Make config file optional

e2e/no-config-file/expected-output.txt

@@ -0,0 +1,4 @@
+
+
+ [ERROR] No configuration file specified, cannot run Fractor.
+

e2e/run-test.sh

@@ -10,7 +10,12 @@ cd $TESTS_BASE_DIR
 rm -r composer.lock vendor || true
 composer install
 
-for TEST_DIR in typo3-typoscript typo3-xml typo3-yaml
+ALL_TESTS="no-config-file typo3-typoscript typo3-xml typo3-yaml"
+TESTS_TO_RUN=${1:-$ALL_TESTS}
+
+echo "Running tests: " $TESTS_TO_RUN
+
+for TEST_DIR in $TESTS_TO_RUN
 do
     set +x
     echo
@@ -28,7 +33,13 @@ do
     # copy over our fixture to the path that Fractor will run in
     cp -r $TEST_DIR/fixtures/ $TEST_DIR/result/
 
-    ./vendor/bin/fractor process -c $TESTS_BASE_DIR/$TEST_DIR/fractor.php > $TEST_DIR/output.txt
+    CONFIG_FILE=""
+    if [ -f $TESTS_BASE_DIR/$TEST_DIR/fractor.php ]
+    then
+        CONFIG_FILE="-c $TESTS_BASE_DIR/$TEST_DIR/fractor.php"
+    fi
+
+    ./vendor/bin/fractor process $CONFIG_FILE > $TEST_DIR/output.txt
 
     set +x
     echo

packages/fractor/src/Configuration/ConfigurationFactory.php

@@ -23,6 +23,7 @@ public function createFromInput(InputInterface $input): Configuration
         $paths = (array) $this->parameterBag->get(Option::PATHS);
 
         return new Configuration(
+            $this->getConfigurationFile(),
             $this->allowedFileExtensionsResolver->resolve(),
             $paths,
             (array) $this->parameterBag->get(Option::SKIP),
@@ -40,11 +41,21 @@ public function createForTests(array $paths): Configuration
         Assert::allStringNotEmpty($paths, 'No directories given');
 
         return new Configuration(
+            $this->getConfigurationFile(),
             $this->allowedFileExtensionsResolver->resolve(),
             $paths,
             (array) $this->parameterBag->get(Option::SKIP),
             false,
             false
         );
     }
+
+    private function getConfigurationFile(): ?string
+    {
+        $configurationFile = $this->parameterBag->get('fractor_config_file');
+        if ($configurationFile !== null) {
+            Assert::string($configurationFile);
+        }
+        return $configurationFile;
+    }
 }

packages/fractor/src/Configuration/ValueObject/Configuration.php

@@ -17,6 +17,7 @@
      * @param string[] $skip
      */
     public function __construct(
+        private ?string $configurationFile,
         private array $fileExtensions,
         private array $paths,
         private array $skip,
@@ -26,6 +27,11 @@ public function __construct(
         Assert::allStringNotEmpty($this->paths, 'No directories given');
     }
 
+    public function getConfigurationFile(): ?string
+    {
+        return $this->configurationFile;
+    }
+
     /**
      * @return string[]
      */

packages/fractor/src/Console/Command/ProcessCommand.php

@@ -60,12 +60,19 @@ protected function configure(): void
 
     protected function execute(InputInterface $input, OutputInterface $output): int
     {
+        $io = new SymfonyStyle($input, $output);
         $configuration = $this->configurationFactory->createFromInput($input);
+
+        if ($configuration->getConfigurationFile() === null) {
+            $io->error('No configuration file specified, cannot run Fractor.');
+            return Command::FAILURE;
+        }
+
         $processResult = $this->runner->run(new SymfonyConsoleOutput($output), $configuration);
 
         $outputFormat = 'console';
         $outputFormatter = $this->outputFormatterCollector->getByName($outputFormat);
-        $outputFormatter->setSymfonyStyle(new SymfonyStyle($input, $output));
+        $outputFormatter->setSymfonyStyle($io);
         $outputFormatter->report($processResult, $configuration);
 
         return $this->resolveReturnCode($processResult, $configuration);

packages/fractor/src/DependencyInjection/ContainerContainerBuilder.php

@@ -4,6 +4,7 @@
 
 namespace a9f\Fractor\DependencyInjection;
 
+use a9f\Fractor\Configuration\FractorConfiguration;
 use a9f\Fractor\Exception\ShouldNotHappenException;
 use a9f\FractorExtensionInstaller\Generated\InstalledPackages;
 use Symfony\Component\Config\FileLocator;
@@ -78,12 +79,17 @@ private function collectConfigFilesFromExtensions(): array
 
     private function loadFractorConfigFile(string $fractorConfigFile, ContainerBuilder $containerBuilder): void
     {
-        Assert::fileExists($fractorConfigFile);
+        if (! file_exists($fractorConfigFile)) {
+            $callable = (FractorConfiguration::configure());
+            $containerBuilder->setParameter('fractor_config_file', null);
+        } else {
+            $containerBuilder->setParameter('fractor_config_file', $fractorConfigFile);
 
-        $self = $this;
-        $callable = (require $fractorConfigFile);
+            $self = $this;
+            $callable = (require $fractorConfigFile);
 
-        Assert::isCallable($callable);
+            Assert::isCallable($callable);
+        }
         $instanceOf = [];
         /** @var callable(ContainerConfigurator $container): void $callable */
         $callable(new ContainerConfigurator($containerBuilder, new PhpFileLoader($containerBuilder, new FileLocator(