hyprland-desktop.nix

{
  services.xserver.displayManager = {
    sessionPackages = [
      (
        let sessionName = "Hyprland"; in pkgs.writeTextFile
          {
            name = sessionName;
            destination = "/share/wayland-sessions/${sessionName}.desktop";
            text = ''
              [Desktop Entry]
              Version=1.0
              Name=${sessionName}
              Type=Application
              Comment=An intelligent dynamic tiling Wayland compositor
              Exec=${pkgs.writeShellScriptBin sessionName ''
                . "${config.home.profileDirectory}/etc/profile.d/hm-session-vars.sh"

                if [ -e "$HOME/.profile" ]; then
                  . "$HOME/.profile"
                fi
                systemctl --user stop graphical-session.target graphical-session-pre.target

                ${lib.optionalString (config.xsession.importedVariables != [ ])
                ("systemctl --user import-environment "
                  + toString (lib.unique config.xsession.importedVariables))}

                ${lib.optionalString (config.wayland.windowManager.hyprland.nvidiaPatches) ''            
                  export LIBVA_DRIVER_NAME=nvidia
                  export GBM_BACKEND=nvidia-drm
                  export GDK_BACKEND=wayland
                  export __GLX_VENDOR_LIBRARY_NAME=nvidia
                  export WLR_NO_HARDWARE_CURSORS=1
                ''}
                export XDG_SESSION_TYPE=wayland
                # export GTK_USE_PORTAL=1
                export MOZ_GLX_TEST_EARLY_WL_ROUNDTRIP=1
                export NIXOS_OZONE_WL=1
                systemctl --user start hm-graphical-session.target
                systemctl --user start hyprland-session.target
                ${config.wayland.windowManager.hyprland.package}/bin/Hyprland
                systemctl --user stop hyprland-session.target
                systemctl --user stop hm-graphical-session.target
                systemctl --user stop graphical-session.target
                systemctl --user stop graphical-session-pre.target
                unset __HM_SESS_VARS_SOURCED
              ''}/bin/${sessionName}
            '';
          } // {
          providedSessions = [ sessionName ];
        }
      )
    ];
  };
}