add an asset for the Linux Android NDK.

infra/bots/zip_utils.py

 #!/usr/bin/env python
 #
 # Copyright 2016 Google Inc.
 #
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 
 """Utilities for zipping and unzipping files."""
 
 
 import fnmatch
 import os
 import zipfile
 
 
 def filtered(names, blacklist):
   """Filter the list of file or directory names."""
   rv = names[:]
   for pattern in blacklist:
     rv = [n for n in rv if not fnmatch.fnmatch(n, pattern)]
   return rv
 
 
 def zip(target_dir, zip_file, blacklist=None):  # pylint: disable=W0622
   """Zip the given directory, write to the given zip file."""
   if not os.path.isdir(target_dir):
     raise IOError('%s does not exist!' % target_dir)
   blacklist = blacklist or []
-  with zipfile.ZipFile(zip_file, 'w') as z:
+  with zipfile.ZipFile(zip_file, 'w', zipfile.ZIP_DEFLATED, True) as z:
     for r, d, f in os.walk(target_dir, topdown=True):
       d[:] = filtered(d, blacklist)
       for filename in filtered(f, blacklist):
         filepath = os.path.join(r, filename)
         zi = zipfile.ZipInfo(filepath)
         zi.filename = os.path.relpath(filepath, target_dir)
         perms = os.stat(filepath).st_mode
         zi.external_attr = perms << 16L
-        zi.compress_type = zipfile.ZIP_STORED
+        zi.compress_type = zipfile.ZIP_DEFLATED
         with open(filepath, 'rb') as f:
           content = f.read()
         z.writestr(zi, content)
       for dirname in d:
         dirpath = os.path.join(r, dirname)
         z.write(dirpath, os.path.relpath(dirpath, target_dir))
 
 
 def unzip(zip_file, target_dir):
   """Unzip the given zip file into the target dir."""
   if not os.path.isdir(target_dir):
     os.makedirs(target_dir)
-  with zipfile.ZipFile(zip_file, 'r') as z:
+  with zipfile.ZipFile(zip_file, 'r', zipfile.ZIP_DEFLATED, True) as z:
     for zi in z.infolist():
       dst_path = os.path.join(target_dir, zi.filename)
       if zi.filename.endswith('/'):
         os.mkdir(dst_path)
       else:
         with open(dst_path, 'w') as f:
           f.write(z.read(zi))
       perms = zi.external_attr >> 16L
       os.chmod(dst_path, perms)