Unable to publish project on Linux on 2.1 Preview 2

[karelz]

From @danwalmsley on April 25, 2018 15:57

Hi, my project built and published no problem on 2.0 and 2.1 Preview 1

but now I get:

/home/dan/repos/AvalonStudio/AvalonStudio/AvalonStudio.Languages.Xaml/AvalonStudio.Languages.Xaml.csproj : error NU1605: Detected package downgrade: Microsoft.NETCore.App from 2.0.6 to 2.0.0. Reference the package directly from the project to select a different version.  [/home/dan/repos/AvalonStudio/AvalonStudio/AvalonStudio/AvalonStudio.csproj]
/home/dan/repos/AvalonStudio/AvalonStudio/AvalonStudio.Languages.Xaml/AvalonStudio.Languages.Xaml.csproj : error NU1605:  AvalonStudio.Languages.Xaml -> Avalonia.Designer.HostApp -> Microsoft.NETCore.App (>= 2.0.6)  [/home/dan/repos/AvalonStudio/AvalonStudio/AvalonStudio/AvalonStudio.csproj]
/home/dan/repos/AvalonStudio/AvalonStudio/AvalonStudio.Languages.Xaml/AvalonStudio.Languages.Xaml.csproj : error NU1605:  AvalonStudio.Languages.Xaml -> Microsoft.NETCore.App (>= 2.0.0) [/home/dan/repos/AvalonStudio/AvalonStudio/AvalonStudio/AvalonStudio.csproj]

AvalonStudio.csproj is a netcoreapp2.0 project.
AvalonStudio.Languages.Xaml.csprojis a netcoreapp2.0 project
Avalonia.Designer.HostApp is also a netcoreapp2.0 project.

The previous version was happy with this.

The repository containing the code at specific commit to repro is here:
VitalElement/AvalonStudio@e947164

git clone --recursive
cd AvalonStudio\AvalonStudio\AvalonStudio
dotnet publish -c Release -f netcoreapp2.0 -r debian.8-x64

Let me know if I can provide any further information.

Thanks in advance.

Copied from original issue: dotnet/coreclr#17774

[karelz]

From @RussKeldorph on April 25, 2018 19:18

@danmosemsft @karelz

[karelz]

From @danmosemsft on April 27, 2018 20:37

@steveharter any idea where this should go?

[karelz]

Aren't these NuGet errors?
@danwalmsley did you retarget your project to 2.1 Preview2? Does it fail only during publish, or also during build?
Are you able to minimize the repro to standalone projects referencing the suspicious NuGet packages?

[karelz]

From @danwalmsley on April 29, 2018 19:39

@karelz dotnet build works on its own.

I left the project files as they were .netcoreapp2.0.

I will have a go at minimizing the repro.

[karelz]

From @danwalmsley on April 30, 2018 15:53

@karelz the references are Project references not Nuget packages.

Im trying to get you a minimal repro asap.

[karelz]

From @RussKeldorph on May 1, 2018 17:20

@karelz Do we know enough to say where this bug should be tracked? Do we know if it might require a 2.1 fix?

[karelz]

From @danwalmsley on May 2, 2018 17:0

Repro.zip
Ok sorry for the delay here is a repro of the issue.

Extract the zip file.

Install dotnet 2.1 preview 2

cd into AvalonStudio.Languages.Xaml directory.

run dotnet publish -f netcoreapp2.0 -r win7-x64

you will get the error,

uninstall the preview and go back to version 2 sdk.

run the publish command again, it will work.

[danwalmsley]

Also id like to state that this is not Linux specific, I can also repro this on Widows too.

[danwalmsley]

The output on v2.0 sdk:

PS C:\Users\dan\dev\repos\AvalonStudio\AvalonStudio\AvalonStudio.Languages.Xaml> dotnet publish -f netcoreapp2.0 -r win7
-x64
Microsoft (R) Build Engine version 15.6.84.34536 for .NET Core
Copyright (C) Microsoft Corporation. All rights reserved.

