Failing WebAssembly.instantiate()

[qarlosalberto]

I'm using @yowasp/yosys version 0.43.36-dev.746 in TypeScript:

const dynamicImport = eval('import("@yowasp/yosys")');
const { runYosys } = await dynamicImport;
const result1 = await runYosys(["--version"]);

The import works fine, but I have an error running Yosys:

TypeError: WebAssembly.instantiate(): Argument 0 must be a buffer source
    at init (/home/carlos/repo/vscode-terosHDL/node_modules/@yowasp/yosys/gen/bundle.js:4849:36)

[whitequark]

Why use eval() there?

[whitequark]

In any case, the reason it breaks is likely that @yowasp/yosys/gen/resources-yosys.js has this:

export const modules = {
    "yosys.core.wasm": new URL("./yosys.core.wasm", import.meta.url),
    "yosys.core2.wasm": new URL("./yosys.core2.wasm", import.meta.url),
    "yosys.core3.wasm": new URL("./yosys.core3.wasm", import.meta.url),
    "yosys.core4.wasm": new URL("./yosys.core4.wasm", import.meta.url),
};

So whatever it is you're doing with import probably breaks import.meta.url.

[qarlosalberto]

Because I'm using commonjs and tsc converts imports to require. With eval I can skip that.

[whitequark]

YoWASP packages are ESM-only. I think that running a bundler on @yowasp/yosys first might help.

[qarlosalberto]

What do you mean?

[whitequark]

The new URL(..., import.meta.url) construct is recognized by some bundlers, like esbuild, which can transform it to another construct that is supported by your environment.

[qarlosalberto]

Ah okok. Thanks!!