Some bouncers multiplex connections to various servers, but have to
modify nicks and channel names to make this work. The channel
#emacs on irc.libera.chat becomes
#emacs/irc.libera.chat.
The options rcirc-nick-filter and rcirc-channel-filter
can be used to make this feel more natural. When set to functions,
these will be used to change how nicks and channel names are
displayed. A simple configuration to fix the above example might be:
(defun my/rcirc-remove-suffix (STR)
"Remove suffixes from STR."
(save-match-data
(if (string-match "/[[:alpha:]]+?\\'" str)
(substring str 0 (match-beginning 0))
str)))
(setopt rcirc-nick-filter #'my/rcirc-remove-suffix
rcirc-channel-filter #'local/rcirc-soju-suffix)