fixed for alone command description message dispaly on use -h

Author: inhere

src/Base/AbstractCommand.php

@@ -365,6 +365,11 @@ protected function setAnnotationVar(string $name, $value)
      */
     protected function parseAnnotationVars($str)
     {
+        // not use vars
+        if (false === strpos($str, '{')) {
+            return $str;
+        }
+
         static $map;
 
         if ($map === null) {
@@ -374,11 +379,6 @@ protected function parseAnnotationVars($str)
             }
         }
 
-        // not use vars
-        if (false === strpos($str, '{')) {
-            return $str;
-        }
-
         return $map ? strtr($str, $map) : $str;
     }
 
@@ -393,6 +393,7 @@ protected function showHelpByMethodAnnotations($method, $action = null, array $a
     {
         $ref = new \ReflectionClass($this);
         $name = $this->input->getCommand();
+        $isAlone = $ref->isSubclassOf(CommandInterface::class);
 
         if (!$ref->hasMethod($method)) {
             $this->write("The command [<info>$name</info>] don't exist in the group: " . static::getName());
@@ -422,6 +423,12 @@ protected function showHelpByMethodAnnotations($method, $action = null, array $a
 
             $msg = trim($tags[$tag]);
             $tag = ucfirst($tag);
+
+            // for alone command
+            if (!$msg && $tag === 'description' && $isAlone) {
+                $msg = self::getDescription();
+            }
+
             $help[] = "<comment>$tag:</comment>\n $msg\n";
         }