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: zbar.rb
    path of file: ./repos/homebrew-core/Formula/z
    
    the code of the file until where you have to start completion: class Zbar < Formula
  desc "Suite of barcodes-reading tools"
  homepage "https://github.com/mchehab/zbar"
  url "https://linuxtv.org/downloads/zbar/zbar-0.23.93.tar.bz2"
  sha256 "83be8f85fc7c288fd91f98d52fc55db7eedbddcf10a83d9221d703463
    
  def install
    ENV["XML_CATALOG_FILES"] = etc/"xml/catalog"
    system "autoreconf", "--force", "--install", "--verbose" if build.head?
    system "./configure", *std_configure_args,
                          "--disable-silent-rules",
                          "--disable-video",
                          "--without-python",
                          "--without-qt",
                          "--without-gtk",
                          "--without-x"
    system "make", "install"
  end