Nullify ServerFactory

src/Tgstation.Server.Host/IServerFactory.cs

@@ -3,8 +3,6 @@ using System.Threading.Tasks;
 
 using Tgstation.Server.Host.IO;
 
-#nullable disable
-
 namespace Tgstation.Server.Host
 {
 	/// <summary>
@@ -24,6 +22,6 @@ namespace Tgstation.Server.Host
 		/// <param name="updatePath">The directory in which to install server updates.</param>
 		/// <param name="cancellationToken">The <see cref="CancellationToken"/> for the operation.</param>
 		/// <returns>A <see cref="ValueTask{TResult}"/> resulting in a new <see cref="IServer"/> if it should be run, <see langword="null"/> otherwise.</returns>
-		ValueTask<IServer> CreateServer(string[] args, string updatePath, CancellationToken cancellationToken);
+		ValueTask<IServer?> CreateServer(string[] args, string? updatePath, CancellationToken cancellationToken);
 	}
 }

src/Tgstation.Server.Host/Program.cs

@@ -83,7 +83,7 @@ namespace Tgstation.Server.Host
 			{
 				using var shutdownNotifier = new ProgramShutdownTokenSource();
 				var cancellationToken = shutdownNotifier.Token;
-				IServer server;
+				IServer? server;
 				try
 				{
 					server = await ServerFactory.CreateServer(

src/Tgstation.Server.Host/ServerFactory.cs

@@ -17,8 +17,6 @@ using Tgstation.Server.Host.IO;
 using Tgstation.Server.Host.Setup;
 using Tgstation.Server.Host.System;
 
-#nullable disable
-
 namespace Tgstation.Server.Host
 {
 	/// <summary>
@@ -53,7 +51,7 @@ namespace Tgstation.Server.Host
 		/// <inheritdoc />
 		// TODO: Decomplexify
 #pragma warning disable CA1506
-		public async ValueTask<IServer> CreateServer(string[] args, string updatePath, CancellationToken cancellationToken)
+		public async ValueTask<IServer?> CreateServer(string[] args, string? updatePath, CancellationToken cancellationToken)
 		{
 			ArgumentNullException.ThrowIfNull(args);
 
@@ -98,7 +96,8 @@ namespace Tgstation.Server.Host
 #if !NET8_0
 #error Validate this monstrosity works on current .NET
 #endif
-					IConfigurationSource cmdLineConfig, baseYmlConfig, environmentYmlConfig;
+					IConfigurationSource? cmdLineConfig;
+					IConfigurationSource baseYmlConfig, environmentYmlConfig;
 					if (args.Length == 0)
 					{
 						cmdLineConfig = null;