Fix E3009 false positive for Fn::Transform in additional properties#4368
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kddejong merged 1 commit intoaws-cloudformation:mainfrom Feb 23, 2026
Merged
Fix E3009 false positive for Fn::Transform in additional properties#4368kddejong merged 1 commit intoaws-cloudformation:mainfrom
kddejong merged 1 commit intoaws-cloudformation:mainfrom
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Exclude Fn::Transform from additional properties validation when it's in the validator's context functions list. This allows Fn::Transform to be used in CloudFormation Init metadata and other contexts where CloudFormation supports it. Fixes aws-cloudformation#4363
Codecov Report✅ All modified and coverable lines are covered by tests. Additional details and impacted files@@ Coverage Diff @@
## main #4368 +/- ##
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- Coverage 93.54% 93.52% -0.02%
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Files 418 418
Lines 14145 14148 +3
Branches 2817 2818 +1
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Hits 13232 13232
- Misses 567 568 +1
- Partials 346 348 +2
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Exclude Fn::Transform from additional properties validation when it's in the validator's context functions list. This allows Fn::Transform to be used in CloudFormation Init metadata and other contexts where CloudFormation supports it.
Fixes #4363
Issue #, if available:
Description of changes:
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