[PATCH 1/7] t: localize the PI_CONFIG env

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

We don't want the user's ~/.public-inbox/config to be read from
during tests.  I only noticed this because I had a non-existent
pathname for one of my inboxes :x

I've also verified this change by running "inotifywait
~/.public-inbox/config -m" in another terminal while running
"make check"; (perhaps a portable solution could make it
into the test suite).
---
 t/indexlevels-mirror.t | 1 +
 t/xcpdb-reshard.t      | 1 +
 2 files changed, 2 insertions(+)

diff --git a/t/indexlevels-mirror.t b/t/indexlevels-mirror.t
index f1c338e1..3d4813be 100644
--- a/t/indexlevels-mirror.t
+++ b/t/indexlevels-mirror.t
@@ -32,6 +32,7 @@ sub import_index_incremental {
 	my ($v, $level) = @_;
 	my $this = "pi-$v-$level-indexlevels";
 	my ($tmpdir, $for_destroy) = tmpdir();
+	local $ENV{PI_CONFIG} = "$tmpdir/config";
 	my $ibx = PublicInbox::Inbox->new({
 		inboxdir => "$tmpdir/testbox",
 		name => $this,
diff --git a/t/xcpdb-reshard.t b/t/xcpdb-reshard.t
index ebf156a3..a4ab35d6 100644
--- a/t/xcpdb-reshard.t
+++ b/t/xcpdb-reshard.t
@@ -25,6 +25,7 @@ my $mime = PublicInbox::MIME->create(
 
 my ($this) = (split('/', $0))[-1];
 my ($tmpdir, $for_destroy) = tmpdir();
+local $ENV{PI_CONFIG} = "$tmpdir/config";
 my $ibx = PublicInbox::Inbox->new({
 	inboxdir => "$tmpdir/testbox",
 	name => $this,