Flavors

yaws reference runtime implementations are called flavors.

yaws provides initially the reference runtimes or flavors for:

• Lunatic Rust+Erlang+WebAssembly Guest-side
• io_uring Linux io_uring Completion Host-side

Binary Runtime

User can run any of the flavors directly as binary through cfg(yaws_flavor).

This cfg can be either supplied through .cargo/config.toml or through --cfg via the top-level binary.

io_uring Binary

$ RUSTFLAGS="--cfg yaws_flavor=\"io_uring\"" cargo run --bin yaws

Lunatic Binary

$ RUSTFLAGS="--cfg yaws_flavor=\"lunatic\"" cargo run --bin yaws --target wasm32-wasi

Library Driver

User can implement the I/O traits in conjuction with the abstract machines implementing HTTP.

Refer to the API documentation or see the existing reference runtimes or flavors for examples.