WIP: theme gtk apps

hosts/modules/gui/default.nix

@@ -7,6 +7,7 @@ in
 {
   imports = [
     ./gnome.nix
+    ./gtk.nix
     ./phosh.nix
     ./plasma.nix
     ./plasma-mobile.nix

hosts/modules/gui/gtk.nix

@@ -0,0 +1,133 @@
+{ config, lib, pkgs }:
+let
+  cfg = config.sane.gui.gtk;
+  themes = {
+    inherit (pkgs)
+      # themes are in <repo:nixos/nixpkgs:pkgs/data/themes>
+      adapta-gtk-theme
+      adapta-kde-theme
+      adementary-theme
+      adi1090x-plymouth-themes
+      adw-gtk3
+      adwaita-qt
+      adwaita-qt6
+      albatross
+      amarena-theme
+      amber-theme
+      ant-bloody-theme
+      ant-nebula-theme
+      ant-theme
+      arc-kde-theme
+      arc-theme
+      artim-dark
+      ayu-theme-gtk
+      base16-schemes
+      blackbird
+      breath-theme
+      canta-theme
+      catppuccin-gtk
+      catppuccin-kde
+      catppuccin-kvantum
+      catppuccin-plymouth
+      clearlooks-phenix
+      colloid-gtk-theme
+      colloid-kde
+      dracula-theme
+      e17gtk
+      equilux-theme
+      flat-remix-gnome
+      flat-remix-gtk
+      fluent-gtk-theme
+      graphite-gtk-theme
+      graphite-kde-theme
+      greybird
+      gruvbox-dark-gtk
+      gruvbox-gtk-theme
+      gruvterial-theme
+      juno-theme
+      kde-gruvbox
+      kde-rounded-corners
+      layan-gtk-theme
+      layan-kde
+      lightly-boehs
+      lightly-qt
+      lounge-gtk-theme
+      marwaita
+      marwaita-manjaro
+      marwaita-peppermint
+      marwaita-pop_os
+      marwaita-ubuntu
+      matcha-gtk-theme
+      materia-kde-theme
+      materia-theme
+      material-kwin-decoration
+      mojave-gtk-theme
+      nixos-bgrt-plymouth
+      nordic
+      numix-gtk-theme
+      numix-solarized-gtk-theme
+      numix-sx-gtk-theme
+      oceanic-theme
+      omni-gtk-theme
+      onestepback
+      openzone-cursors
+      orchis-theme
+      orion
+      palenight-theme
+      paper-gtk-theme
+      pitch-black
+      plano-theme
+      plasma-overdose-kde-theme
+      plata-theme
+      pop-gtk-theme
+      qogir-kde
+      qogir-theme
+      rose-pine-gtk-theme
+      shades-of-gray-theme
+      sierra-breeze-enhanced
+      sierra-gtk-theme
+      skeu
+      snowblind
+      solarc-gtk-theme
+      spacx-gtk-theme
+      stilo-themes
+      sweet
+      sweet-nova
+      theme-jade1
+      theme-obsidian2
+      theme-vertex
+      tokyo-night-gtk
+      ubuntu-themes
+      venta
+      vimix-gtk-themes
+      whitesur-gtk-theme
+      yaru-remix-theme
+      yaru-theme
+      zuki-themes
+    ;
+  };
+in
+{
+  options = with lib; {
+    sane.gui.gtk.enable = mkOption {
+      default = false;
+      type = types.bool;
+      description = "apply theme to gtk4 apps";
+    };
+  };
+
+  config = lib.mkIf cfg.enable {
+    programs.dconf.packages = [
+      (pkgs.writeTextFile {
+        name = "dconf-sway-settings";
+        destination = "/etc/dconf/db/site.d/10_sway_settings";
+        text = ''
+          [org/gnome/desktop/interface]
+          gtk-theme="Dracula"
+          icon-theme="Dracula"
+        '';
+      })
+    ];
+    environment.systemPackages = lib.attrValues themes;
+  };
+}

hosts/modules/gui/sway/default.nix

@@ -94,6 +94,7 @@ in
 
     (mkIf cfg.enable {
       sane.programs.swayApps.enableFor.user.colin = true;
+      sane.gui.gtk.enable = lib.mkDefault true;
 
       # swap in these lines to use SDDM instead of `services.greetd`.
       # services.xserver.displayManager.sddm.enable = true;