new-server/app/config/env.go

package config

import (
	"os"
	"strconv"
)

var MySqlHost = strEnv("LUCIFER_MYSQL_HOST")
var MySqlPort = intEnv("LUCIFER_MYSQL_PORT")
var MySqlUsername = strEnv("LUCIFER_MYSQL_USERNAME")
var MySQlPassword = strEnv("LUCIFER_MYSQL_PASSWORD")

var ServerPort = intEnv("LUCIFER_SERVER_PORT")

func strEnv(key string) string {
	env, ok := os.LookupEnv(key)
	if !ok {
		panic("missing environment variable: " + key)
	}

	return env
}

func intEnv(key string) int {
	val, err := strconv.Atoi(strEnv(key))
	if err != nil {
		panic("invalid environment variable: " + key)
	}

	return val
}