download_nacl_toolchains.py

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#!/usr/bin/env python

# Copyright (c) 2012 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.

"""Shim to run nacl toolchain download script only if there is a nacl dir."""

from __future__ import print_function

import os

import shutil

import sys

def Main(args):

  script_dir = os.path.dirname(os.path.abspath(__file__))

  src_dir = os.path.dirname(script_dir)

  nacl_dir = os.path.join(src_dir, 'native_client')

  nacl_build_dir = os.path.join(nacl_dir, 'build')

  package_version_dir = os.path.join(nacl_build_dir, 'package_version')

  package_version = os.path.join(package_version_dir, 'package_version.py')

  if not os.path.exists(package_version):

    print("Can't find '%s'" % package_version)

    print('Presumably you are intentionally building without NativeClient.')

    print('Skipping NativeClient toolchain download.')

    sys.exit(0)

  sys.path.insert(0, package_version_dir)

  import package_version

  # BUG:

  # We remove this --optional-pnacl argument, and instead replace it with

  # --no-pnacl for most cases.  However, if the bot name is an sdk

  # bot then we will go ahead and download it.  This prevents increasing the

  # gclient sync time for developers, or standard Chrome bots.

  if '--optional-pnacl' in args:

    args.remove('--optional-pnacl')

    use_pnacl = False

    buildbot_name = os.environ.get('BUILDBOT_BUILDERNAME', '')

    if 'pnacl' in buildbot_name and 'sdk' in buildbot_name:

      use_pnacl = True

    if use_pnacl:

      print('\n*** DOWNLOADING PNACL TOOLCHAIN ***\n')

    else:

      args = ['--exclude', 'pnacl_newlib'] + args

  # Only download the ARM gcc toolchain if we are building for ARM

  # TODO(olonho): we need to invent more reliable way to get build

  # configuration info, to know if we're building for ARM.

  if 'target_arch=arm' not in os.environ.get('GYP_DEFINES', ''):

    args = ['--exclude', 'nacl_arm_newlib'] + args

  return package_version.main(args)

if __name__ == '__main__':

  sys.exit(Main(sys.argv[1:]))