src: fix module search path for preload modules

When the preload module is not a abs/relative path, we should use
the standard search mechanism of looking into the node_modules folders
outwards. The current working directory is deemed to be the 'requiring
module', i.e. parent. The search path starts from cwd outwards.

Fixes: https://github.com/nodejs/io.js/issues/1803
PR-URL: https://github.com/nodejs/io.js/pull/1812
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Jeremiah Senkpiel <fishrock123@rocketmail.com>

1 files changed, 14 insertions, 0 deletions

diff --git a/lib/module.js b/lib/module.js
index 65e44b60b1..844b683940 100644
--- a/lib/module.js
+++ b/lib/module.js
@@ -503,6 +503,20 @@ Module.requireRepl = function() {
   return Module._load('internal/repl', '.');
 };
 
+Module._preloadModules = function(requests) {
+  if (!Array.isArray(requests))
+    return;
+
+  // Preloaded modules have a dummy parent module which is deemed to exist
+  // in the current working directory. This seeds the search path for
+  // preloaded modules.
+  var parent = new Module('internal/preload', null);
+  parent.paths = Module._nodeModulePaths(process.cwd());
+  requests.forEach(function(request) {
+    Module._load(request, parent, false);
+  });
+};
+
 Module._initPaths();
 
 // backwards compatibility