#!/usr/bin/env python3


import sys, os
import re


with open("/etc/cgitrc", "r") as file: cgitrc = file.read()


for env_name, env_value in os.environ.items():
    if env_name.startswith('CGIT_'):
        rc_name = env_name[5:].lower().replace('_', '-')
        p = re.compile(r"({0}=)([\w\d]+)".format(rc_name))

        if p.search(cgitrc):
            cgitrc = p.sub(r"\1{0}".format(env_value), cgitrc)
        else:
            cgitrc += ("\n" + "{0}={1}".format(rc_name, env_value) + "\n")


with open("/etc/cgitrc", "w") as file: file.write(cgitrc)