using DeclarativeCommandLine;
using Microsoft.Extensions.DependencyInjection;
namespace MyApp;
[Command(Description = "Math commands")]
public class AppRootCommand
{
}
[Command(Description = "Add 2 numbers", Parent = typeof(AppRootCommand))]
public class AddCommand : ICommand
{
[Option(Required = true)]
public int ValueA { get; set; }
[Option(Required = true)]
public int ValueB { get; set; }
public void Execute()
{
Console.WriteLine($"A={ValueA} + {ValueB} = {ValueA + ValueB}");
}
}
public static class Program
{
public static int Main(string[] args)
{
var p = new ServiceCollection()
.AddTransient<AppRootCommand>()
.AddTransient<AddCommand>()
.BuildServiceProvider();
return new CommandBuilder()
.Build(t => p.GetRequiredService(t))
.Parse(args)
.Invoke();
}
}
Result
$ ./myapp
Required command was not provided.
Description:
Usage:
myapp [command] [options]
Options:
-?, -h, --help Show help and usage information
--version Show version information
Commands:
add
$ ./myapp add
Option '--value-a' is required.
Option '--value-b' is required.
Description:
Usage:
myapp add [options]
Options:
--value-a <value-a> (REQUIRED)
--value-b <value-b> (REQUIRED)
-?, -h, --help Show help and usage information
