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# Copyright (C) 2010, 2011 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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"""ControlDir is the basic control directory class.
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The ControlDir class is the base for the control directory used
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by all bzr and foreign formats. For the ".bzr" implementation,
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see bzrlib.bzrdir.BzrDir.
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from bzrlib.lazy_import import lazy_import
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lazy_import(globals(), """
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revision as _mod_revision,
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transport as _mod_transport,
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from bzrlib.push import (
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from bzrlib.trace import (
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from bzrlib.transport import (
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from bzrlib import registry
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class ControlComponent(object):
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"""Abstract base class for control directory components.
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This provides interfaces that are common across controldirs,
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repositories, branches, and workingtree control directories.
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They all expose two urls and transports: the *user* URL is the
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one that stops above the control directory (eg .bzr) and that
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should normally be used in messages, and the *control* URL is
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under that in eg .bzr/checkout and is used to read the control
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This can be used as a mixin and is intended to fit with
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def control_transport(self):
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raise NotImplementedError
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def control_url(self):
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return self.control_transport.base
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def user_transport(self):
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raise NotImplementedError
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return self.user_transport.base
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class ControlDir(ControlComponent):
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"""A control directory.
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While this represents a generic control directory, there are a few
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features that are present in this interface that are currently only
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supported by one of its implementations, BzrDir.
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These features (bound branches, stacked branches) are currently only
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supported by Bazaar, but could be supported by other version control
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systems as well. Implementations are required to raise the appropriate
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exceptions when an operation is requested that is not supported.
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This also makes life easier for API users who can rely on the
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implementation always allowing a particular feature to be requested but
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raising an exception when it is not supported, rather than requiring the
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API users to check for magic attributes to see what features are supported.
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def can_convert_format(self):
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"""Return true if this controldir is one whose format we can convert
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def list_branches(self):
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"""Return a sequence of all branches local to this control directory.
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return [self.open_branch()]
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except (errors.NotBranchError, errors.NoRepositoryPresent):
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def is_control_filename(self, filename):
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"""True if filename is the name of a path which is reserved for
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:param filename: A filename within the root transport of this
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This is true IF and ONLY IF the filename is part of the namespace reserved
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for bzr control dirs. Currently this is the '.bzr' directory in the root
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of the root_transport. it is expected that plugins will need to extend
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this in the future - for instance to make bzr talk with svn working
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raise NotImplementedError(self.is_control_filename)
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def needs_format_conversion(self, format=None):
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"""Return true if this controldir needs convert_format run on it.
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For instance, if the repository format is out of date but the
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branch and working tree are not, this should return True.
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:param format: Optional parameter indicating a specific desired
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format we plan to arrive at.
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raise NotImplementedError(self.needs_format_conversion)
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def create_repository(self, shared=False):
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"""Create a new repository in this control directory.
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:param shared: If a shared repository should be created
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:return: The newly created repository
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raise NotImplementedError(self.create_repository)
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def destroy_repository(self):
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"""Destroy the repository in this ControlDir."""
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raise NotImplementedError(self.destroy_repository)
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def create_branch(self, name=None, repository=None):
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"""Create a branch in this ControlDir.
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:param name: Name of the colocated branch to create, None for
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The controldirs format will control what branch format is created.
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For more control see BranchFormatXX.create(a_controldir).
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raise NotImplementedError(self.create_branch)
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def destroy_branch(self, name=None):
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"""Destroy a branch in this ControlDir.
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:param name: Name of the branch to destroy, None for the default
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raise NotImplementedError(self.destroy_branch)
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def create_workingtree(self, revision_id=None, from_branch=None,
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accelerator_tree=None, hardlink=False):
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"""Create a working tree at this ControlDir.
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:param revision_id: create it as of this revision id.
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:param from_branch: override controldir branch
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(for lightweight checkouts)
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:param accelerator_tree: A tree which can be used for retrieving file
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contents more quickly than the revision tree, i.e. a workingtree.
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The revision tree will be used for cases where accelerator_tree's
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content is different.
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raise NotImplementedError(self.create_workingtree)
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def destroy_workingtree(self):
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"""Destroy the working tree at this ControlDir.
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Formats that do not support this may raise UnsupportedOperation.
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raise NotImplementedError(self.destroy_workingtree)
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def destroy_workingtree_metadata(self):
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"""Destroy the control files for the working tree at this ControlDir.
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The contents of working tree files are not affected.
