notify after heavy command execution.

notify.zsh

notify_start_time=0
notify_end_time=0
notify_threshold=10
notify_prev_command=""
notify_flag=0

function notify_preexec {
    notify_flag=1
    notify_start_time=`date +'%s'`
    notify_prev_command="$2"
}

function notify_precmd {
    if test $notify_flag -eq 0; then
        return
    fi

    notify_flag=0

    notify_end_time=`date +'%s'`
    notify_elapsed=`expr $notify_end_time - $notify_start_time`

    if test $notify_start_time -eq 0; then
        return
    fi

    if test $notify_elapsed -ge $notify_threshold; then
        notify_notify
    fi
}

function notify_notify {
    echo "-- notified --"
}

add-zsh-hook preexec notify_preexec
add-zsh-hook precmd  notify_precmd