Name: ConsoleAppFramework
Author: Cysharp

ConsoleAppFramework v5.7.6 — nugetz

using ConsoleAppFramework;

// args: ./cmd --foo 10 --bar 20
ConsoleApp.Run(args, (int foo, int bar) => Console.WriteLine($"Sum: {foo + bar}"));

internal static partial class ConsoleApp
{
    // Generate the Run method itself with arguments and body to match the lambda expression
    public static void Run(string[] args, Action<int, int> command)
    {
        // code body
    }
}

Full generated source code

namespace ConsoleAppFramework;

internal static partial class ConsoleApp
{
    public static void Run(string[] args, Action<int, int> command)
    {
        if (TryShowHelpOrVersion(args, 2, -1)) return;

        var arg0 = default(int);
        var arg0Parsed = false;
        var arg1 = default(int);
        var arg1Parsed = false;

        try
        {
            for (int i = 0; i < args.Length; i++)
            {
                var name = args[i];

                switch (name)
                {
                    case "--foo":
                    {
                        if (!TryIncrementIndex(ref i, args.Length) || !int.TryParse(args[i], out arg0)) { ThrowArgumentParseFailed("foo", args[i]); }
                        arg0Parsed = true;
                        break;
                    }
                    case "--bar":
                    {
                        if (!TryIncrementIndex(ref i, args.Length) || !int.TryParse(args[i], out arg1)) { ThrowArgumentParseFailed("bar", args[i]); }
                        arg1Parsed = true;
                        break;
                    }
                    default:
                        if (string.Equals(name, "--foo", StringComparison.OrdinalIgnoreCase))
                        {
                            if (!TryIncrementIndex(ref i, args.Length) || !int.TryParse(args[i], out arg0)) { ThrowArgumentParseFailed("foo", args[i]); }
                            arg0Parsed = true;
                            break;
                        }
                        if (string.Equals(name, "--bar", StringComparison.OrdinalIgnoreCase))
                        {
                            if (!TryIncrementIndex(ref i, args.Length) || !int.TryParse(args[i], out arg1)) { ThrowArgumentParseFailed("bar", args[i]); }
                            arg1Parsed = true;
                            break;
                        }
                        ThrowArgumentNameNotFound(name);
                        break;
                }
            }
            if (!arg0Parsed) ThrowRequiredArgumentNotParsed("foo");
            if (!arg1Parsed) ThrowRequiredArgumentNotParsed("bar");

            command(arg0!, arg1!);
        }
        catch (Exception ex)
        {
            Environment.ExitCode = 1;
            if (ex is ValidationException or ArgumentParseFailedException)
            {
                LogError(ex.Message);
            }
            else
            {
                LogError(ex.ToString());
            }
        }
    }

    [MethodImpl(MethodImplOptions.AggressiveInlining)]
    static bool TryIncrementIndex(ref int index, int length)
    {
        if (index < length)
        {
            index++;
            return true;
        }
        return false;
    }

    static partial void ShowHelp(int helpId)
    {
        Log("""
Usage: [options...] [-h|--help] [--version]

Options:
  --foo <int>     (Required)
  --bar <int>     (Required)
""");
    }
}

using ConsoleAppFramework;

ConsoleApp.Run(args, (string name) => Console.WriteLine($"Hello {name}"));

ConsoleApp.Run(args, Sum);

void Sum(int x, int y) => Console.Write(x + y);

unsafe
{
    ConsoleApp.Run(args, &Sum);
}

static void Sum(int x, int y) => Console.Write(x + y);

public static unsafe void Run(string[] args, delegate* managed<int, int, void> command)

// --foo, --bar
await ConsoleApp.RunAsync(args, async (int foo, int bar, CancellationToken cancellationToken) =>
{
    await Task.Delay(TimeSpan.FromSeconds(5), cancellationToken);
    Console.WriteLine($"Sum: {foo + bar}");
});

ConsoleApp.Run(args, (string message) => Console.Write($"Hello, {message}"));

Usage: [options...] [-h|--help] [--version]

Options:
  --message <string>     (Required)

ConsoleApp.Run(args, Commands.Hello);

static class Commands
{
    /// <summary>
    /// Display Hello.
    /// </summary>
    /// <param name="message">-m, Message to show.</param>
    public static void Hello(string message) => Console.Write($"Hello, {message}");
}

Usage: [options...] [-h|--help] [--version]

Display Hello.

