Add auto update to linux and macos

Source/LoadByOS/LinuxConfigApp/LinuxInterop.cs

@@ -1,14 +1,73 @@
 using LibationFileManager;
+using System.Diagnostics;
 
 namespace LinuxConfigApp
 {
     internal class LinuxInterop : IInteropFunctions
     {
-        public LinuxInterop() { }
+		//Different terminal apps possibly installed on a linux system
+		// [0] console executable
+		// [1] argument to set the concole's title
+		// [2] argument to pass a command to be executed to the terminal
+		static readonly string[][] consoleCommands =
+        {
+	        new[] {"konsole", "--title", "-e"},
+	        new[] {"gnome-terminal", "--title", "--"},
+	        new[] {"mate-terminal", "--title", "-x"},
+	        new[] {"xterm", "-T", "-e"},
+        };
+
+		public LinuxInterop() { }
         public LinuxInterop(params object[] values) { }
 
         public void SetFolderIcon(string image, string directory) => throw new PlatformNotSupportedException();
         public void DeleteFolderIcon(string directory) => throw new PlatformNotSupportedException();
-        public void CopyTextToClipboard(string text) => throw new PlatformNotSupportedException();
-    }
+
+		//only run the audo updater is the current app was installed from the
+		//.deb package. Try to detect this by checking if the symlink exists.
+		public bool CanUpdate => Directory.Exists("/usr/bin/libation");
+		public void InstallUpdate(string updateBundle)
+		{
+			RunAsRoot("apt", $"install '{updateBundle}'");
+		}
+
+		public Process RunAsRoot(string exe, string args)
+        {
+			//cribbed this script from VirtualBox's guest additions installer.
+			//It's designed to launch the system's gui superuser password
+			//prompt across multiple distributions and desktop environments.
+			const string runasroot = "/tmp/runasroot.sh";
+			File.WriteAllBytes(runasroot, Properties.Resources.runasroot);
+
+			string command = $"{exe ?? ""} {args ?? ""}".Trim();
+
+			foreach (var console in consoleCommands)
+			{
+				ProcessStartInfo psi = new()
+				{
+					FileName = console[0],
+					UseShellExecute = false,
+					ArgumentList =
+					{
+						console[1],
+						$"Running '{exe}' as root",
+						console[2],
+						"/bin/sh",
+						runasroot,
+						"Installing libation.deb",
+						command,
+						$"Please run '{command}' manually"
+					}
+				};
+
+
+				try
+				{
+					return Process.Start(psi);
+				}
+				catch { }
+			}
+			return null;
+		}
+	}
 }