add(matugen): auto-theme switch

apps/matugen/config.toml

@@ -55,3 +55,8 @@ post_hook = "makoctl reload"
 input_path = "~/.config/matugen/templates/vicinae"
 output_path = "~/.local/share/vicinae/themes/matugen.toml"
 post_hook = "vicinae theme set matugen"
+
+[templates.theme-switch]
+input_path = "~/.config/matugen/templates/theme-switch"
+output_path = "~/.config/matugen/scripts/theme-switch.sh"
+post_hook = "sh ~/.config/matugen/scripts/theme-switch.sh"

apps/matugen/default.nix

@@ -6,6 +6,7 @@
 }: {
   home.packages = with pkgs; [
     matugen
+    dconf
     psmisc # for killall
   ];
   home.file.".config/matugen/config.toml" = {
@@ -13,6 +14,7 @@
   };
 
   # Copy static templates
+  home.file.".config/matugen/templates/theme-switch".source = ./templates/theme-switch;
   home.file.".config/matugen/templates/cava".source = ./templates/cava;
   home.file.".config/matugen/templates/firefox".source = ./templates/firefox;
   home.file.".config/matugen/templates/ghostty".source = ./templates/ghostty;

apps/matugen/templates/theme-switch

@@ -0,0 +1,11 @@
+#!/bin/sh
+# Generated by Matugen
+
+# mode will be replaced by 'dark' or 'light'
+MODE="{{mode}}"
+
+if [ "$MODE" = "dark" ]; then
+    ${pkgs.dconf}/bin/dconf write /org/gnome/desktop/interface/color-scheme "'prefer-dark'"
+else
+    ${pkgs.dconf}/bin/dconf write /org/gnome/desktop/interface/color-scheme "'prefer-light'"
+fi