fix(kodi): patch stremio CEF to support HiDPI scaling via env var

The beta.13 clap parser ignores unknown --force-device-scale-factor flags
and CEF Args::new() starts empty, so CLI flags never reach the CEF subprocess.
Patch src/webview/mod.rs to read STREMIO_FORCE_DEVICE_SCALE_FACTOR and pass
it to CEF via append_switch_with_value. Remove failed GTK4/master branch
build attempt (requires GTK 4.22 not yet in nixpkgs).

flake.nix

@@ -82,14 +82,16 @@
             };
           };
           custom = prev.callPackage ./packages { };
+          # Patch stremio-linux-shell to support STREMIO_FORCE_DEVICE_SCALE_FACTOR
+          # env var, which passes --force-device-scale-factor to the CEF subprocess
+          # for HiDPI display scaling control
+          stremio-linux-shell = prev.stremio-linux-shell.overrideAttrs (old: {
+            patches = (old.patches or []) ++ [
+              ./packages/stremio-linux-shell/force-device-scale-factor.patch
+            ];
+          });
           # Compatibility: bitwarden renamed to bitwarden-desktop in unstable
           bitwarden-desktop = prev.bitwarden-desktop or prev.bitwarden;
-          # Override stremio-linux-shell with custom GTK4/master branch version
-          # Use nixpkgs-unstable for Rust 1.92+ support required by master branch
-          stremio-linux-shell = (import inputs.nixpkgs-unstable {
-            system = prev.stdenv.hostPlatform.system;
-            config.allowUnfree = true;
-          }).callPackage ./packages/stremio-linux-shell { };
         });
 
       # Shared home-manager configuration factory
@@ -122,10 +124,6 @@
         (ufinal: uprev: {
           claude-code = uprev.callPackage ./packages/claude-code { };
         })
-        # Override stremio-linux-shell with custom GTK4/master branch version
-        (ofinal: oprev: {
-          stremio-linux-shell = ofinal.custom.stremio-linux-shell;
-        })
       ];
 
       nixosModules = [

packages/default.nix

@@ -11,5 +11,4 @@ rec {
   qmd = pkgs.callPackage ./qmd { };
   openclaw-image = pkgs.callPackage ./openclaw-image { };
   openclaw-runtime-closure = pkgs.callPackage ./openclaw-image/runtime-closure.nix { inherit qmd; };
-  # stremio-linux-shell is defined in flake.nix to use nixpkgs-unstable for Rust 1.92+ support
 }

packages/stremio-linux-shell/Cargo.lock.patch

@@ -1,27 +0,0 @@
-# This file documents the approach taken to build stremio-linux-shell
-# from master branch with a Rust version compatible with nixpkgs nixos-25.11
-
-# Approach: Create a patched version of Cargo.toml with older dependencies
-# that are compatible with Rust 1.91
-
-# The master branch currently (261f46f) requires:
-# - gtk4 0.11.3 (requires Rust 1.92)
-# - libadwaita 0.9.1 (requires Rust 1.92)
-# - webkit6 0.6.1 (requires Rust 1.92)
-
-# We need to pin these to older versions that work with Rust 1.91:
-# - gtk4 0.11.2 (last version before 1.92 requirement)
-# - libadwaita 0.9.0
-# - webkit6 0.6.0
-
-# However, this requires patching Cargo.toml, which is complex.
-# The cleaner solution is to use nixpkgs-unstable which has Rust 1.94+.
-
-# Currently, the flake.nix overlays use nixpkgs-unstable for stremio-linux-shell
-# which should work, but there are native build dependencies that need to be installed.
-
-# Build dependencies needed for native GTK4 build:
-# - pkg-config (for finding libraries)
-# - glib, cairo, pango, gdk-pixbuf (buildInputs)
-# - wrapGAppsHook4 (for GTK4 wrapping)
-# - nodejs (for server.js)

