Allow Fn::Transform inside a Fn::Sub (#3213)

aws-cloudformation · May 3, 2024 · 21786f7 · 21786f7
1 parent f8b97dc
commit 21786f7
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Showing 2 changed files with 12 additions and 10 deletions.
diff --git a/src/cfnlint/helpers.py b/src/cfnlint/helpers.py
@@ -134,21 +134,22 @@
 FUNCTIONS = frozenset(
     [
         "Fn::Base64",
+        "Fn::Cidr",
+        "Fn::Contains",
+        "Fn::FindInMap",
+        "Fn::ForEach::[a-zA-Z0-9]+",
         "Fn::GetAtt",
         "Fn::GetAZs",
+        "Fn::If",
         "Fn::ImportValue",
         "Fn::Join",
-        "Fn::Split",
-        "Fn::FindInMap",
+        "Fn::Length",
         "Fn::Select",
-        "Ref",
-        "Fn::If",
-        "Fn::Contains",
+        "Fn::Split",
         "Fn::Sub",
-        "Fn::Cidr",
-        "Fn::Length",
         "Fn::ToJsonString",
-        "Fn::ForEach::[a-zA-Z0-9]+",
+        "Fn::Transform",
+        "Ref",
     ]
 )
 

diff --git a/src/cfnlint/rules/functions/Sub.py b/src/cfnlint/rules/functions/Sub.py
@@ -32,15 +32,16 @@ def __init__(self) -> None:
         self._functions = [
             "Fn::Base64",
             "Fn::FindInMap",
-            "Fn::GetAZs",
             "Fn::GetAtt",
+            "Fn::GetAZs",
             "Fn::If",
             "Fn::ImportValue",
             "Fn::Join",
             "Fn::Select",
             "Fn::Sub",
-            "Ref",
             "Fn::ToJsonString",
+            "Fn::Transform",
+            "Ref",
         ]
 
     def schema(self, validator: Validator, instance: Any) -> Dict[str, Any]: