new-server/app/config/env.go

package config

import (
	"os"
	"strconv"
)

func MySqlHost() string     { return strEnv("LUCIFER_MYSQL_HOST") }
func MySqlPort() int        { return intEnv("LUCIFER_MYSQL_PORT") }
func MySqlSchema() string   { return strEnv("LUCIFER_MYSQL_SCHEMA") }
func MySqlUsername() string { return strEnv("LUCIFER_MYSQL_USERNAME") }
func MySQlPassword() string { return strEnv("LUCIFER_MYSQL_PASSWORD") }

func ServerPort() int       { return 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
}