Web Assembly Component Model Pramtive

README.md

ref

https://nulab.com/ja/blog/nulab/webassembly-component-model/

setup

$ cargo -V
cargo 1.78.0 (54d8815d0 2024-03-26)
$ rustup update
$ cargo -V
cargo 1.83.0 (5ffbef321 2024-10-29)
$ cargo install --locked wasm-tools
$ wasm-tools --version
wasm-tools 1.221.2

init

$ touch module-example.wat
$ wasm-tools parse module-example.wat -o module-example.wasm
$ wasm-tools dump module-example.wasm
$ file module-example.wasm

$ touch component-example.wasm
$ wasm-tools parse component-example.wat -o component-example.wasm
$ wasm-tools dump component-example.wasm
$ file component-example.wasm

wasm time

$ curl https://wasmtime.dev/install.sh -sSf | bash
$ exec $SHELL -l
$ wasmtime -V
wasmtime 27.0.0 (8eefa236f 2024-11-20)

component-example.wat

(component
  (core module $Mod
    (func (export "mod-main") (result i32)
      (i32.const 1)
    )
  )
  (core instance $m (instantiate $Mod))
  (func $main_lifted (result (result)) (canon lift (core func $m "mod-main")))
  (component $Comp
    (import "main" (func $g (result (result))))
    (export "run" (func $g))
  )
  (instance $c (instantiate $Comp
    (with "main" (func $main_lifted))
  ))
  (export "wasi:cli/[email protected]" (instance $c))
)

module-example.wat

(module)