[MD WebUI] Polymer-CSS-Build across all bundles.

third_party/node/node.py

Index: third_party/node/node.py
diff --git a/third_party/node/node.py b/third_party/node/node.py
index e2e9a3774ae08c7d47d30fff5d7a18a107b72449..0194f5615501a7755b286b35989132c9f4e4f960 100755
--- a/third_party/node/node.py
+++ b/third_party/node/node.py
@@ -5,6 +5,8 @@
 
 from os import path as os_path
 import platform
+import subprocess
+import sys
 
 
 def GetBinaryPath():
@@ -13,3 +15,16 @@ def GetBinaryPath():
     'Linux': ('linux', 'node-linux-x64', 'bin', 'node'),
     'Windows': ('win', 'node.exe'),
   }[platform.system()])
+
+
+def RunNode(cmd_parts, stdout=None):
+  cmd = " ".join([GetBinaryPath()] + cmd_parts)
+  process = subprocess.Popen(
+      cmd, stdout=subprocess.PIPE, stderr=subprocess.PIPE, shell=True)
+  stdout, stderr = process.communicate()
+
+  if stderr:
+    print >> sys.stderr, '%s failed: %s' % (cmd, stderr)
+    raise
+
+  return stdout