Directory.Build.targets 中的 AssemblyName 属性无效

Question

我正在尝试覆盖 Azure Pipeline 中 .NET 项目中定义的 AssemblyName 属性。 （目的是标准化 NuGet 包的程序集名称。）

当我在使用 MSBuild 构建之前创建 Directory.Build.props 文件时，它会起作用。

问题是，只有在 .csproj 文件中未定义 AssemblyName 时，这才有效。否则 .csproj 属性优先。

根据文档，我应该能够使用 Directory.Build.targets 来覆盖 .csproj 属性： https://learn.microsoft.com/en-us/visualstudio/msbuild/customize-your-build?view=vs-2022#choose- Between-adding-properties-to-a-props-or-targets -文件

如果您需要覆盖属性，请在 .targets 文件中执行此操作，然后 所有用户项目自定义都有机会生效。

这就是 Directory.Build.targets 文件包含的内容：

<Project>                   
    <Target Name="IncludeProjectMatchMessage" Condition="$(MSBuildProjectName) == ''${{ parameters.projectName }}''" BeforeTargets="Build">
         <Message Text="The custom Directory.Build.targets properties will be applied to this project $(MSBuildProjectName), AssemblyName = $(packageName)" Importance="high" />
    </Target>
    <PropertyGroup Condition="$(MSBuildProjectName) == ''${{ parameters.projectName }}''">
                     <GenerateDocumentationFile>true</GenerateDocumentationFile>
                      <Company>MyCompany</Company>
                      <AssemblyName>$(packageName)</AssemblyName>
    </PropertyGroup>
 </Project>

我也尝试过此操作，结果相同：

<Project>                   
 <Target Name="IncludeProjectMatchMessage" Condition="$(MSBuildProjectName) == ''${{ parameters.projectName }}''" BeforeTargets="Build">
         <Message Text="The custom Directory.Build.targets properties will be applied to this project $(MSBuildProjectName), AssemblyName = $(packageName)" Importance="high" />        
      <PropertyGroup Condition="$(MSBuildProjectName) == ''${{ parameters.projectName }}''">
                     <GenerateDocumentationFile>true</GenerateDocumentationFile>
                      <Company>MyCompany</Company>
                      <AssemblyName>$(packageName)</AssemblyName>
      </PropertyGroup>
  </Target>
 </Project>

MSBuild 期间显示文本消息，但未应用属性。

为什么会这样，我该如何解决？

Answer 1

我无法让 .targets 工作，也找不到任何有关可以使用此方法覆盖的属性的文档。

相反，我添加了一个直接修改 .csproj 文件的 PS 脚本：

- task: PowerShell@2
  displayName: Modify .csproj file
  inputs:
    targetType: 'inline'
    script: |
      # This script will overwrite csproj properties that are already defined.
      # If they are not defined, no changes are made - values are not added.
      # The case of missing properties is handled by adding a .props file in the next step.
      # Note that changing the assembly name may break the build when the library contains xaml files.
      # Read more below.

      $path = "$(projectFolder)\${{ parameters.projectName }}.csproj"
      Write-Host "Reading project file: " $path

      [xml]$xml =(gc $path)

      $projectAssemblyName = $xml.Project.PropertyGroup.AssemblyName

      Write-Host "AssemblyName: " $projectAssemblyName

      if ($projectAssemblyName -like "$(packageName)")
      {
         Write-Host "AssemblyName corresponds to package name."            
      }
      else 
      {
         Write-Host $projectAssemblyName "is different from package name:" $(packageName)

         Write-Host "Overwriting AssemblyName with " $(packageName)
         $xml.Project.PropertyGroup |? AssemblyName |% {$_.AssemblyName="$(packageName)"}            
      }

      $xml.Project.PropertyGroup |? Company |% {$_.Company="MyCompany"}    
      $xml.Project.PropertyGroup |? GenerateDocumentationFile |% {$_.GenerateDocumentationFile="True"}    

      $xml.Save($path)

      $fileContent = Get-Content $path          
      
      Write-Host "Success. File contents: " $fileContent