nixpkgs/nixos/modules/config/fonts/fonts.nix
pennae 2e751c0772 treewide: automatically md-convert option descriptions
the conversion procedure is simple:

 - find all things that look like options, ie calls to either `mkOption`
   or `lib.mkOption` that take an attrset. remember the attrset as the
   option
 - for all options, find a `description` attribute who's value is not a
   call to `mdDoc` or `lib.mdDoc`
 - textually convert the entire value of the attribute to MD with a few
   simple regexes (the set from mdize-module.sh)
 - if the change produced a change in the manual output, discard
 - if the change kept the manual unchanged, add some text to the
   description to make sure we've actually found an option. if the
   manual changes this time, keep the converted description

this procedure converts 80% of nixos options to markdown. around 2000
options remain to be inspected, but most of those fail the "does not
change the manual output check": currently the MD conversion process
does not faithfully convert docbook tags like <code> and <package>, so
any option using such tags will not be converted at all.
2022-07-30 15:16:34 +02:00

82 lines
2.2 KiB
Nix

{ config, lib, pkgs, ... }:
with lib;
let
# A scalable variant of the X11 "core" cursor
#
# If not running a fancy desktop environment, the cursor is likely set to
# the default `cursor.pcf` bitmap font. This is 17px wide, so it's very
# small and almost invisible on 4K displays.
fontcursormisc_hidpi = pkgs.xorg.fontxfree86type1.overrideAttrs (old:
let
# The scaling constant is 230/96: the scalable `left_ptr` glyph at
# about 23 points is rendered as 17px, on a 96dpi display.
# Note: the XLFD font size is in decipoints.
size = 2.39583 * config.services.xserver.dpi;
sizeString = builtins.head (builtins.split "\\." (toString size));
in
{
postInstall = ''
alias='cursor -xfree86-cursor-medium-r-normal--0-${sizeString}-0-0-p-0-adobe-fontspecific'
echo "$alias" > $out/lib/X11/fonts/Type1/fonts.alias
'';
});
hasHidpi =
config.hardware.video.hidpi.enable &&
config.services.xserver.dpi != null;
defaultFonts =
[ pkgs.dejavu_fonts
pkgs.freefont_ttf
pkgs.gyre-fonts # TrueType substitutes for standard PostScript fonts
pkgs.liberation_ttf
pkgs.unifont
pkgs.noto-fonts-emoji
];
defaultXFonts =
[ (if hasHidpi then fontcursormisc_hidpi else pkgs.xorg.fontcursormisc)
pkgs.xorg.fontmiscmisc
];
in
{
imports = [
(mkRemovedOptionModule [ "fonts" "enableCoreFonts" ] "Use fonts.fonts = [ pkgs.corefonts ]; instead.")
];
options = {
fonts = {
# TODO: find another name for it.
fonts = mkOption {
type = types.listOf types.path;
default = [];
example = literalExpression "[ pkgs.dejavu_fonts ]";
description = lib.mdDoc "List of primary font paths.";
};
enableDefaultFonts = mkOption {
type = types.bool;
default = false;
description = lib.mdDoc ''
Enable a basic set of fonts providing several font styles
and families and reasonable coverage of Unicode.
'';
};
};
};
config = mkMerge [
{ fonts.fonts = mkIf config.fonts.enableDefaultFonts defaultFonts; }
{ fonts.fonts = mkIf config.services.xserver.enable defaultXFonts; }
];
}