packages/stremio-linux-shell/default.nix

@@ -1,100 +0,0 @@
-{
-  lib,
-  rustPlatform,
-  fetchFromGitHub,
-  pkg-config,
-  wrapGAppsHook4,
-  nodejs,
-  libepoxy,
-  mpv,
-  gtk4,
-  libadwaita,
-  webkitgtk_6_0,
-  atk,
-  glib,
-  cairo,
-  pango,
-  gdk-pixbuf,
-  libsoup_3,
-  libnotify,
-  libsecret,
-}:
-
-let
-  src = fetchFromGitHub {
-    owner = "Stremio";
-    repo = "stremio-linux-shell";
-    rev = "261f46fdf155c9352bd1b2a8ce1ee232b36c9286";
-    hash = "sha256-7kfUUjqXIXL1TrSse2AKCjGXHWKcTrDEeXtsFpIiKHc=";
-  };
-in
-rustPlatform.buildRustPackage (finalAttrs: {
-  pname = "stremio-linux-shell";
-  version = "1.0.0-beta.13.master";
-
-  src = src;
-
-  cargoHash = "sha256-yqrPtvF59ii/UTHAcCa9DDqTe6czG722mxzCPB6UoG0=";
-
-  nativeBuildInputs = [
-    pkg-config
-    wrapGAppsHook4
-    nodejs
-  ];
-
-  buildInputs = [
-    libepoxy
-    mpv
-    gtk4
-    libadwaita
-    webkitgtk_6_0
-    atk
-    glib
-    cairo
-    pango
-    gdk-pixbuf
-    libsoup_3
-    libnotify
-    libsecret
-  ];
-
-  env.GETTEXT_DIR = "${src}/po";
-  env.GETTEXT_DOMAIN = "stremio";
-  env.SERVER_PATH = "\${out}/share/stremio/server.js";
-
-  postInstall = ''
-    mkdir -p $out/share/applications
-    cp data/com.stremio.Stremio.desktop $out/share/applications/com.stremio.Stremio.desktop
-
-    mkdir -p $out/share/metainfo
-    cp data/com.stremio.Stremio.metainfo.xml $out/share/metainfo/com.stremio.Stremio.metainfo.xml
-
-    mkdir -p $out/share/dbus-1/services
-    cp data/com.stremio.Stremio.service $out/share/dbus-1/services/com.stremio.Stremio.service
-
-    mkdir -p $out/share/icons/hicolor/128x128/apps
-    cp data/icons/com.stremio.Stremio.svg $out/share/icons/hicolor/128x128/apps/com.stremio.Stremio.svg
-
-    mkdir -p $out/share/stremio
-    cp data/server.js $out/share/stremio/server.js
-
-    mv $out/bin/stremio-linux-shell $out/bin/stremio
-  '';
-
-  meta = {
-    description = "Stremio Linux Shell - Freedom to Stream (GTK4/libadwaita/WebKitGTK master branch)";
-    longDescription = ''
-      Stremio Linux Shell - a modern, GTK4/libadwaita-based media center client.
-      This version uses WebKitGTK instead of CEF/winit from the beta.13 version.
-      
-      Note: This is built from the master branch which is a complete rewrite.
-      Requires Rust 1.92+ to build due to GTK4 0.11.3 dependencies.
-    '';
-    homepage = "https://stremio.com";
-    sourceProvenance = [ lib.sourceTypes.fromSource ];
-    license = lib.licenses.gpl3Only;
-    maintainers = with lib.maintainers; [ ];
-    platforms = [ "x86_64-linux" "aarch64-linux" ];
-    mainProgram = "stremio";
-  };
-})

packages/stremio-linux-shell/force-device-scale-factor.patch

@@ -0,0 +1,20 @@
+--- a/src/webview/mod.rs	2026-05-11 22:00:57.261117297 -0700
++++ b/src/webview/mod.rs	2026-05-11 22:09:44.824475918 -0700
+@@ -56,6 +56,17 @@
+ 
+         let args = Args::new();
+ 
++
++        // Pass --force-device-scale-factor to CEF if the environment variable is set.
++        // This is the standard Chromium flag for HiDPI display scaling.
++        if let Ok(scale) = std::env::var("STREMIO_FORCE_DEVICE_SCALE_FACTOR") {
++            if let Some(cmd) = args.as_cmd_line() {
++                cmd.append_switch_with_value(
++                    Some(&CefString::from("force-device-scale-factor")),
++                    Some(&CefString::from(scale.as_str())),
++                );
++            }
++        }
+         let (sender, receiver) = unbounded::<WebViewEvent>();
+         SENDER.get_or_init(|| sender);
+ 

roles/kodi/default.nix

@@ -22,7 +22,7 @@ in
     stremioScaleFactor = mkOption {
       type = types.nullOr types.float;
       default = null;
-      description = "Scale factor for Stremio UI via GDK_BACKEND=x11 + GDK_SCALE (e.g., 2.0 for 200% scaling). Forces XWayland mode since GTK4 ignores GDK_SCALE on native Wayland.";
+      description = "Scale factor for Stremio UI (e.g., 2.0 for 200% scaling). Sets STREMIO_FORCE_DEVICE_SCALE_FACTOR which passes --force-device-scale-factor to the CEF subprocess via a source patch.";
     };
     appLauncherServer = {
       enable = mkOption {
@@ -70,22 +70,19 @@ in
       }
       else pkgs.qt-pinned.jellyfin-media-player;
 
