I want to modify an existing IntelliJ IDEA plugin as a step toward building my own. I chose Front End Alignment, opened it in IntelliJ IDEA, added the IntelliJ Community Edition SDK, and built the project successfully. But when I try to add a Plugin Run/Debug Configuration (to verify that I can debug a plugin) the "Use classpath of module" dropdown contains only "[None]", and I get:
Run Configuration Error: No plugin module specified for configuration
Project Structure > Project Settings > Modules shows that front-end-alignment
is a known module.
How can I run this sample plugin in the debugger?