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# Copyright (C) 2006 by 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
from bzrlib.bundle.serializer import read_bundle
import bzrlib.errors as errors
import bzrlib.urlutils
import bzrlib.transport
def read_bundle_from_url(url):
"""Read a bundle from a given URL.
:return: A BundleReader, may raise NotABundle if the target
is not a proper bundle.
"""
url, filename = bzrlib.urlutils.split(url, exclude_trailing_slash=False)
if not filename:
# A path to a directory was passed in
# definitely not a bundle
raise errors.NotABundle('A directory cannot be a bundle')
# All of this must be in the try/except
# Some transports cannot detect that we are trying to read a
# directory until we actually issue read() on the handle.
try:
t = bzrlib.transport.get_transport(url)
f = t.get(filename)
return read_bundle(f)
except (errors.TransportError, errors.PathError), e:
raise errors.NotABundle(str(e))
except (IOError,), e:
# jam 20060707
# Abstraction leakage, SFTPTransport.get('directory')
# doesn't always fail at get() time. Sometimes it fails
# during read. And that raises a generic IOError with
# just the string 'Failure'
# StubSFTPServer does fail during get() (because of prefetch)
# so it has an opportunity to translate the error.
raise errors.NotABundle(str(e))
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