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nixos: Add support for scalable fonts in Grub menus (#26227)

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The default font is unreadably small on some hidpi displays. This
makes it possible to specify a TrueType or OpenType font at any point
size, and it will automatically be converted to the format the Grub
uses.
This commit is contained in:
Benjamin Staffin 2017-06-10 09:53:24 -04:00 • committed by GitHub
parent 1fe951816c
commit 700e22f7bf
2 changed files with 34 additions and 2 deletions
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30
nixos/modules/system/boot/loader/grub/grub.nix
View file

@ -64,11 +64,21 @@ let
)) + ":" + (makeSearchPathOutput "bin" "sbin" [
pkgs.mdadm pkgs.utillinux
]);
font = if lib.last (lib.splitString "." cfg.font) == "pf2"
then cfg.font
else "${convertedFont}";
});
bootDeviceCounters = fold (device: attr: attr // { "${device}" = (attr."${device}" or 0) + 1; }) {}
(concatMap (args: args.devices) cfg.mirroredBoots);
convertedFont = (pkgs.runCommand "grub-font-converted.pf2" {}
(builtins.concatStringsSep " "
([ "${realGrub}/bin/grub-mkfont"
cfg.font
"--output" "$out"
] ++ (optional (cfg.fontSize!=null) "--size ${toString cfg.fontSize}")))
);
in
{
@ -276,7 +286,7 @@ in
extraInitrd = mkOption {
type = types.nullOr types.path;
default = null;
example = "/boot/extra_initrafms.gz";
example = "/boot/extra_initramfs.gz";
description = ''
The path to a second initramfs to be supplied to the kernel.
This ramfs will not be copied to the store, so that it can
@ -305,6 +315,24 @@ in
'';
};
font = mkOption {
type = types.nullOr types.path;
default = "${realGrub}/share/grub/unicode.pf2";
description = ''
Path to a TrueType, OpenType, or pf2 font to be used by Grub.
'';
};
fontSize = mkOption {
type = types.nullOr types.int;
example = literalExample 16;
default = null;
description = ''
Font size for the grub menu. Ignored unless <literal>font</literal>
is set to a ttf or otf font.
'';
};
gfxmodeEfi = mkOption {
default = "auto";
example = "1024x768";