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Formats that do not support this may raise UnsupportedOperation.
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raise NotImplementedError(self.destroy_workingtree_metadata)
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def get_branch_reference(self, name=None):
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"""Return the referenced URL for the branch in this controldir.
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:param name: Optional colocated branch name
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:raises NotBranchError: If there is no Branch.
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:raises NoColocatedBranchSupport: If a branch name was specified
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but colocated branches are not supported.
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:return: The URL the branch in this controldir references if it is a
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reference branch, or None for regular branches.
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raise errors.NoColocatedBranchSupport(self)
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def open_branch(self, name=None, unsupported=False,
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ignore_fallbacks=False):
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"""Open the branch object at this ControlDir if one is present.
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If unsupported is True, then no longer supported branch formats can
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TODO: static convenience version of this?
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raise NotImplementedError(self.open_branch)
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def open_repository(self, _unsupported=False):
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"""Open the repository object at this ControlDir if one is present.
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This will not follow the Branch object pointer - it's strictly a direct
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open facility. Most client code should use open_branch().repository to
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:param _unsupported: a private parameter, not part of the api.
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TODO: static convenience version of this?
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raise NotImplementedError(self.open_repository)
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def find_repository(self):
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"""Find the repository that should be used.
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This does not require a branch as we use it to find the repo for
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new branches as well as to hook existing branches up to their
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raise NotImplementedError(self.find_repository)
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def open_workingtree(self, _unsupported=False,
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recommend_upgrade=True, from_branch=None):
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"""Open the workingtree object at this ControlDir if one is present.
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:param recommend_upgrade: Optional keyword parameter, when True (the
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default), emit through the ui module a recommendation that the user
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upgrade the working tree when the workingtree being opened is old
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(but still fully supported).
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:param from_branch: override controldir branch (for lightweight
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raise NotImplementedError(self.open_workingtree)
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def has_branch(self, name=None):
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"""Tell if this controldir contains a branch.
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Note: if you're going to open the branch, you should just go ahead
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and try, and not ask permission first. (This method just opens the
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branch and discards it, and that's somewhat expensive.)
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self.open_branch(name)
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except errors.NotBranchError:
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def has_workingtree(self):
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"""Tell if this controldir contains a working tree.
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This will still raise an exception if the controldir has a workingtree
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that is remote & inaccessible.
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Note: if you're going to open the working tree, you should just go ahead
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and try, and not ask permission first. (This method just opens the
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workingtree and discards it, and that's somewhat expensive.)
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self.open_workingtree(recommend_upgrade=False)
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except errors.NoWorkingTree:
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def cloning_metadir(self, require_stacking=False):
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"""Produce a metadir suitable for cloning or sprouting with.
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These operations may produce workingtrees (yes, even though they're
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"cloning" something that doesn't have a tree), so a viable workingtree
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format must be selected.
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:require_stacking: If True, non-stackable formats will be upgraded
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to similar stackable formats.
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:returns: a ControlDirFormat with all component formats either set
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appropriately or set to None if that component should not be
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raise NotImplementedError(self.cloning_metadir)
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def checkout_metadir(self):
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"""Produce a metadir suitable for checkouts of this controldir."""
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return self.cloning_metadir()
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def sprout(self, url, revision_id=None, force_new_repo=False,
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recurse='down', possible_transports=None,
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accelerator_tree=None, hardlink=False, stacked=False,
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source_branch=None, create_tree_if_local=True):
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"""Create a copy of this controldir prepared for use as a new line of
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If url's last component does not exist, it will be created.
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Attributes related to the identity of the source branch like
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branch nickname will be cleaned, a working tree is created
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whether one existed before or not; and a local branch is always
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if revision_id is not None, then the clone operation may tune
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itself to download less data.
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:param accelerator_tree: A tree which can be used for retrieving file
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contents more quickly than the revision tree, i.e. a workingtree.
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The revision tree will be used for cases where accelerator_tree's
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content is different.
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:param hardlink: If true, hard-link files from accelerator_tree,
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:param stacked: If true, create a stacked branch referring to the
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location of this control directory.
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:param create_tree_if_local: If true, a working-tree will be created
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when working locally.
