[DX] check invalid config arguments

.travis.yml

@@ -47,7 +47,7 @@ script:
       if [[ $RUN_RECTOR == true ]]; then
           bin/rector process src --set symfony40 --dry-run
           composer docs
-          php bin/check_class_existance_in_yaml_configs.php
+          php bin/check_services_in_yaml_configs.php
       fi
 
     # Eat your own dog food

bin/check_services_in_yaml_configs.php

@@ -0,0 +1,127 @@
+<?php declare(strict_types=1);
+
+use Nette\Utils\Strings;
+use Rector\Exception\ShouldNotHappenException;
+use Rector\NodeTypeResolver\ClassExistenceStaticHelper;
+use Symfony\Component\Finder\Finder;
+use Symfony\Component\Finder\SplFileInfo;
+use Symfony\Component\Yaml\Yaml;
+
+require __DIR__ . '/../vendor/autoload.php';
+
+$yamlConfigFileProvider = new YamlConfigFileProvider();
+$serviceConfigurationValidator = new ServiceConfigurationValidator();
+
+foreach ($yamlConfigFileProvider->provider() as $configFileInfo) {
+    $yamlContent = Yaml::parseFile($configFileInfo->getRealPath());
+    if (! isset($yamlContent['services'])) {
+        continue;
+    }
+
+    foreach ($yamlContent['services'] as $service => $serviceConfiguration) {
+        // configuration → skip
+        if (Strings::startsWith($service, '_')) {
+            continue;
+        }
+
+        // autodiscovery → skip
+        if (Strings::endsWith($service, '\\')) {
+            continue;
+        }
+
+        if (! ClassExistenceStaticHelper::doesClassLikeExist($service)) {
+            throw new ShouldNotHappenException(sprintf(
+                'Service "%s" from config "%s" was not found. Check if it really exists or is even autoload, please',
+                $service,
+                $configFileInfo->getRealPath()
+            ));
+        }
+
+        $serviceConfigurationValidator->validate($service, $serviceConfiguration, $configFileInfo);
+    }
+}
+
+
+class YamlConfigFileProvider
+{
+    /**
+     * @return SplFileInfo[]
+     */
+    public function provider(): array
+    {
+        $finder = (new Finder())->name('*.yaml')
+            ->in(__DIR__ . '/../config')
+            ->files();
+
+        return iterator_to_array($finder->getIterator());
+    }
+}
+
+class ServiceConfigurationValidator
+{
+    /**
+     * @param mixed $configuration
+     */
+    public function validate(string $serviceClass, $configuration, SplFileInfo $configFileInfo): void
+    {
+        if (! is_array($configuration)) {
+            return;
+        }
+
+        foreach (array_keys($configuration) as $key) {
+            if (! $this->isArgumentName($key)) {
+                continue;
+            }
+
+            $constructorParameterNames = $this->resolveClassConstructorArgumentNames($serviceClass);
+            if (in_array($key, $constructorParameterNames, true)) {
+                continue;
+            }
+
+            throw new ShouldNotHappenException(sprintf(
+                'Service "%s" has unused argument "%s" in config "%s".%sCorrect it to one of existing arguments "%s".',
+                $serviceClass,
+                $key,
+                $configFileInfo->getRealPath(),
+                PHP_EOL,
+                implode('", "', $constructorParameterNames)
+            ));
+        }
+    }
+
+    /**
+     * @param mixed $key
+     */
+    private function isArgumentName($key): bool
+    {
+        if (! is_string($key)) {
+            return false;
+        }
+
+        return Strings::startsWith($key, '$');
+    }
+
+    /**
+     * @return string[]
+     */
+    private function resolveClassConstructorArgumentNames(string $class): array
+    {
+        $reflectionClass = new ReflectionClass($class);
+        $constructorReflection = $reflectionClass->getConstructor();
+
+        if ($constructorReflection === null) {
+            return [];
+        }
+
+        $constructorParameterNames = [];
+        foreach ($constructorReflection->getParameters() as $parameterReflection) {
+            $constructorParameterNames[] = '$' . $parameterReflection->getName();
+        }
+
+        sort($constructorParameterNames);
+
+        return $constructorParameterNames;
+    }
+}
+
+echo 'All configs have existing services - good job!' . PHP_EOL;

config/set/jms/jms-decouple.yaml

@@ -1,3 +1,4 @@
 services:
     Rector\Rector\Property\InjectAnnotationClassRector:
-        $annotationClass: 'JMS\DiExtraBundle\Annotation\Inject'
+        $annotationClasses:
+            - 'JMS\DiExtraBundle\Annotation\Inject'

config/set/php-di/php-di-decouple.yaml

@@ -1,3 +1,4 @@
 services:
     Rector\Rector\Property\InjectAnnotationClassRector:
-        $annotationClass: 'Inject'
+        $annotationClasses:
+            - 'DI\Annotation\Inject'