glamoroustoolkit: add .desktop entry (#413913)

pkgs/by-name/gl/glamoroustoolkit/package.nix

@@ -1,9 +1,11 @@
 {
   lib,
   stdenv,
+  fetchurl,
   fetchzip,
   wrapGAppsHook3,
   cairo,
+  copyDesktopItems,
   dbus,
   fontconfig,
   freetype,
@@ -19,12 +21,18 @@
   libglvnd,
   libuuid,
   libxcb,
+  makeDesktopItem,
   harfbuzz,
   libsoup_3,
   webkitgtk_4_1,
   zenity,
 }:
-
+let
+  gkIcon = fetchurl {
+    url = "https://gist.githubusercontent.com/qbit/cb52e6cd193c410e0b0aee8a216f6574/raw/2b042bde1dc4cbd30457f14c9d18c889444bf3d0/glamoroustoolkit.svg";
+    sha256 = "sha256-Trfo8P01anLq9yTFzwqIfsyidLGyuZDg48YQPrGBkgs=";
+  };
+in
 stdenv.mkDerivation (finalAttrs: {
   pname = "glamoroustoolkit";
   version = "1.1.24";
@@ -37,6 +45,7 @@ stdenv.mkDerivation (finalAttrs: {
 
   nativeBuildInputs = [
     wrapGAppsHook3
+    copyDesktopItems
   ];
 
   sourceRoot = ".";
@@ -46,10 +55,21 @@ stdenv.mkDerivation (finalAttrs: {
   dontPatchELF = true;
   dontStrip = true;
 
+  desktopItems = with finalAttrs; [
+    (makeDesktopItem {
+      name = pname;
+      desktopName = "GlamorousToolkit";
+      exec = "GlamorousToolkit";
+      icon = "GlamorousToolkit";
+    })
+  ];
+
   installPhase = ''
     runHook preInstall
 
-    install -d $out/bin $out/lib
+    install -d $out/bin $out/lib $out/share/icons/hicolor/scalable/apps
+
+    cp ${gkIcon} $out/share/icons/hicolor/scalable/apps/GlamorousToolkit.svg
     cp -r $src/bin $src/lib $out/
     cp ${./GlamorousToolkit-GetImage} $out/bin/GlamorousToolkit-GetImage