build.gradle

// Top-level build file where you can add configuration options common to all sub-projects/modules.

buildscript {
    apply from: 'config.gradle'

    repositories {
        google()
        jcenter()
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:3.0.1'
        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$rootProject.ext.dependencies.kotlinVersion"

        classpath "com.jfrog.bintray.gradle:gradle-bintray-plugin:1.8.0"
        classpath 'com.github.dcendents:android-maven-gradle-plugin:2.0'

        // NOTE: Do not place your application dependencies here; they belong
        // in the individual module build.gradle files
    }
}

allprojects {
    repositories {
        google()
        jcenter()
    }
}

task clean(type: Delete) {
    delete rootProject.buildDir
}
subprojects { subProject ->
    afterEvaluate {
        if (subProject.plugins.hasPlugin("kotlin") && subProject.plugins.hasPlugin("java-library")) {
            subProject.kotlin.copyClassesToJavaOutput = true
            subProject.jar.duplicatesStrategy = DuplicatesStrategy.EXCLUDE
        }
    }
}