ksp-poc

A simple project demonstrating how to use the KSP and annotation processing in Kotlin.

What we are testing here?

Generating kotlin file based on method execution at compilation time.

Task: runScriptAndGenerateFiles

The AppController class declares the method definedTypes. This method returns a Map<String,Any>. At compilation time, the task runScriptAndGenerateFiles is responsible for executing the com.braveinnov.Reflector class that will:

Execute the method definedTypes from the AppController and generate a kotlin file based on that return.

Compiling generated file

Task: compileKotlinManually

This task will invoke the org.jetbrains.kotlin.cli.jvm.K2JVMCompiler and compile the generated classes.

Checking if the compilation worked

At the end the generated class should be inside the final jar.

jar -tf app/build/libs/app.jar

BOOT-INF/classes/com/braveinnov/controller/AppController.class
BOOT-INF/classes/com/braveinnov/configs/
BOOT-INF/classes/com/braveinnov/configs/WebConfig.class
BOOT-INF/classes/com/braveinnov/App.class
BOOT-INF/classes/com/example/
BOOT-INF/classes/com/example/HelloItShouldBeIncludedInTheFinalJar.class <<<
BOOT-INF/classes/application.yaml
BOOT-INF/lib/
BOOT-INF/lib/annotation.jar
BOOT-INF/lib/kotlinpoet-1.12.0.jar
BOOT-INF/lib/kotlin-stdlib-jdk8-1.7.0.jar

The KSP Process

The Custom Code Generation