108 lines
2.3 KiB
Go
108 lines
2.3 KiB
Go
package config
|
|
|
|
import (
|
|
"context"
|
|
"flag"
|
|
"log"
|
|
"os"
|
|
"strconv"
|
|
|
|
"github.com/joho/godotenv"
|
|
)
|
|
|
|
const LOCAL_ENV = ".env.local"
|
|
|
|
type Nats struct {
|
|
Url string
|
|
Name string
|
|
VerifyCertificates bool
|
|
Ctx context.Context
|
|
}
|
|
|
|
type Mongo struct {
|
|
Uri string
|
|
Ctx context.Context
|
|
}
|
|
|
|
type Config struct {
|
|
Nats Nats
|
|
Mongo Mongo
|
|
ControllerId string
|
|
}
|
|
|
|
func NewConfig() *Config {
|
|
|
|
loadEnvVariables()
|
|
log.SetFlags(log.LstdFlags | log.Lshortfile)
|
|
|
|
natsUrl := flag.String("nats_url", lookupEnvOrString("NATS_URL", "nats://localhost:4222"), "url for nats server")
|
|
natsName := flag.String("nats_name", lookupEnvOrString("NATS_NAME", "adapter"), "name for nats client")
|
|
natsVerifyCertificates := flag.Bool("nats_verify_certificates", lookupEnvOrBool("NATS_VERIFY_CERTIFICATES", false), "verify validity of certificates from nats server")
|
|
mongoUri := flag.String("mongo_uri", lookupEnvOrString("MONGO_URI", "mongodb://localhost:27017"), "uri for mongodb server")
|
|
controllerId := flag.String("controller_id", lookupEnvOrString("CONTROLLER_ID", "oktopusController"), "usp controller endpoint id")
|
|
flHelp := flag.Bool("help", false, "Help")
|
|
|
|
/*
|
|
App variables priority:
|
|
1º - Flag through command line.
|
|
2º - Env variables.
|
|
3º - Default flag value.
|
|
*/
|
|
|
|
flag.Parse()
|
|
|
|
if *flHelp {
|
|
flag.Usage()
|
|
os.Exit(0)
|
|
}
|
|
|
|
ctx := context.TODO()
|
|
|
|
return &Config{
|
|
Nats: Nats{
|
|
Url: *natsUrl,
|
|
Name: *natsName,
|
|
VerifyCertificates: *natsVerifyCertificates,
|
|
Ctx: ctx,
|
|
},
|
|
Mongo: Mongo{
|
|
Uri: *mongoUri,
|
|
Ctx: ctx,
|
|
},
|
|
ControllerId: *controllerId,
|
|
}
|
|
}
|
|
|
|
func loadEnvVariables() {
|
|
err := godotenv.Load()
|
|
|
|
if _, err := os.Stat(LOCAL_ENV); err == nil {
|
|
_ = godotenv.Overload(LOCAL_ENV)
|
|
log.Printf("Loaded variables from '%s'", LOCAL_ENV)
|
|
}
|
|
|
|
if err != nil {
|
|
log.Println("Error to load environment variables:", err)
|
|
} else {
|
|
log.Println("Loaded variables from '.env'")
|
|
}
|
|
}
|
|
|
|
func lookupEnvOrString(key string, defaultVal string) string {
|
|
if val, _ := os.LookupEnv(key); val != "" {
|
|
return val
|
|
}
|
|
return defaultVal
|
|
}
|
|
|
|
func lookupEnvOrBool(key string, defaultVal bool) bool {
|
|
if val, _ := os.LookupEnv(key); val != "" {
|
|
v, err := strconv.ParseBool(val)
|
|
if err != nil {
|
|
log.Fatalf("LookupEnvOrBool[%s]: %v", key, err)
|
|
}
|
|
return v
|
|
}
|
|
return defaultVal
|
|
}
|