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, 7 insertions, 3 deletions

diff --git a/lib/PublicInbox/OverIdx.pm b/lib/PublicInbox/OverIdx.pm
index 0549c68b..9ee6d613 100644
--- a/lib/PublicInbox/OverIdx.pm
+++ b/lib/PublicInbox/OverIdx.pm
@@ -15,6 +15,7 @@ use IO::Handle;
 use DBI qw(:sql_types); # SQL_BLOB
 use PublicInbox::MID qw/id_compress mids_for_index references/;
 use PublicInbox::SearchMsg qw(subject_normalized);
+use PublicInbox::MsgTime qw(msg_timestamp msg_datestamp);
 use Compress::Zlib qw(compress);
 use PublicInbox::Search;
 
@@ -246,7 +247,7 @@ sub subject_path ($) {
 }
 
 sub add_overview {
-        my ($self, $mime, $bytes, $num, $oid, $mid0) = @_;
+        my ($self, $mime, $bytes, $num, $oid, $mid0, $times) = @_;
         my $lines = $mime->body_raw =~ tr!\n!\n!;
         my $smsg = bless {
                 mime => $mime,
@@ -255,7 +256,8 @@ sub add_overview {
                 lines => $lines,
                 blob => $oid,
         }, 'PublicInbox::SearchMsg';
-        my $mids = mids_for_index($mime->header_obj);
+        my $hdr = $mime->header_obj;
+        my $mids = mids_for_index($hdr);
         my $refs = parse_references($smsg, $mid0, $mids);
         my $subj = $smsg->subject;
         my $xpath;
@@ -266,7 +268,9 @@ sub add_overview {
         my $dd = $smsg->to_doc_data($oid, $mid0);
         utf8::encode($dd);
         $dd = compress($dd);
-        my $values = [ $smsg->ts, $smsg->ds, $num, $mids, $refs, $xpath, $dd ];
+        my $ds = msg_timestamp($hdr, $times->{autime});
+        my $ts = msg_datestamp($hdr, $times->{cotime});
+        my $values = [ $ts, $ds, $num, $mids, $refs, $xpath, $dd ];
         add_over($self, $values);
 }