Using gems with Node WASI

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#604 3 comments 0 reactions 0 assignees View on GitHub

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Assessment

Difficulty
4/5
Estimated time
3-5 days
Newbie friendliness
35/100
Issue type
Feature
Clarity
Mostly clear
Activity status
Stale
Tech stack
node.js, ruby, wasm
Domain
backend

Research direction

Start by reading the DefaultRubyVM usage in the cheatsheet and README, then compare it with the linked wasi.ts wrapper and its handling of preopens. Confirm whether the intended result is a more flexible DefaultRubyVM API or a documented Node WASI example, and validate that gems can be mapped into the WASI virtual filesystem.

Written by the indexing model from the issue text.

Description

Hey, since I needed it myself, and based on https://gist.github.com/kateinoigakukun/5caf3b83b2732b1653e91b0e75ce3390, I wrote JS code that allows you to use gems with Node WASI.

Unfortunately, as you need preopens for that (to map the gems into the WASI vfs), it's currently not possible to use DefaultRubyVM for that, as its options are limited to env.

I wrote my own small wrapper to allow me access to the full breadth of WASI options: https://github.com/primate-run/primate/blob/master/packages/ruby/src/private/wasi.ts, but it took me a bit to understand how to get the RubyVM from the package to mimic the behaviour of DefaultRubyVM. The examples in the cheatsheet are all using DefaultRubyVM.

It is possible to perhaps make DefaultRubyVM a bit more flexible, so that it's possible to use preopens with it?

Alternatively, if you want to keep the defaults simple, perhaps add this example to the readme or cheatsheet? I don't mind sending a PR.

Dominant language
Ruby
Stars
875
Forks
68
Avg merge
9d 5h
Merged PRs (30d)
1

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