Robert Haas <robertmhaas(at)gmail(dot)com> writes:
> Oh, well, if we have a working tar available, then it's not so bad. I
> was thinking we couldn't really count on that, especially on Windows.
I think the existing precedent is to skip the test if tar isn't there,
cf pg_basebackup/t/010_pg_basebackup.pl. But certainly the majority of
buildfarm animals have it.
regards, tom lane