Re: Getting rid of regression test input/ and output/ files - Mailing list pgsql-hackers

From Corey Huinker
Subject Re: Getting rid of regression test input/ and output/ files
Date
Msg-id CADkLM=fBFRngYCvs8dwVAmQmUTcSA3NHVOOB0D1BO1mgciYSHA@mail.gmail.com
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In response to Re: Getting rid of regression test input/ and output/ files  (Tom Lane <tgl@sss.pgh.pa.us>)
Responses Re: Getting rid of regression test input/ and output/ files
Re: Getting rid of regression test input/ and output/ files
List pgsql-hackers
On Sun, Dec 19, 2021 at 5:48 PM Tom Lane <tgl@sss.pgh.pa.us> wrote:
Corey Huinker <corey.huinker@gmail.com> writes:
> I have a nitpick about the \getenv FOO FOO lines.
> It's a new function to everyone, and to anyone who hasn't seen the
> documentation it won't be immediately obvious which one is the ENV var and
> which one is the local var. Lowercasing the local var would be a way to
> reinforce which is which to the reader. It would also be consistent with
> var naming in the rest of the script.

Reasonable idea.  Another thing I was wondering about was whether
to attach PG_ prefixes to the environment variable names, since
those are in a more-or-less global namespace.  If we do that,
then a different method for distinguishing the psql variables
is to not prefix them.

+1 to that as well.

Which brings up a tangential question, is there value in having something that brings in one or more env vars as psql vars directly. I'm thinking something like:

\importenv pattern [prefix]

(alternate names: \getenv_multi \getenv_pattern, \getenvs, etc)

which could be used like

\importenv PG* env_

which would import PGFOO and PGBAR as env_PGFOO and env_PGBAR, awkward names but leaving no doubt about where a previously unreferenced variable came from.

I don't think we need it for this specific case, but since the subject of env vars has come up I thought I'd throw it out there.
 

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