Add support for recursive schemas #182910
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Feature:http
Feature:OAS
Work or issues related to Core-provided mechanisms for generating OAS
Team:Core
Core services & architecture: plugins, logging, config, saved objects, http, ES client, i18n, etc
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jloleysens
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May 23, 2024
## Summary Close #182910 Add the ability to declare recursive schemas. Updates `@kbn/config-schema` to support recursive types. This design follows the underlying pattern provided by Joi: https://joi.dev/api/?v=17.13.0#linkref: ```ts const id = 'recursive'; const recursiveSchema: Type<RecursiveType> = schema.object( { name: schema.string(), self: schema.lazy<RecursiveType>(id), }, { meta: { id } } ); ``` Since using the `.link` API we are also using `.id` which enables us to leverage this mechanism OOTB with `joi-to-json` for OAS generation (thus we could delete a lot of code there). I chose to avoid using `id` originally because I thought it would be simpler if we control more of the conversion in config-schema's case but for recursive schemas and references I think this is a favourable trade off. Open to other ideas! --------- Co-authored-by: kibanamachine <[email protected]>
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