Re: [Emacs-diffs] master 618310c: Work on `tramp-completion-mode-p'

[Dmitry Gutov]

On 26.02.2017 13:45, Michael Albinus wrote:

>   (progn (defun tramp-completion-mode-p ()
>     "Check, whether method / user name / host name completion is active."
>     (or
>      ;; Signal from outside.  `non-essential' has been introduced in Emacs 24.
>      (and (boundp 'non-essential) (symbol-value 'non-essential))
> -   tramp-completion-mode)))
> +   ;; This variable has been obsoleted in Emacs 26.
> +   tramp-completion-mode
> +   ;; Fallback.  Some completion packages still don't support
> +   ;; `non-essential' sufficiently.

Any packages in particular? Should we try working with their authors?

> +   (equal last-input-event 'tab))))

Not sure I understand what's going on here. It seems you are making 
`non-essential' being non-nil and `tab' being the last input event have 
the same impact.

Whereas, IME, the user pressing TAB usually means that the completion 
operation *is essential*, and they would probably be willing to input 
their connection credentials if necessary.

Like the discussion in https://debbugs.gnu.org/25607 has touched on.