Injecting services which needs IOptions<TOptions>, where TOptions should be built from command settings.

[ledouxpl]

Hi,

I am in a bit of a catch-22 here.

Based on the [https://github.com/spectreconsole/spectre.console/tree/main/examples/Cli/Injection](dependency injection) sample, I am registering various services.

eg:

var services = new ServiceCollection();

services
  .AddSingleton<IFoobar, Foobar>()
  .AddCommands();

var registrar = services.ToTypeRegistrar();

var app = new CommandApp(registrar);

// Configure console application.
app.Configure(config => config
  .SetApplicationName("Foo")
  .UseStrictParsing()
  .PropagateExceptions()
  .AddTransient<FooCommand>();

return await app.RunAsync(args);

The FooCommand constructor requires an instance of IFoobar.

public class FooCommand : AsyncCommand<FooCommand.Settings>
{
  private readonly IFoobar _foobar;

  public class Settings : CommandSettings
  {
    [Description("Api Key")]
    [CommandOption("-k|--key <KEY>")]
    public string? Key { get; set; }
  }

  public FooCommand(IFoobar foobar)
  {
    _foobar = foobar;
  }

However, the Foobar service's constructor requires an IOptions<FoobarOptions>.

I would therefore need to configure through the IServiceCollection the options, however I cannot since the command settings are not yet availabe.

What is the proper way to go about this? If there could be a way to parse command settings ahead of time, before running the CommandApp that would be great.

To me this sounds like a common scenario, however I cannot figure out a way to do it.

Any help would be appreciated!