Disable background workers if they are not supported (see #6995)

Description
-----------

Fixes #6907.

Ready for review but needs an update of the `composer.json` entries before merging. Requires Toflar/cronjob-supervisor#2 to be released as 2.0.0 which I'll only do once this PR is approved concept-wise.

Commits
-------

b63f645 Update to toflar/cronjob-supervisor v2 and disable workers if not sup…
7b81d99 Use static helpers
c1e55c0 Update to stable release

composer.json

@@ -162,7 +162,7 @@
         "terminal42/escargot": "^1.6",
         "terminal42/service-annotation-bundle": "^1.1",
         "tijsverkoyen/css-to-inline-styles": "^2.0",
-        "toflar/cronjob-supervisor": "^1.0",
+        "toflar/cronjob-supervisor": "^2.0",
         "toflar/psr6-symfony-http-cache-store": "^4.0",
         "twig/extra-bundle": "^3.0",
         "twig/string-extra": "^3.0",

core-bundle/composer.json

@@ -151,7 +151,7 @@
         "symfony/yaml": "^6.4",
         "terminal42/escargot": "^1.6",
         "terminal42/service-annotation-bundle": "^1.1",
-        "toflar/cronjob-supervisor": "^1.0",
+        "toflar/cronjob-supervisor": "^2.0",
         "twig/string-extra": "^3.0",
         "twig/twig": "^3.8",
         "ua-parser/uap-php": "^3.9",

core-bundle/config/commands.yaml

@@ -104,11 +104,10 @@ services:
 
     contao.command.supervise_workers:
         class: Contao\CoreBundle\Command\SuperviseWorkersCommand
-        factory: [null, create]
         arguments:
             - '@messenger.receiver_locator'
             - '@contao.process_util'
-            - '%kernel.cache_dir%/worker-supervisor'
+            - ~
             - ~
 
     contao.command.symlinks:

core-bundle/src/Command/SuperviseWorkersCommand.php

@@ -42,11 +42,6 @@ public function __construct(
         parent::__construct();
     }
 
-    public static function create(ContainerInterface $messengerTransportLocator, ProcessUtil $processUtil, string $storageDirectory, array $workers): self
-    {
-        return new self($messengerTransportLocator, $processUtil, new Supervisor($storageDirectory), $workers);
-    }
-
     protected function execute(InputInterface $input, OutputInterface $output): int
     {
         $io = new SymfonyStyle($input, $output);

core-bundle/src/DependencyInjection/ContaoCoreExtension.php

@@ -48,6 +48,7 @@
 use Symfony\Component\Filesystem\Filesystem;
 use Symfony\Component\Filesystem\Path;
 use Symfony\Component\HttpKernel\DependencyInjection\Extension;
+use Toflar\CronjobSupervisor\Supervisor;
 
 class ContaoCoreExtension extends Extension implements PrependExtensionInterface, ConfigureFilesystemInterface
 {
@@ -253,16 +254,24 @@ private function handleMessengerConfig(array $config, ContainerBuilder $containe
             return;
         }
 
+        // Disable workers completely if supervision is not supported
+        if (!Supervisor::canSuperviseWithProviders(Supervisor::getDefaultProviders())) {
+            $config['messenger']['workers'] = [];
+        } else {
+            $supervisor = new Definition(Supervisor::class);
+            $supervisor->setFactory([Supervisor::class, 'withDefaultProviders']);
+            $supervisor->addArgument('%kernel.cache_dir%/worker-supervisor');
+
+            $command = $container->getDefinition('contao.command.supervise_workers');
+            $command->setArgument(2, $supervisor);
+            $command->setArgument(3, $config['messenger']['workers']);
+        }
+
         // No workers defined -> remove our cron job and the command
         if (0 === \count($config['messenger']['workers'])) {
             $container->removeDefinition('contao.cron.supervise_workers');
             $container->removeDefinition('contao.command.supervise_workers');
-
-            return;
         }
-
-        $command = $container->getDefinition('contao.command.supervise_workers');
-        $command->setArgument(3, $config['messenger']['workers']);
     }
 
     private function handleSearchConfig(array $config, ContainerBuilder $container): void