bug#31057: 27.0.50; Gnus: Make configurable what to show when selecting a group

[Michael Heerdegen]

Hello,

It would be nice if there was a way to influence which articles are
shown when selecting a group in Gnus.  I recently discovered the Gnus
registry.  It would be cool if I could change the set of shown articles
based on the data in the registry (custom marks, for example).  I think
it could be something as simple as
`gnus-alter-articles-to-read-function', a variable bound to a function
that one can set or advice.


Thanks,

Michael.


In GNU Emacs 27.0.50 (build 11, x86_64-pc-linux-gnu, GTK+ Version 3.22.29)
 of 2018-04-02 built on drachen
Repository revision: a8ea7cd40faa41e4ee6f862c8f685d53c6d390af
Windowing system distributor 'The X.Org Foundation', version 11.0.11906000
System Description: Debian GNU/Linux buster/sid

Recent messages:
Auto-saving...done
Auto-saving...done
Mark set
Auto-saving...done
Saving file /home/micha/Treasure/today/random-notes.txt...
Wrote /home/micha/Treasure/today/random-notes.txt
Auto-saving...done
Saving file /home/micha/Treasure/today/random-notes.txt...
Wrote /home/micha/Treasure/today/random-notes.txt
Making completion list... [17 times]

Configured features:
XPM JPEG TIFF GIF PNG RSVG IMAGEMAGICK SOUND DBUS GSETTINGS NOTIFY
GNUTLS LIBXML2 FREETYPE XFT ZLIB TOOLKIT_SCROLL_BARS GTK3 X11 THREADS
JSON LCMS2

Important settings:
  value of $LC_ALL: de_DE.utf8
  value of $LC_COLLATE: C
  value of $LC_TIME: C
  value of $LANG: de_DE.utf8
  locale-coding-system: utf-8-unix

Major mode: Emacs-Lisp

Minor modes in effect:
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  highlight-defined-mode: t
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  diff-auto-refine-mode: t
  smart-yank-mode: t
  recentf-mode: t
  savehist-mode: t
  which-function-mode: t
  winner-mode: t
  show-paren-mode: t
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  auto-compression-mode: t
  column-number-mode: t
  line-number-mode: t
  auto-fill-function: my-prog-do-auto-fill

Load-path shadows:
/home/micha/gnu-emacs/elisp/linkd hides /home/micha/gnu-emacs/elisp/linkd/linkd
/home/micha/gnu-emacs/elisp/my-stuff/on-screen hides 
/home/micha/gnu-emacs/elisp/my-stuff/on-screen.el/on-screen
/home/micha/gnu-emacs/elisp/my-stuff/on-screen hides 
/home/micha/gnu-emacs/elisp/my-stuff/on-screen/on-screen
/home/micha/gnu-emacs/elisp/helm-swoop/helm-swoop hides 
/home/micha/.emacs.d/elpa/helm-swoop-20180215.354/helm-swoop
/home/micha/gnu-emacs/elisp/my-stuff/helm-backup/features/support/env hides 
/usr/local/share/emacs/27.0.50/lisp/env
/home/micha/.emacs.d/elpa/tabulated-list-20120406.1351/tabulated-list hides 
/usr/local/share/emacs/27.0.50/lisp/emacs-lisp/tabulated-list

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Memory information:
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 (symbols 48 62697 3)
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 (strings 32 332364 10496)
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