Provide error on duplicate YAML keys in strict mode? about ytt HOT 3 OPEN

@GUI Have you considered using a linting tool like yamllint?

I will check if this is something viable to include in lib, and how unmarshalling currently handles duplicate because go yaml lib seems to returns error as per this.

from ytt.

This issue is being marked as stale due to a long period of inactivity and will be closed in 5 days if there is no response.

from ytt.

So i finally got around to check this.
Ytt is removing the duplicate keys and retaining only the last one here.
Plain yaml.v3 unmarshal rejects duplicate keys (https://go.dev/play/p/WEOlmjSJ0UQ)

So I think your suggestion is valid and it seems feasible that we can check in strict mode for unique keys.
I will move the issue to backlog for now.

from ytt.