2024-05-30 17:51:53 +00:00
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import argparse
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import json
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import subprocess
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import threading
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from collections.abc import Callable, Iterable
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from types import ModuleType
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from typing import Any
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2024-05-31 13:21:07 +00:00
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from .cmd import run
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from .nix import nix_eval
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2024-05-30 17:51:53 +00:00
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"""
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This module provides dynamic completions.
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The completions should feel fast.
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We target a maximum of 1second on our average machine.
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"""
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argcomplete: ModuleType | None = None
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try:
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import argcomplete # type: ignore[no-redef]
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except ImportError:
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pass
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2024-05-31 11:06:46 +00:00
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# The default completion timeout for commands
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COMPLETION_TIMEOUT: int = 3
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2024-05-30 17:51:53 +00:00
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def clan_dir(flake: str | None) -> str | None:
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from .dirs import get_clan_flake_toplevel_or_env
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path_result = get_clan_flake_toplevel_or_env()
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return str(path_result) if path_result is not None else None
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def complete_machines(
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prefix: str, parsed_args: argparse.Namespace, **kwargs: Any
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) -> Iterable[str]:
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"""
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Provides completion functionality for machine names configured in the clan.
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"""
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machines: list[str] = []
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def run_cmd() -> None:
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try:
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# In my tests this was consistently faster than:
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# nix eval .#nixosConfigurations --apply builtins.attrNames
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cmd = ["nix", "flake", "show", "--system", "no-eval", "--json"]
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if (clan_dir_result := clan_dir(None)) is not None:
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cmd.append(clan_dir_result)
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result = subprocess.run(
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cmd,
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check=True,
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capture_output=True,
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text=True,
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)
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data = json.loads(result.stdout)
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try:
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machines.extend(data.get("nixosConfigurations").keys())
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except KeyError:
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pass
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except subprocess.CalledProcessError:
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pass
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thread = threading.Thread(target=run_cmd)
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thread.start()
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2024-05-31 11:06:46 +00:00
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thread.join(timeout=COMPLETION_TIMEOUT)
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2024-05-30 17:51:53 +00:00
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if thread.is_alive():
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return iter([])
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machines_dict = {name: "machine" for name in machines}
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return machines_dict
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2024-05-31 13:21:07 +00:00
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def complete_services_for_machine(
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prefix: str, parsed_args: argparse.Namespace, **kwargs: Any
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) -> Iterable[str]:
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"""
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Provides completion functionality for machine facts generation services.
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"""
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services: list[str] = []
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# TODO: consolidate, if multiple machines are used
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machines: list[str] = parsed_args.machines
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def run_cmd() -> None:
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try:
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if (clan_dir_result := clan_dir(None)) is not None:
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flake = clan_dir_result
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else:
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flake = "."
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services_result = json.loads(
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run(
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nix_eval(
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flags=[
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f"{flake}#nixosConfigurations.{machines[0]}.config.clanCore.facts.services",
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"--apply",
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"builtins.attrNames",
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],
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),
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).stdout.strip()
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)
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services.extend(services_result)
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except subprocess.CalledProcessError:
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pass
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thread = threading.Thread(target=run_cmd)
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thread.start()
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thread.join(timeout=COMPLETION_TIMEOUT)
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if thread.is_alive():
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return iter([])
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services_dict = {name: "service" for name in services}
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return services_dict
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2024-06-03 19:47:14 +00:00
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def complete_secrets(
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prefix: str, parsed_args: argparse.Namespace, **kwargs: Any
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) -> Iterable[str]:
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"""
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Provides completion functionality for clan secrets
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"""
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from pathlib import Path
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from .secrets.secrets import ListSecretsOptions, list_secrets
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if (clan_dir_result := clan_dir(None)) is not None:
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flake = clan_dir_result
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else:
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flake = "."
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options = ListSecretsOptions(
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flake=Path(flake),
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pattern=None,
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)
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secrets = list_secrets(options.flake, options.pattern)
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secrets_dict = {name: "secret" for name in secrets}
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return secrets_dict
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2024-05-30 17:51:53 +00:00
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def add_dynamic_completer(
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action: argparse.Action,
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completer: Callable[..., Iterable[str]],
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) -> None:
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"""
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Add a completion function to an argparse action, this will only be added,
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if the argcomplete module is loaded.
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"""
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if argcomplete:
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# mypy doesn't check this correctly, so we ignore it
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action.completer = completer # type: ignore[attr-defined]
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