+ foreach my $m (@try) {
+ # If Xapian can't handle the wildcard since it
+ # has too many results. $@ can be
+ # Search::Xapian::QueryParserError or even:
+ # "something terrible happened at ../Search/Xapian/Enquire.pm"
+ my $mset = eval { $srch->query($m, $opt) } or next;
+ my $mids = $srch->retry_reopen(\&mids_from_mset, $mset);
+ return $mids if scalar(@$mids);
+ }
+}
+
+sub ext_msg_i {
+ my ($other, $arg) = @_;
+ my ($cur, $mid, $ibxs, $found) = @$arg;
+
+ return if $other->{name} eq $cur->{name} || !$other->base_url;
+
+ my $mm = $other->mm or return;
+
+ # try to find the URL with Msgmap to avoid forking
+ my $num = $mm->num_for($mid);
+ if (defined $num) {
+ push @$found, $other;
+ } else {
+ # no point in trying the fork fallback if we
+ # know Xapian is up-to-date but missing the
+ # message in the current repo
+ push @$ibxs, $other;
+ }
+}
+
+sub ext_msg {
+ my ($ctx) = @_;
+ my $cur = $ctx->{-inbox};
+ my $mid = $ctx->{mid};
+
+ eval { require PublicInbox::Msgmap };
+ my $ibxs = [];
+ my $found = [];
+ my $arg = [ $cur, $mid, $ibxs, $found ];
+
+ $ctx->{www}->{pi_config}->each_inbox(\&ext_msg_i, $arg);
+
+ return exact($ctx, $found, $mid) if @$found;
+