Options:
  -m|--message <string>    Message to show. (Required)

ConsoleApp.Run(args, (Fruit myFruit = Fruit.Apple, [HideDefaultValue] Fruit myFruit2 = Fruit.Grape) => { });

enum Fruit
{
    Orange, Grape, Apple
}

Usage: [options...] [-h|--help] [--version]

Options:
  --my-fruit <Fruit>      (Default: Apple)
  --my-fruit2 <Fruit>

var app = ConsoleApp.Create();

app.Add("", (string msg) => Console.WriteLine(msg));
app.Add("echo", (string msg) => Console.WriteLine(msg));
app.Add("sum", (int x, int y) => Console.WriteLine(x + y));

// --msg
// echo --msg
// sum --x --y
app.Run(args);

var app = ConsoleApp.Create();
app.Add<MyCommands>();
app.Run(args);

public class MyCommands
{
    /// <summary>Root command test.</summary>
    /// <param name="msg">-m, Message to show.</param>
    [Command("")]
    public void Root(string msg) => Console.WriteLine(msg);

    /// <summary>Display message.</summary>
    /// <param name="msg">Message to show.</param>
    public void Echo(string msg) => Console.WriteLine(msg);

    /// <summary>Sum parameters.</summary>
    /// <param name="x">left value.</param>
    /// <param name="y">right value.</param>
    public void Sum(int x, int y) => Console.WriteLine(x + y);
}

Usage: [command] [options...] [-h|--help] [--version]

Root command test.

Options:
  -m|--msg <string>    Message to show. (Required)

Commands:
  echo    Display message.
  sum     Sum parameters.

var app = ConsoleApp.Create();

app.Add("foo", () => { });
app.Add("foo bar", () => { });
app.Add("foo bar barbaz", () => { });
app.Add("foo baz", () => { });

// Commands:
//   foo
//   foo bar
//   foo bar barbaz
//   foo baz
app.Run(args);

var app = ConsoleApp.Create();
app.Add<MyCommands>("foo");

// Commands:
//  foo         Root command test.
//  foo echo    Display message.
//  foo sum     Sum parameters.
app.Run(args);

[RegisterCommands]
public class Foo
{
    public void Baz(int x)
    {
        Console.Write(x);
    }
}

[RegisterCommands("bar")]
public class Bar
{
    public void Baz(int x)
    {
        Console.Write(x);
    }
}

var app = ConsoleApp.Create();

// Commands:
//   baz
//   bar baz
app.Run(args);

app.Add("foo", () => { });
app.Add("foo bar", (int x, int y) => { });
app.Add("foo bar barbaz", (DateTime dateTime) => { });
app.Add("foo baz", async (string foo = "test", CancellationToken cancellationToken = default) => { });

partial class ConsoleAppBuilder
{
    Action command0 = default!;
    Action<int, int> command1 = default!;
    Action<global::System.DateTime> command2 = default!;
    Func<string, global::System.Threading.CancellationToken, Task> command3 = default!;

    partial void AddCore(string commandName, Delegate command)
    {
        switch (commandName)
        {
            case "foo":
                this.command0 = Unsafe.As<Action>(command);
                break;
            case "foo bar":
                this.command1 = Unsafe.As<Action<int, int>>(command);
                break;
            case "foo bar barbaz":
                this.command2 = Unsafe.As<Action<global::System.DateTime>>(command);
                break;
            case "foo baz":
                this.command3 = Unsafe.As<Func<string, global::System.Threading.CancellationToken, Task>>(command);
                break;
            default:
                break;
        }
    }
}

partial void RunCore(string[] args)
{
    if (args.Length == 0)
    {
        ShowHelp(-1);
        return;
    }
    switch (args[0])
    {
        case "foo":
            if (args.Length == 1)
            {
                RunCommand0(args, args.AsSpan(1), command0);
                return;
            }
            switch (args[1])
            {
                case "bar":
                    if (args.Length == 2)
                    {
                        RunCommand1(args, args.AsSpan(2), command1);
                        return;
                    }
                    switch (args[2])
                    {
                        case "barbaz":
                            RunCommand2(args, args.AsSpan(3), command2);
                            break;
                        default:
                            RunCommand1(args, args.AsSpan(2), command1);
                            break;
                    }
                    break;
                case "baz":
                    RunCommand3(args, args.AsSpan(2), command3);
                    break;
                default:
                    RunCommand0(args, args.AsSpan(1), command0);
                    break;
            }
            break;
        default:
            ShowHelp(-1);
            break;
    }
}

using ConsoleAppFramework;

