DSL for declaring Gradle modules

settings.gradle.kts

// usage example

includeTree {
    module("app") {
        dir("domain") {
            module("domain-api")
            module("domain-impl")
        }
        dir("persistence) {
            module("persistence-api")
            module("persistence-impl")
        }
        module("web")
    }
}

// DSL itself

data class IncludeTree(
    private val path: String,
    private val parentProject: String
) {
    fun dir(path: String, block: IncludeTree.() -> Unit) {
        val nestedPath = "${this.path}/$path"
        includeTree(nestedPath, parentProject, block)
    }

    fun module(name: String, block: IncludeTree.() -> Unit = {}) {
        val projectName = "$parentProject:$name"
        val projectDir = "$path/$name"

        include(projectName)
        project(projectName).also {
            it.projectDir = file(projectDir)

            it.buildFile.takeUnless(File::exists)
                ?.also { buildFile ->
                    buildFile.parentFile.mkdirs()
                    file("${buildFile.absolutePath}.kts").createNewFile()
                }
        }
        includeTree(projectDir, projectName, block)
    }
}

fun includeTree(path: String = ".", parentProject: String = "", block: IncludeTree.() -> Unit) {
    IncludeTree(path, parentProject).block()
}