A trivial Gradle build file for a Kotlin application

README.md

Introduction

This project is the result of wanting to create a Kotlin application and using the Gradle build system, built from the ground up i.e not using an IDE's Gradle plugin.

References

This is a list of references used in compiling this recipe:

• Creating New Gradle Builds
• Kotlin Gradle documentation

Ingredience

I was working on macOS 10.13 (High Sierra) at the time, so details may vary on the platform you're working on or version of software currently available.

• Java JDK8
• VS Code ++ Gradle Language Support plugin ++ Kotlin plugin ++ Kotlin Language plugin
• Gradle

Recipe

• Work through the Creating New Gradle Builds guide using the Kotlin examples.
• Create the Kotlin source folder src/main/kotlin to your project and create the HelloWorld.kt Kotlin file in it.
• Edit the build.gradle.kt build file used in the Gradle guide to this one to include the Kotlin and application plugins and dependencies.
• (Optional) Create a local.properties file to include the configuration kotlin.incremental=true.

Usage

To build and run the simple application, run the following for the CLI (root of the project): $ ./gradlew clean build run

build.gradle.kts

/*
 * This file was generated by the Gradle 'init' task.
 *
 * This is a general purpose Gradle build.
 * Learn how to create Gradle builds at https://guides.gradle.org/creating-new-gradle-builds/
 */
import org.jetbrains.kotlin.gradle.dsl.Coroutines

kotlin.experimental.coroutines = Coroutines.ENABLE

description = "A trivial Gradle build"
version = "1.0.0"

repositories {
    mavenCentral()
}

plugins {
    id("base")
    `application`
    kotlin("jvm") version "1.2.61"
}

application {
    mainClassName = "HelloWorldKt"
}

dependencies {
    compile(kotlin("stdlib-jdk8"))
    testCompile(kotlin("test"))
    testCompile(kotlin("test-junit"))
}

tasks.create<Copy>("copy") {
     description = "Copies sourtces to the destination dir"
     group = "Custom"

     from("src")
     into("dest")
 }

 tasks.create<Zip>("zip") {
     description = "Archives sources in to a zip file"
     group = "Archive"

     from("src")
     setAppendix("demo")
     setBaseName("basic")
     setVersion("1.1")
     setExtension("zip")
    //  or used setArchiveName("basic-demo-1.0.zip")
 }

HelloWorld.kt

fun main(args: Array<String>) {
    MyFirstClass("Hello, My First Class").out()
}

class MyFirstClass(val message: String) {

    fun out() {
        println(message)
    }
}