annotate vendor/symfony/dependency-injection/Compiler/RemoveUnusedDefinitionsPass.php @ 19:fa3358dc1485 tip

Add ndrum files
author Chris Cannam
date Wed, 28 Aug 2019 13:14:47 +0100
parents 129ea1e6d783
children
rev   line source
Chris@0 1 <?php
Chris@0 2
Chris@0 3 /*
Chris@0 4 * This file is part of the Symfony package.
Chris@0 5 *
Chris@0 6 * (c) Fabien Potencier <fabien@symfony.com>
Chris@0 7 *
Chris@0 8 * For the full copyright and license information, please view the LICENSE
Chris@0 9 * file that was distributed with this source code.
Chris@0 10 */
Chris@0 11
Chris@0 12 namespace Symfony\Component\DependencyInjection\Compiler;
Chris@0 13
Chris@0 14 use Symfony\Component\DependencyInjection\ContainerBuilder;
Chris@0 15
Chris@0 16 /**
Chris@0 17 * Removes unused service definitions from the container.
Chris@0 18 *
Chris@0 19 * @author Johannes M. Schmitt <schmittjoh@gmail.com>
Chris@0 20 */
Chris@0 21 class RemoveUnusedDefinitionsPass implements RepeatablePassInterface
Chris@0 22 {
Chris@0 23 private $repeatedPass;
Chris@0 24
Chris@0 25 /**
Chris@0 26 * {@inheritdoc}
Chris@0 27 */
Chris@0 28 public function setRepeatedPass(RepeatedPass $repeatedPass)
Chris@0 29 {
Chris@0 30 $this->repeatedPass = $repeatedPass;
Chris@0 31 }
Chris@0 32
Chris@0 33 /**
Chris@0 34 * Processes the ContainerBuilder to remove unused definitions.
Chris@0 35 */
Chris@0 36 public function process(ContainerBuilder $container)
Chris@0 37 {
Chris@14 38 $graph = $container->getCompiler()->getServiceReferenceGraph();
Chris@0 39
Chris@0 40 $hasChanged = false;
Chris@0 41 foreach ($container->getDefinitions() as $id => $definition) {
Chris@14 42 if ($definition->isPublic() || $definition->isPrivate()) {
Chris@0 43 continue;
Chris@0 44 }
Chris@0 45
Chris@0 46 if ($graph->hasNode($id)) {
Chris@0 47 $edges = $graph->getNode($id)->getInEdges();
Chris@17 48 $referencingAliases = [];
Chris@17 49 $sourceIds = [];
Chris@0 50 foreach ($edges as $edge) {
Chris@14 51 if ($edge->isWeak()) {
Chris@14 52 continue;
Chris@14 53 }
Chris@0 54 $node = $edge->getSourceNode();
Chris@0 55 $sourceIds[] = $node->getId();
Chris@0 56
Chris@0 57 if ($node->isAlias()) {
Chris@0 58 $referencingAliases[] = $node->getValue();
Chris@0 59 }
Chris@0 60 }
Chris@17 61 $isReferenced = (\count(array_unique($sourceIds)) - \count($referencingAliases)) > 0;
Chris@0 62 } else {
Chris@17 63 $referencingAliases = [];
Chris@0 64 $isReferenced = false;
Chris@0 65 }
Chris@0 66
Chris@17 67 if (1 === \count($referencingAliases) && false === $isReferenced) {
Chris@0 68 $container->setDefinition((string) reset($referencingAliases), $definition);
Chris@14 69 $definition->setPublic(!$definition->isPrivate());
Chris@14 70 $definition->setPrivate(reset($referencingAliases)->isPrivate());
Chris@0 71 $container->removeDefinition($id);
Chris@14 72 $container->log($this, sprintf('Removed service "%s"; reason: replaces alias %s.', $id, reset($referencingAliases)));
Chris@17 73 } elseif (0 === \count($referencingAliases) && false === $isReferenced) {
Chris@0 74 $container->removeDefinition($id);
Chris@0 75 $container->resolveEnvPlaceholders(serialize($definition));
Chris@14 76 $container->log($this, sprintf('Removed service "%s"; reason: unused.', $id));
Chris@0 77 $hasChanged = true;
Chris@0 78 }
Chris@0 79 }
Chris@0 80
Chris@0 81 if ($hasChanged) {
Chris@0 82 $this->repeatedPass->setRepeat();
Chris@0 83 }
Chris@0 84 }
Chris@0 85 }