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# Copyright 2002 Ben Escoto
#
# This file is part of rdiff-backup.
#
# rdiff-backup 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, Inc., 675 Mass Ave, Cambridge MA
# 02139, USA; either version 2 of the License, or (at your option) any
# later version; incorporated herein by reference.
"""Coordinate corresponding files with different names
For instance, some source filenames may contain characters not allowed
on the mirror end. Also, if a source filename is very long (say 240
characters), the extra characters added to related increments may put
them over the usual 255 character limit.
"""
import re
from log import *
import Globals
max_filename_length = 255
# If true, enable character quoting, and set characters making
# regex-style range.
chars_to_quote = None
# These compiled regular expressions are used in quoting and unquoting
chars_to_quote_regexp = None
unquoting_regexp = None
# Use given char to quote. Default is set in Globals.
quoting_char = None
def set_init_quote_vals():
"""Set quoting value from Globals on all conns"""
for conn in Globals.connections:
conn.FilenameMapping.set_init_quote_vals_local()
def set_init_quote_vals_local():
"""Set value on local connection, initialize regexps"""
global chars_to_quote
chars_to_quote = Globals.chars_to_quote
if len(Globals.quoting_char) != 1:
Log.FatalError("Expected single character for quoting char,"
"got '%s' instead" % (Globals.quoting_char,))
quoting_char = Globals.quoting_char
init_quoting_regexps()
def init_quoting_regexps():
"""Compile quoting regular expressions"""
global chars_to_quote_regexp, unquoting_regexp
try:
chars_to_quote_regexp = \
re.compile("[%s%s]" % (chars_to_quote, quoting_char), re.S)
unquoting_regexp = re.compile("%s[0-9]{3}" % quoting_char, re.S)
except re.error:
Log.FatalError("Error '%s' when processing char quote list %s" %
(re.error, chars_to_quote))
def quote(path):
"""Return quoted version of given path
Any characters quoted will be replaced by the quoting char and
the ascii number of the character. For instance, "10:11:12"
would go to "10;05811;05812" if ":" were quoted and ";" were
the quoting character.
"""
return chars_to_quote_regexp.sub(quote_single, path)
def quote_single(match):
"""Return replacement for a single character"""
return "%s%03d" % (quoting_char, ord(match.group()))
def unquote(path):
"""Return original version of quoted filename"""
return unquoting_regexp.sub(unquote_single, path)
def unquote_single(match):
"""Unquote a single quoted character"""
assert len(match.group()) == 4
return chr(int(match.group()[1:]))
def get_quoted_dir_children(rpath):
"""For rpath directory, return list of quoted children in dir"""
if not rpath.isdir(): return []
dir_pairs = [(unquote(filename), filename)
for filename in Robust.listrp(rpath)]
dir_pairs.sort() # sort by real index, not quoted part
child_list = []
for unquoted, filename in dir_pairs:
childrp = rpath.append(unquoted)
childrp.quote_path()
child_list.append(childrp)
return child_list
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