# CachyOS's Proton build (the proton-cachyos-slr package on CachyOS), from the
# upstream release, for programs.steam.extraCompatPackages. Same layout as
# nixpkgs' proton-ge-bin. The x86_64_v3 build is the one CachyOS installs on
# v3/v4/Zen 4 machines. It runs inside the Steam Linux Runtime, which Steam
# downloads by itself the first time a game uses it.
{
  lib,
  stdenvNoCC,
  fetchzip,
}:

stdenvNoCC.mkDerivation (finalAttrs: {
  pname = "proton-cachyos";
  version = "11.0-20261014";

  toolName = "proton-cachyos-${finalAttrs.version}-slr-x86_64_v3";

  src = fetchzip {
    url = "https://github.com/CachyOS/proton-cachyos/releases/download/cachyos-${finalAttrs.version}-slr/${finalAttrs.toolName}.tar.xz";
    hash = "sha256-fHi/LfyvPj2qm8ma6JH+wEJiJO1Htwp6zkbdRSg6Xic=";
  };

  dontUnpack = true;
  dontConfigure = true;
  dontBuild = true;

  outputs = [
    "out"
    "steamcompattool"
  ];

  installPhase = ''
    runHook preInstall
    echo "${finalAttrs.pname} should not be installed into environments. Use programs.steam.extraCompatPackages instead." > $out
    mkdir $steamcompattool
    ln -s $src/* $steamcompattool
    rm $steamcompattool/compatibilitytool.vdf
    cp $src/compatibilitytool.vdf $steamcompattool
    runHook postInstall
  '';

  # Register under CachyOS's own internal name, "proton-cachyos-slr": Steam stores
  # the default and per-game compatibility tool by that name, so the choices made
  # on CachyOS keep working, and they survive updates (no version in the name).
  preFixup = ''
    substituteInPlace "$steamcompattool/compatibilitytool.vdf" \
      --replace-fail '"display_name" "${finalAttrs.toolName}"' '"display_name" "proton-cachyos-${finalAttrs.version} (steam linux runtime)"' \
      --replace-fail '"${finalAttrs.toolName}"' '"proton-cachyos-slr"'
  '';

  meta = {
    description = "CachyOS's Proton build, for programs.steam.extraCompatPackages";
    homepage = "https://github.com/CachyOS/proton-cachyos";
    license = lib.licenses.bsd3;
    platforms = [ "x86_64-linux" ];
    sourceProvenance = [ lib.sourceTypes.binaryNativeCode ];
  };
})