Variable used to detect reply prefixes in Subject

Variable used to detect reply prefixes in Subject

[Jonas Bernoulli]

Hello,

Please tell me what variable I have to customize to recognize additional
unusual prefixes that some people add to the subject when they send a
reply.

I searched using some strings I would expect to appear in the value of
that variable but either got no results or way too many.

     Thanks!
     Jonas


Ps: Since (I assume) many notmuch users also frequent emacs-devel,
    where a frequent commentator uses the prefix "RE: [External] : ",
    maybe notmuch could even recognize that by default? (I asked him
    to consider not doing that anymore, but even if he agrees, that
    would not affect his numerous past replies.)

Re: Variable used to detect reply prefixes in Subject

[Teemu Likonen]

[-- Attachment #1.1: Type: text/plain, Size: 1539 bytes --]

* 2022-01-23 15:13:18+0100, Jonas Bernoulli wrote:

> Please tell me what variable I have to customize to recognize
> additional unusual prefixes that some people add to the subject when
> they send a reply.

There is message-subject-re-regexp. 

> Ps: Since (I assume) many notmuch users also frequent emacs-devel,
>     where a frequent commentator uses the prefix "RE: [External] : ",
>     maybe notmuch could even recognize that by default? (I asked him
>     to consider not doing that anymore, but even if he agrees, that
>     would not affect his numerous past replies.)

Yes. That is annoying. I have written a custom Subject cleaner for my
replies:


(add-hook 'message-setup-hook 'my-message-subject-clean)

(defun my-message-subject-clean ()
  ;; Delete first \( ... \) group from Subject header.
  (my-with-message-headers
    (let ((case-fold-search nil))
      (dolist (re '(".*\\(\\[ ?SPAM\\(?: UNSURE\\|\\?\\)? ?\\] \\(?:Re: \\)?\\)"
                    ".*\\(\\(?:Re: \\)* *\\[External\\][ :]*\\(?:Re: *\\)*\\)"))
        (goto-char (point-min))
        (when (re-search-forward (concat "^Subject: " re) nil t)
          (delete-region (match-beginning 1) (match-end 1)))))))

(defmacro my-with-message-headers (&rest body)
  (declare (indent 0))
  `(save-excursion
     (save-restriction
       (save-match-data
         (message-narrow-to-head)
         ,@body))))

-- 
/// Teemu Likonen - .-.. https://www.iki.fi/tlikonen/
// OpenPGP: 6965F03973F0D4CA22B9410F0F2CAE0E07608462

[-- Attachment #1.2: signature.asc --]
[-- Type: application/pgp-signature, Size: 434 bytes --]

[-- Attachment #2: Type: text/plain, Size: 0 bytes --]

Re: Variable used to detect reply prefixes in Subject

[David Bremner]

Jonas Bernoulli <jonas@bernoul.li> writes:

> Hello,
>
> Please tell me what variable I have to customize to recognize additional
> unusual prefixes that some people add to the subject when they send a
> reply.
>
> I searched using some strings I would expect to appear in the value of
> that variable but either got no results or way too many.

There is some simple (-minded?) processing in notmuch-reply.c, which
just adds Re: to the front of the subject if it is not already present.

The original headers are also returned, so in principle the emacs front
end could do something smarter.

d