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https://github.com/NixOS/nixpkgs.git
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systemd-boot-builder.py: add support for profiles (#26318)
* systemd-boot-builder.py: add support for profiles This will also list the generations of other profiles than `system` in the boot menu. See the documentation of the `--profile-name` option of nixos-rebuild for more information on profiles. * Fix errors introduced by previous commit
This commit is contained in:
Kai
Jörg Thalheim
parent
09704d35f2
commit
9929e83607
@ -11,35 +11,42 @@ import errno
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import warnings
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import ctypes
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libc = ctypes.CDLL("libc.so.6")
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import re
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def copy_if_not_exists(source, dest):
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if not os.path.exists(dest):
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shutil.copyfile(source, dest)
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def system_dir(generation):
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return "/nix/var/nix/profiles/system-%d-link" % (generation)
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def system_dir(profile, generation):
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if profile:
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return "/nix/var/nix/profiles/system-profiles/%s-%d-link" % (profile, generation)
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else:
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return "/nix/var/nix/profiles/system-%d-link" % (generation)
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BOOT_ENTRY = """title NixOS
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BOOT_ENTRY = """title NixOS{profile}
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version Generation {generation}
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linux {kernel}
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initrd {initrd}
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options {kernel_params}
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"""
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def write_loader_conf(generation):
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def write_loader_conf(profile, generation):
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with open("@efiSysMountPoint@/loader/loader.conf.tmp", 'w') as f:
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if "@timeout@" != "":
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f.write("timeout @timeout@\n")
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f.write("default nixos-generation-%d\n" % generation)
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if profile:
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f.write("default nixos-%s-generation-%d\n" % (profile, generation))
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else:
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f.write("default nixos-generation-%d\n" % (generation))
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if not @editor@:
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f.write("editor 0");
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os.rename("@efiSysMountPoint@/loader/loader.conf.tmp", "@efiSysMountPoint@/loader/loader.conf")
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def profile_path(generation, name):
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return os.readlink("%s/%s" % (system_dir(generation), name))
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def profile_path(profile, generation, name):
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return os.readlink("%s/%s" % (system_dir(profile, generation), name))
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def copy_from_profile(generation, name, dry_run=False):
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store_file_path = profile_path(generation, name)
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def copy_from_profile(profile, generation, name, dry_run=False):
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store_file_path = profile_path(profile, generation, name)
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suffix = os.path.basename(store_file_path)
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store_dir = os.path.basename(os.path.dirname(store_file_path))
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efi_file_path = "/efi/nixos/%s-%s.efi" % (store_dir, suffix)
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@ -47,22 +54,26 @@ def copy_from_profile(generation, name, dry_run=False):
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copy_if_not_exists(store_file_path, "@efiSysMountPoint@%s" % (efi_file_path))
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return efi_file_path
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def write_entry(generation, machine_id):
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kernel = copy_from_profile(generation, "kernel")
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initrd = copy_from_profile(generation, "initrd")
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def write_entry(profile, generation, machine_id):
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kernel = copy_from_profile(profile, generation, "kernel")
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initrd = copy_from_profile(profile, generation, "initrd")
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try:
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append_initrd_secrets = profile_path(generation, "append-initrd-secrets")
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append_initrd_secrets = profile_path(profile, generation, "append-initrd-secrets")
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subprocess.check_call([append_initrd_secrets, "@efiSysMountPoint@%s" % (initrd)])
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except FileNotFoundError:
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pass
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entry_file = "@efiSysMountPoint@/loader/entries/nixos-generation-%d.conf" % (generation)
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generation_dir = os.readlink(system_dir(generation))
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if profile:
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entry_file = "@efiSysMountPoint@/loader/entries/nixos-%s-generation-%d.conf" % (profile, generation)
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else:
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entry_file = "@efiSysMountPoint@/loader/entries/nixos-generation-%d.conf" % (generation)
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generation_dir = os.readlink(system_dir(profile, generation))
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tmp_path = "%s.tmp" % (entry_file)
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kernel_params = "systemConfig=%s init=%s/init " % (generation_dir, generation_dir)
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with open("%s/kernel-params" % (generation_dir)) as params_file:
