How to create the fat jar with gradle kotlin script

Question

As titled, I\'d like to know how to modify the gradle.build.kts in order to have a task to create a unique jar with all the dependencies (kotlin li

Answer 1

Here is how to do it as of Gradle 6.5.1, Kotlin/Kotlin-Multiplatform 1.3.72, utilizing a build.gradle.kts file and without using an extra plugin which does seem unnecessary and problematic with multiplatform;

Note: in reality, few plugins work well with the multiplatform plugin from what I can tell, which is why I suspect its design philosophy is so verbose itself. It's actually fairly elegant IMHO, but not flexible or documented enough so it takes a ton of trial and error to setup even WITHOUT additional plugins.

Hope this helps others.

kotlin {
    jvm {
        compilations {
            val main = getByName("main")
            tasks {
                register("fatJar") {
                    group = "application"
                    manifest {
                        attributes["Implementation-Title"] = "Gradle Jar File Example"
                        attributes["Implementation-Version"] = archiveVersion
                        attributes["Main-Class"] = "[[mainClassPath]]"
                    }
                    archiveBaseName.set("${project.name}-fat")
                    from(main.output.classesDirs, main.compileDependencyFiles)
                    with(jar.get() as CopySpec)
                }
            }
        }
    }
}