public function onInstallingSite(InstallingSite $event)
 {
     if (!is_dir($this->masterPath)) {
         // Master copy doesn't yet exist, so let it be created.
         return;
     }
     // Import the site's folder.
     if (is_dir($this->drupal->getSitePath())) {
         $this->filesystem->chmod($this->drupal->getSitePath(), 0777, 00, true);
     }
     $this->filesystem->mirror($this->masterPath, $this->drupal->getSitePath(), null, ['override' => true, 'delete' => true]);
     // Clean the database. (Mainly for SQLite.)
     $this->processRunner->run(ProcessBuilder::create()->setPrefix($this->binary)->add('sql-drop')->add('--uri=' . $this->drupal->getUri())->add('--yes')->setWorkingDirectory($this->drupal->getPath())->setTimeout(null)->getProcess());
     // Import the database.
     $this->processRunner->run(ProcessBuilder::create()->setPrefix($this->binary)->add('sql-query')->add('--file=' . $this->drupal->getSitePath() . '/db.sql')->add('--uri=' . $this->drupal->getUri())->add('--yes')->setWorkingDirectory($this->drupal->getPath())->setTimeout(null)->getProcess());
     $this->filesystem->remove($this->drupal->getSitePath() . '/db.sql');
     $this->eventDispatcher->dispatch(SiteCloned::NAME, new SiteCloned($this->drupal));
     // Signify that a site isn't actually being installed.
     $event->stopPropagation();
 }