Ubuntu 22.04 LTS: won't be able to install dotnet-sdk-3.1 (only 6.0)

[Mizux]

So currently, we can't install dotnet sdk on Ubuntu 22.04 => waiting for Microsoft to release it.

workaround: install it from script -_-.

blocking by:

• Add support for Ubuntu 22.04 (Jammy Jellyfish) - April 2022 Release Date dotnet/core#7038
• cmake(dotnet): Be able to disable a Target Framework Moniker (5f1cb90)
• Update tools/docker to disable .Net SDK 3.1 on Ubuntu 22.04
  Dev Note:

$ apt-get install -yq  dotnet-sdk-3.1 dotnet-sdk-6.0
...
The following information may help to resolve the situation:

The following packages have unmet dependencies:
 dotnet-runtime-deps-3.1 : Depends: libssl1.0.0 but it is not installable or
                                    libssl1.0.2 but it is not installable or
                                    libssl1.1 but it is not installable
 dotnet-runtime-deps-6.0 : Depends: libssl1.0.0 but it is not installable or
                                    libssl1.0.2 but it is not installable or
                                    libssl1.1 but it is not installable

[richlander]

Hey @Mizux -- I wrote this comment about the current situation. I hope it clarifies how to approach .NET on Ubuntu 22.04.

dotnet/core#7038 (comment)

[Mizux]

@richlander Thanks for the update !

My take away:

• If I follow correctly .Net 3.1 won't be available on ubuntu 22.04 LTS since the distro only support openSSL 3.
• Fortunately now or-tools allow to enable/disable support for sdk 3.1 or sdk 6.0 => just need to adapt CI and release script accordingly...
• So we could provide support for both when distro support it or only with a net6.0 support when needed.

[richlander]

I think you have it. Happy to help when you folks need it. You can just at-mention me.

[StefanBruens]

Another issue with dotNet 3.1 (as provided by Microsoft) is the missing compatibility with ICU >= 70, as can be seen here:
https://github.com/google/or-tools/runs/6644968336?check_suite_focus=true

Upstream reference:
dotnet/runtime#34095

[richlander]

Is it possible to move to .NET 6?