File outputFile = new File(outputPath);
                        outputFiles.put(outputPath, OutputKind.OUTPUT);
                        File outputFileParent = outputFile.getParentFile();
                        while (outputFileParent != null) {
                            String parentPath = outputFileParent.getPath();
                            if (outputFiles.getIfPresent(parentPath) != null) {

        outputDirectories.add(outputDir);
        return outputDir;
    }

    @Override
    public File file(Object path) {
        File outputFile = resolveAndRegister(path, location -> GFileUtils.mkdirs(location.getParentFile()));
        outputFiles.add(outputFile);
        return outputFile;
    }

    private File resolveAndRegister(Object path, Consumer<File> prepareOutputLocation) {
        File output = resolver.resolve(path);

        @InputFile
        File inputFile
        @InputDirectory
        File inputDirectory
        @InputFiles
        File inputFiles
        @OutputFile
        File outputFile
        @OutputFiles
        Set<File> outputFiles
        @OutputDirectory
        File outputDirectory
        @OutputDirectories
        Set<File> outputDirectories
        @Destroys
        Set<File> destroys

        touch(task.outputFiles.get(0).getParentFile())

        when:
        execute(task)

        then:
        def e = thrown WorkValidationException
        validateException(task, e, cannotCreateParentDirectories {
            property('outputFiles')
                .file(task.outputFiles[0])
                .ancestorIsNotDirectory(task.outputFiles[0].parentFile)
                .includeLink()

    final inputFiles = [file: [inputFile], dir: [inputDir], missingFile: [missingInputFile]]
    final outputFiles = [file: outputFile, missingFile: missingOutputFile]
    final outputDirs = [emptyDir: emptyOutputDir, dir: outputDir, missingDir: missingOutputDir]
    final createFiles = [outputFile, outputDirFile, outputDirFile2] as Set

    def unitOfWork = builder.build()

                @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()
        })

                @OutputFile
                public File getOutputFile() {
                    return outputFile;
                }

                public void setOutputFile(File outputFile) {
                    this.outputFile = outputFile;
                }

                @Nested
                public NestedBeanWithAction getBean() {
                    return bean;
                }

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'