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operation = cleanup.OperationWithCleanups(self._sprout)
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return operation.run(url, revision_id=revision_id,
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force_new_repo=force_new_repo, recurse=recurse,
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possible_transports=possible_transports,
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accelerator_tree=accelerator_tree, hardlink=hardlink,
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stacked=stacked, source_branch=source_branch,
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create_tree_if_local=create_tree_if_local)
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def _sprout(self, op, url, revision_id=None, force_new_repo=False,
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recurse='down', possible_transports=None,
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accelerator_tree=None, hardlink=False, stacked=False,
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source_branch=None, create_tree_if_local=True):
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add_cleanup = op.add_cleanup
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fetch_spec_factory = fetch.FetchSpecFactory()
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if revision_id is not None:
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fetch_spec_factory.add_revision_ids([revision_id])
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fetch_spec_factory.source_branch_stop_revision_id = revision_id
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target_transport = _mod_transport.get_transport(url,
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target_transport.ensure_base()
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cloning_format = self.cloning_metadir(stacked)
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# Create/update the result branch
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result = cloning_format.initialize_on_transport(target_transport)
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source_branch, source_repository = self._find_source_repo(
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add_cleanup, source_branch)
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fetch_spec_factory.source_branch = source_branch
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# if a stacked branch wasn't requested, we don't create one
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# even if the origin was stacked
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if stacked and source_branch is not None:
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stacked_branch_url = self.root_transport.base
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stacked_branch_url = None
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repository_policy = result.determine_repository_policy(
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force_new_repo, stacked_branch_url, require_stacking=stacked)
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result_repo, is_new_repo = repository_policy.acquire_repository()
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add_cleanup(result_repo.lock_write().unlock)
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fetch_spec_factory.source_repo = source_repository
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fetch_spec_factory.target_repo = result_repo
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if stacked or (len(result_repo._fallback_repositories) != 0):
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target_repo_kind = fetch.TargetRepoKinds.STACKED
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target_repo_kind = fetch.TargetRepoKinds.EMPTY
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target_repo_kind = fetch.TargetRepoKinds.PREEXISTING
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fetch_spec_factory.target_repo_kind = target_repo_kind
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if source_repository is not None:
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fetch_spec = fetch_spec_factory.make_fetch_spec()
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result_repo.fetch(source_repository, fetch_spec=fetch_spec)
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if source_branch is None:
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# this is for sprouting a controldir without a branch; is that
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# Not especially, but it's part of the contract.
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result_branch = result.create_branch()
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result_branch = source_branch.sprout(result,
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revision_id=revision_id, repository_policy=repository_policy,
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repository=result_repo)
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mutter("created new branch %r" % (result_branch,))
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# Create/update the result working tree
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if (create_tree_if_local and
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isinstance(target_transport, local.LocalTransport) and
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(result_repo is None or result_repo.make_working_trees())):
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wt = result.create_workingtree(accelerator_tree=accelerator_tree,
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hardlink=hardlink, from_branch=result_branch)
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if wt.path2id('') is None:
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wt.set_root_id(self.open_workingtree.get_root_id())
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except errors.NoWorkingTree:
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if recurse == 'down':
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basis = wt.basis_tree()
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elif result_branch is not None:
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basis = result_branch.basis_tree()
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elif source_branch is not None:
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basis = source_branch.basis_tree()
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if basis is not None:
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add_cleanup(basis.lock_read().unlock)
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subtrees = basis.iter_references()
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for path, file_id in subtrees:
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target = urlutils.join(url, urlutils.escape(path))
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sublocation = source_branch.reference_parent(file_id, path)
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sublocation.bzrdir.sprout(target,
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basis.get_reference_revision(file_id, path),
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force_new_repo=force_new_repo, recurse=recurse,
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def _find_source_repo(self, add_cleanup, source_branch):
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"""Find the source branch and repo for a sprout operation.
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This is helper intended for use by _sprout.
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:returns: (source_branch, source_repository). Either or both may be
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None. If not None, they will be read-locked (and their unlock(s)
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scheduled via the add_cleanup param).
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if source_branch is not None:
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add_cleanup(source_branch.lock_read().unlock)
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return source_branch, source_branch.repository
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source_branch = self.open_branch()
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source_repository = source_branch.repository
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except errors.NotBranchError:
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source_repository = self.open_repository()
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except errors.NoRepositoryPresent:
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source_repository = None
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add_cleanup(source_repository.lock_read().unlock)
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add_cleanup(source_branch.lock_read().unlock)
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return source_branch, source_repository
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def push_branch(self, source, revision_id=None, overwrite=False,
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remember=False, create_prefix=False):
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"""Push the source branch into this ControlDir."""
