public File huntForTheScriptFile(String input) 
{
        String scriptFileName = input.trim();
        File scriptFile = new File(scriptFileName);
        String[] standardExtensions = {".groovy",".gvy",".gy",".gsh"};
        int i = 0;
        while (i <  standardExtensions.length && !scriptFile.exists()) {
            scriptFile = new File(scriptFileName + standardExtensions[i]);
            i++;
        }
        // if we still haven't found the file, point back to the originally specified filename
        if (!scriptFile.exists()) {
            scriptFile = new File(scriptFileName);
        }
        return scriptFile;
}

Hunt for the script file, doesn't bother if it is named precisely. Tries in this order: - actual supplied name - name.groovy - name.gvy - name.gy - name.gsh

 public static  void main(String[] args) 
{
                  
        processArgs(args, System.out);
}

Main CLI interface.

 static  void processArgs(String[] args,
    PrintStream out) 
{
        Options options = buildOptions();
        try {
            CommandLine cmd = parseCommandLine(options, args);
            if (cmd.hasOption('h")) {
                printHelp(out, options);
            } else if (cmd.hasOption('v")) {
                String version = InvokerHelper.getVersion();
                out.println("Groovy Version: " + version + " JVM: " + System.getProperty("java.version"));
            } else {
                // If we fail, then exit with an error so scripting frameworks can catch it
                // TODO: pass printstream(s) down through process
                if (!process(cmd)) {
                    System.exit(1);
                }
            }
        } catch (ParseException pe) {
            out.println("error: " + pe.getMessage());
            printHelp(out, options);
        }
}