Fixed execution without params

src/Environment.php

@@ -44,6 +44,9 @@ class Environment implements ArrayAccess
      */
     public function readFromFile(string $filepath): static
     {
+        if (empty($filepath)) {
+            return $this;
+        }
         $content = file_get_contents(static::$filepath = $filepath);
         $content = json_decode($content, flags: JSON_THROW_ON_ERROR); //TODO try-catch
         $content || throw new JsonException("not a valid environment: $filepath");

src/Processor.php

@@ -26,7 +26,7 @@ class Processor
     /**
      * Converter version
      */
-    public const VERSION = '1.6.0';
+    public const VERSION = '1.6.1';
 
     /**
      * @var int Initial timestamp
@@ -62,6 +62,8 @@ class Processor
      * Constructor
      *
      * @param array $argv Arguments came from cli
+     * @throws IncorrectSettingsFileException
+     * @throws JsonException
      */
     public function __construct(protected readonly array $argv)
     {
@@ -83,7 +85,9 @@ class Processor
      */
     protected function parseArgs(): void
     {
-        foreach ($this->argv as $idx => $arg) {
+        $arguments = array_slice($this->argv, 1);
+        $needHelp = count($arguments) === 0 && !$this->settings::fileExists();
+        foreach ($arguments as $idx => $arg) {
             switch ($arg) {
                 case '-f':
                 case '--file':
@@ -162,9 +166,13 @@ class Processor
 
                 case '-h':
                 case '--help':
-                    die(implode(EOL, $this->usage()) . EOL);
+                    $needHelp = true;
+                    break;
             }
         }
+        if ($needHelp) {
+            die(implode(EOL, $this->usage()) . EOL);
+        }
         if (empty($this->settings->collectionPaths())) {
             throw new InvalidArgumentException('there are no collections to convert');
         }