quarkus: Live reload doesn't work for kotlin, gradle kotlin dsl project

But the general problem is indeed that when we detect a change, we are not correctly passing the necessary configuration to the Kotlin compiler.

While I think this is a good workaround, I don’t think this is a satisfying overall fix because it requires a lot of manual configuration. I believe the problem is still Quarkus not passing the same arguments that the regular compiler gets to the dev compiler.

After a long fight with the kotlin compiler options, gradle and the quarkus-gradle-plugin i finally found a workaround, not pretty but it works:

dependencies {
   // ...

    // Important: Kotlin compiler plugin version must be the same as the Kotlin compiler version
    quarkusDev("org.jetbrains.kotlin:kotlin-allopen-compiler-plugin:1.9.10") 
}

// ...

tasks.quarkusDev {
    compilerOptions {
        compiler("kotlin").args(
            listOf(
                "-Xplugin=${configurations.quarkusDev.get().files.find { "kotlin-allopen-compiler-plugin" in it.name }}",
                "-P=plugin:org.jetbrains.kotlin.allopen:annotation=jakarta.ws.rs.Path",
                "-P=plugin:org.jetbrains.kotlin.allopen:annotation=jakarta.enterprise.context.ApplicationScoped",
                "-P=plugin:org.jetbrains.kotlin.allopen:annotation=jakarta.persistence.Entity",
                "-P=plugin:org.jetbrains.kotlin.allopen:annotation=io.quarkus.test.junit.QuarkusTest",
            )
        )
    }
}

Helpful links:

• https://kotlinlang.org/docs/all-open-plugin.html#command-line-compiler
• https://quarkus.io/guides/kotlin#live-reload

Hope this will be fixed soon, we are migrating all our quarkus projects to Gradle and this issue sounds that it will cause additional problems.

demo.zip

You can:

• unpack the app
• run curl localhost:8080/hello
• Change RestResponse.ok("a") to RestResponse.ok("b")
• run curl localhost:8080/hello again, which should crash the app.

Let me know if this helps.