Add support for validating objects with a to_dict method

[jacobtomlinson]

Thanks for the useful library!

Some other libraries such as kubernetes, kubernetes-asyncio, kr8s and lightkube all have objects that can represent Kubernetes resources, and all of those objects have a to_dict() method. This PR adds support for those objects to be passed directly into kubernetes_validate.validate().

import kubernetes_validate
from kr8s.objects import Pod

pod = Pod({
        "apiVersion": "v1",
        "kind": "Pod",
        "metadata": {
            "name": "my-pod",
        },
        "spec": {
            "containers": [{"name": "pause", "image": "gcr.io/google_containers/pause",}]
        },
    })

kubernetes_validate.validate(pod, "1.28", strict=True)

[willthames]

Hi @jacobtomlinson - I'm definitely happy with the idea of this PR, and once the test suite passes I'll merge it.

I don't know enough mypy to be able to offer suggestions for fixes, unfortunately!

[jacobtomlinson]

Thanks @willthames. I think I've made mypy happy now.

[jacobtomlinson]

Using Any felt like cheating here so on second thoughts I made a protocol instead, I've not done that before so that was a fun learning experience. mypy is happy for me locally so hopefully CI will be happy now.

[willthames]

ok, now the updates are failing flake8 tests, but that should be very simple to fix up.

[jacobtomlinson]

Gah so sorry. Pushed another commit.

[willthames]

Thanks @jacobtomlinson , I'll sort a new 1.28 release shortly

[willthames]

1.28.1 is now released

[jacobtomlinson]

Awesome thanks @willthames!

[jacobtomlinson]

I added an example of using kubernetes-validate to the kr8s documentation too.