  Restoring packages for C:\Users\dan\dev\repos\AvalonStudio\AvalonStudio\Avalonia.Ide\src\Avalonia.Ide.CompletionEngine\Avalonia.Ide.CompletionEngine.csproj...
  Restoring packages for C:\Users\dan\dev\repos\AvalonStudio\AvalonStudio\Avalonia.Ide\src\Avalonia.Ide.CompletionEngine.SrmMetadataProvider\Avalonia.Ide.CompletionEngine.SrmMetadataProvider.csproj...
  Restoring packages for C:\Users\dan\dev\repos\AvalonStudio\AvalonStudio\Avalonia.Designer.HostApp\Avalonia.Designer.HostApp.csproj...
  Restore completed in 711.06 ms for C:\Users\dan\dev\repos\AvalonStudio\AvalonStudio\Avalonia.Ide\src\Avalonia.Ide.CompletionEngine\Avalonia.Ide.CompletionEngine.csproj.
  Restore completed in 711.05 ms for C:\Users\dan\dev\repos\AvalonStudio\AvalonStudio\Avalonia.Ide\src\Avalonia.Ide.CompletionEngine.SrmMetadataProvider\Avalonia.Ide.CompletionEngine.SrmMetadataProvider.csproj.
  Restoring packages for C:\Users\dan\dev\repos\AvalonStudio\AvalonStudio\AvalonStudio.Languages.Xaml\AvalonStudio.Languages.Xaml.csproj...
  Restore completed in 780.01 ms for C:\Users\dan\dev\repos\AvalonStudio\AvalonStudio\Avalonia.Designer.HostApp\Avalonia.Designer.HostApp.csproj.
  Restore completed in 408.26 ms for C:\Users\dan\dev\repos\AvalonStudio\AvalonStudio\AvalonStudio.Languages.Xaml\AvalonStudio.Languages.Xaml.csproj.
  Avalonia.Designer.HostApp -> C:\Users\dan\dev\repos\AvalonStudio\AvalonStudio\Avalonia.Designer.HostApp\bin\Debug\netcoreapp2.0\Avalonia.Designer.HostApp.dll
  Avalonia.Ide.CompletionEngine -> C:\Users\dan\dev\repos\AvalonStudio\AvalonStudio\Avalonia.Ide\src\Avalonia.Ide.CompletionEngine\bin\Debug\netstandard1.4\Avalonia.Ide.CompletionEngine.dll
  Avalonia.Ide.CompletionEngine.SrmMetadataProvider -> C:\Users\dan\dev\repos\AvalonStudio\AvalonStudio\Avalonia.Ide\src\Avalonia.Ide.CompletionEngine.SrmMetadataProvider\bin\Debug\netstandard1.4\Avalonia.Ide.CompletionEngine.SrmMetadataProvider.dll
  AvalonStudio.Languages.Xaml -> C:\Users\dan\dev\repos\AvalonStudio\AvalonStudio\AvalonStudio.Languages.Xaml\bin\Debug\netcoreapp2.0\win7-x64\AvalonStudio.Languages.Xaml.dll
  AvalonStudio.Languages.Xaml -> C:\Users\dan\dev\repos\AvalonStudio\AvalonStudio\AvalonStudio.Languages.Xaml\bin\Debug\netcoreapp2.0\win7-x64\publish\

the output on 2.1 preview 2

PS C:\Users\dan\dev\repos\AvalonStudio\AvalonStudio\AvalonStudio.Languages.Xaml> dotnet publish -f netcoreapp2.0 -r win7
-x64
Microsoft (R) Build Engine version 15.7.145.53551 for .NET Core
Copyright (C) Microsoft Corporation. All rights reserved.

