How can I get the prompt candidates to show on activation?

[Inc0n]

Currently, find-file, describe-symbol, theses commands that uses the prompt will not show the candidates straight away.

Instead, it requires one tab.

What can I do to get the prompt to show them on activation?
This one in particular I find very difficult to adjust to from the setup I have in emacs.

[vindarel]

Inside src/ext/prompt-window.lisp we see that Tab is bound to the prompt-completion command.

I tried to call it in create-prompt, but that is not sufficient;

I call it inside prompt-for-aux, in the middle, and TADAM it works!

(defun prompt-for-aux (&key (prompt-string (alexandria:required-argument :prompt-string))
                            (initial-string (alexandria:required-argument :initial-string))
                            (parameters (alexandria:required-argument :parameters))
                            (body-function (alexandria:required-argument :body-function))
                            (syntax-table nil)
                            (edit-callback nil)
                            (special-keymap nil))
  (when (frame-floating-prompt-window (current-frame))
    (editor-error "recursive use of prompt window"))
  (run-hooks *prompt-activate-hook*)
  (with-current-window (current-window)
    (let* ((prompt-window (create-prompt prompt-string
                                         initial-string
                                         parameters)))
      (switch-to-prompt-window prompt-window)

      (handler-case
          (with-unwind-setf (((frame-floating-prompt-window (current-frame))
                              prompt-window))

            (let ((*post-command-hook* *post-command-hook*))
                (when edit-callback
                  (add-hook *post-command-hook*
                            (lambda ()
                              (when (typep (this-command) 'lem:editable-advice)
                                (funcall edit-callback (get-input-string))))))

              ;; Simulate a first TAB, show the choices:
              (lem/prompt-window::prompt-completion) ;; <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<

                (with-special-keymap (special-keymap)
                  (if syntax-table
                      (with-current-syntax syntax-table
                        (funcall body-function))
                      (funcall body-function))))
            (lem/completion-mode:completion-end)
            (delete-prompt prompt-window)
            (run-hooks *prompt-deactivate-hook*))
        (execute-condition (e)
          (execute-input e))))))