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 <20230609190936.30045-1-sj@kernel.org>
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From:   David Gow <davidgow@google.com>
Date:   Sat, 10 Jun 2023 12:15:55 +0800
Message-ID: <CABVgOS=wR0J9X1VaU4eOOb_VZRLV0nmj860B1pyq97EvCnbe2Q@mail.gmail.com>
Subject: Re: [PATCH] kunit: tool: undo type subscripts for subprocess.Popen
To:     SeongJae Park <sj@kernel.org>
Cc:     Daniel Latypov <dlatypov@google.com>, brendanhiggins@google.com,
        rmoar@google.com, linux-kernel@vger.kernel.org,
        kunit-dev@googlegroups.com, linux-kselftest@vger.kernel.org,
        skhan@linuxfoundation.org, johannes@sipsolutions.net
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On Sat, 10 Jun 2023 at 03:09, SeongJae Park <sj@kernel.org> wrote:
>
> Hi David and Brendan,
>
> On Tue, 2 May 2023 08:04:20 +0800 David Gow <davidgow@google.com> wrote:
>
> > [-- Attachment #1: Type: text/plain, Size: 1473 bytes --]
> >
> > On Tue, 2 May 2023 at 02:16, 'Daniel Latypov' via KUnit Development
> > <kunit-dev@googlegroups.com> wrote:
> > >
> > > Writing `subprocess.Popen[str]` requires python 3.9+.
> > > kunit.py has an assertion that the python version is 3.7+, so we should
> > > try to stay backwards compatible.
> > >
> > > This conflicts a bit with commit 1da2e6220e11 ("kunit: tool: fix
> > > pre-existing `mypy --strict` errors and update run_checks.py"), since
> > > mypy complains like so
> > > > kunit_kernel.py:95: error: Missing type parameters for generic type "Popen"  [type-arg]
> > >
> > > Note: `mypy --strict --python-version 3.7` does not work.
> > >
> > > We could annotate each file with comments like
> > >   `# mypy: disable-error-code="type-arg"
> > > but then we might still get nudged to break back-compat in other files.
> > >
> > > This patch adds a `mypy.ini` file since it seems like the only way to
> > > disable specific error codes for all our files.
> > >
> > > Note: run_checks.py doesn't need to specify `--config_file mypy.ini`,
> > > but I think being explicit is better, particularly since most kernel
> > > devs won't be familiar with how mypy works.
> > >
> > > Fixes: 695e26030858 ("kunit: tool: add subscripts for type annotations where appropriate")
> > > Reported-by: SeongJae Park <sj@kernel.org>
> > > Link: https://lore.kernel.org/linux-kselftest/20230501171520.138753-1-sj@kernel.org
> > > Signed-off-by: Daniel Latypov <dlatypov@google.com>
> > > ---
> >
> > Thanks for jumping on this.
> >
> > Looks good to me!
> >
> > Reviewed-by: David Gow <davidgow@google.com>
>
> Looks like this patch is still not merged in the mainline.  May I ask the ETA,
> or any concern if you have?
>
>

We've got this queued for 6.5 in the kselftest/kunit tree[1], so it
should land during the merge window. But I'll look into getting it
applied as a fix for 6.4, beforehand.

-- David

[1]: https://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest.git/commit/?h=kunit&id=e30f65c4b3d671115bf2a9d9ef142285387f2aff

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