class Glew < Formula
  desc "OpenGL Extension Wrangler Library"
  homepage "http://glew.sourceforge.net/"
  url "https://downloads.sourceforge.net/project/glew/glew/1.13.0/glew-1.13.0.tgz"
  mirror "https://mirrors.kernel.org/debian/pool/main/g/glew/glew_1.13.0.orig.tar.gz"
  sha256 "aa25dc48ed84b0b64b8d41cdd42c8f40f149c37fa2ffa39cd97f42c78d128bc7"
  head "https://github.com/nigels-com/glew.git"

  bottle do
    cellar :any
    sha256 "a0d99f5538ffc0a182f227934753b0129b5b6cdfdc790cf7ef208fb4d8b00845" => :el_capitan
    sha256 "351ff9dbee1b1307720a2e3ad8e86c28975b3bc2614cfbc7ae45492cb3810062" => :yosemite
    sha256 "a8d8c2095176c09b10667627de9861b0e35d310bcd860922a2be4037a3e6418c" => :mavericks
  end

  option :universal

  def install
    # Makefile directory race condition on lion
    ENV.deparallelize

    if build.universal?
      ENV.universal_binary

      # Do not strip resulting binaries; https://sourceforge.net/p/glew/bugs/259/
      ENV["STRIP"] = ""
    end

    inreplace "glew.pc.in", "Requires: @requireslib@", ""
    system "make", "GLEW_PREFIX=#{prefix}", "GLEW_DEST=#{prefix}", "all"
    system "make", "GLEW_PREFIX=#{prefix}", "GLEW_DEST=#{prefix}", "install.all"

    doc.install Dir["doc/*"]
  end

  test do
    (testpath/"test.c").write <<-EOS.undent
      #include <GL/glew.h>
      #include <GLUT/glut.h>

      int main(int argc, char** argv) {
        glutInit(&argc, argv);
        glutCreateWindow("GLEW Test");
        GLenum err = glewInit();
        if (GLEW_OK != err) {
          return 1;
        }
        return 0;
      }
    EOS
    system ENV.cc, "-framework", "OpenGL", "-framework", "GLUT",
           "-lglew", testpath/"test.c", "-o", "test"
    system "./test"
  end
end