Question

How can I convert this Perl code to Groovy?

How to bypass confirmation prompts of an external process?

I am trying to convert a Perl script to Groovy. The program is loading/delete maestro (job scheduling) jobs automatically. The problem is the delete command will prompt for confirmation (Y/N) on every single job that it finds. I tried the process execute in groovy but will stop at the prompts. The Perl script is writing bunch of Ys to the stream and print it to the handler( if I understood it correctly) to avoid stopping. I am wondering how to do the same thing in Groovy ?

Or any other approach to execute a command and somehow write Y on every confirmation prompt.

Perl Script:

 $maestrostring="";
 while ($x < 1500) {
    $maestrostring .= "y\n";
    $x++;
 }

  # delete the jobs
  open(MAESTRO_CMD, "|ssh mserver /bin/composer delete job=pserver#APPA@") 
  print MAESTRO_CMD $maestrostring;
  close(MAESTRO_CMD);

This is my working groovy code:

    def deleteMaestroJobs (){
            ...
    def commandSched ="ssh $maestro_server /bin/composer delete sched=$primary_server#$app_acronym$app_level@"
    def commandJobs  ="ssh $maestro_server /bin/composer delete job=$primary_server#$app_acronym$app_level@"

    try {
        executeCommand commandJobs
    }
    catch (Exception ex ){
        throw new Exception("Error executing the Maestro Composer [DELETE]")
    }

    try {
        executeCommand commandSched
    }
    catch (Exception ex ){
        throw new Exception("Error executing the Maestro Composer [DELETE]")
    }
}


    def executeCommand(command){
        def process = command.execute()
        process.withWriter { writer ->
          writer.print('y\n' * 1500)
        }
       process.consumeProcessOutput(System.out, System.err)
       process.waitFor()
}

Answer 1

A direct translation would be:

'ssh mserver /bin/composer delete job=pserver#APPA@'.execute().withWriter { writer ->
    writer.print('y\n' * 1500)
}