bug#57673: [PATCH] Parse --help messages for pcomplete

[Lars Ingebrigtsen <larsi@gnus.org>]

Augusto Stoffel <arstoffel@gmail.com> writes:

> I've attached a patch to be applied (and squashed) on top of what I sent
> previously.  Let me know if this is inconvenient and I'll send the whole
> thing.

I'd prefer the whole thing in one patch.


[...]

> +               ("start"
> +                (pcomplete-here
> +                 (pcmpl-linux--systemd-units context "--state" "inactive,failed")))
> +               ((or "restart" "stop")
> +                (pcomplete-here
> +                 (pcmpl-linux--systemd-units context "--state" "active")))

But...  subcmd isn't used here in the new lines, either, so does that
really fix the warning?

> Hum, I don't know how to fix this.  The long line is the function
> signature, which is created mechanically by cl-defun and displays all
> the default values of the keyword arguments.
>
> The formatting is horrible:
>
>     (pcomplete-from-help COMMAND &rest ARGS &key (MARGIN (rx bol (+ " ")))
>     (ARGUMENT (rx "-" (+ (any "-" alnum)) (32 "="))) (METAVAR (rx (32 " ")
>     (or (+ (any alnum "_-")) (seq "[" (+? nonl) "]") (seq "<" (+? nonl)
>     ">") (seq "{" (+? nonl) "}")))) (SEPARATOR (rx ", " symbol-start))
>     (DESCRIPTION (rx (* nonl) (* "\n" (>= 9 " ") (* nonl)))) NARROW-START
>     NARROW-END)
>
> But the information is good to have, because you need to know what these
> regexps are in order to use the function.

Oh, yeah, that's pretty bad...  we should probably fix that in the
cl-defun macro, I guess, so this doesn't have to be fixed in this patch.