lucifer/internal/config/config.go

package config

import (
	"os"

	"gopkg.in/yaml.v2"
)

// Config is application configuration.
type Config struct {
	DB struct {
		FileName string `yaml:"file_name"`
	} `yaml:"db"`
}

// Load loads the first valid config file from the list of file paths.
func Load(filePaths ...string) (Config, error) {
	file, err := os.Open(filePaths[0])
	if err != nil {
		if len(filePaths) > 1 {
			return Load(filePaths[1:]...)
		}

		return Config{}, err
	}

	config := Config{}
	err = yaml.NewDecoder(file).Decode(&config)
	if err != nil {
		if len(filePaths) > 1 {
			return Load(filePaths[1:]...)
		}

		return Config{}, err
	}

	return config, nil
}