1
# Copyright (C) 2006 Canonical Ltd
3
# This program is free software; you can redistribute it and/or modify
4
# it under the terms of the GNU General Public License as published by
5
# the Free Software Foundation; either version 2 of the License, or
6
# (at your option) any later version.
8
# This program is distributed in the hope that it will be useful,
9
# but WITHOUT ANY WARRANTY; without even the implied warranty of
10
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11
# GNU General Public License for more details.
13
# You should have received a copy of the GNU General Public License
14
# along with this program; if not, write to the Free Software
15
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
17
"""Fake transport with some restrictions of Windows VFAT filesystems.
19
VFAT on Windows has several restrictions that are not present on unix
20
filesystems, which are imposed by this transport.
22
VFAT is strictly 8-bit using codepages to represent non-ascii characters.
23
This implementation currently doesn't model the codepage but just insists
24
on only ascii characters being written.
26
Restrictions imposed by this transport:
28
* filenames are squashed to lowercase
29
* filenames containing non-ascii characters are not allowed
30
* filenames containing the characters "@<>" are not allowed
31
(there should be more?)
33
Some other restrictions are not implemented yet, but possibly could be:
35
* open files can't be deleted or renamed
36
* directories containing open files can't be renamed
37
* special device names (NUL, LPT, ...) are not allowed
43
from bzrlib.errors import TransportNotPossible
44
from bzrlib.transport.decorator import TransportDecorator, DecoratorServer
47
# TODO: It might be nice if these hooks were available in a more general way
48
# on all paths passed in to the Transport, so that we didn't have to hook
49
# every single method.
51
# TODO: Perhaps don't inherit from TransportDecorator so that methods
52
# which are not implemented here fail by default?
55
class FakeVFATTransportDecorator(TransportDecorator):
56
"""A decorator that can convert any transport to be readonly.
58
This is requested via the 'vfat+' prefix to get_transport().
60
This is intended only for use in testing and doesn't implement every
63
This transport is typically layered on a local or memory transport
64
which actually stored the files.
68
def _get_url_prefix(self):
69
"""Readonly transport decorators are invoked via 'vfat+'"""
72
def _squash_name(self, name):
73
"""Return vfat-squashed filename.
75
The name is returned as it will be stored on disk. This raises an
76
error if there are invalid characters in the name.
78
if re.search(r'[?*:;<>]', name):
79
raise ValueError("illegal characters for VFAT filename: %r" % name)
82
def get(self, relpath):
83
return self._decorated.get(self._squash_name(relpath))
85
def mkdir(self, relpath, mode=None):
86
return self._decorated.mkdir(self._squash_name(relpath), 0755)
88
def has(self, relpath):
89
return self._decorated.has(self._squash_name(relpath))
91
def readv(self, relpath, offsets):
92
return self._decorated.readv(self._squash_name(relpath), offsets)
94
def put(self, relpath, f, mode=None):
95
return self._decorated.put(self._squash_name(relpath), f, mode)
98
class FakeVFATServer(DecoratorServer):
99
"""A server that suggests connections through FakeVFATTransportDecorator
104
def get_decorator_class(self):
105
return FakeVFATTransportDecorator
108
def get_test_permutations():
109
"""Return the permutations to be used in testing."""
110
return [(FakeVFATTransportDecorator, FakeVFATServer),
added
removed
bzrlib/transport/fakevfat.py
