkout_branch.set_revision_history(new_rh)
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return checkout.create_workingtree(revision_id)
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class BranchFormat(object):
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"""An encapsulation of the initialization and open routines for a format.
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Formats provide three things:
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* An initialization routine,
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Formats are placed in an dict by their format string for reference
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during branch opening. Its not required that these be instances, they
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can be classes themselves with class methods - it simply depends on
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whether state is needed for a given format or not.
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Once a format is deprecated, just deprecate the initialize and open
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methods on the format class. Do not deprecate the object, as the
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object will be created every time regardless.
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_default_format = None
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"""The default format used for new branches."""
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"""The known formats."""
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def find_format(klass, a_bzrdir):
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"""Return the format for the branch object in a_bzrdir."""
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transport = a_bzrdir.get_branch_transport(None)
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format_string = transport.get("format").read()
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return klass._formats[format_string]
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raise NotBranchError(path=transport.base)
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raise errors.UnknownFormatError(format=format_string)
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def get_default_format(klass):
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"""Return the current default format."""
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return klass._default_format
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def get_format_string(self):
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"""Return the ASCII format string that identifies this format."""
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raise NotImplementedError(self.get_format_string)
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def get_format_description(self):
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"""Return the short format description for this format."""
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raise NotImplementedError(self.get_format_string)
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def initialize(self, a_bzrdir):
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"""Create a branch of this format in a_bzrdir."""
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raise NotImplementedError(self.initialize)
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def is_supported(self):
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"""Is this format supported?
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Supported formats can be initialized and opened.
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Unsupported formats may not support initialization or committing or
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some other features depending on the reason for not being supported.
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def open(self, a_bzrdir, _found=False):
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"""Return the branch object for a_bzrdir
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_found is a private parameter, do not use it. It is used to indicate
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if format probing has already be done.
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raise NotImplementedError(self.open)
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def register_format(klass, format):
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klass._formats[format.get_format_string()] = format
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def set_default_format(klass, format):
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klass._default_format = format
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def unregister_format(klass, format):
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assert klass._formats[format.get_format_string()] is format
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del klass._formats[format.get_format_string()]
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return self.get_format_string().rstrip()
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class BzrBranchFormat4(BranchFormat):
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"""Bzr branch format 4.
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- a revision-history file.
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- a branch-lock lock file [ to be shared with the bzrdir ]
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def get_format_description(self):
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"""See BranchFormat.get_format_description()."""
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return "Branch format 4"
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def initialize(self, a_bzrdir):
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"""Create a branch of this format in a_bzrdir."""
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mutter('creating branch in %s', a_bzrdir.transport.base)
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branch_transport = a_bzrdir.get_branch_transport(self)
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utf8_files = [('revision-history', ''),
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control_files = LockableFiles(branch_transport, 'branch-lock',
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control_files.create_lock()
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control_files.lock_write()
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for file, content in utf8_files:
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control_files.put_utf8(file, content)
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control_files.unlock()
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return self.open(a_bzrdir, _found=True)
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super(BzrBranchFormat4, self).__init__()
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self._matchingbzrdir = bzrdir.BzrDirFormat6()
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def open(self, a_bzrdir, _found=False):
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"""Return the branch object for a_bzrdir
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_found is a private parameter, do not use it. It is used to indicate
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if format probing has already be done.
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# we are being called directly and must probe.
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raise NotImplementedError
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return BzrBranch(_format=self,
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_control_files=a_bzrdir._control_files,
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_repository=a_bzrdir.open_repository())
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return "Bazaar-NG branch format 4"
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class BzrBranchFormat5(BranchFormat):
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"""Bzr branch format 5.
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- a revision-history file.
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- a lock dir guarding the branch itself
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- all of this stored in a branch/ subdirectory
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- works with shared repositories.
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This format is new in bzr 0.8.
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def get_format_string(self):
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"""See BranchFormat.get_format_string()."""
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return "Bazaar-NG branch format 5\n"
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def get_format_description(self):
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"""See BranchFormat.get_format_description()."""
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return "Branch format 5"
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def initialize(self, a_bzrdir):
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"""Create a branch of this format in a_bzrdir."""
