Filter out all of the modules not currently in play with global operations

This is safe to do globally as deps of globals are NEVER hoisted out of
the global. Each global is self contained.

1 files changed, 13 insertions, 0 deletions

diff --git a/lib/dedupe.js b/lib/dedupe.js
index fc97ebf36..36cc63cb0 100644
--- a/lib/dedupe.js
+++ b/lib/dedupe.js
@@ -35,6 +35,19 @@ function Deduper (where, dryrun) {
   this.noPackageJsonOk = true
 }
 util.inherits(Deduper, Installer)
+
+Deduper.prototype.normalizeTree = function (log, cb) {
+  validate('OF', arguments)
+  // If we're looking globally only look at the one package we're operating on
+  if (npm.config.get('global')) {
+    var args = this.args
+    this.currentTree.children = this.currentTree.children.filter(function (child) {
+      return args.filter(function (arg) { return arg === child.package.name }).length
+    })
+  }
+  Installer.prototype.normalizeTree.call(this, log, cb)
+}
+
 Deduper.prototype.loadAllDepsIntoIdealTree = function (cb) {
   validate('F', arguments)
   var idealTree = this.idealTree