let processDir = function(dir){
	.....
    let files = fs.readdirSync(dir);
    console.log(files);
    for (i = 0;i < files.length;i++){
        tmp_path = path.resolve(dir, files[i]);
        if (fs.statSync(tmp_path).isDirectory()){
            const r = processDir(tmp_path);
            ....
        }else{
			.....
        }
    }
    return res;
}