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# Copyright (C) 2005, 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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from StringIO import StringIO
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from bzrlib.lazy_import import lazy_import
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lazy_import(globals(), """
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from bzrlib.bundle import serializer as _serializer
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from bzrlib.transport import (
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do_catching_redirections,
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from bzrlib.trace import note
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def read_bundle_from_url(url):
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return read_mergeable_from_url(url, _do_directive=False)
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def read_mergeable_from_url(url, _do_directive=True):
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"""Read mergable object from a given URL.
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:return: An object supporting get_target_revision. Raises NotABundle if
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the target is not a mergeable type.
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from bzrlib.merge_directive import MergeDirective
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url = urlutils.normalize_url(url)
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url, filename = urlutils.split(url, exclude_trailing_slash=False)
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# A path to a directory was passed in
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# definitely not a bundle
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raise errors.NotABundle('A directory cannot be a bundle')
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# All of this must be in the try/except
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# Some transports cannot detect that we are trying to read a
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# directory until we actually issue read() on the handle.
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transport = get_transport(url)
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def get_bundle(transport):
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return transport.get(filename)
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def redirected_transport(transport, exception, redirection_notice):
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note(redirection_notice)
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url, filename = urlutils.split(exception.target,
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exclude_trailing_slash=False)
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raise errors.NotABundle('A directory cannot be a bundle')
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return get_transport(url)
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f = do_catching_redirections(get_bundle, transport,
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except errors.TooManyRedirections:
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raise errors.NotABundle(str(url))
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directive = MergeDirective.from_lines(f.readlines())
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return _serializer.read_bundle(f)
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except (errors.TransportError, errors.PathError), e:
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raise errors.NotABundle(str(e))
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# Abstraction leakage, SFTPTransport.get('directory')
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# doesn't always fail at get() time. Sometimes it fails
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# during read. And that raises a generic IOError with
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# just the string 'Failure'
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# StubSFTPServer does fail during get() (because of prefetch)
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# so it has an opportunity to translate the error.
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raise errors.NotABundle(str(e))
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except errors.NotAMergeDirective:
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return _serializer.read_bundle(f)