layoutcomponents-8.x-1.14-beta2/modules/lc_simple_social_links/lc_simple_social_links.module

<?php

/**
 * @file
 * LC Simple Social Links module file.
 */

use Drupal\Core\Routing\RouteMatchInterface;

/**
 * Implements hook_page_attachments().
 */
function lc_simple_social_links_page_attachments(&$page) {
  $page['#attached']['library'][] = 'lc_simple_social_links/lc_simple_social_links';
}

/**
 * Implements hook_help().
 */
function lc_simple_social_links_help($route_name, RouteMatchInterface $route_match) {
  switch ($route_name) {
    // Create help page.
    case 'help.page.lc_simple_social_links':
      $module_handler = \Drupal::service('module_handler');
      $module_path = $module_handler->getModule('lc_simple_social_links')->getPath();
      $file = $module_path . '/README.md';
      if (!file_exists($file)) {
        return '';
      }

      // Get content from file.
      $reader = file_get_contents($file);

      // Return "clean" content.
      return preg_replace("/\r\n|\n|\r/", "<br>", $reader);
  }
}