Unable to use credential provider in a multistage docker build using a dotnet core 3.0 image about artifacts-credprovider HOT 6 CLOSED

Hi @markphillips100,

There is not currently a version of the credential provider built for .NET Core 3.0 preview. While not on our immediate backlog, we are currently investigating different possible ways of distributing the credential provider (besides the current install script), and runtime support will certainly be a decision factor.

Is there anything blocking you from building and running your own .NET Core 3.0 version of the credential provider? If not, I'm happy to help with doing so if you are having issues.

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Dup of #51 @shubham90 fyi

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Sorry for my late response @zarenner . I'll look into building my own core 3 preview version for now. If I get into issues I'll be in touch.

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@zarenner my attempts at creating a .net core 3-preview5 version have stumbled a little so wonder if you can help?

The solution builds fine in VS2019 16.1.0. All tests pass.

I'm getting an error from an Azure DevSpaces .vsts-ci.yaml build (PushNupkg:false) which occurs during the Build CredentialProvider task. Here's a snippet of the log:

/opt/hostedtoolcache/dncs/3.0.100-preview5-011568/x64/sdk/3.0.100-preview5-011568/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.Sdk.targets(145,5): error MSB4018: The "GenerateDepsFile" task failed unexpectedly. [/home/vsts/work/1/s/CredentialProvider.Microsoft/CredentialProvider.Microsoft.csproj]
/opt/hostedtoolcache/dncs/3.0.100-preview5-011568/x64/sdk/3.0.100-preview5-011568/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.Sdk.targets(145,5): error MSB4018: System.TypeLoadException: Could not load type of field 'Microsoft.NET.Build.Tasks.DependencyContextBuilder2:_filteredPackages' (12) due to: Could not resolve type with token 01000020 from typeref (expected class 'NuGet.Packaging.Core.PackageIdentity' in assembly 'NuGet.Packaging, Version=5.1.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35') assembly:NuGet.Packaging, Version=5.1.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35 type:NuGet.Packaging.Core.PackageIdentity member:(null) [/home/vsts/work/1/s/CredentialProvider.Microsoft/CredentialProvider.Microsoft.csproj]

Setup and changes
I forked the repo and branched here. If you compare you'll see the changes I've made but in summary I did the following:

1. SDK installer version changed to 3.0.100-preview5-011568
2. Target netcoreapp3.0 in csproj file, and changed all occurrences of netcoreapp2.1 to netcoreapp3.0.

The error occurred with just those changes so I also did the following but the error occurs still:

3. Updated NuGet.Protocol reference to 5.1 - not sure this is necessary or not
4. Install NuGet 5.1 - again, not sure this is necessary or not.

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Looks like you're hitting this issue (all same issue, just different info about it):

• NuGet/Home#7956
• https://developercommunity.visualstudio.com/content/problem/481018/resolvepackageassets-task-failed.html
• https://rider-support.jetbrains.com/hc/en-us/articles/360004180039-Incompatible-versions-of-Mono-MSBuild-and-NET-Core-SDK-MSB4018-

I've confirmed that building using dotnet (instead of the MSBuild task) succeeds:
https://dev.azure.com/zlrenner/ArtifactsCredProviderUnofficial/_build/results?buildId=410&view=logs&j=12f1170f-54f2-53f3-20dd-22fc7dff55f9

Let me know if you have trouble with the same.

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Thanks @zarenner, builds fine now after switching to dotnet cli. I should be good from here.

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