def auto_need(form):
    """Automatically ``need()`` the relevant Fanstatic resources for a form.

    This function automatically utilises libraries in the ``js.*`` namespace
    (such as ``js.jquery``, ``js.tinymce`` and so forth) to allow Fanstatic
    to better manage these resources (caching, minifications) and avoid
    duplication across the rest of your application.
    """

    requirements = form.get_widget_requirements()

    for library, version in requirements:
        resources = resource_mapping[library]
        if not isinstance(resources, list):  # pragma: no cover (bw compat only)
            resources = [resources]
        for resource in resources:
            resource.need()