developer.intra2net.com Git - python-delta-tar/blob - backup.py

   1 #!/usr/bin/env python3
   2
   3 # Copyright (C) 2013 Intra2net AG
   4 #
   5 # This program is free software; you can redistribute it and/or modify
   6 # it under the terms of the GNU Lesser General Public License as published
   7 # by the Free Software Foundation; either version 3 of the License, or
   8 # (at your option) any later version.
   9 #
  10 # This program is distributed in the hope that it will be useful,
  11 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 # GNU Lesser General Public License for more details.
  14 #
  15 # You should have received a copy of the GNU General Public License
  16 # along with this program.  If not, see
  17 # <http://www.gnu.org/licenses/lgpl-3.0.html>
  18
  19 import argparse
  20 import binascii
  21 import json
  22 import logging
  23 import os
  24 import re
  25 import random
  26 import shutil
  27 from datetime import datetime
  28 from functools import partial
  29
  30 from deltatar.deltatar import DeltaTar, NO_MATCH, MATCH, PARENT_MATCH
  31 from deltatar.tarfile import TarFile, GNU_FORMAT
  32
  33 consoleLogger = logging.StreamHandler()
  34 consoleLogger.setLevel(logging.DEBUG)
  35
  36 def check_equal_dirs(path1, path2, deltatar):
  37     '''
  38     compare the two directories source_dir and target_dir and check
  39     # they are the same
  40     '''
  41     nbars1 = len(path1.split('/'))
  42     nbars2 = len(path2.split('/'))
  43
  44     source_it = deltatar._recursive_walk_dir(path1)
  45     source_it = deltatar.jsonize_path_iterator(source_it, strip=nbars1)
  46     target_it = deltatar._recursive_walk_dir(path2)
  47     target_it = deltatar.jsonize_path_iterator(target_it, strip=nbars2)
  48     while True:
  49         try:
  50             sitem = next(source_it)
  51             titem = next(target_it)
  52         except StopIteration:
  53             try:
  54                 titem = next(target_it)
  55                 raise Exception("iterators do not stop at the same time")
  56             except StopIteration:
  57                 break
  58         try:
  59             assert deltatar._equal_stat_dicts(sitem, titem)
  60         except Exception as e:
  61             print(sitem)
  62             print(titem)
  63             print("FAIL")
  64             raise
  65
  66 if __name__ == "__main__":
  67     #import tracemalloc
  68     #tracemalloc.enable()
  69     #top = tracemalloc.DisplayTop(25)
  70     #top.show_lineno = True
  71     #top.start(20)
  72     parser = argparse.ArgumentParser()
  73
  74     parser.add_argument("-m", "--mode", default='',
  75                         help=
  76                             """Mode in which to read/write the backup.
  77                             Valid modes are:
  78                                        ''           open uncompressed;
  79                                        'gz'         open with gzip compression;
  80                                        'bz2'        open with bzip2 compression;
  81                                        '#gz.aes128' open an aes128 encrypted stream of gzip
  82                                                     compressed tar blocks;
  83                                        '#aes128'    open an aes128 encrypted stream of tar
  84                                                     blocks.
  85                             """)
  86     parser.add_argument("-t", "--targetpath", help="Target path directory.")
  87     parser.add_argument("-s", "--sourcepath", help="Source path directory.")
  88     parser.add_argument("-p", "--password", default='',
  89                         help="Password for symmetric encryption.")
  90     parser.add_argument("-v", "--volsize", default=None,
  91                         help="Maximum volume size, in megabytes.")
  92     parser.add_argument("-r", "--restore", action='store_true',
  93                         help="Restore a backup.")
  94     parser.add_argument("-f", "--full", action='store_true',
  95                         help="Create a full backup.")
  96     parser.add_argument("-d", "--diff", action='store_true',
  97                         help="Create a diff backup.")
  98     parser.add_argument("-i", "--indexes", nargs='+', help="Indexes paths.")
  99     parser.add_argument("-l", "--list-files", action='store_true',
 100                         help="List files in a tarball.")
 101     parser.add_argument("-x", "--excluded", nargs='+', default=[],
 102                         help="Files to exclude from backup.")
 103     parser.add_argument("-inc", "--included", nargs='+', default=[],
 104                         help="Files to include in the backup.")
 105     parser.add_argument("-ip", "--included-path", default=None,
 106                         help="Path to a file containing a list of included paths.")
 107     parser.add_argument("-xp", "--excluded-path", default=None,
 108                         help="Path to a file containing a list of excluded paths.")
 109     parser.add_argument("-e", "--equals", action='store_true',
 110                         help="Check if two dirs are equal.")
 111
 112     args = parser.parse_args()
 113
 114     if args.excluded_path:
 115         f = open(args.excluded_path, 'r')
 116         excluded_files = f.readlines()
 117         f.close()
 118     else:
 119         excluded_files = args.excluded
 120
 121     if args.included_path:
 122         f = open(args.included_path, 'r')
 123         included_files = f.readlines()
 124         f.close()
 125     else:
 126         included_files = args.included
 127
 128     deltatar = DeltaTar(mode=args.mode, password=args.password,
 129         logger=consoleLogger, excluded_files=excluded_files,
 130         included_files=included_files)
 131
 132     if args.full:
 133         deltatar.create_full_backup(args.sourcepath, args.targetpath, args.volsize)
 134     elif args.diff:
 135         deltatar.create_diff_backup(args.sourcepath, args.targetpath, args.indexes[0], args.volsize)
 136     elif args.list_files:
 137         deltatar.list_backup(args.sourcepath, lambda e: print (e.name))
 138     elif args.restore:
 139         if args.indexes is not None:
 140             deltatar.restore_backup(args.targetpath, backup_indexes_paths=args.indexes)
 141         else:
 142             deltatar.restore_backup(args.targetpath, backup_tar_path=args.sourcepath)
 143     elif args.equals:
 144         check_equal_dirs(os.path.abspath(args.sourcepath), os.path.abspath(args.targetpath), deltatar)
 145     else:
 146         import sys
 147         print("Nothing to do.\nPlease specify one of --full, --diff, --list-files, "
 148               "--restore, --equals.\n", file=sys.stderr)
 149         parser.print_help(file=sys.stderr)
 150