lib/types/fontType: Add size attribute (#1848)

* lib/types: Add size attribute to fontType
* tests: Add test for kitty
* modules/types/fontType: Make size nullable
* Add release notes

Co-authored-by: Sebastian Zivota <sebastian.zivota@mailbox.org>

doc/release-notes/rl-2105.adoc

@@ -162,6 +162,16 @@ qt = {
 };
 ----
 
+* The library type `fontType` now has a `size` attribute in addition to `name`. For example:
++
+[source,nix]
+----
+font = {
+  name = "DejaVu Sans";
+  size = 8;
+};
+----
+
 [[sec-release-21.05-state-version-changes]]
 === State Version Changes
 

modules/lib/types.nix

@@ -47,9 +47,18 @@ in rec {
 
       name = mkOption {
         type = types.str;
-        example = "DejaVu Sans 8";
+        example = "DejaVu Sans";
         description = ''
-          The family name and size of the font within the package.
+          The family name of the font within the package.
+        '';
+      };
+
+      size = mkOption {
+        type = types.nullOr types.int;
+        default = null;
+        example = "8";
+        description = ''
+          The size of the font.
         '';
       };
     };

modules/misc/gtk.nix

@@ -128,8 +128,12 @@ in {
   };
 
   config = mkIf cfg.enable (let
-    ini = optionalAttrs (cfg.font != null) { gtk-font-name = cfg.font.name; }
+    ini = optionalAttrs (cfg.font != null) {
-      // optionalAttrs (cfg.theme != null) { gtk-theme-name = cfg.theme.name; }
+      gtk-font-name = let
+        fontSize =
+          optionalString (cfg.font.size != null) " ${toString cfg.font.size}";
+      in "${cfg.font.name}" + fontSize;
+    } // optionalAttrs (cfg.theme != null) { gtk-theme-name = cfg.theme.name; }
       // optionalAttrs (cfg.iconTheme != null) {
         gtk-icon-theme-name = cfg.iconTheme.name;
       };

modules/programs/kitty.nix

@@ -79,7 +79,11 @@ in {
       # Generated by Home Manager.
       # See https://sw.kovidgoyal.net/kitty/conf.html
 
-      ${optionalString (cfg.font != null) "font_family ${cfg.font.name}"}
+      ${optionalString (cfg.font != null) ''
+        font_family ${cfg.font.name}
+        ${optionalString (cfg.font.size != null)
+        "font_size ${toString cfg.font.size}"}
+      ''}
 
       ${toKittyConfig cfg.settings}
 

tests/default.nix

@@ -55,6 +55,7 @@ import nmt {
     ./modules/programs/gpg
     ./modules/programs/i3status
     ./modules/programs/kakoune
+    ./modules/programs/kitty
     ./modules/programs/lf
     ./modules/programs/lieer
     ./modules/programs/man

tests/modules/programs/kitty/default.nix

@@ -0,0 +1 @@
+{ kitty-example-settings = ./example-settings.nix; }

tests/modules/programs/kitty/example-settings-expected.conf

@@ -0,0 +1,17 @@
+# Generated by Home Manager.
+# See https://sw.kovidgoyal.net/kitty/conf.html
+
+font_family DejaVu Sans
+font_size 8
+
+
+enable_audio_bell no
+scrollback_lines 10000
+update_check_interval 0
+
+
+map ctrl+c copy_or_interrupt
+map ctrl+f>2 set_font_size 20
+
+
+

tests/modules/programs/kitty/example-settings.nix

@@ -0,0 +1,32 @@
+{ config, lib, pkgs, ... }:
+
+with lib;
+
+{
+  config = {
+    programs.kitty = {
+      enable = true;
+      package = pkgs.writeScriptBin "dummy-kitty" "";
+      settings = {
+        scrollback_lines = 10000;
+        enable_audio_bell = false;
+        update_check_interval = 0;
+      };
+
+      font.name = "DejaVu Sans";
+      font.size = 8;
+
+      keybindings = {
+        "ctrl+c" = "copy_or_interrupt";
+        "ctrl+f>2" = "set_font_size 20";
+      };
+    };
+
+    nmt.script = ''
+      assertFileExists home-files/.config/kitty/kitty.conf
+      assertFileContent \
+        home-files/.config/kitty/kitty.conf \
+        ${./example-settings-expected.conf}
+    '';
+  };
+}