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nixos/grub: Adds background color and mode options

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The background color option is self-explanatory.

The mode is either `normal` or `stretch`, they are as defined by GRUB,
where normal will put the image in the top-left corner of the menu, and
stretch is the default, where it stretches the image without
consideration for the aspect ratio.

 * https://www.gnu.org/software/grub/manual/grub/grub.html#background_005fimage
This commit is contained in:
Samuel Dionne-Riel 2018-08-28 23:53:10 -04:00
parent bc5b26b4ab
commit e8406f937e
2 changed files with 35 additions and 1 deletions
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27
nixos/modules/system/boot/loader/grub/grub.nix
View File

@ -38,6 +38,8 @@ let
in
pkgs.writeText "grub-config.xml" (builtins.toXML
{ splashImage = f cfg.splashImage;
splashMode = f cfg.splashMode;
backgroundColor = f cfg.backgroundColor;
grub = f grub;
grubTarget = f (grub.grubTarget or "");
shell = "${pkgs.runtimeShell}";
@ -328,6 +330,31 @@ in
'';
};
backgroundColor = mkOption {
type = types.nullOr types.string;
example = "#7EBAE4";
default = null;
description = ''
Background color to be used for GRUB to fill the areas the image isn't filling.
<note><para>
This options has no effect for GRUB 1.
</para></note>
'';
};
splashMode = mkOption {
type = types.enum [ "normal" "stretch" ];
default = "stretch";
description = ''
Whether to stretch the image or show the image in the top-left corner unstretched.
<note><para>
This options has no effect for GRUB 1.
</para></note>
'';
};
font = mkOption {
type = types.nullOr types.path;
default = "${realGrub}/share/grub/unicode.pf2";

9
nixos/modules/system/boot/loader/grub/install-grub.pl
View File

@ -51,6 +51,8 @@ my $extraEntries = get("extraEntries");
my $extraEntriesBeforeNixOS = get("extraEntriesBeforeNixOS") eq "true";
my $extraInitrd = get("extraInitrd");
my $splashImage = get("splashImage");
my $splashMode = get("splashMode");
my $backgroundColor = get("backgroundColor");
my $configurationLimit = int(get("configurationLimit"));
my $copyKernels = get("copyKernels") eq "true";
my $timeout = int(get("timeout"));
@ -307,10 +309,15 @@ else {
if ($suffix eq ".jpg") {
$suffix = ".jpeg";
}
if ($backgroundColor) {
$conf .= "
background_color '$backgroundColor'
";
}
copy $splashImage, "$bootPath/background$suffix" or die "cannot copy $splashImage to $bootPath\n";
$conf .= "
insmod " . substr($suffix, 1) . "
if background_image " . $grubBoot->path . "/background$suffix; then
if background_image --mode '$splashMode' " . $grubBoot->path . "/background$suffix; then
set color_normal=white/black
set color_highlight=black/white
else