public static string MuxerPathOrDefault()

in src/Microsoft.NET.Sdk.Functions.MSBuild/Tasks/DotNetMuxer.cs [36:82]
37 lines of code
8 McCabe index (conditional complexity)

        public static string MuxerPathOrDefault()
            => MuxerPath ?? MuxerName;

        private static string TryFindMuxerPath()
        {
            var fileName = MuxerName;
            if (RuntimeInformation.IsOSPlatform(OSPlatform.Windows))
            {
                fileName += ".exe";
            }

            var mainModule = Process.GetCurrentProcess().MainModule;
            if (!string.IsNullOrEmpty(mainModule?.FileName)
                && Path.GetFileName(mainModule.FileName).Equals(fileName, StringComparison.OrdinalIgnoreCase))
            {
                return mainModule.FileName;
            }

            // if Process.MainModule is not available or it does not equal "dotnet(.exe)?", fallback to navigating to the muxer
            // by using the location of the shared framework

            var method = typeof(AppContext).GetMethod("GetData", BindingFlags.Public | BindingFlags.Static);
            var fxDepsFile = method != null
                ? method.Invoke(null, new[] { "FX_DEPS_FILE" }) as string
                : null;

            if (string.IsNullOrEmpty(fxDepsFile))
            {
                return null;
            }

            var muxerDir = new FileInfo(fxDepsFile) // Microsoft.NETCore.App.deps.json
                .Directory? // (version)
                .Parent? // Microsoft.NETCore.App
                .Parent? // shared
                .Parent; // DOTNET_HOME

            if (muxerDir == null)
            {
                return null;
            }

            var muxer = Path.Combine(muxerDir.FullName, fileName);
            return File.Exists(muxer)
                ? muxer
                : null;
        }