buildFile << """
            task greeting(type: CustomTask) {
                greeting = 'yo configuration cache'
            }
        """
        def configurationCache = newConfigurationCacheFixture()

        when:
        configurationCacheRun("greeting")

        then:
        result.assertTaskExecuted(":buildSrc:jar")
        result.assertTaskExecuted(":greeting")

        when:

====
include::sample[dir="snippets/plugins/greeting/kotlin", files="buildSrc/src/main/kotlin/greetings.gradle.kts[tags=task]"]
include::sample[dir="snippets/plugins/greeting/groovy", files="buildSrc/src/main/groovy/greetings.gradle[tags=task]"]
====

----
$ gradle -q hello
include::{snippetsPath}/plugins/greeting/tests/greeting.out[]
----

        def producer = file('producer')
        def consumer = file('consumer')
        def pluginModule = mavenRepo.module('com.example', 'producer', '1.0')
        def pluginMarker = mavenRepo.module('com.example.greeting', 'com.example.greeting.gradle.plugin', '1.0')

        producer.file('settings.gradle') << ''
        producer.file('build.gradle') << """
            plugins {
                id('java-gradle-plugin')

        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"

        then:
        subprojectDir.file("src/main/cpp").assertHasDescendants(SAMPLE_LIB_CLASS)
        subprojectDir.file("src/main/public").assertHasDescendants("greeting.h")
        subprojectDir.file("src/test/cpp").assertHasDescendants(SAMPLE_LIB_TEST_CLASS)

        and:
        subprojectDir.file("src/main/public/greeting.h").text.contains("namespace greeting {")

import org.junit.jupiter.api.Test
import org.junit.jupiter.api.Assertions.assertNotNull

class AppTest {
    @Test
    fun appHasAGreeting() {
        val classUnderTest = App()
        assertNotNull(classUnderTest.greeting, "app should have a greeting")
    }

        and:
        commonJvmFilesGenerated(scriptDsl)

        when:
        run("build")

        then:
        assertTestPassed("org.example.AppTest", "application has a greeting")

        when:
        run("run")

        then:
        outputContains("Hello World!")

        where:
        scriptDsl << ScriptDslFixture.SCRIPT_DSLS
    }

        and:
        commonJvmFilesGenerated(scriptDsl)

        when:
        run("build")

        then:
        assertTestPassed("org.example.AppSuite", "App has a greeting")

        when:
        run("run")

        then:
        outputContains("Hello, world!")

        where:
        scriptDsl << ScriptDslFixture.SCRIPT_DSLS
    }

        //ibm vm 1.6 + windows XP gotchas:
        //we need to print something else to the stream after we print the daemon greeting.
        //without it, the parent hangs without receiving the message above (flushing does not help).
        LOGGER.debug("Completed writing the daemon greeting. Closing streams...");
        //btw. the ibm vm+winXP also has some issues detecting closed streams by the child but we handle this problem differently.

                    }
                """
                break
            case Language.KOTLIN:
                writeSourceFile "kotlin", "${className}.kt", """
                    open class ${className} : ${DefaultTask.name}() {
                        @${TaskAction.name} fun greet() { println("${greeting}") }
                    }
                """