/**
* Check if an update is possible at all
*
* @param string $version The target version number
* @return bool TRUE on success
* @throws \TYPO3\CMS\Install\Status\Exception
*/
public function checkPreConditions($version)
{
$success = true;
$messages = array();
/** @var StatusUtility $statusUtility */
$statusUtility = $this->objectManager->get(StatusUtility::class);
// Folder structure test: Update can be done only if folder structure returns no errors
/** @var $folderStructureFacade \TYPO3\CMS\Install\FolderStructure\StructureFacade */
$folderStructureFacade = $this->objectManager->get(DefaultFactory::class)->getStructure();
$folderStructureErrors = $statusUtility->filterBySeverity($folderStructureFacade->getStatus(), 'error');
$folderStructureWarnings = $statusUtility->filterBySeverity($folderStructureFacade->getStatus(), 'warning');
if (!empty($folderStructureErrors) || !empty($folderStructureWarnings)) {
$success = false;
/** @var $message StatusInterface */
$message = $this->objectManager->get(ErrorStatus::class);
$message->setTitle('Automatic TYPO3 CMS core update not possible: Folder structure has errors or warnings');
$message->setMessage('To perform an update, the folder structure of this TYPO3 CMS instance must' . ' stick to the conventions, or the update process could lead to unexpected' . ' results and may be hazardous to your system');
$messages[] = $message;
}
// No core update on windows
if (TYPO3_OS === 'WIN') {
$success = false;
/** @var $message StatusInterface */
$message = $this->objectManager->get(ErrorStatus::class);
$message->setTitle('Automatic TYPO3 CMS core update not possible: Update not supported on Windows OS');
$messages[] = $message;
}
if ($success) {
// Explicit write check to document root
$file = PATH_site . StringUtility::getUniqueId('install-core-update-test-');
$result = @touch($file);
if (!$result) {
$success = false;
/** @var $message StatusInterface */
$message = $this->objectManager->get(ErrorStatus::class);
$message->setTitle('Automatic TYPO3 CMS core update not possible: No write access to document root');
$message->setMessage('Could not write a file in path "' . PATH_site . '"!');
$messages[] = $message;
} else {
unlink($file);
}
if (!$this->checkCoreFilesAvailable($version)) {
// Explicit write check to upper directory of current core location
$coreLocation = @realPath($this->symlinkToCoreFiles . '/../');
$file = $coreLocation . '/' . StringUtility::getUniqueId('install-core-update-test-');
$result = @touch($file);
if (!$result) {
$success = false;
/** @var $message StatusInterface */
$message = $this->objectManager->get(ErrorStatus::class);
$message->setTitle('Automatic TYPO3 CMS core update not possible: No write access to TYPO3 CMS core location');
$message->setMessage('New TYPO3 CMS core should be installed in "' . $coreLocation . '", but this directory is not writable!');
$messages[] = $message;
} else {
unlink($file);
}
}
}
if ($success && !$this->coreVersionService->isInstalledVersionAReleasedVersion()) {
$success = false;
/** @var $message StatusInterface */
$message = $this->objectManager->get(ErrorStatus::class);
$message->setTitle('Automatic TYPO3 CMS core update not possible: You are running a development version of TYPO3');
$message->setMessage('Your current version is specified as ' . $this->coreVersionService->getInstalledVersion() . '.' . ' This is a development version and can not be updated automatically. If this is a "git"' . ' checkout, please update using git directly.');
$messages[] = $message;
}
$this->messages = $messages;
return $success;
}