From 372d07dc292fa71751e6b68a27e4f53085d8e8ec Mon Sep 17 00:00:00 2001 From: Julien Malka Date: Wed, 25 Oct 2023 10:51:44 +0000 Subject: nixos/systemd-boot: conform backend to RFC-0125 Now the builder is using Bootspec documents. --- .../loader/systemd-boot/systemd-boot-builder.py | 99 +++++++++++----------- 1 file changed, 49 insertions(+), 50 deletions(-) (limited to 'nixos/modules/system/boot/loader/systemd-boot') diff --git a/nixos/modules/system/boot/loader/systemd-boot/systemd-boot-builder.py b/nixos/modules/system/boot/loader/systemd-boot/systemd-boot-builder.py index 310584e398bc1..96b42066b2239 100644 --- a/nixos/modules/system/boot/loader/systemd-boot/systemd-boot-builder.py +++ b/nixos/modules/system/boot/loader/systemd-boot/systemd-boot-builder.py @@ -11,7 +11,23 @@ import shutil import subprocess import sys import warnings -from typing import NamedTuple +import json +from typing import NamedTuple, Dict, List +from dataclasses import dataclass + + +@dataclass +class BootSpec: + init: str + initrd: str + initrdSecrets: str + kernel: str + kernelParams: List[str] + label: str + system: str + toplevel: str + specialisations: Dict[str, "BootSpec"] + libc = ctypes.CDLL("libc.so.6") @@ -71,12 +87,20 @@ def write_loader_conf(profile: str | None, generation: int, specialisation: str os.rename("@efiSysMountPoint@/loader/loader.conf.tmp", "@efiSysMountPoint@/loader/loader.conf") -def profile_path(profile: str | None, generation: int, specialisation: str | None, name: str) -> str: - return os.path.realpath("%s/%s" % (system_dir(profile, generation, specialisation), name)) +def get_bootspec(profile: str | None, generation: int) -> BootSpec: + boot_json_path = os.path.realpath("%s/%s" % (system_dir(profile, generation, None), "boot.json")) + boot_json_f = open(boot_json_path, 'r') + bootspec_json = json.load(boot_json_f) + return bootspec_from_json(bootspec_json) +def bootspec_from_json(bootspec_json: Dict) -> BootSpec: + specialisations = bootspec_json['org.nixos.specialisation.v1'] + specialisations = {k: bootspec_from_json(v) for k, v in specialisations.items()} + return BootSpec(**bootspec_json['org.nixos.bootspec.v1'], specialisations=specialisations) -def copy_from_profile(profile: str | None, generation: int, specialisation: str | None, name: str, dry_run: bool = False) -> str: - store_file_path = profile_path(profile, generation, specialisation, name) + +def copy_from_file(file: str, dry_run: bool = False) -> str: + store_file_path = os.path.realpath(file) suffix = os.path.basename(store_file_path) store_dir = os.path.basename(os.path.dirname(store_file_path)) efi_file_path = "/efi/nixos/%s-%s.efi" % (store_dir, suffix) @@ -84,40 +108,19 @@ def copy_from_profile(profile: str | None, generation: int, specialisation: str copy_if_not_exists(store_file_path, "@efiSysMountPoint@%s" % (efi_file_path)) return efi_file_path - -def describe_generation(profile: str | None, generation: int, specialisation: str | None) -> str: - try: - with open(profile_path(profile, generation, specialisation, "nixos-version")) as f: - nixos_version = f.read() - except IOError: - nixos_version = "Unknown" - - kernel_dir = os.path.dirname(profile_path(profile, generation, specialisation, "kernel")) - module_dir = glob.glob("%s/lib/modules/*" % kernel_dir)[0] - kernel_version = os.path.basename(module_dir) - - build_time = int(os.path.getctime(system_dir(profile, generation, specialisation))) - build_date = datetime.datetime.fromtimestamp(build_time).strftime('%F') - - description = "@distroName@ {}, Linux Kernel {}, Built on {}".format( - nixos_version, kernel_version, build_date - ) - - return description - - def write_entry(profile: str | None, generation: int, specialisation: str | None, - machine_id: str, current: bool) -> None: - kernel = copy_from_profile(profile, generation, specialisation, "kernel") - initrd = copy_from_profile(profile, generation, specialisation, "initrd") + machine_id: str, bootspec: BootSpec, current: bool) -> None: + if specialisation: + bootspec = bootspec.specialisations[specialisation] + kernel = copy_from_file(bootspec.kernel) + initrd = copy_from_file(bootspec.initrd) title = "@distroName@{profile}{specialisation}".format( profile=" [" + profile + "]" if profile else "", specialisation=" (%s)" % specialisation if specialisation else "") try: - append_initrd_secrets = profile_path(profile, generation, specialisation, "append-initrd-secrets") - subprocess.check_call([append_initrd_secrets, "@efiSysMountPoint@%s" % (initrd)]) + subprocess.check_call([bootspec.initrdSecrets, "@efiSysMountPoint@%s" % (initrd)]) except FileNotFoundError: pass except subprocess.CalledProcessError: @@ -132,17 +135,19 @@ def write_entry(profile: str | None, generation: int, specialisation: str | None entry_file = "@efiSysMountPoint@/loader/entries/%s" % ( generation_conf_filename(profile, generation, specialisation)) tmp_path = "%s.tmp" % (entry_file) - kernel_params = "init=%s " % profile_path(profile, generation, specialisation, "init") + kernel_params = "init=%s " % bootspec.init + + kernel_params = kernel_params + " ".join(bootspec.kernelParams) + build_time = int(os.path.getctime(system_dir(profile, generation, specialisation))) + build_date = datetime.datetime.fromtimestamp(build_time).strftime('%F') - with open(profile_path(profile, generation, specialisation, "kernel-params")) as params_file: - kernel_params = kernel_params + params_file.read() with open(tmp_path, 'w') as f: f.write(BOOT_ENTRY.format(title=title, generation=generation, kernel=kernel, initrd=initrd, kernel_params=kernel_params, - description=describe_generation(profile, generation, specialisation))) + description=f"{bootspec.label}, built on {build_date}")) if machine_id is not None: f.write("machine-id %s\n" % machine_id) f.flush() @@ -173,21 +178,14 @@ def get_generations(profile: str | None = None) -> list[SystemIdentifier]: return configurations[-configurationLimit:] -def get_specialisations(profile: str | None, generation: int, _: str | None) -> list[SystemIdentifier]: - specialisations_dir = os.path.join( - system_dir(profile, generation, None), "specialisation") - if not os.path.exists(specialisations_dir): - return [] - return [SystemIdentifier(profile, generation, spec) for spec in os.listdir(specialisations_dir)] - - def remove_old_entries(gens: list[SystemIdentifier]) -> None: rex_profile = re.compile(r"^@efiSysMountPoint@/loader/entries/nixos-(.*)-generation-.*\.conf$") rex_generation = re.compile(r"^@efiSysMountPoint@/loader/entries/nixos.*-generation-([0-9]+)(-specialisation-.*)?\.conf$") known_paths = [] for gen in gens: - known_paths.append(copy_from_profile(*gen, "kernel", True)) - known_paths.append(copy_from_profile(*gen, "initrd", True)) + bootspec = get_bootspec(gen.profile, gen.generation) + known_paths.append(copy_from_file(bootspec.kernel, True)) + known_paths.append(copy_from_file(bootspec.initrd, True)) for path in glob.iglob("@efiSysMountPoint@/loader/entries/nixos*-generation-[1-9]*.conf"): if rex_profile.match(path): prof = rex_profile.sub(r"\1", path) @@ -279,10 +277,11 @@ def install_bootloader(args: argparse.Namespace) -> None: remove_old_entries(gens) for gen in gens: try: - is_default = os.path.dirname(profile_path(*gen, "init")) == args.default_config - write_entry(*gen, machine_id, current=is_default) - for specialisation in get_specialisations(*gen): - write_entry(*specialisation, machine_id, current=is_default) + bootspec = get_bootspec(gen.profile, gen.generation) + is_default = os.path.dirname(bootspec.init) == args.default_config + write_entry(*gen, machine_id, bootspec, current=is_default) + for specialisation in bootspec.specialisations.keys(): + write_entry(gen.profile, gen.generation, specialisation, machine_id, bootspec, current=is_default) if is_default: write_loader_conf(*gen) except OSError as e: -- cgit 1.4.1