feat(theme): use adwaita with gradience for gtk theme

home/theme/default.nix

@@ -0,0 +1,26 @@
+{
+  pkgs,
+  ...
+}: {
+  imports = [
+    ./gtk.nix
+    ./qt.nix
+  ];
+
+  home.pointerCursor = {
+    name = "Dracula-cursors";
+    package = pkgs.dracula-theme;
+    size = 24;
+
+    gtk.enable = true;
+
+    x11 = {
+      enable = true;
+      defaultCursor = "Dracula-cursors";
+    };
+  };
+
+  xresources.extraConfig =
+    builtins.readFile
+    "${pkgs.dracula-theme}/xres";
+}

home/theme/gradience.nix

@@ -0,0 +1,62 @@
+{
+  pkgs,
+  lib,
+  ...
+}: {
+  gradience = rec {
+    # https://github.com/V-Mann-Nick/nix-home-manager/blob/main/gnome/theme.nix
+    package = pkgs.gradience.overrideAttrs (old: {
+      version = "0.8.0-beta1";
+      propagatedBuildInputs = old.propagatedBuildInputs ++ [pkgs.python3Packages.libsass];
+      src = pkgs.fetchgit {
+        url = "https://github.com/GradienceTeam/Gradience.git";
+        rev = "06b83cee3b84916ab9812a47a84a28ca43c8e53f";
+        sha256 = "sha256-gdY5QG0STLHY9bw5vI49rY6oNT8Gg8oxqHeEbqM4XfM=";
+        fetchSubmodules = true;
+      };
+      patches =
+        (old.patches or [])
+        ++ [
+          (pkgs.fetchpatch {
+            url = "https://github.com/V-Mann-Nick/nix-home-manager/raw/e68c661f21bf17323f8f0657f3af06c7f837cc07/gnome/gradience.patch";
+            hash = "sha256-CcOd5KXjSSwYan8MwIJ4SBmmMXriBlOLYk5XFADLf6c=";
+          })
+        ];
+    });
+
+    # Stub the gnome-shell binary to satisfy the check without downloading Gnome
+    gnomeShellStub = pkgs.writeShellScriptBin "gnome-shell" ''
+      echo "GNOME Shell 45.2"
+    '';
+
+    presets = pkgs.fetchFromGitHub {
+      owner = "GradienceTeam";
+      repo = "Community";
+      rev = "b3628d28164d91b3be1cc4736cd77a19c5da4d74";
+      hash = "sha256-tpS6LpPKedPBvI51bD/g299nYM7gY8C1+AmGza1FJ4w=";
+    };
+
+    build = pkgs.stdenv.mkDerivation {
+      name = "gradience-build";
+      preset = lib.fileContents "${presets}/curated/dracula-dark.json";
+      passAsFile = ["preset"];
+      phases = ["buildPhase" "installPhase"];
+      nativeBuildInputs = [gnomeShellStub];
+      buildPhase = ''
+        export HOME=$TMPDIR
+        export XDG_CURRENT_DESKTOP=GNOME
+        mkdir -p $HOME/.config/presets
+        ${package}/bin/gradience-cli apply -p $presetPath --gtk both
+        ${package}/bin/gradience-cli gnome-shell -p $presetPath -v dark
+      '';
+      installPhase = ''
+        mkdir -p $out
+        cp -r .config/gtk-4.0 $out/
+        cp -r .config/gtk-3.0 $out/
+        cp -r .local/share/themes/gradience-shell $out/
+      '';
+    };
+
+    shellTheme = "gradience-shell";
+  };
+}

home/theme/gtk.nix

@@ -0,0 +1,63 @@
+{
+  pkgs,
+  lib,
+  config,
+  ...
+}: let
+  inherit (config.vars) fontSize;
+  inherit (import ./gradience.nix {inherit pkgs lib;}) gradience;
+in {
+  home.packages = with pkgs; [
+    gnomeExtensions.user-themes
+  ];
+
+  # Gtk settings
+  gtk = {
+    enable = true;
+
+    theme = {
+      name = "adw-gtk3";
+      package = pkgs.adw-gtk3;
+    };
+
+    iconTheme = {
+      name = "Flat-Remix-Violet-Dark";
+      package = pkgs.flat-remix-icon-theme;
+    };
+
+    font = {
+      name = "Sans Serif";
+      size = fontSize;
+    };
+
+    gtk3 = {
+      extraConfig = {
+        "gtk-application-prefer-dark-theme" = 1;
+      };
+      extraCss = builtins.readFile "${gradience.build}/gtk-3.0/gtk.css";
+    };
+
+    gtk4 = {
+      extraConfig = {
+        "gtk-application-prefer-dark-theme" = 1;
+      };
+      extraCss = builtins.readFile "${gradience.build}/gtk-4.0/gtk.css";
+    };
+  };
+
+  dconf.settings = {
+    "org/gnome/shell/extensions/user-theme" = {
+      name = gradience.shellTheme;
+    };
+    "org/gnome/shell" = {
+      enabled-extensions = [pkgs.gnomeExtensions.user-themes.extensionUuid];
+    };
+  };
+
+  xdg.dataFile.shellTheme = {
+    enable = true;
+    recursive = true;
+    source = "${gradience.build}/gradience-shell";
+    target = "themes/${gradience.shellTheme}";
+  };
+}

home/theme/qt.nix

@@ -6,50 +6,16 @@
 }: let
   inherit (config.vars) fontSize;
 in {
-  home.pointerCursor = {
-    name = "Dracula-cursors";
-    package = pkgs.dracula-theme;
-    size = 24;
-
-    gtk.enable = true;
-
-    x11 = {
-      enable = true;
-      defaultCursor = "Dracula-cursors";
-    };
-  };
-
-  gtk = {
-    enable = true;
-    theme = {
-      name = "Dracula";
-      package = pkgs.dracula-theme;
-    };
-
-    iconTheme = {
-      name = "Flat-Remix-Violet-Dark";
-      package = pkgs.flat-remix-icon-theme;
-    };
-
-    font = {
-      name = "Sans Serif";
-      size = fontSize;
-    };
-  };
-
   home.packages = with pkgs; [
     libsForQt5.qtstyleplugin-kvantum
     qt6Packages.qtstyleplugin-kvantum
   ];
+
   qt = {
     enable = true;
     platformTheme = "qtct";
   };
 
-  xresources.extraConfig =
-    builtins.readFile
-    "${pkgs.dracula-theme}/xres";
-
   xdg.configFile = let
     floatFont = lib.strings.floatToString fontSize;
     qtconf =

modules/greetd/ags.nix

@@ -17,7 +17,7 @@ in {
     imports = [
       ags.homeManagerModules.default
       ../../common/vars
-      ../../home/theme.nix
+      ../../home/theme
     ];
 
     programs.ags.enable = true;

modules/hyprland/style.nix

@@ -5,7 +5,7 @@
 }: let
   inherit (config.vars) configDir;
 in {
-  imports = [../../home/theme.nix];
+  imports = [../../home/theme];
 
   home.packages = with pkgs; [swww];