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# If we can open a branch, use its direct repository, otherwise see
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# if there is a repository without a branch.
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br_to = self.open_branch()
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except errors.NotBranchError:
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# Didn't find a branch, can we find a repository?
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repository_to = self.find_repository()
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# Found a branch, so we must have found a repository
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repository_to = br_to.repository
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push_result = PushResult()
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push_result.source_branch = source
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# We have a repository but no branch, copy the revisions, and then
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repository_to.fetch(source.repository, revision_id=revision_id)
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br_to = source.clone(self, revision_id=revision_id)
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if source.get_push_location() is None or remember:
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source.set_push_location(br_to.base)
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push_result.stacked_on = None
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push_result.branch_push_result = None
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push_result.old_revno = None
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push_result.old_revid = _mod_revision.NULL_REVISION
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push_result.target_branch = br_to
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push_result.master_branch = None
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push_result.workingtree_updated = False
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# We have successfully opened the branch, remember if necessary:
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if source.get_push_location() is None or remember:
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source.set_push_location(br_to.base)
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tree_to = self.open_workingtree()
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except errors.NotLocalUrl:
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push_result.branch_push_result = source.push(br_to,
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overwrite, stop_revision=revision_id)
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push_result.workingtree_updated = False
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except errors.NoWorkingTree:
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push_result.branch_push_result = source.push(br_to,
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overwrite, stop_revision=revision_id)
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push_result.workingtree_updated = None # Not applicable
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push_result.branch_push_result = source.push(
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tree_to.branch, overwrite, stop_revision=revision_id)
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push_result.workingtree_updated = True
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push_result.old_revno = push_result.branch_push_result.old_revno
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push_result.old_revid = push_result.branch_push_result.old_revid
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push_result.target_branch = \
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push_result.branch_push_result.target_branch
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def _get_tree_branch(self, name=None):
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"""Return the branch and tree, if any, for this bzrdir.
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:param name: Name of colocated branch to open.
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Return None for tree if not present or inaccessible.
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Raise NotBranchError if no branch is present.
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:return: (tree, branch)
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tree = self.open_workingtree()
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except (errors.NoWorkingTree, errors.NotLocalUrl):
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branch = self.open_branch(name=name)
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branch = self.open_branch(name=name)
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def get_config(self):
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"""Get configuration for this ControlDir."""
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raise NotImplementedError(self.get_config)
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def check_conversion_target(self, target_format):
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"""Check that a bzrdir as a whole can be converted to a new format."""
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raise NotImplementedError(self.check_conversion_target)
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def clone(self, url, revision_id=None, force_new_repo=False,
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preserve_stacking=False):
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"""Clone this bzrdir and its contents to url verbatim.
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:param url: The url create the clone at. If url's last component does
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not exist, it will be created.
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:param revision_id: The tip revision-id to use for any branch or
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working tree. If not None, then the clone operation may tune
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itself to download less data.
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:param force_new_repo: Do not use a shared repository for the target
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even if one is available.
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:param preserve_stacking: When cloning a stacked branch, stack the
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new branch on top of the other branch's stacked-on branch.
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return self.clone_on_transport(_mod_transport.get_transport(url),
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revision_id=revision_id,
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force_new_repo=force_new_repo,
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preserve_stacking=preserve_stacking)
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def clone_on_transport(self, transport, revision_id=None,
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force_new_repo=False, preserve_stacking=False, stacked_on=None,
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create_prefix=False, use_existing_dir=True, no_tree=False):
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"""Clone this bzrdir and its contents to transport verbatim.
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:param transport: The transport for the location to produce the clone
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at. If the target directory does not exist, it will be created.
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:param revision_id: The tip revision-id to use for any branch or
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working tree. If not None, then the clone operation may tune
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itself to download less data.
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:param force_new_repo: Do not use a shared repository for the target,
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even if one is available.
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:param preserve_stacking: When cloning a stacked branch, stack the
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new branch on top of the other branch's stacked-on branch.
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:param create_prefix: Create any missing directories leading up to
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:param use_existing_dir: Use an existing directory if one exists.
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:param no_tree: If set to true prevents creation of a working tree.
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raise NotImplementedError(self.clone_on_transport)
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class ControlComponentFormat(object):
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"""A component that can live inside of a .bzr meta directory."""
