Re: [PATCH v2 10/11] pytest: add pytest to the meson build system

[Thomas Huth <thuth@redhat.com>]

On 27/09/2022 23.26, Michael S. Tsirkin wrote:
> On Tue, Sep 06, 2022 at 02:10:56PM +0100, Daniel P. Berrangé wrote:
>> On Tue, Jul 12, 2022 at 12:22:10PM +0530, Ani Sinha wrote:
>>>
>>>
>>> On Mon, 11 Jul 2022, John Snow wrote:
>>>
>>>> On Sun, Jul 10, 2022 at 1:01 PM Ani Sinha <ani@anisinha.ca> wrote:
>>>>>
>>>>> Integrate the pytest framework with the meson build system. This will make meson
>>>>> run all the pytests under the pytest directory.
>>>>>
>>>>> Signed-off-by: Ani Sinha <ani@anisinha.ca>
>>>>> ---
>>>>>   tests/Makefile.include   |  4 +++-
>>>>>   tests/meson.build        |  1 +
>>>>>   tests/pytest/meson.build | 49 ++++++++++++++++++++++++++++++++++++++++
>>>>>   3 files changed, 53 insertions(+), 1 deletion(-)
>>>>>   create mode 100644 tests/pytest/meson.build
>>>>>
>>>>> diff --git a/tests/Makefile.include b/tests/Makefile.include
>>>>> index 3accb83b13..40755a6bd1 100644
>>>>> --- a/tests/Makefile.include
>>>>> +++ b/tests/Makefile.include
>>>>> @@ -3,12 +3,14 @@
>>>>>   .PHONY: check-help
>>>>>   check-help:
>>>>>          @echo "Regression testing targets:"
>>>>> -       @echo " $(MAKE) check                  Run block, qapi-schema, unit, softfloat, qtest and decodetree tests"
>>>>> +       @echo " $(MAKE) check                  Run block, qapi-schema, unit, softfloat, qtest, pytest and decodetree tests"
>>>>
>>>> Does this mean that "make check" *requires* an internet connection?
>>>
>>> No. My test will be skipped if it is unable to download the artifacts it
>>> requires due to lack of Internet connectivity.
>>
>> That's not the only concern, there are also people who have metered
>> internet connections, or whose connections are slow and thus have
>> long download times. Any test that downloads should be opt-in only.
>>
>>
>> With regards,
>> Daniel
> 
> <rant>
> This is why I wanted git submodules. A well understood decentralized
> model. Now we are reinventing them badly.

I don't see much of a difference here with submodules with regards to 
Daniel's concerns: If you clone the QEMU repo with a good internet 
connection, you also don't get the submodules by default. If you then move 
to a bad internet connection or offline and the build system tries to pull 
in the submodule, you've also lost.
OTOH, with downloads, you can also make sure to have all downloads cached 
while you're still on the good internet connection. The cache should 
continue working if you're then moving offline.

> I asked on the maintainers summit what issues people have with
> submodules, no one volunteered any information.

You know my position already 
(https://lore.kernel.org/qemu-devel/d7a7b28f-a665-2567-0fb6-e31e7ecbb5c8@redhat.com/), 
so at least I did not feel the need to repeat that again (and we were pretty 
short in time anyway).

  Thomas