Installer::install

public function install()
{
	if(!self::checkVersion())
	{
		return true;
	}

	foreach($this->getInstallable() as $installable)
	{
		if($installable->isInstalled())
		{
			continue;
		}

		$installable->install();
	}

	if(!$this->hasErrors())
	{
		self::updateInstalledVersion();
	}

	return $this->hasErrors();
}