Groovy and JSAP

main.groovy

JSAP jsap = new JSAP(main.getResource("main.jsap"));
JSAPResult config = jsap.parse(args)
if (config.getBoolean("help") || !config.success())
{
    println "Usage: java -jar main.jar " + jsap.usage
    println ""
    println jsap.help
    if (!config.success())
    {
        for (e in config.getErrorMessageIterator())
        {
            println e
        }
    }
    System.exit(0)
}