v2: support incremental indexing + purge

This is important for people running mirrors via "git fetch",
as they need to be kept up-to-date.  Purging is also now
supported in mirrors.

The short-lived "--regenerate" option is gone and is now
implicitly enabled as a result.  It's still cheap when
article number regeneration is unnecessary, as we track
the range for each git repository.

1 files changed, 5 insertions, 0 deletions

diff --git a/lib/PublicInbox/Msgmap.pm b/lib/PublicInbox/Msgmap.pm
index c6a73155..5c37e169 100644
--- a/lib/PublicInbox/Msgmap.pm
+++ b/lib/PublicInbox/Msgmap.pm
@@ -92,6 +92,11 @@ sub last_commit {
         $self->meta_accessor('last_commit', $commit);
 }
 
+sub last_commit_n {
+        my ($self, $i, $commit) = @_;
+        $self->meta_accessor('last_commit'.$i, $commit);
+}
+
 sub created_at {
         my ($self, $second) = @_;
         $self->meta_accessor('created_at', $second);