# emacs: -*- mode: python; py-indent-offset: 4; indent-tabs-mode: nil -*-
# vi: set ft=python sts=4 ts=4 sw=4 et:
import os
import shutil
from tempfile import template, mkdtemp


class TemporaryDirectory(object):
    """Create and return a temporary directory.  This has the same
    behavior as mkdtemp but can be used as a context manager.  For
    example:

        with TemporaryDirectory() as tmpdir:
            ...

    Upon exiting the context, the directory and everthing contained
    in it are removed.
    """

    def __init__(self, suffix="", prefix=template, dir=None):
        self.name = mkdtemp(suffix, prefix, dir)
        self._closed = False

    def __enter__(self):
        return self.name

    def cleanup(self):
        if not self._closed:
            shutil.rmtree(self.name)
            self._closed = True

    def __exit__(self, exc, value, tb):
        self.cleanup()
        return False


class InTemporaryDirectory(TemporaryDirectory):
    def __enter__(self):
        self._pwd = os.getcwd()
        os.chdir(self.name)
        return super(InTemporaryDirectory, self).__enter__()

    def __exit__(self, exc, value, tb):
        os.chdir(self._pwd)
        return super(InTemporaryDirectory, self).__exit__(exc, value, tb)


