1 files changed, 16 insertions, 0 deletions
diff --git a/deps/npm/lib/ls.js b/deps/npm/lib/ls.js
index eee4f2772..05166ee6a 100644
--- a/deps/npm/lib/ls.js
+++ b/deps/npm/lib/ls.js
@@ -40,6 +40,7 @@ function ls (args, silent, cb) {
   var opt = { depth: depth, log: log.warn, dev: true }
   readInstalled(dir, opt, function (er, data) {
     pruneNestedExtraneous(data)
+    filterByEnv(data)
     var bfs = bfsify(data, args)
       , lite = getLite(bfs)
 
@@ -88,6 +89,21 @@ function pruneNestedExtraneous (data, visited) {
   }
 }
 
+function filterByEnv (data) {
+  var dev = npm.config.get("dev")
+  var production = npm.config.get("production")
+  if (dev === production) return
+  var dependencies = {}
+  var devDependencies = data.devDependencies || []
+  Object.keys(data.dependencies).forEach(function (name) {
+    var keys = Object.keys(devDependencies)
+    if (production && keys.indexOf(name) !== -1) return
+    if (dev && keys.indexOf(name) === -1) return
+    dependencies[name] = data.dependencies[name]
+  })
+  data.dependencies = dependencies
+}
+
 function alphasort (a, b) {
   a = a.toLowerCase()
   b = b.toLowerCase()