Unsupported configuration file extension for %s: %s

Raise code

    if cfile is not None:
        ext = os.path.splitext(cfile)[-1]
        if ext in ('.ini', '.cfg'):
            ftype = 'ini'
        elif ext in ('.yaml', '.yml'):
            ftype = 'yaml'
        else:
            raise AnsibleOptionsError("Unsupported configuration file extension for %s: %s" % (cfile, to_native(ext)))

    return ftype


# FIXME: can move to module_utils for use for ini plugins also?
def get_ini_config_value(p, entry):
    ''' returns the value of last ini entry found '''