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kernel_params = kernel_params + params_file.read()
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with open(tmp_path, 'w') as f:
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f.write(BOOT_ENTRY.format(generation=generation,
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f.write(BOOT_ENTRY.format(profile=" [" + profile + "]" if profile else "",
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generation=generation,
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kernel=kernel,
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initrd=initrd,
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kernel_params=kernel_params))
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@ -77,29 +88,33 @@ def mkdir_p(path):
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if e.errno != errno.EEXIST or not os.path.isdir(path):
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raise
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def get_generations(profile):
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def get_generations(profile=None):
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gen_list = subprocess.check_output([
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"@nix@/bin/nix-env",
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"--list-generations",
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"-p",
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"/nix/var/nix/profiles/%s" % (profile),
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"/nix/var/nix/profiles/%s" % ("system-profiles/" + profile if profile else "system"),
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"--option", "build-users-group", ""],
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universal_newlines=True)
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gen_lines = gen_list.split('\n')
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gen_lines.pop()
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return [ int(line.split()[0]) for line in gen_lines ]
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return [ (profile, int(line.split()[0])) for line in gen_lines ]
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def remove_old_entries(gens):
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slice_start = len("@efiSysMountPoint@/loader/entries/nixos-generation-")
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slice_end = -1 * len(".conf")
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rex_profile = re.compile("^@efiSysMountPoint@/loader/entries/nixos-(.*)-generation-.*\.conf$")
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rex_generation = re.compile("^@efiSysMountPoint@/loader/entries/nixos.*-generation-(.*)\.conf$")
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known_paths = []
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for gen in gens:
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known_paths.append(copy_from_profile(gen, "kernel", True))
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known_paths.append(copy_from_profile(gen, "initrd", True))
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for path in glob.iglob("@efiSysMountPoint@/loader/entries/nixos-generation-[1-9]*.conf"):
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known_paths.append(copy_from_profile(*gen, "kernel", True))
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known_paths.append(copy_from_profile(*gen, "initrd", True))
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for path in glob.iglob("@efiSysMountPoint@/loader/entries/nixos*-generation-[1-9]*.conf"):
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try:
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gen = int(path[slice_start:slice_end])
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if not gen in gens:
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if rex_profile.match(path):
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prof = rex_profile.sub(r"\1", path)
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else:
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prof = "system"
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gen = int(rex_generation.sub(r"\1", path))
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if not (prof, gen) in gens:
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os.unlink(path)
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except ValueError:
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pass
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@ -107,6 +122,14 @@ def remove_old_entries(gens):
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if not path in known_paths:
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os.unlink(path)
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def get_profiles():
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if os.path.isdir("/nix/var/nix/profiles/system-profiles/"):
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return [x
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for x in os.listdir("/nix/var/nix/profiles/system-profiles/")
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if not x.endswith("-link")]
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else:
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return []
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def main():
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parser = argparse.ArgumentParser(description='Update NixOS-related systemd-boot files')
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parser.add_argument('default_config', metavar='DEFAULT-CONFIG', help='The default NixOS config to boot')
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@ -141,12 +164,14 @@ def main():
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mkdir_p("@efiSysMountPoint@/efi/nixos")
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mkdir_p("@efiSysMountPoint@/loader/entries")
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gens = get_generations("system")
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gens = get_generations()
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for profile in get_profiles():
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gens += get_generations(profile)
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remove_old_entries(gens)
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for gen in gens:
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write_entry(gen, machine_id)
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if os.readlink(system_dir(gen)) == args.default_config:
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write_loader_conf(gen)
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write_entry(*gen, machine_id)
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if os.readlink(system_dir(*gen)) == args.default_config:
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write_loader_conf(*gen)
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# Since fat32 provides little recovery facilities after a crash,
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# it can leave the system in an unbootable state, when a crash/outage
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