Add darwinModules (#71)

README.md

@@ -13,9 +13,9 @@ a library which processes themes created for
 
 ### NixOS
 
-You can install Stylix into your NixOS configuration using
-[Flakes](https://nixos.wiki/wiki/Flakes). This will provide theming for system
-level programs such as bootloaders, splash screens, and display managers.
+You can install Stylix into your NixOS configuration using [Flakes][nix-flakes].
+This will provide theming for system level programs such as bootloaders, splash
+screens, and display managers.
 
 ```nix
 {
@@ -35,8 +35,8 @@ level programs such as bootloaders, splash screens, and display managers.
 <small>Minimal `flake.nix` for a NixOS configuration.</small>
 
 Many applications cannot be configured system wide, so Stylix will also need
-[Home Manager](https://github.com/nix-community/home-manager) to be able to
-change their settings within your home directory.
+[Home Manager][nix-hm] to be able to change their settings within your home
+directory.
 
 [Installing Home Manager as a NixOS module](https://nix-community.github.io/home-manager/index.html#sec-install-nixos-module)
 is highly recommended if you don't use it already. This will combine it with
@@ -49,6 +49,37 @@ its Home Manager modules if it detects that Home Manager is available. You can
 theoretically use it without installing Home Manager, however most features
 will be unavailable.
 
+### nix-darwin
+
+You can install Stylix intor your nix-darwin configuration in a similar fashion
+to NixOS via [Flakes][nix-flakes]. 
+
+```nix
+{
+  inputs = {
+    darwin = {
+      url = "github:LnL7/nix-darwin";
+      inputs.nixpkgs.follows = "nixpkgs";
+    };
+    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
+    stylix.url = "github:danth/stylix";
+  };
+
+  outputs = { darwin, nixpkgs, stylix, ... }: {
+    darwinConfigurations."«hostname»" = darwin.lib.darwinSystem {
+      system = "aarch64-darwin";
+      modules = [ stylix.darwinModules.stylix ./configuration.nix ];
+    };
+  };
+}
+```
+
+While this won't have an effect on the looks of macOS, since we don't have the
+controls to theme it like we do NixOS, it will automatically set up its [Home
+Manager][nix-hm] modules if it detects that Home Manager is available. You can
+theoretically use it without installing Home Manager, however most features will
+be unavailable.
+
 ### Home Manager
 
 If you would prefer to use the standalone version of Home Manager, you can
@@ -297,3 +328,6 @@ The Stylix website has a list of the available targets
 and
 [for Home Manager](https://danth.github.io/stylix/options-hm.html)
 respectively.
+
+[nix-flakes]: https://nixos.wiki/wiki/Flakes
+[nix-hm]: https://github.com/nix-community/home-manager

flake.nix

@@ -34,7 +34,7 @@
       };
 
     in recursiveUpdate docsOutputs {
-      packages = genAttrs [ "aarch64-linux" "i686-linux" "x86_64-linux" ] (
+      packages = genAttrs [ "aarch64-darwin" "aarch64-linux" "i686-linux" "x86_64-darwin" "x86_64-linux" ] (
         system:
         let pkgs = nixpkgs.legacyPackages.${system};
         in {
@@ -60,5 +60,15 @@
           })
         ];
       };
+
+      darwinModules.stylix = { pkgs, ... }@args: {
+        imports = [
+          (import ./stylix/darwin {
+            inherit (self.package.${pkgs.system}) palette-generator;
+            base16 = base16.lib args;
+            homeManagerModule = self.homeManagerModules.stylix;
+          })
+        ];
+      };
     };
 }

stylix/darwin/default.nix

@@ -0,0 +1,46 @@
+{ palette-generator, base16, homeManagerModule }:
+{ options, config, lib, ... }:
+
+let
+  hm = config.stylix.homeManagerIntegration;
+  autoload = import ../autoload.nix { inherit lib; } "darwin";
+in {
+  imports = [
+    ../pixel.nix
+    ../target.nix
+    ./fonts.nix
+    (import ./palette.nix { inherit palette-generator base16; })
+  ] ++ autoload;
+
+  options.stylix.homeManagerIntegration = {
+    followSystem = lib.mkOption {
+      description = ''
+        When this option is <literal>true</literal>, Home Manager will follow
+        the system theme by default, rather than requiring a theme to be set.
+
+        This will only affect Home Manager configurations which are built
+        within the nix-darwin configuration.
+      '';
+      type = lib.types.bool;
+      default = true;
+    };
+
+    autoImport = lib.mkOption {
+      description = ''
+        Whether to enable Stylix automatically for every user.
+
+        This only applies to users for which Home Manager is set up within the
+        nix-darwin configuration.
+      '';
+      type = lib.types.bool;
+      default = options ? home-manager;
+      defaultText = lib.literalDocBook ''
+        <literal>true</literal> when Home Manager is present.
+      '';
+    };
+  };
+
+  config = lib.mkIf hm.autoImport {
+    home-manager.sharedModules = [ homeManagerModule ];
+  };
+}

stylix/darwin/fonts.nix

@@ -0,0 +1,17 @@
+{ config, ... }:
+
+let
+  cfg = config.stylix.fonts;
+in {
+  imports = [ ../fonts.nix ];
+  config.fonts = {
+    fontDir.enable = true;
+
+    fonts = [
+      cfg.monospace.package
+      cfg.serif.package
+      cfg.sansSerif.package
+      cfg.emoji.package
+    ];
+  };
+}

stylix/darwin/palette.nix

@@ -0,0 +1,34 @@
+args:
+{ config, ... }:
+
+{
+  imports = [ (import ../palette.nix args) ];
+
+  config = {
+    environment.etc = {
+      # Making palette.json part of the system closure will protect it from
+      # garbage collection, so future configurations can be evaluated without
+      # having to generate the palette again. The generator is not kept, only
+      # the palette which came from it, so this uses very little disk space.
+      # The extra indirection should prevent the palette generator from running
+      # when the theme is manually specified. generated.json is necessary in
+      # the presence of overrides.
+      "stylix/generated.json".source = config.lib.stylix.scheme {
+        template = builtins.readFile ../palette.json.mustache;
+        extension = ".json";
+      };
+
+      "stylix/palette.json".source = config.lib.stylix.colors {
+        template = builtins.readFile ../palette.json.mustache;
+        extension = ".json";
+      };
+
+      # We also provide a HTML version which is useful for viewing the colors
+      # during development.
+      "stylix/palette.html".source = config.lib.stylix.colors {
+        template = builtins.readFile ../palette.html.mustache;
+        extension = ".html";
+      };
+    };
+  };
+}