Module Federation: Building remote-only entries without index.js requirement

[vlad-musienko]

Hey everyone.
I'm migrating Module Federation apps from Webpack to Rsbuild. Many apps are remote-only (no standalone entry point, only expose federated modules).

Issue:
Webpack allowed building with just ModuleFederationPlugin config, no entry file needed
Rsbuild requires an entry file, so I created empty index.js files as a workaround. (Now I have to tell teams "don't delete this empty file" which feels odd and creates confusion)

Questions:

1. Is there a way to build MF remotes without requiring an entry file?
2. Am I using the right tool for this use case? Should remote-only apps use pure Rspack instead, while hosts use Rsbuild? (Both are from the same vendor, so I'm wondering which is more appropriate for remote-only builds)
3. Is support for entry-less remotes planned for Rsbuild?

Thanks in advance!

[chenjiahan]

Thanks for the feedback! This pattern should be allowed, we will support it.

[chenjiahan]

PR: #6602

[vlad-musienko]

Thanks for this change! Really appreciate it.