I have a functions that’s an alternative to mavenCentral, which creates an ArtifactRepository:

fun RepositoryHandler.myCustomRepository(): ArtifactRepository {
    // about 20 lines of code
}

I have a multi-project Gradle build that also has a buildSrc, and I want to
use myCustomRepository:

• for both dependency loading and plugin loading
• in my root project, all subprojects, and in buildSrc

The best I’ve found is to use settings.gradle.kts and
buildSrc/settings.gradle.kts and use the function in four places:

• settings.gradle.kts in pluginManagement
• settings.gradle.kts in dependencyResolutionManagement
• buildSrc/settings.gradle.kts in pluginManagement
• buildSrc/settings.gradle.kts in dependencyResolutionManagement

Unfortunately,
it seems that I also need to define four identical copies of the function,
two in each settings.gradle.kts file. I haven’t been able to find a single place
to define it that’s visible to all four locations where I need to use it.

That is:

settings.gradle.kts

fun RepositoryHandler.myCustomRepository(): ArtifactRepository {
    // copy #1
}

pluginManagement {
    fun RepositoryHandler.myCustomRepository(): ArtifactRepository {
        // copy #2
    }

    repositories {
        myCustomRepository()
        gradlePluginPortal()
    }
}

dependencyResolutionManagement {
    repositories {
        myCustomRepository()
    }
}

buildSrc/settings.gradle.kts

fun RepositoryHandler.myCustomRepository(): ArtifactRepository {
    // copy #3
}

pluginManagement {
    fun RepositoryHandler.myCustomRepository(): ArtifactRepository {
        // copy #4
    }

    repositories {
        myCustomRepository()
        gradlePluginPortal()
    }
}

dependencyResolutionManagement {
    repositories {
        myCustomRepository()
        gradlePluginPortal()
    }
}

Is there some way to define this function in only ONE place, and use it in
all four of these places?