Fix cfnlint 1.3.0 breaking changes

moto/cloudformation/utils.py

@@ -1,4 +1,3 @@
-import os
 import string
 from typing import Any, List
 from urllib.parse import urlparse
@@ -59,24 +58,10 @@ def _f(loader: Any, tag: Any, node: Any) -> Any:
 
 def validate_template_cfn_lint(template: str) -> List[Any]:
     # Importing cfnlint adds a significant overhead, so we keep it local
-    from cfnlint import core, decode
-
-    # Save the template to a temporary file -- cfn-lint requires a file
-    filename = "file.tmp"
-    with open(filename, "w") as file:
-        file.write(template)
-    abs_filename = os.path.abspath(filename)
-
-    # decode handles both yaml and json
-    try:
-        template, matches = decode.decode(abs_filename, False)
-    except TypeError:
-        # As of cfn-lint 0.39.0, the second argument (ignore_bad_template) was dropped
-        # https://github.com/aws-cloudformation/cfn-python-lint/pull/1580
-        template, matches = decode.decode(abs_filename)
+    from cfnlint import api, config, core
 
     # Set cfn-lint to info
-    core.configure_logging(None)
+    config.configure_logging(None, False)
 
     # Initialize the ruleset to be applied (no overrules, no excludes)
     rules = core.get_rules([], [], [])
@@ -85,9 +70,7 @@ def validate_template_cfn_lint(template: str) -> List[Any]:
     regions = ["us-east-1"]
 
     # Process all the rules and gather the errors
-    matches = core.run_checks(abs_filename, template, rules, regions)
-
-    return matches
+    return api.lint(template, rules, regions)
 
 
 def get_stack_from_s3_url(template_url: str, account_id: str, partition: str) -> str:

tests/test_cloudformation/test_validate.py

@@ -69,7 +69,7 @@ def test_boto3_json_invalid_missing_resource():
     err = exc.value.response["Error"]
     assert (
         err["Message"]
-        == "Stack with id Missing top level template section Resources does not exist"
+        == "Stack with id 'Resources' is a required property does not exist"
     )
 
 
@@ -124,5 +124,5 @@ def test_boto3_yaml_invalid_missing_resource():
     err = exc.value.response["Error"]
     assert (
         err["Message"]
-        == "Stack with id Missing top level template section Resources does not exist"
+        == "Stack with id 'Resources' is a required property does not exist"
     )