TYPO3 Core

I have a multi-site setup in 9 LTS and I am doing the following in a Symfony console command:

$siteFinder            = $objectManager->get(SiteFinder::class);
$site                  = $siteFinder->getSiteByIdentifier($input->getArgument('site'));

$objectManager         = GeneralUtility::makeInstance(ObjectManager::class);
$configurationManager  = $objectManager->get(ConfigurationManagerInterface::class);
$contentObjectRenderer = $objectManager->get(ContentObjectRenderer::class);
$configurationManager->setContentObject($contentObjectRenderer);

$settings = $configurationManager->getConfiguration(ConfigurationManagerInterface::CONFIGURATION_TYPE_FULL_TYPOSCRIPT);

Doing this, the ConfigurationManager always returns the configuration for the root page of the first site it finds in the page tree, as the following code at https://github.com/TYPO3/TYPO3.CMS/blob/9.5/typo3/sysext/extbase/Classes/Configuration/BackendConfigurationManager.php#L158 does not handle the current site:

protected function getCurrentPageIdFromCurrentSiteRoot()
{
    $queryBuilder = GeneralUtility::makeInstance(ConnectionPool::class)
        ->getQueryBuilderForTable('pages');

    $queryBuilder
        ->getRestrictions()
        ->removeAll()
        ->add(GeneralUtility::makeInstance(DeletedRestriction::class))
        ->add(GeneralUtility::makeInstance(HiddenRestriction::class));

    $rootPage = $queryBuilder
        ->select('uid')
        ->from('pages')
        ->where(
            $queryBuilder->expr()->eq('is_siteroot', $queryBuilder->createNamedParameter(1, \PDO::PARAM_INT))
        )
        ->orderBy('sorting')
        ->execute()
        ->fetch();

    if (empty($rootPage)) {
        return 0;
    }

    return (int)$rootPage['uid'];
}

Also affected:
There is no other place where $this->currentPageId gets set than in https://github.com/TYPO3/TYPO3.CMS/blob/9.5/typo3/sysext/extbase/Classes/Configuration/BackendConfigurationManager.php#L130, so $this->currentPageId is only available in a second call of this function:

protected function getCurrentPageId()
{
    if ($this->currentPageId !== null) {
        return $this->currentPageId;
    }

    $this->currentPageId = $this->getCurrentPageIdFromGetPostData() ?: $this->getCurrentPageIdFromCurrentSiteRoot();
    $this->currentPageId = $this->currentPageId ?: $this->getCurrentPageIdFromRootTemplate();
    $this->currentPageId = $this->currentPageId ?: self::DEFAULT_BACKEND_STORAGE_PID;

    return $this->currentPageId;
}

At the moment I succeeded with the workaround of faking the current page id in my console command like this:

$siteFinder            = $objectManager->get(SiteFinder::class);
$site                  = $siteFinder->getSiteByIdentifier($input->getArgument('site'));

if (!isset($_GET)) {
    $_GET = [];
}
$_GET['id'] = $site->getRootPageId();

$objectManager         = GeneralUtility::makeInstance(ObjectManager::class);
$configurationManager  = $objectManager->get(ConfigurationManagerInterface::class);
$contentObjectRenderer = $objectManager->get(ContentObjectRenderer::class);
$configurationManager->setContentObject($contentObjectRenderer);

$settings = $configurationManager->getConfiguration(ConfigurationManagerInterface::CONFIGURATION_TYPE_FULL_TYPOSCRIPT);

This is, however, a quite dirty workaround. A quick fix would be to offer a setter for $this->currentPageId. However, maybe it would be better to offer a setter for the current site and from that fallback to the site's $rootPageId if no $currentPageId is set.