class Ninvaders < Formula
  desc "Space Invaders in the terminal"
  homepage "http://ninvaders.sourceforge.net/"
  url "https://downloads.sourceforge.net/project/ninvaders/ninvaders/0.1.1/ninvaders-0.1.1.tar.gz"
  sha256 "bfbc5c378704d9cf5e7fed288dac88859149bee5ed0850175759d310b61fd30b"

  def install
    ENV.j1 # this formula's build system can't parallelize
    inreplace "Makefile" do |s|
      s.change_make_var! "CC", ENV.cc
      # gcc-4.2 doesn't like the lack of space here
      s.gsub! "-o$@", "-o $@"
    end
    system "make" # build the binary
    bin.install "nInvaders"
  end

  test do
    assert_match "nInvaders #{version}",
      shell_output("#{bin}/nInvaders -h 2>&1", 1)
  end
end