def runGreetWith = { String greeting ->
            inDirectory('root')
            switch (systemPropertySource) {
                case SystemPropertySource.COMMAND_LINE:
                    return configurationCacheRun('greet', "-Dgreeting=$greeting")
                case SystemPropertySource.GRADLE_PROPERTIES:
                    file('root/gradle.properties').text = "systemProp.greeting=$greeting"

                @Input
                abstract Property<String> getGreeting()

                @TaskAction void run() { println greeting.get() }
            }

            def greetValueSource = providers.of(GreetValueSource) {}
            tasks.register("greet", MyTask) {
                greeting = greetValueSource
            }
        """)

        when:
        configurationCacheRun "greet"

        then: