This repository illustrates a bug in MPS where Kotlin stubs are not packaged correctly out of the box and are not visible when module containing them is deployed as part of a plugin (as opposed to being used directly in the IDE from sources).

Instructions:

Open the project in MPS:

1. Run ./gradlew setup to compile the Kotlin library and copy it over to the MPS project.
2. Open mps-project in MPS 2024.3.
3. Navigate to the kotlin.library solution.
   • Observe that it contains stubs.
4. Open properties of the solution.
   • Observe that the model root is present and correct (points to an existing directory).

Build and install the plugin:

1. Run ./gradlew plugin.
2. In MPS invoke 'Install plugin from disk...' action, choose mps-project/build/distributions/plugin.zip.
3. Restart MPS, open any project, e.g. _theSimplestLanguage sample.
4. Navigate to the kotlin.library solution.
   • Observe that it is empty, i.e. does not contain any stubs.
5. Open properties of the solution.
   • Observe that the Kotlin model root is broken (points to a non-existent directory).