nsjail VS extism

So what's the difference between nsjail[1] and bubblewrap[2]?

[1] https://github.com/google/nsjail

I am currently working on a code execution engine (also written in Rust) which uses nsjail for sandboxing and gnu time for measuring time and memory usage under the hood. You can run arbitrary code simply using a rest api and there is also a client library for Rust. It can already run C++, Rust and Python (and a few other languages) while allowing you to specify multiple source files, environment variables, command line arguments, standard input and resource limits (e.g. time, memory, maximum number of processes and whether network access is allowed or not). After running the program, the engine reports exit codes, outputs (stdout and stderr) and the amount of resources the program used.

Extism can be really useful for packaging up and running cross-language libraries!

The most clear information about it is at: https://extism.org, but its a bit focused on the primary use case for Extism, being a universal plugin system.

There is a C PDK (https://github.com/extism/c-pdk) which you'd probably want to use in a new wrapper around your library in C++, and compile it to wasm32 freestanding or WASI, but without emscripten. Extism doesn't currently have an interop layer to emscripten.

It may just be my own unique obsession to peek at the internals of .wasm, but if anyone else is curious:

https://modsurfer.dylibso.com/module?hash=ab6f4b2de9db171347...

u/nbittich - curious if you've tried to use your language as as a scripting language inside other apps? I took a peak at your browser wasm environment, and think we could hook up the `compute` entrypoint you have here[0], but I'm not certain what the `ctx` does without going super deep, and if it could be passed into an Extism function[1] (which is how I'd try to run it from within 16+ other languages).

[0]: https://github.com/nbittich/adana/blob/master/adana-script-w...

[1]: https://github.com/extism/extism

Yep, this is one of the initial motivations for creating Extism: https://github.com/extism/extism -- and it works across 16 host languages & 8 guest languages.

On the devx, there's definitely some rough edges around building and using Wasm. My company has been working on a framework to ease integrating Wasm into existing applications. One area it focuses on is providing easy data passing between the host program and the Wasm and vice versa. https://github.com/extism/extism We do not have WASI preview 2 support yet, but are interested in integrating it.