Better error reporting in generator

Author: arrilot

src/Console/WidgetMakeCommand.php

@@ -2,6 +2,8 @@
 
 namespace Arrilot\Widgets\Console;
 
+use RuntimeException;
+use Illuminate\Support\Str;
 use Illuminate\Console\GeneratorCommand;
 use Symfony\Component\Console\Input\InputOption;
 
@@ -139,7 +141,13 @@ protected function replaceView($stub)
      */
     protected function getDefaultNamespace($rootNamespace)
     {
-        return config('laravel-widgets.default_namespace', $rootNamespace.'\Widgets');
+        $namespace =  config('laravel-widgets.default_namespace', $rootNamespace.'\Widgets');
+
+        if (!Str::startsWith($namespace, $rootNamespace)) {
+            throw new RuntimeException("You can not use the generator if the default namespace ($namespace) does not start with application namespace ($rootNamespace)");
+        }
+
+        return $namespace;
     }
 
     /**