bug#51969: 29.0.50; Add command for refilling ERC buffers

[J.P.]

Tags: patch

A recent bug entitled

  bug#51841: 27.2; erc-insert-marker has no value

(opened by Libera user Bost) was in part brought about by confusion over
whether ERC already offered this feature and perhaps applied it during
major-mode setup. While I don't think erc-stamp and erc-fill currently
provide sufficient support to rig up automated refilling in a reliable
way (on window configuration change, for example), I agree that some
means of doing so manually might occasionally come in handy.

A related issue concerns the purpose and treatment of the option
`erc-fill-prefix'. This one's a mystery to me and seems to have little
meaningful bearing on anything. It does make an appearance in
erc-button.el, but to what end I'm not entirely certain. Like a few
other puzzlers, it was present in much the same form back when ERC was
first ported to ye old CVS some twenty years ago (almost to the day)
[1]. Anyway, I will continue to investigate this. Thanks.


[1] 
https://gitlab.com/jpneverwas/og-erc/-/commit/9a819366bdf8a6f5a304916baa2d6a501eb3987b#4042b2fc4c564fbd556343d1ed666da630f85951_0_97

In GNU Emacs 29.0.50 (build 1, x86_64-redhat-linux-gnu, GTK+ Version 3.24.30, 
cairo version 1.17.4)
 of 2021-11-18 built on localhost
Repository revision: 69f1bc43c026049ed2aab6a6368e2e9a5406b779
Repository branch: master
Windowing system distributor 'The X.Org Foundation', version 11.0.12011000
System Description: Fedora 34 (Workstation Edition)

Configured using:
 'configure --enable-check-lisp-object-type --enable-checking=yes,glyphs
 --build=x86_64-redhat-linux-gnu --host=x86_64-redhat-linux-gnu
 --program-prefix= --prefix=/usr --exec-prefix=/usr --bindir=/usr/bin
 --sbindir=/usr/sbin --sysconfdir=/etc --datadir=/usr/share
 --includedir=/usr/include --libdir=/usr/lib64 --libexecdir=/usr/libexec
 --localstatedir=/var --sharedstatedir=/var/lib --mandir=/usr/share/man
 --infodir=/usr/share/info --with-dbus --with-gif --with-jpeg --with-png
 --with-rsvg --with-tiff --with-xft --with-xpm --with-x-toolkit=gtk3
 --with-gpm=no --with-xwidgets --with-modules --with-harfbuzz
 --with-cairo --with-json build_alias=x86_64-redhat-linux-gnu
 host_alias=x86_64-redhat-linux-gnu CC=gcc 'CFLAGS=-O0 -g3'
 LDFLAGS=-Wl,-z,relro
 PKG_CONFIG_PATH=:/usr/lib64/pkgconfig:/usr/share/pkgconfig'

Configured features:
ACL CAIRO DBUS FREETYPE GIF GLIB GMP GNUTLS GSETTINGS HARFBUZZ JPEG JSON
LCMS2 LIBOTF LIBSELINUX LIBSYSTEMD LIBXML2 M17N_FLT MODULES NOTIFY
INOTIFY PDUMPER PNG RSVG SECCOMP SOUND THREADS TIFF TOOLKIT_SCROLL_BARS
WEBP X11 XDBE XIM XPM XWIDGETS GTK3 ZLIB

Important settings:
  value of $LANG: en_US.UTF-8
  value of $XMODIFIERS: @im=ibus
  locale-coding-system: utf-8-unix

Major mode: Lisp Interaction

Minor modes in effect:
  tooltip-mode: t
  global-eldoc-mode: t
  eldoc-mode: t
  show-paren-mode: t
  electric-indent-mode: t
  mouse-wheel-mode: t
  tool-bar-mode: t
  menu-bar-mode: t
  file-name-shadow-mode: t
  global-font-lock-mode: t
  font-lock-mode: t
  blink-cursor-mode: t
  auto-composition-mode: t
  auto-encryption-mode: t
  auto-compression-mode: t
  line-number-mode: t
  indent-tabs-mode: t
  transient-mark-mode: t

Load-path shadows:
None found.

Features:
(shadow sort mail-extr emacsbug message mailcap yank-media rmc puny
dired dired-loaddefs rfc822 mml mml-sec epa derived epg rfc6068
epg-config gnus-util rmail rmail-loaddefs auth-source cl-seq eieio
eieio-core cl-macs eieio-loaddefs password-cache json map
text-property-search time-date seq gv subr-x byte-opt bytecomp
byte-compile cconv mm-decode mm-bodies mm-encode mail-parse rfc2231
mailabbrev gmm-utils mailheader sendmail rfc2047 rfc2045 ietf-drums
mm-util mail-prsvr mail-utils help-mode cl-loaddefs cl-lib iso-transl
tooltip eldoc paren electric uniquify ediff-hook vc-hooks
lisp-float-type elisp-mode mwheel term/x-win x-win term/common-win x-dnd
tool-bar dnd fontset image regexp-opt fringe tabulated-list replace
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rfn-eshadow isearch easymenu timer select scroll-bar mouse jit-lock
font-lock syntax font-core term/tty-colors frame minibuffer cl-generic
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cl-preloaded nadvice button loaddefs faces cus-face macroexp files
window text-properties overlay sha1 md5 base64 format env code-pages
mule custom widget keymap hashtable-print-readable backquote threads
xwidget-internal dbusbind inotify lcms2 dynamic-setting
system-font-setting font-render-setting cairo move-toolbar gtk x-toolkit
x multi-tty make-network-process emacs)

Memory information:
((conses 16 53474 6237)
 (symbols 48 6794 1)
 (strings 32 19269 1625)
 (string-bytes 1 642335)
 (vectors 16 14025)
 (vector-slots 8 189932 12509)
 (floats 8 22 37)
 (intervals 56 262 0)
 (buffers 992 10))

0001-Add-command-to-refill-ERC-buffers.patch
Description: Text Data