Fix timestamps

fix_timestamp.py

#!/usr/bin/env python

import os.path, time
import argparse
from dateutil import parser

import datetime

argparser = argparse.ArgumentParser(description='fix timestamps for files. oldest timestamp will be set to epoch and other timestamps are calculated based on that')
argparser.add_argument('file', nargs='+', help='list of file to touch')
argparser.add_argument('--epoch', default='2000-01-01', metavar='epoch', help='set custom epoch')
args = argparser.parse_args()

epoch = int(time.mktime(parser.parse(args.epoch).timetuple()))

files = []
for file in args.file:
    files.append((file, os.path.getmtime(file)))

files = sorted(files, key=lambda x: x[1])


for file in files:
    difference = file[1] - files[0][1]
    print(datetime.datetime.fromtimestamp(int(epoch + difference)).strftime('%Y-%m-%d %H:%M:%S') + "\t " + file[0])
    os.utime(file[0], (epoch + difference, epoch + difference))