From e40a55c7f0554dd7db6b17d2d4b19f3d84744371 Mon Sep 17 00:00:00 2001
From: April Arcus <ril@google.com>
Date: Wed, 15 Feb 2023 21:35:55 +0000
Subject: [PATCH] fix parent path traversal

Previously, parentDir behaved as an identity function when its input
ended with a trailing '/', making it impossible to build projects with
imports from parent directories.
---
 es6.js | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/es6.js b/es6.js
index 71e3647..825fe88 100644
--- a/es6.js
+++ b/es6.js
@@ -47,6 +47,9 @@ define([
   // leaving the slash in the result. If there is no slash in the path - the path
   // is just a file name, it will return `undefined`.
   function parentDir (path) {
+    if (path[path.length - 1] === '/') {
+      path = path.substring(0, path.length - 1)
+    }
     var lastSlash = path.lastIndexOf('/');
     return lastSlash > 0 ? path.substring(0, lastSlash + 1) : undefined;
   }