Execute process from Kotlin

process.kt

import java.lang.ProcessBuilder.Redirect
import java.util.concurrent.TimeUnit

fun String.runCommand(workingDir: File? = null) {
    val process = ProcessBuilder(*split(" ").toTypedArray())
            .directory(workingDir)
            .redirectOutput(Redirect.INHERIT)
            .redirectError(Redirect.INHERIT)
            .start()
    if (!process.waitFor(10, TimeUnit.SECONDS)) {
        process.destroy()
        throw RuntimeException("execution timed out: $this")
    }
    if (process.exitValue() != 0) {
        throw RuntimeException("execution failed with code ${process.exitValue()}: $this")
    }
}