执行ionic cordova build android报错：Project target does not exist

问题描述 #

执行命令ionic cordova build android时触发以下错误：

An unhandled exception occurred: Project target does not exist.
[ERROR] An error occurred while running subprocess ng.

完整错误日志：

[error] Error: Project target does not exist.
    at findProjectTarget (C:\Users\jsaez\Documents\Odec\CTAV\ctav-mobile\node_modules\@angular-devkit\architect\node\node-modules-architect-host.js:49:15)
    at Object.getBuilderName (C:\Users\jsaez\Documents\Odec\CTAV\ctav-mobile\node_modules\@angular-devkit\architect\node\node-modules-architect-host.js:62:46)
    at WorkspaceNodeModulesArchitectHost.getBuilderNameForTarget (C:\Users\jsaez\Documents\Odec\CTAV\ctav-mobile\node_modules\@angular-devkit\architect\node\node-modules-architect-host.js:101:35)
    at RunCommand.runSingleTarget (C:\Users\jsaez\Documents\Odec\CTAV\ctav-mobile\node_modules\@angular\cli\models\architect-command.js:242:55)
    at RunCommand.runArchitectTarget (C:\Users\jsaez\Documents\Odec\CTAV\ctav-mobile\node_modules\@angular\cli\models\architect-command.js:295:35)
    at RunCommand.run (C:\Users\jsaez\Documents\Odec\CTAV\ctav-mobile\node_modules\@angular\cli\commands\run-impl.js:15:25)
    at RunCommand.validateAndRun (C:\Users\jsaez\Documents\Odec\CTAV\ctav-mobile\node_modules\@angular\cli\models\command.js:136:33)
    at async runCommand (C:\Users\jsaez\Documents\Odec\CTAV\ctav-mobile\node_modules\@angular\cli\models\command-runner.js:224:24)
    at async default_1 (C:\Users\jsaez\Documents\Odec\CTAV\ctav-mobile\node_modules\@angular\cli\lib\cli\index.js:70:31)

项目的package.json配置：

{
  "dependencies": {
    "@ionic/angular": "^6.0.0",
    "@ionic/cordova-builders": "^7.0.0",
    "@ionic/storage": "^3.0.6",
    "@ionic/storage-angular": "^3.0.6",
    "ionic-cache": "^6.0.3"
  },
  "cordova": {
    "plugins": {
      "cordova-plugin-statusbar": {},
      "cordova-plugin-device": {},
      "cordova-plugin-splashscreen": {},
      "cordova-plugin-ionic-webview": {},
      "cordova-plugin-ionic-keyboard": {}
    },
    "platforms": [
      "android"
    ]
  }
}

解决方案 #

1. 检查并修复angular.json中的Target配置 #

错误核心是Angular CLI找不到对应的构建target，需检查项目根目录下的angular.json文件：

• 定位到projects -> [你的项目名称] -> architect节点
• 确认是否存在cordova-build和cordova-serve配置项，示例配置如下（将app替换为你的项目实际名称）：

"cordova-build": {
  "builder": "@ionic/cordova-builders:cordova-build",
  "options": {
    "browserTarget": "app:build"
  },
  "configurations": {
    "production": {
      "browserTarget": "app:build:production"
    }
  }
},
"cordova-serve": {
  "builder": "@ionic/cordova-builders:cordova-serve",
  "options": {
    "cordovaBuildTarget": "app:cordova-build",
    "devServerTarget": "app:serve"
  },
  "configurations": {
    "production": {
      "cordovaBuildTarget": "app:cordova-build:production",
      "devServerTarget": "app:serve:production"
    }
  }
}

若缺失上述配置，手动添加即可。

2. 对齐依赖版本 #

当前@ionic/angular为6.x版本，但@ionic/cordova-builders是7.x版本，两者版本不兼容（7.x builders对应Ionic 7+）。执行以下命令降级builders：

npm install @ionic/cordova-builders@6.2.0 --save-dev

3. 清理依赖并重新安装 #

执行以下命令清理缓存并重装依赖：

• Linux/macOS：

rm -rf node_modules package-lock.json
npm install

• Windows：

rmdir /s node_modules
del package-lock.json
npm install

4. 重新添加Android平台 #

先移除现有Android平台，再重新添加：

ionic cordova platform remove android
ionic cordova platform add android

完成以上步骤后，再次执行ionic cordova build android即可解决错误。

内容的提问来源于stack exchange，提问作者JuamBer