dotnet publish results in an error about duplicate files

[mattleibow]

Describe the bug

Based on this issue: dotnet/maui#9879

Passing a -r win10-x64 to a app .csproj tries to load both a "neutral" and a "RID-specific" dll/pdb into the app:

dotnet publish MyApp.csproj -c Release -f net6.0-windows10.0.19041.0 -r win10-x64

Steps to reproduce the bug

1. Clone https://github.com/mattleibow/Maui-Issue-9879
2. Execute the publish command:

   dotnet publish -r win10-x64 -f net6.0-windows10.0.19041.0 /bl .\WinUIApp\WinUIApp.csproj
   

3. Observe error:
   Failure: msbuild.binlog.zip

   error APPX1101: Payload contains two or more files with the same destination path 'MauiClassLibrary.pdb'. Source files:
   error APPX1101: ...\MauiClassLibrary\bin\Release\net6.0-windows10.0.19041.0\MauiClassLibrary.pdb 
   error APPX1101: ...\MauiClassLibrary\bin\Release\net6.0-windows10.0.19041.0\win10-x64\MauiClassLibrary.pdb 
   

4. Run build again with custom RuntimeIdentifierOverride property set:

    dotnet publish  .\WinUIApp\WinUIApp.csproj -c Release -f net6.0-windows10.0.19041.0 /p:RuntimeIdentifierOverride=win10-x86
   

5. Observe success
   Success: msbuild.binlog.zip

Expected behavior

Passing the RID should only apply the the app project, and the class library references should just be non-RID.

Screenshots

No response

NuGet package version

1.1.4

Packaging type

Packaged (MSIX)

Windows version

Windows 11 version 21H2 (22000)

IDE

Other

Additional context

I was able to make a workaround:

Add this to the bottom of the app .csproj:

<PropertyGroup Condition="'$(RuntimeIdentifierOverride)' != ''">
	<RuntimeIdentifier>$(RuntimeIdentifierOverride)</RuntimeIdentifier>
</PropertyGroup>

Then when executing, use the new property instead of the RID:

dotnet publish  .\WinUIApp\WinUIApp.csproj -c Release -f net6.0-windows10.0.19041.0 /p:RuntimeIdentifierOverride=win10-x86

[mattleibow]

I can also reproduce this without a "maui" class library. In my attached repo, replace the contents of the plain ClassLibrary.csproj with:

msbuild.binlog.zip

<Project Sdk="Microsoft.NET.Sdk">

  <PropertyGroup>
    <TargetFrameworks>net6.0</TargetFrameworks>
    <TargetFrameworks Condition="$([MSBuild]::IsOSPlatform('windows'))">$(TargetFrameworks);net6.0-windows10.0.19041.0</TargetFrameworks>
    <ImplicitUsings>enable</ImplicitUsings>
    <EnableMsixTooling>true</EnableMsixTooling>
    <Nullable>enable</Nullable>
  </PropertyGroup>

  <ItemGroup  Condition="$([MSBuild]::GetTargetPlatformIdentifier('$(TargetFramework)')) == 'windows'">
    <PackageReference Include="Microsoft.WindowsAppSDK" Version="1.1.4" />
  </ItemGroup>

</Project>

[mattleibow]

I have updated the repository to leave MAUI out and just be a plain WinUI app.

[mattleibow]

This issue was moved to microsoft/WindowsAppSDK#3337