Results

/**
 * Implements hook_theme_registry_alter().
 *
 * Helps us alter some Search API status pages.
 */
function acquia_search_solr_theme_registry_alter(&$theme_registry) {
  $module_handler = \Drupal::moduleHandler();
  $module_path = $module_handler->getModule('acquia_search_solr')->getPath();

  $theme_registry['search_api_index']['variables']['acquia_search_info_box'] = NULL;
  $theme_registry['search_api_index']['path'] = $module_path . '/templates';

/**
 * Preprocess variables for AT Layout Plugin templates.
 * This function is added in at_core_theme_registry_alter().
 *
 * @param $variables
 */
function at_core_preprocess_at_layout(&$variables) {
  $attributes = _at_core_layout_plugin_attributes($variables);
  if (isset($attributes['role'])) {

/**
 * Implements hook_theme_registry_alter().
 *
 * @param $theme_registry
 */
function at_core_theme_registry_alter(&$theme_registry) {
  $theme_hooks = LayoutDiscoveryPlugin::getThemeHooks();

  // Only add preprocess functions if entity exposes theme function, and this
  // layout is provided by at_core.
  if (!empty($theme_hooks)) {
    foreach ($theme_registry as $theme_hook => $info) {

/**
 * Implements hook_theme_registry_alter().
 *
 * Template overrides for local tasks.
 */
function admin_local_tasks_theme_registry_alter(&$theme_registry) {
  /** @var \Drupal\Core\Extension\ModuleExtensionList $extension */
  $extension = \Drupal::service('extension.list.module');
  $path = $extension->getPath('admin_local_tasks');

  if (isset($theme_registry['menu_local_tasks'])) {
    $theme_registry['menu_local_tasks']['path'] = $path . '/templates/navigation';

/**
 * Implements hook_theme_registry_alter().
 */
function alter_blocks_element_markup_theme_registry_alter(array &$theme_registry) {
  $path = \Drupal::service('extension.list.module')->getPath('alter_blocks_element_markup');
  $theme_registry['block']['path'] = $path . '/templates';
  \Drupal::logger('AlterBlocksElementMarkup')->notice(print_r($theme_registry['block'], true));
}

/**

/**
 * Implements hook_theme_registry_alter().
 *
 * We still want the image_theme to process the image, just output it
 * in a different template, and only when it used in an AMP component.
 * A theme could do this with just theme_suggestions_alter(), but if a module
 * provides an alternate template it won't be discovered automatically by the
 * theme system. Using theme_register_alter() we can force the theme system to

 * actually use directly, then it will be available for the suggestion.
 */
function amp_theme_registry_alter(&$theme_registry) {
  $theme_registry['amp_image_wrapper'] = $theme_registry['image'];
  $theme_registry['amp_image_wrapper']['template'] = 'amp-image-wrapper';
  $theme_registry['amp_image_wrapper']['path'] = \Drupal::service('extension.list.module')->getPath('amp') . '/templates';
}

/**

/**
 * Implements hook_theme_registry_alter().
 */
function append_file_info_theme_registry_alter(&$theme_registry) {
  foreach ($theme_registry['file_link']['preprocess functions'] as $key => $value) {
    if ($value == 'template_preprocess_file_link') {
      $theme_registry['file_link']['preprocess functions'][$key] = '_append_file_info_preprocess_file_link';
    }
  }
}

/**
 * Preprocess variables for AT Layout Plugin templates.
 * This function is added in at_core_theme_registry_alter().
 *
 * @param $variables
 */
function at_core_preprocess_at_layout(&$variables) {
  $attributes = _at_core_layout_plugin_attributes($variables);
  if (isset($attributes['role'])) {

/**
 * Implements hook_theme_registry_alter().
 *
 * @param $theme_registry
 */
function at_core_theme_registry_alter(&$theme_registry) {
  $theme_hooks = LayoutDiscoveryPlugin::getThemeHooks();

  // Only add preprocess functions if entity exposes theme function, and this
  // layout is provided by at_core.
  if (!empty($theme_hooks)) {
    foreach ($theme_registry as $theme_hook => $info) {

/**
 * Implements hook_theme_registry_alter().
 */
function audiofield_theme_registry_alter(&$theme_registry) {
  /*
   * By default, Drupal 8 does not include theme suggestions from inside the
   * module in which they were created, so we must add them manually here.
   */
  $path = \Drupal::service('extension.list.module')->getPath('audiofield');
  $audioplayer_templates = drupal_find_theme_templates($theme_registry, '.html.twig', $path);

