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# Copyright (C) 2006 Canonical Ltd
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
"""Implementation of Transport that adapts another transport to be readonly."""
from bzrlib.errors import TransportNotPossible
from bzrlib.transport import get_transport, Transport, Server
class ReadonlyTransportDecorator(Transport):
"""A decorator that can convert any transport to be readonly.
This does not use __getattr__ hacks as we need to ensure that
new writable methods are overridden correctly.
"""
def __init__(self, url, _decorated=None):
"""Set the 'base' path where files will be stored.
_decorated is a private parameter for cloning."""
assert url.startswith('readonly+')
decorated_url = url[len('readonly+'):]
if _decorated is None:
self._decorated = get_transport(decorated_url)
else:
self._decorated = _decorated
super(ReadonlyTransportDecorator, self).__init__(
"readonly+" + self._decorated.base)
def clone(self, offset=None):
"""See Transport.clone()."""
decorated_clone = self._decorated.clone(offset)
return ReadonlyTransportDecorator("readonly+" + decorated_clone.base,
decorated_clone)
def abspath(self, relpath):
"""See Transport.abspath()."""
return "readonly+" + self._decorated.abspath(relpath)
def append(self, relpath, f):
"""See Transport.append()."""
raise TransportNotPossible('readonly transport')
def has(self, relpath):
"""See Transport.has()."""
return self._decorated.has(relpath)
def delete(self, relpath):
"""See Transport.delete()."""
raise TransportNotPossible('readonly transport')
def delete_tree(self, relpath):
"""See Transport.delete_tree()."""
raise TransportNotPossible('readonly transport')
def get(self, relpath):
"""See Transport.get()."""
return self._decorated.get(relpath)
def put(self, relpath, f, mode=None):
"""See Transport.put()."""
raise TransportNotPossible('readonly transport')
def mkdir(self, relpath, mode=None):
"""See Transport.mkdir()."""
raise TransportNotPossible('readonly transport')
def is_readonly(self):
"""See Transport.is_readonly."""
return True
def listable(self):
"""See Transport.listable."""
return self._decorated.listable()
def iter_files_recursive(self):
"""See Transport.iter_files_recursive()."""
return self._decorated.iter_files_recursive()
def list_dir(self, relpath):
"""See Transport.list_dir()."""
return self._decorated.list_dir(relpath)
def rmdir(self, relpath):
"""See Transport.rmdir."""
raise TransportNotPossible('readonly transport')
def should_cache(self):
"""See Transport.should_cache()."""
return self._decorated.should_cache()
def stat(self, relpath):
"""See Transport.stat()."""
return self._decorated.stat(relpath)
def lock_read(self, relpath):
"""See Transport.lock_read."""
return self._decorated.lock_read(relpath)
def lock_write(self, relpath):
"""See Transport.lock_write."""
raise TransportNotPossible('readonly transport')
class ReadonlyServer(Server):
"""Server for the ReadonlyTransportDecorator for testing with."""
def setUp(self, server=None):
"""See bzrlib.transport.Server.setUp.
:server: decorate the urls given by server. If not provided a
LocalServer is created.
"""
if server is not None:
self._made_server = False
self._server = server
else:
from bzrlib.transport.local import LocalRelpathServer
self._made_server = True
self._server = LocalRelpathServer()
self._server.setUp()
def tearDown(self):
"""See bzrlib.transport.Server.tearDown."""
if self._made_server:
self._server.tearDown()
def get_bogus_url(self):
"""See bzrlib.transport.Server.get_bogus_url."""
return "readonly+" + self._server.get_bogus_url()
def get_url(self):
"""See bzrlib.transport.Server.get_url."""
return "readonly+" + self._server.get_url()
def get_test_permutations():
"""Return the permutations to be used in testing."""
return [(ReadonlyTransportDecorator, ReadonlyServer),
]
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