def METHOD_NAME(rawtext, app, type, slug, options):
    """Create a link to a github resource.
    :param rawtext: Text being replaced with link node.
    :param app: Sphinx application context
    :param type: Link type (issues, changeset, etc.)
    :param slug: ID of the thing to link to
    :param options: Options dictionary passed to role func.
    """
    try:
        base = app.config.github_project_url
        if not base:
            raise AttributeError
        if not base.endswith('/'):
            base += '/'
    except AttributeError as err:
        raise ValueError('github_project_url configuration value is not set (%s)' % str(err))
    ref = base + type + '/' + slug + '/'
    set_classes(options)
    prefix = "#"
    if type == 'pull':
        prefix = "PR " + prefix
    node = nodes.reference(rawtext, prefix + utils.unescape(slug), refuri=ref,
                           **options)
    return node