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# Copyright (C) 2006 Canonical Ltd
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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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# 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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# 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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"""Fake transport with some restrictions of Windows VFAT filesystems.
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VFAT on Windows has several restrictions that are not present on unix
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filesystems, which are imposed by this transport.
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VFAT is strictly 8-bit using codepages to represent non-ascii characters.
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This implementation currently doesn't model the codepage but just insists
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on only ascii characters being written.
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Restrictions imposed by this transport:
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* filenames are squashed to lowercase
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* filenames containing non-ascii characters are not allowed
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* filenames containing the characters "@<>" are not allowed
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(there should be more?)
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Some other restrictions are not implemented yet, but possibly could be:
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* open files can't be deleted or renamed
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* directories containing open files can't be renamed
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* special device names (NUL, LPT, ...) are not allowed
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from bzrlib.errors import TransportNotPossible
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from bzrlib.transport.decorator import TransportDecorator, DecoratorServer
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# TODO: It might be nice if these hooks were available in a more general way
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# on all paths passed in to the Transport, so that we didn't have to hook
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# every single method.
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# TODO: Perhaps don't inherit from TransportDecorator so that methods
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# which are not implemented here fail by default?
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class FakeVFATTransportDecorator(TransportDecorator):
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"""A decorator that can convert any transport to be readonly.
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This is requested via the 'vfat+' prefix to get_transport().
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This is intended only for use in testing and doesn't implement every
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This transport is typically layered on a local or memory transport
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which actually stored the files.
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def _get_url_prefix(self):
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"""Readonly transport decorators are invoked via 'vfat+'"""
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def _squash_name(self, name):
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"""Return vfat-squashed filename.
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The name is returned as it will be stored on disk. This raises an
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error if there are invalid characters in the name.
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if re.search(r'[?*:;<>]', name):
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raise ValueError("illegal characters for VFAT filename: %r" % name)
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def get(self, relpath):
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return self._decorated.get(self._squash_name(relpath))
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def mkdir(self, relpath, mode=None):
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return self._decorated.mkdir(self._squash_name(relpath), 0755)
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def has(self, relpath):
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return self._decorated.has(self._squash_name(relpath))
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def readv(self, relpath, offsets):
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return self._decorated.readv(self._squash_name(relpath), offsets)
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def put_file(self, relpath, f, mode=None):
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return self._decorated.put_file(self._squash_name(relpath), f, mode)
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class FakeVFATServer(DecoratorServer):
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"""A server that suggests connections through FakeVFATTransportDecorator
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def get_decorator_class(self):
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return FakeVFATTransportDecorator
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def get_test_permutations():
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"""Return the permutations to be used in testing."""
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return [(FakeVFATTransportDecorator, FakeVFATServer),
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bzrlib/transport/fakevfat.py
