getDevMiddleware crashes when reactNativePath is undefined

[tomhendra]

Environment

OS: macOS 26.0
Node.js: v22.19.0
Package Manager: pnpm v10.17.0
Rock.js: 0.11.2

Description

The getDevMiddleware function in @callstack/repack crashes with TypeError [ERR_INVALID_ARG_TYPE]: The "paths[0]" argument must be of type string. Received undefined when reactNativePath parameter is undefined.

Patching the getDevMiddleware / pluginRepack to fallback to cwd seems to get the dev server running, although I am uncertain if this is a valid approach.

Edit: Happy to open a PR if a fallback to cwd is acceptable.

Reproducible Demo

pnpm create rock@latest
pnpm rock start

https://github.com/tomhendra/rock-issue

[thymikee]

We should pass reactNativePath if Re.Pack uses it, similar to how we do it in Metro plugin. Happy to accept a PR :)