v1: allow upgrading indexlevel=basic to 'medium' or 'full'

For v1 repos, we don't need to write any metadata to Xapian
and changing from 'basic' to 'medium' or 'full' will work.

For v2, the metadata for indexing is stored in msgmap (because
the Xapian databases are partitioned for parallelism), so a
reindex is required.

1 files changed, 3 insertions, 2 deletions

diff --git a/lib/PublicInbox/SearchIdx.pm b/lib/PublicInbox/SearchIdx.pm
index bb60506c..1d259a86 100644
--- a/lib/PublicInbox/SearchIdx.pm
+++ b/lib/PublicInbox/SearchIdx.pm
@@ -27,6 +27,8 @@ use constant {
         DEBUG => !!$ENV{DEBUG},
 };
 
+my $xapianlevels = qr/\A(?:full|medium)\z/;
+
 my %GIT_ESC = (
         a => "\a",
         b => "\b",
@@ -365,7 +367,6 @@ sub add_xapian ($$$$$) {
 sub add_message {
         # mime = Email::MIME object
         my ($self, $mime, $bytes, $num, $oid, $mid0) = @_;
-        my $xapianlevels = qr/\A(?:full|medium)\z/;
         my $mids = mids($mime->header_obj);
         $mid0 = $mids->[0] unless defined $mid0; # v1 compatibility
         unless (defined $num) { # v1
@@ -714,7 +715,7 @@ sub _index_sync {
                         }
                         $dbh->commit;
                 }
-                if ($mkey && $newest) {
+                if ($mkey && $newest && $self->{indexlevel} =~ $xapianlevels) {
                         my $cur = $xdb->get_metadata($mkey);
                         if (need_update($self, $cur, $newest)) {
                                 $xdb->set_metadata($mkey, $newest);