/// <summary>
/// .NET Core 3.0 disables IStartup and multiple Configure* entry points on Startup class requiring the use of a
/// clean ModularStartupActivator adapter class for implementing https://docs.servicestack.net/modular-startup
/// </summary>
public static IWebHostBuilder UseModularStartup <TStartup>(this IWebHostBuilder hostBuilder)
where TStartup : class
{
return(hostBuilder
// UserSecrets not loaded when using surrogate startup class, load explicitly from TStartup.Assembly
.ConfigureAppConfiguration((ctx, config) =>
config.AddUserSecrets(typeof(TStartup).GetTypeInfo().Assembly, optional: true))
.UseStartup(ModularStartup.Create <TStartup>()));
}
public ModularCreateStartup(IConfiguration configuration)
{
Configuration = configuration;
var ci = StartupType.GetConstructor(new[] { typeof(IConfiguration) });
if (ci != null)
{
instance = (ModularStartup)ci.Invoke(new[] { Configuration });
}
else
{
ci = StartupType.GetConstructor(Type.EmptyTypes);
if (ci != null)
{
instance = (ModularStartup)ci.Invoke(TypeConstants.EmptyObjectArray);
instance.Configuration = configuration;
}
else
{
throw new NotSupportedException($"{StartupType.Name} does not have a {StartupType.Name}(IConfiguration) constructor");
}
}
}
public static IWebHostBuilder UseModularStartup <TStartup>(this IWebHostBuilder hostBuilder)
where TStartup : class
{
return(hostBuilder.UseStartup(ModularStartup.Create <TStartup>()));
}