GenIdea triggers KotlinModule.compile

[lefou]

After switching an existing project from mill-kotlin plugin to built-in Kotlin support, I noticed that mill.idea.GenIdea/idea triggered compilation of some kotlin modules.

Please note, that this could be related to some special setup in that project, but before the switch, it did not trigger compilation.

> mill --version
Mill Build Tool version 0.12.2
Java version: 21.0.4, vendor: Eclipse Adoptium, runtime: /opt/openjdk-bin-21.0.4_p7
Default locale: de_DE, platform encoding: UTF-8
OS name: "Linux", version: 6.1.90-gentoo-x86_64, arch: amd6

> mill mill.idea.GenIdea/ && mill clean __.compile && time mill mill.idea.GenIdea/
...
real    2m14,607s
user    0m5,509s
sys     0m4,850s

For comparison, this is with mill-kotlins KotlinModule.

-import mill.kotlinlib.KotlinModule
+import de.tobiasroeser.mill.kotlin.KotlinModule

> mill mill.idea.GenIdea/ && mill clean __.compile && time mill mill.idea.GenIdea/
...
real    0m7,688s
user    0m1,807s
sys     0m0,553s