class Swig < Formula
  desc "Generate scripting interfaces to C/C++ code"
  homepage "http://www.swig.org/"
  url "https://downloads.sourceforge.net/project/swig/swig/swig-4.0.0/swig-4.0.0.tar.gz"
  sha256 "e8a39cd6437e342cdcbd5af27a9bf11b62dc9efec9248065debcb8276fcbb925"

  bottle do
    sha256 "9eff7a235762c2727dfdb767217be4a48a55f29efcae5fedc450c3dfeb806904" => :mojave
    sha256 "aed79cb436b3a0ac5812c4085e3121ffd62866397b8c7eaa06815ed8ec1e22b7" => :high_sierra
    sha256 "af4c42215d5c7c042d83e98aecb70958acd73038dfc2b59d1854f2287fb50980" => :sierra
  end

  head do
    url "https://github.com/swig/swig.git"

    depends_on "autoconf" => :build
    depends_on "automake" => :build
  end

  depends_on "pcre"

  def install
    system "./autogen.sh" if build.head?
    system "./configure", "--disable-dependency-tracking",
                          "--prefix=#{prefix}"
    system "make"
    system "make", "install"
  end

  test do
    (testpath/"test.c").write <<~EOS
      int add(int x, int y)
      {
        return x + y;
      }
    EOS
    (testpath/"test.i").write <<~EOS
      %module test
      %inline %{
      extern int add(int x, int y);
      %}
    EOS
    (testpath/"run.rb").write <<~EOS
      require "./test"
      puts Test.add(1, 1)
    EOS
    system "#{bin}/swig", "-ruby", "test.i"
    system ENV.cc, "-c", "test.c"
    system ENV.cc, "-c", "test_wrap.c", "-I#{MacOS.sdk_path}/System/Library/Frameworks/Ruby.framework/Headers/"
    system ENV.cc, "-bundle", "-undefined", "dynamic_lookup", "test.o", "test_wrap.o", "-o", "test.bundle"
    assert_equal "2", shell_output("/usr/bin/ruby run.rb").strip
  end
end