Using Bullseye with custom args with McMaster.Extensions.CommandLineUtils

bullseye-custom-args-mcmaster.cs

// dotnet add package McMaster.Extensions.CommandLineUtils

using System.Linq;
using McMaster.Extensions.CommandLineUtils;
using static Bullseye.Targets;

class Program
{
    static void Main(string[] args)
    {
        var app = new CommandLineApplication(throwOnUnexpectedArg: false);

        var targets = app.Option<string>("--targets", "The targets to run or list.", CommandOptionType.MultipleValue);
        var foo = app.Option<string>("--foo", "A value used for something.", CommandOptionType.SingleValue);

        app.OnExecute(() =>
        {
            Target("build", () => System.Console.WriteLine($"foo = {foo.Value()}"));
            
            Target("default", DependsOn("build"));
            
            RunTargetsAndExit(targets.Values.Concat(app.RemainingArguments));
        });

        app.Execute(args);
    }
}

// To run the default target:
// dotnet run -- --foo=bar
//
// To run a single specific target:
// dotnet run -- --target build --foo=bar
//
// To run multiple specific targets:
// dotnet run -- --target default --target build --foo=bar