update export package menu

Scripts/Editor/VRMExportUnityPackage.cs

@@ -1,4 +1,6 @@
 using System;
+using System.Linq;
+using System.Collections.Generic;
 using System.IO;
 using UnityEditor;
 using UnityEngine;
@@ -35,6 +37,32 @@ namespace VRM
             return path;
         }
 
+        static IEnumerable<string> EnumerateFiles(string path)
+        {
+            if (Path.GetFileName(path).StartsWith(".git"))
+            {
+                yield break;
+            }
+
+            if (Directory.Exists(path))
+            {
+                foreach(var child in Directory.GetFileSystemEntries(path))
+                {
+                    foreach(var x in EnumerateFiles(child))
+                    {
+                        yield return x;
+                    }
+                }
+            }
+            else
+            {
+                if (Path.GetExtension(path).ToLower() != ".meta")
+                {
+                    yield return path.Replace("\\", "/");
+                }
+            }
+        }
+
 #if VRM_DEVELOP
         [MenuItem("VRM/Export unitypackage")]
 #endif
@@ -48,7 +76,10 @@ namespace VRM
                 return;
             }
 
-            AssetDatabase.ExportPackage("Assets/VRM", path, ExportPackageOptions.Recurse);
+            var files = EnumerateFiles("Assets/VRM")
+                .ToArray();
+
+            AssetDatabase.ExportPackage(files, path, ExportPackageOptions.Interactive);
             Debug.LogFormat("exported: {0}", path);
         }
     }