bug#62151: 30.0.50; ERC 5.5: /MOTD should not trigger erc-network hooks

[J.P.]

Tags: patch

When you issue an /motd command, ERC 5.5 prints a misleading warning. In
prior versions, MOTD hook members defined in erc-networks would still
run unnecessarily, but they'd do so without bothering the user. While
unwelcome from a UX perspective, this new behavior also marks a (likely
benign) functional regression because the purpose of the logic in
question has evolved to initializing and auditing core aspects of the
client model. So rather than suppress the warning, we ought to inhibit
these hook members from running, if only for peace of mind. This patch
offers one way to do that, but if anyone has a better idea, please
share.

(Also, I don't think it's worth creating a patch release for this issue
alone, but its changes could possibly accompany a more critical fix
should one emerge in the coming months.)

Thanks to incal for raising this issue on Libera.


In GNU Emacs 30.0.50 (build 1, x86_64-pc-linux-gnu, GTK+ Version
 3.24.35, cairo version 1.17.6) of 2023-03-11 built on localhost
Repository revision: b8e7061232f9a5b06af70031dcc4b48c6575a364
Repository branch: master
Windowing system distributor 'The X.Org Foundation', version 11.0.12014000
System Description: Fedora Linux 36 (Workstation Edition)

Configured using:
 'configure --enable-check-lisp-object-type --enable-checking=yes,glyphs
 'CFLAGS=-O0 -g3'
 PKG_CONFIG_PATH=:/usr/lib64/pkgconfig:/usr/share/pkgconfig'

Configured features:
ACL CAIRO DBUS FREETYPE GIF GLIB GMP GNUTLS GPM GSETTINGS HARFBUZZ JPEG
JSON LCMS2 LIBOTF LIBSELINUX LIBSYSTEMD LIBXML2 M17N_FLT MODULES NOTIFY
INOTIFY PDUMPER PNG RSVG SECCOMP SOUND SQLITE3 THREADS TIFF
TOOLKIT_SCROLL_BARS WEBP X11 XDBE XIM XINPUT2 XPM 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
  line-number-mode: t
  indent-tabs-mode: t
  transient-mark-mode: t
  auto-composition-mode: t
  auto-encryption-mode: t
  auto-compression-mode: t

Load-path shadows:
None found.

Features:
(shadow sort mail-extr emacsbug message mailcap yank-media puny dired
dired-loaddefs rfc822 mml mml-sec epa epg rfc6068 epg-config gnus-util
text-property-search mm-decode mm-bodies mm-encode mail-parse rfc2231
mailabbrev gmm-utils mailheader sendmail rfc2047 rfc2045 ietf-drums
mm-util mail-prsvr mail-utils erc-goodies erc derived iso8601 time-date
thingatpt pp format-spec erc-backend erc-networks easy-mmode erc-common
inline erc-compat pcase rx url-parse auth-source cl-seq eieio eieio-core
cl-macs password-cache json map byte-opt gv bytecomp byte-compile
url-vars subr-x cl-loaddefs cl-lib erc-loaddefs rmc iso-transl tooltip
cconv 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 newcomment
text-mode lisp-mode prog-mode register page tab-bar menu-bar rfn-eshadow
isearch easymenu timer select scroll-bar mouse jit-lock font-lock syntax
font-core term/tty-colors frame minibuffer nadvice seq simple cl-generic
indonesian philippine cham georgian utf-8-lang misc-lang vietnamese
tibetan thai tai-viet lao korean japanese eucjp-ms cp51932 hebrew greek
romanian slovak czech european ethiopic indian cyrillic chinese
composite emoji-zwj charscript charprop case-table epa-hook
jka-cmpr-hook help abbrev obarray oclosure cl-preloaded button loaddefs
theme-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 dbusbind inotify lcms2
dynamic-setting system-font-setting font-render-setting cairo
move-toolbar gtk x-toolkit xinput2 x multi-tty make-network-process
emacs)

Memory information:
((conses 16 118811 8756)
 (symbols 48 9966 0)
 (strings 32 25111 1673)
 (string-bytes 1 826194)
 (vectors 16 13831)
 (vector-slots 8 199722 5994)
 (floats 8 24 56)
 (intervals 56 231 0)
 (buffers 976 10))

0001-5.6-Add-MOTD-command-to-ERC.patch
Description: Text Data