{ pkgs, ... }:

let
  lib = pkgs.lib;
  nixGL = pkgs.callPackage
    (fetchTarball "https://github.com/guibou/nixGL/archive/master.tar.gz") {
      inherit pkgs;
    };
in {
  inherit nixGL;

  nixGLWrapMaybe = let
    makeGLWrapper = pkg: cmd:
      with nixGL;
      pkgs.writeScriptBin cmd ''
        #!${pkgs.stdenv.shell}
        exec ${nixGLCommon nixGLIntel}/bin/nixGL ${pkg}/bin/${cmd} "$@"
      '';
    nixGLWrap = pkg: cmd:
      let wrapped = makeGLWrapper pkg cmd;
      in pkgs.symlinkJoin {
        name = "nixGL-${pkg.name}";
        paths = [ wrapped pkg ];
      };
    isNixOS = builtins.pathExists /etc/NIXOS;
  in pkg: cmd: if isNixOS then pkg else (nixGLWrap pkg cmd);

  capitalise = str:
    let chars = lib.stringToCharacters str;
    in lib.concatStrings
    ([ (lib.toUpper (lib.head chars)) ] ++ (lib.tail chars));
}