refactor modules

modules/desktop/themes/layan/_derivation.nix

@@ -0,0 +1,52 @@
+{
+  stdenv,
+  lib,
+  fetchFromGitHub,
+  gitUpdater,
+  kdeclarative,
+  libplasma,
+  plasma-workspace,
+}:
+stdenv.mkDerivation {
+  pname = "layan-kde-qt6";
+  version = "2025-02-13";
+  src = fetchFromGitHub {
+    owner = "vinceliuice";
+    repo = "Layan-kde";
+    rev = "ace0b1d93e5f08c650630c146b2d637e1e2e6cd1";
+    hash = "sha256-T69bGjfZeOsJLmOZKps9N2wMv5VKYeo1ipGEsLAS+Sg=";
+  };
+
+  # Propagate sddm theme dependencies to user env otherwise sddm does
+  # not find them. Putting them in buildInputs is not enough.
+  propagatedUserEnvPkgs = [
+    kdeclarative
+    libplasma
+    plasma-workspace
+  ];
+
+  postPatch = ''
+    patchShebangs install.sh
+
+    substituteInPlace install.sh \
+      --replace '$HOME/.local' $out \
+      --replace '$HOME/.config' $out/share
+  '';
+
+  installPhase = ''
+    runHook preInstall
+
+    name= ./install.sh --dest $out/share/themes
+
+    runHook postInstall
+  '';
+
+  passthru.updateScript = gitUpdater {};
+
+  meta = with lib; {
+    description = "Flat Design theme for KDE Plasma desktop";
+    homepage = "https://github.com/vinceliuice/Layan-kde";
+    license = licenses.gpl3Only;
+    platforms = platforms.all;
+  };
+}

modules/desktop/themes/layan/layan-qt6.nix

@@ -0,0 +1,18 @@
+{self, ...}: {
+  flake.homeModules.layan-qt6-overlay = {
+    nixpkgs.overlays = [
+      self.overlays.layan-qt6
+    ];
+  };
+  flake.nixosModules.layan-qt6-overlay = {
+    nixpkgs.overlays = [
+      self.overlays.layan-qt6
+    ];
+  };
+  flake.overlays.layan-qt6 = final: prev: {
+    layan-qt6 = final.kdePackages.callPackage ./_derivation.nix {};
+  };
+  perSystem = {pkgs, ...}: {
+    packages.layan-qt6 = pkgs.callPackage ./_derivation.nix {};
+  };
+}

modules/desktop/themes/layan/layan.nix

@@ -0,0 +1,62 @@
+{self, ...}: {
+  flake.nixosModules.layan = {pkgs, ...}: {
+    imports = [
+      self.nixosModules.unstable-overlay
+      self.nixosModules.layan-qt6-overlay
+    ];
+    environment.systemPackages = [
+      pkgs.layan-qt6
+      pkgs.kdePackages.qtstyleplugin-kvantum
+      pkgs.unstable.layan-cursors
+      pkgs.layan-gtk-theme
+      pkgs.tela-circle-icon-theme
+    ];
+  };
+
+  flake.homeModules.layan = {
+    lib,
+    pkgs,
+    ...
+  }: {
+    imports = [
+      self.homeModules.layan-qt6-overlay
+      self.homeModules.unstable-overlay
+    ];
+    home.packages = [
+      pkgs.layan-qt6
+      pkgs.kdePackages.qtstyleplugin-kvantum
+      pkgs.unstable.layan-cursors
+      pkgs.layan-gtk-theme
+      pkgs.tela-circle-icon-theme
+    ];
+
+    qt.enable = false;
+    qt.style.name = "kvantum";
+    qt.style.package = pkgs.kdePackages.qtstyleplugin-kvantum;
+    qt.platformTheme.name = "gtk";
+    systemd.user.settings.Manager.DefaultEnvironment = lib.mapAttrs (_: lib.mkDefault) {
+      QT_STYLE_OVERRIDE = "kvantum";
+      QT_QPA_PLATFORMTHEME = "gtk";
+    };
+    xdg.configFile."Kvantum/kvantum.kvconfig".text = lib.generators.toINI {} {
+      General.theme = "LayanDark";
+    };
+
+    # add nord like gtk theme
+    gtk = {
+      enable = true;
+      cursorTheme = {
+        package = pkgs.unstable.layan-cursors;
+        name = "Layan-cursors";
+      };
+      theme = {
+        package = pkgs.layan-gtk-theme;
+        name = "Layan-Dark";
+      };
+      iconTheme = {
+        package = pkgs.tela-circle-icon-theme;
+        name = "Tela-circle-dark";
+      };
+    };
+  };
+}