class Sip < Formula
  desc "Tool to create Python bindings for C and C++ libraries"
  homepage "https://www.riverbankcomputing.com/software/sip/intro"
  url "https://downloads.sourceforge.net/project/pyqt/sip/sip-4.19.6/sip-4.19.6.tar.gz"
  sha256 "9dda27ae181bea782ebc8768d29f22f85ab6e5128ee3ab21f491febad707925a"
  head "https://www.riverbankcomputing.com/hg/sip", :using => :hg

  bottle do
    cellar :any_skip_relocation
    sha256 "d0886b0789975637f27eaa7c4b3688ab54c81d9bb5471fd02961c6a7a6c45935" => :high_sierra
    sha256 "87dd330b2ad778cd581820def38a9c1d1acc864fafae9560bab45a34ad0833bc" => :sierra
    sha256 "01911c287b03a581c1038b6316416be599ddd28aff90f4dc145e6ab1768ab8c4" => :el_capitan
  end

  depends_on :python => :recommended
  depends_on :python3 => :recommended

  def install
    if build.without?("python3") && build.without?("python")
      odie "sip: --with-python3 must be specified when using --without-python"
    end

    if build.head?
      # Link the Mercurial repository into the download directory so
      # build.py can use it to figure out a version number.
      ln_s cached_download/".hg", ".hg"
      # build.py doesn't run with python3
      system "python", "build.py", "prepare"
    end

    Language::Python.each_python(build) do |python, version|
      ENV.delete("SDKROOT") # Avoid picking up /Application/Xcode.app paths
      system python, "configure.py",
                     "--deployment-target=#{MacOS.version}",
                     "--destdir=#{lib}/python#{version}/site-packages",
                     "--bindir=#{bin}",
                     "--incdir=#{include}",
                     "--sipdir=#{HOMEBREW_PREFIX}/share/sip"
      system "make"
      system "make", "install"
      system "make", "clean"
    end
  end

  def post_install
    (HOMEBREW_PREFIX/"share/sip").mkpath
  end

  def caveats; <<~EOS
    The sip-dir for Python is #{HOMEBREW_PREFIX}/share/sip.
  EOS
  end

  test do
    (testpath/"test.h").write <<~EOS
      #pragma once
      class Test {
      public:
        Test();
        void test();
      };
    EOS
    (testpath/"test.cpp").write <<~EOS
      #include "test.h"
      #include <iostream>
      Test::Test() {}
      void Test::test()
      {
        std::cout << "Hello World!" << std::endl;
      }
    EOS
    (testpath/"test.sip").write <<~EOS
      %Module test
      class Test {
      %TypeHeaderCode
      #include "test.h"
      %End
      public:
        Test();
        void test();
      };
    EOS
    (testpath/"generate.py").write <<~EOS
      from sipconfig import SIPModuleMakefile, Configuration
      m = SIPModuleMakefile(Configuration(), "test.build")
      m.extra_libs = ["test"]
      m.extra_lib_dirs = ["."]
      m.generate()
    EOS
    (testpath/"run.py").write <<~EOS
      from test import Test
      t = Test()
      t.test()
    EOS
    system ENV.cxx, "-shared", "-Wl,-install_name,#{testpath}/libtest.dylib",
                    "-o", "libtest.dylib", "test.cpp"
    system bin/"sip", "-b", "test.build", "-c", ".", "test.sip"
    Language::Python.each_python(build) do |python, version|
      ENV["PYTHONPATH"] = lib/"python#{version}/site-packages"
      system python, "generate.py"
      system "make", "-j1", "clean", "all"
      system python, "run.py"
    end
  end
end