Blazor 作用域 CSS 未在 Azure Pipelines 上构建

我正在开发一个使用作用域 CSS 的 Blazor 应用程序，但是当我尝试使用 Azure Pipelines 构建它时，不会生成作用域 CSS 文件。我在一台可以通过 RDP 访问的本地计算机上构建，我看到wwwroot/{assemblyname}.styles.css文件完全丢失后dotnet publish

当我在同一台计算机上运行 Azure Pipelines 手动显示的确切命令时，它就存在并且工作得很好。

The azure-pipelines.yml task:

- task: UseDotNet@2
  inputs:
    packageType: 'sdk'
    version: '5.x'
...
- task: DotNetCoreCLI@2
  condition: succeeded()
  displayName: Publish my.project.blazor
  inputs:
    command: 'publish'
    publishWebProjects: false
    projects: 'src\my.project.blazor\my.project.blazor.csproj'
    arguments: '/p:Version=$(MainVersion).$(Patch) -o $(PublishFolder) -c Release -v d'
    zipAfterPublish: false
    modifyOutputPath: false

管道构建开始：

Starting: Publish my.project.blazor
==============================================================================
Task         : .NET Core
Description  : Build, test, package, or publish a dotnet application, or run a custom dotnet command
Version      : 2.187.0
Author       : Microsoft Corporation
Help         : https://learn.microsoft.com/azure/devops/pipelines/tasks/build/dotnet-core-cli
==============================================================================
C:\Windows\system32\chcp.com 65001
Active code page: 65001
Info: .NET Core SDK/runtime 2.2 and 3.0 are now End of Life(EOL) and have been removed from all hosted agents. If you're using these SDK/runtimes on hosted agents, kindly upgrade to newer versions which are not EOL, or else use UseDotNet task to install the required version.
C:\agent\_work\_tool\dotnet\dotnet.exe publish C:\agent\_work\31\s\src\my.project.blazor\my.project.blazor.csproj /p:Version=1.0.17 -o C:\agent\_work\31\Publish -c Release -v d
Microsoft (R) Build Engine version 16.10.1+2fd48ab73 for .NET
Copyright (C) Microsoft Corporation. All rights reserved.

Build started 6/18/2021 1:53:30 PM.
     0>Process = "C:\agent\_work\_tool\dotnet\dotnet.exe"
       MSBuild executable path = "C:\agent\_work\_tool\dotnet\sdk\5.0.301\MSBuild.dll"
       Command line arguments = "C:\agent\_work\_tool\dotnet\sdk\5.0.301\MSBuild.dll -maxcpucount -verbosity:m -restore -target:Publish -property:PublishDir=C:\agent\_work\31\Publish -property:Configuration=Release -verbosity:d C:\agent\_work\31\s\src\my.project.blazor\my.project.blazor.csproj /p:Version=1.0.17 -distributedlogger:Microsoft.DotNet.Tools.MSBuild.MSBuildLogger,C:\agent\_work\_tool\dotnet\sdk\5.0.301\dotnet.dll*Microsoft.DotNet.Tools.MSBuild.MSBuildForwardingLogger,C:\agent\_work\_tool\dotnet\sdk\5.0.301\dotnet.dll"
       Current directory = "C:\agent\_work\31\s"

如前所述，如果我在服务器上手动执行该命令，例如：

C:\agent\_work\_tool\dotnet\dotnet.exe publish C:\agent\_work\31\s\src\my.project.blazor\my.project.blazor.csproj /p:Version=1.0.17 -o C:\agent\_work\31\Publish -c Release -v d

它工作正常并且生成的、有范围的 .css 文件出现。

这是手动输入时命令输出的开始（注意相同的 MSBuild 版本）：

Microsoft (R) Build Engine version 16.10.1+2fd48ab73 for .NET
Copyright (C) Microsoft Corporation. All rights reserved.

Build started 6/18/2021 2:06:57 PM.
     0>Process = "C:\agent\_work\_tool\dotnet\dotnet.exe"
       MSBuild executable path = "C:\agent\_work\_tool\dotnet\sdk\5.0.301\MSBuild.dll"
       Command line arguments = "C:\agent\_work\_tool\dotnet\sdk\5.0.301\MSBuild.dll -maxcpucount -verbosity:m -restore -target:Publish -property:PublishDir=C:\agent\_work\31\Publish -property:Configuration=Release -verbosity:d C:\agent\_work\31\s\src\my.project.blazor\my.project.blazor.csproj /p:Version=1.0.17 -distributedlogger:Microsoft.DotNet.Tools.MSBuild.MSBuildLogger,C:\agent\_work\_tool\dotnet\sdk\5.0.301\dotnet.dll*Microsoft.DotNet.Tools.MSBuild.MSBuildForwardingLogger,C:\agent\_work\_tool\dotnet\sdk\5.0.301\dotnet.dll"
       Current directory = "C:\agent\_work\31\s"

我比较了这些日志文件的输出，发现了一些值得注意的事情，主要是：

管道:

