@$OutputFile.name
                File outputFile2 = new File(temporaryDir, "output2.txt")

                @$OutputFile.name
                File outputFile1 = new File(temporaryDir, "output1.txt")

                @$TaskAction.name
                void generate() {
                    outputFile1.text = "done1"
                    outputFile2.text = "done2"
                }

                @PathSensitive(PathSensitivity.NONE)
                File inputFile

                @OutputFiles
                Map<String, File> outputFiles

                @TaskAction
                void doSomething() {
                    outputFiles.each { String key, File outputFile ->
                        outputFile.text = key
                    }
                }
            }
        """

                @Input
                String message = "Hello World"
                @OutputFile
                File outputFile = new File(temporaryDir, "output.txt")

                @TaskAction
                void generate() {
                    outputFile.text = message
                }
            }

            @DisableCachingByDefault

            }
        """.stripIndent()


        def outputFile = file('build/output.txt')
        outputFile.text = "pre-existing"
        file('input.txt').text = 'input file'

        expect:
        fails('myTask')
        failureDescriptionContains(cannotCreateRootOfFileTree {
            property('output')
                .dir(outputFile)
                .includeLink()
        })

import org.gradle.api.tasks.Nested;
import org.gradle.api.tasks.Optional;
import org.gradle.api.tasks.OutputDirectories;
import org.gradle.api.tasks.OutputDirectory;
import org.gradle.api.tasks.OutputFile;
import org.gradle.api.tasks.OutputFiles;
import org.gradle.api.tasks.PathSensitive;
import org.gradle.api.tasks.SkipWhenEmpty;
import org.gradle.api.tasks.UntrackedTask;
import org.gradle.api.tasks.options.OptionValues;

                    def buildDirectory = projectLayout.buildDirectory
                    inputFiles.files.each { File inputFile ->
                        def outputFile = buildDirectory.file(inputFile.name + ".out").get().asFile
                        GFileUtils.copyFile(inputFile, outputFile)
                    }
                }
            }
            allprojects {
                apply plugin: 'java-library'

    final abstract ConfigurableFileCollection inputClasspath = ""

    // outputs
    @OutputFile
    final abstract RegularFileProperty outputFile = ""
    @OutputDirectory
    final abstract DirectoryProperty outputDirectory = ""
    @OutputFiles
    final abstract ConfigurableFileCollection outputFiles = ""
    @OutputDirectories
    final abstract ConfigurableFileCollection outputDirectories = ""
}

                }
            }

            for (Path outputFile : (Iterable<Path>) outputFiles::iterator) {
                if (Files.isDirectory(outputFile)) {
                    continue;
                }

                long outputFileLastModified =
                        Files.getLastModifiedTime(outputFile).toMillis();
                if (outputFileLastModified > artifactLastModified) {

        }
    }

    private fun dumpClassFiles(outputFiles: List<KaCompiledFile>): String {
        val classes = outputFiles
            .filter { it.path.endsWith(".class", ignoreCase = true) }
            .also { check(it.isNotEmpty()) }
            .sortedBy { it.path }
            .map { outputFile ->
                val classReader = ClassReader(outputFile.content)

        Input             | '@Input'                                                   | String         | "\"value\""
        OutputFile        | '@OutputFile'                                              | File           | "new File(\"output.txt\")"
        OutputFiles       | '@OutputFiles'                                             | Map            | "new HashMap<String, File>()"