vue.js - Yarn add raise error 缺少要添加到项目中的包列表

Question

重新安装我的 Kubuntu 18 后，我尝试运行我的 @vue/cli 4.0.5/vuex 3 应用程序
并得到错误:错误缺少要添加到项目的包列表

serge@AtHome:/mnt/_work_sdb8/wwwroot/lar/VApps/vtasks$ node -v
v14.12.0
serge@AtHome:/mnt/_work_sdb8/wwwroot/lar/VApps/vtasks$ yarn -v
1.22.5
serge@AtHome:/mnt/_work_sdb8/wwwroot/lar/VApps/vtasks$ yarn add
yarn add v1.22.5
error Missing list of packages to add to your project.
info Visit https://yarnpkg.com/en/docs/cli/add for documentation about this command.
serge@AtHome:/mnt/_work_sdb8/wwwroot/lar/VApps/vtasks$ yarn upgrade
yarn upgrade v1.22.5
error No lockfile in this directory. Run `yarn install` to generate one.
info Visit https://yarnpkg.com/en/docs/cli/upgrade for documentation about this command.
serge@AtHome:/mnt/_work_sdb8/wwwroot/lar/VApps/vtasks$ lsb_release -d; uname -r; uname -i
Description:    Ubuntu 18.04.5 LTS
4.15.0-118-generic
x86_64

我的 package.json :

{
  "name": "ctasks",
  "version": "0.1.0",
  "private": true,
  "scripts": {
    "serve": "vue-cli-service serve",
    "build": "vue-cli-service build",
    "test:e2e": "vue-cli-service test:e2e",
    "test:unit": "vue-cli-service test:unit",
    "lint": "vue-cli-service lint"
  },
  "dependencies": {
    "@voerro/vue-tagsinput": "^2.2.0",
    "@vue/cli-plugin-babel": "^4.4.1",
    "axios": "^0.19.0",
    "core-js": "^3.3.2",
    "cypress-file-upload": "^3.5.3",
    "file-saver": "^2.0.2",
    "font-awesome": "^4.7.0",
    "idle-vue": "^2.0.5",
    "moment": "^2.24.0",
    "moment-timezone": "^0.5.27",
    "v-money": "^0.8.1",
    "vee-validate": "^3.1.0",
    "vue": "^2.6.10",
    "vue-avatar": "^2.1.8",
    "vue-context-menu": "^2.0.6",
    "vue-focus": "^2.1.0",
    "vue-head": "^2.2.0",
    "vue-js-modal": "^1.3.31",
    "vue-nav-tabs": "^0.5.7",
    "vue-notification": "^1.3.20",
    "vue-phone-number-input": "^1.1.9",
    "vue-router": "^3.1.3",
    "vue-select": "^3.2.0",
    "vue-simple-calendar": "^4.3.2",
    "vue-simple-suggest": "^1.10.1",
    "vue-slider-component": "^3.1.1",
    "vue-the-mask": "^0.11.1",
    "vue-upload-component": "^2.8.20",
    "vue-wysiwyg": "^1.7.2",
    "vue2-datepicker": "^3.3.0",
    "vue2-filters": "^0.8.0",
    "vuex": "^3.0.1"
  },
  "devDependencies": {
    "@vue/cli-plugin-e2e-cypress": "~4.2.0",
    "@vue/cli-plugin-eslint": "~4.2.0",
    "@vue/cli-plugin-router": "^4.0.0",
    "@vue/cli-plugin-vuex": "^4.0.0",
    "@vue/cli-service": "^4.0.0",
    "babel-eslint": "^10.0.3",
    "bootstrap": "^4.3.1",
    "eslint": "^6.7.2",
    "eslint-plugin-vue": "^6.1.2",
    "faker": "^4.1.0",
    "jquery": "^3.4.1",
    "node-sass": "^4.12.0",
    "popper.js": "^1.16.0",
    "sass-loader": "^8.0.0",
    "vue-template-compiler": "^2.6.10"
  },
  "eslintConfig": {
    "root": true,
    "env": {
      "node": true
    },
    "extends": [
      "plugin:vue/essential",
      "eslint:recommended"
    ],
    "parserOptions": {
      "parser": "babel-eslint"
    },
    "rules": {
      "semi": [
        2,
        "never"
      ]
    }
  }
}

为什么会出错以及如何修复？
在重新安装我的 Kubuntu 之前，它工作正常。
我错过了一些配置吗？
我安装了lates node、npm、yarn。
谢谢!

Answer 1

阅读 yarn add ( https://classic.yarnpkg.com/en/docs/cli/add/ ) 的文档，您需要 指定要安装的包 。
如果你想添加一个包:

yarn add vue #same as npm install vue

如果要从 package.json 加载所有依赖项

yarn #same as npm install

如果你想从 package.json 运行自定义命令

yarn serve #same as npm run serve

您从 yarn 中看到的错误是因为您没有指定要安装的任何包，所以他告诉您:“给我您希望我在此项目中安装的包的名称(或多个名称)”