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@as-harness/wasmtime

v0.6.0

Published

Rust/Node-API host implementation built on `wasmtime`.

Downloads

297

Vulnerabilities

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Links

Git

Maintainers

jtennerjtenner

Keywords

Readme

harness/wasmtime

Rust/Node-API host implementation built on wasmtime.

What lives here

  • src/lib.rs — native addon entry and wrapper around Wasm execution
  • index.cjs — JS Harness API and shared start.cjs orchestration
  • scripts/build.mjs — local build helper with platform-specific linker setup
  • test/smoke.host.cjs — shared smoke + CLI smoke fixture

Scope

  • published as @as-harness/wasmtime plus per-platform binary packages
  • same shared contract and callback suite as js and wazero
  • supports coverage declaration/imports, merged coverage snapshots, and host-owned uvu/assert fixture / snapshot artifacts
  • decodes and surfaces structured debug payload events for rewritten abort(...) / trace(...) output through the shared host callback contract

Build and Test

Build requirement: Rust 1.94.0 stable or newer.

cd harness/wasmtime
node ./scripts/build.mjs
npm test

Notes

  • native package source verification remains in CI source-host matrix.
  • source-host CLI smoke proof builds a Node-targeted CLI bundle and runs that bundle under Node 25.8.1 instead of invoking bun run ./cli/index.ts directly.
  • the bundled source CLI uses AS_HARNESS_SOURCE_CLI_REPO_DIR during CI smoke so the Node-targeted bundle can still resolve the repo-local host package.
  • public npm publication ships the per-platform binary packages that the @as-harness/wasmtime meta package resolves through optionalDependencies.
  • the tracked source-build dependency inventory lives in licenses/wasmtime/THIRD_PARTY_INVENTORY.md and is generated from cargo metadata --format-version 1 --locked.