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                <?php  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                /*  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * (c) Kévin Dunglas <[email protected]>  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 *  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * This source file is subject to the MIT license that is bundled  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * with this source code in the file LICENSE.  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                namespace Dunglas\ActionBundle\DependencyInjection;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                use Symfony\Component\Config\Definition\Builder\TreeBuilder;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                use Symfony\Component\Config\Definition\ConfigurationInterface;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                use Symfony\Component\Console\Command\Command;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                use Symfony\Component\EventDispatcher\EventSubscriberInterface;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * {@inheritdoc} | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 *  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * @author Kévin Dunglas <[email protected]>  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                class Configuration implements ConfigurationInterface  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * {@inheritdoc} | 
            
            
                                                                                                            
                                                                
            
                                    
            
            
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                     */  | 
            
            
                                                        
            
                                    
            
            
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                    public function getConfigTreeBuilder()  | 
            
            
                                                        
            
                                    
            
            
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                    { | 
            
            
                                                        
            
                                    
            
            
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                        $treeBuilder = new TreeBuilder();  | 
            
            
                                                        
            
                                    
            
            
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                        $treeBuilder->root('dunglas_action') | 
            
            
                                                        
            
                                    
            
            
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                            ->fixXmlConfig('directory', 'directories') | 
            
            
                                                        
            
                                    
            
            
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                            ->children()  | 
            
            
                                                        
            
                                    
            
            
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                                ->arrayNode('directories') | 
            
            
                                                        
            
                                    
            
            
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                                    ->info('List of directories relative to the kernel root directory containing classes.') | 
            
            
                                                        
            
                                    
            
            
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                                    ->useAttributeAsKey('prefix') | 
            
            
                                                        
            
                                    
            
            
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                                    ->prototype('array') | 
            
            
                                                        
            
                                    
            
            
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                                        ->prototype('scalar')->end() | 
            
            
                                                        
            
                                    
            
            
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                                    ->end()  | 
            
            
                                                        
            
                                    
            
            
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                                    ->defaultValue([  | 
            
            
                                                        
            
                                    
            
            
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                                        'controller' => ['../src/*Bundle/Controller', '../src/*Bundle/Action'],  | 
            
            
                                                        
            
                                    
            
            
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                                        'command' => ['../src/*Bundle/Command'],  | 
            
            
                                                        
            
                                    
            
            
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                                        'event_subscriber' => ['../src/*Bundle/EventSubscriber'],  | 
            
            
                                                        
            
                                    
            
            
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                                    ])  | 
            
            
                                                        
            
                                    
            
            
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                                ->end()  | 
            
            
                                                        
            
                                    
            
            
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                                ->arrayNode('tags') | 
            
            
                                                        
            
                                    
            
            
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                                    ->info('List of tags to add when implementing the corresponding class.') | 
            
            
                                                        
            
                                    
            
            
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                                    ->useAttributeAsKey('class') | 
            
            
                                                        
            
                                    
            
            
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                                    ->prototype('array') | 
            
            
                                                        
            
                                    
            
            
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                                        // Converts 'console.command' to ['console.command']  | 
            
                            
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                                        ->beforeNormalization()->ifString()->then(function ($v) { return [$v]; })->end() | 
            
            
                                                        
            
                                    
            
            
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                                        ->prototype('array') | 
            
            
                                                        
            
                                    
            
            
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                                            // Converts 'console.command' to ['console.command', []]  | 
            
                            
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                                            ->beforeNormalization()->ifString()->then(function ($v) { return [$v, []]; })->end() | 
            
            
                                                        
            
                                    
            
            
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                                            ->validate()  | 
            
            
                                                        
            
                                    
            
            
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                                                ->ifTrue(function ($v) { | 
            
            
                                                        
            
                                    
            
            
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                                                    return count($v) !== 2 || !is_string($v[0]) || !is_array($v[1]);  | 
            
            
                                                        
            
                                    
            
            
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                                                })  | 
            
            
                                                        
            
                                    
            
            
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                                                ->thenInvalid('Invalid tag format. They must be as following: [\'console.command\', [\'foo\' => \'bar\']]') | 
            
            
                                                        
            
                                    
            
            
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                                            ->end()  | 
            
            
                                                        
            
                                    
            
            
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                                            ->prototype('variable')->end() | 
            
            
                                                        
            
                                    
            
            
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                                        ->end()  | 
            
            
                                                        
            
                                    
            
            
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                                    ->end()  | 
            
            
                                                        
            
                                    
            
            
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                                    ->defaultValue([  | 
            
            
                                                        
            
                                    
            
            
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                                        Command::class => [['console.command', []]],  | 
            
            
                                                        
            
                                    
            
            
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                                        EventSubscriberInterface::class => [['kernel.event_subscriber', []]],  | 
            
            
                                                        
            
                                    
            
            
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                                    ])  | 
            
            
                                                        
            
                                    
            
            
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                                ->end()  | 
            
            
                                                        
            
                                    
            
            
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                            ->end()  | 
            
            
                                                        
            
                                    
            
            
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                        ->end();  | 
            
            
                                                        
            
                                    
            
            
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                        return $treeBuilder;  | 
            
            
                                                        
            
                                    
            
            
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                    }  | 
            
            
                                                        
            
                                    
            
            
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                }  | 
            
            
                                                        
            
                                    
            
            
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Sometimes obsolete code just ends up commented out instead of removed. In this case it is better to remove the code once you have checked you do not need it.
The code might also have been commented out for debugging purposes. In this case it is vital that someone uncomments it again or your project may behave in very unexpected ways in production.
This check looks for comments that seem to be mostly valid code and reports them.