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Hosting

Nullean.Argh.Hosting plugs the same command registration model into IHost and Microsoft.Extensions.DependencyInjection. No custom bootstrapping or glue code needed.

<ItemGroup>
  <PackageReference Include="Nullean.Argh.Hosting" />
</ItemGroup>

services.AddArgh(args, b => { … }) mirrors the same Map / Map<T> / UseGlobalOptions / UseNamespaceOptions / UseMiddleware / MapNamespace surface as ArghApp, and additionally lets you control DI lifetimes.

using Microsoft.Extensions.Hosting;
using Nullean.Argh.Hosting;

var builder = Host.CreateApplicationBuilder(args);

builder.Services.AddArgh(args, b =>
{
    b.Map("hello", MyHandlers.SayHello);
});

await builder.Build().RunAsync();
Important

AddArgh registers a hosted service that runs ArghRuntime.RunAsync(args) and then calls Environment.Exit with the exit code. The host does not continue after the CLI completes.

  • CancellationToken on command handlers is linked to both Ctrl+C and IHostApplicationLifetime.ApplicationStopping.
  • Register AddArgh before other IHostedService registrations if you want the CLI to run first and exit without starting later background work.