add a copy of postgresDsn that's exported

Signed-off-by: Yee Hing Tong <wild-endeavor@users.noreply.github.com>

database/postgres.go

@@ -49,6 +49,17 @@ func getPostgresDsn(ctx context.Context, pgConfig PostgresConfig) string {
 		pgConfig.Host, pgConfig.Port, pgConfig.DbName, pgConfig.User, password, pgConfig.ExtraOptions)
 }
 
+func PostgresDsn(ctx context.Context, pgConfig PostgresConfig) string {
+	password := resolvePassword(ctx, pgConfig.Password, pgConfig.PasswordPath)
+	if len(password) == 0 {
+		// The password-less case is included for development environments.
+		return fmt.Sprintf("host=%s port=%d dbname=%s user=%s sslmode=disable",
+			pgConfig.Host, pgConfig.Port, pgConfig.DbName, pgConfig.User)
+	}
+	return fmt.Sprintf("host=%s port=%d dbname=%s user=%s password=%s %s",
+		pgConfig.Host, pgConfig.Port, pgConfig.DbName, pgConfig.User, password, pgConfig.ExtraOptions)
+}
+
 // CreatePostgresDbIfNotExists creates DB if it doesn't exist for the passed in config
 func CreatePostgresDbIfNotExists(ctx context.Context, gormConfig *gorm.Config, pgConfig PostgresConfig) (*gorm.DB, error) {
 	dialector := postgres.Open(getPostgresDsn(ctx, pgConfig))