Wasm support

[joreilly]

Any plans to add Wasm support? cc @bashor

[fzhinkin]

@joreilly Sorry for the long reply.

I'm considering supporting Wasm target at some point.
It can not be enabled by just plunking extra target into build configs, and it requires additional effort, so I'd rather postpone the support for later.

Do you already have use cases for kotlinx-io in Wasm targeting projects? Could you please provide more details? Thanks!

[joreilly]

Hi, thanks for the reply. I see this more as enabler for projects that start to use this library to support Wasm. For example I believe Apollo is evaluating its use. cc @martinbonnin

[martinbonnin]

Indeed, we've had requests for Wasm already (issue).

[joreilly]

btw you probably saw this already square/okio#1203

[fzhinkin]

@joreilly @martinbonnin thank you for the details! I'll investigate what needs to be done to support Wasm then.

[fzhinkin]

There is not so much to do in order to start building Wasm artifacts:

• upgrade Kotlin to 1.9.0
• solve issues w/ benchmarks module after updating to 1.9.0
• enable Wasm target, provide stub implementations for some expects (and there will be no files support at all, ATM)

See: https://github.com/Kotlin/kotlinx-io/pull/188/files

But there is a bug https://youtrack.jetbrains.com/issue/KT-60212 affecting the project.
I implemented a workaround, but neither it looks good, nor I can assure that there will be no other related issues. So I'd rather wait until 1.9.20 and enable Wasm target then.

[fzhinkin]

Everything (except file systems) works fine after updating to 1.9.10.