Re: Missing entries for Perl in etags-regen-file-extensions -- okay for emacs-30?

[Eli Zaretskii]

> From: Sean Whitton <spwhitton@spwhitton.name>
> Date: Fri, 20 Sep 2024 10:15:50 +0100
> 
> Hello,
> 
> Can I install this simple change on the release branch, please?
> 
> -- >8 --
> ---
>  lisp/progmodes/etags-regen.el | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/lisp/progmodes/etags-regen.el b/lisp/progmodes/etags-regen.el
> index 21ea9bfb8b3..e97b0cd7574 100644
> --- a/lisp/progmodes/etags-regen.el
> +++ b/lisp/progmodes/etags-regen.el
> @@ -119,7 +119,7 @@ etags-regen-regexp-alist
>  ;; http://lists.gnu.org/archive/html/emacs-devel/2018-01/msg00323.html
>  (defcustom etags-regen-file-extensions
>    '("rb" "js" "py" "pl" "el" "c" "cpp" "cc" "h" "hh" "hpp"
> -    "java" "go" "cl" "lisp" "prolog" "php" "erl" "hrl"
> +    "java" "go" "cl" "lisp" "prolog" "php" "erl" "hrl" "pl" "pm"
>      "F" "f" "f90" "for" "cs" "a" "asm" "ads" "adb" "ada")
>    "Code file extensions for `etags-regen-mode'.

We already have "pl" in the list.  Adding "pm" is okay, but then why
only it? why not add all the extensions that 'etags' supports?

Dmitry, why do we need an explicit list instead of asking 'etags'
which extensions it supports?