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mutter('creating branch %r in %s', self, a_bzrdir.transport.base)
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branch_transport = a_bzrdir.get_branch_transport(self)
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utf8_files = [('revision-history', ''),
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control_files = LockableFiles(branch_transport, 'lock', lockdir.LockDir)
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control_files.create_lock()
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control_files.lock_write()
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control_files.put_utf8('format', self.get_format_string())
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for file, content in utf8_files:
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control_files.put_utf8(file, content)
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control_files.unlock()
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return self.open(a_bzrdir, _found=True, )
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super(BzrBranchFormat5, self).__init__()
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self._matchingbzrdir = bzrdir.BzrDirMetaFormat1()
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def open(self, a_bzrdir, _found=False):
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"""Return the branch object for a_bzrdir
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_found is a private parameter, do not use it. It is used to indicate
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if format probing has already be done.
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format = BranchFormat.find_format(a_bzrdir)
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assert format.__class__ == self.__class__
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transport = a_bzrdir.get_branch_transport(None)
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control_files = LockableFiles(transport, 'lock', lockdir.LockDir)
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return BzrBranch5(_format=self,
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_control_files=control_files,
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_repository=a_bzrdir.find_repository())
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return "Bazaar-NG Metadir branch format 5"
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class BranchReferenceFormat(BranchFormat):
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"""Bzr branch reference format.
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Branch references are used in implementing checkouts, they
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act as an alias to the real branch which is at some other url.
826
def get_format_string(self):
827
"""See BranchFormat.get_format_string()."""
828
return "Bazaar-NG Branch Reference Format 1\n"
830
def get_format_description(self):
831
"""See BranchFormat.get_format_description()."""
832
return "Checkout reference format 1"
834
def initialize(self, a_bzrdir, target_branch=None):
835
"""Create a branch of this format in a_bzrdir."""
836
if target_branch is None:
837
# this format does not implement branch itself, thus the implicit
838
# creation contract must see it as uninitializable
839
raise errors.UninitializableFormat(self)
840
mutter('creating branch reference in %s', a_bzrdir.transport.base)
841
branch_transport = a_bzrdir.get_branch_transport(self)
842
branch_transport.put_bytes('location',
843
target_branch.bzrdir.root_transport.base)
844
branch_transport.put_bytes('format', self.get_format_string())
845
return self.open(a_bzrdir, _found=True)
848
super(BranchReferenceFormat, self).__init__()
849
self._matchingbzrdir = bzrdir.BzrDirMetaFormat1()
851
def _make_reference_clone_function(format, a_branch):
852
"""Create a clone() routine for a branch dynamically."""
853
def clone(to_bzrdir, revision_id=None):
854
"""See Branch.clone()."""
855
return format.initialize(to_bzrdir, a_branch)
856
# cannot obey revision_id limits when cloning a reference ...
857
# FIXME RBC 20060210 either nuke revision_id for clone, or
858
# emit some sort of warning/error to the caller ?!
861
def open(self, a_bzrdir, _found=False):
862
"""Return the branch that the branch reference in a_bzrdir points at.
864
_found is a private parameter, do not use it. It is used to indicate
865
if format probing has already be done.
868
format = BranchFormat.find_format(a_bzrdir)
869
assert format.__class__ == self.__class__
870
transport = a_bzrdir.get_branch_transport(None)
871
real_bzrdir = bzrdir.BzrDir.open(transport.get('location').read())
872
result = real_bzrdir.open_branch()
873
# this changes the behaviour of result.clone to create a new reference
874
# rather than a copy of the content of the branch.
875
# I did not use a proxy object because that needs much more extensive
876
# testing, and we are only changing one behaviour at the moment.
877
# If we decide to alter more behaviours - i.e. the implicit nickname
878
# then this should be refactored to introduce a tested proxy branch
879
# and a subclass of that for use in overriding clone() and ....
881
result.clone = self._make_reference_clone_function(result)
885
# formats which have no format string are not discoverable
886
# and not independently creatable, so are not registered.
887
__default_format = BzrBranchFormat5()
888
BranchFormat.register_format(__default_format)
889
BranchFormat.register_format(BranchReferenceFormat())
890
BranchFormat.set_default_format(__default_format)
891
_legacy_formats = [BzrBranchFormat4(),
894
class BzrBranch(Branch):
895
"""A branch stored in the actual filesystem.
