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1#!/usr/bin/env python
2# Copyright (c) 2012 The Chromium Authors. All rights reserved.
3# Use of this source code is governed by a BSD-style license that can be
4# found in the LICENSE file.
5
6"""Shim to run nacl toolchain download script only if there is a nacl dir."""
7
8import os
9import shutil
10import sys
11
12
13def Main(args):
14  # Exit early if disable_nacl=1.
15  if 'disable_nacl=1' in os.environ.get('GYP_DEFINES', ''):
16    return 0
17  script_dir = os.path.dirname(os.path.abspath(__file__))
18  src_dir = os.path.dirname(script_dir)
19  nacl_dir = os.path.join(src_dir, 'native_client')
20  nacl_build_dir = os.path.join(nacl_dir, 'build')
21  package_version_dir = os.path.join(nacl_build_dir, 'package_version')
22  package_version = os.path.join(package_version_dir, 'package_version.py')
23  if not os.path.exists(package_version):
24    print "Can't find '%s'" % package_version
25    print 'Presumably you are intentionally building without NativeClient.'
26    print 'Skipping NativeClient toolchain download.'
27    sys.exit(0)
28  sys.path.insert(0, package_version_dir)
29  import package_version
30
31  # BUG:
32  # We remove this --optional-pnacl argument, and instead replace it with
33  # --no-pnacl for most cases.  However, if the bot name is an sdk
34  # bot then we will go ahead and download it.  This prevents increasing the
35  # gclient sync time for developers, or standard Chrome bots.
36  if '--optional-pnacl' in args:
37    args.remove('--optional-pnacl')
38    use_pnacl = False
39    buildbot_name = os.environ.get('BUILDBOT_BUILDERNAME', '')
40    if 'pnacl' in buildbot_name and 'sdk' in buildbot_name:
41      use_pnacl = True
42    if use_pnacl:
43      print '\n*** DOWNLOADING PNACL TOOLCHAIN ***\n'
44    else:
45      args.extend(['--exclude', 'pnacl_newlib'])
46
47  # Only download the ARM gcc toolchain if we are building for ARM
48  # TODO(olonho): we need to invent more reliable way to get build
49  # configuration info, to know if we're building for ARM.
50  if 'target_arch=arm' not in os.environ.get('GYP_DEFINES', ''):
51      args.extend(['--exclude', 'nacl_arm_newlib'])
52
53  args.append('sync')
54  package_version.main(args)
55
56  # Because we are no longer extracting the toolchain, it is best to delete
57  # the old extracted ones so that no stale toolchains are left behind. This
58  # also would catch any stale code that happens to work because it is using
59  # an old extracted toolchain that was left behind.
60  toolchain_dir = os.path.join(nacl_dir, 'toolchain')
61  for toolchain_item in os.listdir(toolchain_dir):
62    toolchain_path = os.path.join(toolchain_dir, toolchain_item)
63    if os.path.isdir(toolchain_path) and not toolchain_item.startswith('.'):
64      shutil.rmtree(toolchain_path)
65
66  return 0
67
68
69if __name__ == '__main__':
70  sys.exit(Main(sys.argv[1:]))
71