third_party/node/node.py

#!/usr/bin/env python
# Copyright 2017 The Chromium Authors
# 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
import os


def GetBinaryPath():
  if platform.machine() == 'arm64':
    darwin_path = 'mac_arm64'
    darwin_name = 'node-darwin-arm64'
  else:
    darwin_path = 'mac'
    darwin_name = 'node-darwin-x64'
  return os_path.join(os_path.dirname(__file__), *{
    'Darwin': (darwin_path, darwin_name, 'bin', 'node'),
    'Linux': ('linux', 'node-linux-x64', 'bin', 'node'),
    'Windows': ('win', 'node.exe'),
  }[platform.system()])


def RunNodeRaw(cmd_parts, stdout=None):
  cmd = [GetBinaryPath()] + cmd_parts
  process = subprocess.Popen(
      cmd, cwd=os.getcwd(), stdout=subprocess.PIPE, stderr=subprocess.PIPE,
      universal_newlines=True, encoding='utf-8')
  stdout, stderr = process.communicate()
  return process.returncode, stdout, stderr

def RunNode(cmd_parts, stdout=None):
  code, stdout, stderr = RunNodeRaw(cmd_parts, stdout)
  if code != 0:
    errs = []
    if len(stderr) > 0:
      errs.append("stderr:\n" + stderr)
    if len(stdout) > 0:
      # Handle cases where stderr is empty, even though the command failed, for
      # example https://github.com/microsoft/TypeScript/issues/615
      errs.append("stdout:\n" + stdout)
    errs.append("exit=%d" % code)
    cmd = [GetBinaryPath()] + cmd_parts
    raise RuntimeError('Command \'%s\' failed\n%s' % (
        ' '.join(cmd), '\n'.join(errs)))
  return stdout

if __name__ == '__main__':
  RunNode(sys.argv[1:])