absolute_url.module

<?php

use Drupal\Core\Render\BubbleableMetadata;

/**
 * Implements hook_token_info()
 */

function absolute_url_token_info()
{

    $info['tokens']['site']['absolute_url'] = array(
        'name' => t('Absolute URL'),
        'description' => t('Url of the site, no language prefix garanted'),
    );

    return $info;
}


/**
 * Implements hook_tokens()
 */

function absolute_url_tokens($type, $tokens, array $data, array $options, BubbleableMetadata $bubbleable_metadata)
{
    $replacements = array();
    global $base_root;


    foreach ($tokens as $name => $original) {
        switch ($name) {
            case 'absolute_url':
                $replacements[$original] = $base_root;
                break;
        }
    }


    return $replacements;
}