On 19.12.21 00:53, Tom Lane wrote:
> 2. Export the values from pg_regress as environment variables,
> and then add a way for the test scripts to read those variables.
> I was a bit surprised to realize that we didn't have any way
> to do that already --- psql has \setenv, so why did we never
> invent \getenv?
You can do
\set foo `echo $ENVVAR`
but that's probably not portable enough for your purpose.