~bzr-pqm/bzr/bzr.dev

# Copyright (C) 2005, 2006, 2008 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA

"""Transport implementation that adapts another transport to look like NFS.

Currently this means that the rename() call will raise ResourceBusy when a

target path is a directory.

To get a fake nfs transport use get_transport('fakenfs+' + real_url)

"""

from stat import S_ISDIR

from bzrlib import (

    errors,

    urlutils,

    )

from bzrlib.transport.decorator import TransportDecorator, DecoratorServer

class FakeNFSTransportDecorator(TransportDecorator):

    """A transport that behaves like NFS, for testing"""

    @classmethod

    def _get_url_prefix(self):

        """FakeNFS transports are identified by 'fakenfs+'"""

        return 'fakenfs+'

    def rename(self, rel_from, rel_to):

        """See Transport.rename().

        This variation on rename converts DirectoryNotEmpty and FileExists

        errors into ResourceBusy if the target is a directory.

        """

        try:

            self._decorated.rename(rel_from, rel_to)

        except (errors.DirectoryNotEmpty, errors.FileExists), e:

            # if this is a directory rename, raise

            # resourcebusy rather than DirectoryNotEmpty

            stat = self._decorated.stat(rel_to)

            if S_ISDIR(stat.st_mode):

                raise errors.ResourceBusy(rel_to)

            else:

                raise

    def delete(self, relpath):

        if urlutils.basename(relpath).startswith('.nfs'):

            raise errors.ResourceBusy(self.abspath(relpath))

        return self._decorated.delete(relpath)

class FakeNFSServer(DecoratorServer):

    """Server for the FakeNFSTransportDecorator for testing with."""

    def get_decorator_class(self):

        return FakeNFSTransportDecorator

def get_test_permutations():

    """Return the permutations to be used in testing."""

    return [(FakeNFSTransportDecorator, FakeNFSServer),

            ]