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
|
#!/usr/bin/env python3
#
# Copyright (C) 2021 VyOS maintainers and contributors
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License version 2 or later as
# published by the Free Software Foundation.
#
# 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
import sys
import argparse
class MalformedRange(Exception):
pass
def validate_range(value, min=None, max=None):
try:
lower, upper = re.match(r'^(\d+)-(\d+)$', value).groups()
lower, upper = int(lower), int(upper)
if int(lower) > int(upper):
raise MalformedRange("the lower bound exceeds the upper bound".format(value))
if min is not None:
if lower < min:
raise MalformedRange("the lower bound must not be less than {}".format(min))
if max is not None:
if upper > max:
raise MalformedRange("the upper bound must not be greater than {}".format(max))
except (AttributeError, ValueError):
raise MalformedRange("range syntax error")
parser = argparse.ArgumentParser(description='Range validator.')
parser.add_argument('--min', type=int, action='store')
parser.add_argument('--max', type=int, action='store')
parser.add_argument('value', action='store')
if __name__ == '__main__':
args = parser.parse_args()
try:
validate_range(args.value, min=args.min, max=args.max)
except MalformedRange as e:
print("Incorrect range '{}': {}".format(args.value, e))
sys.exit(1)
|
