spectre.console/src/Spectre.Console/Cli/Internal/Commands/VersionCommand.cs

using System.ComponentModel;
using System.Diagnostics.CodeAnalysis;

namespace Spectre.Console.Cli.Internal
{
    [Description("Displays the CLI library version")]
    [SuppressMessage("Performance", "CA1812: Avoid uninstantiated internal classes")]
    internal sealed class VersionCommand : Command<VersionCommand.Settings>
    {
        private readonly IAnsiConsole _writer;

        public VersionCommand(IConfiguration configuration)
        {
            _writer = configuration.Settings.Console.GetConsole();
        }

        public sealed class Settings : CommandSettings
        {
        }

        public override int Execute([NotNull] CommandContext context, [NotNull] Settings settings)
        {
            _writer.MarkupLine(
                "[yellow]Spectre.Cli[/] version [aqua]{0}[/]",
                VersionHelper.GetVersion(typeof(VersionCommand)?.Assembly));

            _writer.MarkupLine(
                "[yellow]Spectre.Console[/] version [aqua]{0}[/]",
                VersionHelper.GetVersion(typeof(IAnsiConsole)?.Assembly));

            return 0;
        }
    }
}