897
Note that it's "local" in the context of the filesystem; it doesn't
898
really matter if it's on an nfs/smb/afs/coda/... share, as long as
899
it's writable, and can be accessed via the normal filesystem API.
902
def __init__(self, transport=DEPRECATED_PARAMETER, init=DEPRECATED_PARAMETER,
903
relax_version_check=DEPRECATED_PARAMETER, _format=None,
904
_control_files=None, a_bzrdir=None, _repository=None):
905
"""Create new branch object at a particular location.
907
transport -- A Transport object, defining how to access files.
909
init -- If True, create new control files in a previously
910
unversioned directory. If False, the branch must already
913
relax_version_check -- If true, the usual check for the branch
914
version is not applied. This is intended only for
915
upgrade/recovery type use; it's not guaranteed that
916
all operations will work on old format branches.
919
self.bzrdir = bzrdir.BzrDir.open(transport.base)
921
self.bzrdir = a_bzrdir
922
self._transport = self.bzrdir.transport.clone('..')
923
self._base = self._transport.base
924
self._format = _format
925
if _control_files is None:
926
raise ValueError('BzrBranch _control_files is None')
927
self.control_files = _control_files
928
if deprecated_passed(init):
929
warn("BzrBranch.__init__(..., init=XXX): The init parameter is "
930
"deprecated as of bzr 0.8. Please use Branch.create().",
934
# this is slower than before deprecation, oh well never mind.
936
self._initialize(transport.base)
937
self._check_format(_format)
938
if deprecated_passed(relax_version_check):
939
warn("BzrBranch.__init__(..., relax_version_check=XXX_: The "
940
"relax_version_check parameter is deprecated as of bzr 0.8. "
941
"Please use BzrDir.open_downlevel, or a BzrBranchFormat's "
945
if (not relax_version_check
946
and not self._format.is_supported()):
947
raise errors.UnsupportedFormatError(format=fmt)
948
if deprecated_passed(transport):
949
warn("BzrBranch.__init__(transport=XXX...): The transport "
950
"parameter is deprecated as of bzr 0.8. "
951
"Please use Branch.open, or bzrdir.open_branch().",
954
self.repository = _repository
957
return '%s(%r)' % (self.__class__.__name__, self.base)
962
# TODO: It might be best to do this somewhere else,
963
# but it is nice for a Branch object to automatically
964
# cache it's information.
965
# Alternatively, we could have the Transport objects cache requests
966
# See the earlier discussion about how major objects (like Branch)
967
# should never expect their __del__ function to run.
968
# XXX: cache_root seems to be unused, 2006-01-13 mbp
969
if hasattr(self, 'cache_root') and self.cache_root is not None:
971
osutils.rmtree(self.cache_root)
974
self.cache_root = None
979
base = property(_get_base, doc="The URL for the root of this branch.")
981
def _finish_transaction(self):
982
"""Exit the current transaction."""
983
return self.control_files._finish_transaction()
985
def get_transaction(self):
986
"""Return the current active transaction.
988
If no transaction is active, this returns a passthrough object
989
for which all data is immediately flushed and no caching happens.
991
# this is an explicit function so that we can do tricky stuff
992
# when the storage in rev_storage is elsewhere.
993
# we probably need to hook the two 'lock a location' and
994
# 'have a transaction' together more delicately, so that
995
# we can have two locks (branch and storage) and one transaction
996
# ... and finishing the transaction unlocks both, but unlocking
997
# does not. - RBC 20051121
998
return self.control_files.get_transaction()
1000
def _set_transaction(self, transaction):
1001
"""Set a new active transaction."""
1002
return self.control_files._set_transaction(transaction)
1004
def abspath(self, name):
1005
"""See Branch.abspath."""
1006
return self.control_files._transport.abspath(name)
1008
def _check_format(self, format):
1009
"""Identify the branch format if needed.
1011
The format is stored as a reference to the format object in
1012
self._format for code that needs to check it later.
1014
The format parameter is either None or the branch format class
1015
used to open this branch.
1017
FIXME: DELETE THIS METHOD when pre 0.8 support is removed.
