function ConfigImporter::createExtensionChangelist

Populates the extension change list.

File

core/lib/Drupal/Core/Config/ConfigImporter.php, line 375

Class

ConfigImporter

Defines a configuration importer.

Namespace

Code

protected function createExtensionChangelist() {
    // Create an empty changelist.
    $this->extensionChangelist = $this->getEmptyExtensionsProcessedList();
    // Read the extensions information to determine changes.
    $current_extensions = $this->storageComparer
        ->getTargetStorage()
        ->read('core.extension');
    $new_extensions = $this->storageComparer
        ->getSourceStorage()
        ->read('core.extension');
    // If there is no extension information in sync then exit. This is probably
    // due to an empty sync directory.
    if (!$new_extensions) {
        return;
    }
    // Get a list of modules with dependency weights as values.
    $module_data = $this->moduleExtensionList
        ->getList();
    // Set the actual module weights.
    $module_list = array_combine(array_keys($module_data), array_keys($module_data));
    $module_list = array_map(function ($module) use ($module_data) {
        return $module_data[$module]->sort;
    }, $module_list);
    // Determine which modules to uninstall.
    $uninstall = array_keys(array_diff_key($current_extensions['module'], $new_extensions['module']));
    // Sort the list of newly uninstalled extensions by their weights, so that
    // dependencies are uninstalled last. Extensions of the same weight are
    // sorted in reverse alphabetical order, to ensure the order is exactly
    // opposite from installation. For example, this module list:
    // array(
    //   'actions' => 0,
    //   'ban' => 0,
    //   'options' => -2,
    //   'text' => -1,
    // );
    // will result in the following sort order:
    // -2   options
    // -1   text
    //  0 0 ban
    //  0 1 actions
    // @todo Move this sorting functionality to the extension system.
    array_multisort(array_values($module_list), SORT_ASC, array_keys($module_list), SORT_DESC, $module_list);
    $this->extensionChangelist['module']['uninstall'] = array_intersect(array_keys($module_list), $uninstall);
    // Determine which modules to install.
    $install = array_keys(array_diff_key($new_extensions['module'], $current_extensions['module']));
    // Ensure that installed modules are sorted in exactly the reverse order
    // (with dependencies installed first, and modules of the same weight sorted
    // in alphabetical order).
    $module_list = array_reverse($module_list);
    $this->extensionChangelist['module']['install'] = array_intersect(array_keys($module_list), $install);
    // If we're installing the install profile ensure it comes last. This will
    // occur when installing a site from configuration.
    $install_profile_key = array_search($new_extensions['profile'], $this->extensionChangelist['module']['install'], TRUE);
    if ($install_profile_key !== FALSE) {
        unset($this->extensionChangelist['module']['install'][$install_profile_key]);
        $this->extensionChangelist['module']['install'][] = $new_extensions['profile'];
    }
    // Work out what themes to install and to uninstall.
    $this->extensionChangelist['theme']['install'] = array_keys(array_diff_key($new_extensions['theme'], $current_extensions['theme']));
    $this->extensionChangelist['theme']['uninstall'] = array_keys(array_diff_key($current_extensions['theme'], $new_extensions['theme']));
}