Update fontconfig

hosts/apollo/configuration.nix

@@ -14,6 +14,7 @@ imports = [
   "${(builtins.fetchGit "ssh://git@git.darmstadt.ccc.de/cdark.net/nixdark")}"
  ./hardware-configuration.nix
  ../../system
+ ../../system/modules/fonts.nix
 ];
 
 networking = {

system/modules/fonts.nix

@@ -0,0 +1,62 @@
+{ config, pkgs, lib, ... }:
+
+{
+  fonts = {
+    fontconfig = {
+      enable = true;
+      antialias = true;
+      cache32Bit = true;
+      defaultFonts = {
+        monospace = [ "Source Code Pro For Powerline" "Roboto Mono" "DejaVu Sans Mono" ];
+        sansSerif = [ "Roboto Regular" "DejaVu Sans" ];
+        serif = [ "Roboto Slab Regular" "DejaVu Serif" ];
+      };
+      ultimate = {
+        enable = true;
+        substitutions = "combi";
+      };
+    };
+    enableDefaultFonts = true;
+    enableFontDir = true;
+    fonts = [
+      pkgs.anonymousPro
+      pkgs.arkpandora_ttf
+      pkgs.caladea
+      pkgs.carlito
+      pkgs.comfortaa
+      pkgs.comic-relief
+      pkgs.crimson
+      pkgs.dejavu_fonts
+      pkgs.google-fonts
+      pkgs.inconsolata
+      pkgs.iosevka
+      pkgs.liberationsansnarrow
+      pkgs.liberation_ttf
+      pkgs.libertine
+      pkgs.mononoki
+      pkgs.montserrat
+      pkgs.nerdfonts
+      pkgs.norwester-font
+      pkgs.opensans-ttf
+      pkgs.powerline-fonts
+      pkgs.roboto
+      pkgs.sampradaya
+      pkgs.source-code-pro
+      pkgs.source-sans-pro
+      pkgs.source-serif-pro
+      pkgs.tai-ahom
+      pkgs.tempora_lgc
+      pkgs.terminus_font
+      pkgs.theano
+      pkgs.ubuntu_font_family
+    ];
+  };
+
+
+  # create a cache of the font sources, often slow internet connections make it painful to
+  # re-download them after a few months
+  environment.etc = let
+    # fonts with src attributes
+    font_sources = map (v: v.src) (lib.filter (v: v ? src) config.fonts.fonts);
+  in builtins.listToAttrs (lib.imap0 (n: v: lib.nameValuePair "src-cache/fonts/${toString n}" { source = builtins.toPath v; }) font_sources);
+}