Add DiffHelper::getProjectDirectory()

Signed-off-by: Jack Cherng <[email protected]>

Author: jfcherng

src/DiffHelper.php

@@ -16,6 +16,18 @@ private function __construct()
     {
     }
 
+    /**
+     * Get the absolute path of the project root directory.
+     *
+     * @return string
+     */
+    public static function getProjectDirectory(): string
+    {
+        static $path;
+
+        return $path = $path ?? realpath(__DIR__ . '/..');
+    }
+
     /**
      * Get the information about available templates.
      *