Use packaging instead of distutils for Version

[FrancescoCasalegno]

Fixes #2928.

Context

setuptools has deprecated the usage of distutils Version classes since version 60.3.0. See pypa/setuptools@1701579 for details.

As a consequence, a warning is raised any time we try, e.g., to do from docker import from_env. Notice that this warning can be fatal if the user has set a warning filter to error mode, which is not too uncommon when running unit tests in CI.

Proposed solution

1. Replace occurrences of distutils.Version (and its subclasses) with packaging.Version.
2. Add packaging to the install_requires.

[FrancescoCasalegno]

@aiordache @ulyssessouza this PR has been open for 2 days but the CI tests is still on hold, because it needs your approval before being run.

Could you please give your green light to run the CI workflow (and also provide some feedback on this PR, when you have time)?

[marco-m-pix4d]

Hello @aiordache @ureyes84 any chance you could have a look at the request by @FrancescoCasalegno above? Thanks!

[cristianmtr]

Any update on this? We use the docker package quite a bit and this warning is polluting our logs

[florian-hoenicke]

I use import warnings and warnings.filterwarnings("ignore", category=DeprecationWarning) as a workaround but it would be better if it could be fixed here.

[zanieb]

For others that are encountering this, you can do a temporary ignore as follows:

import warnings
import docker


def get_docker_client():
    with warnings.catch_warnings():
        # Silence warnings due to use of deprecated methods within dockerpy
        # See https://github.com/docker/docker-py/pull/2931
        warnings.filterwarnings(
            "ignore",
            message="distutils Version classes are deprecated.*",
            category=DeprecationWarning,
        )

        return docker.from_env()

[liadmord]

Seems like the maintainers have gone AWOL, maybe someone should fork this repo?

[marco-m-pix4d]

Thanks @milas !