def "detects when outputs are removed for tasks without sources"() {
        buildFile << """
            apply plugin: 'base'

            abstract class Producer extends DefaultTask {
                @InputDirectory
                @SkipWhenEmpty
                abstract DirectoryProperty getSources()

                @OutputDirectory
                abstract DirectoryProperty getOutputDir()

      | Creator: 	Project.<init>.tasks()
    + assemble
          | Type:   	org.gradle.api.DefaultTask
          | Value:  	task ':assemble'
          | Creator: 	Project.<init>.tasks.assemble()
          | Rules:
             ⤷ copyToTaskContainer
    + build
          | Type:   	org.gradle.api.DefaultTask
          | Value:  	task ':build'
          | Creator: 	Project.<init>.tasks.build()
          | Rules:

        def root = file("root").createDir()
        def target = file("target")
        def link = root.file("link")
        buildFile << """
            import java.nio.file.*
            class ProducesLink extends DefaultTask {
                @OutputDirectory Path outputDirectory

                @TaskAction execute() {
                    def link = Paths.get('${link}')
                    Files.deleteIfExists(link);

                import ${DefaultTask.name};
                import ${ConfigurableFileCollection.name};
                import ${InputFiles.name};
                import ${PathSensitive.name};
                import ${PathSensitivity.name};
                import ${TaskAction.name};

                public abstract class ResolveTask extends DefaultTask {
                    @InputFiles

        buildKotlinFile """
            abstract class PrintString : DefaultTask() {
                @get:Input
                abstract val string: Property<String>
                @TaskAction
                fun printString() {
                    println("The string is " + string.get())
                }
            }
            abstract class ProduceString : DefaultTask() {
                @get:OutputFile

 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.gradle.testfixtures

import org.gradle.api.DefaultTask
import org.gradle.api.tasks.TaskAction


class CustomTask extends DefaultTask {
    String property

    @TaskAction
    def doStuff() {
        property = 'some value'
    }

                    return new Placeholder(value: prop)
                }
            }

            class SomeBean {
                OtherBean value
            }

            class SomeTask extends DefaultTask {
                private final SomeBean bean = new SomeBean()
                private final OtherBean value

                SomeTask() {
                    value = new OtherBean(prop: 'a')

        server.start()

        given:
        createDirs("a", "b", "c")
        settingsFile << """
            include 'a', 'b', 'c'
        """
        buildFile << """
            class SlowTask extends DefaultTask {

                private final String projectName = project.name

                @TaskAction
                def go() {
                    ${server.callFromBuildUsingExpression("projectName")}
                }

            "org/gradle/api/DefaultTask": ["org/gradle/api/Task", "org/gradle/api/internal/TaskInternal"] as Set,
            "org/gradle/api/tasks/DefaultVerificationTask": ["org/gradle/api/tasks/VerificationTask"] as Set
        ])
        def directSuperTypes = [
            "B": ["org/gradle/api/DefaultTask"] as Set,
            "C": ["org/gradle/api/tasks/DefaultVerificationTask", "B"] as Set,

            class SomeBean {
                ${type} value
            }

            enum SomeEnum {
                One, Two
            }

            class SomeTask extends DefaultTask {
                private final SomeBean bean = new SomeBean()
                private final ${type} value

                SomeTask() {
                    value = ${reference}