cargo leptos watch/build with --split and --wasm-debug

[mat813]

It seems when building with --split, the resulting splitted wasm files don't have all the debugging symbols and source maps.

[WorldSEnder]

See WorldSEnder/wasm-split-prototype#7. The main obstruction is parsing the various debug sections and putting them into the correct split module. Relocations should be present to target any function and data indices, it's more or less about copying over the correct parts from the input. I'd be happy about a PR.

The name section should already be preserved, the other debug sections are currently omitted.

[mat813]

I see. I am asking because after adding a few LazyRoutes, it seems I can't build without --split any more, and I get some strange panic in some edge case.

When I build witnout --split, I get this error:

Uncaught (in promise) TypeError: Le spécificateur « __wasm_split_placeholder__ » était un spécificateur simple, mais n’a pas été remappé. Les spécificateurs relatifs de modules doivent commencer par « ./ », « ../ » ou « / ».

It's in french, sorry but it just says that local js modules need to start with ./ ../ or /, I think it's basically because the .js file that is generated starts with this:

import * as __wbg_star0 from '__wasm_split_placeholder__';
import * as __wbg_star1 from 'env';

let wasm;

It feels like it is some leftover artifact from the build that did not get cleaned up.