Add and fix goconst

.golangci.yaml

@@ -39,7 +39,6 @@ linters:
     - gocritic
     - forbidigo
     - dupl
-    - goconst
     - varnamelen
     - makezero
     - paralleltest

app.go

@@ -48,6 +48,8 @@ import (
 
 const (
 	AUTH_PREFIX = "Bearer "
+	POSTGRESQL  = "postgresql"
+	SQLITE      = "sqlite3"
 )
 
 // Config contains the initial Headscale configuration.
@@ -150,7 +152,7 @@ func NewHeadscale(cfg Config) (*Headscale, error) {
 
 	var dbString string
 	switch cfg.DBtype {
-	case "postgres":
+	case POSTGRESQL:
 		dbString = fmt.Sprintf(
 			"host=%s port=%d dbname=%s user=%s password=%s sslmode=disable",
 			cfg.DBhost,
@@ -159,7 +161,7 @@ func NewHeadscale(cfg Config) (*Headscale, error) {
 			cfg.DBuser,
 			cfg.DBpass,
 		)
-	case "sqlite3":
+	case SQLITE:
 		dbString = cfg.DBpath
 	default:
 		return nil, errors.New("unsupported DB")

db.go

@@ -24,7 +24,7 @@ func (h *Headscale) initDB() error {
 	}
 	h.db = db
 
-	if h.dbType == "postgres" {
+	if h.dbType == POSTGRESQL {
 		db.Exec("create extension if not exists \"uuid-ossp\";")
 	}
 	err = db.AutoMigrate(&Machine{})
@@ -66,12 +66,12 @@ func (h *Headscale) openDB() (*gorm.DB, error) {
 	}
 
 	switch h.dbType {
-	case "sqlite3":
+	case SQLITE:
 		db, err = gorm.Open(sqlite.Open(h.dbString), &gorm.Config{
 			DisableForeignKeyConstraintWhenMigrating: true,
 			Logger:                                   log,
 		})
-	case "postgres":
+	case POSTGRESQL:
 		db, err = gorm.Open(postgres.Open(h.dbString), &gorm.Config{
 			DisableForeignKeyConstraintWhenMigrating: true,
 			Logger:                                   log,