kmonitor

using System;
using System.Diagnostics;
using System.IO;

namespace kmonitor
{
    class Program
    {
        private static DateTime _lastRead = DateTime.MinValue;

        static void Main(string[] args)
        {
            var currentDirectory = AppDomain.CurrentDomain.BaseDirectory;
            var fileSystemWatcher = new FileSystemWatcher(currentDirectory);
            fileSystemWatcher.IncludeSubdirectories = true;
            fileSystemWatcher.NotifyFilter = NotifyFilters.LastAccess
                | NotifyFilters.LastWrite
                | NotifyFilters.FileName
                | NotifyFilters.DirectoryName;
            fileSystemWatcher.Changed += new FileSystemEventHandler(OnChanged);
            fileSystemWatcher.Created += new FileSystemEventHandler(OnChanged);
            fileSystemWatcher.Deleted += new FileSystemEventHandler(OnChanged);
            fileSystemWatcher.EnableRaisingEvents = true;

            Console.WriteLine("Starting server");
            StartProcess("k --watch web");
            Console.WriteLine("Press \'q\' to quit the web monitor.");
            while (Console.Read() != 'q') ;
        }

        private static Process StartProcess(string arguments)
        {
            var filename = "cmd.exe";
            var processStartInfo = new ProcessStartInfo(filename, " /C " + arguments);
            processStartInfo.RedirectStandardError = true;
            processStartInfo.RedirectStandardInput = true;
            processStartInfo.RedirectStandardOutput = true;
            processStartInfo.CreateNoWindow = true;
            processStartInfo.WindowStyle = ProcessWindowStyle.Hidden;
            processStartInfo.UseShellExecute = false;
            var process = Process.Start(processStartInfo);

            process.EnableRaisingEvents = true;
            process.OutputDataReceived += (o, dre) =>
            {
                Console.WriteLine(dre.Data);
            };

            process.BeginOutputReadLine();
            return process;
        }

        private static void OnChanged(object source, FileSystemEventArgs e)
        {
            DateTime lastWriteTime = File.GetLastWriteTime(e.FullPath);
            if (lastWriteTime != _lastRead)
            {
                var extension = Path.GetExtension(e.Name);
                if (extension.Equals(".json"))
                {
                    Console.WriteLine("{0} file modified. Package restore starting", e.Name);
                    var process = StartProcess("kpm restore");
                    process.WaitForExit();
                    if (process.ExitCode == 0)
                    {
                        Console.WriteLine("Package restore completed successfully. Restarting server.");
                        process = StartProcess("k --watch web");
                        process.WaitForExit();
                    }
                    else
                    {
                        Console.WriteLine("Package restore failed. Please make sure your {0} file is valid.", e.Name);
                    }
                }
                else
                {
                    Console.WriteLine("{0} file modified. Restarting server", e.Name);
                    var process = StartProcess("k --watch web");
                    process.WaitForExit();
                    if (process.ExitCode != 0)
                    {
                        Console.WriteLine("Server restart failed. Please make sure you can compile {0} file.", e.Name);
                    }
                }

                _lastRead = lastWriteTime;
            }
        }
    }
}