/** List of files to concatenate */
    private FileTree files;

    /** line to add at the top of the target file */
    private String headerLine;

    private File target;

    private List<String> additionalLines = new ArrayList<>();

    public void setFiles(FileTree files) {
        this.files = files;
    }

    @InputFiles
    public FileTree getFiles() {
        return files;
    }

    private boolean skipHasRestTestCheck;
    private FileCollection config;
    private FileCollection additionalConfig;
    private Function<FileCollection, FileTree> configToFileTree = FileCollection::getAsFileTree;
    private Function<FileCollection, FileTree> additionalConfigToFileTree = FileCollection::getAsFileTree;

    private final PatternFilterable patternSet;
    private final ProjectLayout projectLayout;

     * @return Returns the {@link FileTree} for main resources from Java projects. Returns null if no files exist.
     */
    @Nullable
    public static FileTree getJavaMainSourceResources(Project project, Action<? super PatternFilterable> filter) {
        final Optional<FileTree> mainFileTree = getJavaMainSourceSet(project).map(SourceSet::getResources).map(FileTree::getAsFileTree);

    private FileCollection xpackConfig;
    private FileCollection additionalConfig;
    private Function<FileCollection, FileTree> coreConfigToFileTree = FileCollection::getAsFileTree;
    private Function<FileCollection, FileTree> xpackConfigToFileTree = FileCollection::getAsFileTree;
    private Function<FileCollection, FileTree> additionalConfigToFileTree = FileCollection::getAsFileTree;

    private final PatternFilterable corePatternSet;

import org.elasticsearch.gradle.internal.precommit.ValidateYamlAgainstSchemaTask;
import org.gradle.api.Plugin;
import org.gradle.api.Project;
import org.gradle.api.file.Directory;
import org.gradle.api.file.FileTree;
import org.gradle.api.file.ProjectLayout;
import org.gradle.api.provider.Provider;
import org.gradle.api.tasks.TaskProvider;
import org.gradle.api.tasks.util.PatternSet;

import java.io.File;

import org.apache.tools.ant.taskdefs.condition.Os;
import org.gradle.api.DefaultTask;
import org.gradle.api.GradleException;
import org.gradle.api.file.FileCollection;
import org.gradle.api.file.FileTree;
import org.gradle.api.file.ProjectLayout;
import org.gradle.api.provider.ListProperty;
import org.gradle.api.tasks.InputFiles;
import org.gradle.api.tasks.Internal;
import org.gradle.api.tasks.OutputFile;

      project.delete(uploadFile)
    }

    try {
      ant.tar(destfile: uploadFile, compression: "bzip2", longfile: "gnu") {
        fileset(dir: projectDir) {
          Set<File> fileSet = fileTree(projectDir) {
            include("**/*.hprof")
            include("**/reaper.log")
            include("**/build/test-results/**/*.xml")
            include("**/build/testclusters/**")

import org.gradle.api.file.ArchiveOperations;
import org.gradle.api.file.ConfigurableFileCollection;
import org.gradle.api.file.DirectoryProperty;
import org.gradle.api.file.FileSystemOperations;
import org.gradle.api.file.FileTree;
import org.gradle.api.internal.initialization.ClassLoaderScope;
import org.gradle.api.tasks.CacheableTask;
import org.gradle.api.tasks.Classpath;
import org.gradle.api.tasks.OutputDirectory;

            }
        });

        RestTestTransformer transformer = new RestTestTransformer();
        // TODO: instead of flattening the FileTree here leverage FileTree.visit() so we can preserve folder hierarchy in a more robust way
        for (File file : getTestFiles().getFiles()) {
            YAMLParser yamlParser = YAML_FACTORY.createParser(file);

import org.gradle.api.DefaultTask;
import org.gradle.api.NamedDomainObjectContainer;
import org.gradle.api.Task;
import org.gradle.api.file.FileCollection;
import org.gradle.api.file.FileTree;
import org.gradle.api.file.ProjectLayout;
import org.gradle.api.tasks.Classpath;
import org.gradle.api.tasks.Input;
import org.gradle.api.tasks.OutputFile;
import org.gradle.api.tasks.SourceSet;