search: improve reindexing behavior

For reindexing, fresh Xapian DBs do not count as a reindex,
allowing users to blindly use --reindex on the first
run on a clean repo.

While we're at it, allow indexing to override HEAD ref for
multi-head git repos.

1 files changed, 2 insertions, 1 deletions

diff --git a/lib/PublicInbox/Import.pm b/lib/PublicInbox/Import.pm
index bb0811a5..b3812a63 100644
--- a/lib/PublicInbox/Import.pm
+++ b/lib/PublicInbox/Import.pm
@@ -237,7 +237,8 @@ sub done {
 
                 eval {
                         require PublicInbox::SearchIdx;
-                        PublicInbox::SearchIdx->new($git_dir, 2)->index_sync;
+                        my $s = PublicInbox::SearchIdx->new($git_dir, 2);
+                        $s->index_sync({ ref => $self->{ref} });
                 };
         }