Tool to create and package WASM WASI-based browser service workers

This tool provides JavaScript glue for browser service workers built with wasi-worker library.

Installation

Note: wasi-worker-cli 0.5+ requires rustc 1.41+ as it bases on wasi-snapshot-preview1 now

cargo install wasi-worker-cli

Usage

```shell % wasiworker help
wasi-worker-cli 0.2.0 Install JavaScript glue code and WASI toolset for WASI worker to function.

USAGE: wasiworker

FLAGS: -h, --help Prints help information -V, --version Prints version information

SUBCOMMANDS: deploy Executes cargo build --bin worker and deploys with glue code under ./dist help Prints this message or the help of the given subcommand(s) install Install static files and worker.rs template in current crate ```

  1. Install wasiworker template considering current directory is a crate root

wasiworker install

It will create bin/worker.rs and place relevant target and dependencies in current Cargo.toml. Will panic if Cargo.toml was not found.

  1. Build and deploy worker under ./dist with all depencies

wasiworker deploy

It will run cargo build --release --target wasm32-wasi --bin worker, copy resulting worker.wasm under ./dist and copy JavaScript glue code under ./dist/worker.js. It will also add wasm_transformer to be able to run in browser.

Note: currently it uses wasm-gc tool to significantly cut resulting wasm file size. - [ ] Look at converting to cargo wasi subcommand

Building/hacking

Code structure:

Install the cli package from the crate manually

cargo install --path . --force

It will also embed whaever version of JS glue was placed under the ./dist subfolder.

Build JS glue for development

cd js npm install npm run build:dev

Build JS glue for distribution

cd js npm install npm run build

Attributions

JavaScript glue code is built on top of following great packages. Thanks https://wasmer.io/ for their great work on making WASI easy to use.

TODO