[assembly: ConsoleAppFrameworkGeneratorOptions(DisableNamingConversion = true)]

var app = ConsoleApp.Create();
app.Add<MyProjectCommand>();
app.Run(args);

public class MyProjectCommand
{
    public void ExecuteCommand(string fooBarBaz)
    {
        Console.WriteLine(fooBarBaz);
    }
}

ConsoleApp.Run(args, (
    [Argument]DateTime dateTime,  // Argument
    [Argument]Guid guidvalue,     // 
    int intVar,                   // required
    bool boolFlag,                // flag
    MyEnum enumValue,             // enum
    int[] array,                  // array
    MyClass obj,                  // object
    string optional = "abcde",    // optional
    double? nullableValue = null, // nullable
    params string[] paramsArray   // params
    ) => { });

var app = ConsoleApp.Create();
// builder: Func<ref ConsoleApp.GlobalOptionsBuilder, object>
app.ConfigureGlobalOptions((ref builder) =>
{
    var dryRun = builder.AddGlobalOption<bool>("--dry-run");
    var verbose = builder.AddGlobalOption<bool>("-v|--verbose");
    var intParameter = builder.AddRequiredGlobalOption<int>("--int-parameter", "integer parameter");
    // return value stored to ConsoleAppContext.GlobalOptions
    return new GlobalOptions(dryRun, verbose, intParameter);
});
app.Add("", (int x, int y, ConsoleAppContext context) =>
{
    var globalOptions = (GlobalOptions)context.GlobalOptions;
    Console.WriteLine(globalOptions + ":" + (x, y));
});
app.Run(args);
internal record GlobalOptions(bool DryRun, bool Verbose, int IntParameter);

var app = ConsoleApp.Create();

// builder: Func<ref ConsoleApp.GlobalOptionsBuilder, object>
app.ConfigureGlobalOptions((ref builder) =>
{
    var dryRun = builder.AddGlobalOption<bool>("--dry-run");
    var verbose = builder.AddGlobalOption<bool>("-v|--verbose");
    var intParameter = builder.AddRequiredGlobalOption<int>("--int-parameter", "integer parameter");

    // return value stored to ConsoleAppContext.GlobalOptions
    return new GlobalOptions(dryRun, verbose, intParameter);
});

app.ConfigureServices((context, configuration, services) =>
{
    // store global-options to DI
    var globalOptions = (GlobalOptions)context.GlobalOptions;
    services.AddSingleton(globalOptions);

    // check global-options value to configure services
    services.AddLogging(logging =>
    {
        if (globalOptions.Verbose)
        {
            logging.SetMinimumLevel(LogLevel.Trace);
        }
    });
});

app.Add<Commands>();

app.Run(args);

internal record GlobalOptions(bool DryRun, bool Verbose, int IntParameter);

// get GlobalOptions from DI
internal class Commands(GlobalOptions globalOptions)
{
    [Command("cmd-a")]
    public void CommandA(int x, int y)
    {
        Console.WriteLine("A:" + globalOptions + ":" + (x, y));
    }

    [Command("cmd-b")]
    public void CommandB(int x, int y)
    {
        Console.WriteLine("B:" + globalOptions + ":" + (x, y));
    }
}

[AttributeUsage(AttributeTargets.Parameter)]
public class Vector3ParserAttribute : Attribute, IArgumentParser<Vector3>
{
    public static bool TryParse(ReadOnlySpan<char> s, out Vector3 result)
    {
        Span<Range> ranges = stackalloc Range[3];
        var splitCount = s.Split(ranges, ',');
        if (splitCount != 3)
        {
            result = default;
            return false;
        }

        float x;
        float y;
        float z;
        if (float.TryParse(s[ranges[0]], out x) && float.TryParse(s[ranges[1]], out y) && float.TryParse(s[ranges[2]], out z))
        {
            result = new Vector3(x, y, z);
            return true;
        }

        result = default;
        return false;
    }
}

ConsoleApp.Run(args, ([Vector3Parser] Vector3 position) => Console.WriteLine(position));