/**
 * Implements hook_theme_registry_alter().
 */
function bee_theme_registry_alter(&$theme_registry) {
  $theme_registry['field__node__field_availability_hourly'] = [
    'template' => 'field-availability-hourly',
    'path' => \Drupal::service('extension.list.module')->getPath('bee') . '/templates',
    'render element' => 'element',
    'base hook' => 'field',
    'type' => 'module',

/**
 * Implements hook_theme_registry_alter().
 *
 * Template overrides for local tasks.
 */
function better_local_tasks_theme_registry_alter(&$theme_registry) {
  $admin_context = \Drupal::service('router.admin_context');

  if (!$admin_context->isAdminRoute()) {
    if (!isset($theme_registry['block__local_tasks_block'])) {
      $theme_registry['block__local_tasks_block'] = $theme_registry['block'];
      $theme_registry['block__local_tasks_block']['template'] = 'block--local-tasks-block';

/**
 * Implements hook_theme_registry_alter().
 */
function bideo_theme_registry_alter(&$theme_registry) {
  $theme_registry['progress_bar']['preprocess'][] = 'bideo_preprocess_progress_bar';
  $theme_registry['progress_bar']['path'] = \Drupal::moduleHandler()->getModule('bideo')->getPath() . '/templates/';
  $theme_registry['progress_bar']['template'] = 'progress-bar';
}

/**

/**
 * Implements hook_theme_registry_alter().
 */
function block_form_alter_test_theme_registry_alter(&$theme_registry) {
  $theme_registry['block']['path'] = \Drupal::service('extension.list.module')->getPath('block_form_alter_test') . '/templates/block';
}

/**
 * Alter the theme registry to add templates for existing bundles of custom blocks.
 * Implements hook_theme_registry_alter().
 *
 * @param $theme_registry
 *
 * @see \Drupal\Core\Theme\Registry::processExtension()
 * @see hook_theme()
 */

 * @see hook_theme()
 */
function block_generation_theme_registry_alter(&$theme_registry) {
  $block_generation_theme_registry = &drupal_static(__FUNCTION__, []);

  if (!$block_generation_theme_registry) {
    $cid = 'block_generation:theme_registry';
    $block_generation_theme_registry = [];

   *
   * @see \Drupal\bootstrap\Plugin\Alter\ThemeRegistry::alter()
   * @see bootstrap_theme_registry_alter()
   * @see bootstrap_theme()
   * @see hook_theme()
   */
  public static function getThemeHooks() {
    $hooks['bootstrap_carousel'] = [
      'variables' => [

   *
   * @see \Drupal\bootstrap3\Plugin\Alter\ThemeRegistry::alter()
   * @see bootstrap_theme_registry_alter()
   * @see bootstrap_theme()
   * @see hook_theme()
   */
  public static function getThemeHooks() {
    $hooks['bootstrap_carousel'] = [
      'variables' => [

/**
 * Implements hook_theme_registry_alter().
 */
function bootstrap_layouts_theme_registry_alter(&$theme_registry) {
  // Immediately return if the layout manager cannot be loaded.
  // This can happen during the update process.
  if (!\Drupal::hasService('plugin.manager.core.layout')) {
    return;
  }

/**
 * Implements hook_theme_registry_alter().
 */
function bricks_inline_theme_registry_alter(&$theme_registry) {
  $theme_registry['inline_entity_form_entity_table']['theme path'] = \Drupal::service('extension.list.module')->getPath('bricks_inline');
  $theme_registry['inline_entity_form_entity_table']['function'] = 'bricks_inline_inline_entity_form_entity_table';
}

/**
 * Implements hook_inline_entity_form_reference_form_alter().

/**
 * Overrides theme_inline_entity_form_entity_table()
 * with a help from hook_theme_registry_alter().
 */
function bricks_inline_inline_entity_form_entity_table($variables) {
  if (!empty($variables['table'])) {
    return \Drupal::service('renderer')->render($variables['table']);
  }
}

/**
 * Implements hook_theme_registry_alter().
 */
function checkboxes_filter_theme_registry_alter(array &$theme_registry) {
  $theme_registry['checkboxes']['preprocess functions'][] = 'checkboxes_filter_preprocess_checkboxes';
}

/**
 * Preprocess for the theme_checkboxes theming.
 */