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def get_format_string(self):
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"""Return the format of this format, if usable in meta directories."""
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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 description for this format."""
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raise NotImplementedError(self.get_format_description)
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class ControlComponentFormatRegistry(registry.FormatRegistry):
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"""A registry for control components (branch, workingtree, repository)."""
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def __init__(self, other_registry=None):
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super(ControlComponentFormatRegistry, self).__init__(other_registry)
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self._extra_formats = []
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def register(self, format):
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"""Register a new format."""
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super(ControlComponentFormatRegistry, self).register(
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format.get_format_string(), format)
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def remove(self, format):
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"""Remove a registered format."""
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super(ControlComponentFormatRegistry, self).remove(
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format.get_format_string())
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def register_extra(self, format):
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"""Register a format that can not be used in a metadir.
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This is mainly useful to allow custom repository formats, such as older
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Bazaar formats and foreign formats, to be tested.
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self._extra_formats.append(registry._ObjectGetter(format))
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def remove_extra(self, format):
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"""Remove an extra format.
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self._extra_formats.remove(registry._ObjectGetter(format))
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def register_extra_lazy(self, module_name, member_name):
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"""Register a format lazily.
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self._extra_formats.append(
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registry._LazyObjectGetter(module_name, member_name))
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def _get_extra(self):
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"""Return all "extra" formats, not usable in meta directories."""
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for getter in self._extra_formats:
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"""Return all formats, even those not usable in metadirs.
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for name in self.keys():
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return result + self._get_extra()
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def _get_all_modules(self):
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"""Return a set of the modules providing objects."""
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for name in self.keys():
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modules.add(self._get_module(name))
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for getter in self._extra_formats:
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modules.add(getter.get_module())
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class Converter(object):
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"""Converts a disk format object from one format to another."""
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def convert(self, to_convert, pb):
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"""Perform the conversion of to_convert, giving feedback via pb.
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:param to_convert: The disk object to convert.
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:param pb: a progress bar to use for progress information.
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def step(self, message):
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"""Update the pb by a step."""
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self.pb.update(message, self.count, self.total)
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class ControlDirFormat(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 a dict by their format string for reference
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during controldir opening. These should be subclasses of ControlDirFormat
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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 system load.
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:cvar colocated_branches: Whether this formats supports colocated branches.
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:cvar supports_workingtrees: This control directory can co-exist with a
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_default_format = None
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"""The default format used for new control directories."""
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"""The registered control formats - .bzr, ....
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This is a list of _ObjectGetters of ControlDirFormat objects.
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"""The registered server format probers, e.g. RemoteBzrProber.
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This is a list of Prober-derived classes.
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"""The registered format probers, e.g. BzrProber.
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This is a list of Prober-derived classes.
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colocated_branches = False
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"""Whether co-located branches are supported for this control dir format.
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supports_workingtrees = True
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"""Whether working trees can exist in control directories of this format.
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fixed_components = False
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"""Whether components can not change format independent of the control dir.
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def get_format_description(self):
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"""Return the short description for this format."""
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raise NotImplementedError(self.get_format_description)
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def get_converter(self, format=None):
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"""Return the converter to use to convert controldirs needing converts.
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This returns a bzrlib.controldir.Converter object.
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This should return the best upgrader to step this format towards the
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current default format. In the case of plugins we can/should provide
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some means for them to extend the range of returnable converters.
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:param format: Optional format to override the default format of the
759
raise NotImplementedError(self.get_converter)
761
def is_supported(self):
762
"""Is this format supported?
764
Supported formats must be initializable and openable.
765
Unsupported formats may not support initialization or committing or
766
some other features depending on the reason for not being supported.
770
def same_model(self, target_format):
771
return (self.repository_format.rich_root_data ==
772
target_format.rich_root_data)
775
def register_format(klass, format):
776
"""Register a control dir format.
779
klass._formats.append(registry._ObjectGetter(format))
782
def register_lazy_format(klass, module_name, member_name):
783
"""Lazily register a control dir format.
786
klass._formats.append(registry._LazyObjectGetter(
787
module_name, member_name))
790
def register_prober(klass, prober):
791
"""Register a prober that can look for a control dir.
794
klass._probers.append(prober)
797
def unregister_prober(klass, prober):
798
"""Unregister a prober.
801
klass._probers.remove(prober)
804
def register_server_prober(klass, prober):
805
"""Register a control format prober for client-server environments.