// dotnet run --project foo.csproj -- --foo 100 --bar bazbaz
var app = ConsoleApp.Create();
app.Add("run", (string project, ConsoleAppContext context) =>
{
    // run --project foo.csproj -- --foo 100 --bar bazbaz
    Console.WriteLine(string.Join(" ", context.Arguments));
    // --project foo.csproj
    Console.WriteLine(string.Join(" ", context.CommandArguments!));
    // --foo 100 --bar bazbaz
    Console.WriteLine(string.Join(" ", context.EscapedArguments!));
});
app.Run(args);

using var posixSignalHandler = PosixSignalHandler.Register(ConsoleApp.Timeout);
var arg0 = posixSignalHandler.Token;

await Task.Run(() => command(arg0!)).WaitAsync(posixSignalHandler.TimeoutToken);

var cancellationTokenSource = new CancellationTokenSource();

var app = ConsoleApp.Create();

app.Add("", (CancellationToken cancellationToken) =>
{
    // do anything...
});

await app.RunAsync(args, cancellationTokenSource.Token); // pass external CancellationToken

// return Random ExitCode...
ConsoleApp.Run(args, int () => Random.Shared.Next());

// return StatusCode
await ConsoleApp.RunAsync(args, async Task<int> (string url, CancellationToken cancellationToken) =>
{
    using var client = new HttpClient();
    var response = await client.GetAsync(url, cancellationToken);
    return (int)response.StatusCode;
});

ConsoleApp.Run(args, ([EmailAddress] string firstArg, [Range(0, 2)] int secondArg) => { });

The firstArg field is not a valid e-mail address.
The field secondArg must be between 0 and 2.

internal class NopFilter(ConsoleAppFilter next) : ConsoleAppFilter(next) // ctor needs `ConsoleAppFilter next` and call base(next)
{
    // implement InvokeAsync as filter body
    public override async Task InvokeAsync(ConsoleAppContext context, CancellationToken cancellationToken)
    {
        try
        {
            /* on before */
            await Next.InvokeAsync(context, cancellationToken); // invoke next filter or command body
            /* on after */
        }
        catch
        {
            /* on error */
            throw;
        }
        finally
        {
            /* on finally */
        }
    }
}

var app = ConsoleApp.Create();

// global filters
app.UseFilter<NopFilter>(); //order 1
app.UseFilter<NopFilter>(); //order 2

app.Add<MyCommand>();
app.Run(args);

// per class filters
[ConsoleAppFilter<NopFilter>] // order 3
[ConsoleAppFilter<NopFilter>] // order 4
public class MyCommand
{
    // per method filters
    [ConsoleAppFilter<NopFilter>] // order 5
    [ConsoleAppFilter<NopFilter>] // order 6
    public void Echo(string msg) => Console.WriteLine(msg);
}

internal class LogRunningTimeFilter(ConsoleAppFilter next) : ConsoleAppFilter(next)
{
    public override async Task InvokeAsync(ConsoleAppContext context, CancellationToken cancellationToken)
    {
        var startTime = Stopwatch.GetTimestamp();
        ConsoleApp.Log($"Execute command at {DateTime.UtcNow.ToLocalTime()}"); // LocalTime for human readable time
        try
        {
            await Next.InvokeAsync(context, cancellationToken);
            ConsoleApp.Log($"Command execute successfully at {DateTime.UtcNow.ToLocalTime()}, Elapsed: " + (Stopwatch.GetElapsedTime(startTime)));
        }
        catch
        {
            ConsoleApp.Log($"Command execute failed at {DateTime.UtcNow.ToLocalTime()}, Elapsed: " + (Stopwatch.GetElapsedTime(startTime)));
            throw;
        }
    }
}

internal class ChangeExitCodeFilter(ConsoleAppFilter next) : ConsoleAppFilter(next)
{
    public override async Task InvokeAsync(ConsoleAppContext context, CancellationToken cancellationToken)
    {
        try
        {
            await Next.InvokeAsync(context, cancellationToken);
        }
        catch (Exception ex)
        {
            if (ex is OperationCanceledException) return;

