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, 2 insertions, 1 deletions

diff --git a/lib/PublicInbox/V2Writable.pm b/lib/PublicInbox/V2Writable.pm
index 4d606dfe..231ed516 100644
--- a/lib/PublicInbox/V2Writable.pm
+++ b/lib/PublicInbox/V2Writable.pm
@@ -135,7 +135,7 @@ sub add {
         if (do_idx($self, $mime, $smsg)) {
                 $self->checkpoint;
         }
-
+        ++$self->{-nr_add}; # for lei convert
         $cmt;
 }
 
@@ -611,6 +611,7 @@ sub done {
         $self->lock_release(!!$nbytes) if $shards;
         $self->git->cleanup;
         die $err if $err;
+        delete $self->{-nr_add}; # for lei-convert
 }
 
 sub importer {