feat: add connectivityChecker option

Author: Rubc

src/Adapter/Builder/SftpAdapterDefinitionBuilder.php

@@ -85,6 +85,9 @@ protected function configureOptions(OptionsResolver $resolver)
 
         $resolver->setDefault('permPublic', 0744);
         $resolver->setAllowedTypes('permPublic', 'scalar');
+
+        $resolver->setDefault('connectivityChecker', null);
+        $resolver->setAllowedTypes('connectivityChecker', ['string', 'null']);
     }
 
     protected function configureDefinition(Definition $definition, array $options)
@@ -97,6 +100,10 @@ protected function configureDefinition(Definition $definition, array $options)
             $connectionFqcn = SftpConnectionProviderLegacy::class;
         }
 
+        if (null !== $options['connectivityChecker']) {
+            $options['connectivityChecker'] = new Definition($options['connectivityChecker']);
+        }
+
         $definition->setClass($adapterFqcn);
         $definition->setArgument(0,
             (new Definition($connectionFqcn))

tests/Adapter/Builder/SftpAdapterDefinitionBuilderTest.php

@@ -78,6 +78,7 @@ public function testOptionsBehavior()
             'directoryPerm' => 0755,
             'permPrivate' => 0700,
             'permPublic' => 0744,
+            'connectivityChecker' => null,
             'host' => 'ftp.example.com',
             'username' => 'username',
         ];