Add a platform filtering and executable setting abilities to download_from_google_storage.

upload_to_google_storage.py

 #!/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.
 
 """Uploads files to Google Storage content addressed."""
 
 import hashlib
 import optparse
 import os
 import Queue
 import re
+import stat
 import sys
 import threading
 import time
 
 from download_from_google_storage import check_bucket_permissions
 from download_from_google_storage import get_sha1
 from download_from_google_storage import Gsutil
 from download_from_google_storage import printer_worker
 
 GSUTIL_DEFAULT_PATH = os.path.join(
@@ skipping 73 matching lines @@
     stdout_queue.put('%d> Uploading %s...' % (
         thread_num, filename))
     code, _, err = gsutil.check_call('cp', '-q', filename, file_url)
     if code != 0:
       ret_codes.put(
           (code,
            'Encountered error on uploading %s to %s\n%s' %
            (filename, file_url, err)))
       continue
 
+    # Mark executable files with the header "x-goog-meta-executable: 1" which
+    # the download script will check for to preserve the executable bit.
+    if not sys.platform.startswith('win'):
+      if os.stat(filename).st_mode & stat.S_IEXEC:
+        code, _, err = gsutil.check_call('setmeta', '-h',
+                                         'x-goog-meta-executable:1', file_url)
+        if code:
+          ret_codes.put(
+              (code,
+               'Encountered error on setting metadata on %s\n%s' %
+               (file_url, err)))
+
 
 def get_targets(args, parser, use_null_terminator):
   if not args:
     parser.error('Missing target.')
 
   if len(args) == 1 and args[0] == '-':
     # Take stdin as a newline or null seperated list of files.
     if use_null_terminator:
       return sys.stdin.read().split('\0')
     else:
@@ skipping 120 matching lines @@
   if code:
     return code
 
   return upload_to_google_storage(
       input_filenames, base_url, gsutil, options.force, options.use_md5,
       options.num_threads, options.skip_hashing)
 
 
 if __name__ == '__main__':
   sys.exit(main(sys.argv))