grub2-themes/flake.nix

165 lines
6.0 KiB
Nix

{
description = "Flake to manage grub2 themes from vinceliuice";
inputs = {
nixpkgs.url = "github:NixOS/nixpkgs/master";
};
outputs = { self, nixpkgs }:
let
system = "x86_64-linux";
pkgs = import nixpkgs {
inherit system;
};
in
with nixpkgs.lib;
rec {
nixosModules.default = { config, ... }:
let
cfg = config.boot.loader.grub2-theme;
splashImage = if cfg.splashImage == null then "" else cfg.splashImage;
hasBootMenuConfig = cfg.bootMenuConfig != null;
hasTerminalConfig = cfg.terminalConfig != null;
resolutions = {
"1080p" = "1920x1080";
"ultrawide" = "2560x1080";
"2k" = "2560x1440";
"4k" = "3840x2160";
"ultrawide2k" = "3440x1440";
};
grub2-theme = pkgs.stdenv.mkDerivation {
name = "grub2-theme";
src = "${self}";
installPhase = ''
mkdir -p $out/grub/themes;
bash ./install.sh \
--generate $out/grub/themes \
--screen ${cfg.screen} \
--theme ${cfg.theme} \
--icon ${cfg.icon};
if [ -n "${splashImage}" ]; then
filename=$(basename -- "${splashImage}")
extension="''${filename##*.}"
rm $out/grub/themes/${cfg.theme}/background.jpg;
cp ${splashImage} $out/grub/themes/${cfg.theme}/background.$extension;
cp ${splashImage} $out/grub/themes/${cfg.theme}/background;
sed -i "s/background.jpg/background.$extension/g" $out/grub/themes/${cfg.theme}/theme.txt;
fi;
if [ ${pkgs.lib.trivial.boolToString cfg.footer} == "false" ]; then
sed -i ':again;$!N;$!b again; s/\+ image {[^}]*}//g' $out/grub/themes/${cfg.theme}/theme.txt;
fi;
if [ ${pkgs.lib.trivial.boolToString hasBootMenuConfig} == "true" ]; then
sed -i ':again;$!N;$!b again; s/\+ boot_menu {[^}]*}//g' $out/grub/themes/${cfg.theme}/theme.txt;
cat << EOF >> $out/grub/themes/${cfg.theme}/theme.txt
+ boot_menu {
${if cfg.bootMenuConfig == null then "" else cfg.bootMenuConfig}
}
EOF
fi;
if [ ${pkgs.lib.trivial.boolToString hasTerminalConfig} == "true" ]; then
sed -i 's/^terminal-.*$//g' $out/grub/themes/${cfg.theme}/theme.txt
cat << EOF >> $out/grub/themes/${cfg.theme}/theme.txt
${if cfg.terminalConfig == null then "" else cfg.terminalConfig}
EOF
fi;
'';
};
resolution = resolutions."${cfg.screen}";
in
rec {
options = {
boot.loader.grub2-theme = {
enable = mkOption {
default = true;
example = true;
type = types.bool;
description = ''
Enable grub2 theming
'';
};
theme = mkOption {
default = "tela";
example = "tela";
type = types.enum [ "tela" "vimix" "stylish" "whitesur" ];
description = ''
The theme to use for grub2.
'';
};
icon = mkOption {
default = "white";
example = "white";
type = types.enum [ "color" "white" "whitesur" ];
description = ''
The icon to use for grub2.
'';
};
screen = mkOption {
default = "1080p";
example = "1080p";
type = types.enum [ "1080p" "2k" "4k" "ultrawide" "ultrawide2k" ];
description = ''
The screen resolution to use for grub2.
'';
};
splashImage = mkOption {
default = null;
example = "/my/path/background.jpg";
type = types.nullOr types.path;
description = ''
The path of the image to use for background (must be jpg or png).
'';
};
bootMenuConfig = mkOption {
default = null;
example = "left = 30%";
type = types.nullOr types.str;
description = ''
Grub theme definition for boot_menu.
Refer to config/theme-*.txt for reference.
'';
};
terminalConfig = mkOption {
default = null;
example = "terminal-font: \"Terminus Regular 18\"";
type = types.nullOr types.str;
description = ''
Replaces grub theme definition for terminial-*.
Refer to config/theme-*.txt for reference.
'';
};
footer = mkOption {
default = true;
example = true;
type = types.bool;
description = ''
Whether to include the image footer.
'';
};
};
};
config = mkIf cfg.enable (mkMerge [{
environment.systemPackages = [
grub2-theme
];
boot.loader.grub =
let
ext = if cfg.splashImage == null then "jpg" else last (splitString "." cfg.splashImage);
in
{
theme = "${grub2-theme}/grub/themes/${cfg.theme}";
splashImage =
"${grub2-theme}/grub/themes/${cfg.theme}/background.${ext}";
gfxmodeEfi = "${resolution},auto";
gfxmodeBios = "${resolution},auto";
extraConfig = ''
insmod gfxterm
insmod png
set icondir=($root)/theme/icons
'';
};
}]);
};
};
}