dotnet-format creates empty files if non-existant file is given with charset

[legionaryu]

I'm using dotnet-format with Unity3D and for some reason every time I try to format using the project files generated by Unity3D , the dotnet-format creates some empty files and it breaks the Unity3D c-sharp compilation and I have to manually remove the empty files to make it work again.

For now, I'm formatting folders instead of the .sln/.csproj files.

[jmarolf]

@legionaryu what are the names of these empty files? Can you provide steps to reproduce the issue?

[legionaryu]

@jmarolf Just letting you know that I'm trying to isolate the issue because of the original project has sensitive information, so I cannot share it.
As soon as I'm able to reproduce it in another environment I'll upload it here.

[jmarolf]

Thanks @legionaryu! I understand that it can sometime be hard to reduce these cases. If you could tell me the version of dotnet format you are using as well as the commandline args that would be a great start.

[legionaryu]

Hi @jmarolf!
Good news, I was able to reproduce the issue with the attached project.
EmptyFile.zip

My version of dotnet-format is 3.3.111304+7c8f67a570f5fde6a247704733d6742f93c0fa48

From my tests, I was able to conclude that if a non-existant file is referenced in the csproj and the .editorconfig explicitly set a charset, the formatter creates an empty file with its name.

Here my csproj:

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

  <PropertyGroup>
    <OutputType>Exe</OutputType>
    <TargetFramework>netcoreapp5.0</TargetFramework>
  </PropertyGroup>

  <ItemGroup>
    <Compile Include="Empty.cs" /> <!--This file DOESN'T exists-->
  </ItemGroup>

</Project>

And here is my .editorconfig:

root = true

[*.*]
charset = utf-8

[jmarolf]

@legionaryu thanks! I've updated the title to reflect this.