How to reference an item in an ItemGroup based on the Label attribute?

Question

In my cpp project file I have an item group defined as such:

<ItemGroup>
<None Include="file1.dll" Label="Release Version"/>
<None Include="file2.dll" Label="Debug Version"/>
</ItemGroup>

I have an AfterBuild target whereby I want to copy the above files into different locations based on the label attribute of the item. For example:

<Target Name="AfterBuild">
<Copy SourceFiles="@(None)" DestinationFiles="$(ReleaseLocation)" Condition="'%(None.Label)'=='Release Version'" ContinueOnError="false" />
</Target>

However this doesn't work (nothing is copied). How do I reference the Label attribute in my Copy command?

Answer 1

You cannot filter items based on Label attribute, but you can filter based on item's metadata. E.g.:

<ItemGroup>
  <None Include="file1.dll">
   <Label>Release Version</Label>
  </None>
  <None Include="file2.dll">
    <Label>Debug Version</Label>
  </None>
</ItemGroup>

<Target Name="AfterBuild">
  <ItemGroup>
    <_RetailContent Include="@(None)" Condition="%(Label) == 'Release Version'" />
  </ItemGroup>
  <Copy SourceFiles="@(_RetailContent)" DestinationFolder="$(ReleaseLocation)" ContinueOnError="false" />
</Target>