var fs = require('fs')
/**
 * 
 * @param {*} path 必传参数可以是文件夹可以是文件
 * @param {*} reservePath 保存path目录 path值与reservePath值一样就保存
 */
function delFile(path, reservePath) {
    if (fs.existsSync(path)) {
        if (fs.statSync(path).isDirectory()) {
            let files = fs.readdirSync(path);
            files.forEach((file, index) => {
                let currentPath = path + "/" + file;
                if (fs.statSync(currentPath).isDirectory()) {
                    delFile(currentPath, reservePath);
                } else {
                    fs.unlinkSync(currentPath);
                }
            });
            if (path != reservePath) {
                fs.rmdirSync(path);
            }
        } else {
            fs.unlinkSync(path);
        }
    }
}