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: cpm.rb
    path of file: ./repos/homebrew-core/Formula/c
    
    the code of the file until where you have to start completion: class Cpm < Formula
  desc "Fast CPAN module installer"
  homepage "https://metacpan.org/pod/cpm"
  url "https://cpan.metacpan.org/authors/id/S/SK/SKAJI/App-cpm-0.997015.tar.gz"
  sha256 "623f8c67287d864b5fb1cd9c70aaa2a31c82c245c
    
  def install
    ENV.prepend_create_path "PERL5LIB", libexec/"lib/perl5"

    build_pl = [
      "Module::Build::Tiny",
      "Module::cpmfile",
      "Command::Runner",
      "Parallel::Pipes",
    ]

    resources.each do |r|
      r.stage do
        next if build_pl.include? r.name

        system "perl", "Makefile.PL", "INSTALL_BASE=#{libexec}"
        system "make", "install"
      end
    end

    build_pl.each do |name|
      resource(name).stage do
        system "perl", "Build.PL", "--install_base", libexec
        system "./Build"
        system "./Build", "install"
      end
    end

    system "perl", "Build.PL", "--install_base", libexec
    system "./Build"
    system "./Build", "install"

    (bin/"cpm").write_env_script("#{libexec}/bin/cpm", PERL5LIB: ENV["PERL5LIB"])
    man1.install_symlink libexec/"man/man1/cpm.1"
    man3.install_symlink Dir[libexec/"man/man3/App::cpm*"].reject { |f| File.empty?(f) }
  end