forEachLine.nf

Channel.fromPath('batch1.txt').set { batches }

process iterateBatches {
  input:
  val x from batches
  output:
  file 'range_*' into masses

  exec:
  println x
}

process iterateMasses {
  input:
  val massRange from masses

  exec:
  println "Mass $massRange"
}