index: use git commit times on missing Date/Received

When indexing messages without Date: and/or Received: headers,
fall back to using timestamps originally recorded by git in the
commit object.  This allows git mirrors to preserve the import
datestamp and timestamp of a message according to what was fed
into git, instead of blindly falling back to the current time.

1 files changed, 6 insertions, 6 deletions

diff --git a/lib/PublicInbox/MsgTime.pm b/lib/PublicInbox/MsgTime.pm
index 8703d7bc..bd7ef811 100644
--- a/lib/PublicInbox/MsgTime.pm
+++ b/lib/PublicInbox/MsgTime.pm
@@ -167,21 +167,21 @@ sub msg_date_only ($) {
 }
 
 # Favors Received header for sorting globally
-sub msg_timestamp ($) {
-        my ($hdr) = @_; # Email::MIME::Header
+sub msg_timestamp ($;$) {
+        my ($hdr, $fallback) = @_; # Email::MIME::Header
         my $ret;
         $ret = msg_received_at($hdr) and return time_response($ret);
         $ret = msg_date_only($hdr) and return time_response($ret);
-        wantarray ? (time, '+0000') : time;
+        time_response([ $fallback // time, '+0000' ]);
 }
 
 # Favors the Date: header for display and sorting within a thread
-sub msg_datestamp ($) {
-        my ($hdr) = @_; # Email::MIME::Header
+sub msg_datestamp ($;$) {
+        my ($hdr, $fallback) = @_; # Email::MIME::Header
         my $ret;
         $ret = msg_date_only($hdr) and return time_response($ret);
         $ret = msg_received_at($hdr) and return time_response($ret);
-        wantarray ? (time, '+0000') : time;
+        time_response([ $fallback // time, '+0000' ]);
 }
 
 1;