115 lines
4.2 KiB
Python
115 lines
4.2 KiB
Python
import functools
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from pathlib import Path
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import shlex
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import textwrap
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import tomllib
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from typing import Any, cast, TYPE_CHECKING
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from beartype import beartype
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from test_driver.machine import Machine
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from test_driver.errors import RequestedAssertionFailed
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if TYPE_CHECKING:
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global machine
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machine = cast(Machine, ...)
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assert machine.shell is not None
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ls = "eza -lah --color=always --group-directories-first"
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indent = functools.partial(textwrap.indent, prefix=' ')
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@beartype
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def run_log(machine: Machine, *commands: str, timeout: int | None = 60) -> str:
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output = ""
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for command in commands:
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with machine.nested(f"must succeed: {command}"):
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(status, out) = machine.execute(f"{command} | tee /dev/stderr", timeout=timeout)
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if status != 0:
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machine.log(f"output: {out}")
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raise RequestedAssertionFailed(
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f"command `{command}` failed (exit code {status})",
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)
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output += out
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return output
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@beartype
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def get_config_file() -> dict[str, Any]:
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machine.wait_for_unit("harmonia.service")
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pid = int(machine.get_unit_property("harmonia.service", "MainPID"))
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env_lines: list[str] = machine.succeed(f"cat /proc/{pid}/environ").replace("\0", "\n").splitlines()
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pairs: list[list[str]] = [line.split("=", maxsplit=1) for line in env_lines]
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env = dict(pairs)
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config_file = Path(env["CONFIG_FILE"])
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machine.log(f"copying from VM: {config_file=}")
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machine.copy_from_vm(config_file.as_posix())
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config_file_path = machine.out_dir / config_file.name
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with open(config_file_path, "rb") as f:
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config_data = tomllib.load(f)
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config_file_path.unlink()
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return config_data
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@beartype
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def dynix_append(option: str, value: Any):
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machine.succeed(f'''
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dynix append {shlex.quote(option)} {shlex.quote(str(value))}
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'''.strip())
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@beartype
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def do_apply():
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expr = textwrap.dedent("""
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(import <nixpkgs/nixos> { }).config.dynamicism.applyDynamicConfiguration { }
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""").strip()
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machine.succeed(rf"""
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nix run --show-trace --log-format raw-with-logs --impure -E {shlex.quote(expr)}
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""".strip())
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machine.wait_for_unit("default.target")
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machine.wait_for_unit("install-dynix.service")
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dynix_out = machine.succeed("dynix --version")
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assert "dynix" in dynix_out, f"dynix not in {dynix_out=}"
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# Config should have our initial values.
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config_toml = get_config_file()
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assert int(config_toml['workers']) == 4, f"{config_toml['workers']=} != 4"
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assert int(config_toml['max_connection_rate']) == 256, f"{config_toml['max_connection_rate']=} != 256"
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with machine.nested("must succeed: initial nixos-rebuild switch"):
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machine.succeed("env PAGER= nixos-rebuild switch --log-format raw-with-logs --fallback")
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# Config should not have changed.
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config_toml = get_config_file()
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assert int(config_toml['workers']) == 4, f"{config_toml['workers']=} != 4"
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assert int(config_toml['max_connection_rate']) == 256, f"{config_toml['max_connection_rate']=} != 256"
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new_workers = 20
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dynix_append("services.harmonia.settings.workers", new_workers)
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do_apply()
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# Workers, but not max connection rate, should have changed.
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config_toml = get_config_file()
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assert int(config_toml['workers']) == new_workers, f"{config_toml['workers']=} != {new_workers}"
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assert int(config_toml['max_connection_rate']) == 256, f"{config_toml['max_connection_rate']=} != 256"
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new_max_connection_rate = 100
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dynix_append("services.harmonia.settings.max_connection_rate", new_max_connection_rate)
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do_apply()
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# Max connection rate should have changed, and workers should be the same as before.
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config_toml = get_config_file()
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assert int(config_toml['max_connection_rate']) == new_max_connection_rate, f"{config_toml['max_connection_rate']=} != {new_max_connection_rate}"
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assert int(config_toml['workers']) == new_workers, f"{config_toml['workers']=} != {new_workers}"
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# And this should set everything back.
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machine.succeed("env PAGER= nixos-rebuild switch --log-format raw-with-logs --fallback")
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machine.wait_for_unit("harmonia.service")
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config_toml = get_config_file()
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assert int(config_toml['max_connection_rate']) == 256, f'{config_toml["max_connection_rate"]=} != 256'
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assert int(config_toml['workers']) == 4, f'{config_toml["workers"]=} != 4'
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