packages: Add ringracers

Will be keeping this package here until it's in nixpkgs.

packages/ringracers.nix

@@ -0,0 +1,95 @@
+{ lib
+, stdenv
+, fetchzip
+, fetchFromGitHub
+, cmake
+, curl
+, nasm
+, game-music-emu
+, libpng
+, SDL2
+, SDL2_mixer
+, libvpx
+, libyuv
+, zlib
+, makeWrapper
+, makeDesktopItem
+, copyDesktopItems
+}:
+
+stdenv.mkDerivation (finalAttrs: {
+  pname = "ringracers";
+  version = "2.0";
+
+  src = fetchFromGitHub {
+    owner = "KartKrewDev";
+    repo = "RingRacers";
+    rev = "v${finalAttrs.version}";
+    hash = "sha256-fiKZg/WU8PRyR8RggYHSL0rVUBeFuuQdEKyIj/O0aN4=";
+  };
+
+  assets = fetchzip {
+    name = "${finalAttrs.pname}-${finalAttrs.version}-assets";
+    url = "https://github.com/KartKrewDev/RingRacers/releases/download/v${finalAttrs.version}/Dr.Robotnik.s-Ring-Racers-v${finalAttrs.version}-Assets.zip";
+    hash = "sha256-qTWDp5jfpBtEcYmzsxeE6XaohjCjSl/x8eXxnIdhCxY=";
+    stripRoot = false;
+  };
+
+  nativeBuildInputs = [
+    cmake
+    nasm
+    makeWrapper
+    copyDesktopItems
+  ];
+
+  buildInputs = [
+    curl
+    game-music-emu
+    libpng
+    SDL2
+    SDL2_mixer
+    libvpx
+    libyuv
+    zlib
+  ];
+
+  cmakeFlags = [
+    "-DSRB2_ASSET_DIRECTORY=${finalAttrs.assets}"
+    "-DGME_INCLUDE_DIR=${game-music-emu}/include"
+    "-DSDL2_MIXER_INCLUDE_DIR=${lib.getDev SDL2_mixer}/include/SDL2"
+    "-DSDL2_INCLUDE_DIR=${lib.getDev SDL2}/include/SDL2"
+  ];
+
+  desktopItems = [
+    (makeDesktopItem rec {
+      name = "Ring Racers";
+      exec = "ringracers";
+      icon = "ringracers";
+      comment = "Kart racing mod based on SRB2";
+      desktopName = name;
+      startupWMClass = ".ringracers-wrapped";
+      categories = [ "Game" ];
+    })
+  ];
+
+  installPhase = ''
+    runHook preInstall
+
+    install -Dm644 ../srb2.png $out/share/icons/hicolor/256x256/apps/ringracers.png
+    install -Dm755 bin/ringracers $out/bin/ringracers
+
+    wrapProgram $out/bin/ringracers \
+      --set RINGRACERSWADDIR "${finalAttrs.assets}"
+
+    runHook postInstall
+  '';
+
+  meta = with lib; {
+    description = "Kart racing video game based on Sonic Robo Blast 2 (SRB2), itself based on a modified version of Doom Legacy";
+    homepage = "https://kartkrew.org";
+    platforms = platforms.linux;
+    license = licenses.gpl2Plus;
+    maintainers = with maintainers; [ donovanglover ];
+    mainProgram = "ringracers";
+  };
+})