You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: streamripper.rb
    path of file: ./repos/homebrew-core/Formula/s
    
    the code of the file until where you have to start completion: class Streamripper < Formula
  desc "Separate tracks via Shoutcasts title-streaming"
  homepage "https://streamripper.sourceforge.net/"
  url "https://downloads.sourceforge.net/pr
    
  def install
    # the Makefile ignores CPPFLAGS from the environment, which
    # breaks the build when HOMEBREW_PREFIX is not /usr/local
    ENV.append_to_cflags ENV.cppflags

    # remove bundled libmad
    (buildpath/"libmad-0.15.1b").rmtree

    chmod 0755, "./install-sh" # or "make install" fails

    system "./configure", *std_configure_args
    system "make", "install"
  end