Ultrastar (#26524)

* ultrastardx-beta: init at 1.3.5

* libbass, libbass_fx: init at 24

* ultrastar-creator: init at 2017-04-12

* buildSupport/plugins.nix: add diffPlugins

Helper function to compare expected plugin lists to the found plugins.

* ultrastar-manager: init at 2017-05-24

The plugins are built in their own derivations, speeding up (re-)compilation.
The `diffPlugins` function from `beets` is reused to test for changes in the
plugin list on updates.

* beets: switch to diffPlugins

The function is basically just extracted for better reusability.

pkgs/games/ultrastardx/1.3-beta.nix

@@ -0,0 +1,49 @@
+{ stdenv, autoreconfHook, fetchFromGitHub, pkgconfig
+, lua, fpc, pcre, portaudio, freetype, libpng
+, SDL2, SDL2_image, SDL2_gfx, SDL2_mixer, SDL2_net, SDL2_ttf
+, ffmpeg, sqlite, zlib, libX11, mesa }:
+
+let
+  sharedLibs = [
+    pcre portaudio freetype
+    SDL2 SDL2_image SDL2_gfx SDL2_mixer SDL2_net SDL2_ttf
+    sqlite lua zlib libX11 mesa ffmpeg
+  ];
+
+in stdenv.mkDerivation rec {
+  name = "ultrastardx-${version}";
+  version = "1.3.5-beta";
+  src = fetchFromGitHub {
+    owner = "UltraStar-Deluxe";
+    repo = "USDX";
+    rev = "v${version}";
+    sha256 = "0qp64qsj29a08cbv3i52jm1w2pcklw6ya5sniycs24zxggza5pkn";
+  };
+
+  buildInputs = [
+    pkgconfig autoreconfHook
+    fpc libpng
+  ] ++ sharedLibs;
+
+  postPatch = ''
+    # autoconf substitutes strange things otherwise
+    substituteInPlace src/config.inc.in \
+      --subst-var-by libpcre_LIBNAME libpcre.so.1
+  '';
+
+  preBuild = with stdenv.lib;
+    let items = concatMapStringsSep " " (x: "-rpath ${getLib x}/lib") sharedLibs;
+    in ''
+      export NIX_LDFLAGS="$NIX_LDFLAGS ${items}"
+    '';
+
+  # dlopened libgcc requires the rpath not to be shrinked
+  dontPatchELF = true;
+
+  meta = with stdenv.lib; {
+    homepage = http://ultrastardx.sourceforge.net/;
+    description = "Free and open source karaoke game";
+    license = licenses.gpl2Plus;
+    maintainers = with maintainers; [ profpatsch ];
+  };
+}