has someone a good tip for a kapt tutorial for serverside annotation processing? (Android is not inv...

# announcements

[Stephan Schroeder]

has someone a good tip for a kapt tutorial for serverside annotation processing? (Android is not involved in any way. The task is to generate a documentation file containing which classes contain certain annotations. Since it's Kotlin files we're talking about, I guess that kapt is the right tool for the job!?)

[Big Chungus]

There's also #C013BA8EQSE
I'd expect there being markdown docs in the repos

[Big Chungus]

Otherwise just look at existing examples on github

[Big Chungus]

https://www.github.com/google/ksp/tree/master/docs%2Fquickstart.md

[Stephan Schroeder]

ok, I looked into KSP a bit, but since it's an alpha release it's too early for me to use it (,since I'm not working on a private project, but for my employer).

[ephemient]

every annotation processor example out there should have something like

class MyProcessor : AbstractProcessor() {
    override fun process(annotations: Set<out TypeElement>, roundEnv: RoundEnvironment): Boolean {
        val elements = roundEnv.getElementsAnnotatedWith(MyAnnotation::class.java)
        // do something with each element
        return true
    }
}

[ephemient]

you can use the filer to write to a resource

[Wayne Yang]

https://medium.com/tompee/58bd7d0d333b

[Stephan Schroeder]

@Wayne Yang but that's an Android project, so I'm not sure if there are android specific parts. What is this auto-service component that kapt is called to consume(?) kapt "com.google.auto.service:auto-service:1.0-rc4" ? I'm aiming for pure serverside.

[Stephan Schroeder]

@ephemient The class is pretty straight forward, but I'm more confused by the configuration.

[ephemient]

autoservice writes a resource for you. in fact, you should look at its source code as your goal seems similar

[ephemient]

annotation processing configuration is easy, just a resource file or a few (which autoservice can help with as well)

[ephemient]

the only thing that isn't documented on Java's side is the Gradle integration, which of course makes sense as it's Gradle-specific, but... read it to keep your builds fast and correct https://docs.gradle.org/current/userguide/java_plugin.html#sec:incremental_annotation_processing