docs.rs source code not accessible for `gdnative::api` symbols

[Bromeon]

For symbols inside gdnative::api module, navigating to the source code leads to an error.

In gdnative 0.10.1:
KinematicBody::move_and_slide, then click [source]

This was already present in 0.9.0:
KinematicBody::move_and_slide, then click [src]

Result:

It's likely happening because this file is generated (filename generated.rs) and part of the target folder. It's also not checked into version control. Maybe moving it to a gen/ folder inside src could help.

[chitoyuu]

Question: is the generated source code ever going to be actually useful for end users? I'm aware that some were led to believe that the methods don't exist because they can't follow the source link, but perhaps it's better to approach this from a documentation perspective, than to try and fight with rustdoc and complicate the build process?

We can, for example, emit a short notice like:

Note: Generated source code for API methods might not be availble in rustdoc. This is normal.

... for each of the methods. I recall there being some way to detect whether the program is being compiled for docs.rs, which can optionally be used to reduce clutter when the docs are being built locally.