bytecodealliance/wasmtime

implement initial-cwd for wasi:cli/environment

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#9,695 opened on Nov 29, 2024

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 (8 comments) (0 reactions) (0 assignees)Rust (17,002 stars) (1,531 forks)batch import
good first issue

Description

For https://github.com/WebAssembly/wasi-cli/blob/main/wit/environment.wit, the initial-cwd implementation currently just returns None. Adding this issue highlighted by the FIXME:

https://github.com/bytecodealliance/wasmtime/blob/66910067642ce2ddf5509845306508f89a24fc9e/crates/wasi/src/host/env.rs#L14-L17

Contributor guide

Tech stack
rust
Domain
cli
Issue type
feature
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
2
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
1-3 hours
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
active
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
clear
Prerequisites
RustWASI concepts
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
75
Research direction
Examine the file crates/wasi/src/host/env.rs around line 14-17 where the function initial cwd currently returns None. Understand how the working directory is managed in wasmtime's WASI implementation by looking at how other WASI functions (e.g., environment variables) are handled. Implement the function to return a valid current working directory, possibly by storing it in the WASI context or querying the OS. Ensure the returned path conforms to WASI specifications.