python.pkgs.pygame_sdl2: move to separate expression

pkgs/development/python-modules/pygame_sdl2/default.nix

@@ -0,0 +1,33 @@
+{ stdenv, pkgs, buildPythonPackage, fetchFromGitHub
+, cython, SDL2, SDL2_image, SDL2_ttf, SDL2_mixer, libjpeg, libpng }:
+
+buildPythonPackage rec {
+  pname = "pygame_sdl2";
+  version = "6.99.10.1227";
+  name = "${pname}-${version}";
+
+  src = fetchFromGitHub {
+    owner = "renpy";
+    repo = "${pname}";
+    rev = "renpy-${version}";
+    sha256 = "10n6janvqh5adn7pcijqwqfh234sybjz788kb8ac6b4l11hy2lx1";
+  };
+
+  buildInputs = [
+    SDL2 SDL2_image SDL2_ttf SDL2_mixer
+    cython libjpeg libpng
+  ];
+
+  postInstall = ''
+    ( cd "$out"/include/python*/ ;
+      ln -s pygame-sdl2 pygame_sdl2 || true ; )
+  '';
+
+  meta = with stdenv.lib; {
+    description = "A reimplementation of parts of pygame API using SDL2";
+    homepage    = "https://github.com/renpy/pygame_sdl2";
+    # Some parts are also available under Zlib License
+    license     = licenses.lgpl2;
+    maintainers = with maintainers; [ raskin ];
+  };
+}