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|
# nixos-config - My current NixOS configuration
#
# Copyright (C) 2025 Benedikt Peetz <benedikt.peetz@b-peetz.de>
# SPDX-License-Identifier: GPL-3.0-or-later
#
# This file is part of my nixos-config.
#
# You should have received a copy of the License along with this program.
# If not, see <https://www.gnu.org/licenses/gpl-3.0.txt>.
{
config,
lib,
pkgs,
modules,
modulesPath,
system,
specialArgs,
...
}: let
cfg = config.soispha.boot;
tailsPrefix = "EFI/tails";
in {
options.soispha.boot = {
enable = lib.mkEnableOption "Bootloader configuration";
enableIsoEntry = lib.mkEnableOption "an tails iso boot entry";
};
imports = [
modules.lanzaboote.nixosModules.lanzaboote
];
config = lib.mkIf cfg.enable {
# This should only be necessary for `lanzaboote`, but that is the current default in
# this module.
soispha.impermanence.directories = [
"/var/lib/sbctl"
"/boot"
];
fileSystems = {
# Emulate XBOOTLDR for lanzaboote (see: https://github.com/nix-community/lanzaboote/issues/173#issuecomment-1532386210)
"/efi/EFI/Linux" = {
device = "/boot/EFI/Linux";
options = ["bind"];
fsType = "btrfs";
};
"/efi/EFI/nixos" = {
device = "/boot/EFI/nixos";
options = ["bind"];
fsType = "btrfs";
};
"/efi/${tailsPrefix}" = lib.mkIf cfg.enableIsoEntry {
device = "/boot/${tailsPrefix}";
options = ["bind"];
fsType = "btrfs";
};
};
boot = {
initrd = {
kernelModules = ["nvme" "btrfs"];
};
kernelPackages = pkgs.linuxPackages_latest;
lanzaboote = {
enable = true;
pkiBundle = "/var/lib/sbctl";
settings = {
# Disable editing the kernel command line (which could allow someone to become root)
editor = false;
default = "@saved";
};
};
loader = {
external = lib.mkIf cfg.enableIsoEntry {
installHook = lib.mkForce (let
lanzabooteCfg = config.boot.lanzaboote;
lanzabooteInstallHook = import "${modulesPath}/../lib/eval-config.nix" {
inherit system specialArgs;
modules = [
modules.lanzaboote.nixosModules.lanzaboote
{
# Copy the relevant config into the eval-module context.
boot = {
inherit (config.boot) kernelPackages;
lanzaboote = {
inherit (lanzabooteCfg) enable pkiBundle;
settings = {
inherit (lanzabooteCfg.settings) editor default;
};
};
loader = {
inherit (config.boot.loader) timeout efi systemd-boot;
};
};
systemd.package = config.systemd.package;
}
];
};
install = pkgs.writeShellScript "wrapped-install-tails-iso-marker" ''
echo "[Wrapped bootloader install] Copying tails iso..."
${copyExtraFiles}
echo "[Wrapped bootloader install] Running original lanzaboote install..."
${lanzabooteInstallHook.config.boot.loader.external.installHook}
'';
copyExtraFiles = let
systemdCfg = config.boot.loader.systemd-boot;
nixosDir = "EFI/nixos";
bootMountPoint = config.boot.loader.efi.efiSysMountPoint;
install = lib.getExe' pkgs.coreutils "install";
inherit (lib) mapAttrsToList;
inherit (lib.strings) escapeShellArg concatStrings;
in
pkgs.writeShellScript "copy-extra-files" ''
${concatStrings (
mapAttrsToList (n: v: ''
${install} -Dp "${v}" "${bootMountPoint}/"${escapeShellArg n}
${install} -D /dev/null "${bootMountPoint}/${nixosDir}/.extra-files/"${escapeShellArg n}
'')
systemdCfg.extraFiles
)}
${concatStrings (
mapAttrsToList (n: v: ''
${install} -Dp "${pkgs.writeText n v}" "${bootMountPoint}/loader/entries/"${escapeShellArg n}
${install} -D /dev/null "${bootMountPoint}/${nixosDir}/.extra-files/loader/entries/"${escapeShellArg n}
'')
systemdCfg.extraEntries
)}
'';
in
install);
};
systemd-boot = lib.mkIf cfg.enableIsoEntry {
# Lanzaboote currently replaces the systemd-boot module.
enable = false;
extraEntries = {
"live.conf" = ''
title Tails Live ISO
linux /${tailsPrefix}/vmlinuz-linux
initrd /${tailsPrefix}/initramfs-linux.img
options img_dev=${config.soispha.disks.disk} img_loop=/${tailsPrefix}/tails.iso copytoram
'';
};
extraFiles = let
iso = import ./tails_iso.nix {inherit pkgs;};
in {
"/${tailsPrefix}/tails.iso" = "${iso}/tails.iso";
"/${tailsPrefix}/vmlinuz-linux" = "${iso}/live/vmlinuz-linux";
"/${tailsPrefix}/initramfs-linux.img" = "${iso}/live/initramfs-linux.img";
};
};
efi = {
canTouchEfiVariables = true;
efiSysMountPoint = "/efi";
};
};
};
};
}
|
