File size: 1,339 Bytes
c0e3412 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 | """Simple .env loader without external dependencies.
Reads a `.env` file from the project root and sets process environment
variables. Lines beginning with `#` are treated as comments; blank lines are
ignored. Only KEY=VALUE pairs are supported.
"""
from __future__ import annotations
import os
from pathlib import Path
from typing import Dict
def load_env(filename: str = ".env") -> Dict[str, str]:
"""Load environment variables from a .env-style file.
Returns a mapping of keys loaded. Existing environment variables are not
overwritten.
"""
loaded: Dict[str, str] = {}
root = Path.cwd()
path = root / filename
if not path.exists():
return loaded
try:
for line in path.read_text(encoding="utf-8").splitlines():
line = line.strip()
if not line or line.startswith("#"):
continue
if "=" not in line:
continue
key, value = line.split("=", 1)
key = key.strip()
value = value.strip()
if key and (key not in os.environ):
os.environ[key] = value
loaded[key] = value
except (IOError, UnicodeDecodeError, PermissionError):
# Fail silently to avoid breaking runtime when .env is malformed.
return loaded
return loaded
|