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  • Committer: Jelmer Vernooij
  • Date: 2020-05-24 00:39:50 UTC
  • mto: This revision was merged to the branch mainline in revision 7504.
  • Revision ID: jelmer@jelmer.uk-20200524003950-bbc545r76vc5yajg
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breezy/transport/readonly.py
 
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# Copyright (C) 2006, 2007, 2009, 2010, 2011, 2016 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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# 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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#
 
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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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#
 
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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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"""Implementation of Transport that adapts another transport to be readonly."""
 
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from ..errors import TransportNotPossible, NoSmartMedium
 
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from ..transport import decorator
 
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class ReadonlyTransportDecorator(decorator.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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    """
 
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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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        return 'readonly+'
 
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    def rename(self, rel_from, rel_to):
 
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        """See Transport.rename."""
 
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        raise TransportNotPossible('readonly transport')
 
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    def delete(self, relpath):
 
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        """See Transport.delete()."""
 
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        raise TransportNotPossible('readonly transport')
 
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    def delete_tree(self, relpath):
 
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        """See Transport.delete_tree()."""
 
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        raise TransportNotPossible('readonly transport')
 
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    def put_file(self, relpath, f, mode=None):
 
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        """See Transport.put_file()."""
 
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        raise TransportNotPossible('readonly transport')
 
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    def put_bytes(self, relpath, bytes, mode=None):
 
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        """See Transport.put_bytes()."""
 
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        raise TransportNotPossible('readonly transport')
 
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    def mkdir(self, relpath, mode=None):
 
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        """See Transport.mkdir()."""
 
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        raise TransportNotPossible('readonly transport')
 
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    def open_write_stream(self, relpath, mode=None):
 
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        """See Transport.open_write_stream()."""
 
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        raise TransportNotPossible('readonly transport')
 
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    def is_readonly(self):
 
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        """See Transport.is_readonly."""
 
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        return True
 
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    def rmdir(self, relpath):
 
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        """See Transport.rmdir."""
 
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        raise TransportNotPossible('readonly transport')
 
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    def lock_write(self, relpath):
 
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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 NoSmartMedium(self)
 
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    def get_smart_medium(self):
 
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        raise NoSmartMedium(self)
 
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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 ..tests import test_server
 
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    return [(ReadonlyTransportDecorator, test_server.ReadonlyServer)]