#!/usr/bin/env python
# Copyright 2017 The Chromium Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.

from os import path as os_path
import platform
import subprocess
import sys


def GetBinaryPath():
  return os_path.join(os_path.dirname(__file__), *{
    'Darwin': ('mac', 'node-darwin-x64', 'bin', 'node'),
    '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