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Viewing changes to breezy/bundle/__init__.py

  • Committer: Jelmer Vernooij
  • Date: 2019-06-01 00:52:00 UTC
  • mfrom: (7296.2.10 work)
  • Revision ID: jelmer@jelmer.uk-20190601005200-69woyx8n0klqu402
Merge trunk.

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breezy/bundle/__init__.py
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# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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from __future__ import absolute_import
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from ..lazy_import import lazy_import
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lazy_import(globals(), """
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from breezy import (
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    errors,
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    transport as _mod_transport,
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    urlutils,
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    )
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from breezy.bundle import serializer as _serializer
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from breezy.merge_directive import MergeDirective
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from breezy.i18n import gettext
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""")
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from ..sixish import (
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    BytesIO,
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    )
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from ..trace import note
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def read_mergeable_from_url(url, _do_directive=True, possible_transports=None):
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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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    """
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    child_transport = _mod_transport.get_transport(url,
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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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    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 BytesIO(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(gettext('A directory cannot be a bundle'))
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        return _mod_transport.get_transport_from_url(url)
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    try:
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        bytef, transport = _mod_transport.do_catching_redirections(
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            get_bundle, transport, 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) as e:
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        raise
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    except (errors.TransportError, errors.PathError) as e:
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        raise errors.NotABundle(str(e))
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    except (IOError,) as e:
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        # jam 20060707
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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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    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