flake

internal/config/config.go

@@ -33,7 +33,7 @@ type Bybit struct {
 type Postgresql struct {
 	Address  string `yaml:"address" env-required:"true"`
 	User     string `yaml:"user" env-required:"true"`
-	Password string `yaml:"password" env-required:"true"`
+	Password string `yaml:"password" env-default:""`  // empty for peer auth over Unix socket
 	DBName   string `yaml:"db_name" env-required:"true"`
 }
 

internal/repository/postgresql/postgresql.go

@@ -6,6 +6,7 @@ import (
 	"errors"
 	"fmt"
 	"log/slog"
+	"strings"
 
 	"gitea.computernetthings.ru/yash/crypto_alert_bot/internal/config"
 	"gitea.computernetthings.ru/yash/crypto_alert_bot/internal/repository/postgresql/migrations"
@@ -22,8 +23,18 @@ type Postgresql struct {
 	db *pgxpool.Pool
 }
 
+// dsn builds a connection string that supports both TCP (host:port) and Unix
+// socket (path starting with "/") addresses. Unix socket mode skips the
+// password and uses OS peer authentication instead.
+func dsn(cfg *config.Postgresql) string {
+	if strings.HasPrefix(cfg.Address, "/") {
+		return fmt.Sprintf("host=%s user=%s dbname=%s sslmode=disable", cfg.Address, cfg.User, cfg.DBName)
+	}
+	return fmt.Sprintf("postgres://%s:%s@%s/%s?sslmode=disable", cfg.User, cfg.Password, cfg.Address, cfg.DBName)
+}
+
 func New(ctx context.Context, log *slog.Logger, cfg *config.Postgresql) (*Postgresql, error) {
-	pool, err := pgxpool.New(ctx, fmt.Sprintf("postgres://%s:%s@%s/%s?sslmode=disable", cfg.User, cfg.Password, cfg.Address, cfg.DBName))
+	pool, err := pgxpool.New(ctx, dsn(cfg))
 	if err != nil {
 		return nil, fmt.Errorf("failed to connect to postgres: %w", err)
 	}
@@ -41,9 +52,7 @@ func New(ctx context.Context, log *slog.Logger, cfg *config.Postgresql) (*Postgr
 }
 
 func applyMigrations(cfg *config.Postgresql, log *slog.Logger) error {
-	dsn := fmt.Sprintf("postgres://%s:%s@%s/%s?sslmode=disable", cfg.User, cfg.Password, cfg.Address, cfg.DBName)
-
-	sqlDB, err := sql.Open("pgx", dsn)
+	sqlDB, err := sql.Open("pgx", dsn(cfg))
 	if err != nil {
 		return fmt.Errorf("failed to open sql db for migrations: %w", err)
 	}