class Mg < Formula
  desc "Small Emacs-like editor"
  homepage "http://homepage.boetes.org/software/mg/"
  url "http://homepage.boetes.org/software/mg/mg-20131118.tar.gz"
  sha256 "b99fe10cb8473e035ff43bf3fbf94a24035e4ebb89484d48e5b33075d22d79f3"

  depends_on "clens"

  conflicts_with "mg3a", :because => "both install `mg` binaries"

  def install
    # makefile hardcodes include path to clens; since it's a
    # nonstandard path, Homebrew's standard include paths won't
    # fix this for people with nonstandard prefixes.
    # Note mg also has a Makefile; but MacOS make uses GNUmakefile
    inreplace "GNUmakefile", "$(includedir)/clens", "#{Formula["clens"].opt_include}/clens"

    system "make"
    bin.install "mg"
    doc.install "tutorial"
    man1.install "mg.1"
  end

  test do
    (testpath/"command.sh").write <<-EOS.undent
      #!/usr/bin/expect -f
      set timeout -1
      spawn #{bin}/mg
      match_max 100000
      send -- "\u0018\u0003"
      expect eof
    EOS
    chmod 0755, testpath/"command.sh"

    system testpath/"command.sh"
  end
end