bash task list and interrupt

bash调用串行任务队列方法和干预

1. 将任务填写在task_list以数组的形式组织
2. for循环一步步的执行串行任务
3. 某个任务需要依靠外部条件触发执行，monitor监测需要的文件

task_list=(task1 task2 task3)

function monitor() {
    
    until test -e goal_file; do
    
        echo "waitting for another task excute"
        sleep 5s
    
    done
    
}

for task in "${task_list[@]}"; do

    case ${task} in
    
        task1)  echo "excute task1 command";;
        task2)  monitor
                echo "excute task2 command";;
        task3)  echo "excute task3 command";;
            *） echo "ILLEAGAL TASK"
                exit;;

done