lei import: increase flags search batch size, display progress

IMAP flag-only synchronization doesn't fetch entire messages,
so we can safely bump the batch size iff a user specified one
for full messages to 10000 times that.

Since I sometimes wonder why nothing happens for several seconds
after starting "lei import $URL", we'll also show some progress
during the flag synchronization phase.

1 files changed, 2 insertions, 1 deletions

diff --git a/lib/PublicInbox/NetReader.pm b/lib/PublicInbox/NetReader.pm
index 0c2288d8..23445e7a 100644
--- a/lib/PublicInbox/NetReader.pm
+++ b/lib/PublicInbox/NetReader.pm
@@ -462,8 +462,9 @@ sub each_old_flags ($$$$) {
         my ($self, $mic, $uri, $l_uid) = @_;
         $l_uid ||= 1;
         my $sec = uri_section($uri);
-        my $bs = $self->{imap_opt}->{$sec}->{batch_size} // 10000;
+        my $bs = ($self->{imap_opt}->{$sec}->{batch_size} // 1) * 10000;
         my ($eml_cb, @args) = @{$self->{eml_each}};
+        $self->{quiet} or warn "# $uri syncing flags 1:$l_uid\n";
         for (my $n = 1; $n <= $l_uid; $n += $bs) {
                 my $end = $n + $bs;
                 $end = $l_uid if $end > $l_uid;