def relative_path_from(root_path, path)
      project_path = Pathname.new(path)
      return project_path if project_path.relative?
      project_path.relative_path_from(root_path)
    end
def relative_path_from(root_path, path)
      project_path = Pathname.new(path)
      return project_path if project_path.relative?
      project_path.relative_path_from(root_path)
    end
Extract a relative path for the app

 @api private