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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
6import os
7import re
8import subprocess
9import sys
10
11"""Prints the lowest locally available SDK version greater than or equal to a
12given minimum sdk version to standard output.
13
14Usage:
15  python find_sdk.py 10.6  # Ignores SDKs < 10.6
16"""
17
18from optparse import OptionParser
19
20
21def parse_version(version_str):
22  """'10.6' => [10, 6]"""
23  return map(int, re.findall(r'(\d+)', version_str))
24
25
26def main():
27  parser = OptionParser()
28  parser.add_option("--verify",
29                    action="store_true", dest="verify", default=False,
30                    help="return the sdk argument and warn if it doesn't exist")
31  parser.add_option("--sdk_path",
32                    action="store", type="string", dest="sdk_path", default="",
33                    help="user-specified SDK path; bypasses verification")
34  (options, args) = parser.parse_args()
35  min_sdk_version = args[0]
36
37  job = subprocess.Popen(['xcode-select', '-print-path'],
38                         stdout=subprocess.PIPE,
39                         stderr=subprocess.STDOUT)
40  out, err = job.communicate()
41  if job.returncode != 0:
42    print >>sys.stderr, out
43    print >>sys.stderr, err
44    raise Exception(('Error %d running xcode-select, you might have to run '
45      '|sudo xcode-select --switch /Applications/Xcode.app/Contents/Developer| '
46      'if you are using Xcode 4.') % job.returncode)
47  # The Developer folder moved in Xcode 4.3.
48  xcode43_sdk_path = os.path.join(
49      out.rstrip(), 'Platforms/MacOSX.platform/Developer/SDKs')
50  if os.path.isdir(xcode43_sdk_path):
51    sdk_dir = xcode43_sdk_path
52  else:
53    sdk_dir = os.path.join(out.rstrip(), 'SDKs')
54  sdks = [re.findall('^MacOSX(10\.\d+)\.sdk$', s) for s in os.listdir(sdk_dir)]
55  sdks = [s[0] for s in sdks if s]  # [['10.5'], ['10.6']] => ['10.5', '10.6']
56  sdks = [s for s in sdks  # ['10.5', '10.6'] => ['10.6']
57          if parse_version(s) >= parse_version(min_sdk_version)]
58  if not sdks:
59    raise Exception('No %s+ SDK found' % min_sdk_version)
60  best_sdk = sorted(sdks, key=parse_version)[0]
61
62  if options.verify and best_sdk != min_sdk_version and not options.sdk_path:
63    print >>sys.stderr, ''
64    print >>sys.stderr, '                                           vvvvvvv'
65    print >>sys.stderr, ''
66    print >>sys.stderr, \
67        'This build requires the %s SDK, but it was not found on your system.' \
68        % min_sdk_version
69    print >>sys.stderr, \
70        'Either install it, or explicitly set mac_sdk in your GYP_DEFINES.'
71    print >>sys.stderr, ''
72    print >>sys.stderr, '                                           ^^^^^^^'
73    print >>sys.stderr, ''
74    return min_sdk_version
75
76  return best_sdk
77
78
79if __name__ == '__main__':
80  if sys.platform != 'darwin':
81    raise Exception("This script only runs on Mac")
82  print main()
83