Harmonize command formats and ensure autocompletion is same

Author: alamirault

Command/DebugCommand.php

@@ -64,7 +64,7 @@ protected function configure()
                 new InputArgument('class', InputArgument::OPTIONAL, 'The form type class'),
                 new InputArgument('option', InputArgument::OPTIONAL, 'The form type option'),
                 new InputOption('show-deprecated', null, InputOption::VALUE_NONE, 'Display deprecated options in form types'),
-                new InputOption('format', null, InputOption::VALUE_REQUIRED, 'The output format (txt or json)', 'txt'),
+                new InputOption('format', null, InputOption::VALUE_REQUIRED, sprintf('The output format ("%s")', implode('", "', $this->getAvailableFormatOptions())), 'txt'),
             ])
             ->setHelp(<<<'EOF'
 The <info>%command.name%</info> command displays information about form types.
@@ -261,8 +261,7 @@ public function complete(CompletionInput $input, CompletionSuggestions $suggesti
         }
 
         if ($input->mustSuggestOptionValuesFor('format')) {
-            $helper = new DescriptorHelper();
-            $suggestions->suggestValues($helper->getFormats());
+            $suggestions->suggestValues($this->getAvailableFormatOptions());
         }
     }
 
@@ -283,4 +282,9 @@ private function completeOptions(string $class, CompletionSuggestions $suggestio
         $resolvedType = $this->formRegistry->getType($class);
         $suggestions->suggestValues($resolvedType->getOptionsResolver()->getDefinedOptions());
     }
+
+    private function getAvailableFormatOptions(): array
+    {
+        return (new DescriptorHelper())->getFormats();
+    }
 }