            Environment.ExitCode = 9999; // change custom exit code
            ConsoleApp.LogError(ex.Message); // .ToString() shows stacktrace, .Message can avoid showing stacktrace to user.
        }
    }
}

internal class PreventMultipleSameCommandInvokeFilter(ConsoleAppFilter next) : ConsoleAppFilter(next)
{
    public override async Task InvokeAsync(ConsoleAppContext context, CancellationToken cancellationToken)
    {
        var basePath = Assembly.GetEntryAssembly()?.Location.Replace(Path.DirectorySeparatorChar, '_');
        var mutexKey = $"{basePath}$$${context.CommandName}"; // lock per command-name

        using var mutex = new Mutex(true, mutexKey, out var createdNew);
        if (!createdNew)
        {
            throw new Exception($"already running command:{context.CommandName} in another process.");
        }

        await Next.InvokeAsync(context, cancellationToken);
    }
}

internal class AuthenticationFilter(ConsoleAppFilter next) : ConsoleAppFilter(next)
{
    public override async Task InvokeAsync(ConsoleAppContext context, CancellationToken cancellationToken)
    {
        var requestId = Guid.NewGuid();
        var userId = await GetUserIdAsync();

        // setup new state to context
        var authedContext = context with { State = new ApplicationContext(requestId, userId) };
        await Next.InvokeAsync(authedContext, cancellationToken);
    }

    // get user-id from DB/auth saas/others
    async Task<int> GetUserIdAsync()
    {
        await Task.Delay(TimeSpan.FromSeconds(1));
        return 1999;
    }
}

record class ApplicationContext(Guid RequiestId, int UserId);

var app = ConsoleApp.Create();

app.UseFilter<AuthenticationFilter>();

app.Add("", (int x, int y, ConsoleAppContext context) =>
{
    var appContext = (ApplicationContext)context.State!;
    var requestId = appContext.RequiestId;
    var userId = appContext.UserId;

    Console.WriteLine($"Request:{requestId} User:{userId} Sum:{x + y}");
});

app.Run(args);

app.UseFilter<NopFilter>();
app.UseFilter<NopFilter>();
app.UseFilter<NopFilter>();
app.UseFilter<NopFilter>();
app.UseFilter<NopFilter>();

// The above code will generate the following code:

sealed class Command0Invoker(string[] args, Action command) : ConsoleAppFilter(null!)
{
    public ConsoleAppFilter BuildFilter()
    {
        var filter0 = new NopFilter(this);
        var filter1 = new NopFilter(filter0);
        var filter2 = new NopFilter(filter1);
        var filter3 = new NopFilter(filter2);
        var filter4 = new NopFilter(filter3);
        return filter4;
    }

    public override Task InvokeAsync(ConsoleAppContext context, CancellationToken cancellationToken)
    {
        return RunCommand0Async(context.Arguments, args, command, context, cancellationToken);
    }
}

var app = ConsoleApp.Create()
    .ConfigureServices(service =>
    {
        service.AddTransient<MyService>();
    });

app.Add("", ([FromServices] MyService service, int x, int y) => Console.WriteLine(x + y));

app.Run(args);

// Package Import: ZLogger
var app = ConsoleApp.Create()
    .ConfigureLogging(x =>
    {
        x.ClearProviders();
        x.SetMinimumLevel(LogLevel.Trace);
        x.AddZLoggerConsole();
        x.AddZLoggerFile("log.txt");
    });

app.Add<MyCommand>();
app.Run(args);

// inject logger to constructor
public class MyCommand(ILogger<MyCommand> logger)
{
    public void Echo(string msg)
    {
        logger.ZLogInformation($"Message is {msg}");
    }
}

// Microsoft.Extensions.DependencyInjection
var services = new ServiceCollection();
services.AddTransient<MyService>();

using var serviceProvider = services.BuildServiceProvider();

// Any DI library can be used as long as it can create an IServiceProvider
ConsoleApp.ServiceProvider = serviceProvider;

// When passing to a lambda expression/method, using [FromServices] indicates that it is passed via DI, not as a parameter
ConsoleApp.Run(args, ([FromServices]MyService service, int x, int y) => Console.WriteLine(x + y));

app.UseFilter<ReplaceLogFilter>();

