Implement updater

Luatrauma.AutoUpdater/Program.cs

@@ -1,10 +1,30 @@
-namespace Luatrauma.AutoUpdater
+using System.Diagnostics;
+
+namespace Luatrauma.AutoUpdater
 {
     internal class Program
     {
+        public static string[] Args;
+
         static void Main(string[] args)
         {
+            Args = args;
+
+            Task task = Start();
+            task.Wait();
+        }
+
+        public async static Task Start()
+        {
+            await Updater.Update();
+
+            Console.WriteLine("Update completed.");
 
+            if (Args.Length > 1)
+            {
+                Console.WriteLine("Starting " + string.Join(" ", Args));
+                Process.Start(Args[0], Args.Skip(1).ToArray());
+            }
         }
     }
 }

Luatrauma.AutoUpdater/Updater.cs

@@ -0,0 +1,62 @@
+using System;
+using System.Collections.Generic;
+using System.IO.Compression;
+using System.Linq;
+using System.Net;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Luatrauma.AutoUpdater
+{
+    static class Updater
+    {
+        public const string TempFolder = "Luatrauma.AutoUpdater.Temp";
+
+        public async static Task Update()
+        {
+            string patchUrl;
+
+#if WINDOWS
+            patchUrl = "https://github.com/evilfactory/LuaCsForBarotrauma/releases/download/latest/luacsforbarotrauma_patch_windows_client.zip";
+#elif LINUX
+            patchUrl = "https://github.com/evilfactory/LuaCsForBarotrauma/releases/download/latest/luacsforbarotrauma_patch_linux_client.zip";
+#elif MACOS
+            patchUrl = "https://github.com/evilfactory/LuaCsForBarotrauma/releases/download/latest/luacsforbarotrauma_patch_mac_client.zip;
+#endif
+
+            string tempFolder = Path.Combine(Directory.GetCurrentDirectory(), TempFolder);
+            string patchZip = Path.Combine(tempFolder, "patch.zip");
+
+            Directory.CreateDirectory(tempFolder);
+
+            Console.WriteLine("Downloading patch zip from {0}", patchUrl);
+
+            try
+            {
+                using var client = new HttpClient();
+                using var s = await client.GetStreamAsync(patchUrl);
+                using var fs = new FileStream(patchZip, FileMode.OpenOrCreate);
+                await s.CopyToAsync(fs);
+            }
+            catch (Exception e)
+            {
+                Console.WriteLine("Failed to download patch zip: {0}", e.Message);
+                return;
+            }
+
+            Console.WriteLine("Downloaded patch zip to {0}", patchZip);
+
+            try
+            {
+                ZipFile.ExtractToDirectory(patchZip, Directory.GetCurrentDirectory(), true);
+            }
+            catch (Exception e)
+            {
+                Console.WriteLine("Failed to extract patch zip: {0}", e.Message);
+                return;
+            }
+
+            Console.WriteLine("Extracted patch zip to {0}", Directory.GetCurrentDirectory());
+        }
+    }
+}