julienmonnerie/site/controllers/site.php

<?php

return function ($site) {

    // Get site URL (home page URL) to potentially override logo href and aria-label attributes in other templates
    $logoHref = $site->url();
    $logoAriaLabel = "Go to {$site->title()}'s home page";

    // Return general site controller data (merged by default with data from specific controllers)
    return compact(
        'logoAriaLabel',
        'logoHref',
    );
};