Fix exception on filepaths higher than ignore base

unifiedjs · Mar 30, 2020 · 458be8e · 458be8e
1 parent 876a9c2
commit 458be8e
Showing 1 changed file with 12 additions and 1 deletion.
diff --git a/lib/ignore.js b/lib/ignore.js
@@ -8,6 +8,7 @@ module.exports = Ignore
 
 Ignore.prototype.check = check
 
+var sep = path.sep
 var dirname = path.dirname
 var relative = path.relative
 var resolve = path.resolve
@@ -36,7 +37,17 @@ function check(filePath, callback) {
       callback(error)
     } else if (ignore) {
       normal = relative(ignore.filePath, resolve(self.cwd, filePath))
-      callback(null, normal ? ignore.ignores(normal) : false)
+
+      if (
+        normal === '' ||
+        normal === '..' ||
+        normal.charAt(0) === sep ||
+        normal.slice(0, 3) === '..' + sep
+      ) {
+        callback(null, false)
+      } else {
+        callback(null, ignore.ignores(normal))
+      }
     } else {
       callback(null, false)
     }