[rescript@10.1.0-rc.5] No working prebuilt ReScript compiler

[DZakh]

I've updated rescript to the 10.1.0-rc.5 because of the issue #5638. And it works well, but the CI build took much longer. It can't find the prebuild ReScript compiler and starts building it in CI with other missing dependencies.

It's the only blocker with starting using 10.1.0-rc.5 at Carla right now. Can I help with fixing the issue somehow?

[DZakh]

Hail the cache, it works well when it hits. But still would be nice to have a prebuilt version.

Looks like the line is failing, don't know how it's related to the new rescript version yet.
https://github.com/rescript-lang/rescript-compiler/blob/85028cea2a4947555f7bd8a4dcace2f79c33a50b/scripts/install.js#L132

[DZakh]

I've found the related PR #5533

Now the workflow uses ubuntu-20.04, that might be the reason.

[DZakh]

@cknitt Can the PR be done a little bit later #5626 ?

[cknitt]

Hmm, I don't know. In theory we could revert this change for the 10.1 release branch and keep it for 11.x only, but that will just postpone the problem a little. The 18.04 Github-hosted runner is already deprecated and will cause intermittent build failures, and, after 2023/04/01, it will not be available anymore at all. What if we need to do a 10.1.x maintenance release then?

If we want Ubuntu 18.04 available for the longer term, somebody would need to deploy and maintain a self-hosted Github actions runner for it.

/cc @cristianoc

[cristianoc]

Indeed postponing the change seems complicated.

[DZakh]

Thank you. Kind of an expected answer. The problem is that we use Vercel, and I couldn't figure out how to configure the OS used for builds.
I'll share a solution if manage to make it work.

[zth]

Do we understand what the underlying problem is here...?

[cknitt]

Yes, see #5533.

[zth]

Right. Glibc ✝️

[cknitt]

@DZakh I discussed this again with @cristianoc as more people have reported being affected by this.

We have decided to indeed revert this change for the 10.1 release branch.
For 11.x, I hope to be able to provide statically linked Linux binaries.

[cknitt]

@DZakh There is now a version 10.1.1 out with statically linked Linux binaries.

(It is currently still set to next on npm as there are some communication/docs tasks left for the official 10.1 release announcement, see rescript-lang/rescript-lang.org#633.)