make gnus split only /var/spool/mail/USER

[hput <hputn3@zohomail.com>]

This is being resent... the previous attempt with headers as below
seems not to have reached the group.

,----
| From: hput <hputn3@zohomail.com>
| Subject: make gnus split only /var/spool/mail/USER
| Newsgroups: gmane.emacs.gnus.general
| Date: Sun, 21 Nov 2021 11:09:48 -0500 (1 week, 1 day, 10 hours ago)
| Message-ID: <8735nplcc3.fsf@local.lan>
`----

So a second attempt below:

First, sorry to blabber and wonder as below but finding it difficult to
say what I'm after briefly.

I've been using the following `sources' setup to have gnus deliver
mail from /var/spool/mail/USER and procmail created mbox style mail
/spool/in/ ... mbox style groups with *.in suffix

(setq mail-sources
      '((file :path "/var/spool/mail/reader")
        (directory :path "/spool/in/"
                   :suffix ".in")))

So procmail does the heavy work and gnus only delivers *.in mboxes to
similarly named nnml groups.

All good so far.

I'd like to have gnus split `file :path "/var/spool/mail/USER"'
but continue delivering the `name.in' mboxes as it now does.

I haven't been able to google up an example of such a thing.

I'm guessing it would be something like:

(setq mail-sources
      '((file :path "/var/spool/mail/USER"))
      SPLITTING code here .. connected to only
      `this mail-sources')
      
 Using larsi's example here but don't know how to connect it only to
 the mail-souces above :

(setq nnmail-split-methods
  '(("mail.cron" "^From:.*Cron Daemon")
    ("mail.NOTcron" "")))
    
But cut down for my use and connected to above `mail-sources'.
Or something like that. . . . .

-------       -------       ---=---       -------       ------- 

How to connect `mail-sources' and `nnmail-split-methods' above

But still have the delivery code below not be run thru splitting.

(setq mail-sources
      '((directory :path "/spool/in/"
                   :suffix ".in")))

      NO SPLITTING HERE