MSBuild 在分隔字符串上透视 ItemGroup

Question

我有一个安装程序的 ItemGroup，每个安装程序都包含一个属性，它是输出文件夹的名称（分隔），如下所示：

<ItemGroup>
  <Installers Include="Installer1.msi">
    <Folders>Folder1,Folder4</Folders>
  </Installers>

  <Installers Include="Installer2.msi">
    <Folders>Folder1,Folder2,Folder3,Folder4</Folders>
  </Installers>
</ItemGroup>

我希望能够将每个安装程序复制到指定的每个文件夹中。我一直在试图找出一种向安装程序添加额外元数据的方法，但似乎无法获得这样的最终列表：

1. Installer1.msi:Folder1
2. Installer1.msi:Folder4
3. Installer2.msi:Folder1
4. Installer2.msi:Folder2
5. Installer2.msi:Folder3
6. Installer2.msi:Folder4

所以我可以执行如下操作：

<Copy SourceFiles="@(Installers)" DestinationFolder="%(Installers.Folder)" />

我知道我可以将我的 ItemGroup 修改为：

<ItemGroup>
  <Installers Include="Installer1.msi">
    <Folder>Folder1</Folder>
  </Installers>
  <Installers Include="Installer1.msi">
    <Folder>Folder4</Folder>
  </Installers>

  <Installers Include="Installer2.msi">
    <Folder>Folder1</Folder>
  </Installers>
  <Installers Include="Installer2.msi">
    <Folder>Folder2</Folder>
  </Installers>
  <Installers Include="Installer2.msi">
    <Folder>Folder3</Folder>
  </Installers>
  <Installers Include="Installer2.msi">
    <Folder>Folder4</Folder>
  </Installers>
</ItemGroup>

但我宁愿不这样做，因为这就是我们现在所拥有的，人们总是会错过一些东西（因为它太冗长了）。

Answer 1

用分号分隔文件夹名称，然后反转安装程序和文件夹值：

<Project ToolsVersion="4.0" DefaultTargets="Inversionator" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
    <ItemGroup>
        <Folders Include="Folder1;Folder4">
            <Installer>Installer1.msi</Installer>
        </Folders>
        <Folders Include="Folder1;Folder2;Folder3;Folder4">
            <Installer>Installer2.msi</Installer>
        </Folders>
    </ItemGroup>

    <Target Name="Inversionator">
        <Message Text="%(Folders.Installer) %(Folders.Identity) " Importance="high" />
    </Target>
</Project>

任务的输出现在是：

Installer1.msi Folder1
Installer1.msi Folder4
Installer2.msi Folder1
Installer2.msi Folder2
Installer2.msi Folder3
Installer2.msi Folder4