91 lines
2.8 KiB
PHP
91 lines
2.8 KiB
PHP
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<?php
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/*
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* This file is part of the Symfony package.
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*
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* (c) Fabien Potencier <fabien@symfony.com>
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*
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* For the full copyright and license information, please view the LICENSE
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* file that was distributed with this source code.
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*/
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namespace Symfony\Component\DependencyInjection\Compiler;
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use Symfony\Component\DependencyInjection\ContainerBuilder;
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use Symfony\Component\DependencyInjection\Reference;
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/**
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* Removes unused service definitions from the container.
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*
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* @author Johannes M. Schmitt <schmittjoh@gmail.com>
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* @author Nicolas Grekas <p@tchwork.com>
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*/
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class RemoveUnusedDefinitionsPass extends AbstractRecursivePass
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{
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private $connectedIds = [];
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/**
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* Processes the ContainerBuilder to remove unused definitions.
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*/
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public function process(ContainerBuilder $container)
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{
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try {
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$this->enableExpressionProcessing();
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$this->container = $container;
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$connectedIds = [];
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$aliases = $container->getAliases();
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foreach ($aliases as $id => $alias) {
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if ($alias->isPublic()) {
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$this->connectedIds[] = (string) $aliases[$id];
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}
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}
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foreach ($container->getDefinitions() as $id => $definition) {
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if ($definition->isPublic()) {
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$connectedIds[$id] = true;
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$this->processValue($definition);
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}
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}
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while ($this->connectedIds) {
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$ids = $this->connectedIds;
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$this->connectedIds = [];
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foreach ($ids as $id) {
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if (!isset($connectedIds[$id]) && $container->hasDefinition($id)) {
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$connectedIds[$id] = true;
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$this->processValue($container->getDefinition($id));
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}
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}
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}
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foreach ($container->getDefinitions() as $id => $definition) {
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if (!isset($connectedIds[$id])) {
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$container->removeDefinition($id);
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$container->resolveEnvPlaceholders(!$definition->hasErrors() ? serialize($definition) : $definition);
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$container->log($this, sprintf('Removed service "%s"; reason: unused.', $id));
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}
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}
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} finally {
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$this->container = null;
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$this->connectedIds = [];
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}
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}
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/**
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* {@inheritdoc}
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*/
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protected function processValue($value, bool $isRoot = false)
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{
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if (!$value instanceof Reference) {
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return parent::processValue($value, $isRoot);
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}
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if (ContainerBuilder::IGNORE_ON_UNINITIALIZED_REFERENCE !== $value->getInvalidBehavior()) {
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$this->connectedIds[] = (string) $value;
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}
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return $value;
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}
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}
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