tests/crashgetbundler.py

unionrepo: dynamically create repository type from base repository

This is basically the same thing we just did for bundlerepo except
for union repositories.

.. api::

   ``unionrepo.unionrepository()`` is no longer usable on its own.

   To instantiate an instance, call ``unionrepo.instance()`` or
   ``unionrepo.makeunionrepository()``.

Differential Revision: https://phab.mercurial-scm.org/D4556

from __future__ import absolute_import

from mercurial.i18n import _
from mercurial import (
        changegroup,
        error,
        extensions
    )

def abort(orig, *args, **kwargs):
    raise error.Abort(_('this is an exercise'))

def uisetup(ui):
    extensions.wrapfunction(changegroup, 'getbundler', abort)