Bug in Kotlin Extension when mixing Kotlin & Java?

[NfNitLoop]

I'm new to Quarkus, and just got my team to agree to let me move a small project into Quarkus instead of Spring (which we use for most of our other projects).

The project was a small JAX-RS service written in Java. I got it moved over into Quarkus in a few hours. I later added the Kotlin extension and refactored some code into Kotlin. Java⟷Kotlin interoperability was working great.

… Until today. I was adding some new functionality to the codebase, and at some point quarkus dev stopped being able to discover my endpoints. And some of the tests that it tried to run at startup complained about missing classes.

After lots of trial and error I finally tracked it down to an empty Kotlin file. The first file I'd added to src/test/kotlin/. (Previously it had a test class in there, but I commented it out thinking the class was the culprit.)

Something about adding a file to that directory changed something in the build process.

Previously, my RestEndpoint class would get built into two locations:

• build/classes/java/main/my/package/RestEndpoint.class
• build/quarkus-app-classes-test/my/package/RestEndpoint.class

But the addition of a file to my src/test/kotlin directory seems to cause the files that get built into java/main to NOT be included in quarkus-app-classes-test. And, I assume that's the classpath that Quarkus uses for quarkus dev.

Does this sound possible? I expect maybe someone didn't test something w/ both Java and Kotlin code in the same project. That should work, right? I hope so, because one of the nice things about Kotlin is being able to incrementally replace Java. 😊

I did verify that the sourceSets in Gradle are unchanged:

// These are unchanged:
val showSourceSets = task("showSourceSets") {
    doLast {
        for (ss in sourceSets) {
            println(ss.name)
            println("Source dirs: ${ss.allJava.srcDirs}")
            println("Output dirs: ${ss.output.classesDirs.files}")
            println()
        }
    }
}

tasks.compileJava { dependsOn(showSourceSets) }
tasks.compileKotlin { dependsOn(showSourceSets) }

… So I think it must be in some steps that the quarkus binary/extension performs after that.

I'll try creating a minimal reproduction to create a bug from. But wanted to make sure I'm not going off on the wrong path first.

[quarkus-bot[bot]]

/cc @evanchooly(kotlin), @geoand(kotlin)

[geoand]

It does sound like a bug

[NfNitLoop]

Thanks. I created an issue here:
#30061

[NfNitLoop]

Is this AI generated spam? This isn’t the problem at all, and the bug has already been fixed by the Quarkus team. 👎👎