/usr/lib/python3/dist-packages/simplestreams/filters.py is in python3-simplestreams 0.1.0~bzr341-0ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 | # Copyright (C) 2013 Canonical Ltd.
#
# Author: Scott Moser <scott.moser@canonical.com>
#
# Simplestreams is free software: you can redistribute it and/or modify it
# under the terms of the GNU Affero General Public License as published by
# the Free Software Foundation, either version 3 of the License, or (at your
# option) any later version.
#
# Simplestreams 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 Affero General Public
# License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with Simplestreams. If not, see <http://www.gnu.org/licenses/>.
from simplestreams import util
import re
class ItemFilter(object):
def __init__(self, content, noneval=""):
rparsefmt = r"(\w+)[ ]*([!]{0,1}[=~])[ ]*(.*)[ ]*$"
parsed = re.match(rparsefmt, content)
if not parsed:
raise ValueError("Unable to parse expression %s" % content)
(key, op, val) = parsed.groups()
if op in ("!=", "="):
self._matches = val.__eq__
elif op in ("!~", "~"):
self._matches = re.compile(val).search
else:
raise ValueError("Bad parsing of %s" % content)
self.negator = (op[0] != "!")
self.op = op
self.key = key
self.value = val
self.content = content
self.noneval = noneval
def __str__(self):
return "%s %s %s [none=%s]" % (self.key, self.op,
self.value, self.noneval)
def __repr__(self):
return self.__str__()
def matches(self, item):
val = str(item.get(self.key, self.noneval))
return (self.negator == bool(self._matches(val)))
def get_filters(filters, noneval=""):
flist = []
for f in filters:
flist.append(ItemFilter(f, noneval=noneval))
return flist
def filter_item(filters, data, src, pedigree):
data = util.products_exdata(src, pedigree)
for f in filters:
if not f.matches(data):
return False
return True
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