1020
format = BranchFormat.find_format(self.bzrdir)
1021
self._format = format
1022
mutter("got branch format %s", self._format)
1025
def get_root_id(self):
1026
"""See Branch.get_root_id."""
1027
tree = self.repository.revision_tree(self.last_revision())
1028
return tree.inventory.root.file_id
1030
def is_locked(self):
1031
return self.control_files.is_locked()
1033
def lock_write(self):
1034
self.repository.lock_write()
1036
self.control_files.lock_write()
1038
self.repository.unlock()
1041
def lock_read(self):
1042
self.repository.lock_read()
1044
self.control_files.lock_read()
1046
self.repository.unlock()
1050
# TODO: test for failed two phase locks. This is known broken.
1052
self.control_files.unlock()
1054
self.repository.unlock()
1056
def peek_lock_mode(self):
1057
if self.control_files._lock_count == 0:
1060
return self.control_files._lock_mode
1062
def get_physical_lock_status(self):
1063
return self.control_files.get_physical_lock_status()
1066
def print_file(self, file, revision_id):
1067
"""See Branch.print_file."""
1068
return self.repository.print_file(file, revision_id)
1071
def append_revision(self, *revision_ids):
1072
"""See Branch.append_revision."""
1073
for revision_id in revision_ids:
1074
mutter("add {%s} to revision-history" % revision_id)
1075
rev_history = self.revision_history()
1076
rev_history.extend(revision_ids)
1077
self.set_revision_history(rev_history)
1080
def set_revision_history(self, rev_history):
1081
"""See Branch.set_revision_history."""
1082
self.control_files.put_utf8(
1083
'revision-history', '\n'.join(rev_history))
1084
transaction = self.get_transaction()
1085
history = transaction.map.find_revision_history()
1086
if history is not None:
1087
# update the revision history in the identity map.
1088
history[:] = list(rev_history)
1089
# this call is disabled because revision_history is
1090
# not really an object yet, and the transaction is for objects.
1091
# transaction.register_dirty(history)
1093
transaction.map.add_revision_history(rev_history)
1094
# this call is disabled because revision_history is
1095
# not really an object yet, and the transaction is for objects.
1096
# transaction.register_clean(history)
1099
def revision_history(self):
1100
"""See Branch.revision_history."""
1101
transaction = self.get_transaction()
1102
history = transaction.map.find_revision_history()
1103
if history is not None:
1104
# mutter("cache hit for revision-history in %s", self)
1105
return list(history)
1106
decode_utf8 = cache_utf8.decode
1107
history = [decode_utf8(l.rstrip('\r\n')) for l in
1108
self.control_files.get('revision-history').readlines()]
1109
transaction.map.add_revision_history(history)
1110
# this call is disabled because revision_history is
1111
# not really an object yet, and the transaction is for objects.
1112
# transaction.register_clean(history, precious=True)
1113
return list(history)
1116
def generate_revision_history(self, revision_id, last_rev=None,
1118
"""Create a new revision history that will finish with revision_id.
1120
:param revision_id: the new tip to use.
1121
:param last_rev: The previous last_revision. If not None, then this
1122
must be a ancestory of revision_id, or DivergedBranches is raised.
1123
:param other_branch: The other branch that DivergedBranches should
1124
raise with respect to.
1126
# stop_revision must be a descendant of last_revision
1127
stop_graph = self.repository.get_revision_graph(revision_id)
1128
if last_rev is not None and last_rev not in stop_graph:
1129
# our previous tip is not merged into stop_revision
1130
raise errors.DivergedBranches(self, other_branch)
1131
# make a new revision history from the graph
1132
current_rev_id = revision_id
1134
while current_rev_id not in (None, revision.NULL_REVISION):
1135
new_history.append(current_rev_id)
1136
current_rev_id_parents = stop_graph[current_rev_id]
1138
current_rev_id = current_rev_id_parents[0]
1140
current_rev_id = None
1141
new_history.reverse()
1142
self.set_revision_history(new_history)
1145
def update_revisions(self, other, stop_revision=None):
1146
"""See Branch.update_revisions."""
