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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
18def parse_version(version_str):
19  """'10.6' => [10, 6]"""
20  return map(int, re.findall(r'(\d+)', version_str))
21
22def find_sdk_dir():
23  job = subprocess.Popen(['xcode-select', '-print-path'],
24                         stdout=subprocess.PIPE,
25                         stderr=subprocess.STDOUT)
26  out, err = job.communicate()
27  if job.returncode != 0:
28    print >>sys.stderr, out
29    print >>sys.stderr, err
30    raise Exception(('Error %d running xcode-select, you might have to run '
31      '|sudo xcode-select --switch /Applications/Xcode.app/Contents/Developer| '
32      'if you are using Xcode 4.') % job.returncode)
33  # The Developer folder moved in Xcode 4.3.
34  xcode43_sdk_path = os.path.join(
35      out.rstrip(), 'Platforms/MacOSX.platform/Developer/SDKs')
36  if os.path.isdir(xcode43_sdk_path):
37    sdk_dir = xcode43_sdk_path
38  else:
39    sdk_dir = os.path.join(out.rstrip(), 'SDKs')
40
41  return sdk_dir
42
43def main():
44  min_sdk_version = '10.6'
45  if len(sys.argv) > 1:
46    min_sdk_version = sys.argv[1]
47
48  sdk_dir = find_sdk_dir()
49
50  sdks = [re.findall('^MacOSX(10\.\d+)\.sdk$', s) for s in os.listdir(sdk_dir)]
51  sdks = [s[0] for s in sdks if s]  # [['10.5'], ['10.6']] => ['10.5', '10.6']
52  sdks = [s for s in sdks  # ['10.5', '10.6'] => ['10.6']
53          if parse_version(s) >= parse_version(min_sdk_version)]
54  if not sdks:
55    raise Exception('No %s+ SDK found' % min_sdk_version)
56  best_sdk = min(sdks, key=parse_version)
57
58  return best_sdk
59
60if __name__ == '__main__':
61  if sys.platform != 'darwin':
62    raise Exception("This script only runs on Mac")
63  print main()
64