}
        }
    }

    def "single root file are represented as roots"() {
        given:
        withBuildCache()
        file('inputFile').text = 'inputFile'
        buildScript """
            task copy(type:Copy) {
               from 'inputFile'
               into 'destDir'
            }
        """
        when:
        succeeds("copy")

        then:

                    return "an input to $workDisplayName has changed"
                }
            }
            is ConfigurationCacheFingerprint.InputFile -> input.run {
                return when (checkFileUpToDateStatus(file, hash)) {
                    FileUpToDateStatus.ContentsChanged -> "file '${displayNameOf(file)}' has changed"

sealed class RegisteredProperty {

    data class Input(
        val propertyName: String,
        val propertyValue: PropertyValue,
        val optional: Boolean
    ) : RegisteredProperty()

    data class InputFile(
        val propertyName: String,
        val propertyValue: PropertyValue,
        val optional: Boolean,
        val filePropertyType: InputFilePropertyType,
        val behavior: InputBehavior,

            }
        }

        abstract fun write(value: ConfigurationCacheFingerprint, trace: PropertyTrace? = null)

        fun inputFile(file: File) =
            InputFile(
                file,
                host.hashCodeOf(file)
            )

        fun inputFileSystemEntry(file: File) =
            InputFileSystemEntry(file, fileSystemEntryType(file))

    def "task with broken symlink in InputFiles is valid"() {
        def inputFileTarget = file("brokenInputFileTarget")
        def brokenInputFile = file('brokenInputFile').createLink(inputFileTarget)
        def output = file("output.txt")

        buildFile << """
            class CustomTask extends DefaultTask {

                @InputFiles FileCollection brokenInputFiles

abstract class AllTypes extends DefaultTask {

    //inputs
    @Input
    final abstract Property<String> inputString = ""
    @InputFile
    final abstract RegularFileProperty inputFile = ""
    @InputDirectory
    final abstract DirectoryProperty inputDirectory = ""
    @InputFiles
    final abstract ConfigurableFileCollection inputFileCollection = ""
    @Classpath

        testDirectory.file("buildSrc/build.gradle") << """
            def inputFile = file("testInput.txt")
            def echoTask = tasks.register("echo") {
                doLast {
                    def fin = new FileInputStream(inputFile)
                    try {
                        System.out.bytes = fin.bytes
                    } finally {

                            Thread.sleep(1000)
                        }
                    }
                }
            }

            abstract class Extract extends DefaultTask {
                @InputFile
                abstract RegularFileProperty getArchiveFile()
                @OutputDirectory
                abstract DirectoryProperty getDestinationDir()

                @Inject

        // Documentation
        failureDescriptionContains(documentationRegistry.getDocumentationRecommendationFor("information", "validation_problems", "unsupported_value_type"))

        where:
        annotation    | _
        "@Input"      | _
        "@InputFile"  | _
        "@InputFiles" | _
    }

    def "can use #type as task input"() {

                public File getInputDirectory() {
                    return new File("input");
                }

                @InputFile
                public File getInputFile() {
                    return new File("input.txt");
                }

                @InputFiles
                public Set<File> getInputFiles() {
                    return Collections.emptySet();
                }

                @Input