nixpkgs/nixos/modules/config/no-x-libs.nix
Thomas Tuegel 1df1305a8a Rewrite Fontconfig NixOS module
Details:
* The option `fonts.enableFontConfig` has (finally) been renamed
  `fonts.fontconfig.enable`.
* Configurations are loaded in this order: first the Fontconfig-upstream
  configuration is loaded, then the NixOS-specific font directories are
  set, the system-wide default configuration is loaded, and finally the
  user configuration is loaded (if enabled).
* The NixOS options `fonts.fontconfig.defaultFonts.monospace`,
  `fonts.fontconfig.defaultFonts.sansSerif` and
  `fonts.fontconfig.defaultFonts.serif` are added to allow setting the
  default system-wide font used for these generic faces. The defaults
  are the appropriate faces from the DejaVu collection because of their
  comprehensive Unicode coverage, clean rendering, and excellent
  legibility.
* The NixOS option `fonts.fontconfig.antialias` can be used to disable
  antialiasing (it is enabled by default).
* The options `fonts.fontconfig.subpixel.rgba` and
  `fonts.fontconfig.subpixel.lcdfilter` control the system-wide default
  settings for subpixel order and LCD filtering algorithm,
  respectively.
* `fonts.fontconfig.hinting.enable` can be used to disable TrueType font
  hinting (it is enabled by default).
  `fonts.fontconfig.hinting.autohint` controls the FreeType autohinter.
  `fonts.fontconfig.hinting.style` controls the hint style; it is "full"
  by default.
* User configurations can be disabled system-wide by setting
  `fonts.fontconfig.includeUserConf = false`. They are enabled by
  default so users can set Fontconfig options in the desktop environment
  of their choice.
2014-12-08 10:55:23 -06:00

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# This module gets rid of all dependencies on X11 client libraries
# (including fontconfig).
{ config, lib, pkgs, ... }:
with lib;
{
options = {
environment.noXlibs = mkOption {
type = types.bool;
default = false;
description = ''
Switch off the options in the default configuration that
require X11 libraries. This includes client-side font
configuration and SSH forwarding of X11 authentication
in. Thus, you probably do not want to enable this option if
you want to run X11 programs on this machine via SSH.
'';
};
};
config = mkIf config.environment.noXlibs {
programs.ssh.setXAuthLocation = false;
security.pam.services.su.forwardXAuth = lib.mkForce false;
fonts.fontconfig.enable = false;
nixpkgs.config.packageOverrides = pkgs:
{ dbus = pkgs.dbus.override { useX11 = false; }; };
};
}