class Tbb < Formula
  desc "Rich and complete approach to parallelism in C++"
  homepage "https://www.threadingbuildingblocks.org/"
  url "https://github.com/01org/tbb/archive/2019_U5.tar.gz"
  version "2019_U5"
  sha256 "2ea82d74dec50e18075b4982b8d360f8bd2bf2950f38e2db483aef82e0047444"

  bottle do
    cellar :any
    sha256 "dddaece3fa2a6f9956cfc960904bc783e8d514ee2062efa235896c920011d8eb" => :mojave
    sha256 "ff7652fd64198f0ad020c417b337efbc91a37e0f566f56a8ef237363e19dc338" => :high_sierra
    sha256 "42fe13b9961e7560bac489d4c4ed7b3e79ef6aba54d1d851fe851776e42a933c" => :sierra
  end

  depends_on "cmake" => :build
  depends_on "swig" => :build
  depends_on "python"

  def install
    compiler = (ENV.compiler == :clang) ? "clang" : "gcc"
    system "make", "tbb_build_prefix=BUILDPREFIX", "compiler=#{compiler}"
    lib.install Dir["build/BUILDPREFIX_release/*.dylib"]

    # Build and install static libraries
    system "make", "tbb_build_prefix=BUILDPREFIX", "compiler=#{compiler}",
                   "extra_inc=big_iron.inc"
    lib.install Dir["build/BUILDPREFIX_release/*.a"]
    include.install "include/tbb"

    cd "python" do
      ENV["TBBROOT"] = prefix
      system "python3", *Language::Python.setup_install_args(prefix)
    end

    system "cmake", "-DTBB_ROOT=#{prefix}",
                    "-DTBB_OS=Darwin",
                    "-DSAVE_TO=lib/cmake/TBB",
                    "-P", "cmake/tbb_config_generator.cmake"

    (lib/"cmake"/"TBB").install Dir["lib/cmake/TBB/*.cmake"]
  end

  test do
    (testpath/"test.cpp").write <<~EOS
      #include <tbb/task_scheduler_init.h>
      #include <iostream>

      int main()
      {
        std::cout << tbb::task_scheduler_init::default_num_threads();
        return 0;
      }
    EOS
    system ENV.cxx, "test.cpp", "-L#{lib}", "-ltbb", "-o", "test"
    system "./test"
  end
end