No job functions found running an F# function

[recumbent]

If I take the templated C# function, port the project to F# and attempt func start

I get:

Azure Functions Core Tools
Core Tools Version:       3.0.3388 Commit hash: fb42a4e0b7fdc85fbd0bcfc8d743ff7d509122ae
Function Runtime Version: 3.0.15371.0

[2021-03-23T09:53:46.162Z] No job functions found. Try making your job classes and methods public. If you're using binding extensions (e.g. Azure Storage, ServiceBus, Timers, etc.) make sure you've called the registration method for the extension(s) in your startup code (e.g. builder.AddAzureStorage(), builder.AddServiceBus(), builder.AddTimers(), etc.).
For detailed output, run func with --verbose flag.
[2021-03-23T09:53:51.196Z] Host lock lease acquired by instance ID '000000000000000000000000BD321FD0'.

I'm hoping that I just missed something obvious, but at this point its not clear what that might be.

The ported code is as below

HttpExample.fs:

namespace fsharp_isolated

open System.Collections.Generic;
open System.Net;
open Microsoft.Azure.Functions.Worker;
open Microsoft.Azure.Functions.Worker.Http;
open Microsoft.Extensions.Logging;

module HttpExample =

   [<Function("HttpExample")>]
   let Run ([<HttpTrigger(AuthorizationLevel.Anonymous, "get", "post")>] req : HttpRequestData , executionContext : FunctionContext ) : HttpResponseData =
        let logger = executionContext.GetLogger("HttpExample")
        logger.LogInformation("F# HTTP trigger function processed a request.")

        let response = req.CreateResponse(HttpStatusCode.OK)
        response.Headers.Add("Content-Type", "text/plain; charset=utf-8")

        response.WriteString("Welcome to Azure Functions!")

Program.fs:

namespace fsharp_isolated

open System.Threading.Tasks;
open Microsoft.Extensions.Configuration;
open Microsoft.Extensions.Hosting;
open Microsoft.Azure.Functions.Worker.Configuration;

module Program =
    [<EntryPoint>]
    let main _ =
        let hostBuilder = new HostBuilder()
        hostBuilder.ConfigureFunctionsWorkerDefaults() |> ignore

        let host = hostBuilder.Build()
        host.Run()

        0

The full project is here: https://github.com/recumbent/fsharp-isolated

[recumbent]

Further to the above, @marklam found that if one makes the changes below to the .fsproj then it will find the function and work with func start

• <None Update="host.json"> to <None Include="host.json">
• <None Update="local.settings.json"> to <None Include="local.settings.json">

i.e. change Update to Include in both cases

[fabiocav]

@recumbent thank you for the update.

We'll be working on some F# templates, so hopefully that will address those types of issues.

/cc @anthonychu