Relay Compiler Playground

Compile parts of the Rust Relay compiler to Wasm and expose them as a web-based playground.

Build The Wasm Module

Ensure you have wasm-pack >= 0.10.0 installed. Type cargo install wasm-pack if you don't.

To build the wasm module:

bash

cd relay-compiler-playground
wasm-pack build --target web

I had to do rustup component add rust-src as well.

This will create the NPM module in relay-compiler-playground/pkg.

Publishing

Bump the version in cargo.toml. This will be used for the generated package.json.

Build (see above)

Finally, publish:

bash

cd pkg
npm publish

Testing

bash

cd relay-compiler-playground
wasm-pack build --target nodejs # NOTE: We build for node in tests and web to publish
yarn
yarn test

Manually Testing

Follow the steps above for "Build The Wasm Module".

bash

cd relay-compiler-playground/pkg
yarn link

cd ~/fbsource/xplat/js/RKJSModules/Libraries/Relay/oss/__github__/website
yarn link relay-compiler-playground

# You may need to clear Docusaurus cache
npx docusaurus clear

# Launch the website in dev mode
yarn start

Navigate to http://localhost:3000/compiler-explorer