})
                classpath = configurations.runtimeClasspath
            }

            tasks.named("validateExternalPlugins") {
                dependsOn(validationTask)
            }
        """
        validatePlugins {
            onPlugin("ProguardPlugin") {
                passes()
            }

 * it checks the plugins *applied to* the current build.
 */
gradle.beforeProject {
    val lifecycleTask = project.tasks.register("validateExternalPlugins")
    project.plugins.configureEach { configurePluginValidation(project, lifecycleTask, javaClass) }
}

fun configurePluginValidation(
    project: Project,
    lifecycleTask: TaskProvider<Task>,

            def failsValidation = validations.any { !it.messages.isEmpty() }
            def validation = owner.runner([
                "--init-script", "validate-external-gradle-plugin.gradle.kts",
                "validateExternalPlugins",
                "--continue",
                *extraParameters] as String[])
            validation.ignoreDeprecationWarnings("We are only checking type validation problems here")

            def result