Re: optimize file transfer in pg_upgrade

On Mon, Mar 17, 2025 at 04:04:45PM -0400, Robert Haas wrote:
> On Mon, Mar 17, 2025 at 3:34 PM Nathan Bossart <nathandbossart@gmail.com> wrote:
>> * Once committed, I should update one of my buildfarm animals to use
>>   PG_TEST_PG_UPGRADE_MODE=--swap.
> 
> It would be better if we didn't need a separate buildfarm animal to
> test this, because that means you won't get notified by local testing
> OR by CI if you break this. Can we instead have one test that checks
> this which is part of the normal test run?

That's what I set out to do before I discovered PG_TEST_PG_UPGRADE_MODE.
The commit message for b059a24 seemed to indicate that we don't want to
automatically test all supported modes, but I agree that it would be nice
to have some basic coverage for --swap on CI/buildfarm regardless of
PG_TEST_PG_UPGRADE_MODE.  How about we add a simple TAP test (attached),
and I still plan on switching a buildfarm animal to --swap for more
in-depth testing?

-- 
nathan