private Copy _addTaskExpandCompileDependency(
      Project project,
      File file,
      File destinationDir,
      String taskNamePrefix,
      RenameDependencyClosure renameDependencyClosure) {

    String taskName = GradleUtil.getTaskName(taskNamePrefix, file);

    Copy copy = GradleUtil.addTask(project, taskName, Copy.class);

    copy.doFirst(
        new Action<Task>() {

          @Override
          public void execute(Task task) {
            Copy copy = (Copy) task;

            Project project = copy.getProject();

            project.delete(copy.getDestinationDir());
          }
        });

    copy.from(project.zipTree(file));

    String name = renameDependencyClosure.call(file.getName());

    name = name.substring(0, name.length() - 4);

    destinationDir = new File(destinationDir, name);

    copy.setDescription(
        "Expands " + file.getName() + " into " + project.relativePath(destinationDir) + ".");
    copy.setDestinationDir(destinationDir);

    return copy;
  }
  public static String getRelativePath(Project project, File file) {
    String relativePath = project.relativePath(file);

    return relativePath.replace('\\', '/');
  }