tests: quiet down commit graph

Newer versions of git enable the commit graph by default.
Since we blow away our temporary directories every test,
generating graphis is a waste and clutters stderr with
"Computing commit graph generation numbers" messages.

1 files changed, 3 insertions, 0 deletions

diff --git a/t/replace.t b/t/replace.t
index 039c6bc6..e9361856 100644
--- a/t/replace.t
+++ b/t/replace.t
@@ -6,12 +6,15 @@ use Test::More;
 use PublicInbox::MIME;
 use PublicInbox::InboxWritable;
 require './t/common.perl';
+use Cwd qw(abs_path);
 require_git(2.6); # replace is v2 only, for now...
 foreach my $mod (qw(DBD::SQLite)) {
         eval "require $mod";
         plan skip_all => "$mod missing for $0" if $@;
 }
 
+local $ENV{HOME} = abs_path('t');
+
 sub test_replace ($$$) {
         my ($v, $level, $opt) = @_;
         diag "v$v $level replace";