LineIncrease.kt

import java.io.*

fun main(args: Array<String>) {

    val inputFilePath = "/path/to/inputfile"
    val outputFilePath = "/path/to/outputfile"
    val times = 1

    val lines = ArrayList<String>()
    var header = ""

    try {
        val file = File(inputFilePath).absoluteFile
        file.forEachLine {
            if (it.isNotBlank()) {
                lines.add(it)
            }
        }
        header = lines.get(0)
        lines.removeAt(0)

    } catch (e: FileNotFoundException) {
        println(e)
    }

    File(outputFilePath).bufferedWriter().use { out ->
        out.appendln(header)
        for(i in 1..times) {
            for(s in lines) {
                out.appendln(s)
            }
        }
    }
}