show_time.zsh

show_time() {
  local e=$1
  local o="$(printf "%02d" $(($e % 60)))s"
  e=$(($e / 60))
  if (( $e >= 0 )); then
    o="$(printf "%02d" $(($e % 60)))m${o}"
    e=$(($e / 60))
    if (( $e > 0 )); then
      o="$(($e % 24))h${o}"
      e=$(($e / 24))
      if (( $e > 0 )); then
        o="${e}d${o}"
      fi
    fi
  fi
  echo $o
}

show_time_start() {
  export CMD_START_TIME=${SECONDS}
}

show_time_end() {
  if [ -z ${CMD_START_TIME} ]; then
    return
  fi
  local elapsed=$((${SECONDS} - ${CMD_START_TIME}))
  export CMD_START_TIME=
  if (( $elapsed > 59 )); then
    show_time $elapsed
  fi
}

preexec_functions=($preexec_functions show_time_start)
precmd_functions=($precmd_functions show_time_end)