1:7>Target "_GenerateScopedCssFiles" in file "C:\agent\_work\_tool\dotnet\sdk\5.0.301\Sdks\Microsoft.NET.Sdk.Razor\build\netstandard2.0\Microsoft.NET.Sdk.Razor.ScopedCss.targets" from project "C:\agent\_work\31\s\src\my.project.blazor\my.project.blazor.csproj" (target "_PrepareForScopedCss" depends on it):
       Skipping target "_GenerateScopedCssFiles" because it has no outputs.
       Though the target has declared its outputs, the output specification only references empty properties and/or empty item lists.
   1:7>Done building target "_GenerateScopedCssFiles" in project "my.project.blazor.csproj".
       Target "_PrepareForBundling" skipped. Previously built successfully.
       Target "ResolveStaticWebAssetsInputs" skipped. Previously built successfully.
       Target "_CollectAllScopedCssAssets" skipped. Previously built successfully.
   1:7>Target "BundleScopedCssFiles" in file "C:\agent\_work\_tool\dotnet\sdk\5.0.301\Sdks\Microsoft.NET.Sdk.Razor\build\netstandard2.0\Microsoft.NET.Sdk.Razor.ScopedCss.targets" from project "C:\agent\_work\31\s\src\my.project.blazor\my.project.blazor.csproj" (target "_PrepareForScopedCss" depends on it):
       Task "ConcatenateCssFiles" skipped, due to false condition; ('@(_ScopedCssProjectBundles)' != '' or '@(_ScopedCss)' != '') was evaluated as ('' != '' or '' != '').
       Task "ConcatenateCssFiles" skipped, due to false condition; ('@(_ScopedCss)' != '') was evaluated as ('' != '').

Manual:

   1:7>Target "_GenerateScopedCssFiles" in file "C:\agent\_work\_tool\dotnet\sdk\5.0.301\Sdks\Microsoft.NET.Sdk.Razor\build\netstandard2.0\Microsoft.NET.Sdk.Razor.ScopedCss.targets" from project "C:\agent\_work\31\s\src\my.project.blazor\my.project.blazor.csproj" (target "_PrepareForScopedCss" depends on it):
       Skipping target "_GenerateScopedCssFiles" because all output files are up-to-date with respect to the input files.
       Input files: 
           Components\Configurator.razor.css
           Components\Option.razor.css
           Components\Options.razor.css
           Components\Popup.razor.css
           Components\Step.razor.css
           Pages\Index.razor.css
       Output files: 
           C:\agent\_work\31\s\src\my.project.blazor\obj\Release\net5.0\scopedcss\Components\Configurator.razor.rz.scp.css
           C:\agent\_work\31\s\src\my.project.blazor\obj\Release\net5.0\scopedcss\Components\Option.razor.rz.scp.css
           C:\agent\_work\31\s\src\my.project.blazor\obj\Release\net5.0\scopedcss\Components\Options.razor.rz.scp.css
           C:\agent\_work\31\s\src\my.project.blazor\obj\Release\net5.0\scopedcss\Components\Popup.razor.rz.scp.css
           C:\agent\_work\31\s\src\my.project.blazor\obj\Release\net5.0\scopedcss\Components\Step.razor.rz.scp.css
           C:\agent\_work\31\s\src\my.project.blazor\obj\Release\net5.0\scopedcss\Pages\Index.razor.rz.scp.css
   1:7>Done building target "_GenerateScopedCssFiles" in project "my.project.blazor.csproj".
       Target "_PrepareForBundling" skipped. Previously built successfully.
       Target "ResolveStaticWebAssetsInputs" skipped. Previously built successfully.
       Target "_CollectAllScopedCssAssets" skipped. Previously built successfully.
   1:7>Target "BundleScopedCssFiles" in file "C:\agent\_work\_tool\dotnet\sdk\5.0.301\Sdks\Microsoft.NET.Sdk.Razor\build\netstandard2.0\Microsoft.NET.Sdk.Razor.ScopedCss.targets" from project "C:\agent\_work\31\s\src\my.project.blazor\my.project.blazor.csproj" (target "_PrepareForScopedCss" depends on it):
       Using "ConcatenateCssFiles" task from assembly "C:\agent\_work\_tool\dotnet\sdk\5.0.301\Sdks\Microsoft.NET.Sdk.Razor\build\netstandard2.0\..\..\tasks\net5.0\Microsoft.NET.Sdk.Razor.Tasks.dll".
       Task "ConcatenateCssFiles"
       Done executing task "ConcatenateCssFiles".
       Task "ConcatenateCssFiles"
       Done executing task "ConcatenateCssFiles".

我不明白为什么 Azure Pipelines 触发器构建说Skipping target "_GenerateScopedCssFiles" because it has no outputs.，但我认为这可能是我的问题的原因。

如何让 Pipelines 确定范围并捆绑我的 .css 文件？

我有类似的问题。尽管公平地说，我也使用了网络编译器，这增加了一些复杂性。

我让它工作的唯一方法是在发布命令之前执行 .net build 命令。

值得一试

编辑：很高兴它也对你有用。和你一样，我不知道为什么这会起作用，在对一个低价值项目的构建过程进行了太长时间的混乱之后……一旦它起作用了，我就没有研究为什么。