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: gpredict.rb
    path of file: ./repos/homebrew-core/Formula/g
    
    the code of the file until where you have to start completion: class Gpredict < Formula
  desc "Real-time satellite tracking/prediction application"
  homepage "http://gpredict.oz9aec.net/"
  license "GPL-2.0-or-later"
  revision 4

  stable do
   
    
  def install
    ENV.prepend_path "PERL5LIB", Formula["perl-xml-parser"].libexec/"lib/perl5" if OS.linux?

    if build.head?
      inreplace "autogen.sh", "libtoolize", "glibtoolize"
      system "./autogen.sh", *std_configure_args
    else
      system "autoreconf", "--force", "--install", "--verbose" # TODO: remove in the next release
      system "./configure", *std_configure_args
    end