add gameaudio module: run-on-gameaudio wrapper in PATH

config/hosts/aspects/doloro-desktop/home.nix

@@ -13,6 +13,7 @@
       modules.sops
       modules.flatpaks
       modules.gamemode
+      modules.gameaudio
       modules.hyprland
       modules.fish
       modules.tuigreet

config/modules/gameaudio.nix

@@ -0,0 +1,27 @@
+{
+  modules,
+  ...
+}:
+{
+  modules.gameaudio = {
+    homeManager =
+      {
+        pkgs,
+        ...
+      }:
+      {
+        home.packages = [
+          # Launch a program with all of its audio routed to GameAudioSink.
+          # Usage: run-on-gameaudio <command> [args...]
+          (pkgs.writeShellScriptBin "run-on-gameaudio" ''
+            if [ "$#" -eq 0 ]; then
+              echo "usage: run-on-gameaudio <command> [args...]" >&2
+              exit 1
+            fi
+            export PIPEWIRE_PROPS="target.object=GameAudioSink"
+            exec "$@"
+          '')
+        ];
+      };
+  };
+}