build.gradle.kts

import org.jetbrains.kotlin.gradle.tasks.KotlinCompile

plugins {
    kotlin("jvm") version "1.8.21"
    id("java")
    application
}

group = "org.example"
version = "1.0.0"

repositories {
    mavenCentral()
}

tasks.withType<Jar> {
    // Otherwise you'll get a "No main manifest attribute" error
    manifest {
        attributes["Main-Class"] = "MainKt"
    }

    // To avoid the duplicate handling strategy error
    duplicatesStrategy = DuplicatesStrategy.EXCLUDE

    // To add all of the dependencies otherwise a "NoClassDefFoundError" error
    from(sourceSets.main.get().output)

    dependsOn(configurations.runtimeClasspath)

    from({
        configurations.runtimeClasspath.get().filter { it.name.endsWith("jar") }.map { zipTree(it) }
    })
}

dependencies {
    testImplementation(kotlin("test"))
    implementation(kotlin("stdlib-jdk8"))
    implementation("com.fasterxml.jackson.core:jackson-core:2.15.2")
    implementation("com.fasterxml.jackson.core:jackson-databind:2.15.2")
    implementation("com.fasterxml.jackson.dataformat:jackson-dataformat-xml:2.15.0")
    implementation("com.fasterxml.jackson.module:jackson-module-kotlin:2.12.1")
}

tasks.test {
    useJUnitPlatform()
}

tasks.withType<KotlinCompile> {
    kotlinOptions.jvmTarget = "1.8"
}

application {
    mainClass.set("MainKt")
}
val compileKotlin: KotlinCompile by tasks
compileKotlin.kotlinOptions {
    jvmTarget = "1.8"
}
val compileTestKotlin: KotlinCompile by tasks
compileTestKotlin.kotlinOptions {
    jvmTarget = "1.8"
}