Add ConfigureFunctionsWebApplication extension allowing to pass configure action

[adrianfrankowski95]

Description

Currently F# ignores Extension Startups that are generated (issue #1246) and as a workaround it must be configured manually.

It is easily doable for classic IHostBuilder, because its extension allows to pass configure action:

azure-functions-dotnet-worker/extensions/Worker.Extensions.Http.AspNetCore/src/FunctionsHostBuilderExtensions.cs

Line 37 in cfb4d9c

public static IHostBuilder ConfigureFunctionsWebApplication(this IHostBuilder builder, Action<IFunctionsWorkerApplicationBuilder> configureWorker)

But this is not possible for the new preferred IHostApplicationBuilder as the only extension method does not allow to pass configure action:

azure-functions-dotnet-worker/extensions/Worker.Extensions.Http.AspNetCore/src/FunctionsApplicationBuilderAspNetCoreExtensions.cs

Line 18 in cfb4d9c

public static FunctionsApplicationBuilder ConfigureFunctionsWebApplication(this FunctionsApplicationBuilder builder)

It makes .NET Aspire harder to use, because its entire ServiceDefaults rely on IHostApplicationBuilder and it requires either custom implementation or below hack to access internal HostBuilder property:

let builder = FunctionsApplication.CreateBuilder(args)

let hostBuilder =
    builder
        .GetType()
        .GetProperty(
            "HostBuilder",
            System.Reflection.BindingFlags.NonPublic
            ||| System.Reflection.BindingFlags.Instance
        )
        .GetValue(builder, null)
    :?> IHostBuilder

hostBuilder.ConfigureFunctionsWebApplication(fun app -> ServiceBusExtensionStartup().Configure(app))

// .NET Aspire defaults
builder.AddServiceDefaults()

builder.Build().Run()

[jviau]

AdrianFrankowski (@adrianfrankowski95) FunctionsApplicationBuilder implements IFunctionsWorkerApplicationBuilder. Is there any reason you can't pass it directly into the ServiceBusExtensionStartup().Configure(....) call?

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This issue has been automatically marked as stale because it has been marked as requiring author feedback but has not had any activity for 4 days. It will be closed if no further activity occurs within 3 days of this comment.

If you are not the original author (AdrianFrankowski (@adrianfrankowski95)) and believe this issue is not stale, please comment with /bot not-stale and I will not close it.

[microsoft-github-policy-service]

This issue has been automatically marked as stale because it has been marked as requiring author feedback but has not had any activity for 4 days. It will be closed if no further activity occurs within 3 days of this comment.