fixsvn.py

import datetime
import re
import os

badTimeStamp = datetime.datetime.strptime("2010-03-08 15:02:59 -0500", "%Y-%m-%d %H:%M:%S %z")
desiredTimeStamp = datetime.datetime.strptime("2017-08-28 11:15:59 -0400", "%Y-%m-%d %H:%M:%S %z")
delta = desiredTimeStamp - badTimeStamp

for line in open("../backup.log", "r"):  
    m = re.match("r(\\d+) \\| jeff \\| (.*) \(", line)
    if m:
        rev, ts = m.groups()
        if (int(rev) >= 54):
            badSvnTime = datetime.datetime.strptime(ts, "%Y-%m-%d %H:%M:%S %z")
            fixedSvnTime = (badSvnTime + delta).astimezone(datetime.timezone.utc).strftime("%Y-%m-%dT%H:%M:%S.000000Z")
            os.system('svn propset -r%s --revprop svn:date "%s"' % (rev, fixedSvnTime))