`nuget: 2: mono: not found` error on `nuget pack` command in Ubuntu LTS 24.04.1

[Saibamen]

See this GH Action: https://github.com/gandalan/idas-client-libs/actions/runs/11352047581/job/31573952933?pr=432

On Ubuntu LTS 22.04.5 it works without any problem: https://github.com/Saibamen/idas-client-libs/actions/runs/11352019685/job/31573860174?pr=6

See: actions/runner-images#10636

[zivkan]

https://learn.microsoft.com/en-us/nuget/resources/nuget-faq#does-nuget-support-mono-

NuGet can run on Unix operating systems using mono, but it is not officially supported by NuGet's Support Policy.

There are a few issues in the NuGet/Home repo about specific nuget.exe commands that are not available in the dotnet CLI. An equivalent to nuget install Some.Package is highest on our priorities. If you use anything else from nuget.exe that's not supported by the .NET SDK, I encourage you to find the Home repo issue and upvote it to help us prioritize efforts.

[dpogue]

This action fails to install a usable NuGet on ubuntu-latest (ubuntu-24.04) GitHub Actions runners.

[mehdihadeli]

I have the same issue on ubuntu-latest (ubuntu-24.04)

[Enormus]

This action fails to install a usable NuGet on ubuntu-latest (ubuntu-24.04) GitHub Actions runners.

Made worse by the ongoing GitHub migration:
"We will migrate the ubuntu-latest label to ubuntu 24 starting on December 5, 2024 and ending on January 17, 2025. "
https://github.blog/changelog/2024-11-05-notice-of-breaking-changes-for-github-actions

[jeffkl]

NuGet.exe is a .NET Framework application and will only work on Windows machines or non-Windows machines that have Mono. Since Mono is officially deprecated, it will most likely no longer be installed by default on CI machines. Perhaps a workaround for now is to manually install Mono as part of your CI process? This GitHub action will not be adding support for installing Mono on your behalf, as its sole responsibility is to download NuGet.exe and make it available for a hosted build.

If possible, we suggest moving to using the .NET SDK which is cross platform and supports most of the same commands via dotnet nuget. https://learn.microsoft.com/nuget/reference/dotnet-commands

[dpogue]

If possible, we suggest moving to using the .NET SDK which is cross platform and supports most of the same commands via dotnet nuget. https://learn.microsoft.com/nuget/reference/dotnet-commands

Is it possible to use dotnet nuget to download and publish .nupkg files for C++ libraries to GitHub Package Registry with vcpkg? That's our only use case for NuGet in our CI system

[karamem0]

In my environment, failed with a different message. (Using ubuntu-latest)

Error: The process '/opt/hostedtoolcache/nuget.exe/5.11.6/x64/nuget' failed with exit code 127

ubuntu-24.04 works for me.

[Enormus]

https://learn.microsoft.com/nuget/reference/dotnet-commands

Thank you! That sounds reasonable.