1149
if stop_revision is None:
1150
stop_revision = other.last_revision()
1151
if stop_revision is None:
1152
# if there are no commits, we're done.
1154
# whats the current last revision, before we fetch [and change it
1156
last_rev = self.last_revision()
1157
# we fetch here regardless of whether we need to so that we pickup
1159
self.fetch(other, stop_revision)
1160
my_ancestry = self.repository.get_ancestry(last_rev)
1161
if stop_revision in my_ancestry:
1162
# last_revision is a descendant of stop_revision
1164
self.generate_revision_history(stop_revision, last_rev=last_rev,
1169
def basis_tree(self):
1170
"""See Branch.basis_tree."""
1171
return self.repository.revision_tree(self.last_revision())
1173
@deprecated_method(zero_eight)
1174
def working_tree(self):
1175
"""Create a Working tree object for this branch."""
1177
from bzrlib.transport.local import LocalTransport
1178
if (self.base.find('://') != -1 or
1179
not isinstance(self._transport, LocalTransport)):
1180
raise NoWorkingTree(self.base)
1181
return self.bzrdir.open_workingtree()
1184
def pull(self, source, overwrite=False, stop_revision=None):
1185
"""See Branch.pull."""
1188
old_count = len(self.revision_history())
1190
self.update_revisions(source,stop_revision)
1191
except DivergedBranches:
1195
self.set_revision_history(source.revision_history())
1196
new_count = len(self.revision_history())
1197
return new_count - old_count
1201
def get_parent(self):
1202
"""See Branch.get_parent."""
1204
_locs = ['parent', 'pull', 'x-pull']
1205
assert self.base[-1] == '/'
1208
parent = self.control_files.get(l).read().strip('\n')
1211
# This is an old-format absolute path to a local branch
1212
# turn it into a url
1213
if parent.startswith('/'):
1214
parent = urlutils.local_path_to_url(parent.decode('utf8'))
1216
return urlutils.join(self.base[:-1], parent)
1217
except errors.InvalidURLJoin, e:
1218
raise errors.InaccessibleParent(parent, self.base)
1221
def get_push_location(self):
1222
"""See Branch.get_push_location."""
1223
push_loc = self.get_config().get_user_option('push_location')
1226
def set_push_location(self, location):
1227
"""See Branch.set_push_location."""
1228
self.get_config().set_user_option('push_location', location,
1232
def set_parent(self, url):
1233
"""See Branch.set_parent."""
1234
# TODO: Maybe delete old location files?
1235
# URLs should never be unicode, even on the local fs,
1236
# FIXUP this and get_parent in a future branch format bump:
1237
# read and rewrite the file, and have the new format code read
1238
# using .get not .get_utf8. RBC 20060125
1240
self.control_files._transport.delete('parent')
1242
if isinstance(url, unicode):
1244
url = url.encode('ascii')
1245
except UnicodeEncodeError:
1246
raise bzrlib.errors.InvalidURL(url,
1247
"Urls must be 7-bit ascii, "
1248
"use bzrlib.urlutils.escape")
1250
url = urlutils.relative_url(self.base, url)
1251
self.control_files.put('parent', StringIO(url + '\n'))
1253
@deprecated_function(zero_nine)
1254
def tree_config(self):
1255
"""DEPRECATED; call get_config instead.
1256
TreeConfig has become part of BranchConfig."""
1257
return TreeConfig(self)
1260
class BzrBranch5(BzrBranch):
1261
"""A format 5 branch. This supports new features over plan branches.
1263
It has support for a master_branch which is the data for bound branches.
1271
super(BzrBranch5, self).__init__(_format=_format,
1272
_control_files=_control_files,
1274
_repository=_repository)
1277
def pull(self, source, overwrite=False, stop_revision=None):
1278
"""Updates branch.pull to be bound branch aware."""
1279
bound_location = self.get_bound_location()
1280
if source.base != bound_location:
1281
# not pulling from master, so we need to update master.
1282
master_branch = self.get_master_branch()
1284
master_branch.pull(source)
1285
source = master_branch
1286
return super(BzrBranch5, self).pull(source, overwrite, stop_revision)
1288
def get_bound_location(self):
1290
return self.control_files.get_utf8('bound').read()[:-1]
1291
except errors.NoSuchFile:
1295
def get_master_branch(self):
1296
"""Return the branch we are bound to.
