reactor(cust_raw): Generate bindings for cuda types and restructure cust_raw's crates

[jorge-ortega]

• Allow list files instead of types/var/functions.
• Split out type headers from runtime/cublas to their own crate.
• Drop sys prefix from internal crates. (Hopefully we can still get ownership of cuda-sys, which would make the internal sys suffix redundant).

This restructures cust_raw to the following:

src/
├── cublas/        # Cublas and its extensions
│   ├── core.rs
│   ├── lt.rs
│   ├── mod.rs
│   └── xt.rs
├── types/         # Common CUDA Runtime types
│   ├── driver.rs
│   ├── library.rs
│   ├── mod.rs
│   ├── surface.rs
│   └── texture.rs
├── driver.rs
├── lib.rs
├── nvptx.rs
├── nvvm.rs
├── runtime.rs

This is a precursor to adding other CUDA library bindings, like nvJPEG and cudaFFT.

[adamcavendish]

The _sys suffix was originally used because it was a bindgen generated system bindings. I propose that we should align with the community and call them -sys packages.

[jorge-ortega]

The convention tends to only apply to the top-level crate name, not the crates inside of it. The raw in cust_raw kinda conveys what sys is supposed to (there be bindings in here), so if you consider that it comes off a bit redundant:

import cust_raw::driver_sys
            ^           ^_bindings, dammit!
            |_bindings

The important thing is users understand that the crate as a whole only contains bindings before they even add it as a dependency, which should make them gravitate to the higher-level crates.

Still hoping on hearing back from the owner of cuda-sys in #182.

[adamcavendish]

The convention tends to only apply to the top-level crate name, not the crates inside of it. The raw in cust_raw kinda conveys what sys is supposed to (there be bindings in here), so if you consider that it comes off a bit redundant:

import cust_raw::driver_sys
            ^           ^_bindings, dammit!
            |_bindings

The important thing is users understand that the crate as a whole only contains bindings before they even add it as a dependency, which should make them gravitate to the higher-level crates.

Still hoping on hearing back from the owner of cuda-sys in #182.

Yeah, if we do can get the cuda-sys crate, I agree that we can drop the "-sys" suffix.

[LegNeato]

I reached out to them over email.