[PATCH 15/17] tests: quiet down commit graph

[Eric Wong <e@80x24.org>]

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.
---
 MANIFEST       | 1 +
 t/.gitconfig   | 4 ++++
 t/purge.t      | 1 +
 t/replace.t    | 3 +++
 t/v2mirror.t   | 2 ++
 t/v2writable.t | 2 ++
 6 files changed, 13 insertions(+)
 create mode 100644 t/.gitconfig

diff --git a/MANIFEST b/MANIFEST
index 689d3d4e..9475667b 100644
--- a/MANIFEST
+++ b/MANIFEST
@@ -194,6 +194,7 @@ scripts/report-spam
 scripts/slrnspool2maildir
 scripts/ssoma-replay
 scripts/xhdr-num2mid
+t/.gitconfig
 t/address.t
 t/admin.t
 t/altid.t
diff --git a/t/.gitconfig b/t/.gitconfig
new file mode 100644
index 00000000..645a3041
--- /dev/null
+++ b/t/.gitconfig
@@ -0,0 +1,4 @@
+; this becomes ~/.gitconfig for tests where we use
+; "$ENV{HOME} = '/path/to/worktree/t'" in tests
+[gc]
+	writeCommitGraph = false
diff --git a/t/purge.t b/t/purge.t
index 12644d69..db09b731 100644
--- a/t/purge.t
+++ b/t/purge.t
@@ -11,6 +11,7 @@ foreach my $mod (@mods) {
 	plan skip_all => "missing $mod for t/purge.t" if $@;
 };
 use Cwd qw(abs_path); # we need this since we chdir below
+local $ENV{HOME} = abs_path('t');
 my $purge = abs_path('blib/script/public-inbox-purge');
 my ($tmpdir, $for_destroy) = tmpdir();
 use_ok 'PublicInbox::V2Writable';
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";
diff --git a/t/v2mirror.t b/t/v2mirror.t
index 96657fdc..a45a262e 100644
--- a/t/v2mirror.t
+++ b/t/v2mirror.t
@@ -4,7 +4,9 @@ use strict;
 use warnings;
 use Test::More;
 require './t/common.perl';
+use Cwd qw(abs_path);
 require_git(2.6);
+local $ENV{HOME} = abs_path('t');
 
 # Integration tests for HTTP cloning + mirroring
 foreach my $mod (qw(Plack::Util Plack::Builder
diff --git a/t/v2writable.t b/t/v2writable.t
index 7519b487..8bbcd45a 100644
--- a/t/v2writable.t
+++ b/t/v2writable.t
@@ -6,11 +6,13 @@ use Test::More;
 use PublicInbox::MIME;
 use PublicInbox::ContentId qw(content_digest);
 require './t/common.perl';
+use Cwd qw(abs_path);
 require_git(2.6);
 foreach my $mod (qw(DBD::SQLite Search::Xapian)) {
 	eval "require $mod";
 	plan skip_all => "$mod missing for nntpd.t" if $@;
 }
+local $ENV{HOME} = abs_path('t');
 use_ok 'PublicInbox::V2Writable';
 umask 007;
 my ($inboxdir, $for_destroy) = tmpdir();