feat: add pre and post command

internal/executor/cron.go

@@ -107,7 +107,9 @@ func (m *CronManager) AddTask(task CronTask) error {
 			return &ExecutionRequest{
 				TaskID:    taskID,
 				Name:      name,
-				Command:   cmd,
+				Command:     cmd,
+				PreCommand:  task.GetPreCommand(),
+				PostCommand: task.GetPostCommand(),
 				Type:      TaskTypeCron,
 				Timeout:   timeout,
 				WorkDir:   workDir,

internal/executor/executor.go

@@ -21,6 +21,8 @@ type Task interface {
 	GetID() string
 	GetName() string
 	GetCommand() string
+	GetPreCommand() string
+	GetPostCommand() string
 	GetTimeout() int
 	GetWorkDir() string
 	GetEnvs() string
@@ -40,8 +42,10 @@ type CronTask interface {
 
 // Request 任务执行请求
 type Request struct {
-	Command   string
-	WorkDir   string
+	Command     string
+	PreCommand  string
+	PostCommand string
+	WorkDir     string
 	Envs      []string
 	Timeout   int // 任务超时时间（分钟）
 	Languages []map[string]string
@@ -121,6 +125,19 @@ func ExecuteWithHooks(ctx context.Context, req Request, stdout, stderr io.Writer
 		req.UseMise = false
 	}
 
+	// 组合指令（如果存在前置或后置指令）
+	if req.PreCommand != "" || req.PostCommand != "" {
+		finalCmd := ""
+		if req.PreCommand != "" {
+			finalCmd += req.PreCommand + "\n"
+		}
+		finalCmd += req.Command
+		if req.PostCommand != "" {
+			finalCmd += "\n" + req.PostCommand
+		}
+		req.Command = finalCmd
+	}
+
 	// 1. 执行前钩子
 	var logID string
 	if hooks != nil {

internal/executor/scheduler.go

@@ -66,8 +66,10 @@ type ExecutionRequest struct {
 	LogID     string              // 日志 ID
 	Name      string              // 任务名称
 	Type      TaskType            // 任务类型
-	Command   string              // 命令
-	WorkDir   string              // 工作目录
+	Command     string              // 命令
+	PreCommand  string              // 前置命令
+	PostCommand string              // 后置命令
+	WorkDir     string              // 工作目录
 	Envs      []string            // 环境变量
 	Secrets   []string            // 需要脱敏的密码
 	Timeout   int                 // 超时时间（分钟）
@@ -204,7 +206,9 @@ func NewScheduler(config SchedulerConfig, handler SchedulerEventHandler) *Schedu
 		executor: func(ctx context.Context, req *ExecutionRequest, stdout, stderr io.Writer) (*Result, error) {
 			hooks := &schedulerHooksAdapter{handler: handler, req: req}
 			return ExecuteWithHooks(ctx, Request{
-				Command:   req.Command,
+				Command:     req.Command,
+				PreCommand:  req.PreCommand,
+				PostCommand: req.PostCommand,
 				WorkDir:   req.WorkDir,
 				Envs:      req.Envs,
 				Timeout:   req.Timeout,