Support for wasm and asmjs ?

[lilianmoraru]

I try to cross-compile tantivy for the web with(I initially tried directly through "source emsdk_env.sh" + cross-compiling - same results but I wanted to mention the projects to make it easier for you to test) wargo,2(wasm) and cargo-web(asmjs) and it seems that the current blocking point is that nix does not compile on those platforms.

It is clear that this is because of some platform-specific cfgs(and of course no code for an API that does not map 1-on-1 with the POSIX API):

error[E0432]: unresolved import `self::os`
 --> src/features.rs:1:15
  |
1 | pub use self::os::*;
  |               ^^ Could not find `os` in `self`

error[E0432]: unresolved import `self::platform`
   --> src/sys/ioctl/mod.rs:243:15
    |
243 | pub use self::platform::*;
    |               ^^^^^^^^ Could not find `platform` in `self`

Do you guys think that it is feasible to make nix compatible with these platforms(the Emscripten API is inspired by POSIX)?
If yes, could you please consider adding support for the asmjs-unknown-emscripten/wasm32-unknown-emscripten targets? :)

[Susurrus]

I've wondered about support for nix, considering nix exposes APIs not covered by POSIX I always wondered if the JS crowd would try to compile it. I don't think any of us are against it, but we are also very much a scratch-your-own-itch library and "we" the devs do little active development outside of areas we care about, but do review PRs. We'd definitely would love PRs to support additional platforms, so feel free to file own if you can. If you can't, I fear you'll be waiting a while with this request and almost no one goes through issues that aren't bugs to resolve them.

[lilianmoraru]

@Susurrus Well, I like that you were upfront about this :)

I personally don't have much free time to work on something like this. :(

[Susurrus]

Would you be willing to help test and possibly mentor someone to do this? I could label it a mentored issue, and if you wanted to post it to the TWiR section on things people want help with, maybe it could actually be done relatively soon.