Slurm scalastyle fix

src/main/scala/tapasco/slurm/Slurm.scala

@@ -15,6 +15,7 @@ import  java.nio.file.attribute.PosixFilePermission._
  **/
 final object Slurm extends Publisher {
   private implicit val logger = de.tu_darmstadt.cs.esa.tapasco.Logging.logger(getClass)
+  private val SLURM_RETRIES   = 10
 
   /** Model of a SLURM job. */
   final case class Job(
@@ -113,22 +114,23 @@ final object Slurm extends Publisher {
    * @param script Job script file to schedule via `sbatch`.
    * @return Either a positive integer (SLURM id), or an Exception.
    **/
-  def apply(script: Path, retries: Int = 10): Option[Int] = catchAllDefault[Option[Int]](None, "Slurm scheduling failed: ") {
-    val cmd = "sbatch %s".format(script.toAbsolutePath().normalize().toString)
-    logger.debug("running slurm batch job: '%s'".format(cmd))
-    val res = cmd.!!
-    val id = slurmSubmissionAck.findFirstMatchIn(res) map (_ group (1) toInt)
-    if (id.isEmpty) {
-      if (retries > 0) {
-        // wait for 10 secs + random up to 5 secs to avoid congestion
-        Thread.sleep(slurmRetryDelay + scala.util.Random.nextInt() % (slurmRetryDelay / 2))
-        apply(script, retries - 1)
-      } else { throw new SlurmException(script.toString, res) }
-    } else {
-      logger.debug("received SLURM id: {}", id)
-      id
+  def apply(script: Path, retries: Int = SLURM_RETRIES): Option[Int] =
+    catchAllDefault[Option[Int]](None, "Slurm scheduling failed: ") {
+      val cmd = "sbatch %s".format(script.toAbsolutePath().normalize().toString)
+      logger.debug("running slurm batch job: '%s'".format(cmd))
+      val res = cmd.!!
+      val id = slurmSubmissionAck.findFirstMatchIn(res) map (_ group (1) toInt)
+      if (id.isEmpty) {
+        if (retries > 0) {
+          // wait for 10 secs + random up to 5 secs to avoid congestion
+          Thread.sleep(slurmRetryDelay + scala.util.Random.nextInt() % (slurmRetryDelay / 2))
+          apply(script, retries - 1)
+        } else { throw new SlurmException(script.toString, res) }
+      } else {
+        logger.debug("received SLURM id: {}", id)
+        id
+      }
     }
-  }
 
   /** Check via `squeue` if the SLURM job is still running. */
   def isRunning(id: Int): Boolean = catchAllDefault[Boolean](true, "Slurm `squeue` failed: ") {