// inject logger to filter
internal sealed class ReplaceLogFilter(ConsoleAppFilter next, ILogger<Program> logger)
    : ConsoleAppFilter(next)
{
    public override Task InvokeAsync(ConsoleAppContext context, CancellationToken cancellationToken)
    {
        ConsoleApp.Log = msg => logger.LogInformation(msg);
        ConsoleApp.LogError = msg => logger.LogError(msg);

        return Next.InvokeAsync(context, cancellationToken);
    }
}

{
  "Position": {
    "Title": "Editor",
    "Name": "Joe Smith"
  },
  "MyKey": "My appsettings.json Value",
  "AllowedHosts": "*"
}

<ItemGroup>
    <None Update="appsettings.json">
        <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
    </None>
</ItemGroup>

// Package Import: Microsoft.Extensions.Configuration.Json
var app = ConsoleApp.Create()
    .ConfigureDefaultConfiguration()
    .ConfigureServices((configuration, services) =>
    {
        // Package Import: Microsoft.Extensions.Options.ConfigurationExtensions
        services.Configure<PositionOptions>(configuration.GetSection("Position"));
    });

app.Add<MyCommand>();
app.Run(args);

// inject options
public class MyCommand(IOptions<PositionOptions> options)
{
    public void Echo(string msg)
    {
        ConsoleApp.Log($"Binded Option: {options.Value.Title} {options.Value.Name}");
    }
}

public class PositionOptions
{
    public string Title { get; set; } = "";
    public string Name { get; set; } = "";
}

<ItemGroup>
	<PackageReference Include="Microsoft.Extensions.Configuration.Json" Version="9.0.0" />
	<PackageReference Include="Microsoft.Extensions.Options.ConfigurationExtensions" Version="9.0.0" />
	<PackageReference Include="ZLogger" Version="2.5.9" />
</ItemGroup>

app.UseFilter<ServiceProviderScopeFilter>();

internal class ServiceProviderScopeFilter(IServiceProvider serviceProvider, ConsoleAppFilter next) : ConsoleAppFilter(next)
{
    public override async Task InvokeAsync(ConsoleAppContext context, CancellationToken cancellationToken)
    {
        // create Microsoft.Extensions.DependencyInjection scope
        await using var scope = serviceProvider.CreateAsyncScope();

        var originalServiceProvider = ConsoleApp.ServiceProvider;
        ConsoleApp.ServiceProvider = scope.ServiceProvider;
        try
        {
            await Next.InvokeAsync(context, cancellationToken);
        }
        finally
        {
            ConsoleApp.ServiceProvider = originalServiceProvider;
        }
    }
}

// dotnet add package Microsoft.Extensions.Hosting
var app = Host.CreateApplicationBuilder()
    .ToConsoleAppBuilder();

// dotnet add package Microsoft.Extensions.DependencyInjection
// dotnet add package DryIoc.Microsoft.DependencyInjection
var app = ConsoleApp.Create()
    // setup DryIoc as the DI container
    .ConfigureContainer(new DryIocServiceProviderFactory(), container =>
    {
        container.Register<MyService>();
    });

app.Add("", ([FromServices] MyService service) => { });

app.Run(args);

<!-- csproj, reference OpenTelemetry packages -->
<ItemGroup>
    <PackageReference Include="Microsoft.Extensions.Hosting" Version="9.0.6" />
    <PackageReference Include="OpenTelemetry.Exporter.OpenTelemetryProtocol" Version="1.9.0" />
    <PackageReference Include="OpenTelemetry.Extensions.Hosting" Version="1.9.0" />
    <PackageReference Include="OpenTelemetry.Instrumentation.Runtime" Version="1.9.0" />
    <PackageReference Include="OpenTelemetry.Instrumentation.Http" Version="1.9.0" />
</ItemGroup>

public static class ConsoleAppFrameworkSampleActivitySource
{
    public const string Name = "ConsoleAppFrameworkSample";

