Using tea.Printf before tea.Quit

[asdine]

it is quite difficult to use the tea.Printf and tea.Println functions right before tea.Quit.
When using it with tea.Batch and tea.Quit for example, there is a race between tea.Printf and tea.Quit.

Example:

// in this example, we are dealing with a list of tasks,
// display the latest state then start the next task.

  case foo:
     m.current++
     // if there is still work to do
     return m, tea.Batch( // this works fine
       tea.Println(m.tasks[m.current-1].View()),
       m.tasks[m.current].Update(),
     )
     // ...
     // Last element of the list, print it and leave the program
     return m, tea.Batch( // this doesn't work, race between Println and Quit
       tea.Println(m.tasks[m.current-1].View()),
       tea.Quit,
     )

By design tea.Batch doesn't provide any ordering guarantees, however its use with tea.Printf and tea.Quit makes it difficult to display all messages before quitting the program.

(If I understand correctly, the tea.Print* example has the same issue, although it misses the first entry in the list (it's more visible if you deactivate the randomness of the packages function))

I tried with tea.Sequentially but it returns the first non-nil message, this ignores the tea.Quit message.

Ideally I would like to use tea.Printf, then once it's rendered, use tea.Quit. Example:

  return m, tea.QuitAfter(tea.Printf("...."))

What is the proper way of using tea.Printf and then tea.Quit?

[meowgorithm]

This is a really good catch and, unfortunately, there's no solution yet. It may actually be possible to adjust tea.Sequentially internally so that it works commands that return non-nil messages. If that doesn't work I'll return with some other possible solutions.

[meowgorithm]

Alright, so it still needs to be vetted, but I just pushed a sequence branch which introduces the Sequence command that allows you to run commands in order.

cmd := tea.Sequence(tea.Println("A"), tea.Println("B"), tea.Println("C"), tea.Quit)

Full example here. Would love hear what you think.

[asdine]

It works great! I managed to run tea.Println and tea.Quit sequentially with no issue.