MSBuildProjectExtensionsPath not handled correctly in GenerateTemporaryTargetAssembly

[zivkan]

• .NET Core Version: 6.0.100
• Windows version: n/a
• Does the bug reproduce also in WPF for .NET Framework 4.8?: No
• Is this bug related specifically to tooling in Visual Studio (e.g. XAML Designer, Code editing, etc...)? No

Problem description: A customer reported this issue to NuGet: NuGet/Home#4463 (comment)

I'm reporting it here, but @mkonijnenburg is the affected customer

Actual behavior:

C:\Program Files\dotnet\sdk\6.0.100\Sdks\Microsoft.NET.Sdk\targets\Microsoft.PackageDependencyResolution.targets(267,5): error NETSDK1004: Assets file 'C:\src\test\wpfArtifacts\obj\MyApp_3j03kfnj_wpftmp\project.assets.json' not found. Run a NuGet package restore to generate this file. [C:\src\test\wpfArtifacts\src\MyApp\MyApp_3j03kfnj_wpftmp.csproj]

Expected behavior:

Build successfully

Minimal repro:

Create Directory.Build.props:

<Project>
    <PropertyGroup>
        <BaseOutputPath>$(MSBuildThisFileDirectory)bin\$(MSBuildProjectName)\</BaseOutputPath>
        <MSBuildProjectExtensionsPath>$(MSBuildThisFileDirectory)obj\$(MSBuildProjectName)\</MSBuildProjectExtensionsPath>
        <IntermediateOutputPath>$(MSBuildThisFileDirectory)obj\$(MSBuildProjectName)\$(Configuration)\</IntermediateOutputPath>
    </PropertyGroup>
</Project>

then dotnet new wpf -n MyApp ; dotnet new sln ; dotnet sln add MyApp ; dotnet build

If I use global.json to pin the .NET SDK to 5.0.x, then this problem does not reproduce.

[mkonijnenburg]

A quick non-generic workaround

<Project> <Choose> <When Condition="$([System.Text.RegularExpressions.Regex]::IsMatch($(MSBuildProjectName), '^ProjectA.*_[0-9a-z]{8}_wpftmp$'))"> <PropertyGroup> <BaseOutputPath>bin\ProjectA\</BaseOutputPath> <MSBuildProjectExtensionsPath>obj\ProjectA\</MSBuildProjectExtensionsPath> <IntermediateOutputPath>obj\ProjectA\$(Configuration)\</IntermediateOutputPath> </PropertyGroup> </When> <When Condition="! $([System.Text.RegularExpressions.Regex]::IsMatch($(MSBuildProjectName), '^.*_[0-9a-z]{8}_wpftmp$'))"> <PropertyGroup> <BaseOutputPath>bin\$(MSBuildProjectName)\</BaseOutputPath> <MSBuildProjectExtensionsPath>obj\$(MSBuildProjectName)\</MSBuildProjectExtensionsPath> <IntermediateOutputPath>obj\$(MSBuildProjectName)\$(Configuration)\</IntermediateOutputPath> </PropertyGroup> </When> </Choose> </Project>

[pchaurasia14]

With the steps to reproduce mentioned above, it looks like things are working fine with the new SDK releases.

Please let us know if that is not the case.