added connection string to config

.env

@@ -6,3 +6,4 @@ S3_BUCKET=dev
 S3_DISABLE_SSL=true
 ADDRESS=:8080
 VERBOSE=true
+DB_CONNECTION=s3Browser:hunter2@/s3Browser

cmd/s3Browser.go

@@ -18,6 +18,7 @@ type args struct {
 	CacheTTL     int64  `arg:"--cache-ttl,env:CACHE_TTL" help:"Time in seconds" default:"30" placeholder:"TTL"`
 	CacheCleanup int64  `arg:"--cache-cleanup,env:CACHE_CLEANUP" help:"Time in seconds" default:"60" placeholder:"CLEANUP"`
 	Verbose      bool   `arg:"-v,--verbose,env:VERBOSE" help:"verbosity level" default:"false"`
+	DBConnection string `arg:"--db,required,env:DB_CONNECTION" help:"DSN in format: https://github.com/go-sql-driver/mysql#dsn-data-source-name"`
 }
 
 func (args) Version() string {
@@ -35,6 +36,7 @@ func main() {
 		S3AccessKey:  args.S3AccessKey,
 		S3SecretKey:  args.S3SecretKey,
 		S3Bucket:     args.S3Bucket,
+		DSN:          args.DBConnection,
 		CacheTTL:     time.Duration(args.CacheTTL) * time.Second,
 		CacheCleanup: time.Duration(args.CacheCleanup) * time.Second,
 		Address:      args.Address,

internal/db/db.go

@@ -19,18 +19,16 @@ type DB struct {
 	dbConn *sql.DB
 }
 
-func NewDB(driver, dataSourceName string) (*DB, error) {
-	db, err := sql.Open(driver, dataSourceName)
+func NewDB(dataSourceName string) (*DB, error) {
+	db, err := sql.Open("mysql", dataSourceName)
 
 	if err != nil {
 		return nil, err
 	}
 
-	if driver == "mysql" {
 	db.SetConnMaxLifetime(time.Minute * 3)
 	db.SetMaxOpenConns(10)
 	db.SetMaxIdleConns(10)
-	}
 
 	return &DB{
 		dbConn: db,

internal/s3Broswer.go

@@ -54,7 +54,7 @@ func Start(config types.AppConfig) {
 		return
 	}
 
-	dbStore, err := db.NewDB("mysql", "s3Browser:hunter2@/s3Browser")
+	dbStore, err := db.NewDB(config.DSN)
 	if err != nil {
 		log.Error("Failed to connect DB: ", err.Error())
 	}

internal/types/types.go

@@ -13,6 +13,7 @@ type AppConfig struct {
 	S3SecretKey  string
 	S3SSL        bool
 	S3Bucket     string
+	DSN          string
 	CacheTTL     time.Duration
 	CacheCleanup time.Duration
 	Address      string