lei import: --incremental default for NNTP and IMAP

No point in burning through bandwidth to import stuff we already
saw.  All this logic is shared with -watch but uses a different
pathname for lei since it's tied to lei/store (and not a
public-inbox).

1 files changed, 9 insertions, 4 deletions

diff --git a/lib/PublicInbox/NetReader.pm b/lib/PublicInbox/NetReader.pm
index 0ef66fd8..c7b43f01 100644
--- a/lib/PublicInbox/NetReader.pm
+++ b/lib/PublicInbox/NetReader.pm
@@ -373,6 +373,13 @@ sub run_commit_cb ($) {
         $cb->(@args);
 }
 
+sub _itrk ($$) {
+        my ($self, $uri) = @_;
+        return unless $self->{incremental};
+        # itrk_fn is set by lei
+        PublicInbox::IMAPTracker->new($$uri, $self->{itrk_fn});
+}
+
 sub _imap_fetch_all ($$$) {
         my ($self, $mic, $uri) = @_;
         my $sec = uri_section($uri);
@@ -389,8 +396,7 @@ sub _imap_fetch_all ($$$) {
                 return "E: $uri cannot get UIDVALIDITY";
         $r_uidnext //= $mic->uidnext($mbx) //
                 return "E: $uri cannot get UIDNEXT";
-        my $itrk = $self->{incremental} ?
-                        PublicInbox::IMAPTracker->new($$uri) : 0;
+        my $itrk = _itrk($self, $uri);
         my ($l_uidval, $l_uid) = $itrk ? $itrk->get_last : ();
         $l_uidval //= $r_uidval; # first time
         $l_uid //= 0;
@@ -543,8 +549,7 @@ sub _nntp_fetch_all ($$$) {
         # IMAPTracker is also used for tracking NNTP, UID == article number
         # LIST.ACTIVE can get the equivalent of UIDVALIDITY, but that's
         # expensive.  So we assume newsgroups don't change:
-        my $itrk = $self->{incremental} ?
-                        PublicInbox::IMAPTracker->new($$uri) : 0;
+        my $itrk = _itrk($self, $uri);
         my (undef, $l_art) = $itrk ? $itrk->get_last : ();
 
         # allow users to specify articles to refetch