Clean up pytest session completely after creating per-test 'environment' folders.

gistfile1.txt

import os, shutil
from pathlib import Path
import pytest

@pytest.fixture(scope='session', autouse=True)
def session(tmp_path_factory):
    try:
        yield
    finally:
        shutil.rmtree(str(tmp_path_factory.getbasetemp()))


@pytest.fixture
def environment(tmp_path):
    try:
        old_path = Path.cwd()
        os.chdir(tmp_path)
        # dirs_exist_ok requires Python 3.8.
        shutil.copytree(HERE / 'environment', '.', dirs_exist_ok=True)
        yield tmp_path
    finally:
        os.chdir(old_path)