MAGETWO-33205: Help command in Setup CLI for list of modules

- Added the improved  feature.

Author: Safwan Khan

setup/src/Magento/Setup/Controller/ConsoleController.php

@@ -44,6 +44,12 @@ class ConsoleController extends AbstractActionController
     const CMD_MODULE_DISABLE = 'module-disable';
     /**#@- */
 
+    /**#@+
+     * Help option for retrieving list of modules
+     */
+    const HELP_LIST_OF_MODULES = 'module-list';
+    /**#@- */
+
     /**
      * Map of controller actions exposed in CLI
      *
@@ -84,6 +90,7 @@ class ConsoleController extends AbstractActionController
         UserConfig::KEY_LANGUAGE,
         UserConfig::KEY_CURRENCY,
         UserConfig::KEY_TIMEZONE,
+        self::HELP_LIST_OF_MODULES,
     ];
 
     /**
@@ -543,6 +550,8 @@ public function helpAction()
                 return $this->arrayToString($this->options->getCurrencyList());
             case UserConfig::KEY_TIMEZONE:
                 return $this->arrayToString($this->options->getTimezoneList());
+            case self::HELP_LIST_OF_MODULES:
+                return $this->getModuleList();
             default:
                 if (isset($usages[$type])) {
                     if ($usages[$type]) {
@@ -622,4 +631,34 @@ private function arrayToString($input)
         }
         return $result;
     }
+
+    /**
+     * Get lists of modules - enabled and disabled
+     *
+     * @return string
+     */
+    private function getModuleList()
+    {
+        $moduleList = $this->getObjectManager()->create('Magento\Framework\Module\ModuleList');
+        $result = "\nList of enabled modules:\n";
+        $enabledModuleList = $moduleList->getNames();
+        foreach ($enabledModuleList as $moduleName) {
+            $result .= "$moduleName\n";
+        }
+        if (count($enabledModuleList) === 0) {
+            $result .= "None\n";
+        }
+
+        $fullModuleList = $this->getObjectManager()->create('Magento\Framework\Module\FullModuleList');
+        $result .= "\nList of disabled modules:\n";
+        $disabledModuleList = array_diff($fullModuleList->getNames(), $enabledModuleList);
+        foreach ($disabledModuleList  as $moduleName) {
+            $result .= "$moduleName\n";
+        }
+        if (count($disabledModuleList) === 0) {
+            $result .= "None\n";
+        }
+
+        return $result;
+    }
 }