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|
{
config,
lib,
pkgs,
...
}:
let
cfg = config.os.core.bootloader;
gpgHome = "/root/.gnupg";
in
{
options.os.core.bootloader = {
type = lib.mkOption {
type = lib.types.enum [
"systemd-boot"
"grub"
"none"
];
default = "systemd-boot";
description = "Which bootloader to use";
};
efi = lib.mkOption {
type = lib.types.bool;
default = if cfg.grub.device == "nodev" then true else false;
description = "Whether the system uses UEFI or Legacy BIOS";
};
timeout = lib.mkOption {
type = lib.types.int;
default = 3;
description = "Boot menu timeout in seconds";
};
grub = {
device = lib.mkOption {
type = lib.types.str;
default = "nodev";
description = "Device to install GRUB to (e.g. /dev/nvme0n1). Use 'nodev' for UEFI.";
};
useOSProber = lib.mkOption {
type = lib.types.bool;
default = false;
description = "Scan for other operating systems";
};
defaultEntry = lib.mkOption {
type = lib.types.int;
default = 0;
description = "Index of the default boot entry";
};
signing = {
enable = lib.mkEnableOption "GPG signing for Libreboot/GRUB";
keyId = lib.mkOption {
type = lib.types.str;
description = "The GPG Key ID used to sign the boot files";
};
};
};
luks.enable = lib.mkEnableOption "LUKS encryption support";
};
config = lib.mkMerge [
# 1. Common Kernel & Initrd Settings
{
boot = {
loader = {
timeout = cfg.timeout;
efi.canTouchEfiVariables = lib.mkDefault cfg.efi;
};
supportedFilesystems = [
"ntfs"
"btrfs"
];
kernelParams = [
"quiet"
"splash"
];
consoleLogLevel = 0;
initrd.availableKernelModules = [
"aesni_intel"
"cryptd"
];
};
systemd.settings.Manager.DefaultTimeoutStopSec = "5s";
}
# 2. Systemd-boot Implementation
(lib.mkIf (cfg.type == "systemd-boot") {
boot.loader.systemd-boot = {
enable = true;
editor = false;
consoleMode = "max";
};
})
# 3. GRUB Implementation
(lib.mkIf (cfg.type == "grub") {
boot.loader.grub = {
enable = true;
device = cfg.grub.device;
efiSupport = cfg.efi;
useOSProber = cfg.grub.useOSProber;
default = cfg.grub.defaultEntry;
enableCryptodisk = cfg.luks.enable;
copyKernels = true;
extraConfig = lib.mkIf cfg.grub.signing.enable ''
set check_signatures=enforce
terminal_input console
terminal_output console
'';
extraInstallCommands = lib.mkIf cfg.grub.signing.enable ''
echo "Signing with keys from ${gpgHome}"
SIGN_CMD="${pkgs.gnupg}/bin/gpg --homedir ${gpgHome} --detach-sign --batch --yes --default-key ${cfg.grub.signing.keyId}"
$SIGN_CMD /boot/grub/grub.cfg
for f in /boot/nixos/*; do
if [[ "$f" != *.sig ]]; then
$SIGN_CMD "$f"
fi
done
'';
};
environment.systemPackages = lib.optional cfg.grub.signing.enable pkgs.gnupg;
})
{
assertions = [
{
assertion = cfg.grub.signing.enable -> cfg.grub.signing.keyId != "";
message = "Bootloader signing is enabled but os.core.bootloader.grub.signing.keyId is not set.";
}
];
}
];
}
|
