Comments (3)
Hi @nukemandan.
Thanks for the issue! cargo-component
already supports WASI 0.2.0 (a.k.a. "preview2").
cargo-component
supports it in a few ways:
-
If you use Rust's stdlib, the Rust toolchain will emit a preview1 compatible module;
cargo-component
automatically adapts the preview1 interface into a preview2 interface when creating the component. -
You may use the
wasi
crate to directly interact with WASI preview2; this crate wraps generated bindings, giving a more consistent API. -
You may target the WASI 0.2.0 WIT packages directly from your component and
cargo-component
will generate bindings for you to call WASI imports.
When the Rust toolchain supports WASI 0.2.0, it will simplify the first item above by no longer having to adapt the module from preview1.
from cargo-component.
That PR has merged now, but IIRC it's still mostly just boilerplate, and there's more work before it can be meaningfully used as a way to target WASIp2. E.g. actually creating a Wasm Component from the resulting binary.
from cargo-component.
I see rust-lang/rust#119616 is landing at this moment to have wasm32-wasi-preview2
as a target 😅 - enabling cargo contract to use it in nightly very soon I would think 🤞
from cargo-component.
Related Issues (20)
- `cargo component check --workspace` should not generate bindings for workspace members without `[package.metadata.component]` set HOT 2
- `cargo-component` is not acquring a file lock for componentization
- Document the schema of the cargo-component Cargo.toml configuration HOT 3
- Hello world example fails when project name contains underscore HOT 1
- Add a `cargo component serve` subcommand that uses a default runner of `wasmtime serve`
- wit pubilsh --init fails to register the WIT package to wa.dev, while it successfully create a pacakge on the registry HOT 4
- Build fails with 'failed to create a target world for package ...' HOT 2
- Use something like nightly.link or a non-re-published release to avoid excess notifications
- Build error: `error: string size out of bounds (at offset {offset})` HOT 10
- Additional `import`s in generated component HOT 2
- Resource Static Methods Cause Build Failure When Imported HOT 5
- Wit package name/version validated against registry publishes
- Some wasi imports added per default into wit HOT 2
- cargo install cargo-component error HOT 5
- Compile error when installing cargo component HOT 7
- Minimum Supported Rust Version (MSRV)
- Bindings are sometimes incorrectly generated type + `Borrow` suffix vs `&` type HOT 2
- `cargo component add` not producing runnable/usable binaries
- Cargo Component install give error in RPI 4 (ARM CORTEX-A72) HOT 3
- Update to `-S cli` instead of `-S common` for wasmtime commands
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from cargo-component.