completion-auto-help not respected

[wyuenho]

The minibuffer has a custom option called completion-auto-help, which prevents the minibuffer help buffer from popping up when tabbing on an empty input. When ido-ubiquitous-mode is enabled.

Reproduction:

1. (setq icomplete-mode t)
2. (setq completion-auto-help nil)
3. (ido-ubiquitous-mode t)
4. M-x describe-function RET TAB
5. The minibuffer help buffer pops up.

Expectation:
No minibuffer help buffer pops up

[DarwinAwardWinner]

Can you tell me if the following works for you? If so, I'll incorporate a version of it into the next ido-cr+ release.

(define-advice ido-completion-help (:around (orig-fun &rest args) respect-completion-auto-help)
  "Don't show *Ido Completions* buffer when `completion-auto-help' is nil."
  (when completion-auto-help
    (apply orig-fun args)))

[DarwinAwardWinner]

Note that ido has its own setting, ido-cannot-complete-command, which you can set to ignore to achieve a similar effect. Ultimately, to the extent that this is a bug, it is a bug in ido itself. Hence, I've reported it to the Emacs bug tracker: https://debbugs.gnu.org/cgi/bugreport.cgi?bug=41340

[wyuenho]

That snippet doesn't work. The help buffer should still pop up after pressing ? when completion-auto-help is nil. There's also no reliable way to ignore appropriately because ido-completion-help is called interactively from ido-complete.

[DarwinAwardWinner]

Does setting ido-cannot-complete-command to ignore do what you want?

[wyuenho]

Yep that does it. Thanks!

[DarwinAwardWinner]

Closing this as it will be addressed in https://debbugs.gnu.org/cgi/bugreport.cgi?bug=41340