url_shortener/internal/config/config.go

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2023-12-08 12:59:55 +02:00
package config
import (
"flag"
"log"
"os"
"time"
"github.com/ilyakaznacheev/cleanenv"
)
type Config struct {
Env string `yaml:"env" env-required:"true"`
StoragePath string `yaml:"storage_path" env-default:"./storage/storage.db"`
HTTPServer `yaml:"http_server"`
Admin `yaml:"admin"`
}
type Admin struct {
User string `yaml:"username" env-required:"true"`
Password string `yaml:"password" env:"HTTP_SERVER_PASSWORD" env-required:"true"`
}
type HTTPServer struct {
Address string `yaml:"address" env-default:"localhost:8080"`
Timeout time.Duration `yaml:"timeout" env-default:"4s"`
IdleTimeout time.Duration `yaml:"idle_timeout" env-default:"60s"`
}
func MustLoad() *Config {
// Get config path from env or flag
configPath := fetchConfigPath()
if configPath == "" {
log.Fatal("CONFIG_PATH is not set")
}
// check if file exists
if _, err := os.Stat(configPath); os.IsNotExist(err) {
log.Fatalf("config file does not exist: %s", configPath)
}
var cfg Config
// read config
if err := cleanenv.ReadConfig(configPath, &cfg); err != nil {
log.Fatalf("cannot read config: %s", err)
}
return &cfg
}
func fetchConfigPath() string {
var res string = os.Getenv("CONFIG_PATH")
if res == "" {
flag.StringVar(&res, "config", "", "path to config file")
flag.Parse()
}
return res
}