84 lines
2.7 KiB
PHP
84 lines
2.7 KiB
PHP
<?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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/**
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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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*/
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class RemoveUnusedDefinitionsPass implements RepeatablePassInterface
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{
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private $repeatedPass;
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/**
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* {@inheritdoc}
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*/
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public function setRepeatedPass(RepeatedPass $repeatedPass)
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{
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$this->repeatedPass = $repeatedPass;
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}
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/**
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* Processes the ContainerBuilder to remove unused definitions.
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*
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* @param ContainerBuilder $container
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*/
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public function process(ContainerBuilder $container)
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{
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$graph = $container->getCompiler()->getServiceReferenceGraph();
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$hasChanged = false;
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foreach ($container->getDefinitions() as $id => $definition) {
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if ($definition->isPublic()) {
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continue;
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}
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if ($graph->hasNode($id)) {
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$edges = $graph->getNode($id)->getInEdges();
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$referencingAliases = array();
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$sourceIds = array();
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foreach ($edges as $edge) {
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$node = $edge->getSourceNode();
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$sourceIds[] = $node->getId();
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if ($node->isAlias()) {
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$referencingAliases[] = $node->getValue();
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}
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}
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$isReferenced = (count(array_unique($sourceIds)) - count($referencingAliases)) > 0;
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} else {
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$referencingAliases = array();
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$isReferenced = false;
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}
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if (1 === count($referencingAliases) && false === $isReferenced) {
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$container->setDefinition((string) reset($referencingAliases), $definition);
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$definition->setPublic(true);
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$container->removeDefinition($id);
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$container->log($this, sprintf('Removed service "%s"; reason: replaces alias %s.', $id, reset($referencingAliases)));
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} elseif (0 === count($referencingAliases) && false === $isReferenced) {
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$container->removeDefinition($id);
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$container->resolveEnvPlaceholders(serialize($definition));
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$container->log($this, sprintf('Removed service "%s"; reason: unused.', $id));
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$hasChanged = true;
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}
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}
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if ($hasChanged) {
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$this->repeatedPass->setRepeat();
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}
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}
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}
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