Fix function to retrieve dependencies (prevents stackoverflow)

Author: ad-si

lib/dynamic-cache.js

@@ -37,15 +37,31 @@ DynamicCache.prototype.update = function (cb) {
       this._queue = [];
     }
   }.bind(this);
+
   var getDeps = function (filename) {
-    if (this._files[filename]) {
-      return [[filename]].concat(this._files[filename].map(getDeps)).reduce(function (a, b) {
-        return a.concat(b);
-      });
-    } else {
-      return [filename];
+    var dependencies = this._files[filename];
+    var dependenciesSet = {};
+
+    dependenciesSet[filename] = true;
+
+    var getSubDeps = function(deps){
+      deps.forEach(function (dep, index) {
+        if (!dependenciesSet[dep]) {
+          dependenciesSet[dep] = true;
+          var subDeps = this._files[deps[index]];
+          if (subDeps){
+            getSubDeps(subDeps);
+          }
+        }
+      }, this);
+    }.bind(this)
+
+    if (dependencies) {
+      getSubDeps(dependencies);
     }
+    return Object.keys(dependenciesSet);
   }.bind(this);
+
   files.forEach(function (filename) {
     fs.stat(filename, function (err, stats) {
       if (err || stats.mtime.getTime() !== this._time[filename]) {