StackFormation\Command\Stack\TreeCommand::renderNode PHP Method

    protected function renderNode($tree, $depth = 0, $cap = 0)
    {
        $n = count($tree);
        foreach ($tree as $k => $next) {
            for ($pre = "", $i = $depth - 1; $i >= 0; $i--) {
                $pre .= $cap >> $i & 1 ? "│  " : "   ";
            }
            echo $pre, --$n > 0 ? '├──' : '└──', $k, PHP_EOL;
            if (false === empty($next)) {
                $this->renderNode($next, $depth + 1, $cap << 1 | $n > 0);
            }
        }
    }