Switched back to standalone application and renamed package.

src/ConfigGeneratorBundle.php

-<?php
-declare(strict_types=1);
-
-namespace HHIT\ConfigGeneratorBundle;
-
-use Symfony\Component\HttpKernel\Bundle\Bundle;
-
-class ConfigGeneratorBundle extends Bundle
-{
-}

src/ContaoManager/ConfigGeneratorPlugin.php

-<?php
-declare(strict_types=1);
-
-namespace HHIT\ConfigGeneratorBundle\ContaoManager;
-
-use Contao\ManagerPlugin\Bundle\BundlePluginInterface;
-use Contao\ManagerPlugin\Bundle\Config\BundleConfig;
-use Contao\ManagerPlugin\Bundle\Parser\ParserInterface;
-use HHIT\ConfigGeneratorBundle\ConfigGeneratorBundle;
-
-class ConfigGeneratorPlugin implements BundlePluginInterface
-{
-    public function getBundles(ParserInterface $parser)
-    {
-        return [BundleConfig::create(ConfigGeneratorBundle::class)];
-    }
-}

src/DependencyInjection/ConfigGeneratorExtension.php

-<?php
-declare(strict_types=1);
-
-namespace HHIT\ConfigGeneratorBundle\DependencyInjection;
-
-use Symfony\Component\Config\FileLocator;
-use Symfony\Component\DependencyInjection\ContainerBuilder;
-use Symfony\Component\DependencyInjection\Extension\Extension;
-use Symfony\Component\DependencyInjection\Loader\YamlFileLoader;
-
-class ConfigGeneratorExtension extends Extension
-{
-    public function load(array $configs, ContainerBuilder $container)
-    {
-        $loader = new YamlFileLoader(
-            $container,
-            new FileLocator(__DIR__ . '/../Resources/config')
-        );
-
-        $loader->load('services.yaml');
-    }
-}

src/Generator/Compiler/Compiler.php

 <?php
 declare(strict_types=1);
 
-namespace HHIT\ConfigGeneratorBundle\Generator\Compiler;
+namespace HHIT\ConfigGenerator\Generator\Compiler;
 
-use HHIT\ConfigGeneratorBundle\Generator\IO\File;
-use HHIT\ConfigGeneratorBundle\Generator\IO\FileReader;
-use HHIT\ConfigGeneratorBundle\Generator\Values\ValuesLoader;
+use HHIT\ConfigGenerator\Generator\IO\File;
+use HHIT\ConfigGenerator\Generator\IO\FileReader;
+use HHIT\ConfigGenerator\Generator\Values\ValuesLoader;
 use LightnCandy\LightnCandy;
 
 class Compiler extends FileReader

src/Generator/Definition/Definition.php

 <?php
 declare(strict_types=1);
 
-namespace HHIT\ConfigGeneratorBundle\Generator\Definition;
+namespace HHIT\ConfigGenerator\Generator\Definition;
 
-use HHIT\ConfigGeneratorBundle\Generator\IO\File;
-use HHIT\ConfigGeneratorBundle\Generator\IO\Path;
+use HHIT\ConfigGenerator\Generator\IO\File;
+use HHIT\ConfigGenerator\Generator\IO\Path;
 
 class Definition
 {

src/Generator/Definition/DefinitionReader.php

 <?php
 declare(strict_types=1);
 
-namespace HHIT\ConfigGeneratorBundle\Generator\Definition;
+namespace HHIT\ConfigGenerator\Generator\Definition;
 
-use HHIT\ConfigGeneratorBundle\Generator\IO\File;
-use HHIT\ConfigGeneratorBundle\Generator\IO\JsonReader;
-use HHIT\ConfigGeneratorBundle\Generator\IO\Path;
-use HHIT\ConfigGeneratorBundle\Generator\IO\ReaderFactory;
-use HHIT\ConfigGeneratorBundle\Generator\StringUtils;
+use HHIT\ConfigGenerator\Generator\IO\File;
+use HHIT\ConfigGenerator\Generator\IO\JsonReader;
+use HHIT\ConfigGenerator\Generator\IO\Path;
+use HHIT\ConfigGenerator\Generator\IO\ReaderFactory;
+use HHIT\ConfigGenerator\Generator\StringUtils;
 
