feat: 增加命令行工具的参数支持，包括路径、干运行模式和输出目录选项

cmd/fmt.go

@@ -10,17 +10,20 @@ import (
 )
 
 func CommandFmt(root *cobra.Command) {
-	cmd := &cobra.Command{
-		Use:   "fmt",
-		Short: "fmt codes",
-		RunE:  commandFmtE,
-	}
+    cmd := &cobra.Command{
+        Use:   "fmt",
+        Short: "fmt codes",
+        RunE:  commandFmtE,
+    }
+
+    cmd.Flags().Bool("check", false, "Check formatting without writing changes")
+    cmd.Flags().String("path", ".", "Path to format (default .)")
 
 	root.AddCommand(cmd)
 }
 
 func commandFmtE(cmd *cobra.Command, args []string) error {
-	log.Info("开始格式化代码")
+    log.Info("开始格式化代码")
 	if _, err := exec.LookPath("gofumpt"); err != nil {
 		log.Info("gofumpt 不存在，正在安装...")
 		installCmd := exec.Command("go", "install", "mvdan.cc/gofumpt@latest")
@@ -34,14 +37,31 @@ func commandFmtE(cmd *cobra.Command, args []string) error {
 		}
 	}
 
-	log.Info("运行 gofumpt...")
-	gofumptCmd := exec.Command("gofumpt", "-l", "-extra", "-w", ".")
-	gofumptCmd.Stdout = os.Stdout
-	gofumptCmd.Stderr = os.Stderr
-	if err := gofumptCmd.Run(); err != nil {
-		return fmt.Errorf("运行 gofumpt 失败: %v", err)
-	}
+    check, _ := cmd.Flags().GetBool("check")
+    path, _ := cmd.Flags().GetString("path")
 
-	log.Info("格式化代码完成")
-	return nil
+    if check {
+        log.Info("运行 gofumpt 检查模式...")
+        out, err := exec.Command("gofumpt", "-l", "-extra", path).CombinedOutput()
+        if err != nil {
+            return fmt.Errorf("运行 gofumpt 失败: %v", err)
+        }
+        if len(out) > 0 {
+            fmt.Fprintln(os.Stdout, string(out))
+            return fmt.Errorf("发现未格式化文件，请运行: gofumpt -l -extra -w %s", path)
+        }
+        log.Info("代码格式良好")
+        return nil
+    }
+
+    log.Info("运行 gofumpt...")
+    gofumptCmd := exec.Command("gofumpt", "-l", "-extra", "-w", path)
+    gofumptCmd.Stdout = os.Stdout
+    gofumptCmd.Stderr = os.Stderr
+    if err := gofumptCmd.Run(); err != nil {
+        return fmt.Errorf("运行 gofumpt 失败: %v", err)
+    }
+
+    log.Info("格式化代码完成")
+    return nil
 }