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# -*- coding: utf-8 -*-
# Copyright 2020 Mike Fährmann
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License version 2 as
# published by the Free Software Foundation.
"""Compare versions of the same file and replace/enumerate them on mismatch"""
from .common import PostProcessor
import os
class ComparePP(PostProcessor):
def __init__(self, pathfmt, options):
PostProcessor.__init__(self)
if options.get("action") == "enumerate":
self.run = self._run_enumerate
if options.get("shallow"):
self.compare = self._compare_size
def run(self, pathfmt):
try:
if self.compare(pathfmt.realpath, pathfmt.temppath):
pathfmt.delete = True
except OSError:
pass
def _run_enumerate(self, pathfmt):
num = 1
try:
while not self.compare(pathfmt.realpath, pathfmt.temppath):
pathfmt.prefix = str(num) + "."
pathfmt.set_extension(pathfmt.extension, False)
num += 1
pathfmt.delete = True
except OSError:
pass
def compare(self, f1, f2):
return self._compare_size(f1, f2) and self._compare_content(f1, f2)
@staticmethod
def _compare_size(f1, f2):
return os.stat(f1).st_size == os.stat(f2).st_size
@staticmethod
def _compare_content(f1, f2):
size = 16384
with open(f1, "rb") as fp1, open(f2, "rb") as fp2:
while True:
buf1 = fp1.read(size)
buf2 = fp2.read(size)
if buf1 != buf2:
return False
if not buf1:
return True
__postprocessor__ = ComparePP
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