  Restoring packages for C:\Users\dan\dev\repos\AvalonStudio\AvalonStudio\Avalonia.Designer.HostApp\Avalonia.Designer.HostApp.csproj...
  Restoring packages for C:\Users\dan\dev\repos\AvalonStudio\AvalonStudio\Avalonia.Ide\src\Avalonia.Ide.CompletionEngine\Avalonia.Ide.CompletionEngine.csproj...
  Restoring packages for C:\Users\dan\dev\repos\AvalonStudio\AvalonStudio\Avalonia.Ide\src\Avalonia.Ide.CompletionEngine.SrmMetadataProvider\Avalonia.Ide.CompletionEngine.SrmMetadataProvider.csproj...
  Restore completed in 542.31 ms for C:\Users\dan\dev\repos\AvalonStudio\AvalonStudio\Avalonia.Ide\src\Avalonia.Ide.CompletionEngine\Avalonia.Ide.CompletionEngine.csproj.
  Restore completed in 542.32 ms for C:\Users\dan\dev\repos\AvalonStudio\AvalonStudio\Avalonia.Ide\src\Avalonia.Ide.CompletionEngine.SrmMetadataProvider\Avalonia.Ide.CompletionEngine.SrmMetadataProvider.csproj.
  Restoring packages for C:\Users\dan\dev\repos\AvalonStudio\AvalonStudio\AvalonStudio.Languages.Xaml\AvalonStudio.Languages.Xaml.csproj...
  Generating MSBuild file C:\Users\dan\dev\repos\AvalonStudio\AvalonStudio\Avalonia.Designer.HostApp\obj\Avalonia.Designer.HostApp.csproj.nuget.g.props.
  Generating MSBuild file C:\Users\dan\dev\repos\AvalonStudio\AvalonStudio\Avalonia.Designer.HostApp\obj\Avalonia.Designer.HostApp.csproj.nuget.g.targets.
  Restore completed in 734.86 ms for C:\Users\dan\dev\repos\AvalonStudio\AvalonStudio\Avalonia.Designer.HostApp\Avalonia.Designer.HostApp.csproj.
C:\Users\dan\dev\repos\AvalonStudio\AvalonStudio\AvalonStudio.Languages.Xaml\AvalonStudio.Languages.Xaml.csproj : error NU1605: Detected package downgrade: Microsoft.NETCore.App from 2.0.6 to 2.0.0. Reference the package directly from the project to select a different version.
C:\Users\dan\dev\repos\AvalonStudio\AvalonStudio\AvalonStudio.Languages.Xaml\AvalonStudio.Languages.Xaml.csproj : error NU1605:  AvalonStudio.Languages.Xaml -> Avalonia.Designer.HostApp -> Microsoft.NETCore.App (>= 2.0.6)
C:\Users\dan\dev\repos\AvalonStudio\AvalonStudio\AvalonStudio.Languages.Xaml\AvalonStudio.Languages.Xaml.csproj : error NU1605:  AvalonStudio.Languages.Xaml -> Microsoft.NETCore.App (>= 2.0.0)
  Restore failed in 381.15 ms for C:\Users\dan\dev\repos\AvalonStudio\AvalonStudio\AvalonStudio.Languages.Xaml\AvalonStudio.Languages.Xaml.csproj.
PS C:\Users\dan\dev\repos\AvalonStudio\AvalonStudio\AvalonStudio.Languages.Xaml>

[livarcocc]

cc @dsplaisted

[dsplaisted]

@danwalmsley This was broken by #2085. As a workaround, you should be able to put the following in a PropertyGroup in AvalonStudio.Languages.Xaml.csproj:

<TargetLatestRuntimePatch Condition="'$(RuntimeIdentifier)' != ''">true</TargetLatestRuntimePatch>

The bug is that if a .NET Core project with an OutputType of Library references one with an OutputType of Exe, you will get a failure if you try to do a self-contained publish. This is because the Exe will roll-forward to the latest patch of .NET Core, but the app won't, leading to NuGet complaining about a package downgrade.

Can you help me understand why Avalonia is doing a self-contained publish of a library? That's not the only way you could run into this issue (in general restoring, building, or publishing a project with a RID specified and where there is a library referencing an Exe would hit it), but I don't think doing a self-contained publish on a library is something we designed for, so you might run into other issues.