Tip: [time] directive when on a system that does not have a time command

[drewburlingame]

Use the following directive to output the time it took for a command to execute

myapp [time] mycmd will output time: 00:00:03.5349504 at the end of the call

here's the directive code

using System.Threading.Tasks;
using CommandDotNet;
using CommandDotNet.Directives;
using CommandDotNet.Execution;

internal static class TimeDirective
{
    internal static AppRunner UseTimerDirective(this AppRunner appRunner)
    {
        return appRunner.Configure(c =>
        {
            c.UseMiddleware(TimerDirective, MiddlewareSteps.DebugDirective + 1);
        });
    }

    private static Task<int> TimerDirective(CommandContext context, ExecutionDelegate next)
    {
        if (context.Original.Tokens.TryGetDirective("time", out _))
        {
            var sw = Stopwatch.StartNew();
            var result = next(context);
            sw.Stop();
            context.Console.WriteLine();
            context.Console.WriteLine($"time: {sw.Elapsed}");
            return result;
        }

        return next(context);
    }
}

Notice it runs immediately before the [debug] directive so it's the first step in the pipeline.

register it with the UseTimerDirective method appRunner.UseTimerDirective();

Let me know if you find it useful and I'll consider adding it to the core package.