Remove Composer Lock. Tweak Commands and Tasks instantiation

.gitignore

@@ -1,2 +1,3 @@
 /vendor/
 /build
+composer.lock

src/Mage/MageApplication.php

@@ -21,6 +21,7 @@ use Symfony\Component\Console\Event\ConsoleExceptionEvent;
 use Symfony\Component\Console\ConsoleEvents;
 use Symfony\Component\Console\Application;
 use Symfony\Component\Yaml\Yaml;
+use ReflectionClass;
 use Mage\Runtime\Exception\RuntimeException;
 
 /**
@@ -96,8 +97,9 @@ class MageApplication extends Application
         foreach ($finder as $file) {
             $class = substr('\\Mage\\Command\\BuiltIn\\' . str_replace('/', '\\', $file->getRelativePathname()), 0, -4);
             if (class_exists($class)) {
+                $reflex = new ReflectionClass($class);
+                if ($reflex->isInstantiable()) {
                     $command = new $class();
-
                     if ($command instanceof AbstractCommand) {
                         $command->setRuntime($this->runtime);
                         $this->add($command);
@@ -105,6 +107,7 @@ class MageApplication extends Application
                 }
             }
         }
+    }
 
     /**
      * Gets the Runtime instance to use

src/Mage/Task/TaskFactory.php

@@ -14,6 +14,7 @@ use Mage\Runtime\Runtime;
 use Mage\Runtime\Exception\RuntimeException;
 use Symfony\Component\Finder\Finder;
 use Symfony\Component\Finder\SplFileInfo;
+use ReflectionClass;
 
 /**
  * Task Factory
@@ -78,6 +79,8 @@ class TaskFactory
             $task->setOptions($options);
             return $task;
         } elseif (class_exists($name)) {
+            $reflex = new ReflectionClass($name);
+            if ($reflex->isInstantiable()) {
                 $task = new $name();
                 if ($task instanceof AbstractTask) {
                     $task->setOptions($options);
@@ -85,6 +88,7 @@ class TaskFactory
                     return $task;
                 }
             }
+        }
 
         throw new RuntimeException(sprintf('Invalid task name "%s"', $name));
     }
@@ -101,12 +105,14 @@ class TaskFactory
         foreach ($finder as $file) {
             $class = substr('\\Mage\\Task\\BuiltIn\\' . str_replace('/', '\\', $file->getRelativePathname()), 0, -4);
             if (class_exists($class)) {
+                $reflex = new ReflectionClass($class);
+                if ($reflex->isInstantiable()) {
                     $task = new $class();
-
                     if ($task instanceof AbstractTask) {
                         $this->add($task);
                     }
                 }
             }
         }
+    }
 }