Nuget warnings in fsi are emitted to stdout and cannot be suppressed with --quiet

[legezam]

in F# interactive, Nuget warnings are not suppressed when using --quiet flag.

Repro steps

using this fsx script:

#r "nuget:Dmx.Amyris.Bio"


let [| |] = [||]

1. dotnet fsi --quiet foo.fsx
2. observe that nuget warnings are emitted to stdout instead of stderr, regardless whether you add --quiet flag or not:

/home/legezam/.packagemanagement/nuget/Projects/110555--97ce5992-5bc5-4645-82e6-4431e11b5756/Project.fsproj : warning NU1608: Detected package version outside of dependency constraint: Dmx.Amyris.Bio 2.0.32 requires FSharp.Core (>= 6.0.0 && < 7.0.0) but version FSharp.Core 8.0.300 was resolved.
/home/legezam/.packagemanagement/nuget/Projects/110555--97ce5992-5bc5-4645-82e6-4431e11b5756/Project.fsproj : warning NU1608: Detected package version outside of dependency constraint: Dmx.Amyris.Bio 2.0.32 requires FSharp.Core (>= 6.0.0 && < 7.0.0) but version FSharp.Core 8.0.300 was resolved.

This makes it impossible to create a unix like command that prints its results to stdout because fsi puts garbage to stdout.

Expected behavior

1. maybe the nuget warnings should go to stderr by default
2. even if they don't, --quiet should make them go away as per the promises in fsi help

Actual behavior

F# compiler warnings are not emitted correctly, nuget warnings go to stdout.

Known workarounds

Found no workarounds.

Related information

This happens on Ubuntu linux for me but i suppose the issue is general.

Thanks!

[T-Gro]

F# should translate the --quiet flag into equivalent information for project created on the background, to make it silence nuget warnings as well (which are not coming from F# processing).

I assume /verbosity:quiet could work here, instead of NoWarn different NU**** codes.

[baronfel]

Even with a quiet verbosity you will still see the warnings - silent mode is only truly silent on success cases. I don't think it's reasonable to try and denylist specific nowarns either.

[goswinr]

can this be toggled here:

fsharp/src/FSharp.DependencyManager.Nuget/FSharp.DependencyManager.Utilities.fs

Line 193 in a2f2b00

psi.RedirectStandardOutput <- true

or here:

fsharp/src/FSharp.DependencyManager.Nuget/FSharp.DependencyManager.Utilities.fs

Line 207 in a2f2b00

p.OutputDataReceived.Add(fun a -> outputDataReceived a.Data)

?

[majocha]

can this be toggled here:

You'd need to pass the noFeedback flag somehow, which probably means extending the DependencyManager api (?).