    public static ActivitySource Instance { get; } = new ActivitySource(Name);
}

public class CommandTracingFilter(ConsoleAppFilter next) : ConsoleAppFilter(next)
{
    public override async Task InvokeAsync(ConsoleAppContext context, CancellationToken cancellationToken)
    {
        using var activity = ConsoleAppFrameworkSampleActivitySource.Instance.StartActivity("CommandStart");

        if (activity == null) // Telemtry is not listened
        {
            await Next.InvokeAsync(context, cancellationToken);
        }
        else
        {
            activity.SetTag("console_app.command_name", context.CommandName);
            activity.SetTag("console_app.command_args", string.Join(" ", context.EscapedArguments));

            try
            {
                await Next.InvokeAsync(context, cancellationToken);
                activity.SetStatus(ActivityStatusCode.Ok);
            }
            catch (Exception ex)
            {
                if (ex is OperationCanceledException)
                {
                    activity.SetStatus(ActivityStatusCode.Error, "Canceled");
                }
                else
                {
                    activity.AddException(ex);
                    activity.SetStatus(ActivityStatusCode.Error);
                }
                throw;
            }
        }
    }
}

// git clone https://github.com/SigNoz/signoz.git
// cd signoz/deploy/docker
// docker compose up
Environment.SetEnvironmentVariable("OTEL_EXPORTER_OTLP_ENDPOINT", "http://localhost:4317"); // 4317 or 4318

// crate builder from Microsoft.Extensions.Hosting.Host
var builder = Host.CreateApplicationBuilder(args);

builder.Logging.AddOpenTelemetry(logging =>
{
    logging.IncludeFormattedMessage = true;
    logging.IncludeScopes = true;
});

builder.Services.AddOpenTelemetry()
    .UseOtlpExporter()
    .ConfigureResource(resource =>
    {
        resource.AddService("ConsoleAppFramework Telemetry Sample");
    })
    .WithMetrics(metrics =>
    {
        // configure for metrics
        metrics.AddRuntimeInstrumentation()
            .AddHttpClientInstrumentation();
    })
    .WithTracing(tracing =>
    {
        // configure for tracing
        tracing.SetSampler(new AlwaysOnSampler())
            .AddHttpClientInstrumentation()
            .AddSource(ConsoleAppFrameworkSampleActivitySource.Name);
    })
    .WithLogging(logging =>
    {
        // configure for logging
    });

var app = builder.ToConsoleAppBuilder();

app.Add<SampleCommand>();

// setup filter
app.UseFilter<CommandTracingFilter>();

await app.RunAsync(args); // Run

public class SampleCommand(ILogger<SampleCommand> logger)
{
    [Command("")]
    public async Task Run(CancellationToken cancellationToken)
    {
        using var httpClient = new HttpClient();

        var ms = await httpClient.GetStringAsync("https://www.microsoft.com", cancellationToken);
        var google = await httpClient.GetStringAsync("https://www.google.com", cancellationToken);

        logger.LogInformation("Sequential Query done.");

        var ms2 = httpClient.GetStringAsync("https://www.microsoft.com", cancellationToken);
        var google2 = httpClient.GetStringAsync("https://www.google.com", cancellationToken);
        var apple2 = httpClient.GetStringAsync("https://www.apple.com", cancellationToken);
        await Task.WhenAll(ms2, google2, apple2);

        logger.LogInformation("Parallel Query done.");
    }
}

var app = ConsoleApp.Create();
await app.RunAsync(args, disposeServiceProvider: false); // default is true

var app = Host.CreateApplicationBuilder()
    .ToConsoleAppBuilder();

Cysharp/ConsoleAppFrameworkv5.7.6

Get Started

Readme

ConsoleAppFramework

Getting Started

Option aliases and Help, Version

Command

Nested command

Register from attribute

Performance of Commands

Disable Naming Conversion

Parse and Value Binding

Array

Object

GlobalOptions

Custom Value Converter

Double-dash escaping

Syntax Parsing Policy and Performance

CancellationToken(Gracefully Shutdown) and Timeout

Exit Code

Attribute based parameters validation

Hide command/parameter help

Filter(Middleware) Pipeline / ConsoleAppContext

Sharing Filters Between Projects

Performance of filter

Dependency Injection(Logging, Configuration, etc...)

OpenTelemetry

Prevent ServiceProvider auto dispose

Colorize

Publish to executable file

v4 -> v5 Migration Guide

License