Cannot restore NuGet packages using Paket in Azure Pipelines (Artifacts feed)

Question

I'm trying to define a pipeline that builds for .NET Core solution. Dependencies are managed by Paket. A dependency is downloaded from Azure Artifacts feed.

In first stages I thought the problem was Paket and I was able to define a pipeline that builds without it (using a private packages source, our private feed).

Once I fixed Paket issues I got problems trying to get dotnet restore working.

This my actual YML definition:

trigger:
- none

pool:
  vmImage: 'windows-latest'

steps:
  - task: UseDotNet@2
    inputs:
      packageType: 'sdk'
      version: '3.1.x'

  - powershell: |
      cd ..
      dotnet tool install -g paket

  - task: setCredentialManager@0

  - task: PaketRestore@0
    inputs:
      PaketPath: '.paket'

  - task: paketCredentialCleanup@0

  # I'm not sure the following task is necessary
  - task: PowerShell@2
    inputs:
      filePath: './installcredprovider.ps1'

  - task: NuGetCommand@2
    inputs:
      command: 'restore'
      restoreSolution: '**/*.sln'
      feedsToUse: 'config'
      nugetConfigPath: './NuGet.config'

  - task: CmdLine@2
    inputs:
      script: 'dotnet restore'

  - task: DotNetCoreCLI@2
    inputs:
      command: 'build'
      projects: '*.csproj'

The NuGetCommand@2 restore task fails with this log:

NuGet Version: 5.4.0.6315
EXEC : Standard error : It was not possible to find any compatible framework version [d:\a\1\s\ArtifactsVs.csproj]
MSBuild auto-detection: using msbuild version '16.5.0.12403' from 'C:\Program Files (x86)\Microsoft Visual Studio\2019\Enterprise\MSBuild\Current\bin'. Use option -MSBuildVersion to force nuget to use a specific version of MSBuild.
EXEC : Standard error : It was not possible to find any compatible framework version [d:\a\1\s\ArtifactsVs.csproj]
MSBuild P2P timeout [ms]: 120000
EXEC : Standard error : It was not possible to find any compatible framework version [d:\a\1\s\ArtifactsVs.csproj]
C:\Program Files (x86)\Microsoft Visual Studio\2019\Enterprise\MSBuild\Current\bin\msbuild.exe "C:\Users\VssAdministrator\AppData\Local\Temp\NuGetScratch\rjysskyy.m01.nugetinputs.targets" /t:GenerateRestoreGraphFile /nologo /nr:false /v:q /p:NuGetRestoreTargets="C:\Users\VssAdministrator\AppData\Local\Temp\NuGetScratch\1cpdh2ma.wgd.nugetrestore.targets" /p:RestoreUseCustomAfterTargets="True" /p:RestoreTaskAssemblyFile="C:\hostedtoolcache\windows\NuGet\5.4.0\x64\nuget.exe" /p:RestoreSolutionDirectory="d:\a\1\s\\" /p:RestoreConfigFile="d:\a\1\s\NuGet.config" /p:SolutionDir="d:\a\1\s\\" /p:SolutionName="ArtifactsVs"
EXEC : Standard error : It was not possible to find any compatible framework version [d:\a\1\s\ArtifactsVs.csproj]
NuGet.CommandLine.ExitCodeException: Exception of type 'NuGet.CommandLine.ExitCodeException' was thrown.
EXEC : Standard error : It was not possible to find any compatible framework version [d:\a\1\s\ArtifactsVs.csproj]
   at NuGet.CommandLine.MsBuildUtility.<GetProjectReferencesAsync>d__6.MoveNext()
EXEC : Standard error : It was not possible to find any compatible framework version [d:\a\1\s\ArtifactsVs.csproj]
--- End of stack trace from previous location where exception was thrown ---
EXEC : Standard error : It was not possible to find any compatible framework version [d:\a\1\s\ArtifactsVs.csproj]
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
EXEC : Standard error : It was not possible to find any compatible framework version [d:\a\1\s\ArtifactsVs.csproj]
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
d:\a\1\s\.paket\Paket.Restore.targets(219,5): error MSB3073: The command ""paket" restore --project "d:\a\1\s\ArtifactsVs.csproj" --output-path "obj" --target-framework "netcoreapp3.1"" exited with code 1. [d:\a\1\s\ArtifactsVs.csproj]
   at NuGet.CommandLine.RestoreCommand.<GetDependencyGraphSpecAsync>d__68.MoveNext()

