From 45d2429aa5d2ffafacdc5d9d00b7097169592427 Mon Sep 17 00:00:00 2001
From: Daniil Baturin <daniil@baturin.org>
Date: Tue, 7 Dec 2021 19:18:28 +0700
Subject: T3006: add a range validator
---
src/validators/range | 56 ++++++++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 56 insertions(+)
create mode 100755 src/validators/range
(limited to 'src')
diff --git a/src/validators/range b/src/validators/range
new file mode 100755
index 000000000..d4c25f3c4
--- /dev/null
+++ b/src/validators/range
@@ -0,0 +1,56 @@
+#!/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)
--
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