build.gradle

buildscript {

    ext {

        kotlin_plugin_version = '1.3.41'

        kotlin_std_lib_version = '1.3.41'
        vertx_version = '3.7.1'

        libraries = [
                kotlin_jdk8 : "org.jetbrains.kotlin:kotlin-stdlib-jdk8:$kotlin_std_lib_version",
                kotlin_coroutines: "org.jetbrains.kotlinx:kotlinx-coroutines-core:1.3.0-M2",
                vertx : [
                        "io.vertx:vertx-core:$vertx_version",
                        "io.vertx:vertx-web:$vertx_version",
                        "io.vertx:vertx-lang-kotlin:$vertx_version",
                        "io.vertx:vertx-lang-kotlin-coroutines:$vertx_version",
                ]
        ]
    }

    repositories {
        mavenCentral()
        jcenter()
    }

    dependencies {
        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_plugin_version"
    }
}

subprojects {
    apply plugin: 'kotlin'

    repositories {
        mavenCentral()
        jcenter()
    }

    gradle.projectsEvaluated {

        compileKotlin {
            kotlinOptions {
                jvmTarget = '1.8'
                allWarningsAsErrors = true
            }
        }
    }
}