Strangler Fig Generator

[GenerateStranglerFig] creates a typed StranglerFig<TRequest, TResponse> factory from route predicates and one handler for each side of the migration.

[GenerateStranglerFig(typeof(CheckoutMigrationRequest), typeof(CheckoutMigrationResponse), MigrationName = "checkout-strangler")]
public static partial class CheckoutMigration
{
    [StranglerFigRoute("enterprise-tenant")]
    private static bool IsEnterprise(CheckoutMigrationRequest request) => request.TenantId.StartsWith("enterprise-");

    [StranglerFigLegacy]
    private static CheckoutMigrationResponse Legacy(CheckoutMigrationRequest request) => LegacySystem.Submit(request);

    [StranglerFigModern]
    private static CheckoutMigrationResponse Modern(CheckoutMigrationRequest request) => ModernSystem.Submit(request);
}

Diagnostics:

PKSF001: host type must be partial.
PKSF002: at least one route, exactly one legacy handler, and exactly one modern handler are required.
PKSF003: route or handler signature is invalid.
PKSF004: route names must be unique.

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Strangler Fig Generator