Nuget package downgrade on .NET 6 Docker build using Central Package Management

Question

TL;DR:

When I build my .NET 6 ASP.NET console app locally, the restore uses the versions of my dependencies that I specify, but when I build within the official .NET 6 docker image, it downgrades the packages to old and incompatible versions suitable for old versions of the .NET Framework. Please help!

I have a .NET 6 ASP.NET WebAPI app that runs as a self hosted console application in a docker container. It works as expected when built and run locally, but when I attempt to build it using the official microsoft .NET 6 image, it downgrades several of my packages to an old incompatible version. I'm using Central Package Management.

Here's the dockerfile - pretty vanilla:

  #See https://aka.ms/containerfastmode to understand how Visual Studio uses this Dockerfile to build your images for faster debugging.
  
  FROM mcr.microsoft.com/dotnet/aspnet:6.0 AS base
  WORKDIR /app
  EXPOSE 80
  EXPOSE 5000
  
  FROM mcr.microsoft.com/dotnet/sdk:6.0 AS build
  WORKDIR /src
  COPY ["src/simul8.runtime.host/simul8.runtime.host.csproj", "src/simul8.runtime.host/"]
  COPY ["src/simul8.core/simul8.core.csproj", "src/simul8.core/"]
  COPY ["src/simul8.metamodel/simul8.metamodel.csproj", "src/simul8.metamodel/"]
  COPY ["src/simul8.metamodel.metadata/simul8.metamodel.metadata.csproj", "src/simul8.metamodel.metadata/"]
  COPY ["src/simul8.runtime/simul8.runtime.csproj", "src/simul8.runtime/"]
  RUN dotnet restore "src/simul8.runtime.host/simul8.runtime.host.csproj"
  COPY . .
  WORKDIR "/src/src/simul8.runtime.host"
  RUN dotnet build "simul8.runtime.host.csproj" -c Release -o /app/build
  
  FROM build AS publish
  RUN dotnet publish "simul8.runtime.host.csproj" -c Release -o /app/publish /p:UseAppHost=false
  
  FROM base AS final
  WORKDIR /app
  COPY --from=publish /app/publish .
  ENTRYPOINT ["dotnet", "simul8.runtime.host.dll"]

The csproj file for the project simul8.metamodel, which is one of the failure points:

  <Project Sdk="Microsoft.NET.Sdk">
    <PropertyGroup>
      <TargetFramework>net6.0</TargetFramework>
      <ImplicitUsings>enable</ImplicitUsings>
      <Nullable>enable</Nullable>
      <RootNamespace>Simul8.Metamodel</RootNamespace>
    </PropertyGroup>
  
    <ItemGroup>
      <PackageReference Include="Antlr4.Runtime.Standard" />
    </ItemGroup>
  
    <ItemGroup>
      <None Remove="AST\ast.nodes.tt" />
    </ItemGroup>
  
    <ItemGroup>
      <Content Include="AST\ast.nodes.tt" />
    </ItemGroup>
  </Project>

It's the Antlr4.Runtime.Standard package that is being downgraded. In the central package version file, I ask for 4.10.1:

  <Project>
    <PropertyGroup>
      <ManagePackageVersionsCentrally>true</ManagePackageVersionsCentrally>
      <CentralPackageTransitivePinningEnabled>true</CentralPackageTransitivePinningEnabled>
    </PropertyGroup>
    <ItemGroup>
      <PackageVersion Include="Antlr4.Runtime.Standard" Version="4.10.1" />
      <PackageVersion Include="AutoFixture">
        <Version>4.17.0</Version>
      </PackageVersion>
      <PackageVersion Include="AutoFixture.AutoMoq" Version="4.17.0" />
      <PackageVersion Include="AutoFixture.NUnit3">
        <Version>4.17.0</Version>
      </PackageVersion>
      <PackageVersion Include="AutоFiхture.NUnit3" Version="4.17.0" />
      . . . snip . . .
    </ItemGroup>
  </Project>

But when I run a docker buildx bake -f docker-compose.yml in powershell or WSL - after a full system prune - I get errors like the following:

  /src/src/simul8.core/simul8.core.csproj : warning NU1604: Project dependency Antlr4.Runtime.Standard does not contain an inclusive lower bound. 
  Include a lower bound in the dependency version to ensure consistent restore results. [/src/src/simul8.runtime.host/simul8.runtime.host.csproj]
  /src/src/simul8.core/simul8.core.csproj : warning NU1701: Package 'Antlr4.Runtime.Standard 4.6.0' was restored using '.NETFramework,Version=v4.6.1, 
  .NETFramework,Version=v4.6.2, .NETFramework,Version=v4.7, .NETFramework,Version=v4.7.1, .NETFramework,Version=v4.7.2, .NETFramework,Version=v4.8, 
  .NETFramework,Version=v4.8.1' instead of the project target framework 'net6.0'. This package may not be fully compatible with your project. 
  [/src/src/simul8.runtime.host/simul8.runtime.host.csproj]
  

My understanding from the docs was that setting an explicit version like 4.10.1 is the same as setting a lower bound. I also tried using 4.10.* and [4.10.1, ), but it made no difference.

Here are the .NET SDKs installed locally on my machine (they are all net6.0 compatible)

  $ dotnet --list-sdks                                                                                                                                                                                                                                                           in pwsh at 11:03:44
  6.0.201 [C:\Program Files\dotnet\sdk]
  6.0.203 [C:\Program Files\dotnet\sdk]
  6.0.300 [C:\Program Files\dotnet\sdk]
  6.0.302 [C:\Program Files\dotnet\sdk]
  6.0.400-preview.22330.6 [C:\Program Files\dotnet\sdk]

I'm building locally on Microsoft Visual Studio Professional 2022 (64-bit) Version 17.3.0 Preview 5.0

The version 4.6.0 of the ANTLR4 runtime package is indeed not compatible with my code, and I can't roll back to using it, since there are features in v4.10 that I depend on.

What's happening?

Answer 1

You need to copy "Directory.Packages.props" into the Docker container in order to restore packages properly.

like this:

COPY ["/Directory.Packages.props","/"]