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clan-config: introduce --machine + add tests

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This commit is contained in:
DavHau
2023-08-26 10:32:04 +02:00
parent e73299a306
commit 8ca0a2aee4
6 changed files with 178 additions and 83 deletions
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190
pkgs/clan-cli/clan_cli/config/__init__.py
View File

@@ -5,9 +5,11 @@ import os
import subprocess
import sys
from pathlib import Path
from typing import Any, Optional, Type, Union
from typing import Any, Optional, Type
from clan_cli.dirs import get_clan_flake_toplevel
from clan_cli.errors import ClanError
from clan_cli.nix import nix_eval
script_dir = Path(__file__).parent
@@ -91,16 +93,61 @@ def cast(value: Any, type: Type, opt_description: str) -> Any:
)
def read_option(option: str) -> str:
def options_for_machine(machine_name: str, flake: Optional[Path] = None) -> dict:
if flake is None:
flake = get_clan_flake_toplevel()
# use nix eval to lib.evalModules .#clanModules.machine-{machine_name}
proc = subprocess.run(
nix_eval(
flags=[
"--json",
"--show-trace",
"--impure",
"--expr",
f"""
let
flake = builtins.getFlake (toString {flake});
lib = flake.inputs.nixpkgs.lib;
module = flake.nixosModules.machine-{machine_name};
evaled = lib.evalModules {{
modules = [module];
}};
# this is actually system independent as it uses toFile
docs = flake.inputs.nixpkgs.legacyPackages.x86_64-linux.nixosOptionsDoc {{
inherit (evaled) options;
}};
options = builtins.fromJSON (builtins.readFile docs.optionsJSON.options);
in
options
""",
],
),
capture_output=True,
text=True,
)
if proc.returncode != 0:
print(proc.stderr, file=sys.stderr)
raise Exception(
f"Failed to read options for machine {machine_name}:\n{proc.stderr}"
)
options = json.loads(proc.stdout)
return options
def read_machine_option_value(machine_name: str, option: str) -> str:
# use nix eval to read from .#nixosConfigurations.default.config.{option}
# this will give us the evaluated config with the options attribute
proc = subprocess.run(
[
"nix",
"eval",
"--json",
f".#nixosConfigurations.default.config.{option}",
],
nix_eval(
flags=[
"--json",
"--show-trace",
"--extra-experimental-features",
"nix-command flakes",
f".#nixosConfigurations.{machine_name}.config.{option}",
],
),
capture_output=True,
text=True,
)
@@ -119,18 +166,44 @@ def read_option(option: str) -> str:
return out
def process_args(
def get_or_set_option(args: argparse.Namespace) -> None:
if args.value == []:
print(read_machine_option_value(args.machine, args.option))
else:
# load options
print(args.options_file)
if args.options_file is None:
options = options_for_machine(machine_name=args.machine)
else:
with open(args.options_file) as f:
options = json.load(f)
# compute settings json file location
if args.settings_file is None:
flake = get_clan_flake_toplevel()
settings_file = flake / "machines" / f"{args.machine}.json"
else:
settings_file = args.settings_file
# set the option with the given value
set_option(
option=args.option,
value=args.value,
options=options,
settings_file=settings_file,
option_description=args.option,
)
if not args.quiet:
new_value = read_machine_option_value(args.machine, args.option)
print(f"New Value for {args.option}:")
print(new_value)
def set_option(
option: str,
value: Any,
options: dict,
settings_file: Path,
quiet: bool = False,
option_description: str = "",
) -> None:
if value == []:
print(read_option(option))
return
option_path = option.split(".")
# if the option cannot be found, then likely the type is attrs and we need to
@@ -140,12 +213,11 @@ def process_args(
raise ClanError(f"Option {option_description} not found")
option_parent = option_path[:-1]
attr = option_path[-1]
return process_args(
return set_option(
option=".".join(option_parent),
value={attr: value},
options=options,
settings_file=settings_file,
quiet=quiet,
option_description=option,
)
@@ -170,45 +242,14 @@ def process_args(
current_config = {}
# merge and save the new config file
new_config = merge(current_config, result)
settings_file.parent.mkdir(parents=True, exist_ok=True)
with open(settings_file, "w") as f:
json.dump(new_config, f, indent=2)
if not quiet:
new_value = read_option(option)
print(f"New Value for {option}:")
print(new_value)
def register_parser(
parser: argparse.ArgumentParser,
options_file: Optional[Union[str, Path]] = os.environ.get("CLAN_OPTIONS_FILE"),
) -> None:
if not options_file:
# use nix eval to evaluate .#clanOptions
# this will give us the evaluated config with the options attribute
proc = subprocess.run(
[
"nix",
"eval",
"--raw",
".#clanOptions",
],
check=True,
capture_output=True,
text=True,
)
file = proc.stdout.strip()
with open(file) as f:
options = json.load(f)
else:
with open(options_file) as f:
options = json.load(f)
return _register_parser(parser, options)
# takes a (sub)parser and configures it
def _register_parser(
def register_parser(
parser: Optional[argparse.ArgumentParser],
options: dict[str, Any],
) -> None:
if parser is None:
parser = argparse.ArgumentParser(
@@ -216,31 +257,35 @@ def _register_parser(
)
# inject callback function to process the input later
parser.set_defaults(
func=lambda args: process_args(
option=args.option,
value=args.value,
options=options,
quiet=args.quiet,
settings_file=args.settings_file,
)
)
parser.set_defaults(func=get_or_set_option)
# add --quiet option
# add --machine argument
parser.add_argument(
"--quiet",
"-q",
help="Suppress output",
action="store_true",
"--machine",
"-m",
help="Machine to configure",
type=str,
default="default",
)
# add argument to pass output file
# add --options-file argument
parser.add_argument(
"--options-file",
help="JSON file with options",
type=Path,
)
# add --settings-file argument
parser.add_argument(
"--settings-file",
"-o",
help="Output file",
help="JSON file with settings",
type=Path,
default=Path("clan-settings.json"),
)
# add --quiet argument
parser.add_argument(
"--quiet",
help="Do not print the value",
action="store_true",
)
# add single positional argument for the option (e.g. "foo.bar")
@@ -248,7 +293,6 @@ def _register_parser(
"option",
help="Option to configure",
type=str,
choices=AllContainer(list(options.keys())),
)
# add a single optional argument for the value
@@ -264,14 +308,8 @@ def main(argv: Optional[list[str]] = None) -> None:
if argv is None:
argv = sys.argv
parser = argparse.ArgumentParser()
parser.add_argument(
"schema",
help="The schema to use for the configuration",
type=Path,
)
args = parser.parse_args(argv[1:2])
register_parser(parser, args.schema)
parser.parse_args(argv[2:])
register_parser(parser)
parser.parse_args(argv[1:])
if __name__ == "__main__":

