warn about deprecated type

Author: TomasVotruba

src/Console/Command/ProcessCommand.php

@@ -179,6 +179,7 @@ protected function execute(InputInterface $input, OutputInterface $output): int
 
         $outputFormatter->report($processResult, $configuration);
 
+        // 4. Deprecations reporter
         $this->deprecatedRulesReporter->reportDeprecatedRules();
         $this->deprecatedRulesReporter->reportDeprecatedSkippedRules();
         $this->deprecatedRulesReporter->reportDeprecatedNodeTypes();

src/Reporting/DeprecatedRulesReporter.php

@@ -10,6 +10,8 @@
 use Rector\Contract\PhpParser\Node\StmtsAwareInterface;
 use Rector\Contract\Rector\RectorInterface;
 use Rector\PhpParser\Enum\NodeGroup;
+use Rector\PhpParser\Node\CustomNode\FileWithoutNamespace;
+use Rector\PhpParser\Node\FileNode;
 use Symfony\Component\Console\Style\SymfonyStyle;
 
 final readonly class DeprecatedRulesReporter
@@ -62,6 +64,11 @@ public function reportDeprecatedNodeTypes(): void
         static $reportedClasses = [];
 
         foreach ($this->rectors as $rector) {
+            if (in_array(FileWithoutNamespace::class, $rector->getNodeTypes(), true)) {
+                $this->reportDeprecatedFileWithoutNamespace($rector);
+                continue;
+            }
+
             if (! in_array(StmtsAwareInterface::class, $rector->getNodeTypes())) {
                 continue;
             }
@@ -84,4 +91,16 @@ public function reportDeprecatedNodeTypes(): void
             ));
         }
     }
+
+    private function reportDeprecatedFileWithoutNamespace(RectorInterface $rector): void
+    {
+        $this->symfonyStyle->warning(sprintf(
+            'Node type "%s" is deprecated and will be removed. Use "%s" in the "%s" rule instead instead.%sSee %s for upgrade path',
+            FileWithoutNamespace::class,
+            FileNode::class,
+            $rector::class,
+            PHP_EOL . PHP_EOL,
+            'https://github.com/rectorphp/rector-src/blob/main/UPGRADING.md'
+        ));
+    }
 }