Return error code on failure with occ app:enable/disable

core/command/app/disable.php

@@ -47,9 +47,11 @@ class Disable extends Command {
 				$output->writeln($appId . ' disabled');
 			} catch(\Exception $e) {
 				$output->writeln($e->getMessage());
+				return 2;
 			}
 		} else {
 			$output->writeln('No such app enabled: ' . $appId);
+			return 1;
 		}
 	}
 }

core/command/app/enable.php

@@ -43,8 +43,10 @@ class Enable extends Command {
 		$appId = $input->getArgument('app-id');
 		if (\OC_App::isEnabled($appId)) {
 			$output->writeln($appId . ' is already enabled');
+			return 2;
 		} else if (!\OC_App::getAppPath($appId)) {
 			$output->writeln($appId . ' not found');
+			return 1;
 		} else {
 			\OC_App::enable($appId);
 			$output->writeln($appId . ' enabled');