Returns the slug arg defined for the ``home`` urlpattern, which
    is the definitive source of the ``url`` field defined for an
    editable homepage object.

def home_slug():
    """
    Returns the slug arg defined for the ``home`` urlpattern, which
    is the definitive source of the ``url`` field defined for an
    editable homepage object.
    """
    prefix = get_script_prefix()
    slug = reverse("home")
    if slug.startswith(prefix):
        slug = '/' + slug[len(prefix):]
    try:
        return resolve(slug).kwargs["slug"]
    except KeyError:
        return slug