tests/crashgetbundler.py

internal-doc: document the config register mechanism

This explains the various usage and feature of the config register introduced
in Mercurial 4.3 and 4.4.

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)