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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\Argument\ArgumentInterface;
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use Symfony\Component\DependencyInjection\ContainerBuilder;
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use Symfony\Component\DependencyInjection\Definition;
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use Symfony\Component\DependencyInjection\Exception\ServiceCircularReferenceException;
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use Symfony\Component\DependencyInjection\Reference;
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/**
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* Inline service definitions where this is possible.
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*
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* @author Johannes M. Schmitt <schmittjoh@gmail.com>
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*/
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class InlineServiceDefinitionsPass extends AbstractRecursivePass
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{
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private $analyzingPass;
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private $cloningIds = [];
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private $connectedIds = [];
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private $notInlinedIds = [];
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private $inlinedIds = [];
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private $notInlinableIds = [];
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private $graph;
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public function __construct(AnalyzeServiceReferencesPass $analyzingPass = null)
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{
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$this->analyzingPass = $analyzingPass;
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}
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public function process(ContainerBuilder $container)
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{
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$this->container = $container;
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if ($this->analyzingPass) {
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$analyzedContainer = new ContainerBuilder();
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$analyzedContainer->setAliases($container->getAliases());
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$analyzedContainer->setDefinitions($container->getDefinitions());
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foreach ($container->getExpressionLanguageProviders() as $provider) {
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$analyzedContainer->addExpressionLanguageProvider($provider);
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}
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} else {
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$analyzedContainer = $container;
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}
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try {
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$remainingInlinedIds = [];
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$this->connectedIds = $this->notInlinedIds = $container->getDefinitions();
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do {
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if ($this->analyzingPass) {
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$analyzedContainer->setDefinitions(array_intersect_key($analyzedContainer->getDefinitions(), $this->connectedIds));
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$this->analyzingPass->process($analyzedContainer);
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}
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$this->graph = $analyzedContainer->getCompiler()->getServiceReferenceGraph();
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$notInlinedIds = $this->notInlinedIds;
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$this->connectedIds = $this->notInlinedIds = $this->inlinedIds = [];
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foreach ($analyzedContainer->getDefinitions() as $id => $definition) {
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if (!$this->graph->hasNode($id)) {
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continue;
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}
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foreach ($this->graph->getNode($id)->getOutEdges() as $edge) {
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if (isset($notInlinedIds[$edge->getSourceNode()->getId()])) {
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$this->currentId = $id;
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$this->processValue($definition, true);
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break;
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}
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}
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}
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foreach ($this->inlinedIds as $id => $isPublicOrNotShared) {
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if ($isPublicOrNotShared) {
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$remainingInlinedIds[$id] = $id;
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} else {
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$container->removeDefinition($id);
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$analyzedContainer->removeDefinition($id);
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}
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}
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} while ($this->inlinedIds && $this->analyzingPass);
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foreach ($remainingInlinedIds as $id) {
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if (isset($this->notInlinableIds[$id])) {
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continue;
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}
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$definition = $container->getDefinition($id);
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if (!$definition->isShared() && !$definition->isPublic()) {
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$container->removeDefinition($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 = $this->notInlinedIds = $this->inlinedIds = [];
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$this->notInlinableIds = [];
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$this->graph = null;
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}
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}
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/**
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* {@inheritdoc}
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*/
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protected function processValue($value, bool $isRoot = false)
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{
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if ($value instanceof ArgumentInterface) {
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// References found in ArgumentInterface::getValues() are not inlineable
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return $value;
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}
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if ($value instanceof Definition && $this->cloningIds) {
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if ($value->isShared()) {
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return $value;
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}
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$value = clone $value;
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}
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if (!$value instanceof Reference) {
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return parent::processValue($value, $isRoot);
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} elseif (!$this->container->hasDefinition($id = (string) $value)) {
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return $value;
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}
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$definition = $this->container->getDefinition($id);
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if (!$this->isInlineableDefinition($id, $definition)) {
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$this->notInlinableIds[$id] = true;
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return $value;
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}
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$this->container->log($this, sprintf('Inlined service "%s" to "%s".', $id, $this->currentId));
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$this->inlinedIds[$id] = $definition->isPublic() || !$definition->isShared();
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$this->notInlinedIds[$this->currentId] = true;
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if ($definition->isShared()) {
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return $definition;
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}
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if (isset($this->cloningIds[$id])) {
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$ids = array_keys($this->cloningIds);
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$ids[] = $id;
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throw new ServiceCircularReferenceException($id, \array_slice($ids, array_search($id, $ids)));
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}
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$this->cloningIds[$id] = true;
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try {
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return $this->processValue($definition);
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} finally {
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unset($this->cloningIds[$id]);
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}
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}
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/**
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* Checks if the definition is inlineable.
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*/
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private function isInlineableDefinition(string $id, Definition $definition): bool
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{
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if ($definition->hasErrors() || $definition->isDeprecated() || $definition->isLazy() || $definition->isSynthetic() || $definition->hasTag('container.do_not_inline')) {
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return false;
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}
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if (!$definition->isShared()) {
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if (!$this->graph->hasNode($id)) {
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return true;
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}
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foreach ($this->graph->getNode($id)->getInEdges() as $edge) {
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$srcId = $edge->getSourceNode()->getId();
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$this->connectedIds[$srcId] = true;
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if ($edge->isWeak() || $edge->isLazy()) {
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return !$this->connectedIds[$id] = true;
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}
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}
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return true;
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}
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if ($definition->isPublic()) {
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return false;
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}
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if (!$this->graph->hasNode($id)) {
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return true;
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}
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if ($this->currentId == $id) {
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return false;
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}
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$this->connectedIds[$id] = true;
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$srcIds = [];
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$srcCount = 0;
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foreach ($this->graph->getNode($id)->getInEdges() as $edge) {
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$srcId = $edge->getSourceNode()->getId();
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$this->connectedIds[$srcId] = true;
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if ($edge->isWeak() || $edge->isLazy()) {
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return false;
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}
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$srcIds[$srcId] = true;
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++$srcCount;
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}
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if (1 !== \count($srcIds)) {
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$this->notInlinedIds[$id] = true;
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return false;
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}
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if ($srcCount > 1 && \is_array($factory = $definition->getFactory()) && ($factory[0] instanceof Reference || $factory[0] instanceof Definition)) {
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return false;
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}
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return $this->container->getDefinition($srcId)->isShared();
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}
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}
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