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it's possible to add named extensions to types by extending ExtensionAware

interface FooExtension: ExtensionAware {
  val property1: String
  
  interface Bar: ExtensionAware {
    val property2: String

    interface Buz: ExtensionAware {
      val property3: Boolean
      val property4: String
    }
  }
}

val fooExtension = extensions.create<FooExtension>("foo")
val barExtension = fooExtension.extensions.create<FooExtension.Bar>("bar")
val buzExtension = barExtension.extensions.create<FooExtension.Bar.Buz>("buz")

Then Gradle will generate Kotlin DSL accessors (it's not strictly necessary to extend ExtensionAware, Gradle will add it automatically, but it helps makes things clear)

How about "just" a

val bar: Bar

? (and accompanying

fun bar(action: Action<Bar>)

)

Actually I lied — I use

Property<String>

everywhere.

Property<String> is better because Gradle can't instantiate a class with normal String properties :)

Works like a charm, thanks!