Support for remote $refs

[ioggstream]

Is your feature request related to a problem? Please describe.

Remote $ref are not resolved

Describe the solution you'd like

Remote $ref to be resolved

Describe alternatives you've considered

Remote $refs are downloaded and converted to local refs by an external component

Additional context

components:
  schemas:
    Problem:
      $ref: "https://opensource.zalando.com/problem/schema.yaml#/Problem"

[koxudaxi]

@ioggstream
OK, I try to implement it 🤓

[ioggstream]

@koxudaxi Great! I stubbed an openapi-resolver here https://github.com/ioggstream/openapi-resolver which cover some use cases but has a non-trivial bug with multi-level $refs ioggstream/openapi-resolver#26

The resolver can recursively download $refs and generate a single, bundled, OAS spec trying to preserve relationship between classes and can be an initial building block for fixing the issue.

[koxudaxi]

@ioggstream
I published the feature as 0.5.19.

[koxudaxi]

@ioggstream
I don't use your library because of cutting dependency.
Also, I decide I don't need it this phase.

[ioggstream]

Thank you very much :) These days I was attending EuroPython online edition and I shared your work with the community. Next week I'll push some more tests. Thanks for your great work!

[koxudaxi]

@ioggstream
Thank you for sharing my work 😄

Next week I'll push some more tests.

Great!! I will review it 👍

Also, I'll update fastapi-code-generator for remote files and documents 😉