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# Copyright (C) 2015 Lars Wirzenius
#
# 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 re
class PathnameExcluder(object):
'''Decide which pathnames to exclude from a backup. '''
def __init__(self):
self._exclude_patterns = []
self._include_patterns = []
def exclude_regexp(self, regexp):
self._exclude_patterns.append((regexp, re.compile(regexp)))
def allow_regexp(self, regexp):
self._include_patterns.append((regexp, re.compile(regexp)))
def exclude(self, pathname):
included_regexp = self._match(pathname, self._include_patterns)
if included_regexp:
return False, included_regexp
excluded_regexp = self._match(pathname, self._exclude_patterns)
if excluded_regexp:
return True, excluded_regexp
return False, None
def _match(self, pathname, patterns):
for regexp, pattern in patterns:
if pattern.search(pathname):
return regexp
return None
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