2
pkgs/clan-cli/clan_cli/config/machine.py
View File

@@ -55,7 +55,7 @@ def schema_for_machine(machine_name: str, flake: Optional[Path] = None) -> dict:
let
flake = builtins.getFlake (toString {flake});
lib = import {nixpkgs()}/lib;
module = builtins.trace (builtins.attrNames flake) flake.nixosModules.machine-{machine_name};
module = flake.nixosModules.machine-{machine_name};
evaled = lib.evalModules {{
modules = [module];
}};

26
pkgs/clan-cli/clan_cli/nix.py
View File

@@ -1,8 +1,34 @@
import os
import tempfile
from .dirs import flake_registry, unfree_nixpkgs
def nix_eval(flags: list[str]) -> list[str]:
if os.environ.get("IN_NIX_SANDBOX"):
with tempfile.TemporaryDirectory() as nix_store:
return [
"nix",
"eval",
"--show-trace",
"--extra-experimental-features",
"nix-command flakes",
"--flake-registry",
str(flake_registry()),
# --store is required to prevent this error:
# error: cannot unlink '/nix/store/6xg259477c90a229xwmb53pdfkn6ig3g-default-builder.sh': Operation not permitted
"--store",
nix_store,
] + flags
return [
"nix",
"eval",
"--show-trace",
"--extra-experimental-features",
"nix-command flakes",
] + flags
def nix_shell(packages: list[str], cmd: list[str]) -> list[str]:
# we cannot use nix-shell inside the nix sandbox
# in our tests we just make sure we have all the packages

2
pkgs/clan-cli/default.nix
View File

@@ -77,7 +77,7 @@ python3.pkgs.buildPythonPackage {
];
propagatedBuildInputs = dependencies;
passthru.tests.clan-pytest = runCommand "clan-tests"
passthru.tests.clan-pytest = runCommand "clan-pytest"
{
nativeBuildInputs = [ age zerotierone bubblewrap sops nix openssh rsync stdenv.cc ];
} ''

9
pkgs/clan-cli/tests/machine_flake/flake.nix
View File

@@ -4,7 +4,14 @@
nixpkgs.url = "__NIXPKGS__";
};
outputs = _inputs: {
outputs = inputs: {
nixosModules.machine-machine1 = ./nixosModules/machine1.nix;
nixosConfigurations.machine1 = inputs.nixpkgs.lib.nixosSystem {
modules = [
inputs.self.nixosModules.machine-machine1
(builtins.fromJSON (builtins.readFile ./machines/machine1.json))
{ nixpkgs.hostPlatform = "x86_64-linux"; }
];
};
};
}

32
pkgs/clan-cli/tests/test_config.py
View File

@@ -28,20 +28,44 @@ example_options = f"{Path(config.__file__).parent}/jsonschema/options.json"
def test_set_some_option(
args: list[str],
expected: dict[str, Any],
monkeypatch: pytest.MonkeyPatch,
) -> None:
monkeypatch.setenv("CLAN_OPTIONS_FILE", example_options)
# create temporary file for out_file
with tempfile.NamedTemporaryFile() as out_file:
with open(out_file.name, "w") as f:
json.dump({}, f)
cli = Cli()
cli.run(["config", "--quiet", "--settings-file", out_file.name] + args)
cli.run(
[
"config",
"--quiet",
"--options-file",
example_options,
"--settings-file",
out_file.name,
]
+ args
)
json_out = json.loads(open(out_file.name).read())
assert json_out == expected
def test_configure_machine(
machine_flake: Path,
temporary_dir: Path,
capsys: pytest.CaptureFixture,
monkeypatch: pytest.MonkeyPatch,
) -> None:
monkeypatch.setenv("HOME", str(temporary_dir))
cli = Cli()
cli.run(["config", "-m", "machine1", "clan.jitsi.enable", "true"])
# clear the output buffer
capsys.readouterr()
# read a option value
cli.run(["config", "-m", "machine1", "clan.jitsi.enable"])
# read the output
assert capsys.readouterr().out == "true\n"
def test_walk_jsonschema_all_types() -> None:
schema = dict(
type="object",