yquake2: add desktop item

pkgs/games/quake2/yquake2/default.nix

···
-{ stdenv, lib, fetchFromGitHub, buildEnv, makeWrapper
+{ stdenv, lib, fetchFromGitHub, buildEnv, makeWrapper, copyDesktopItems, makeDesktopItem
 , SDL2, libGL, curl
 , openalSupport ? true, openal
 , Cocoa, OpenAL
···
 
   games = import ./games.nix { inherit stdenv lib fetchFromGitHub; };
 
-  wrapper = import ./wrapper.nix { inherit stdenv lib buildEnv makeWrapper yquake2; };
+  wrapper = import ./wrapper.nix { inherit stdenv lib buildEnv makeWrapper yquake2 copyDesktopItems makeDesktopItem; };
 
   yquake2 = stdenv.mkDerivation rec {
     pname = "yquake2";
···
       "WITH_SYSTEMDIR=$\{out}/share/games/quake2"
     ];
 
+    nativeBuildInputs = [ copyDesktopItems ];
+
     enableParallelBuilding = true;
 
     installPhase = ''
+      runHook preInstall
       # Yamagi Quake II expects all binaries (executables and libs) to be in the
       # same directory.
       mkdir -p $out/bin $out/lib/yquake2 $out/share/games/quake2/baseq2
···
       ln -s $out/lib/yquake2/quake2 $out/bin/yquake2
       ln -s $out/lib/yquake2/q2ded $out/bin/yq2ded
       cp $src/stuff/yq2.cfg $out/share/games/quake2/baseq2
+      install -Dm644 stuff/icon/Quake2.png $out/share/pixmaps/yamagi-quake2.png;
+      runHook postInstall
     '';
+
+    desktopItems = [ (makeDesktopItem {
+      name = "yquake2";
+      exec = "yquake2";
+      icon = "yamagi-quake2";
+      desktopName = "yquake2";
+      comment = "Yamagi Quake II client";
+      categories = [ "Game" "Shooter" ];
+    })];
 
     meta = with lib; {
       description = "Yamagi Quake II client";

pkgs/games/quake2/yquake2/games.nix

···
     };
 
     installPhase = ''
+      runHook preInstall
       mkdir -p $out/lib/yquake2/${id}
       cp release/* $out/lib/yquake2/${id}
+      runHook postInstall
     '';
 
     meta = with lib; {

pkgs/games/quake2/yquake2/wrapper.nix

···
-{ stdenv, lib, buildEnv, makeWrapper, yquake2 }:
+{ stdenv, lib, buildEnv, makeWrapper, yquake2, copyDesktopItems, makeDesktopItem }:
 
 { games
 , name
···
     paths = [ yquake2 ] ++ games;
   };
 
-in stdenv.mkDerivation {
-  name = "${name}-${lib.getVersion yquake2}";
+in
+stdenv.mkDerivation {
+  pname = name;
+  version = lib.getVersion yquake2;
 
-  nativeBuildInputs = [ makeWrapper ];
+  nativeBuildInputs = [ makeWrapper copyDesktopItems ];
 
-  buildCommand = ''
+  dontUnpack = true;
+
+  installPhase = ''
+    runHook preInstall
     mkdir -p $out/bin
   '' + lib.concatMapStringsSep "\n" (game: ''
     makeWrapper ${env}/bin/yquake2 $out/bin/yquake2-${game.title} \
       --add-flags "+set game ${game.id}"
     makeWrapper ${env}/bin/yq2ded $out/bin/yq2ded-${game.title} \
       --add-flags "+set game ${game.id}"
-  '') games;
+  '') games + ''
+    install -Dm644 ${yquake2}/share/pixmaps/yamagi-quake2.png $out/share/pixmaps/yamagi-quake2.png;
+    runHook postInstall
+  '';
+
+  desktopItems = map
+    (game: makeDesktopItem ({
+      name = game.id;
+      exec = game.title;
+      icon = "yamagi-quake2";
+      desktopName = game.id;
+      comment = game.description;
+      categories = [ "Game" "Shooter" ];
+    }))
+    games;
 
   meta = {
     inherit description;