Method Cancel

tools/bash/background.go:181–206

(taskID string)

	}
	done := make(chan struct{})
	cmd := exec.CommandContext(ctx, argv[0], argv[1:]...)
	if cwd == "" {
		cwd = "."
	}
	cmd.Dir = cwd
	prepareProcessGroup(cmd)
	m.mu.Lock()
	m.running[taskID] = &RunningTask{
		Cmd:    cmd,
		Cancel: cancel,
		Done:   done,
	}
	m.mu.Unlock()
	go m.runTask(ctx, task, cmd, cancel, done, timeoutValue, hasTimeout)
	return task, nil
}

func (m *BackgroundManager) Cancel(taskID string) bool {
	m.mu.Lock()
	task := m.tasks[taskID]
	running := m.running[taskID]
	if task == nil || task.Status != "running" || running == nil {
		m.mu.Unlock()
		return false
	}
	task.Status = "cancelled"
	task.EndTime = float64Ptr(nowSeconds())
	m.mu.Unlock()
	terminateProcessTree(running.Cmd)