NU1100：无法解析“.NETStandard,Version=v1.3”的“System.Reflection.TypeExtensions (>= 4.5.1)”

Question

我正在尝试 to migrate 我的从 AppVeyor 到 Azure DevOps 的小型 OSS 项目，并且几乎完成了所有工作，但现在 getting this error 在 dotnet restore 步骤：

NU1100：无法解析“.NETStandard,Version=v1.3”的“System.Reflection.TypeExtensions (>= 4.5.1)”。

尽管我清楚地看到 System.Reflection.TypeExtensions 支持 .NET Standard 1.3：

.NETStandard 1.3
    System.Reflection (>= 4.3.0)
    System.Resources.ResourceManager (>= 4.3.0)
    System.Runtime (>= 4.3.0)

我做错了什么？

更新：my YAML file 看起来像这样：

trigger:
- master

pool:
  vmImage: 'windows-2019'

variables:
  solution: 'JWT.sln'
  buildConfiguration: 'Release'
  buildPlatform: 'Any CPU'
  dotNetVersion: '2.2.106'

steps:
- task: DotNetCoreInstaller@0
  displayName: Install .NET Core v$(dotNetVersion)
  inputs:
      version: $(dotNetVersion)

- task: DotNetCoreCLI@2
  displayName: 'Restore NuGet packages'
  inputs:
    command: 'restore'
    projects: '**/*.csproj'
    feedsToUse: config
    nugetConfigPath: NuGet.config

- task: DotNetCoreCLI@2
  displayName: 'Build solution'
  inputs:
    command: 'build'
    projects: '$(solution)'
    configuration: '$(buildConfiguration)'

- task: DotNetCoreCLI@2
  displayName: Run .NET Core tests
  inputs:
    command: 'test'
    projects: 'tests/**/JWT.Tests.Core.csproj'
    arguments: ' -c $(buildConfiguration) --no-build --no-restore'
    testRunner: VSTest
    testResultsFiles: '**/*.trx'
    testResultsFormat: 'xUnit'
    failTaskOnFailedTests: true

- task: DotNetCoreCLI@2
  displayName: Run .NET Framework tests
  inputs:
    command: 'test'
    projects: 'tests/**/JWT.Tests.NetFramework.csproj'
    arguments: ' -c $(buildConfiguration) --no-build --no-restore'
    testRunner: VSTest
    testResultsFiles: '**/*.trx'
    testResultsFormat: 'xUnit'
    failTaskOnFailedTests: true

- task: DotNetCoreCLI@2
  displayName: Package NuGet package
  inputs:
    command: pack
    packagesToPack: 'src/**/*.csproj'
    configuration: $(BuildConfiguration)
    nobuild: true

- task: PublishBuildArtifacts@1
  displayName: Publish build artifacts

更新 2：我尝试分别恢复 .NET Core 和 .NET Framework 的包，但没有成功：

  displayName: 'Restore NuGet packages for .NET Core'
  inputs:
    command: 'restore'
    projects: '**/*.csproj'
    feedsToUse: config
    nugetConfigPath: NuGet.config

- task: NuGetCommand@2
  displayName: 'Restore NuGet packages for .NET Framework'
  inputs:
    command: 'restore'
    restoreSolution: $(solution)
    feedsToUse: config
    nugetConfigPath: NuGet.config

- task: DotNetCoreCLI@2
  displayName: 'Build solution'
  inputs:
    command: 'build'
    projects: '$(solution)'
    configuration: '$(buildConfiguration)'

虽然有效的是原始 MSBuild，它显式恢复包：

- task: MSBuild@1
  displayName: Build solution
  inputs:
    solution: $(solution)   
    msbuildArguments: /restore /t:build /p:CreatePackage=true /p:NoPackageAnalysis=true /p:PackageOutputPath=$(Build.ArtifactStagingDirectory)\artifacts
    configuration: $(BuildConfiguration)
    maximumCpuCount: true

Answer 1

我认为您的 dotnet 还原任务不是 dotnet 还原，而是某种 msbuild / NuGet 还原？

特别是，从日志的最后 20 行来看，我假设这个错误与这个包无关，只是这个包是它尝试恢复的第一个包，所以这是它出错的地方并且真正的问题更多是https://github.com/NuGet/Home/issues/4821 之类的变体。

诊断步骤 1：将构建代理容器更改为没有 Visual Studio 的容器，看看是否可以修复还原错误。

我确信 (1) 还原步骤对于 dotnet core 工具链是多余的，并且 (2) 您必须使用 dotnet core 工具链在您的开发桌面上构建？

所以我认为迁移到 Azure 的问题可能是，(1) 如何构建正确的管道并不明显，(2) dotnet core/msbuild/nuget 交互中可能存在一些错误。

• 如果您使用 GUI 选项，那么只有您想要的任务是 dotnet core 任务
• 如果您使用 YML 选项，那么首先选择 only 从https://docs.microsoft.com/en-us/azure/devops/pipelines/languages/dotnet-core 提取的 sn-ps。该页面上的 sn-ps 相当于在本地计算机上运行 dotnet 命令，因此可以在本地计算机上进行一些调试。

Answer 2

这是我最后的having working：

trigger:
- master

pool:
  vmImage: 'windows-2019'

variables:
  solution: 'JWT.sln'
  buildConfiguration: 'Release'
  buildPlatform: 'Any CPU'
  coreVersion: '2.2.106'
  nugetVersion: '4.9.4'

steps:
- task: DotNetCoreInstaller@0
  displayName: Install .NET Core v$(coreVersion)
  inputs:
      version: $(coreVersion)

- task: DotNetCoreCLI@2
  displayName: 'Restore NuGet packages for .NET Core'
  inputs:
    command: 'restore'
    projects: '**/*.csproj'

- task: NuGetToolInstaller@0
  displayName: Install NuGet v$(nugetVersion)
  inputs:
    versionSpec: $(nugetVersion)
    checkLatest: true

- task: NuGetCommand@2
  displayName: 'Restore NuGet packages for .NET Framework'
  inputs:
    command: 'restore'
    restoreSolution: $(solution)

- task: DotNetCoreCLI@2
  displayName: 'Build solution'
  inputs:
    command: 'build'
    projects: '$(solution)'
    arguments: '-c $(buildConfiguration)'

- task: DotNetCoreCLI@2
  displayName: Run .NET Core tests
  inputs:
    command: 'test'
    projects: 'tests/**/JWT.Tests.Core.csproj'
    arguments: ' -c $(buildConfiguration) --no-build --no-restore'
    testRunner: VSTest
    testResultsFiles: '**/*.trx'
    testResultsFormat: 'xUnit'
    failTaskOnFailedTests: true

- task: DotNetCoreCLI@2
  displayName: Run .NET Framework tests
  inputs:
    command: 'test'
    projects: 'tests/**/JWT.Tests.NetFramework.csproj'
    arguments: ' -c $(buildConfiguration) --no-build --no-restore'
    testRunner: VSTest
    testResultsFiles: '**/*.trx'
    testResultsFormat: 'xUnit'
    failTaskOnFailedTests: true

- task: DotNetCoreCLI@2
  displayName: Package NuGet package
  inputs:
    command: pack
    packagesToPack: 'src/**/*.csproj'
    configuration: $(BuildConfiguration)
    nobuild: true

- task: PublishBuildArtifacts@1
  displayName: Publish build artifacts