#!/usr/bin/env python
import os
import subprocess
import sys
import shlex


def read_env(data):
    return dict(
        item.split(b"=", 1)
        for item in data.split(b"\0")
        if item
    )


def main():
    if len(sys.argv) != 2:
        print(f"Usage: {sys.argv[0]} DIR", file=sys.stderr)
        return 2

    before = {
        os.fsencode(k): os.fsencode(v)
        for k, v in os.environ.items()
    }

    result = subprocess.run(
        ["direnv", "exec", sys.argv[1], "env", "-0"],
        stdout=subprocess.PIPE,
        check=True,
    )

    after = read_env(result.stdout)

        
    for key, value in after.items():
      if before.get(key) != value:
        name = os.fsdecode(key)
        val = os.fsdecode(value)
        print(f"export {name}={shlex.quote(val)}")



if __name__ == "__main__":
    sys.exit(main())