 class DefinitionReader
 {

src/Generator/Factory.php

+<?php
+declare(strict_types=1);
+
+namespace HHIT\ConfigGenerator\Generator;
+
+use HHIT\ConfigGenerator\Generator\Definition\DefinitionReader;
+use HHIT\ConfigGenerator\Generator\Secrets\SecretProviderFactory;
+use HHIT\ConfigGenerator\Generator\Secrets\SymfonyVaultSecretProvider;
+use HHIT\ConfigGenerator\Generator\Validator\ValidatorFactory;
+use HHIT\ConfigGenerator\Generator\Values\ValuesLoaderFactory;
+use Symfony\Bundle\FrameworkBundle\Secrets\DotenvVault;
+use Symfony\Bundle\FrameworkBundle\Secrets\SodiumVault;
+use Symfony\Component\Dotenv\Dotenv;
+
+class Factory
+{
+
+    private string $projectDir;
+    private string $env;
+
+    public function __construct(string $projectDir, string $env = 'dev')
+    {
+        $this->projectDir = $projectDir;
+        $this->env = $env;
+    }
+
+    private function createDefinitionReader(): DefinitionReader
+    {
+        return new DefinitionReader($this->projectDir);
+    }
+
+    function createSodiumVault(): SodiumVault
+    {
+        return $this->createSodiumVaultInternal($this->projectDir . '/config/secrets/' . $this->env);
+    }
+
+    private function createSodiumVaultInternal(string $secretsDir, $decryptionKey = null): SodiumVault
+    {
+        return new SodiumVault($secretsDir, $decryptionKey);
+    }
+
+    private function createDotenvVault(string $dotenvFile): DotenvVault
+    {
+        return new DotenvVault($dotenvFile);
+    }
+
+    private function createSymfonyVaultSecretProvider(): SymfonyVaultSecretProvider
+    {
+        return new SymfonyVaultSecretProvider(
+            $this->createSodiumVault(),
+            $this->createDotenvVault($this->projectDir . '/.env')
+        );
+    }
+
+    private function createSecretProviderFactory(): SecretProviderFactory
+    {
+        return new SecretProviderFactory($this->createSymfonyVaultSecretProvider());
+    }
+
+    private function createValuesLoaderFactory(): ValuesLoaderFactory
+    {
+        return new ValuesLoaderFactory($this->createSecretProviderFactory());
+    }
+
+    private function createValidatorFactory(): ValidatorFactory
+    {
+        return new ValidatorFactory();
+    }
+
+    function createGenerator(): Generator
+    {
+        return new Generator(
+            $this->createDefinitionReader(),
+            $this->createValuesLoaderFactory(),
+            $this->createValidatorFactory(),
+        );
+    }
+
+    function bootEnv()
+    {
+        if (is_array($env = @include $this->projectDir . '/.env.local.php') && (!isset($env['APP_ENV']) || ($_SERVER['APP_ENV'] ?? $_ENV['APP_ENV'] ?? $env['APP_ENV']) === $env['APP_ENV'])) {
+            (new Dotenv(false))->populate($env);
+        } else {
+            (new Dotenv(false))->loadEnv($this->projectDir . '/.env');
+        }
+    }
+}

src/Generator/Generator.php

 <?php
 declare(strict_types=1);
 
-namespace HHIT\ConfigGeneratorBundle\Generator;
+namespace HHIT\ConfigGenerator\Generator;
 
-use HHIT\ConfigGeneratorBundle\Generator\Compiler\Compiler;
-use HHIT\ConfigGeneratorBundle\Generator\Definition\DefinitionReader;
-use HHIT\ConfigGeneratorBundle\Generator\IO\FileWriter;
-use HHIT\ConfigGeneratorBundle\Generator\Definition\Definition;
-use HHIT\ConfigGeneratorBundle\Generator\Validator\ValidationException;
-use HHIT\ConfigGeneratorBundle\Generator\Validator\ValidatorFactory;
-use HHIT\ConfigGeneratorBundle\Generator\Values\ValuesLoaderFactory;
+use HHIT\ConfigGenerator\Generator\Compiler\Compiler;
+use HHIT\ConfigGenerator\Generator\Definition\DefinitionReader;
+use HHIT\ConfigGenerator\Generator\IO\FileWriter;
+use HHIT\ConfigGenerator\Generator\Definition\Definition;
+use HHIT\ConfigGenerator\Generator\Validator\ValidationException;
+use HHIT\ConfigGenerator\Generator\Validator\ValidatorFactory;
+use HHIT\ConfigGenerator\Generator\Values\ValuesLoaderFactory;
 use Symfony\Component\Console\Output\OutputInterface;
 
 class Generator
@@ -39,7 +39,7 @@ class Generator
             /**
              * @var $definition Definition
              */
-            $this->writeln($output, "<info>Processing configuration {$definition->getId()}</info>");
+            $this->writeln($output, "<info>- processing {$definition->getId()}</info>");
 
