mxpv-podsync/pkg/config/config.go

package config

import (
	"strings"

	"github.com/spf13/viper"
)

const FileName = "podsync"

type AppConfig struct {
	YouTubeApiKey         string `yaml:"youtubeApiKey"`
	VimeoApiKey           string `yaml:"vimeoApiKey"`
	PatreonClientId       string `yaml:"patreonClientId"`
	PatreonSecret         string `yaml:"patreonSecret"`
	PostgresConnectionURL string `yaml:"postgresConnectionUrl"`
	RedisURL              string `yaml:"redisUrl"`
	CookieSecret          string `yaml:"cookieSecret"`
}

func ReadConfiguration() (cfg *AppConfig, err error) {
	viper.SetConfigName(FileName)

	// Configuration file
	viper.AddConfigPath(".")
	viper.AddConfigPath("/app/config/")

	// Env variables
	viper.AutomaticEnv()
	viper.SetEnvKeyReplacer(strings.NewReplacer(".", "_"))

	envmap := map[string]string{
		"youtubeApiKey":         "YOUTUBE_API_KEY",
		"vimeoApiKey":           "VIMEO_API_KEY",
		"patreonClientId":       "PATREON_CLIENT_ID",
		"patreonSecret":         "PATREON_SECRET",
		"postgresConnectionUrl": "POSTGRES_CONNECTION_URL",
		"redisUrl":              "REDIS_CONNECTION_URL",
		"cookieSecret":          "COOKIE_SECRET",
	}

	for k, v := range envmap {
		viper.BindEnv(k, v)
	}

	err = viper.ReadInConfig()
	if err != nil {
		if _, ok := err.(viper.ConfigFileNotFoundError); !ok {
			return
		}

		// Ignore file not found error
		err = nil
	}

	cfg = &AppConfig{}

	viper.Unmarshal(cfg)
	return
}