theme: sync color scheme after matugen finishes

Common/Theme.qml

@@ -441,7 +441,10 @@ Singleton {
         if (savePrefs && typeof SessionData !== "undefined" && !isGreeterMode)
             SessionData.setLightMode(light)
         if (!isGreeterMode) {
-            PortalService.setLightMode(light)
+            // Skip with matugen becuase, our script runner will do it.
+            if (!matugenAvailable) {
+                PortalService.setLightMode(light)
+            }
             generateSystemThemesFromCurrentTheme()
         }
     }
@@ -719,15 +722,16 @@ Singleton {
 
         Quickshell.execDetached(["sh", "-c", `mkdir -p '${stateDir}' && cat > '${desiredPath}' << 'EOF'\n${json}\nEOF`])
         workerRunning = true
+        const syncModeWithPortal = (typeof SettingsData !== "undefined" && SettingsData.syncModeWithPortal) ? "true" : "false"
         if (rawWallpaperPath.startsWith("we:")) {
             console.log("Theme: Starting matugen worker (WE wallpaper)")
             systemThemeGenerator.command = [
                 "sh", "-c",
-                `sleep 1 && ${shellDir}/scripts/matugen-worker.sh '${stateDir}' '${shellDir}' '${configDir}' --run`
+                `sleep 1 && ${shellDir}/scripts/matugen-worker.sh '${stateDir}' '${shellDir}' '${configDir}' '${syncModeWithPortal}' --run`
             ]
         } else {
             console.log("Theme: Starting matugen worker")
-            systemThemeGenerator.command = [shellDir + "/scripts/matugen-worker.sh", stateDir, shellDir, configDir, "--run"]
+            systemThemeGenerator.command = [shellDir + "/scripts/matugen-worker.sh", stateDir, shellDir, configDir, syncModeWithPortal, "--run"]
         }
         systemThemeGenerator.running = true
     }

scripts/matugen-worker.sh

@@ -1,14 +1,15 @@
 #!/usr/bin/env bash
 set -euo pipefail
 
-if [ $# -lt 4 ]; then
-    echo "Usage: $0 STATE_DIR SHELL_DIR CONFIG_DIR --run" >&2
+if [ $# -lt 5 ]; then
+    echo "Usage: $0 STATE_DIR SHELL_DIR CONFIG_DIR SYNC_MODE_WITH_PORTAL --run" >&2
     exit 1
 fi
 
 STATE_DIR="$1"
 SHELL_DIR="$2"
 CONFIG_DIR="$3"
+SYNC_MODE_WITH_PORTAL="$4"
 
 if [ ! -d "$STATE_DIR" ]; then
     echo "Error: STATE_DIR '$STATE_DIR' does not exist" >&2
@@ -25,10 +26,10 @@ if [ ! -d "$CONFIG_DIR" ]; then
     exit 1
 fi
 
-shift 3  # Remove STATE_DIR, SHELL_DIR, and CONFIG_DIR from arguments
+shift 4
 
 if [[ "${1:-}" != "--run" ]]; then
-  echo "usage: $0 STATE_DIR SHELL_DIR CONFIG_DIR --run" >&2
+  echo "usage: $0 STATE_DIR SHELL_DIR CONFIG_DIR SYNC_MODE_WITH_PORTAL --run" >&2
   exit 1
 fi
 
@@ -62,6 +63,27 @@ key_of() {
   echo "${kind}|${value}|${mode}|${icon}|${matugen_type}|${surface_base}|${run_user_templates}" | sha256sum | cut -d' ' -f1
 }
 
+set_system_color_scheme() {
+  local mode="$1"
+
+  if [[ "$SYNC_MODE_WITH_PORTAL" != "true" ]]; then
+    return 0
+  fi
+
+  local target_scheme
+  if [[ "$mode" == "light" ]]; then
+    target_scheme="default"
+  else
+    target_scheme="prefer-dark"
+  fi
+
+  if command -v gsettings >/dev/null 2>&1; then
+    gsettings set org.gnome.desktop.interface color-scheme "$target_scheme" >/dev/null 2>&1 || true
+  elif command -v dconf >/dev/null 2>&1; then
+    dconf write /org/gnome/desktop/interface/color-scheme "'$target_scheme'" >/dev/null 2>&1 || true
+  fi
+}
+
 build_once() {
   local json="$1"
   local kind value mode icon matugen_type surface_base run_user_templates
@@ -237,7 +259,7 @@ EOF
   rm -f "$TMP_CONTENT_CFG"
   popd >/dev/null
 
-  echo "$JSON" | grep -q '"primary"' || { echo "matugen JSON missing primary" >&2; return 2; }
+  echo "$JSON" | grep -q '"primary"' || { echo "matugen JSON missing primary" >&2; set_system_color_scheme "$mode"; return 2; }
   printf "%s" "$JSON" > "$LAST_JSON"
 
   GTK_CSS="$CONFIG_DIR/gtk-3.0/gtk.css"
@@ -289,6 +311,8 @@ EOF
       mv "$TMP" "$CONFIG_DIR/kitty/dank-theme.conf"
     fi
   fi
+
+  set_system_color_scheme "$mode"
 }
 
 if command -v pywalfox >/dev/null 2>&1 && [[ -f "$HOME/.cache/wal/colors.json" ]]; then