             try {
                 $valuesLoader = $this->valuesLoaderFactory->create($definition->getValuesFile(), $vaultType);
@@ -50,14 +50,15 @@ class Generator
                     $definition->getDestinationFile()->parent(false);
                     $writer = new FileWriter($definition->getDestinationFile());
                     $writer->write($compiler->compile(), $overwrite);
+                    $this->writeln($output, "<info>-- configuration written to {$definition->getDestinationFile()->asString()}</info>");
                     $success[] = true;
                 } catch (ValidationException $ve) {
-                    $this->writeln($output, "<error>generated content for {$definition->getId()} is invalid: {$ve->getMessage()}</error>");
+                    $this->writeln($output, "<error>== generated content for {$definition->getId()} is invalid: {$ve->getMessage()}</error>");
                     throw $ve;
                 }
             } catch (\Throwable $t) {
                 if (!$t instanceof ValidationException) {
-                    $this->writeln($output, "<error>generating configuration file {$definition->getId()} failed: {$t->getMessage()}</error>");
+                    $this->writeln($output, "<error>== generating configuration file {$definition->getId()} failed: {$t->getMessage()}</error>");
                 }
                 $success[] = false;
             }

src/Generator/IO/Directory.php

 <?php
 declare(strict_types=1);
 
-namespace HHIT\ConfigGeneratorBundle\Generator\IO;
+namespace HHIT\ConfigGenerator\Generator\IO;
 
 class Directory extends Path
 {

src/Generator/IO/File.php

 <?php
 declare(strict_types=1);
 
-namespace HHIT\ConfigGeneratorBundle\Generator\IO;
+namespace HHIT\ConfigGenerator\Generator\IO;
 
 class File extends Path
 {

src/Generator/IO/FileReader.php

 <?php
 declare(strict_types=1);
 
-namespace HHIT\ConfigGeneratorBundle\Generator\IO;
+namespace HHIT\ConfigGenerator\Generator\IO;
 
 class FileReader
 {

src/Generator/IO/FileWriter.php

 <?php
 declare(strict_types=1);
 
-namespace HHIT\ConfigGeneratorBundle\Generator\IO;
+namespace HHIT\ConfigGenerator\Generator\IO;
 
 class FileWriter
 {

src/Generator/IO/JsonReader.php

 <?php
 declare(strict_types=1);
 
-namespace HHIT\ConfigGeneratorBundle\Generator\IO;
+namespace HHIT\ConfigGenerator\Generator\IO;
 
 class JsonReader extends FileReader
 {

src/Generator/IO/Path.php

 <?php
 declare(strict_types=1);
 
-namespace HHIT\ConfigGeneratorBundle\Generator\IO;
+namespace HHIT\ConfigGenerator\Generator\IO;
 
-use HHIT\ConfigGeneratorBundle\Generator\StringUtils;
+use HHIT\ConfigGenerator\Generator\StringUtils;
 
 abstract class Path
 {

src/Generator/Secrets/SecretProviderFactory.php

 <?php
 declare(strict_types=1);
 
-namespace HHIT\ConfigGeneratorBundle\Generator\Secrets;
+namespace HHIT\ConfigGenerator\Generator\Secrets;
 
 class SecretProviderFactory
 {

src/Generator/Secrets/SecretProviderInterface.php

 <?php
 declare(strict_types=1);
 
-namespace HHIT\ConfigGeneratorBundle\Generator\Secrets;
+namespace HHIT\ConfigGenerator\Generator\Secrets;
 
 interface SecretProviderInterface
 {

src/Generator/Secrets/SymfonyVaultSecretProvider.php

 <?php
 declare(strict_types=1);
 
-namespace HHIT\ConfigGeneratorBundle\Generator\Secrets;
+namespace HHIT\ConfigGenerator\Generator\Secrets;
 
 use Symfony\Bundle\FrameworkBundle\Secrets\DotenvVault;
 use Symfony\Bundle\FrameworkBundle\Secrets\SodiumVault;

src/Generator/StringUtils.php

 <?php
 declare(strict_types=1);
 
-namespace HHIT\ConfigGeneratorBundle\Generator;
+namespace HHIT\ConfigGenerator\Generator;
 
 class StringUtils
 {

src/Generator/Validator/JSONValidator.php

 <?php
 declare(strict_types=1);
 
-namespace HHIT\ConfigGeneratorBundle\Generator\Validator;
+namespace HHIT\ConfigGenerator\Generator\Validator;
 
 class JSONValidator implements ValidatorInterface
 {

src/Generator/Validator/ValidationException.php

 <?php
 declare(strict_types=1);
 
-namespace HHIT\ConfigGeneratorBundle\Generator\Validator;
+namespace HHIT\ConfigGenerator\Generator\Validator;
 
 use Throwable;