77 lines
2.0 KiB
Python
77 lines
2.0 KiB
Python
from dataclasses import dataclass
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from pathlib import Path
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from typing import Self
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import argparse
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import sys
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import json
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@dataclass
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class Config:
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source_lock: Path = Path.home() / ".hive/flake.lock"
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source_nixpkgs: str = "nixpkgs-unstable"
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target_lock: Path = Path.cwd() / "flake.lock"
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dry: bool = False
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@classmethod
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def load(cls, paths: list[Path]) -> Self:
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c = cls()
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args = cls.argparse()
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c.dry = args.dry
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# Target lock can only be set via args
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if args.target_lock:
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c.target_lock = Path(args.target_lock)
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# We do not need to read config files.
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if args.source_lock:
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c.source_lock = Path(args.source_lock)
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return c
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# Check if source_lock is set somewhere
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for p in paths:
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if not p.exists():
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continue
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with p.open(mode="r") as f:
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cfg = json.load(f)
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c.source_lock = Path(cfg["source_lock"])
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c.source_nixpkgs = cfg["source_nixpkgs"]
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break
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return c
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@staticmethod
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def argparse() -> argparse.Namespace:
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args = argparse.ArgumentParser()
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args.add_argument(
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"--source_lock",
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type=Path,
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default=None,
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required=False,
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help="The flake.lock file to read nixpkgs from.",
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)
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args.add_argument(
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"--source_nixpkgs",
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type=Path,
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default=None,
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required=False,
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help="The nixpkgs in flake.lock to use.",
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)
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args.add_argument(
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"--target_lock",
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type=Path,
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default=None,
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required=False,
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help="The flake.lock file to write nixpkgs to. Use CWD/flake.lock if unset",
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)
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args.add_argument(
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"--dry",
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action="store_true",
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help="Only show what would be done.",
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)
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return args.parse_args(sys.argv[1:])
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