feat: transaction implement

internal/logging/logger.go

@@ -0,0 +1,52 @@
+package logging
+
+import (
+	"errors"
+	"fmt"
+	"io"
+	"log/slog"
+	"os"
+	"path/filepath"
+)
+
+// New 创建同时写入 stdout 和本地文件的结构化文本日志。
+// stdout 由 systemd/journald 收集，本地文件用于现场诊断和受控远程读取。
+func New(filePath string) (*slog.Logger, io.Closer, error) {
+	return NewWithConsole(os.Stdout, filePath)
+}
+
+// NewWithConsole 允许调用方指定控制台 writer，主要用于测试和嵌入运行。
+func NewWithConsole(console io.Writer, filePath string) (*slog.Logger, io.Closer, error) {
+	if console == nil {
+		return nil, nil, errors.New("console writer is required")
+	}
+	if filePath == "" {
+		return nil, nil, errors.New("log file path is required")
+	}
+	absPath, err := filepath.Abs(filePath)
+	if err != nil {
+		return nil, nil, fmt.Errorf("resolve log file path: %w", err)
+	}
+	if err := os.MkdirAll(filepath.Dir(absPath), 0o750); err != nil {
+		return nil, nil, fmt.Errorf("create log directory: %w", err)
+	}
+	file, err := os.OpenFile(absPath, os.O_CREATE|os.O_APPEND|os.O_WRONLY, 0o640)
+	if err != nil {
+		return nil, nil, fmt.Errorf("open log file: %w", err)
+	}
+	handler := slog.NewTextHandler(io.MultiWriter(console, file), &slog.HandlerOptions{Level: slog.LevelInfo})
+	return slog.New(handler), &syncFileCloser{file: file}, nil
+}
+
+type syncFileCloser struct {
+	file *os.File
+}
+
+func (c *syncFileCloser) Close() error {
+	if c == nil || c.file == nil {
+		return nil
+	}
+	file := c.file
+	c.file = nil
+	return errors.Join(file.Sync(), file.Close())
+}

internal/logging/logger_test.go

@@ -0,0 +1,35 @@
+package logging
+
+import (
+	"bytes"
+	"os"
+	"path/filepath"
+	"strings"
+	"testing"
+)
+
+func TestLoggerWritesConsoleAndFile(t *testing.T) {
+	t.Parallel()
+	var console bytes.Buffer
+	path := filepath.Join(t.TempDir(), "daemon.log")
+	logger, closer, err := NewWithConsole(&console, path)
+	if err != nil {
+		t.Fatalf("create logger: %v", err)
+	}
+	logger.Info("transaction created", "transaction_id", "transaction-1")
+	if err := closer.Close(); err != nil {
+		t.Fatalf("close logger: %v", err)
+	}
+	fileContent, err := os.ReadFile(path)
+	if err != nil {
+		t.Fatalf("read log file: %v", err)
+	}
+	for name, content := range map[string]string{
+		"console": console.String(),
+		"file":    string(fileContent),
+	} {
+		if !strings.Contains(content, "transaction created") || !strings.Contains(content, "transaction_id=transaction-1") {
+			t.Fatalf("%s log is missing fields: %q", name, content)
+		}
+	}
+}