Re: [PATCH v2] docs: Integrate rustdoc into Rust documentation

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On Mon, Dec 5, 2022 at 2:06 AM Akira Yokosawa <akiyks@xxxxxxxxx> wrote:
>
> So, this means "make htmldocs" will require kernel .config if CONFIG_RUST=y.
> I'm not sure this new requirement is acceptable for kernel documentation
> testers who just want to build kernel documentation.

If the worry is that "full tree testers" (or CIs in general) cannot
fully test the docs anymore without a config, that is definitely a
change, and one of the reasons why I initially didn't add it to
`htmldocs`.

However, full tree testers will need other changes anyway (at least
installing the Rust toolchain), even if there was no need for a
config. So it may be not too bad, and putting it in `htmldocs` means
not having to call another target in the CIs; and for humans, less
chance of forgetting etc.

(It is also why I wondered above about
`CONFIG_WARN_MISSING_DOCUMENTS`: if `Documentation/` intended to
require a config as a whole, then it would be fine. I assume that is
not the case, though, but not doing the sync is nevertheless a bit
confusing)

> By the way, is rustdoc's requirement of .config only for CONFIG_RUST?
> In other words, are contents of rustdoc affected by other config settings?
>
> If not, I think rustdoc can be generated regardless of config settings as
> far as necessary tools (rustc, bindgen, etc.) are available.

Yeah, at the moment the config affects what gets generated. However,
that may change in the future: there has been some movement around the
Rust features needed for this recently, so I want to try that approach
again (it would require some other changes, though).

Cheers,
Miguel



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