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      1 #!/usr/bin/env python
      2 
      3 # Copyright 2017 Google Inc.
      4 #
      5 # Use of this source code is governed by a BSD-style license that can be
      6 # found in the LICENSE file.
      7 
      8 import hashlib
      9 import os
     10 import shutil
     11 import stat
     12 import sys
     13 import urllib2
     14 
     15 os.chdir(os.path.join(os.path.dirname(__file__), os.pardir))
     16 
     17 def fetch(target):
     18   target_path = 'buildtools/linux64/' + target if 'linux'  in sys.platform else \
     19                 'buildtools/mac/' + target     if 'darwin' in sys.platform else \
     20                 'buildtools/win/'+ target + '.exe'
     21 
     22   sha1 = open(target_path + '.sha1').read().strip()
     23 
     24   def sha1_of_file(path):
     25     h = hashlib.sha1()
     26     if os.path.isfile(path):
     27       with open(path, 'rb') as f:
     28         h.update(f.read())
     29     return h.hexdigest()
     30 
     31   if sha1_of_file(target_path) != sha1:
     32     with open(target_path, 'wb') as f:
     33       url = 'https://chromium-%s.storage-download.googleapis.com/%s' % (target, sha1)
     34       f.write(urllib2.urlopen(url).read())
     35 
     36     os.chmod(target_path, stat.S_IRUSR | stat.S_IWUSR | stat.S_IXUSR |
     37                           stat.S_IRGRP                | stat.S_IXGRP |
     38                           stat.S_IROTH                | stat.S_IXOTH )
     39 
     40   target_copy_path = os.path.join('bin', os.path.basename(target_path))
     41   if sha1_of_file(target_copy_path) != sha1:
     42     shutil.copy(target_path, target_copy_path)
     43 
     44 fetch('clang-format')
     45