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

Question

我正在尝试 to migrate my small OSS project from AppVeyor to Azure DevOps and got almost everything done but now getting this error dotnet restore 步骤：

NU1100: Unable to resolve 'System.Reflection.TypeExtensions (>= 4.5.1)' for '.NETStandard,Version=v1.3'.

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)'

但有效的是显式恢复包的原始 MSBuild：

- 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 恢复任务不是 dotnet 恢复，而是 msbuild / NuGet 恢复？

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，所以这是它所在的位置出错了，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，看看是否修复了还原错误。

我确信 (1) 恢复步骤对于 dotnet 核心工具链是多余的，并且 (2) 您必须使用 dotnet 核心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，以及 (2) dotnet core/msbuild/nuget 交互中可能存在一些错误。

如果您使用 GUI 选项，那么您想要的只有个任务是 dotnet core 个任务
如果您使用 YML 选项，则首先选择仅从 https://docs.microsoft.com/en-us/azure/devops/pipelines/languages/dotnet-core 中提取的片段。该页面上的代码片段等同于运行本地计算机上的 dotnet 命令，因此可以在本地计算机上进行一些调试。

Answer 2

这是我的结局 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

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

NU1100: Unable to resolve 'System.Reflection.TypeExtensions (>= 4.5.1)' for '.NETStandard,Version=v1.3'

nuget

.net-core

azure-devops

asp.net-core-cli

.net-standard