1
# Copyright (C) 2005, 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
from bzrlib.lazy_import import lazy_import
18
lazy_import(globals(), """
23
from bzrlib.bundle import serializer as _serializer
24
from bzrlib.transport import get_transport as _get_transport
28
def read_bundle_from_url(url):
29
"""Read a bundle from a given URL.
31
:return: A BundleReader, may raise NotABundle if the target
32
is not a proper bundle.
34
url, filename = urlutils.split(url, exclude_trailing_slash=False)
36
# A path to a directory was passed in
37
# definitely not a bundle
38
raise errors.NotABundle('A directory cannot be a bundle')
40
# All of this must be in the try/except
41
# Some transports cannot detect that we are trying to read a
42
# directory until we actually issue read() on the handle.
44
t = _get_transport(url)
46
return _serializer.read_bundle(f)
47
except (errors.TransportError, errors.PathError), e:
48
raise errors.NotABundle(str(e))
51
# Abstraction leakage, SFTPTransport.get('directory')
52
# doesn't always fail at get() time. Sometimes it fails
53
# during read. And that raises a generic IOError with
54
# just the string 'Failure'
55
# StubSFTPServer does fail during get() (because of prefetch)
56
# so it has an opportunity to translate the error.
57
raise errors.NotABundle(str(e))