neu_script.scala

#!/bin/sh
unset LEVEL
_x4563="$@" # don't have a clue why "$@" does not work on next line
if expr "$_x4563" : '--trace *$\|--trace \|.* --trace$\|.* --trace '>/dev/null ; then LEVEL='DEBUG'; fi
prog=`basename $0`
exec scala \
   -save \
   -classpath "$HOME/lib/scopt_2.11-3.4.0.jar:$HOME/lib/slf4j-api-1.7.21.jar:$HOME/lib/logback-classic-1.1.7.jar:$HOME/lib/logback-core-1.1.7.jar" \
   -Dprogname=${prog} \
   -Dlogback.configurationFile=$HOME/lib/logback.xml \
   -Dlog.level=${LEVEL} \
   "$0" "$@"
!#

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import scopt._
import scala.io.Source
import java.io.File

val script="neu_script.scala"

// object HelloSbt extends App {
//     *** would need to call main() in a script
// }
val logger = LoggerFactory.getLogger(script)

case class Config(
   trace: Boolean = false
   // ,numero: Int = -1
   // ,cadena: String = "(default)"
   ,files: Seq[File] = Seq()
  )

val parser = new scopt.OptionParser[Config](script) {
   head(script, "0.1")
   help("help") text("prints this usage text")
   // opt[Int]('n', "numero") action { (x, c) =>
   //    c.copy(numero = x) } text("foo is an integer property")
   // opt[String]('c', "cadena") action { (x, c) =>
   //    c.copy(cadena = x) } text("cadena is an string property")
   // opt[Unit]("flag") action { (_, c) =>
   //    c.copy(flag = true) } text("this option is not hidden in the usage text")
   opt[Unit]("trace") hidden() action { (x, c) =>
      c.copy(trace = true) } text("this option is hidden in the usage text")    
   arg[File]("<file>...") unbounded() optional() action { (x, c) =>
      c.copy(files = c.files :+ x) } text("optional unbounded args")
   // note("...")
}

logger.info("Start")

// parser.parse returns Option[C]
val result = parser.parse(args, Config()) map { config =>
   logger.debug("trace:[" + config.trace + "] " 
      + "files:[" + config.files + "] ")
   // do stuff

   config.files.foreach( f => for (line <- Source.fromFile(f).getLines) {
     println(line)
   })
  
} getOrElse {
   // arguments are bad, usage message will have been displayed
}
logger.info("Finish")