theme

modules/home/theme/home-theme-mode-switch.ulu.nix

@@ -0,0 +1,42 @@
+{ ... }:
+{
+  flake.homeModules.home-theme-mode-switch =
+    {
+      config,
+      lib,
+      pkgs,
+      ...
+    }:
+    let
+      variants = "${config.xdg.configHome}/elars-theme";
+      current = "${config.xdg.stateHome}/elars-theme/current";
+
+      switch = pkgs.writeShellScript "elars-theme-mode" ''
+        mode="''${1:-''${NOCTALIA_THEME_MODE:-dark}}"
+        [ "$mode" = light ] || mode=dark
+        ${lib.getExe' pkgs.coreutils "mkdir"} -p "$(${lib.getExe' pkgs.coreutils "dirname"} ${lib.escapeShellArg current})"
+        ${lib.getExe' pkgs.coreutils "ln"} -sfn ${lib.escapeShellArg variants}/"$mode" ${lib.escapeShellArg current}
+      '';
+    in
+    {
+      options.elars.theme.currentVariantDir = lib.mkOption {
+        type = lib.types.str;
+        readOnly = true;
+        default = current;
+        description = ''
+          Directory holding the active variant's files; point configs here
+          instead of at a fixed dark/light file.
+        '';
+      };
+
+      config = {
+        programs.noctalia.settings.hooks.theme_mode_changed = "${switch}";
+
+        home.activation.elarsThemeMode = lib.hm.dag.entryAfter [ "writeBoundary" ] ''
+          if [ ! -e ${lib.escapeShellArg current} ]; then
+            run ${switch} ${config.programs.noctalia.settings.theme.mode or "dark"}
+          fi
+        '';
+      };
+    };
+}