public StartResponse Start()

in Runtime/Core/GameLiftLocalTesting/GameLiftProcess.cs [26:93]
58 lines of code
5 McCabe index (conditional complexity)

        public StartResponse Start(StartRequest request)
        {
            try
            {
                if (request == null || string.IsNullOrWhiteSpace(request.GameLiftLocalFilePath))
                {
                    return Response.Fail(new StartResponse
                    {
                        ErrorCode = ErrorCode.InvalidParameters
                    });
                }

                string arg = FormatCommand(request);

                int processId;

                if (request.LocalOperatingSystem == LocalOperatingSystem.MAC_OS)
                {
                    // Starts a bash process to run an Apple script, which activates a new Terminal App window,
                    // and runs the GameLift local jar.
                    string activateTerminalScript = $"tell application \\\"Terminal\\\" to activate";
                    string setGameLiftLocalFilePath = $"set GameLiftLocalFilePathEnvVar to \\\"{request.GameLiftLocalFilePath}\\\"";
                    string runGameLiftLocalJarScript = $"\\\"java -jar \\\" & quoted form of GameLiftLocalFilePathEnvVar & \\\" -p {request.Port.ToString()}\\\"";
                    string runGameLiftLocal = $"tell application \\\"Terminal\\\" to do script {runGameLiftLocalJarScript}";
                    string osaScript = $"osascript -e \'{activateTerminalScript}\' -e \'{setGameLiftLocalFilePath}\' -e \'{runGameLiftLocal}\'";
                    string bashCommand = $" -c \"{osaScript}\"";

                    ProcessStartInfo processStartInfo = new ProcessStartInfo
                    {
                        UseShellExecute = false,
                        RedirectStandardOutput = true,
                        FileName = "/bin/bash",
                        CreateNoWindow = false,
                        Arguments = bashCommand,
                        WorkingDirectory = Path.GetDirectoryName(request.GameLiftLocalFilePath)
                    };

                    processId = ExecuteMacOsTerminalCommand(processStartInfo);
                }
                else
                {
                    ProcessStartInfo processStartInfo = new ProcessStartInfo
                    {
                        UseShellExecute = true,
                        FileName = "java",
                        Arguments = arg,
                        WorkingDirectory = Path.GetDirectoryName(request.GameLiftLocalFilePath)
                    };

                    processId = _processWrapper.Start(processStartInfo);
                }

                return Response.Ok(new StartResponse
                {
                    ProcessId = processId
                });
            }
            catch (Exception ex)
            {
                Logger.LogError(ex, ex.Message);

                return Response.Fail(new StartResponse
                {
                    ErrorCode = ErrorCode.UnknownError,
                    ErrorMessage = ex.Message
                });
            }
        }