File size: 2,353 Bytes
b40c49c | 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 72 73 74 75 76 77 | """
Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
SPDX-License-Identifier: MIT-0
"""
from __future__ import annotations
import json
from collections import deque
from typing import Any
import regex as re
from cfnlint.helpers import REGEX_DYN_REF
from cfnlint.jsonschema import ValidationError, ValidationResult, Validator
from cfnlint.rules.functions._BaseFn import BaseFn
class Split(BaseFn):
"""Check if Split values are correct"""
id = "E1018"
shortdesc = "Split validation of parameters"
description = "Making sure the split function is properly configured"
source_url = "https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/intrinsic-function-reference-split.html"
tags = ["functions", "split"]
def __init__(self) -> None:
super().__init__("Fn::Split", ("array",), resolved_rule="W1033")
def schema(self, validator: Validator, instance: Any) -> dict[str, Any]:
return {
"type": "array",
"maxItems": 2,
"minItems": 2,
"fn_items": [
{
"schema": {
"type": ["string"],
}
},
{
"functions": [
"Fn::Base64",
"Fn::FindInMap",
"Fn::GetAtt",
"Fn::GetAZs",
"Fn::If",
"Fn::ImportValue",
"Fn::Join",
"Fn::Select",
"Fn::Sub",
"Ref",
],
"schema": {
"type": ["string"],
},
},
],
}
def fn_split(
self, validator: Validator, s: Any, instance: Any, schema: Any
) -> ValidationResult:
errs = list(super().validate(validator, s, instance, schema))
if errs:
yield from iter(errs)
return
key, value = self.key_value(instance)
if re.fullmatch(REGEX_DYN_REF, json.dumps(value[1])):
yield ValidationError(
f"{key!r} does not support dynamic references",
validator=self.fn.py,
path=deque([key, 1]),
)
|