[Feature Request] JSON Schema output

[jordens]

🚀 Feature Request

Add a JSON Schema backend for serde-generate.

Motivation

JSON Schema as a representation for the schema generated by serde-reflection would be nice.

In a first step I'd try this as a simple backend to serde-generate.

Later one could also consider using JSON Schema for the serde-generate input and replacing the ad-hoc YAML. That would decouple serde-reflection (build schema) from serde-generate (implement schema).

Pitch

I'm happy to spin a PR if this receives support. It would amount to extracting the code we already have and moving it into a new serde-generate backend:

https://github.com/quartiq/miniconf/blob/c741c31b8fcd5e8769861c16081f0d6895e019a2/miniconf/src/json_schema.rs#L58-L188

Additional context

We use this to build JSON schemata for a heterogeneous trees of serde leaves:
https://github.com/quartiq/miniconf/blob/c741c31b8fcd5e8769861c16081f0d6895e019a2/miniconf/examples/trace.rs

The end use case is typically embedded application settings that we modify with JSON over MQTT or JSON over serial/usb.

[Roma4455]

this is a good solution!

[Roma4455]

JSON