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# -*- coding: utf-8 -*-
# Copyright 2010-2012, Google Inc.
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are
# met:
#
#     * Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
#     * Redistributions in binary form must reproduce the above
# copyright notice, this list of conditions and the following disclaimer
# in the documentation and/or other materials provided with the
# distribution.
#     * Neither the name of Google Inc. nor the names of its
# contributors may be used to endorse or promote products derived from
# this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

"""A checker tool to make sure if the binary size is too huge.

Usage:
  % python binary_size_checker.py --target_directory=out_linux/Debug
"""


__author__ = "mukai"


import logging
import optparse
import os
import sys


# The expected maximum size of each package and binary.  Each size is
# in Megabytes.
EXPECTED_MAXIMUM_SIZES = {
    # Distribution package files:
    'GoogleJapaneseInput.dmg': 55,
    'GoogleJapaneseInput32.msi': 55,
    'GoogleJapaneseInput64.msi': 60,
    }


def ScanAndCheckSize(directory):
  """Scan the specified directory and check the binary/package size.

  Args:
    directory: the directory file name to be scanned.
  """
  for filename in os.listdir(directory):
    if filename in EXPECTED_MAXIMUM_SIZES:
      actual_size = os.stat(os.path.join(directory, filename)).st_size
      expected_size = EXPECTED_MAXIMUM_SIZES[filename]
      if actual_size < expected_size * 1024 * 1024:
        print 'Pass: %s (size: %d) is smaller than expected (%d MB)' % (
            filename, actual_size, expected_size)
      else:
        print 'WARNING: %s (size: %d) is larger than expected (%d MB)' % (
            filename, actual_size, expected_size)


def ParseOptions():
  """Parse command line options.

  Returns:
    The options data passed.
  """
  parser = optparse.OptionParser()
  parser.add_option('--target_directory', dest='target_directory',
                    help='The directory which will contain target binaries '
                    'and packages.')
  (options, unused_args) = parser.parse_args()
  return options


def main():
  """The main function."""
  options = ParseOptions()
  if not options.target_directory:
    logging.error('--target_directory is not specified.')
    sys.exit(-1)
  ScanAndCheckSize(options.target_directory)


if __name__ == '__main__':
  main()