slawek
9f56b3ee19
- Create .gitignore to exclude build artifacts - Add README.md with project description and installation instructions - Implement pyproject.toml for package metadata and script entry points - Add console output helpers for command-line scripts - Implement environment file loading functionality - Add JSON file I/O helpers - Create token decoder CLI for decoding JWT claims - Implement serve-markdown CLI for serving Markdown files as HTML
34 lines
1.3 KiB
Python
34 lines
1.3 KiB
Python
"""Environment file helpers for command-line scripts."""
|
|
|
|
import os
|
|
|
|
from python_helpers.console import fail
|
|
|
|
|
|
def load_env_file(path):
|
|
"""Load a docker-style environment file into the process environment.
|
|
|
|
Blank lines and lines whose first non-blank character is # are ignored; a # anywhere
|
|
else is part of the value. A NAME=VALUE line sets the variable, overriding any value
|
|
already in the environment; a bare NAME line leaves the inherited value in place.
|
|
Values are taken literally, without quote removal or variable interpolation. An empty
|
|
name, or one containing whitespace, is an error.
|
|
|
|
Args:
|
|
path: path to the environment file.
|
|
"""
|
|
try:
|
|
with open(path, encoding="utf-8") as env_file:
|
|
lines = env_file.read().splitlines()
|
|
except OSError as error:
|
|
fail(f"Could not read '{path}': {error}")
|
|
|
|
for number, line in enumerate(lines, start=1):
|
|
if not line.strip() or line.lstrip().startswith("#"):
|
|
continue
|
|
name, separator, value = line.partition("=")
|
|
if not name or any(character.isspace() for character in name):
|
|
fail(f"{path}: line {number}: variable '{name}' is empty or contains whitespace")
|
|
if separator:
|
|
os.environ[name] = value
|