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# Copyright (C) 2008, 2009, 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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"""Directory service registration and usage.
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Directory services are utilities that provide a mapping from URL-like strings
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to true URLs. Examples include lp:urls and per-user location aliases.
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from __future__ import absolute_import
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from bzrlib.lazy_import import lazy_import
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lazy_import(globals(), """
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branch as _mod_branch,
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class DirectoryServiceRegistry(registry.Registry):
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"""This object maintains and uses a list of directory services.
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Directory services may be registered via the standard Registry methods.
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They will be invoked if their key is a prefix of the supplied URL.
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Each item registered should be a factory of objects that provide a look_up
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method, as invoked by dereference. Specifically, look_up should accept a
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name and URL, and return a URL.
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def dereference(self, url):
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"""Dereference a supplied URL if possible.
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URLs that match a registered directory service prefix are looked up in
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it. Non-matching urls are returned verbatim.
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This is applied only once; the resulting URL must not be one that
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requires further dereferencing.
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:param url: The URL to dereference
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:return: The dereferenced URL if applicable, the input URL otherwise.
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match = self.get_prefix(url)
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return service().look_up(name, url)
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directories = DirectoryServiceRegistry()
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class AliasDirectory(object):
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"""Directory lookup for locations associated with a branch.
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:parent, :submit, :public, :push, :this, and :bound are currently
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supported. On error, a subclass of DirectoryLookupFailure will be raised.
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branch_aliases = registry.Registry()
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branch_aliases.register('parent', lambda b: b.get_parent(),
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help="The parent of this branch.")
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branch_aliases.register('submit', lambda b: b.get_submit_branch(),
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help="The submit branch for this branch.")
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branch_aliases.register('public', lambda b: b.get_public_branch(),
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help="The public location of this branch.")
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branch_aliases.register('bound', lambda b: b.get_bound_location(),
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help="The branch this branch is bound to, for bound branches.")
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branch_aliases.register('push', lambda b: b.get_push_location(),
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help="The saved location used for `bzr push` with no arguments.")
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branch_aliases.register('this', lambda b: b.base,
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def look_up(self, name, url):
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branch = _mod_branch.Branch.open_containing('.')[0]
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parts = url.split('/', 1)
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method = self.branch_aliases.get(name[1:])
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raise errors.InvalidLocationAlias(url)
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result = method(branch)
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raise errors.UnsetLocationAlias(url)
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if extra is not None:
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result = urlutils.join(result, extra)
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def help_text(cls, topic):
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for key in cls.branch_aliases.keys():
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help = cls.branch_aliases.get_help(key)
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alias_lines.append(" :%-10s%s\n" % (key, help))
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Bazaar defines several aliases for locations associated with a branch. These
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can be used with most commands that expect a location, such as `bzr push`.
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For example, to push to the parent location::
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""" % "".join(alias_lines)
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directories.register(':', AliasDirectory,
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'Easy access to remembered branch locations')