FatJar with Gradle Kotlin DSL

gradle.build.kts

plugins {
    // Apply the Kotlin JVM plugin to add support for Kotlin on the JVM
    kotlin("jvm").version("1.3.10")

    application
}

repositories {
    // Use jcenter for resolving your dependencies.
    // You can declare any Maven/Ivy/file repository here.
    jcenter()
}

dependencies {
    // Use the Kotlin JDK 8 standard library
    compile(kotlin("stdlib-jdk8"))

    // Use the Kotlin test library
    testImplementation("org.jetbrains.kotlin:kotlin-test")

    // Use the Kotlin JUnit integration
    testImplementation("org.jetbrains.kotlin:kotlin-test-junit")
	
	compile("org.apache.commons:commons-lang3:3.8.1")
}

application {
    // Define the main class for the application
    mainClassName = "myproject.AppKt"
}


task<Jar>("fatJar") {
	dependsOn("build")

	manifest { attributes(mapOf("Main-Class" to application.mainClassName)) }

	from("build/classes/kotlin/main")

	configurations.runtime
		.filter { it.name.endsWith(".jar") }
		.forEach { from(zipTree(it)) }
}