def inputFiles = visitor.fileProperties*.propertyFiles*.files.flatten()
                    assert inputFiles.empty
                }
            }

            task customTask(type: CustomTask) {
                input = null
            }
        """

        expect:
        succeeds "customTask"

        where:
        annotation << [InputFile, InputDirectory, InputFiles]
    }

        LocalState        | '@LocalState'                                              | FileCollection | null
        InputFile         | '@InputFile @PathSensitive(PathSensitivity.NONE)'          | File           | "new File(\"input.txt\")"
        InputFiles        | '@InputFiles @PathSensitive(PathSensitivity.NAME_ONLY)'    | Set            | "new HashSet()"

    data class InitScripts(
        val fingerprints: List<InputFile>
    ) : ConfigurationCacheFingerprint()

    data class WorkInputs(
        val workDisplayName: String,
        val fileSystemInputs: FileCollectionInternal,
        val fileSystemInputsFingerprint: HashCode
    ) : ConfigurationCacheFingerprint()

    data class InputFile(
        val file: File,
        val hash: HashCode

    override fun transform(outputs: TransformOutputs) {
        val inputFile = inputArtifact.get().asFile
        println("Transforming ${inputFile.name}...")
        outputs.file("${inputFile.nameWithoutExtension}-summary.txt").run {
            writeText("${inputFile.name}: ${inputFile.length()}")
        }
    }
}

            }
        }
    }

    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