Optional workloads do not work in .NET 8 builds

[jonathanpeppers]

Context: dotnet/runtime#80401

dotnet/sdk@f5cb7e3 introduced a change that would make microsoft.net.workload.mono.toolchain an outdated id in order to work around manifest errors when older previews of the .NET 7 SDK were installed.

So for optional workloads to work at all, on CI we had to rename folders such as:

https://github.com/dotnet/maui/blob/eea6fea9897faf736306aeb4c250dafedaac18c9/src/DotNet/DotNet.csproj#L162-L170

Filing this issue to track this problem, as it won't be solved until dotnet/runtime#80401 is merged and flows to dotnet/installer.

At that point we can test the changes further downstream in xamarin-android, xamarin-macios, and dotnet/maui.

[marcpopMSFT]

Runtime updated their workload ID, I think we just need their workloads to flow and get picked up. CC @steveisok in case there's an update there.

[jonathanpeppers]

I think we're close, they just wanted me to file an issue somewhere to track this.

[jonathanpeppers]

This is now waiting on this to land: #15366

[lewing]

#1566 is in now

[jonathanpeppers]

I'm now trying the latest dotnet/installer builds at:

dotnet/android#7755

I had to manually fix up $(MicrosoftNETWorkloadEmscriptenCurrentManifest80100alpha1Version) and related values.

[jonathanpeppers]

Wait, so we have:

• Microsoft.NET.Workload.Emscripten.net6.Manifest-8.0.100-alpha.1
• Microsoft.NET.Workload.Emscripten.net7.Manifest-8.0.100-alpha.1
• Microsoft.NET.Workload.Emscripten.Current.Manifest-alpha.1
• Microsoft.NET.Workload.Mono.Toolchain.net6.Manifest-8.0.100-alpha.1
• Microsoft.NET.Workload.Mono.Toolchain.net7.Manifest-8.0.100-alpha.1
• Microsoft.NET.Workload.Mono.Toolchain.Current.Manifest-8.0.100-alpha.1

I guess I need more changes in our build to account for the different version bands in .NET 8.

[jonathanpeppers]

dotnet/android#7755 is merged.

When the current build completes, we can try it in dotnet/maui next.

[lewing]

they will be preview.1 packs once we can produce preview.1 packs, the manual renaming as things flow is a mess

[lewing]

dotnet/runtime#81398 dotnet/runtime#81399

[jonathanpeppers]

After this one goes in, we can probably branch all the repos for dotnet/maui:

dotnet/maui#13040

[marcpopMSFT]

@lewing @jonathanpeppers what is left to make this work?

[jonathanpeppers]

I think main is working, but it does not appear to be working in release/8.0.1xx-preview1 yet:

dotnet/android#7760 (comment)