sync: migrate ai-operator to Gitea (2026-08-10)

internal/db/pool.go

@@ -0,0 +1,31 @@
+package db
+
+import (
+	"context"
+	"fmt"
+
+	"ai-operator/internal/config"
+	"github.com/jackc/pgx/v5/pgxpool"
+)
+
+func OpenPool(ctx context.Context, cfg config.DatabaseConfig) (*pgxpool.Pool, error) {
+	if cfg.URL == "" {
+		return nil, fmt.Errorf("DATABASE_URL is required")
+	}
+	pc, err := pgxpool.ParseConfig(cfg.URL)
+	if err != nil {
+		return nil, fmt.Errorf("parse database url: %w", err)
+	}
+	pc.MaxConns = int32(cfg.MaxOpenConns)
+	pc.MinConns = 0
+	pc.MaxConnLifetime = cfg.ConnMaxLifetime
+	pool, err := pgxpool.NewWithConfig(ctx, pc)
+	if err != nil {
+		return nil, fmt.Errorf("open db pool: %w", err)
+	}
+	if err := pool.Ping(ctx); err != nil {
+		pool.Close()
+		return nil, fmt.Errorf("db ping: %w", err)
+	}
+	return pool, nil
+}