/**
* Check whether the install has run before.
*
* Circa v4.7.betaX, we introduced a new mechanism for tracking installation
* and firing a post-install event. However, it's fairly difficult to test the
* edge-cases directly, so this canary should fire if there are any problems
* in the design/implementation of the installation-tracker.
*
* This should not exist. It should be removed in a future version.
*
* @param \Civi\Core\Event\SystemInstallEvent $event
* @throws \CRM_Core_Exception
*/
public static function check(SystemInstallEvent $event)
{
if (\CRM_Core_DAO::checkTableExists('civicrm_install_canary')) {
throw new \CRM_Core_Exception("Found installation canary. This suggests that something went wrong with tracking installation process. Please post to forum or JIRA.");
}
\Civi::log()->info('Creating canary table');
\CRM_Core_DAO::executeQuery('CREATE TABLE civicrm_install_canary (id int(10) unsigned NOT NULL)');
}
