Kotlin For Gradle Build

kotlin-gradle-build.ts

Define variable in root project and access it in subprojects by using extra

1) val foo: String by extra["hello"]
2) extra["foo"] = "hello"
3) 
buildScript {
  extra.apply {
    set("foo", "hello")
  }
}

// Access the extra variables in subprojects:
rootProject.extra["foo"] as String