Refactor theme management

Signed-off-by: Nikolaos Karaolidis <nick@karaolidis.com>

hosts/common/user/configs/gui/theme/options.nix

@@ -8,25 +8,24 @@
 let
   cfg = config.theme;
 
-  activation = pkgs.writeShellApplication {
+  init = pkgs.writeShellApplication {
     name = "theme-init";
     runtimeInputs = with pkgs; [ matugen ];
-    bashOptions = [
-      "errexit"
-      "pipefail"
-    ];
     text = ''
       matugen image "${cfg.configDir}/wallpaper" \
         --type scheme-${cfg.flavour} \
         --mode "$(cat "${cfg.configDir}/mode")" \
         --contrast ${builtins.toString cfg.contrast}
 
-      [ -z "$DISPLAY" ] && [ -z "$WAYLAND_DISPLAY" ] && exit 0
-
-      ${cfg.extraConfig}
+      ${cfg.initExtraConfig}
     '';
   };
 
+  reload = pkgs.writeShellApplication {
+    name = "theme-reload";
+    text = cfg.reloadExtraConfig;
+  };
+
   theme = pkgs.writeShellApplication {
     name = "theme";
     runtimeInputs = with pkgs; [ coreutils ];
@@ -34,7 +33,8 @@ let
       CONFIG = cfg.configDir;
       DEFAULT_WALLPAPER = cfg.wallpaper;
       DEFAULT_MODE = cfg.mode;
-      ACTIVATION = lib.meta.getExe activation;
+      INIT = lib.meta.getExe init;
+      RELOAD = lib.meta.getExe reload;
     };
     text = builtins.readFile ./theme.sh;
   };
@@ -65,7 +65,13 @@ in
         description = "The package containing the `theme` script";
       };
 
-      extraConfig = mkOption {
+      initExtraConfig = mkOption {
+        type = lines;
+        default = "";
+        description = "Extra configuration lines to add to the theme initialization script.";
+      };
+
+      reloadExtraConfig = mkOption {
         type = lines;
         default = "";
         description = "Extra configuration lines to add to the theme reload script.";
@@ -416,7 +422,8 @@ in
     home = {
       activation.themeInit = inputs.home-manager.lib.hm.dag.entryAfter [
         "writeBoundary"
-      ] "run ${lib.meta.getExe activation}";
+        "dconfSettings"
+      ] "run ${lib.meta.getExe init}";
 
       packages =
         with pkgs;