Workaround for when Unity complains about the missing RoslynAnalysisRunner folder.

RoslynDirectoryCreator.cs

using System.IO;
using System.Text.RegularExpressions;
using UnityEditor;
using UnityEngine;

[InitializeOnLoad]
internal static class RoslynDirectoryCreator
{
    static RoslynDirectoryCreator() => Application.logMessageReceived += OnLogMessageReceived;

    private static void OnLogMessageReceived(string message, string _, LogType logType)
    {
        if (logType != LogType.Exception)
            return;

        const string pattern =
                    @"^DirectoryNotFoundException: Could not find " +
                    @"a part of the path ('|"")Temp(\\|/)RoslynAnalysisRunner";

        if (Regex.IsMatch(message, pattern))
        {
            Directory.CreateDirectory("Temp/RoslynAnalysisRunner");
        }
    }
}

Could you please provide some explanation how to use this?

@Mol0ko
Hey, you just put the script in an Editor folder, and it starts working and prevents Roslyn-related errors.

Thanks a lot, it works