this shows a proof of concept for generating Django forms from NixOS modules
note that the form behavior is still rather clumsy and doesn't exactly map to the module semantics:
- since forms can only be sent wholesale, empty form fields will show up as empty strings
and break validation without additional cleanup (not done here)
- it's not possible to faithfully translate `type = submodule { /* ... */}; default = {};`, since the default
is translated to an empty dict `{}`. this is because the JSON schema converter does not preserve type information.
this can be added by making it use `$defs` [1], but that would likely amount to half a rewrite
- there's a glitch in enum default values that needs to be fixed in `datamodel-code-generator` [0]
[0]: dd44480359/src/datamodel_code_generator/parser/base.py (L1015)
[1]: https://json-schema.org/understanding-json-schema/structuring#defs
a generated file will be placed into the source (by the development shell and the package respectively)
that declares Pydantic types from which to render the form. it looks something like this:
```python
from __future__ import annotations
from enum import Enum
from typing import Optional
from pydantic import BaseModel, Extra, Field
from drf_pydantic import BaseModel
class Domain(Enum):
fediversity_net = 'fediversity.net'
# ...
class Model(BaseModel):
class Config:
extra = Extra.forbid
domain: Optional[Domain] = Field(
'fediversity.net',
description='Apex domain under which the services will be deployed.\n',
)
# ...
```
