1 files changed, 11 insertions, 4 deletions
diff --git a/node_modules/lru-cache/lib/lru-cache.js b/node_modules/lru-cache/lib/lru-cache.js
index 1bd4e5864..407ee6857 100644
--- a/node_modules/lru-cache/lib/lru-cache.js
+++ b/node_modules/lru-cache/lib/lru-cache.js
@@ -4,7 +4,7 @@ if (module) {
   module.exports = LRUCache
 } else {
   // just set the global for non-node platforms.
-  ;(function () { return this })().LRUCache = LRUCache
+  this.LRUCache = LRUCache
 }
 
 function hOP (obj, key) {
@@ -13,7 +13,7 @@ function hOP (obj, key) {
 
 function naiveLength () { return 1 }
 
-function LRUCache (maxLength, lengthCalculator) {
+function LRUCache (maxLength, lengthCalculator, maxAge) {
   if (!(this instanceof LRUCache)) {
     return new LRUCache(maxLength, lengthCalculator)
   }
@@ -101,24 +101,30 @@ function LRUCache (maxLength, lengthCalculator) {
     if (hOP(cache, key)) {
       this.get(key)
       cache[key].value = value
-      return
+      return true
     }
 
     var hit = {key:key, value:value, lu:mru++, length:lengthCalculator(value)}
+    if (maxAge) hit.now = Date.now()
 
     // oversized objects fall out of cache automatically.
-    if (hit.length > maxLength) return
+    if (hit.length > maxLength) return false
 
     length += hit.length
     lruList[hit.lu] = cache[key] = hit
     itemCount ++
 
     if (length > maxLength) trim()
+    return true
   }
 
   this.get = function (key) {
     if (!hOP(cache, key)) return
     var hit = cache[key]
+    if (maxAge && Date.now() - hit.now > maxAge) {
+      this.del(key)
+      return
+    }
     delete lruList[hit.lu]
     if (hit.lu === lru) lruWalk()
     hit.lu = mru ++
@@ -149,6 +155,7 @@ function LRUCache (maxLength, lengthCalculator) {
       delete cache[ lruList[prune[i]].key ]
       delete lruList[prune[i]]
     }
+
     lruWalk()
   }
 }