+foreach my $ibx (@inboxes) {
+ my $lvl = $ibx->{indexlevel};
+ if (defined $lvl) {
+ PublicInbox::Admin::indexlevel_ok_or_die($lvl);
+ next;
+ }
+
+ # Undefined indexlevel, so `full'...
+ # Search::Xapian exists and the DB can be read, at least, fine
+ $ibx->search and next;
+
+ # it's possible for a Xapian directory to exist, but Search::Xapian
+ # to go missing/broken. Make sure it's purged in that case:
+ $ibx->over or die "no over.sqlite3 in $ibx->{mainrepo}\n";
+
+ # $ibx->{search} is populated by $ibx->over call
+ my $xdir_ro = $ibx->{search}->xdir(1);
+ my $npart = 0;
+ foreach my $part (<$xdir_ro/*>) {
+ if (-d $part && $part =~ m!/\d+\z!) {
+ my $bytes = 0;
+ $bytes += -s $_ foreach glob("$part/*");
+ $npart++ if $bytes;
+ }
+ }
+ if ($npart) {
+ PublicInbox::Admin::require_or_die('-search');
+ } else {
+ # somebody could "rm -r" all the Xapian directories;
+ # let them purge the overview, at least
+ $ibx->{indexlevel} ||= 'basic';
+ }
+}
+