yarn: deploy-rs

home-manager/home-yarn.nix

@@ -16,8 +16,81 @@
 
     # https://github.com/NixOS/nixpkgs/pull/339370#issuecomment-2731336341
     bs-manager
+
+    # Steam session scripts
+    (writeShellScriptBin "steam-session" ''
+      #!/usr/bin/env bash
+      set -xeuo pipefail
+
+      gamescopeArgs=(
+          --adaptive-sync  # VRR support
+          --hdr-enabled
+          --mangoapp      # performance overlay
+          --rt
+          --steam
+      )
+
+      steamArgs=(
+          -pipewire-dmabuf
+          -tenfoot
+      )
+
+      mangoConfig=(
+          cpu_temp
+          gpu_temp
+          ram
+          vram
+      )
+
+      mangoVars=(
+          MANGOHUD=1
+          MANGOHUD_CONFIG="$(IFS=,; echo "''${mangoConfig[*]}")"
+      )
+
+      export "''${mangoVars[@]}"
+      exec gamescope "''${gamescopeArgs[@]}" -- steam "''${steamArgs[@]}"
+    '')
+
+    (writeShellScriptBin "steam-session-greetd" ''
+      #!/usr/bin/env bash
+      set -xeuo pipefail
+
+      # Set environment variables for Steam gaming session
+      export STEAM_RUNTIME=1
+      export SDL_VIDEODRIVER=wayland
+      export QT_QPA_PLATFORM=wayland
+      export GDK_BACKEND=wayland
+      export XDG_CURRENT_DESKTOP=Steam
+      export XDG_SESSION_TYPE=wayland
+
+      # Kill any existing compositor
+      pkill niri || true
+
+      # Start Steam in Big Picture mode with gamescope
+      exec steam-session
+    '')
   ];
 
+  # Create desktop entry for Steam session
+  xdg.dataFile."wayland-sessions/steam-session.desktop".text = ''
+    [Desktop Entry]
+    Name=Steam Session
+    Comment=Steam Deck-like gaming session with gamescope
+    Exec=${config.home.homeDirectory}/.nix-profile/bin/steam-session-greetd
+    Type=Application
+    DesktopNames=steam
+  '';
+
+  # Create desktop entry for Niri session
+  xdg.dataFile."wayland-sessions/niri-session.desktop".text = ''
+    [Desktop Entry]
+    Name=Niri Session
+    Comment=Niri Wayland compositor
+    Exec=${config.programs.niri.package}/bin/niri-session
+    Type=Application
+    DesktopNames=niri
+  '';
+
   programs.obs-studio = {
     enable = true;
     plugins = with pkgs.obs-studio-plugins; [