Files
wasmtime/crates/wiggle
katelyn martin ab536126dd update WASI submodule (#3025)
* wasi-common: update wasi submodule

This updates the WASI submodule, pulling in changes to the witx crate,
now that there is a 0.9.1 version including some bug fixes. See
WebAssembly/WASI#434 for more information.

* wiggle: update witx dependencies

* publish: verify and vendor witx-cli

* adjust root workspace members

This commit removes some items from the root manifest's workspace
members array, and adds `witx-cli` to the root `workspace.exclude`
array.

The motivation for this stems from a cargo bug described in
rust-lang/cargo#6745: `workspace.exclude` does not work if it is nested
under a `workspace.members` path.

See WebAssembly/WASI#438 for the underlying change to the WASI submodule
which reorganized the `witx-cli` crate, and WebAssembly/WASI#398 for the
original PR introducing `witx-cli`.

See [this
comment](https://github.com/bytecodealliance/wasmtime/pull/3025#issuecomment-867741175)
for more details about the compilation errors, and failed alternative
approaches that necessitated this change.

N.B. This is not a functional change, these crates are still implicitly
workspace members as transitive dependencies, but this will allow us to
side-step the aforementioned cargo bug.

Co-Authored-By: Alex Crichton <alex@alexcrichton.com>

Co-authored-by: Alex Crichton <alex@alexcrichton.com>
2021-06-24 14:21:48 -05:00
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wiggle

Wiggle is a code generator for the host side of a witx interface. It is invoked as a Rust procedural macro.

Wiggle is not specialized to any particular WebAssembly runtime. It is usable in at least Wasmtime and Lucet.

Learning more

Read the docs on docs.rs.

There are child crates for integrating with Wasmtime and Lucet.

The wasi-common crate is implemented using Wiggle and the wasmtime-wasi crate integrates wasi-common with the Wasmtime engine.

Andrew Brown wrote a great blog post on using Wiggle with Wasmtime.