check git version requirements

[public-inbox.git] / lib / PublicInbox / SearchIdx.pm

diff --git a/lib/PublicInbox/SearchIdx.pm b/lib/PublicInbox/SearchIdx.pm
index fd48169d4d7bb73170906f3e007c56da6659848b..cc1ac56b933d65998bdc915711658ea5c6b4f06e 100644 (file)
--- a/lib/PublicInbox/SearchIdx.pm
+++ b/lib/PublicInbox/SearchIdx.pm
@@ -646,6 +646,7 @@ sub _git_log {
                                --raw -r --no-abbrev/, $range);
 }
 
+# --is-ancestor requires git 1.8.0+
 sub is_ancestor ($$$) {
        my ($git, $cur, $tip) = @_;
        return 0 unless $git->check($cur);