25ce047f98
The 4,272-commit upstream merge brought 164 new utf-8 read violations across 96 files. Class-fixed: reads utf-8-sig, writes unchanged. check-windows-footguns.py --all: 164 -> 0.
31 lines
1.1 KiB
Python
31 lines
1.1 KiB
Python
"""Tiny JSON file helpers shared by the bot, process manager, node registry and node server."""
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from __future__ import annotations
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import contextlib
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import json
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from pathlib import Path
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from typing import Any, Optional
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def read_json(path: Path) -> Optional[Any]:
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"""Parsed JSON from *path*, or None when missing/unreadable/malformed."""
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if not path.is_file():
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return None
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try:
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return json.loads(path.read_text(encoding="utf-8-sig"))
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except (OSError, ValueError):
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return None
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def write_json_atomic(path: Path, data: Any, mode: Optional[int] = None) -> None:
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"""Write ``json.dumps(data, indent=2)`` via a ``.json.tmp`` sibling + rename; *mode* (e.g.
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``0o600``) is applied to the temp file so the final file never exists with looser perms."""
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path.parent.mkdir(parents=True, exist_ok=True)
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tmp = path.with_suffix(".json.tmp")
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tmp.write_text(json.dumps(data, indent=2), encoding="utf-8")
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if mode is not None:
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with contextlib.suppress(OSError, NotImplementedError): # best-effort on non-POSIX filesystems
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tmp.chmod(mode)
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tmp.replace(path)
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