Reland of Android: Add APK patch size estimates to resource_sizes.py.

third_party/apk-patch-size-estimator/apk_patch_size_estimator.py

 #!/usr/bin/python
 #
 # Copyright 2016 Google Inc. All Rights Reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
 # You may obtain a copy of the License at
 #
 #      http://www.apache.org/licenses/LICENSE-2.0
 #
@@ skipping 18 matching lines @@
 
 """
 
 import sys
 import argparse
 import locale
 import math
 import os
 import subprocess
 
+_FILEBYFILE_JAR_PATH = os.path.abspath(
+    os.path.join(os.path.dirname(__file__), 'lib', 'file-by-file-tools.jar'))
+
 bsdiff_path = None
 gzip_path = None
 head_path = None
 tail_path = None
 bunzip2_path = None
 java_path = None
 
 
 def find_bins_or_die():
   """Checks that all the binaries needed are available.
@@ skipping 203 matching lines @@
   else:
     filebyfile_patch_path = temp_path + '.filebyfile'
   gzipped_filebyfile_patch_path = filebyfile_patch_path + '.gz'
   if os.path.exists(gzipped_filebyfile_patch_path):
     os.remove(gzipped_filebyfile_patch_path)
 
   # file by file patch
   # We use a jar from https://github.com/andrewhayden/archive-patcher
   if os.path.exists(filebyfile_patch_path): os.remove(filebyfile_patch_path)
   p = subprocess.Popen(
-      [java_path, '-jar', 'lib/file-by-file-tools.jar', '--generate',
-       '--old', old_file, '--new', new_file, '--patch', filebyfile_patch_path],
+      [java_path, '-jar', _FILEBYFILE_JAR_PATH, '--generate', '--old', old_file,
+       '--new', new_file, '--patch', filebyfile_patch_path],
       shell=False)
   ret_code = p.wait()
   if ret_code != 0: raise Exception(
       'Problem creating file by file patch, returned code: %s' % ret_code)
 
   # gzip file by file patch and get its size
   subprocess.check_output([gzip_path, '-9', filebyfile_patch_path])
   gzipped_filebyfile_patch_size = os.stat(gzipped_filebyfile_patch_path).st_size
   # Clean temp files
   if os.path.exists(temp_path): os.remove(temp_path)
@@ skipping 67 matching lines @@
 
   print '\nEstimated download size for updates from the old APK,'
   print ' using File-by-File:'
   print ('   File-by-File patch (gzipped) size: %s bytes [%s]\n'
          % (locale.format('%d', gzipped_filebyfile_patch_size, grouping=True),
             human_file_size(gzipped_filebyfile_patch_size)))
 
 
 if __name__ == '__main__':
   main()