构建 .NET 5.0 项目 Azure DevOps 管道

Question

我正在尝试使用 Azure DevOps 管道构建在 .NET 5.0 中构建项目，但收到此错误

2020-11-14T01:59:45.8238544Z [command]"C:\Program Files\dotnet\dotnet.exe" build D:\a\1\s\XXX.csproj "-dl:CentralLogger,\"D:\a\_tasks\DotNetCoreCLI_5541a522-603c-47ad-91fc-a4b1d163081b\2.178.0\dotnet-build-helpers\Microsoft.TeamFoundation.DistributedTask.MSBuild.Logger.dll\"*ForwardingLogger,\"D:\a\_tasks\DotNetCoreCLI_5541a522-603c-47ad-91fc-a4b1d163081b\2.178.0\dotnet-build-helpers\Microsoft.TeamFoundation.DistributedTask.MSBuild.Logger.dll\""
2020-11-14T01:59:46.1472016Z Microsoft (R) Build Engine version 16.7.0+7fb82e5b2 for .NET
2020-11-14T01:59:46.1473316Z Copyright (C) Microsoft Corporation. All rights reserved.
2020-11-14T01:59:46.1473902Z 
2020-11-14T01:59:46.6006398Z   Determining projects to restore...
2020-11-14T01:59:47.2059773Z   Restored D:\a\1\s\XXX.csproj (in 234 ms).
2020-11-14T01:59:47.2119638Z   1 of 2 projects are up-to-date for restore.

    2020-11-14T01:59:47.3209350Z ##[error]C:\Program Files\dotnet\sdk\3.1.403\Microsoft.Common.CurrentVersion.targets(1177,5): Error MSB3644: The reference assemblies for .NETFramework,Version=v5.0 were not found. To resolve this, install the Developer Pack (SDK/Targeting Pack) for this framework version or retarget your application. You can download .NET Framework Developer Packs at https://aka.ms/msbuild/developerpacks

2020-11-14T01:59:47.3261839Z C:\Program Files\dotnet\sdk\3.1.403\Microsoft.Common.CurrentVersion.targets(1177,5): error MSB3644: The reference assemblies for .NETFramework,Version=v5.0 were not found. To resolve this, install the Developer Pack (SDK/Targeting Pack) for this framework version or retarget your application. You can download .NET Framework Developer Packs at https://aka.ms/msbuild/developerpacks [D:\a\1\s\XXX.csproj]
2020-11-14T01:59:47.3270768Z 
2020-11-14T01:59:47.3274231Z Build FAILED.
2020-11-14T01:59:47.3275925Z 
2020-11-14T01:59:47.3277393Z C:\Program Files\dotnet\sdk\3.1.403\Microsoft.Common.CurrentVersion.targets(1177,5): error MSB3644: The reference assemblies for .NETFramework,Version=v5.0 were not found. To resolve this, install the Developer Pack (SDK/Targeting Pack) for this framework version or retarget your application. You can download .NET Framework Developer Packs at https://aka.ms/msbuild/developerpacks [D:\a\1\s\XXX.csproj]
2020-11-14T01:59:47.3279484Z     0 Warning(s)
2020-11-14T01:59:47.3279860Z     1 Error(s)
2020-11-14T01:59:47.3280170Z 
2020-11-14T01:59:47.3280537Z Time Elapsed 00:00:01.09
2020-11-14T01:59:47.3624731Z ##[error]Error: The process 'C:\Program Files\dotnet\dotnet.exe' failed with exit code 1

有人知道 Azure DevOps 管道是否支持构建 .NET 5.0 代码？

Answer 1

是的，Azure DevOps Pipelines 可以构建 net5.0 应用程序。

如果您使用“.Net Core”（yaml 中的DotNetCoreCLI）任务进行构建 - 添加“Use .NET Core”（yaml 中的UseDotNet）之前的任务，版本正确：

- task: UseDotNet@2
  inputs:
    packageType: 'sdk'
    version: '5.0.x'

- task: DotNetCoreCLI@2
  displayName: 'dotnet build'
  inputs:
    command: 'build'

Answer 2

支持。

由于您使用的是 .Net 5，而不是使用 Nuget 还原，请尝试将 Use .net core task 和 Dotnet core task 与还原命令一起使用。

- task: UseDotNet@2
  displayName: 'Use .NET Core sdk 5.0.100'
  inputs:
    packageType: 'sdk'
    version: '5.0.100'
    includePreviewVersions: true

- task: DotNetCoreCLI@2
  displayName: 'dotnet restore'
  inputs:
    command: restore
    projects: '**/*.csproj'

强烈建议对以.net core 为目标的项目使用dotnet restore 和dotnet build 任务。见this statement from Nuget task：

也可以在这里查看类似的问题：Azure CI pipeline for Blazor .NET 5 doesn't work

Answer 3

我需要同时使用两个框架版本来在 .net 5 中构建我的功能

步骤：

- task: UseDotNet@2
  inputs:
    version: '5.0.x'
    packageType: sdk
    includePreviewVersions: false

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