Check if there are missing files in your backup (based on filenames)

did-i-forget-to-backup-something.py

#!/usr/bin/python
# -*- coding: utf-8 -*-
#
# Copyright 2014 Francesco Frassinelli
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.

import collections
import os
import sys
import time

if len(sys.argv) < 3:
    print("Usage: %s target dest" % sys.argv[0])
    exit(1)

def getfiles(rootdir):
    res = collections.defaultdict(list)
    for root, subdirs, files in os.walk(rootdir):
        for f in files:
            res[f].append(os.path.join(root, f))
    return res

target = getfiles(sys.argv[1])
dest = getfiles(sys.argv[2])

for f in set(target.keys())-set(dest.keys()):
    print("%s: %s" % (f, ", ".join(target[f])))
    if len(target[f]) > 1:
        for path in target[f]:
            print("-"*(len(f)+1)+" %s (%s B)" % (
                time.ctime(os.path.getmtime(path)),
                os.path.getsize(path)))