React Native 从0.66.0升级到0.68.2后Monorepo环境下bundleRelease任务失败：无法找到index.js资源

Let’s break down your two core issues and walk through actionable fixes tailored to your Yarn Workspaces monorepo setup:

1. Metro Can’t Find index.js (Root vs. Package Subfolder) #

The first error happens because Metro is looking for your entry file at the monorepo root instead of your app’s actual location (packages/myapp/index.js). React Native 0.68 introduced subtle changes to Metro’s configuration handling, which often trips up monorepo setups.

Fix Steps: #

• Update your metro.config.js (place this in your monorepo root, or adjust paths if it’s in your app package):

  const { getDefaultConfig, mergeConfig } = require('@react-native/metro-config');
  const path = require('path');
  
  const config = {};
  
  // Point Metro directly to your app's package directory
  config.projectRoot = path.resolve(__dirname, './packages/myapp');
  // Include the monorepo root in watch folders to detect shared packages
  config.watchFolders = [path.resolve(__dirname, '.')];
  
  // Ensure resolver looks for node_modules in both app and monorepo roots
  config.resolver = {
    nodeModulesPaths: [
      path.resolve(__dirname, './packages/myapp/node_modules'),
      path.resolve(__dirname, './node_modules'),
    ],
  };
  
  module.exports = mergeConfig(getDefaultConfig(__dirname), config);
  

• Verify Android build.gradle entry path:
  Open android/app/build.gradle and confirm the React extension points to your correct entry file:

  project.ext.react = [
    entryFile: "./packages/myapp/index.js",
    // Keep your other existing React configs here
  ]
  

• Wipe stale caches:
  Old cache references can stick around after upgrades. Run these commands to reset everything:

  cd android && ./gradlew clean
  rm -rf node_modules/.cache/metro
  yarn cache clean
  

2. Sentry Upload Failure (Missing Organization Slug) #

The second error is a standalone Sentry configuration issue—your CLI call is missing the required organization slug parameter.

Fix Steps: #

• Add Sentry org details to sentry.properties:
  Create or update this file in your app’s package directory (or monorepo root) with your Sentry org info:

  defaults.url=https://sentry.io/
  defaults.org=your-organization-slug
  defaults.project=your-project-slug
  auth.token=your-sentry-auth-token
  

• Or hardcode the org in Gradle:
  If you prefer Gradle-level configuration, add this to android/app/build.gradle:

  sentry {
    org = "your-organization-slug"
    project = "your-project-slug"
    // Keep other Sentry configs here
  }
  

• Validate the upload command:
  If you’ve customized the Sentry upload task anywhere, double-check that it includes the --org your-organization-slug flag.

Additional Troubleshooting Tips #

• Test the bundle command manually first to isolate Metro issues:

  npx react-native bundle --platform android --dev false --entry-file ./packages/myapp/index.js --bundle-output android/app/build/generated/assets/react/release/index.android.bundle --assets-dest android/app/build/generated/res/react/release --sourcemap-output android/app/build/generated/sourcemaps/react/release/index.android.bundle.map
  

  If this runs successfully, the problem is likely in your Gradle task setup, not Metro itself.
• Review the React Native 0.68 release notes for monorepo-specific breaking changes—focus on Metro and Android build system updates.

内容的提问来源于stack exchange，提问作者Varun Gupta