Merge pull request #102 from peel/f-fonts-module

initialise fonts module

README.md

@@ -131,6 +131,7 @@ Whether to activate system at boot time.
 ## Modules
 
 - [`environment`](https://github.com/LnL7/nix-darwin/blob/master/modules/environment)
+- [`fonts`](https://github.com/LnL7/nix-darwin/blob/master/modules/fonts)
 - [`launchd.daemons`](https://github.com/LnL7/nix-darwin/blob/master/modules/launchd/launchd.nix)
 - [`launchd.envVariables`](https://github.com/LnL7/nix-darwin/blob/master/modules/launchd)
 - [`launchd.user.agents`](https://github.com/LnL7/nix-darwin/blob/master/modules/launchd/launchd.nix)

default.nix

@@ -43,6 +43,7 @@ let
         ./modules/nix/nix-info.nix
         ./modules/nix/nixpkgs.nix
         ./modules/environment
+        ./modules/fonts
         ./modules/launchd
         ./modules/services/activate-system
         ./modules/services/buildkite-agent.nix

modules/fonts/default.nix

@@ -0,0 +1,57 @@
+{ config, lib, pkgs, ... }:
+
+with lib;
+with builtins;
+
+let
+  cfg = config.fonts;
+  readDirsRec = path: let
+    home = readDir path;
+    list = mapAttrsToList (name: type:
+      let newPath = "${path}/${name}";
+      in if (type == "directory" || type == "symlink") && !(isFont name) then readDirsRec newPath else [ newPath ]) home;
+    in flatten list;
+  isFont = name: let
+    fontExt = [ ".ttf" ".otf" ];
+    hasExt = exts: name: foldl' (acc: ext: (hasSuffix ext name) || acc) false exts;
+    in hasExt fontExt name;
+  fontFiles = dir: filter isFont (readDirsRec dir);
+  libraryLink = font: "ln -fn '/run/current-system/sw/share/fonts/${baseNameOf font}' '/Library/Fonts/${baseNameOf font}'";
+  outLink = font: "ln -sfn -t $out/share/fonts/ '${font}'";
+  fontLinks = link: dir: concatMapStringsSep "\n" link (fontFiles dir);
+  systemFontsDir = pkgs.runCommand "systemFontsDir" {} ''
+    mkdir -p "$out/share/fonts"
+    echo ${toString config.fonts.fonts}
+    ${concatMapStringsSep "\n" (fontLinks outLink) config.fonts.fonts}
+  '';
+in {
+  options = {
+    fonts = {
+      enableFontDir = mkOption {
+        default = false;
+        description = ''
+          Whether to enable font directory management and link all fonts in <filename>/run/current-system/sw/share/fonts</filename>.
+          Important: removes all manually-added fonts.
+        '';
+      };
+      fonts = mkOption {
+        type = types.listOf types.path;
+        default = [];
+        example = literalExample "[ pkgs.dejavu_fonts ]";
+        description = "List of primary font paths.";
+      };
+    };
+  };
+  
+  config = {
+    system.activationScripts.fonts.text = "" + optionalString cfg.enableFontDir ''
+      # Set up fonts.
+      echo "resetting fonts..." >&2
+      fontrestore default -n 2>&1 | grep -o '/Library/Fonts/.*' | tr '\n' '\0' | xargs -0 rm || true
+      echo "updating fonts..." >&2
+      ${fontLinks libraryLink systemFontsDir}
+    '';
+    environment.systemPackages = [ systemFontsDir ];
+    environment.pathsToLink = [ "/share/fonts" ];
+  };
+}

modules/system/activation-scripts.nix

@@ -64,6 +64,7 @@ in
       ${cfg.activationScripts.time.text}
       ${cfg.activationScripts.networking.text}
       ${cfg.activationScripts.keyboard.text}
+      ${cfg.activationScripts.fonts.text}
 
       ${cfg.activationScripts.postActivation.text}
 

release.nix

@@ -114,6 +114,7 @@ let
     tests.system-path-fish = makeTest ./tests/system-path-fish.nix;
     tests.system-shells = makeTest ./tests/system-shells.nix;
     tests.users-groups = makeTest ./tests/users-groups.nix;
+    tests.fonts = makeTest ./tests/fonts.nix;
 
   }
   // (mapTestOn (packagePlatforms packageSet));

tests/fonts.nix

@@ -0,0 +1,17 @@
+{ config, pkgs, ... }:
+
+let
+  fonts = pkgs.runCommand "fonts-0.0.0" {} "mkdir -p $out";
+in {
+  fonts = {
+    enableFontDir = true;
+    fonts = [ pkgs.dejavu_fonts ];
+  };
+ 
+  test = ''
+    echo checking installed fonts >&2
+    grep -o "fontrestore default -n" ${config.out}/activate
+    grep -o "ln -fn '/run/current-system/sw/share/fonts/DejaVuSans.ttf' '/Library/Fonts/DejaVuSans.ttf'" ${config.out}/activate
+  '';
+}
+