Open
Description
Describe the bug
I have a configuration struct with has a field with type interface fs.FS.
Users can input file path as string and with a custom decode function, the string is translated into os.DirFS
If the users does not specific a value, the default embed.FS value be used. However after decode the config into a struct, the embed.FS is empty.
To Reproduce
Go code to reproduce
package main
import (
"embed"
"fmt"
"io/fs"
"github.com/knadh/koanf/providers/structs"
"github.com/knadh/koanf/v2"
)
//go:embed *
var testFile embed.FS
type Config struct {
FS fs.FS `koanf:"dir"`
}
var Defaults = Config{
FS: testFile,
}
func main() {
k := koanf.New(".")
if err := k.Load(structs.Provider(Defaults, "koanf"), nil); err != nil {
fmt.Println("Error loading defaults:", err)
return
}
var conf Config
if err := k.Unmarshal("", &conf); err != nil {
fmt.Println("Error unmarshalling:", err)
return
}
fmt.Println("Config loaded successfully.")
fmt.Printf("FS: %+v\n", conf.FS)
fmt.Printf("FS: %+v\n", Defaults.FS)
}Expected behavior
If a user does not enter a value, the default value should be given.
Please provide the following information):
- OS: OSX
- Koanf Version [e.g. v1.0.0]
github.com/go-viper/mapstructure/v2 v2.2.1
github.com/knadh/koanf/parsers/yaml v1.0.0
github.com/knadh/koanf/providers/basicflag v1.1.0
github.com/knadh/koanf/providers/env v1.1.0
github.com/knadh/koanf/providers/file v1.2.0
github.com/knadh/koanf/providers/structs v1.0.0
github.com/knadh/koanf/v2 v2.2.0
Additional context
I guess the issue is somewhere in ko.Get(path). My assumten is that somewhat from github.com/mitchellh/copystructure can't copy the struct, since the field is not exported.
Here is a screenshot from debugger: