Viewing file:  RemoveUnusedDefinitionsPass.php (2.79 KB) -rw-r--r--
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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\DependencyInjection\ContainerBuilder;
use Symfony\Component\DependencyInjection\Reference;
/**
* Removes unused service definitions from the container.
*
* @author Johannes M. Schmitt <schmittjoh@gmail.com>
* @author Nicolas Grekas <p@tchwork.com>
*/
class RemoveUnusedDefinitionsPass extends AbstractRecursivePass
{
private $connectedIds = [];
/**
* Processes the ContainerBuilder to remove unused definitions.
*/
public function process(ContainerBuilder $container)
{
try {
$this->enableExpressionProcessing();
$this->container = $container;
$connectedIds = [];
$aliases = $container->getAliases();
foreach ($aliases as $id => $alias) {
if ($alias->isPublic()) {
$this->connectedIds[] = (string) $aliases[$id];
}
}
foreach ($container->getDefinitions() as $id => $definition) {
if ($definition->isPublic()) {
$connectedIds[$id] = true;
$this->processValue($definition);
}
}
while ($this->connectedIds) {
$ids = $this->connectedIds;
$this->connectedIds = [];
foreach ($ids as $id) {
if (!isset($connectedIds[$id]) && $container->hasDefinition($id)) {
$connectedIds[$id] = true;
$this->processValue($container->getDefinition($id));
}
}
}
foreach ($container->getDefinitions() as $id => $definition) {
if (!isset($connectedIds[$id])) {
$container->removeDefinition($id);
$container->resolveEnvPlaceholders(!$definition->hasErrors() ? serialize($definition) : $definition);
$container->log($this, sprintf('Removed service "%s"; reason: unused.', $id));
}
}
} finally {
$this->container = null;
$this->connectedIds = [];
}
}
/**
* {@inheritdoc}
*/
protected function processValue($value, bool $isRoot = false)
{
if (!$value instanceof Reference) {
return parent::processValue($value, $isRoot);
}
if (ContainerBuilder::IGNORE_ON_UNINITIALIZED_REFERENCE !== $value->getInvalidBehavior()) {
$this->connectedIds[] = (string) $value;
}
return $value;
}
}
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