feed: r= parameter supports "HEAD" as a revision

public-inbox git repositories require a "HEAD" ref to
function correctly anyways.

diff --git a/lib/PublicInbox/Feed.pm b/lib/PublicInbox/Feed.pm
index 8dd6d036175a433ebf168e56a264bfb0813be877..51216aaa1c28943cf396fffeaaa9b9dace0770ee 100644 (file)
--- a/lib/PublicInbox/Feed.pm
+++ b/lib/PublicInbox/Feed.pm
@@ -141,7 +141,7 @@ sub each_recent_blob {
        my $hex = '[a-f0-9]';
        my $addmsg = qr!^:000000 100644 \S+ \S+ A\t(${hex}{2}/${hex}{38})$!;
        my $delmsg = qr!^:100644 000000 \S+ \S+ D\t(${hex}{2}/${hex}{38})$!;
-       my $refhex = qr/${hex}{4,40}(?:~\d+)?/;
+       my $refhex = qr/(?:HEAD|${hex}{4,40})(?:~\d+)?/;
        my $cgi = $ctx->{cgi};
 
        # revision ranges may be specified