Optify

Optify is a Roslyn source generator that wires options pattern types into the generic host: mark a class or record with [OptifyOptions], call UseOptify() on your IHostBuilder, and each type will automatically be bound to configuration based on the type name or the SectionName attribute.

Installation

dotnet add package Optify

Recommended usage

Mark your configuration types with [OptifyOptions] so registration code is generated at compile time.

IMPORTANT: Types without [OptifyOptions] are not registered by UseOptify().

1. Mark options types

Apply [OptifyOptions] to types that represent configuration.

using Optify;

// Binds to section "MyAppSettings" by convention - matches class name.
[OptifyOptions]
public class MyAppSettings
{
    public string? ApiUrl { get; init; }
}

// Binds to section "ExternalServices" - specified by attribute.
[Optify(SectionName = "ExternalServices")]
public record EmailSettings
{
    public string? SmtpHost { get; init; }
}

2. Register with the host

Register every [OptifyOptions] type in the current assembly (recommended; registration is emitted as concrete calls—no reflection):

using Optify;

var host = Host.CreateDefaultBuilder(args)
    // ...
    .UseOptify()
    // ...
    .Build();

With ASP.NET Core minimal hosting, call it on WebApplicationBuilder.Host:

var builder = WebApplication.CreateBuilder(args);
builder.Host.UseOptify();

Alternatively: register a single type

Useful for testing scenarios when you don't want to register all types in the assembly.

// No [OptifyOptions] attribute required to register by convention.
public class MyAppSettings
{
    public string? ApiUrl { get; init; }
}

// Use attribute to specify a different section name.
[Optify(SectionName = "ExternalServices")]
public record EmailSettings
{
    public string? SmtpHost { get; init; }
}

var host = Host.CreateDefaultBuilder(args)
    // ...
    .UseOptify<MyAppSettings>()
    .UseOptify<EmailSettings>()
    // ...
    .Build();

Configuration layout

Match your appsettings.json (or other configuration sources) to the section names—either the type name or SectionName when you set it:

{
  "MyAppSettings": {
    "ApiUrl": "https://api.example.com"
  },
  "ExternalServices": {
    "SmtpHost": "smtp.example.com"
  }
}

License

This project is licensed under the MIT License—see LICENSE.md.