807
These probers will be used before ones registered with
808
register_prober. This gives implementations that decide to the
809
chance to grab it before anything looks at the contents of the format
812
klass._server_probers.append(prober)
816
return self.get_format_description().rstrip()
819
def unregister_format(klass, format):
820
klass._formats.remove(registry._ObjectGetter(format))
823
def unregister_lazy_format(klass, module_name, member_name):
824
klass._formats.remove(registry._LazyObjectGetter(
825
module_name, member_name))
828
def known_formats(klass):
829
"""Return all the known formats.
831
return set([objgetter.get_obj() for objgetter in klass._formats])
834
def find_format(klass, transport, _server_formats=True):
835
"""Return the format present at transport."""
837
_probers = klass._server_probers + klass._probers
839
_probers = klass._probers
840
for prober_kls in _probers:
841
prober = prober_kls()
843
return prober.probe_transport(transport)
844
except errors.NotBranchError:
845
# this format does not find a control dir here.
847
raise errors.NotBranchError(path=transport.base)
849
def initialize(self, url, possible_transports=None):
850
"""Create a control dir at this url and return an opened copy.
852
While not deprecated, this method is very specific and its use will
853
lead to many round trips to setup a working environment. See
854
initialize_on_transport_ex for a [nearly] all-in-one method.
856
Subclasses should typically override initialize_on_transport
857
instead of this method.
859
return self.initialize_on_transport(
860
_mod_transport.get_transport(url, possible_transports))
862
def initialize_on_transport(self, transport):
863
"""Initialize a new controldir in the base directory of a Transport."""
864
raise NotImplementedError(self.initialize_on_transport)
866
def initialize_on_transport_ex(self, transport, use_existing_dir=False,
867
create_prefix=False, force_new_repo=False, stacked_on=None,
868
stack_on_pwd=None, repo_format_name=None, make_working_trees=None,
869
shared_repo=False, vfs_only=False):
870
"""Create this format on transport.
872
The directory to initialize will be created.
874
:param force_new_repo: Do not use a shared repository for the target,
875
even if one is available.
876
:param create_prefix: Create any missing directories leading up to
878
:param use_existing_dir: Use an existing directory if one exists.
879
:param stacked_on: A url to stack any created branch on, None to follow
880
any target stacking policy.
881
:param stack_on_pwd: If stack_on is relative, the location it is
883
:param repo_format_name: If non-None, a repository will be
884
made-or-found. Should none be found, or if force_new_repo is True
885
the repo_format_name is used to select the format of repository to
887
:param make_working_trees: Control the setting of make_working_trees
888
for a new shared repository when one is made. None to use whatever
889
default the format has.
890
:param shared_repo: Control whether made repositories are shared or
892
:param vfs_only: If True do not attempt to use a smart server
893
:return: repo, controldir, require_stacking, repository_policy. repo is
894
None if none was created or found, controldir is always valid.
895
require_stacking is the result of examining the stacked_on
896
parameter and any stacking policy found for the target.
898
raise NotImplementedError(self.initialize_on_transport_ex)
900
def network_name(self):
901
"""A simple byte string uniquely identifying this format for RPC calls.
903
Bzr control formats use this disk format string to identify the format
904
over the wire. Its possible that other control formats have more
905
complex detection requirements, so we permit them to use any unique and
906
immutable string they desire.
908
raise NotImplementedError(self.network_name)
910
def open(self, transport, _found=False):
911
"""Return an instance of this format for the dir transport points at.
913
raise NotImplementedError(self.open)
916
def _set_default_format(klass, format):
917
"""Set default format (for testing behavior of defaults only)"""
918
klass._default_format = format
921
def get_default_format(klass):
922
"""Return the current default format."""
923
return klass._default_format
926
class Prober(object):
927
"""Abstract class that can be used to detect a particular kind of
930
At the moment this just contains a single method to probe a particular
931
transport, but it may be extended in the future to e.g. avoid
932
multiple levels of probing for Subversion repositories.
935
def probe_transport(self, transport):
936
"""Return the controldir style format present in a directory.
938
:raise UnknownFormatError: If a control dir was found but is
939
in an unknown format.
940
:raise NotBranchError: If no control directory was found.
941
:return: A ControlDirFormat instance.
