* * For the full copyright and license information, please view the LICENSE * file that was distributed with this source code. */ namespace Symfony\Component\DependencyInjection\ParameterBag; use Symfony\Component\DependencyInjection\Exception\RuntimeException; use Symfony\Component\DependencyInjection\Exception\InvalidArgumentException; /** * @author Nicolas Grekas
*/ class EnvPlaceholderParameterBag extends ParameterBag { private $envPlaceholders = array(); /** * {@inheritdoc} */ public function get($name) { if (0 === strpos($name, 'env(') && ')' === substr($name, -1) && 'env()' !== $name) { $env = substr($name, 4, -1); if (isset($this->envPlaceholders[$env])) { foreach ($this->envPlaceholders[$env] as $placeholder) { return $placeholder; // return first result } } if (preg_match('/\W/', $env)) { throw new InvalidArgumentException(sprintf('Invalid %s name: only "word" characters are allowed.', $name)); } if ($this->has($name)) { $defaultValue = parent::get($name); if (null !== $defaultValue && !is_scalar($defaultValue)) { throw new RuntimeException(sprintf('The default value of an env() parameter must be scalar or null, but "%s" given to "%s".', gettype($defaultValue), $name)); } } $uniqueName = md5($name.uniqid(mt_rand(), true)); $placeholder = sprintf('env_%s_%s', $env, $uniqueName); $this->envPlaceholders[$env][$placeholder] = $placeholder; return $placeholder; } return parent::get($name); } /** * Returns the map of env vars used in the resolved parameter values to their placeholders. * * @return string[][] A map of env var names to their placeholders */ public function getEnvPlaceholders() { return $this->envPlaceholders; } /** * Merges the env placeholders of another EnvPlaceholderParameterBag. */ public function mergeEnvPlaceholders(self $bag) { if ($newPlaceholders = $bag->getEnvPlaceholders()) { $this->envPlaceholders += $newPlaceholders; foreach ($newPlaceholders as $env => $placeholders) { $this->envPlaceholders[$env] += $placeholders; } } } /** * {@inheritdoc} */ public function resolve() { if ($this->resolved) { return; } parent::resolve(); foreach ($this->envPlaceholders as $env => $placeholders) { if (!isset($this->parameters[$name = strtolower("env($env)")])) { continue; } if (is_numeric($default = $this->parameters[$name])) { $this->parameters[$name] = (string) $default; } elseif (null !== $default && !is_scalar($default)) { throw new RuntimeException(sprintf('The default value of env parameter "%s" must be scalar or null, %s given.', $env, gettype($default))); } } } }