/**
* Detect the contao installation root, version and configuration and set the TL_ROOT constant if not already exist.
*
* Existing values could originate from previous run or when run within contao.
*
* @param RootPackageInterface $package The package being processed.
*
* @return string|null
*
* @throws RuntimeException If the current working directory can not be determined.
*/
public function getContaoRoot(RootPackageInterface $package)
{
if (!isset($this->contaoRoot)) {
$roots = array_values(Environment::findContaoRoots($package));
if (!isset($roots[0])) {
return $this->contaoRoot = null;
}
$this->contaoRoot = $roots[0];
}
$systemDir = $this->contaoRoot . DIRECTORY_SEPARATOR . 'system' . DIRECTORY_SEPARATOR;
$configDir = $systemDir . 'config' . DIRECTORY_SEPARATOR;
$this->detectVersion($systemDir, $configDir, $this->contaoRoot);
$this->loadConfig($configDir);
return $this->contaoRoot;
}
/**
* Ugly hack to check duplicate installation after plugin update.
*
* @param PackageInterface $package The package to check.
*
* @return void
*
* @throws DuplicateContaoException When the Contao core has been found.
*/
private static function checkDuplicateInstallation(PackageInterface $package)
{
if ($package->getName() === 'contao/core' || in_array($package->getName(), Environment::$bundleNames)) {
$roots = Environment::findContaoRoots();
if (count($roots) > 1) {
throw new DuplicateContaoException('Warning: Contao core was installed but has been found in project root, ' . 'to recover from this problem please restart the operation');
}
}
}