import os

import pytest


@pytest.fixture(autouse=True)
def clean_env(tmpdir_factory, monkeypatch):
    # avoid that we access / modify the user's normal .config / .cache directory:
    monkeypatch.setenv('XDG_CONFIG_HOME', tmpdir_factory.mktemp('xdg-config-home'))
    monkeypatch.setenv('XDG_CACHE_HOME', tmpdir_factory.mktemp('xdg-cache-home'))
    # also avoid to use anything from the outside environment:
    keys = [key for key in os.environ if key.startswith('BORG_')]
    for key in keys:
        monkeypatch.delenv(key, raising=False)