For when Guard doesn't behave after a Ctrl-C (won't exit or worse, leaves session-leader processes in the wild).

guard-kill

#!/usr/bin/env bash

guard_pids() {
  ps ax | egrep ' guard (master|worker)' | while read pid _; do
    echo $pid
  done
}

kill_guard() {
  pids=$(guard_pids)
  [[ "$pids" ]] || {
    echo ".. none to kill"
    return 0
  }
  echo ".. killing $(echo "$pids" | wc -l) processes"
  kill -9 $pids
}

check_all_killed() {
  remaining=$(guard_pids | wc -l)
  [ $remaining = 0 ] && {
    echo ".. all killed"
    return 0
  }
  echo "!! remaining: $remaining"
  return 1
}

kill_guard && check_all_killed && {
  echo ">> done"
}