Tell `openapi-python-client update` to not change certain folders/packages

[adelevie]

When I run:

openapi-python-client update --path apispec.yaml 

A custom folder, util is deleted.

I'd like to have an option where update will ignore the util folder.

I've considered somehow bundling the util folder outside of the package, but I really want something where it's straightforward to distribute some higher level code built on top of the really nice generated code.

[adelevie]

Looks like this line could be replaced https://github.com/openapi-generators/openapi-python-client/blob/main/openapi_python_client/__init__.py#L130 with something that either:

1. explicitly only deletes known folder names (e.g. only models and only api), OR

2. deletes everything except some allow-listed folder names

[adelevie]

here's a short proof of concept:

#641

[dbanty]

Related to #454 I think

[adelevie]

Absolutely related, thanks for pointing out.

Happy to try and take my proof concept across the finish line, but also not sure what the desired developer experience is.

I do like the "ignore" terminology in #454, for what it's worth.