build monorepo fails

Deploying a monorepo project to AWS Amplify can be challenging, but there are several strategies you can use to address your issues:

1. Configuring AWS Amplify for monorepo deployment: AWS Amplify now supports monorepo deployments. When setting up your app in the Amplify Console, you can specify that your project is a monorepo. This allows you to select the root directory for your app within the repository.

2. Excluding directories from the build process: To exclude certain directories from the Amplify build process, you can use the .gitignore file or create an amplify.yml file in your project root to customize the build settings. In the amplify.yml, you can specify which directories to include or exclude during the build process.

3. Amplify folder location: The amplify folder should typically be located at the root of your project. For a monorepo setup with multiple apps sharing the same backend, you can create a separate Amplify app for the shared backend and then reference it in your frontend apps.

Here's a suggested approach for your monorepo setup:

1. Create a separate Amplify app for your shared backend. This will be the only app that updates changes to the backend.

2. For your main React app and the language server, create separate Amplify apps in the console. When connecting these apps, check the "My app is a monorepo" box and specify the correct path to each app.

3. In the build settings for your frontend apps, update the build commands to include a reference to your shared backend Amplify app. This ensures that the frontend builds point to the shared backend.

4. For your React app using Vite, make sure your build settings in Amplify are correctly configured for a Vite project.

5. For the language server in the languageClientServers directory, you may need to set up a separate deployment process, as it's a server-side application and might require a different hosting solution than what Amplify typically provides for frontend apps.

By following these steps, you should be able to deploy your monorepo structure to AWS Amplify while maintaining the shared backend configuration across multiple apps. Remember to adjust your build settings and scripts as needed to accommodate your specific project structure and requirements.

Sources
Monorepo setup - React - AWS Amplify Gen 2 Documentation
Monorepo setup - Android - AWS Amplify Gen 2 Documentation
AWS Amplify Console now supports deploying and hosting web apps managed in monorepos
AWS Amplify Hosting announces support for monorepo frameworks