--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at NuGet.CommandLine.RestoreCommand.<DetermineInputsFromMSBuildAsync>d__63.MoveNext()
##[error]The nuget command failed with exit code(1) and error(EXEC : Standard error : It was not possible to find any compatible framework version [d:\a\1\s\ArtifactsVs.csproj]
EXEC : Standard error : It was not possible to find any compatible framework version [d:\a\1\s\ArtifactsVs.csproj]
EXEC : Standard error : It was not possible to find any compatible framework version [d:\a\1\s\ArtifactsVs.csproj]
EXEC : Standard error : It was not possible to find any compatible framework version [d:\a\1\s\ArtifactsVs.csproj]
EXEC : Standard error : It was not possible to find any compatible framework version [d:\a\1\s\ArtifactsVs.csproj]
EXEC : Standard error : It was not possible to find any compatible framework version [d:\a\1\s\ArtifactsVs.csproj]
EXEC : Standard error : It was not possible to find any compatible framework version [d:\a\1\s\ArtifactsVs.csproj]
EXEC : Standard error : It was not possible to find any compatible framework version [d:\a\1\s\ArtifactsVs.csproj]
EXEC : Standard error : It was not possible to find any compatible framework version [d:\a\1\s\ArtifactsVs.csproj]
d:\a\1\s\.paket\Paket.Restore.targets(219,5): error MSB3073: The command ""paket" restore --project "d:\a\1\s\ArtifactsVs.csproj" --output-path "obj" --target-framework "netcoreapp3.1"" exited with code 1. [d:\a\1\s\ArtifactsVs.csproj])
##[error]Packages failed to restore
Finishing: NuGetCommand

Anyway omitting it, dotnet restore fails the same.

Source of script installcredprovider.ps1 is here.

Repository can be downloaded from here (feed URL is partly obfuscated).

Thanks in advance to anyone who wants to help!

Answer 1

I created a test project for troubleshooting. And i found .NET Core sdk 2.0.0 is needed for Paket.

If dotnet core 2.0.0 is not installed, Nuget restore task will fail with above error "It was not possible to find any compatible framework version". And paket retore task will fail with error The framework 'Microsoft.NETCore.App', version '2.0.0' was not found.

After i installed .NET Core sdk 2.0.0 with UseDotNet task. Both Nuget restore and paket restore ran successfully. Please check below yaml:

pool:
  vmImage: 'windows-latest'

steps:

  - task: UseDotNet@2
    inputs:
      packageType: 'sdk'
      version: '2.0.0'

  - task: UseDotNet@2
    inputs:
      packageType: 'sdk'
      version: '3.1.x'

  - powershell: |
      cd ..
      dotnet tool install -g paket

  - task: setCredentialManager@0

  - task: PaketRestore@0
    inputs:
      PaketPath: '.paket'

  - task: paketCredentialCleanup@0

  # - task: PowerShell@2
  #   inputs:
  #     filePath: './installcredprovider.ps1'

  # - task: NuGetToolInstaller@1
  #   inputs:
  #     versionSpec: 5.x

  - task: NuGetCommand@2
    inputs:
      command: 'restore'
      restoreSolution: '**/*.sln'
      feedsToUse: 'config'
      nugetConfigPath: './NuGet.config'

For above pipeline, Task setCredentialManager@0 is also must, but the powershell task to run ./installcredprovider.ps1 is not needed.

And i also found above pipeline will fail to run on agent vs2017-win2016, for an older version msbuild in vs2017 is invoked while executing nuget restore command.

Paket restore, dotnet restore and nuget restore they all do the same thing(dotnet restore and nuget restore will call paket restore). You can only keep one of them in your pipeline. I tested and my project was successfully built with either one of them.

Hope above helps!