发布或者运行小程序时，怎样才可以避免某个文件或者某个文件夹及子级不会被覆盖和删除

1. manifest.json配置云函数目录：

 "mp-weixin" : {  
        "cloudfunctionRoot":"cloudfunctions"  
    },

1. 项目根目录安装copy-webpack-plugin依赖 5.0.0 版本

{  
  "devDependencies": {  
    "copy-webpack-plugin": "^5.0.0"  
  }  
}

1. 项目根目录创建vue.config.js

const path = require("path")  
const CopyWebpackPlugin = require("copy-webpack-plugin")  
module.exports = {  
    configureWebpack: {  
        plugins: [  
            new CopyWebpackPlugin([{  
                from: path.join(__dirname, 'cloudfunctions'),  
                to: path.join(__dirname, 'unpackage', 'dist', process.env.NODE_ENV === 'production' ?  
                    'build' : 'dev', process.env  
                    .UNI_PLATFORM, 'cloudfunctions'),  
            }, ]),  
        ]  
    },  
}