feat: wip...migrating to proper app

src/StreamShorts.Console/Hosting/HostBuilderExtensions.cs

@@ -0,0 +1,21 @@
+namespace StreamShorts.Console.Hosting;
+
+internal static class HostBuilderExtensions
+{
+  public static CommandApp<DefaultCommand> BuildApp(this IHostBuilder builder)
+  {
+    var registrar = new TypeRegistrar(builder);
+    var app = new CommandApp<DefaultCommand>(registrar);
+
+    app.Configure(static c =>
+      c.SetExceptionHandler(static (ex, resolver) =>
+      {
+        var console = resolver?.Resolve(typeof(IAnsiConsole)) as IAnsiConsole;
+        console?.WriteLine($"[red]An error occurred while executing the command:[/]");
+        console?.WriteException(ex, ExceptionFormats.ShortenEverything);
+      })
+    );
+
+    return app;
+  }
+}

src/StreamShorts.Console/Hosting/TypeRegistrar.cs

@@ -0,0 +1,28 @@
+namespace StreamShorts.Console.Hosting;
+
+internal class TypeRegistrar(IHostBuilder builder) : ITypeRegistrar
+{
+  private readonly IHostBuilder _builder = builder;
+
+  public ITypeResolver Build()
+  {
+    return new TypeResolver(_builder.Build());
+  }
+
+  public void Register(Type service, Type implementation)
+  {
+    _builder.ConfigureServices((_, services) => services.AddSingleton(service, implementation));
+  }
+
+  public void RegisterInstance(Type service, object implementation)
+  {
+    _builder.ConfigureServices((_, services) => services.AddSingleton(service, implementation));
+  }
+
+  public void RegisterLazy(Type service, Func<object> func)
+  {
+    ArgumentNullException.ThrowIfNull(func);
+
+    _builder.ConfigureServices((_, services) => services.AddSingleton(service, _ => func()));
+  }
+}

src/StreamShorts.Console/Hosting/TypeResolver.cs

@@ -0,0 +1,16 @@
+namespace StreamShorts.Console.Hosting;
+
+internal class TypeResolver(IHost provider) : ITypeResolver, IDisposable
+{
+  private readonly IHost _host = provider ?? throw new ArgumentNullException(nameof(provider));
+
+  public object? Resolve(Type? type)
+  {
+    return type is not null ? _host.Services.GetService(type) : null;
+  }
+
+  public void Dispose()
+  {
+    _host.Dispose();
+  }
+}