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<?php
/*
* This file is part of the Symfony package.
*
* (c) Fabien Potencier <fabien@symfony.com>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Symfony\Component\DependencyInjection\Compiler;
use Symfony\Component\Config\Definition\BaseNode;
use Symfony\Component\DependencyInjection\ContainerBuilder;
use Symfony\Component\DependencyInjection\Exception\LogicException;
use Symfony\Component\DependencyInjection\Exception\RuntimeException;
use Symfony\Component\DependencyInjection\Extension\ConfigurationExtensionInterface;
use Symfony\Component\DependencyInjection\Extension\Extension;
use Symfony\Component\DependencyInjection\Extension\ExtensionInterface;
use Symfony\Component\DependencyInjection\Extension\PrependExtensionInterface;
use Symfony\Component\DependencyInjection\ParameterBag\EnvPlaceholderParameterBag;
use Symfony\Component\DependencyInjection\ParameterBag\ParameterBagInterface;
/**
* Merges extension configs into the container builder.
*
* @author Fabien Potencier <fabien@symfony.com>
*/
class MergeExtensionConfigurationPass implements CompilerPassInterface
{
/**
* {@inheritdoc}
*/
public function process(ContainerBuilder $container)
{
$parameters = $container->getParameterBag()->all();
$definitions = $container->getDefinitions();
$aliases = $container->getAliases();
$exprLangProviders = $container->getExpressionLanguageProviders();
$configAvailable = class_exists(BaseNode::class);
foreach ($container->getExtensions() as $extension) {
if ($extension instanceof PrependExtensionInterface) {
$extension->prepend($container);
}
}
foreach ($container->getExtensions() as $name => $extension) {
if (!$config = $container->getExtensionConfig($name)) {
// this extension was not called
continue;
}
$resolvingBag = $container->getParameterBag();
if ($resolvingBag instanceof EnvPlaceholderParameterBag && $extension instanceof Extension) {
// create a dedicated bag so that we can track env vars per-extension
$resolvingBag = new MergeExtensionConfigurationParameterBag($resolvingBag);
if ($configAvailable) {
BaseNode::setPlaceholderUniquePrefix($resolvingBag->getEnvPlaceholderUniquePrefix());
}
}
$config = $resolvingBag->resolveValue($config);
try {
$tmpContainer = new MergeExtensionConfigurationContainerBuilder($extension, $resolvingBag);
$tmpContainer->setResourceTracking($container->isTrackingResources());
$tmpContainer->addObjectResource($extension);
if ($extension instanceof ConfigurationExtensionInterface && null !== $configuration = $extension->getConfiguration($config, $tmpContainer)) {
$tmpContainer->addObjectResource($configuration);
}
foreach ($exprLangProviders as $provider) {
$tmpContainer->addExpressionLanguageProvider($provider);
}
$extension->load($config, $tmpContainer);
} catch (\Exception $e) {
if ($resolvingBag instanceof MergeExtensionConfigurationParameterBag) {
$container->getParameterBag()->mergeEnvPlaceholders($resolvingBag);
}
throw $e;
} finally {
if ($configAvailable) {
BaseNode::resetPlaceholders();
}
}
if ($resolvingBag instanceof MergeExtensionConfigurationParameterBag) {
// don't keep track of env vars that are *overridden* when configs are merged
$resolvingBag->freezeAfterProcessing($extension, $tmpContainer);
}
$container->merge($tmpContainer);
$container->getParameterBag()->add($parameters);
}
$container->addDefinitions($definitions);
$container->addAliases($aliases);
}
}
/**
* @internal
*/
class MergeExtensionConfigurationParameterBag extends EnvPlaceholderParameterBag
{
private $processedEnvPlaceholders;
public function __construct(parent $parameterBag)
{
parent::__construct($parameterBag->all());
$this->mergeEnvPlaceholders($parameterBag);
}
public function freezeAfterProcessing(Extension $extension, ContainerBuilder $container)
{
if (!$config = $extension->getProcessedConfigs()) {
// Extension::processConfiguration() wasn't called, we cannot know how configs were merged
return;
}
$this->processedEnvPlaceholders = [];
// serialize config and container to catch env vars nested in object graphs
$config = serialize($config).serialize($container->getDefinitions()).serialize($container->getAliases()).serialize($container->getParameterBag()->all());
foreach (parent::getEnvPlaceholders() as $env => $placeholders) {
foreach ($placeholders as $placeholder) {
if (false !== stripos($config, $placeholder)) {
$this->processedEnvPlaceholders[$env] = $placeholders;
break;
}
}
}
}
/**
* {@inheritdoc}
*/
public function getEnvPlaceholders()
{
return null !== $this->processedEnvPlaceholders ? $this->processedEnvPlaceholders : parent::getEnvPlaceholders();
}
public function getUnusedEnvPlaceholders(): array
{
return null === $this->processedEnvPlaceholders ? [] : array_diff_key(parent::getEnvPlaceholders(), $this->processedEnvPlaceholders);
}
}
/**
* A container builder preventing using methods that wouldn't have any effect from extensions.
*
* @internal
*/
class MergeExtensionConfigurationContainerBuilder extends ContainerBuilder
{
private $extensionClass;
public function __construct(ExtensionInterface $extension, ParameterBagInterface $parameterBag = null)
{
parent::__construct($parameterBag);
$this->extensionClass = \get_class($extension);
}
/**
* {@inheritdoc}
*/
public function addCompilerPass(CompilerPassInterface $pass, $type = PassConfig::TYPE_BEFORE_OPTIMIZATION, int $priority = 0)
{
throw new LogicException(sprintf('You cannot add compiler pass "%s" from extension "%s". Compiler passes must be registered before the container is compiled.', \get_class($pass), $this->extensionClass));
}
/**
* {@inheritdoc}
*/
public function registerExtension(ExtensionInterface $extension)
{
throw new LogicException(sprintf('You cannot register extension "%s" from "%s". Extensions must be registered before the container is compiled.', \get_class($extension), $this->extensionClass));
}
/**
* {@inheritdoc}
*/
public function compile(bool $resolveEnvPlaceholders = false)
{
throw new LogicException(sprintf('Cannot compile the container in extension "%s".', $this->extensionClass));
}
/**
* {@inheritdoc}
*/
public function resolveEnvPlaceholders($value, $format = null, array &$usedEnvs = null)
{
if (true !== $format || !\is_string($value)) {
return parent::resolveEnvPlaceholders($value, $format, $usedEnvs);
}
$bag = $this->getParameterBag();
$value = $bag->resolveValue($value);
foreach ($bag->getEnvPlaceholders() as $env => $placeholders) {
if (false === strpos($env, ':')) {
continue;
}
foreach ($placeholders as $placeholder) {
if (false !== stripos($value, $placeholder)) {
throw new RuntimeException(sprintf('Using a cast in "env(%s)" is incompatible with resolution at compile time in "%s". The logic in the extension should be moved to a compiler pass, or an env parameter with no cast should be used instead.', $env, $this->extensionClass));
}
}
}
return parent::resolveEnvPlaceholders($value, $format, $usedEnvs);
}
}
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