nix-dotfiles/pkgs/celeste/default.nix

{
  stdenvNoCC,
  lib,
  requireFile,
  unzip,
  copyDesktopItems,
  xxd,
  makeWrapper,
  SDL2,
  mono,
  makeDesktopItem,
  libfmodstudio_fix,
  libfmodstudio,
  libfna3d,
  libfmodsdl,
}:
stdenvNoCC.mkDerivation rec {
  name = "celeste-game";
  version = "1.4.0.0";

  src = requireFile {
    name = "celeste-linux.zip";
    url = "https://maddymakesgamesinc.itch.io/celeste";
    hash = "sha256-q4gniSgg00U3j5TZpvIZnSmqAyCHd/pOVAuQ3rDYEAs=";
  };
  sourceRoot = "."; # needed for multiple directories

  nativeBuildInputs = [
    unzip # for unzipping
    copyDesktopItems # will help!
    makeWrapper
    xxd
  ];

  buildInputs = [
    libfmodstudio_fix
    libfmodstudio
    libfna3d
    SDL2
    libfmodsdl

    mono
  ];

  strictDeps = true;
  dontConfigure = true;

  patchPhase = ''
    # patch celeste
    runHook prePatch
    # TODO: i don't know what this magic string does and it bothers me
    # TODO: convert these to patch files?
    xxd -p < Celeste.exe | tr -d '\n' | LC_ALL=C sed 's/03000616fe012a0013300200210000000a000011160a02145112012014100100/03000616fe012a0013300200210000000a000011160a02145112012006020200/g' | xxd -r -p > Celeste.exe.patched
    mv Celeste.exe.patched Celeste.exe

    # this cannot possibly be the best way of doing this
    cat >Celeste.exe.config <<EOF
    <?xml version="1.0" encoding="utf-8"?>
    <configuration>
    	<dllmap dll="fmod" os="linux" target="libfmod.so.13"/>
    	<dllmap dll="fmodstudio" os="linux" target="libfmodstudio.so.13">
    		<dllentry dll="fmodstudio_fix.so" name="FMOD_Studio_EventInstance_SetParameterValue" target="_FMOD_Studio_EventInstance_SetParameterValue"/>
    		<dllentry dll="fmodstudio_fix.so" name="FMOD_Studio_System_Create" target="_FMOD_Studio_System_Create"/>
    		<dllentry dll="fmodstudio.so.13" name="FMOD_Studio_System_GetLowLevelSystem" target="FMOD_Studio_System_GetCoreSystem"/>
    		<dllentry dll="fmodstudio.so.13" name="FMOD_Studio_EventInstance_TriggerCue" target="FMOD_Studio_EventInstance_KeyOff"/>
    	</dllmap>
    </configuration>
    EOF

    runHook postPatch
  '';

  dontBuild = true;

  installPhase = ''
    runHook preInstall # these get clobbered

    mkdir -p $out/{bin,lib}
    cp Celeste.exe Celeste.exe.config Celeste.pdb $out/lib
    cp Celeste.Content.dll Celeste.Content.pdb $out/lib
    cp FNA.dll FNA.dll.config FNA3D.dll $out/lib
    cp -r Content/ $out/lib
    cp -r Backups/ $out/lib
    cp gamecontrollerdb.txt $out/lib

    mkdir -p $out/share/icons/hicolor/512x512/apps
    cp Celeste.png $out/share/icons/hicolor/512x512/apps

    runHook postInstall
  '';

  postFixup = ''
    makeWrapper "${mono}/bin/mono" "$out/bin/celeste-game" \
      --add-flags "--debug $out/lib/Celeste.exe" \
      --prefix LD_LIBRARY_PATH : ${
        lib.makeLibraryPath [
          "$out"
          libfmodstudio_fix
          libfmodstudio
          libfna3d
          SDL2
          libfmodsdl
        ]
      }
  '';

  desktopItems = [
    (makeDesktopItem {
      name = name;
      exec = "celeste-game %U";
      icon = "Celeste";
      comment = "Just breathe. You can do this..."; # should be an actual description of Celeste
      desktopName = "Celeste";
      categories = [
        "Game"
        "Application"
      ];
    })
  ];

  meta = { };
}