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Viewing changes to bzrlib/bundle/__init__.py

  • Committer: John Arbash Meinel
  • Date: 2008-10-08 21:56:12 UTC
  • mto: This revision was merged to the branch mainline in revision 3773.
  • Revision ID: john@arbash-meinel.com-20081008215612-y9v94tqxreqoangx
Simplify the --raw mode.

I didn't realize, but the only node that is special cased is the 'root' node,
and to read it, you actually have to parse it directly, because the
compressed bytes start immediately after the end of the header, rather than
having any padding before the zlib bytes.

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bzrlib/bundle/__init__.py
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# Copyright (C) 2005-2010 Canonical Ltd
 
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# Copyright (C) 2005, 2006 Canonical Ltd
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#
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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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#
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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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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from cStringIO import StringIO
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from bzrlib.symbol_versioning import deprecated_function, deprecated_in
 
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# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 
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from bzrlib.lazy_import import lazy_import
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lazy_import(globals(), """
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from bzrlib import (
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    urlutils,
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    )
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from bzrlib.bundle import serializer as _serializer
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from bzrlib.merge_directive import MergeDirective
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from bzrlib.transport import (
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    do_catching_redirections,
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    get_transport,
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from bzrlib.trace import note
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@deprecated_function(deprecated_in((1, 12, 0)))
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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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        possible_transports=possible_transports)
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    transport = child_transport.clone('..')
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    filename = transport.relpath(child_transport.base)
 
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    if filename.endswith('/'):
 
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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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    mergeable, transport = read_mergeable_from_transport(transport, filename,
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                                                         _do_directive)
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    return mergeable
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def read_mergeable_from_transport(transport, filename, _do_directive=True):
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    def get_bundle(transport):
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        return StringIO(transport.get_bytes(filename)), transport
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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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        if not filename:
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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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    # 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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    try:
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        bytef, transport = do_catching_redirections(get_bundle, transport,
 
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        def get_bundle(transport):
 
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            return transport.get(filename), transport
 
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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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            if not filename:
 
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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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        try:
 
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            f, transport = do_catching_redirections(get_bundle, transport,
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                                                    redirected_transport)
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    except errors.TooManyRedirections:
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        raise errors.NotABundle(transport.clone(filename).base)
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    except (errors.ConnectionReset, errors.ConnectionError), e:
 
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        except errors.TooManyRedirections:
 
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            raise errors.NotABundle(str(url))
 
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        if _do_directive:
 
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            from bzrlib.merge_directive import MergeDirective
 
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            directive = MergeDirective.from_lines(f.readlines())
 
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            return directive, transport
 
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        else:
 
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            return _serializer.read_bundle(f), transport
 
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    except errors.ConnectionReset:
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        raise
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    except (errors.TransportError, errors.PathError), e:
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        raise errors.NotABundle(str(e))
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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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        # 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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    if _do_directive:
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        try:
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            return MergeDirective.from_lines(bytef), transport
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        except errors.NotAMergeDirective:
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            bytef.seek(0)
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    return _serializer.read_bundle(bytef), transport
 
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    except errors.NotAMergeDirective:
 
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        f.seek(0)
 
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        return _serializer.read_bundle(f), transport