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bzrlib/transport/readonly.py
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# Copyright (C) 2006, 2009 Canonical Ltd
 
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# Copyright (C) 2006 Canonical Ltd
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#
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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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#
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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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# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
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"""Implementation of Transport that adapts another transport to be readonly."""
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from bzrlib.errors import TransportNotPossible, NoSmartMedium
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from bzrlib.transport import decorator
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class ReadonlyTransportDecorator(decorator.TransportDecorator):
 
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from bzrlib.errors import TransportNotPossible
 
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from bzrlib.transport.decorator import TransportDecorator, DecoratorServer
 
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class ReadonlyTransportDecorator(TransportDecorator):
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    """A decorator that can convert any transport to be readonly.
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    This is requested via the 'readonly+' prefix to get_transport().
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    def append_file(self, relpath, f, mode=None):
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        """See Transport.append_file()."""
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        raise TransportNotPossible('readonly transport')
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    def append_bytes(self, relpath, bytes, mode=None):
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        """See Transport.append_bytes()."""
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        raise TransportNotPossible('readonly transport')
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    @classmethod
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    def _get_url_prefix(self):
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        """Readonly transport decorators are invoked via 'readonly+'"""
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        """See Transport.lock_write."""
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        raise TransportNotPossible('readonly transport')
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    def get_smart_client(self):
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        raise NoSmartServer(self.base)
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    def get_smart_medium(self):
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        raise NoSmartMedium(self)
 
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class ReadonlyServer(DecoratorServer):
 
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    """Server for the ReadonlyTransportDecorator for testing with."""
 
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    def get_decorator_class(self):
 
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        return ReadonlyTransportDecorator
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def get_test_permutations():
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    """Return the permutations to be used in testing."""
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    from bzrlib.tests import test_server
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    return [(ReadonlyTransportDecorator, test_server.ReadonlyServer),]
 
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    return [(ReadonlyTransportDecorator, ReadonlyServer),
 
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            ]