Capture task classpath fingerprints with Gradle Kotlin DSL

captureFingerprints.gradle.kts

// Add into root project, make sure you have Gradle Enterprise plugin
val buildScanApi = project.extensions.findByName("buildScan") as BuildScanExtension
subprojects {
// If you want to limit it to certain module(s), wrap it with: if (name == "module-name") { }
    val fingerprinter = serviceOf<org.gradle.internal.fingerprint.classpath.ClasspathFingerprinter>()
    tasks.withType(org.jetbrains.kotlin.gradle.dsl.KotlinCompile::class.java).configureEach task@{
        doFirst {
            var classLoader: ClassLoader = [email protected]
            while (classLoader is java.net.URLClassLoader) {
                val fingerprints = mutableSetOf<Array<String>>()
                val allFiles = mutableSetOf<File>()
                classLoader.urLs.forEach {
                    fingerprints.add(
                        arrayOf(
                            "${[email protected]}:${file(it.file).name}",
                            "${fingerprinter.fingerprint(files(it.file)).hash}"
                        )
                    )
                    allFiles.add(file(it.file))
                }
                fingerprints.forEach { fingerprint ->
                    buildScanApi.value(fingerprint[0], fingerprint[1])
                }
                buildScanApi.value(
                    "${[email protected]}:classpath",
                    allFiles.joinToString("\n")
                )
                classLoader = classLoader.parent
            }
        }
    }
}