-x flag not supported

     -x[directory]  Tells Ruby that the script is embedded in a message.
                    Leading garbage will be discarded until the first that
                    starts with ``#!'' and contains the string, ``ruby''.  Any
                    meaningful switches on that line will applied.  The end of
                    script must be specified with either EOF, ^D (control-D),
                    ^Z (control-Z), or reserved word __END__.  If the direc-
                    tory name is specified, Ruby will switch to that directory
                    before executing script.