Re: PG_TEST_EXTRA and meson

Hi,

On Tue, 23 Jul 2024 at 13:40, Ashutosh Bapat
<ashutosh(dot)bapat(dot)oss(at)gmail(dot)com> wrote:
>
> On Tue, Jul 23, 2024 at 4:02 PM Nazir Bilal Yavuz <byavuz81(at)gmail(dot)com> wrote:
> >
> > > I wonder whether we really require pg_test_extra argument to testwrap.
> > > Why can't we use the logic in testwrap, to set run time PG_TEST_EXTRA,
> > > in meson.build directly? I.e. set test_env['PG_TEST_EXTRA'] to
> > > os.environ[;PG_TEST_EXTRA'] if the latter is set, otherwise set the
> > > first to get_option('PG_TEST_EXTRA').
> >
> > When test_env('PG_TEST_EXTRA') is set, it could not be overridden
> > afterwards. Perhaps there is a way to override test_env() but I do not
> > know how.
> >
>
> I am not suggesting to override test_env['PG_TEST_EXTRA'] but set it
> to the value after overriding if required. meson.build file seems to
> allow some conditional variable setting. So I thought this would be
> possible, haven't tried myself though.

Sorry if I caused a misunderstanding. What I meant was, when the
test_env('PG_TEST_EXTRA') is set, Meson will always use PG_TEST_EXTRA
from the setup. So, Meson needs to be built again to change
PG_TEST_EXTRA.

AFAIK Meson does not support accessing environment variables but
run_command() could be used to test this:

-test_env.set('PG_TEST_EXTRA', get_option('PG_TEST_EXTRA'))
+pg_test_extra_env = run_command(
+ [python,
+ '-c',
+ 'import os; print(os.getenv("PG_TEST_EXTRA", ""))'],
+ check: true).stdout()
+
+test_env.set('PG_TEST_EXTRA', pg_test_extra_env != '' ?
+ pg_test_extra_env :
+ get_option('PG_TEST_EXTRA'))
+

--
Regards,
Nazir Bilal Yavuz
Microsoft