scott-the-programmer/terraform-provider-minikube

package state_utils

import (
    "sort"

    "github.com/hashicorp/terraform-plugin-sdk/v2/helper/schema"
)

func SliceOrNil[T any](slice []T) []T {
    if len(slice) == 0 {
        return nil
    }
    return slice
}

func ReadSliceState(slice interface{}) []string {
    var stringSlice []string

    switch sl := slice.(type) {
    default:
        return []string{}
    case []string:
        stringSlice = slice.([]string)
    case *schema.Set:
        stringSlice = make([]string, sl.Len())
        objSlice := sl.List()
        for i, v := range objSlice {
            stringSlice[i] = v.(string)
        }
    case []interface{}:
        stringSlice = make([]string, len(sl))
        for i, v := range sl {
            stringSlice[i] = v.(string)
        }
    }

    sort.Strings(stringSlice) //to ensure consistency with TF state

    return stringSlice
}