[rtags] Allow to 'derive' rtags Since some releases, rtags (structure underlying uicfg) have selector and may be copied using something like: new_rtags = deepcopy(original_rtags) new_rtags.__module__ = __name__ new_rtags.__select__ = custom_selector The problem is that starting from that, both rtags wil diverge and changes in original_rtags won't be considered, while we usually want to set a few specific rules only in new_rtags. To fix this problem, this cset introduces the notion of "derivated/parent" rtag, eg: new_rtags = original_rtags.derive(__name__, custom_selector) Beside easier copying, when using the above method changes in original_rtags which are not overriden by new_rtags will be considered since it only hold its specific rules but look among its parent chain for non-found keys. Along the way, flake8 unittest_rtags. Closes #16164880

""" Defaults for a classical CubicWeb instance. """


def includeme(config):
    """ Enable the defaults that make the application behave like a classical
    CubicWeb instance.

    The following modules get included:

    -   :func:`cubicweb.pyramid.session <cubicweb.pyramid.session.includeme>`
    -   :func:`cubicweb.pyramid.auth <cubicweb.pyramid.auth.includeme>`
    -   :func:`cubicweb.pyramid.login <cubicweb.pyramid.login.includeme>`

    It is automatically included by the configuration system, unless the
    following entry is added to the :ref:`pyramid_settings`:

    .. code-block:: ini

        cubicweb.defaults = no

    """
    config.include('cubicweb.pyramid.session')
    config.include('cubicweb.pyramid.auth')
    config.include('cubicweb.pyramid.login')