experiment with themes and colors

modules/theme/carbonfiber/default.nix

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+{
+  name = "carbonfiber";
+  colors = {
+    primary = {
+      background = "#282828";
+      foreground = "#d5c4a1";
+    };
+    cursor = {
+      text = "#1d2021";
+      cursor = "#d5c4a1";
+    };
+    normal = {
+      black = "#1d2021";
+      red = "#fb4934";
+      green = "#b8bb26";
+      yellow = "#fabd2f";
+      blue = "#83a598";
+      magenta = "#d3869b";
+      cyan = "#8ec07c";
+      white = "#d5c4a1";
+    };
+    bright = {
+      black = "#665c54";
+      red = "#fe8019";
+      green = "#3c3836";
+      yellow = "#504945";
+      blue = "#bdae93";
+      magenta = "#ebdbb2";
+      cyan = "#d65d0e";
+      white = "#fbf1c7";
+    };
+  };
+  wallpaper = ./carbon-fiber.jpg;
+  opacity = 0.8;
+}

modules/theme/default.nix

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+{ config, lib, gui, ... }:
+
+let
+
+  themes = {
+    "carbonfiber" = ./carbonfiber;
+    "gruvbox" = ./gruvbox;
+    "nord" = ./nord;
+  };
+
+in {
+
+  options.theme = {
+    name = lib.mkOption {
+      type = lib.types.str;
+      default = "";
+      description = "Name of the theme";
+    };
+    colors = lib.mkOption {
+      type = lib.types.attrs;
+      default = { };
+      description = "Set of colors";
+    };
+    wallpaper = lib.mkOption {
+      type = lib.types.path;
+      default = ./.;
+      description = "Path to wallpaper image";
+    };
+    opacity = lib.mkOption {
+      type = lib.types.float;
+      default = 1.0;
+      description = "Opacity of certain windows";
+    };
+  };
+
+  config.theme = (import themes.${gui.theme});
+
+}

modules/theme/gruvbox/default.nix

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+{
+  name = "gruvbox";
+  colors = {
+    primary = {
+      background = "#282828";
+      foreground = "#d5c4a1";
+    };
+    cursor = {
+      text = "#1d2021";
+      cursor = "#d5c4a1";
+    };
+    normal = {
+      black = "#1d2021";
+      red = "#fb4934";
+      green = "#b8bb26";
+      yellow = "#fabd2f";
+      blue = "#83a598";
+      magenta = "#d3869b";
+      cyan = "#8ec07c";
+      white = "#d5c4a1";
+    };
+    bright = {
+      black = "#665c54";
+      red = "#fe8019";
+      green = "#3c3836";
+      yellow = "#504945";
+      blue = "#bdae93";
+      magenta = "#ebdbb2";
+      cyan = "#d65d0e";
+      white = "#fbf1c7";
+    };
+  };
+  wallpaper = ./gray-forest.jpg;
+  opacity = 1.0;
+}