feat: add phpstan

.github/workflows/php.yaml

@@ -25,3 +25,19 @@ jobs:
 
       - name: PHP CS Fixer
         run: vendor/bin/php-cs-fixer fix --dry-run --diff
+  phpstan:
+    runs-on: ubuntu-24.04
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Setup PHP
+        uses: shivammathur/setup-php@v2
+        with:
+          php-version: '8.2'
+
+      - name: Composer install
+        run: composer install
+
+      - name: PHPStan
+        run: vendor/bin/phpstan analyse

phpstan.neon

@@ -0,0 +1,4 @@
+parameters:
+    level: max
+    paths:
+        - src

src/Rule/InternalFunctionCallRule.php

@@ -13,6 +13,11 @@
 use PHPStan\Rules\Rule;
 use Shopware\PhpStan\Helper\NamespaceChecker;
 
+/**
+ * @implements Rule<FuncCall>
+ *
+ * @internal
+ */
 class InternalFunctionCallRule implements Rule
 {
     private ReflectionProvider $reflectionProvider;

src/Rule/InternalMethodCallRule.php

@@ -7,6 +7,7 @@
 namespace Shopware\PhpStan\Rule;
 
 use PhpParser\Node;
+use PhpParser\Node\Expr\FuncCall;
 use PhpParser\Node\Expr\MethodCall;
 use PhpParser\Node\Identifier;
 use PHPStan\Analyser\Scope;
@@ -16,6 +17,11 @@
 use PHPStan\Type\TypeUtils;
 use Shopware\PhpStan\Helper\NamespaceChecker;
 
+/**
+ * @implements Rule<MethodCall>
+ *
+ * @internal
+ */
 class InternalMethodCallRule implements Rule
 {
     public function __construct(private readonly ReflectionProvider $reflectionProvider) {}