使用Yarn 2创建Expo React Native项目启动时依赖报错

运行yarn start时报错如下：

PS D:\Files\Projects\my-rn-journey\other-navigators> yarn start
D:\Files\Projects\my-rn-journey\other-navigators\.pnp.cjs:21723
      Error.captureStackTrace(firstError);
            ^

Error: @expo/cli tried to access glob, but it isn't declared in its dependencies; this makes the require call ambiguous and unsound.

Required package: glob
Required by: @expo/cli@npm:0.7.3 (via D:\Files\Projects\my-rn-journey\other-navigators\.yarn\cache\@expo-cli-npm-0.7.3-b8fe3aaa8f-f1b03efbec.zip\node_modules\@expo\cli\build\src\utils\)

Require stack:
- D:\Files\Projects\my-rn-journey\other-navigators\.yarn\cache\@expo-cli-npm-0.7.3-b8fe3aaa8f-f1b03efbec.zip\node_modules\@expo\cli\build\src\utils\glob.js
- D:\Files\Projects\my-rn-journey\other-navigators\.yarn\cache\@expo-cli-npm-0.7.3-b8fe3aaa8f-f1b03efbec.zip\node_modules\@expo\cli\build\src\start\doctor\typescript\TypeScriptProjectPrerequisite.js
- D:\Files\Projects\my-rn-journey\other-navigators\.yarn\cache\@expo-cli-npm-0.7.3-b8fe3aaa8f-f1b03efbec.zip\node_modules\@expo\cli\build\src\start\startAsync.js
- D:\Files\Projects\my-rn-journey\other-navigators\.yarn\cache\@expo-cli-npm-0.7.3-b8fe3aaa8f-f1b03efbec.zip\node_modules\@expo\cli\build\src\start\index.js
- D:\Files\Projects\my-rn-journey\other-navigators\.yarn\cache\@expo-cli-npm-0.7.3-b8fe3aaa8f-f1b03efbec.zip\node_modules\@expo\cli\build\bin\cli
    at require$$0.Module._resolveFilename (D:\Files\Projects\my-rn-journey\other-navigators\.pnp.cjs:21723:13)
    at Module._load (node:internal/modules/cjs/loader:922:27)
    at require$$0.Module._load (D:\Files\Projects\my-rn-journey\other-navigators\.pnp.cjs:21612:31)
    at Module.require (node:internal/modules/cjs/loader:1143:19)
    at require (node:internal/modules/cjs/helpers:110:18)
    at Object.<anonymous> (D:\Files\Projects\my-rn-journey\other-navigators\.yarn\cache\@expo-cli-npm-0.7.3-b8fe3aaa8f-f1b03efbec.zip\node_modules\@expo\cli\build\src\utils\glob.js:8:13)
    at Module._compile (node:internal/modules/cjs/loader:1256:14)
    at Module._extensions..js (node:internal/modules/cjs/loader:1310:10)
    at require$$0.Module._extensions..js (D:\Files\Projects\my-rn-journey\other-navigators\.pnp.cjs:21767:33)
    at Module.load (node:internal/modules/cjs/loader:1119:32)

Node.js v18.16.1

解决方案 #

方法一：直接安装glob依赖 #

在项目根目录执行命令：

yarn add glob

安装完成后重新运行yarn start即可。

方法二：通过Yarn配置补充依赖声明 #

如果不想将glob添加到项目直接依赖，可以修改项目根目录的.yarnrc.yml文件，添加以下配置：

packageExtensions:
  "@expo/cli@*":
    dependencies:
      glob: "*"

保存后执行yarn install，再启动项目。

原因说明 #

Yarn 2的Plug'n'Play(PnP)模式会严格校验包的依赖声明，@expo/cli@0.7.3内部使用了glob库，但未在自身的dependencies中声明该依赖，导致PnP无法解析这个隐式依赖，从而抛出错误。上述两种方法都能让Yarn正确识别并加载glob库，解决启动报错问题。

内容的提问来源于stack exchange，提问作者Aşkın Kadir Çekim