I have a multiproject gradle setup with Kotlin DSL. In my master build.gradle.kts I have:

val someVersion: String by extra("1.2.3")

However, in childproj/build.gradle.kts:

val someVersion: String by extra

does not work, saying “Cannot get non-null extra property ‘someVersion’” What’s the appropriate way to do variable inheritance?

extra is scoped. In the child project you can do either of these:

val someVersion: String by project

(

project

delegate inherits properties from parent project, including

extra

) or direct access if you want to prevent a clash with something like `gradle.properties`:

val someVersion: String by rootProject.extra

If you don't need the dynamic initialization

extra("1.2.3")

any properties you put in your gradle.properties will be available to all projects gradle.properties

someVersion=1.2.3