def explore
      paths = if Config.explore_role_files?
                possible_paths
              else
                [get_path]
              end
      paths.find {|path| File.readable?(path) } || paths.last
    end
def explore
      paths = if Config.explore_role_files?
                possible_paths
              else
                [get_path]
              end
      paths.find {|path| File.readable?(path) } || paths.last
    end
Returns readable role file exploring possible role files. For example,
 if `role` is `myapp-web-staging`, this method explores files as

 1. myapp-web-staging.yml
 1. myapp-web-base.yml
 1. myapp-web.yml
 1. myapp-base.yml
 1. myapp.yml
 1. base.yml

 @return [String] detected file path or last candidate path