$ENV{GIT_COMMITTER_EMAIL} = 'lei@example.com';
$ENV{GIT_COMMITTER_NAME} = 'lei user';
my (undef, $fn, $lineno) = caller(0);
my $t = "$fn:$lineno";
$ENV{GIT_COMMITTER_EMAIL} = 'lei@example.com';
$ENV{GIT_COMMITTER_NAME} = 'lei user';
my (undef, $fn, $lineno) = caller(0);
my $t = "$fn:$lineno";