Re: Making background psql nicer to use in tap tests

> On 5 Apr 2023, at 23:44, Daniel Gustafsson <daniel(at)yesql(dot)se> wrote:
>
> Unless there are objections I plan to get this in before the freeze, in order
> to have better interactive tests starting with 16. With a little bit of
> documentation polish I think it's ready.

When looking at the CFBot failure on Linux and Windows (not on macOS) I noticed
that it was down to the instance lacking IO::Pty.

[19:59:12.609](1.606s) ok 1 - scram_iterations in server side ROLE
Can't locate IO/Pty.pm in @INC (you may need to install the IO::Pty module) (@INC contains: /tmp/cirrus-ci-build/src/test/perl /tmp/cirrus-ci-build/src/test/authentication /etc/perl /usr/local/lib/i386-linux-gnu/perl/5.32.1 /usr/local/share/perl/5.32.1 /usr/lib/i386-linux-gnu/perl5/5.32 /usr/share/perl5 /usr/lib/i386-linux-gnu/perl/5.32 /usr/share/perl/5.32 /usr/local/lib/site_perl) at /usr/share/perl5/IPC/Run.pm line 1828.

Skimming the VM creation [0] it seems like it should be though? On macOS the
module is installed inside Cirrus and the test runs fine.

I don't think we should go ahead with a patch that refactors interactive_psql
only to SKIP over it in CI (which is what the tab_completion test does now), so
let's wait until we have that sorted before going ahead.

--
Daniel Gustafsson

[0] https://github.com/anarazel/pg-vm-images/blob/main/scripts/linux_debian_install_deps.sh