Simple scala script for wrapping `transmission-remote`

start-paused-torrent.scala

#!/bin/bash
exec scala -savecompiled "$0" "$@"
!#

// Given all torrents are paused, this script starts the first one

import sys.process._

val host = "127.0.0.1:9091"
val auth = "myuser:mypassword"

def run(cmd: String): String = {
  val sb = new StringBuilder
  Process(cmd) ! ProcessLogger({out: String => sb.append(out + "\n")})
  sb.toString
}

def runTorrentCmd(cmd: String): String =
  run(s"transmission-remote $host --auth $auth $cmd")

val lines = runTorrentCmd("--list").split("\n").toList
if (lines.size > 2) {
  val torrents = lines.drop(1).dropRight(1)
  val stopped = torrents.filter(_.contains("  Stopped  "))
  println(s"${torrents.size} torrents, ${stopped.size} of them stopped")
  if (stopped.size == torrents.size) {
    stopped.head.split("([ ]{2,})").map(_.trim).filter(_.nonEmpty) match {
      case Array(id, percentDone, downloaded, eta, up, down, ratio, status, name) =>
        println(s"Starting torrent $id: $name")
        println(runTorrentCmd(s"--torrent $id --start"))
    }
  }
}

usage-example.txt

time ./data/scripts/start-paused-torrent.scala 
6 torrents, 6 of them stopped
Starting torrent 51: jdk-7u51-linux-x64.tar.gz
127.0.0.1:9091/transmission/rpc/ responded: "success"


real  0m0.278s
user  0m0.236s
sys 0m0.048s