1  #! /usr/bin/env python3
       2  #                          __  __            _
       3  #                       ___\ \/ /_ __   __ _| |_
       4  #                      / _ \\  /| '_ \ / _` | __|
       5  #                     |  __//  \| |_) | (_| | |_
       6  #                      \___/_/\_\ .__/ \__,_|\__|
       7  #                               |_| XML parser
       8  #
       9  # Copyright (c) 2017 Rhodri James <rhodri@wildebeest.org.uk>
      10  # Copyright (c) 2017 Sebastian Pipping <sebastian@pipping.org>
      11  # Licensed under the MIT license:
      12  #
      13  # Permission is  hereby granted,  free of charge,  to any  person obtaining
      14  # a  copy  of  this  software   and  associated  documentation  files  (the
      15  # "Software"),  to  deal in  the  Software  without restriction,  including
      16  # without  limitation the  rights  to use,  copy,  modify, merge,  publish,
      17  # distribute, sublicense, and/or sell copies of the Software, and to permit
      18  # persons  to whom  the Software  is  furnished to  do so,  subject to  the
      19  # following conditions:
      20  #
      21  # The above copyright  notice and this permission notice  shall be included
      22  # in all copies or substantial portions of the Software.
      23  #
      24  # THE  SOFTWARE  IS  PROVIDED  "AS  IS",  WITHOUT  WARRANTY  OF  ANY  KIND,
      25  # EXPRESS  OR IMPLIED,  INCLUDING  BUT  NOT LIMITED  TO  THE WARRANTIES  OF
      26  # MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
      27  # NO EVENT SHALL THE AUTHORS OR  COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
      28  # DAMAGES OR  OTHER LIABILITY, WHETHER  IN AN  ACTION OF CONTRACT,  TORT OR
      29  # OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
      30  # USE OR OTHER DEALINGS IN THE SOFTWARE.
      31  
      32  import argparse
      33  import difflib
      34  import sys
      35  
      36  
      37  def _read_lines(filename):
      38      try:
      39          with open(filename) as f:
      40              return f.readlines()
      41      except UnicodeDecodeError:
      42          with open(filename, encoding='utf_16') as f:
      43              return f.readlines()
      44  
      45  
      46  def main():
      47      parser = argparse.ArgumentParser()
      48      parser.add_argument('first', metavar='FILE')
      49      parser.add_argument('second', metavar='FILE')
      50      config = parser.parse_args()
      51  
      52      first = _read_lines(config.first)
      53      second = _read_lines(config.second)
      54  
      55      diffs = list(difflib.unified_diff(first, second, fromfile=config.first,
      56                                        tofile=config.second))
      57      if diffs:
      58          sys.stdout.writelines(diffs)
      59          sys.exit(1)
      60  
      61  
      62  if __name__ == '__main__':
      63      main()