function ThemeExtensionList::createExtensionInfo

Overrides ExtensionList::createExtensionInfo

File

core/lib/Drupal/Core/Extension/ThemeExtensionList.php, line 265

Class

ThemeExtensionList

Provides a list of available themes.

Namespace

Code

protected function createExtensionInfo(Extension $extension) {
    $info = parent::createExtensionInfo($extension);
    // In the past, Drupal used to default to the `stable` theme as the base
    // theme. Explicitly opting out by specifying `base theme: false` was (and
    // still is) possible. However, defaulting to `base theme: stable` prevents
    // automatic updates to the next major version of Drupal, since each major
    // version may have a different version of "the stable theme", for example:
    // - for Drupal 8: `stable`
    // - for Drupal 9: `stable9`
    // - for Drupal 10: `stable10`
    // - et cetera
    // It is impossible to reliably determine which should be used by default,
    // hence we now require the base theme to be explicitly specified.
    if (!isset($info['base theme'])) {
        @trigger_error(sprintf('There is no `base theme` property specified in the %s.info.yml file. The optionality of the `base theme` property is deprecated in drupal:8.8.0 and is removed from drupal:9.0.0. All Drupal 8 themes must add `base theme: stable` to their *.info.yml file for them to continue to work as-is in future versions of Drupal. Drupal 9 requires the `base theme` property to be specified. See https://www.drupal.org/node/3066038', $extension->getName()), E_USER_DEPRECATED);
        $info['base theme'] = 'stable';
    }
    // Remove the default Stable base theme when 'base theme: false' is set in
    // a theme .info.yml file.
    if ($info['base theme'] === FALSE) {
        unset($info['base theme']);
    }
    if (!empty($info['base theme'])) {
        // Add the base theme as a proper dependency.
        $info['dependencies'][] = $info['base theme'];
    }
    // Prefix screenshot with theme path.
    if (!empty($info['screenshot'])) {
        $info['screenshot'] = $extension->getPath() . '/' . $info['screenshot'];
    }
    return $info;
}