_registry_rebuild

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7

_registry_rebuild()

@see registry_rebuild.

Related topics

Code registry

The code registry engine.

Code

includes/registry.inc, line 21

<?php
function _registry_rebuild() {

  // The registry serves as a central autoloader for all classes, including
  // the database query builders. However, the registry rebuild process
  // requires write ability to the database, which means having access to the
  // query builders that require the registry in order to be loaded. That
  // causes a fatal race condition. Therefore we manually include the
  // appropriate query builders for the currently active database before the
  // registry rebuild process runs.
  $connection_info = Database::getConnectionInfo();
  $driver = $connection_info['default']['driver'];
  require_once DRUPAL_ROOT . '/includes/database/query.inc';
  require_once DRUPAL_ROOT . '/includes/database/select.inc';
  require_once DRUPAL_ROOT . '/includes/database/' . $driver . '/query.inc';

  // Get current list of modules and their files.
  $modules = system_rebuild_module_data();
  // Get the list of files we are going to parse.
  $files = array();
  foreach ($modules as &$module) {
    $dir = dirname($module->uri);

    // Store the module directory for use in hook_registry_files_alter().
    $module->dir = $dir;

    if ($module->status) {
      // Add files for enabled modules to the registry.
      foreach ($module->info['files'] as $file) {
        $files["$dir/$file"] = array('module' => $module->name, 'weight' => $module->weight);
      }
    }
  }
  foreach (file_scan_directory('includes', '/\.inc$/') as $filename => $file) {
    $files["$filename"] = array('module' => '', 'weight' => 0);
  }

  // Allow modules to manually modify the list of files before the registry
  // parses them. The $modules array provides the .info file information, which
  // includes the list of files registered to each module. Any files in the
  // list can then be added to the list of files that the registry will parse,
  // or modify attributes of a file.
  drupal_alter('registry_files', $files, $modules);
  foreach (registry_get_parsed_files() as $filename => $file) {
    // Add the file creation and modification dates to those files we have
    // already parsed.
    if (isset($files[$filename])) {
      $files[$filename]['filectime'] = $file['filectime'];
      $files[$filename]['filemtime'] = $file['filemtime'];
    }
    else {
      // Flush the registry of resources in files that are no longer on disc
      // or are in files that no installed modules require to be parsed.
      db_delete('registry')
        ->condition('filename', $filename)
        ->execute();
      db_delete('registry_file')
        ->condition('filename', $filename)
        ->execute();
    }
  }
  $parsed_files = _registry_parse_files($files);

  $unchanged_resources = array();
  $lookup_cache = array();
  if ($cache = cache_get('lookup_cache', 'cache_bootstrap')) {
    $lookup_cache = $cache->data;
  }
  foreach ($lookup_cache as $key => $file) {
    // If the file for this cached resource is carried over unchanged from
    // the last registry build, then we can safely re-cache it.
    if ($file && in_array($file, array_keys($files)) && !in_array($file, $parsed_files)) {
      $unchanged_resources[$key] = $file;
    }
  }
  module_implements('', FALSE, TRUE);
  _registry_check_code(REGISTRY_RESET_LOOKUP_CACHE);

  // We have some unchanged resources, warm up the cache - no need to pay
  // for looking them up again.
  if (count($unchanged_resources) > 0) {
    cache_set('lookup_cache', $unchanged_resources, 'cache_bootstrap');
  }
}
?>

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