Remember the library resolution of packages used by the plugin program itself.

tools/bundler.js

@@ -404,6 +404,9 @@ var Target = function (options) {
   // On-disk dependencies of this target.
   self.watchSet = new watch.WatchSet();
 
+  // Map from package name to package directory of all packages used.
+  self.pluginProviderPackageDirs = {};
+
   // node_modules directories that we need to copy into the target (or
   // otherwise make available at runtime.) A map from an absolute path
   // on disk (NodeModulesDirectory.sourcePath) to a
@@ -671,6 +674,11 @@ _.extend(Target.prototype, {
 
       // Depend on the source files that produced these resources.
       self.watchSet.merge(slice.watchSet);
+      // Remember the library resolution of all packages used in these
+      // resources.
+      // XXX assumes that this merges cleanly
+      _.extend(self.pluginProviderPackageDirs,
+               slice.pkg.pluginProviderPackageDirs)
     });
   },
 
@@ -706,6 +714,11 @@ _.extend(Target.prototype, {
     return self.watchSet;
   },
 
+  getPluginProviderPackageDirs: function () {
+    var self = this;
+    return self.pluginProviderPackageDirs;
+  },
+
   // Return the most inclusive architecture with which this target is
   // compatible. For example, if we set out to build a
   // 'os.linux.x86_64' version of this target (by passing that as
@@ -1830,7 +1843,8 @@ exports.buildJsImage = function (options) {
 
   return {
     image: target.toJsImage(),
-    watchSet: target.getWatchSet()
+    watchSet: target.getWatchSet(),
+    pluginProviderPackageDirs: target.getPluginProviderPackageDirs()
   };
 };
 

tools/packages.js

@@ -1006,6 +1006,11 @@ _.extend(Package.prototype, {
         // Add this plugin's dependencies to our "plugin dependency" WatchSet.
         self.pluginWatchSet.merge(buildResult.watchSet);
 
+        // Remember the library resolution of all packages used by the plugin.
+        // XXX assumes that this merges cleanly
+        _.extend(self.pluginProviderPackageDirs,
+                 buildResult.pluginProviderPackageDirs);
+
         // Register the built plugin's code.
         self.plugins[info.name] = buildResult.image;
       });