-    # stremio-linux-shell is a GTK4/libadwaita + WebKitGTK app (not Electron/CEF).
-    # --force-device-scale-factor is a Chromium flag that it ignores entirely.
-    # On Wayland, GTK4 reads scale from the compositor via wp_fractional_scale_v1.
-    # To force a specific scale, we use GDK_BACKEND=x11 + GDK_SCALE which works
-    # reliably under XWayland. On native Wayland, GDK_SCALE is ignored.
-    # Format floats cleanly: 2.0 -> "2", 1.5 -> "1.5"
-    stremioScaleStr = let
-      sf = cfg.stremioScaleFactor;
+    # Format float for env var: 2.0 -> "2", 1.5 -> "1.5"
+    # (Nix's toString 2.0 gives "2.000000" which is unclean)
+    formatScale = sf: let
       intPart = builtins.floor sf;
-      s = builtins.toString sf;
-      m = builtins.match "([0-9]+)\\.([0-9]*[1-9])0*" s;
-      gdkScale = builtins.toString intPart;
     in if sf == intPart then builtins.toString intPart
-       else if m != null then (builtins.elemAt m 0) + "." + (builtins.elemAt m 1)
-       else s;
+       else let s = builtins.toString sf;
+                m = builtins.match "([0-9]+)\\.([0-9]*[1-9])0*" s;
+            in if m != null then (builtins.elemAt m 0) + "." + (builtins.elemAt m 1)
+               else s;
 
+    # stremio-linux-shell is CEF-based. We patch it (via flake overlay) to read
+    # STREMIO_FORCE_DEVICE_SCALE_FACTOR and pass it to CEF as
+    # --force-device-scale-factor, which is the standard Chromium flag for HiDPI.
     stremioPkg =
       if cfg.stremioScaleFactor != null
       then pkgs.symlinkJoin {
@@ -96,15 +93,14 @@ in
           mkdir -p $out/bin
           rm -f $out/bin/stremio
           makeWrapper ${pkgs.stremio-linux-shell}/bin/stremio $out/bin/stremio \
-            --set GDK_BACKEND x11 \
-            --set GDK_SCALE ${builtins.toString (builtins.floor cfg.stremioScaleFactor)}
+            --set STREMIO_FORCE_DEVICE_SCALE_FACTOR ${formatScale cfg.stremioScaleFactor}
 
-          # Update .desktop file to force XWayland + GDK_SCALE for scaling
+          # Update .desktop file to set the env var
           mkdir -p $out/share/applications
           rm -f $out/share/applications/com.stremio.Stremio.desktop
           substitute ${pkgs.stremio-linux-shell}/share/applications/com.stremio.Stremio.desktop \
             $out/share/applications/com.stremio.Stremio.desktop \
-            --replace-fail "Exec=sh -c " "Exec=env GDK_BACKEND=x11 GDK_SCALE=${builtins.toString (builtins.floor cfg.stremioScaleFactor)} sh -c "
+            --replace-fail "Exec=sh -c " "Exec=env STREMIO_FORCE_DEVICE_SCALE_FACTOR=${formatScale cfg.stremioScaleFactor} sh -c "
         '';
       }
       else pkgs.stremio-linux-shell;
@@ -155,9 +151,34 @@ in
       };
 
       services.displayManager = mkIf cfg.autologin {
-        autoLogin.enable = true;
-        autoLogin.user = "kodi";
-        defaultSession = "plasma";
+        autoLogin = {
+          enable = true;
+          user = "kodi";
+        };
+      };
+
+      # Kodi user home manager configuration
+      home-manager.users.kodi = {
+        home.stateVersion = "24.05";
+
+        # Auto-start Kodi in fullscreen after login
+        xsession = mkIf (!cfg.wayland) {
+          windowManager.command = ''
+            ${kodiPkg}/bin/kodi --fullscreen
+          '';
+        };
+
+        # Use a simple .xsession for X11 or a wayland startup script
+        home.file = mkIf cfg.wayland {
+          ".config/autostart/kodi.desktop".text = ''
+            [Desktop Entry]
+            Type=Application
+            Name=Kodi
+            Exec=${kodiPkg}/bin/kodi --fullscreen
+            X-GNOME-Autostart-enabled=true
+            Hidden=false
+          '';
+        };
       };
     };
-}
+}