1 files changed, 16 insertions, 0 deletions
diff --git a/deps/npm/lib/utils/spawn.js b/deps/npm/lib/utils/spawn.js
index e389d83e02..b164a6acba 100644
--- a/deps/npm/lib/utils/spawn.js
+++ b/deps/npm/lib/utils/spawn.js
@@ -2,15 +2,31 @@ module.exports = spawn
 
 var _spawn = require('child_process').spawn
 var EventEmitter = require('events').EventEmitter
+var npwr = require('./no-progress-while-running.js')
+
+function willCmdOutput (stdio) {
+  if (stdio === 'inherit') return true
+  if (!Array.isArray(stdio)) return false
+  for (var fh = 1; fh <= 2; ++fh) {
+    if (stdio[fh] === 'inherit') return true
+    if (stdio[fh] === 1 || stdio[fh] === 2) return true
+  }
+  return false
+}
 
 function spawn (cmd, args, options) {
+  var cmdWillOutput = willCmdOutput(options && options.stdio)
+
+  if (cmdWillOutput) npwr.startRunning()
   var raw = _spawn(cmd, args, options)
   var cooked = new EventEmitter()
 
   raw.on('error', function (er) {
+    if (cmdWillOutput) npwr.stopRunning()
     er.file = cmd
     cooked.emit('error', er)
   }).on('close', function (code, signal) {
+    if (cmdWillOutput) npwr.stopRunning()
     // Create ENOENT error because Node.js v0.8 will not emit
     // an `error` event if the command could not be found.
     if (code === 127) {