//go:build go1.16 && finder

// +build go1.16,finder

package viper

import (

	"fmt"

	"github.com/spf13/afero"

)

// Search all configPaths for any config file.

// Returns the first path that exists (and is a config file).

func (v *Viper) findConfigFile() (string, error) {

	finder := finder{

		paths:            v.configPaths,

		fileNames:        []string{v.configName},

		extensions:       SupportedExts,

		withoutExtension: v.configType != "",

	}

	file, err := finder.Find(afero.NewIOFS(v.fs))

	if err != nil {

		return "", err

	}

	if file == "" {

		return "", ConfigFileNotFoundError{v.configName, fmt.Sprintf("%s", v.configPaths)}

	}

	return file, nil

}