How can I deploy a Cloud Function Gen1 and Gen2 function from the same codebase?

I'm trying to deploy a Gen1 and Gen2 Cloud Function from the same codebase. (Because firebase auth events are only supported in Gen1).

The deploy works fine if I deploy 1 or the other, but if I add the 2 together, an error is throw: Function failed to start: no matching function found with name: "MyGen1Func"

This is my functions.go root file:

package functions

import (
    "context"
    "net/http"
	"github.com/GoogleCloudPlatform/functions-framework-go/functions"
)

type Event struct {
  // ...
}

func MyGen1Func(ctx context.Context, data Event) error {
  // ...
}

func init() {
	functions.HTTP("MyGen2Func", func (w http.ResponseWriter, req *http.Request) {
      // ...
    })

}

And this is (mostly) how they're deployed in cloudbuild:

gcloud functions deploy MyGen1Func \
     --runtime go120 \
     --source ./ \
     --trigger-event providers/firebase.auth/eventTypes/user.create \
     --entry-point MyGen1Func


gcloud functions deploy MyGen2Func \
     --gen2 \
     --runtime go120 \
     --source ./ \
     --trigger-http \
     --allow-unauthenticated

Thanks!

Turns out you can just export both gen1 and gen2 functions from the root package and add an environment variable when deploying the gen2 function to mark the entry point:

--set-env-vars FUNCTION_TARGET=MyGen2Func

package functions

import (
    "context"
    "net/http"
)

func MyGen1Func(ctx context.Context, data Event) error {
  // ...
}

func MyGen2Func(w http.ResponseWriter, req *http.Request) {
  // ...
}