Rhai VS mun

The OS would be built in Rust and the module system could be made using ELF executibles (fast, but it could be really hard to implement modules to communicate with the kernel), WASM (can compile from many languages, slower but not too slow, APIs can be simple enough to implement if the correct VM is choses) or even a custom scripting language like rhai (slower, but best way for the implementation [way to connect modules and kernel]).

For sure, that's where something like rhai would shine: https://crates.io/crates/rhai

Oh yeah, for sure. But there are rust based scripting languages that are designed to interop with rust, such as rhai: https://crates.io/crates/rhai

Markdown support Markdown as a templating language is supported, and you can use global and local configs. Also, there are several built-in helpers, and you can make your own, in the language rhai

I came across this library lately which might be close to what you’re looking for: https://github.com/rhaiscript/rhai

Perhaps https://mun-lang.org? Might be a bit raw for your needs tho.

But that’s not all! In total, this release contains 111 pull requests made by 5 of our community contributors and our two Core Team members & Dependabot. Thanks for having our back! For a full list have a look at the changelog, but the main improvements are:

For those of you who haven’t heard of Mun before, Mun is an embeddable programming language empowering creation through iteration. The idea to create Mun originated out of frustration with the Lua dynamic scripting language and a desire to have similar hot reloading functionality available in Rust. As such, it’s not a direct competitor with Rust, but instead is intended to be used with Rust (or C/C++) as a host/embedded language pairing. Actually, Mun is completely written in Rust, building on similar crates as rust-analyzer and rustc. Its key features include:

Whenever I read about Mun, I'm always really, really intrigued… Until I remember that it currently has no string type and support for one is not currently planned. That's a bit of a shame, IMHO, because otherwise, this looks great!

There's mun [1] which is statically typed and AOT compiled.

1: https://github.com/mun-lang/mun

From the reverse-dependencies of the salsa crate, the (archived) Lark compiler used it and the Mun compiler uses it.

I notice that there are projects like mun trying to achieve a similar goal, but I'm kind of curious why they are not getting much attention from the community.

Have you heard of https://mun-lang.org/ ?

It's an embeddable scripting language with the goal of being a Rust-like language that supports hot reloading of functions AND data. To achieve the latter, it uses GC'ed memory such that memory can easily be mapped when the memory's type changes.

It's still in early development but maybe one day will serve your needs :)

In terms of pure Rust engines/frameworks it seems the overall "problem" is lack of scripting, at least from my perspective. Mun seemed extremely interesting, but since even the project itself says "don't use it" I guess it's not a real option, and considering the amount of time we spent on the GDScript/Rust integration I'm a little worried that rolling something more custom would be even less efficient.