fancyopts: add early-options parser compatible with getopt() The next patch will add a flag for strict parsing of early options, where we'll have to parse all early options at once instead of processing them one-by-one by dispatch._earlygetopt(). That's why I decided to hook fancyopts(). All dispatch._early*opt() functions is planned to be replaced with this function. But in this stable series, only the strict mode will be handled by fancyopts.earlygetopt().

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)