linux/tools/testing/kunit/mypy.ini
Daniel Latypov e30f65c4b3 kunit: tool: undo type subscripts for subprocess.Popen
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 1da2e6220e ("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: 695e260308 ("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>
Tested-by: SeongJae Park <sj@kernel.org>
Reviewed-by: David Gow <davidgow@google.com>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
2023-05-08 08:39:41 -06:00

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INI

[mypy]
strict = True
# E.g. we can't write subprocess.Popen[str] until Python 3.9+.
# But kunit.py tries to support Python 3.7+, so let's disable it.
disable_error_code = type-arg