wehub-resource-sync
72 lines
2.4 KiB
Python
72 lines
2.4 KiB
Python
from __future__ import annotations
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from pathlib import Path
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import os
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import re
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import stat
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from typing import Dict, Iterable
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_LINE_RE = re.compile(r"^\s*([A-Za-z_][A-Za-z0-9_]*)\s*=\s*(.*)\s*$")
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class DotenvHandler:
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def __init__(self, path: str | Path = ".env.local"):
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self.path = Path(path)
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def _quote_if_needed(self, val: str) -> str:
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# keep existing quoting if present; add quotes for spaces/#
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if (val.startswith('"') and val.endswith('"')) or (
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val.startswith("'") and val.endswith("'")
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):
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return val
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return f'"{val}"' if any(c in val for c in " #\t") else val
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def upsert(self, updates: Dict[str, str]) -> None:
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"""
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Idempotently set/replace keys in a dotenv file. Preserves comments/order.
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Creates file if missing. Sets file mode to 0600 when possible.
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"""
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lines = self.path.read_text().splitlines() if self.path.exists() else []
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seen = set()
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# replace existing keys in-place
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for i, line in enumerate(lines):
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m = _LINE_RE.match(line)
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if not m:
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continue
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key = m.group(1)
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if key in updates and key not in seen:
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lines[i] = f"{key}={self._quote_if_needed(updates[key])}"
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seen.add(key)
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# append missing keys at end (after a blank line)
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to_append = []
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for k, v in updates.items():
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if k in seen:
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continue
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to_append.append(f"{k}={self._quote_if_needed(v)}")
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if to_append:
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if lines and lines[-1].strip():
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lines.append("")
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lines.extend(to_append)
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self.path.parent.mkdir(parents=True, exist_ok=True)
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self.path.write_text("\n".join(lines) + ("\n" if lines else ""))
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try:
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self.path.chmod(stat.S_IRUSR | stat.S_IWUSR) # 0600
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except Exception:
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pass
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def unset(self, keys: Iterable[str]) -> None:
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"""Remove keys from dotenv file, but leave comments and other lines untouched."""
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if not self.path.exists():
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return
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lines = self.path.read_text().splitlines()
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out = []
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keys = set(keys)
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for line in lines:
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m = _LINE_RE.match(line)
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if m and m.group(1) in keys:
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continue
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out.append(line)
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self.path.write_text("\n".join(out) + ("\n" if out else ""))
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