| """ |
| Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved. |
| SPDX-License-Identifier: MIT-0 |
| """ |
|
|
| from __future__ import annotations |
|
|
| from typing import Any |
|
|
| from cfnlint.jsonschema import ValidationResult |
| from cfnlint.jsonschema.protocols import Validator |
| from cfnlint.rules.functions._BaseFn import BaseFn |
|
|
|
|
| class Join(BaseFn): |
| """Check if Join values are correct""" |
|
|
| id = "E1022" |
| shortdesc = "Join validation of parameters" |
| description = "Making sure the join function is properly configured" |
| source_url = "https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/intrinsic-function-reference-join.html" |
| tags = ["functions", "join"] |
|
|
| def __init__(self) -> None: |
| super().__init__("Fn::Join", ("string",), resolved_rule="W1032") |
| self.child_rules.update( |
| { |
| "I1022": None, |
| } |
| ) |
|
|
| def schema(self, validator, instance) -> dict[str, Any]: |
| return { |
| "type": "array", |
| "maxItems": 2, |
| "minItems": 2, |
| "fn_items": [ |
| { |
| "schema": { |
| "type": ["string"], |
| }, |
| }, |
| { |
| "functions": [ |
| "Fn::Cidr", |
| "Fn::FindInMap", |
| "Fn::GetAtt", |
| "Fn::If", |
| "Fn::Split", |
| "Ref", |
| ], |
| "schema": { |
| "type": ["array"], |
| "fn_items": { |
| "functions": [ |
| "Fn::Base64", |
| "Fn::FindInMap", |
| "Fn::GetAtt", |
| "Fn::If", |
| "Fn::ImportValue", |
| "Fn::Join", |
| "Fn::Select", |
| "Fn::Sub", |
| "Fn::Transform", |
| "Ref", |
| ], |
| "schema": { |
| "type": ["string"], |
| }, |
| }, |
| }, |
| }, |
| ], |
| } |
|
|
| def fn_join( |
| self, validator: Validator, s: Any, instance: Any, schema: Any |
| ) -> ValidationResult: |
| validator = validator.evolve( |
| context=validator.context.evolve(strict_types=True) |
| ) |
| errs = list(super().validate(validator, s, instance, schema)) |
| if errs: |
| yield from iter(errs) |
|
|
| for rule in self.child_rules.values(): |
| if rule is None or not hasattr(rule, "validate"): |
| continue |
|
|
| yield from rule.validate(validator, s, instance, schema) |
|
|
