Wrong paths when building/publishing in docker. about antlr4buildtasks

[kaby76]

Please provide:

• Your .csproj.
• Output from dotnet publish "./ProjectFolder/MyProject.csproj" --no-restore -c Release -v diag.

[MJLHThomassenHadrian]

My csproj file:

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

  <PropertyGroup>
    <TargetFramework>net8.0</TargetFramework>
    <ImplicitUsings>enable</ImplicitUsings>
    <Nullable>enable</Nullable>
  </PropertyGroup>

  <ItemGroup>
      <Antlr4 Include="MyLexer.g4">
        <Listener>false</Listener>
        <Visitor>true</Visitor>
        <Package>MyNamespace</Package>
      </Antlr4>
      <Antlr4 Include="MyParser.g4">
        <Listener>false</Listener>
        <Visitor>true</Visitor>
        <Package>MyNamespace</Package>
      </Antlr4>
  </ItemGroup>

  <ItemGroup>
    <PackageReference Include="Antlr4.Runtime.Standard" Version="4.13.1" />
    <PackageReference Include="Antlr4BuildTasks" Version="12.8.0" PrivateAssets="all" />
    <PackageReference Include="LinqKit.Microsoft.EntityFrameworkCore" Version="8.1.5" />
    <PackageReference Include="Microsoft.Extensions.Logging" Version="8.0.0" />
  </ItemGroup>

  <ItemGroup>
    <ProjectReference Include="..\SomeOtherProject.csproj" />
  </ItemGroup>

</Project>

dotnet publish output:

builder.log

I've 'redacted' some sensitive names as this is a project for my company, but the setup is identical to what we have.

What i noticed is that, even though this is executed inside a docker container, on line 2646 you see:

Task "ReadLinesFromFile" (TaskId:2)
#10 1.814                      Task Parameter:File=obj/Release/net8.0/MyProject.csproj.AntlrToCompileList.txt (TaskId:2)
#10 1.819                      Output Item(s): 
#10 1.819                          ToCompileFiles=
#10 1.819                              C:/Users/<myuser>/Documents/ProjectFolder/MyProject/obj/Release/net8.0/MyLexer.cs
#10 1.819                              C:/Users/<myuser>/Documents/ProjectFolder/MyProject/obj/Release/net8.0/MyParser.cs
#10 1.819                              C:/Users/<myuser>/Documents/ProjectFolder/MyProject/obj/Release/net8.0/MyParserBaseListener.cs
#10 1.819                              C:/Users/<myuser>/Documents/ProjectFolder/MyProject/obj/Release/net8.0/MyParserBaseVisitor.cs
#10 1.819                              C:/Users/<myuser>/Documents/ProjectFolder/MyProject/obj/Release/net8.0/MyParserListener.cs
#10 1.819                              C:/Users/<myuser>/Documents/ProjectFolder/MyProject/obj/Release/net8.0/MyParserVisitor.cs (TaskId:2)

Which is wierd, i would expect the paths there to be the paths in the docker container, not my local hard drive. This repeats further on in the logs.

For reference, the dockerfile looks like this:

FROM mcr.microsoft.com/dotnet/sdk:8.0 AS build
WORKDIR /

COPY ./ ./

RUN dotnet restore
RUN dotnet publish "./MyProject/MyProject.csproj" --no-restore -c Release -v diag

EDIT: I noticed docker cut off the log file so it might be incomplete. I'm trying to set up a minimal example that shows the issue, however, a very basic project setup with just 1 csproj file does seem to work, so im trying to see where the issue could be.

[MJLHThomassenHadrian]

Ok, i found the issue, it is a user error, sorry for bothering you (although your suggestion of printing diagnostic info did help me trace down the issue).

The problem was that both on our build agent AND locally, i already ran dotnet build -c Release before triggering the docker file. The Docker file's COPY step copies all files into the docker container, including the build files. When docker build runs, it takes the MyProject.csproj.AntlrToCompileList.txt file from the obj/Release/net8.0 directory instead of generating a new one. dotnet clean did not clean this directory, so the build inside docker just took the cached files, which have the wrong paths (paths from build outside docker).

Just deleting the obj folder and then running the docker build fixed the issue.