Sort of get config to work

src/DependencyInjection/Configuration.php

@@ -0,0 +1,30 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Pcm\IconBundle\DependencyInjection;
+
+use Symfony\Component\Config\Definition\Builder\TreeBuilder;
+use Symfony\Component\Config\Definition\ConfigurationInterface;
+
+class Configuration implements ConfigurationInterface
+{
+    public function getConfigTreeBuilder(): TreeBuilder
+    {
+        $treeBuilder = new TreeBuilder('pcm_icon');
+
+        $treeBuilder->getRootNode()
+            ->children()
+                ->arrayNode('directories')
+                    ->scalarPrototype()
+                        ->end()
+                    ->end()
+                ->arrayNode('palletes')->variablePrototype()->end()
+
+                    ->end()
+            ->end()
+        ;
+
+        return $treeBuilder;
+    }
+}

src/DependencyInjection/PcmIconExtension.php

@@ -0,0 +1,32 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Pcm\IconBundle\DependencyInjection;
+
+use Pcm\IconBundle\DependencyInjection\Configuration;
+use Symfony\Component\Config\FileLocator;
+use Symfony\Component\DependencyInjection\ContainerBuilder;
+use Symfony\Component\DependencyInjection\Extension\Extension;
+use Symfony\Component\DependencyInjection\Loader\YamlFileLoader;
+
+class PcmIconExtension extends Extension
+{
+    /**
+     * {@inheritdoc}
+     */
+    public function load(array $configs, ContainerBuilder $container): void
+    {
+        $loader = new YamlFileLoader($container, new FileLocator(__DIR__.'/../../config'));
+        $loader->load('services.yaml');
+
+        $configuration = new Configuration();
+        $config = $this->processConfiguration($configuration, $configs);
+
+        $definition = $container->getDefinition('pcm_icon.icon_extension');
+
+        $definition->replaceArgument('$directories', $config['directories']);
+        $definition->replaceArgument('$palletes', $config['palletes']);
+        dump($configs);
+    }
+}

src/PcmIconBundle.php

@@ -4,16 +4,21 @@ declare(strict_types=1);
 
 namespace Pcm\IconBundle;
 
-use Symfony\Component\Config\FileLocator;
+use Pcm\IconBundle\DependencyInjection\PcmIconExtension;
+use Symfony\Component\Config\Definition\Configurator\DefinitionConfigurator;
 use Symfony\Component\DependencyInjection\ContainerBuilder;
+use Symfony\Component\DependencyInjection\Extension\ExtensionInterface;
 use Symfony\Component\DependencyInjection\Loader\Configurator\ContainerConfigurator;
-use Symfony\Component\DependencyInjection\Loader\YamlFileLoader;
 use Symfony\Component\HttpKernel\Bundle\AbstractBundle;
 
-class PcmIconBundle extends AbstractBundle {
-    public function loadExtension(array $config, ContainerConfigurator $container, ContainerBuilder $builder): void
+class PcmIconBundle extends AbstractBundle
+{
+    public function getContainerExtension(): ?ExtensionInterface
     {
-        $loader = new YamlFileLoader($builder, new FileLocator(__DIR__.'/../config/'));
-        $loader->load('services.yml');
+        if (null === $this->extension) {
+            $this->extension = new PcmIconExtension();
+        }
+
+        return $this->extension;
     }
 }

src/Twig/Functions/IconExtension.php

@@ -17,7 +17,9 @@ final class IconExtension extends AbstractExtension
         'size' => self::DEFAULT_SIZE
     ];
 
-    public function __construct(private array $directories) {}
+    public function __construct(private array $directories, private array $palletes) {
+        dump($this->directories);
+    }
 
     /**
      * @inheritDoc