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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, NoSmartServer, NoSmartMedium
from bzrlib.transport.decorator import TransportDecorator, DecoratorServer
class ReadonlyTransportDecorator(TransportDecorator):
"""A decorator that can convert any transport to be readonly.
This is requested via the 'readonly+' prefix to get_transport().
"""
def append_file(self, relpath, f, mode=None):
"""See Transport.append_file()."""
raise TransportNotPossible('readonly transport')
def append_bytes(self, relpath, bytes, mode=None):
"""See Transport.append_bytes()."""
raise TransportNotPossible('readonly transport')
@classmethod
def _get_url_prefix(self):
"""Readonly transport decorators are invoked via 'readonly+'"""
return 'readonly+'
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 put_file(self, relpath, f, mode=None):
"""See Transport.put_file()."""
raise TransportNotPossible('readonly transport')
def put_bytes(self, relpath, bytes, mode=None):
"""See Transport.put_bytes()."""
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 rmdir(self, relpath):
"""See Transport.rmdir."""
raise TransportNotPossible('readonly transport')
def lock_write(self, relpath):
"""See Transport.lock_write."""
raise TransportNotPossible('readonly transport')
def get_smart_client(self):
raise NoSmartServer(self.base)
def get_smart_medium(self):
raise NoSmartMedium(self)
class ReadonlyServer(DecoratorServer):
"""Server for the ReadonlyTransportDecorator for testing with."""
def get_decorator_class(self):
return ReadonlyTransportDecorator
def get_test_permutations():
"""Return the permutations to be used in testing."""
return [(ReadonlyTransportDecorator, ReadonlyServer),
]
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