1298
:return: Either a Branch, or None
1300
This could memoise the branch, but if thats done
1301
it must be revalidated on each new lock.
1302
So for now we just don't memoise it.
1303
# RBC 20060304 review this decision.
1305
bound_loc = self.get_bound_location()
1309
return Branch.open(bound_loc)
1310
except (errors.NotBranchError, errors.ConnectionError), e:
1311
raise errors.BoundBranchConnectionFailure(
1315
def set_bound_location(self, location):
1316
"""Set the target where this branch is bound to.
1318
:param location: URL to the target branch
1321
self.control_files.put_utf8('bound', location+'\n')
1324
self.control_files._transport.delete('bound')
1330
def bind(self, other):
1331
"""Bind the local branch the other branch.
1333
:param other: The branch to bind to
1336
# TODO: jam 20051230 Consider checking if the target is bound
1337
# It is debatable whether you should be able to bind to
1338
# a branch which is itself bound.
1339
# Committing is obviously forbidden,
1340
# but binding itself may not be.
1341
# Since we *have* to check at commit time, we don't
1342
# *need* to check here
1345
# we are now equal to or a suffix of other.
1347
# Since we have 'pulled' from the remote location,
1348
# now we should try to pull in the opposite direction
1349
# in case the local tree has more revisions than the
1351
# There may be a different check you could do here
1352
# rather than actually trying to install revisions remotely.
1353
# TODO: capture an exception which indicates the remote branch
1355
# If it is up-to-date, this probably should not be a failure
1357
# lock other for write so the revision-history syncing cannot race
1361
# if this does not error, other now has the same last rev we do
1362
# it can only error if the pull from other was concurrent with
1363
# a commit to other from someone else.
1365
# until we ditch revision-history, we need to sync them up:
1366
self.set_revision_history(other.revision_history())
1367
# now other and self are up to date with each other and have the
1368
# same revision-history.
1372
self.set_bound_location(other.base)
1376
"""If bound, unbind"""
1377
return self.set_bound_location(None)
1381
"""Synchronise this branch with the master branch if any.
1383
:return: None or the last_revision that was pivoted out during the
1386
master = self.get_master_branch()
1387
if master is not None:
1388
old_tip = self.last_revision()
1389
self.pull(master, overwrite=True)
1390
if old_tip in self.repository.get_ancestry(self.last_revision()):
1396
class BranchTestProviderAdapter(object):
1397
"""A tool to generate a suite testing multiple branch formats at once.
1399
This is done by copying the test once for each transport and injecting
1400
the transport_server, transport_readonly_server, and branch_format
1401
classes into each copy. Each copy is also given a new id() to make it
1405
def __init__(self, transport_server, transport_readonly_server, formats):
1406
self._transport_server = transport_server
1407
self._transport_readonly_server = transport_readonly_server
1408
self._formats = formats
1410
def adapt(self, test):
1411
result = TestSuite()
1412
for branch_format, bzrdir_format in self._formats:
1413
new_test = deepcopy(test)
1414
new_test.transport_server = self._transport_server
1415
new_test.transport_readonly_server = self._transport_readonly_server
1416
new_test.bzrdir_format = bzrdir_format
1417
new_test.branch_format = branch_format
1418
def make_new_test_id():
1419
new_id = "%s(%s)" % (new_test.id(), branch_format.__class__.__name__)
1420
return lambda: new_id
1421
new_test.id = make_new_test_id()
1422
result.addTest(new_test)
1426
class BranchCheckResult(object):
1427
"""Results of checking branch consistency.
1432
def __init__(self, branch):
1433
self.branch = branch
1435
def report_results(self, verbose):
1436
"""Report the check results via trace.note.
1438
:param verbose: Requests more detailed display of what was checked,
1441
note('checked branch %s format %s',
1443
self.branch._format)
1446
######################################################################
1450
@deprecated_function(zero_eight)
1451
def is_control_file(*args, **kwargs):
1452
"""See bzrlib.workingtree.is_control_file."""
1453
return bzrlib.workingtree.is_control_file(*args, **kwargs)
added
removed
bzrlib/branch.py
