A bash script that is also a nashorn script.

nashorn-bash

#!/usr/bin/env bash
JJS=$(type -p $JDK_HOME/bin/jjs || type -p jjs)
if [ -z $JJS ]; then
    echo "I can't find jjs. Please install JDK 8 or set JDK_HOME."; exit 1
fi
JS=$(mktemp $(basename "$0").XXXXXX)
tail -n+12 "$0" > $JS
$JJS -scripting $JS -- "$@"
rm $JS
exit 0;
# write your JS here:
print('This is Nashorn!\nHello sweet arguments:' + $ARG);

Starting point for command line tools based on Nashorn that find jjs and support regular arguments.
For example, copy above into a file runme, then chmod u+x runme, then ./runme 'hi there'
Compared to ./runme -- 'hi there'when using #!/usr/bin/env jjs