python 3.7 support: Track cpython removal of re._pattern_type
[python-delta-tar] / 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 import sys
28 from datetime import datetime
29 from functools import partial
30
31 from deltatar.deltatar import DeltaTar, NO_MATCH, MATCH, PARENT_MATCH
32 from deltatar.tarfile import TarFile, GNU_FORMAT
33
34 consoleLogger = logging.StreamHandler()
35 consoleLogger.setLevel(logging.DEBUG)
36
37 def check_equal_dirs(path1, path2, deltatar):
38     '''
39     compare the two directories source_dir and target_dir and check
40     # they are the same
41     '''
42     nbars1 = len(path1.split('/'))
43     nbars2 = len(path2.split('/'))
44
45     source_it = deltatar._recursive_walk_dir(path1)
46     source_it = deltatar.jsonize_path_iterator(source_it, strip=nbars1)
47     target_it = deltatar._recursive_walk_dir(path2)
48     target_it = deltatar.jsonize_path_iterator(target_it, strip=nbars2)
49     while True:
50         try:
51             sitem = next(source_it)
52             titem = next(target_it)
53         except StopIteration:
54             try:
55                 titem = next(target_it)
56                 raise Exception("iterators do not stop at the same time")
57             except StopIteration:
58                 break
59         try:
60             assert deltatar._equal_stat_dicts(sitem, titem)
61         except Exception as e:
62             print(sitem)
63             print(titem)
64             print("FAIL")
65             raise
66
67 if __name__ == "__main__":
68     #import tracemalloc
69     #tracemalloc.enable()
70     #top = tracemalloc.DisplayTop(25)
71     #top.show_lineno = True
72     #top.start(20)
73     parser = argparse.ArgumentParser()
74
75     parser.add_argument("-m", "--mode", default='',
76                         help=
77                             """Mode in which to read/write the backup.
78                             Valid modes are:
79                                        ''           open uncompressed;
80                                        'gz'         open with gzip compression;
81                                        'bz2'        open with bzip2 compression;
82                                        '#gz'        encrypted stream of individually
83                                                     compressed tar blocks.
84                             To enable encryption, supply a password.
85                             """)
86     parser.add_argument("-t", "--targetpath", help="Target path directory.")
87     parser.add_argument("-s", "--sourcepath", help="Source path directory.")
88     epw = os.getenv ("PDTCRYPT_PASSWORD")
89     parser.add_argument("-p", "--password",
90                         default=epw.strip () if epw is not None else None,
91                         help="Password for symmetric encryption. "
92                              "The environment variable PDTCRYPT_PASSWORD should "
93                              "be preferred to this. Enables encryption.")
94     parser.add_argument("-v", "--volsize", default=None,
95                         help="Maximum volume size, in megabytes.")
96     parser.add_argument("-r", "--restore", action='store_true',
97                         help="Restore a backup.")
98     parser.add_argument("-R", "--recover", action='store_true',
99                         help="Recover a potentially damaged backup with an index file.")
100     parser.add_argument("-f", "--full", action='store_true',
101                         help="Create a full backup.")
102     parser.add_argument("-d", "--diff", action='store_true',
103                         help="Create a diff backup.")
104     parser.add_argument("-i", "--indexes", nargs='+', help="Indexes paths.")
105     parser.add_argument("-l", "--list-files", action='store_true',
106                         help="List files in a tarball.")
107     parser.add_argument("-x", "--excluded", nargs='+', default=[],
108                         help="Files to exclude from backup.")
109     parser.add_argument("-inc", "--included", nargs='+', default=[],
110                         help="Files to include in the backup.")
111     parser.add_argument("-ip", "--included-path", default=None,
112                         help="Path to a file containing a list of included paths.")
113     parser.add_argument("-xp", "--excluded-path", default=None,
114                         help="Path to a file containing a list of excluded paths.")
115     parser.add_argument("-e", "--equals", action='store_true',
116                         help="Check if two dirs are equal.")
117
118     args = parser.parse_args()
119
120     if args.excluded_path:
121         f = open(args.excluded_path, 'r')
122         excluded_files = f.readlines()
123         f.close()
124     else:
125         excluded_files = args.excluded
126
127     if args.included_path:
128         f = open(args.included_path, 'r')
129         included_files = f.readlines()
130         f.close()
131     else:
132         included_files = args.included
133
134     deltatar = DeltaTar(mode=args.mode, password=args.password,
135         logger=consoleLogger, excluded_files=excluded_files,
136         included_files=included_files)
137
138     if args.full:
139         deltatar.create_full_backup(args.sourcepath, args.targetpath, args.volsize)
140     elif args.diff:
141         deltatar.create_diff_backup(args.sourcepath, args.targetpath, args.indexes[0], args.volsize)
142     elif args.list_files:
143         deltatar.list_backup(args.sourcepath, lambda e: print (e.name))
144     elif args.restore:
145         if args.indexes is not None:
146             deltatar.restore_backup(args.targetpath, backup_indexes_paths=args.indexes)
147         else:
148             deltatar.restore_backup(args.targetpath, backup_tar_path=args.sourcepath)
149     elif args.recover:
150         if args.sourcepath is not None:
151             print("Disaster recovery conflicts with --sourcepath; please supply"
152                   " an\nindex file (--indexes).", file=sys.stderr)
153         failed = deltatar.recover_backup(args.targetpath,
154                                          backup_indexes_paths=args.indexes)
155         if len (failed) > 0:
156             logger = logging.getLogger('deltatar.DeltaTar')
157             print ("%d files could not be restored:" % len (failed))
158             for i, f in enumerate (failed):
159                 print ("   [%d] %s (%s)" % (i, f [0], f [1]))
160
161     elif args.equals:
162         check_equal_dirs(os.path.abspath(args.sourcepath), os.path.abspath(args.targetpath), deltatar)
163     else:
164         print("Nothing to do.\nPlease specify one of --full, --diff, --list-files, "
165               "--restore, --equals.\n", file=sys.stderr)
166         parser.print_help(file=sys.stderr)
167
168