check git version requirements

This allows v1 tests to continue working on git 1.8.0 for
now.  This allows git 2.1.4 packaged with Debian 8 ("jessie")
to run old tests, at least.

I suppose it's safe to drop Debian 7 ("wheezy") due to our
dependency on git 1.8.0 for "merge-base --is-ancestor".

Writing V2 repositories requires git 2.6 for "get-mark"
support, so mask out tests for older gits.

1 files changed, 2 insertions, 0 deletions

diff --git a/t/v2reindex.t b/t/v2reindex.t
index 2dda80e8..8a3071b7 100644
--- a/t/v2reindex.t
+++ b/t/v2reindex.t
@@ -7,6 +7,8 @@ use PublicInbox::MIME;
 use PublicInbox::ContentId qw(content_digest);
 use File::Temp qw/tempdir/;
 use File::Path qw(remove_tree);
+require './t/common.perl';
+require_git(2.6);
 
 foreach my $mod (qw(DBD::SQLite Search::Xapian)) {
         eval "require $mod";