lei convert: fix repeat and idempotent v2 output

We should be able to treat v2 outputs just like any other mail
format, with the exception that content dedupe is always
enforced by the v2 format.

This allows users hosting v2 public-inboxes to catch up broken
synchronization from alternate archives such as the mbox
archives hosted by https://lists.gnu.org/

Link: https://public-inbox.org/meta/20231114-hypersonic-papaya-starling-e1cfc8@nitro/

1 files changed, 6 insertions, 2 deletions

diff --git a/lib/PublicInbox/LeiConvert.pm b/lib/PublicInbox/LeiConvert.pm
index 22aba81a..4a1f8323 100644
--- a/lib/PublicInbox/LeiConvert.pm
+++ b/lib/PublicInbox/LeiConvert.pm
@@ -34,9 +34,13 @@ sub process_inputs { # via wq_do
         $self->SUPER::process_inputs;
         my $lei = $self->{lei};
         delete $lei->{1};
-        my $l2m = delete $self->{l2m};
-        delete $self->{wcb}; # commit
+        my $l2m = delete $lei->{l2m};
         my $nr_w = delete($l2m->{-nr_write}) // 0;
+        delete $self->{wcb}; # commit
+        if (my $v2w = delete $lei->{v2w}) {
+                $nr_w = $v2w->wq_do('done'); # may die
+                $v2w->wq_close;
+        }
         my $d = (delete($l2m->{-nr_seen}) // 0) - $nr_w;
         $d = $d ? " ($d duplicates)" : '';
         $lei->qerr("# converted $nr_w messages$d");