Move module script extension check to Helper

Author: Kapil Borle

Engine/Helper.cs

@@ -1775,6 +1775,19 @@ public static bool IsPowerShellVersionSupported(Version version)
             return version >= minSupportedPSVersion;
         }
 
+        /// <summary>
+        /// Determines if analyzing a script module.
+        /// </summary>
+        /// <returns>True is file name ends with ".psm1"</returns>
+        public static bool IsModuleScript(string filepath)
+        {
+            if (filepath == null)
+            {
+                throw new ArgumentNullException("filepath");
+            }
+            return filepath.EndsWith(".psm1");
+        }
+
         /// <summary>
         /// Checks if a given file is a valid PowerShell module manifest
         /// </summary>