943
raise NotImplementedError(self.probe_transport)
946
class ControlDirFormatInfo(object):
948
def __init__(self, native, deprecated, hidden, experimental):
949
self.deprecated = deprecated
952
self.experimental = experimental
955
class ControlDirFormatRegistry(registry.Registry):
956
"""Registry of user-selectable ControlDir subformats.
958
Differs from ControlDirFormat._formats in that it provides sub-formats,
959
e.g. BzrDirMeta1 with weave repository. Also, it's more user-oriented.
963
"""Create a ControlDirFormatRegistry."""
964
self._aliases = set()
965
self._registration_order = list()
966
super(ControlDirFormatRegistry, self).__init__()
969
"""Return a set of the format names which are aliases."""
970
return frozenset(self._aliases)
972
def register(self, key, factory, help, native=True, deprecated=False,
973
hidden=False, experimental=False, alias=False):
974
"""Register a ControlDirFormat factory.
976
The factory must be a callable that takes one parameter: the key.
977
It must produce an instance of the ControlDirFormat when called.
979
This function mainly exists to prevent the info object from being
982
registry.Registry.register(self, key, factory, help,
983
ControlDirFormatInfo(native, deprecated, hidden, experimental))
985
self._aliases.add(key)
986
self._registration_order.append(key)
988
def register_lazy(self, key, module_name, member_name, help, native=True,
989
deprecated=False, hidden=False, experimental=False, alias=False):
990
registry.Registry.register_lazy(self, key, module_name, member_name,
991
help, ControlDirFormatInfo(native, deprecated, hidden, experimental))
993
self._aliases.add(key)
994
self._registration_order.append(key)
996
def set_default(self, key):
997
"""Set the 'default' key to be a clone of the supplied key.
999
This method must be called once and only once.
1001
registry.Registry.register(self, 'default', self.get(key),
1002
self.get_help(key), info=self.get_info(key))
1003
self._aliases.add('default')
1005
def set_default_repository(self, key):
1006
"""Set the FormatRegistry default and Repository default.
1008
This is a transitional method while Repository.set_default_format
1011
if 'default' in self:
1012
self.remove('default')
1013
self.set_default(key)
1014
format = self.get('default')()
1016
def make_bzrdir(self, key):
1017
return self.get(key)()
1019
def help_topic(self, topic):
1021
default_realkey = None
1022
default_help = self.get_help('default')
1024
for key in self._registration_order:
1025
if key == 'default':
1027
help = self.get_help(key)
1028
if help == default_help:
1029
default_realkey = key
1031
help_pairs.append((key, help))
1033
def wrapped(key, help, info):
1035
help = '(native) ' + help
1036
return ':%s:\n%s\n\n' % (key,
1037
textwrap.fill(help, initial_indent=' ',
1038
subsequent_indent=' ',
1039
break_long_words=False))
1040
if default_realkey is not None:
1041
output += wrapped(default_realkey, '(default) %s' % default_help,
1042
self.get_info('default'))
1043
deprecated_pairs = []
1044
experimental_pairs = []
1045
for key, help in help_pairs:
1046
info = self.get_info(key)
1049
elif info.deprecated:
1050
deprecated_pairs.append((key, help))
1051
elif info.experimental:
1052
experimental_pairs.append((key, help))
1054
output += wrapped(key, help, info)
1055
output += "\nSee :doc:`formats-help` for more about storage formats."
1057
if len(experimental_pairs) > 0:
1058
other_output += "Experimental formats are shown below.\n\n"
1059
for key, help in experimental_pairs:
1060
info = self.get_info(key)
1061
other_output += wrapped(key, help, info)
1064
"No experimental formats are available.\n\n"
1065
if len(deprecated_pairs) > 0:
1066
other_output += "\nDeprecated formats are shown below.\n\n"
1067
for key, help in deprecated_pairs:
1068
info = self.get_info(key)
1069
other_output += wrapped(key, help, info)
1072
"\nNo deprecated formats are available.\n\n"
1074
"\nSee :doc:`formats-help` for more about storage formats."
1076
if topic == 'other-formats':
1082
# Please register new formats after old formats so that formats
1083
# appear in chronological order and format descriptions can build
1085
format_registry = ControlDirFormatRegistry()
1087
network_format_registry = registry.FormatRegistry()
1088
"""Registry of formats indexed by their network name.
1090
The network name for a ControlDirFormat is an identifier that can be used when
1091
referring to formats with smart server operations. See
1092
ControlDirFormat.network_name() for more detail.
added
removed
bzrlib/controldir.py
