Kotlin Annotation Processor not working? What am I missing? - kotlin

Question

Recently I've been trying to make a annotation processor through Kotlin but I can't seem to get it to work. Everything compiles and I don't get any errors but when I check the contents of my jar file I don't see the resource I'm trying to create.
I've tried everything for hours and I'm really stuck so just looking for help :/ I do have one random class annotated to see if it would work but no luck.
The annotation class
#Retention(AnnotationRetention.RUNTIME)
#Target(AnnotationTarget.CLASS)
annotation class TestAnnotation
The processor class
#AutoService(TestAnnotation::class)
class TestAnnotationProcessor : AbstractProcessor() {
override fun process(annotations: MutableSet<out TypeElement>, environment: RoundEnvironment): Boolean {
this.processingEnv.filer.createResource(StandardLocation.CLASS_OUTPUT, "", "test.txt")
return true
}
override fun getSupportedSourceVersion() = SourceVersion.RELEASE_8
override fun getSupportedAnnotationTypes() = setOf(TestAnnotation::class.java.canonicalName)
}
My build.gradle.kts
import org.jetbrains.kotlin.gradle.tasks.KotlinCompile
import com.github.jengelman.gradle.plugins.shadow.tasks.ShadowJar
plugins {
java
kotlin("jvm") version "1.3.50"
kotlin("kapt") version "1.3.50"
id("com.github.johnrengelman.shadow") version "5.1.0"
}
group = "com.example.test"
version = "1.0"
repositories {
mavenCentral()
}
dependencies {
implementation(kotlin("stdlib-jdk8"))
implementation("org.jetbrains.kotlinx:kotlinx-coroutines-core:1.3.1")
implementation("com.google.auto.service:auto-service:1.0-rc6")
kapt("com.google.auto.service:auto-service:1.0-rc6")
}
configure<JavaPluginConvention> {
sourceCompatibility = JavaVersion.VERSION_1_8
}
tasks.withType<KotlinCompile> {
kotlinOptions.jvmTarget = "1.8"
}
tasks.withType<ShadowJar> {
dependencies {
exclude(dependency("com.google.auto.service:auto-service:1.0-rc6"))
}
}

Answer 1

In order for your custom annotation processor to work, you will have to use it in your build script dependencies
dependencies {
kapt project(':processor-module') // or what ever your processor's module is named.
//OR
kapt 'gourp:artifact:version' // if your processor is published into a maven repository.
}