When you join a channel such as
#nihongo, you’ll note the topic saying: “use ISO-2022-JP, please”.
The right way to do this for rcirc is to call
‘set-rcirc-encode-coding-system’ once you’ve joined.
If you want to send messages using
‘iso-2022-jp’ on #nihongo and stick to
‘utf-8’ everywhere else, without having to invoke the above every time, use the following setting:
(setq rcirc-coding-system-alist '(("#nihongo" iso-2022-jp))
(For this setting to take effect, you’ll have to rejoin the channel!)
AlexSchroeder recommends to set up Emacs to prefer UTF-8 everywhere and to use
‘undecided’ to decode incoming messages. Emacs will then try to decode the text as UTF-8 and if that doesn’t work, it will use its own heuristics to pick an appropriate coding system.
(prefer-coding-system 'utf-8) (setq rcirc-decode-coding-system 'undecided)
Here’s a convenient
/encoding command to change the current encoding for the current buffer only.
If you’re confused, use it without any argument to see what you’re currently using.
And here’s the code for the
(eval-after-load 'rcirc '(defun-rcirc-command encoding (arg) "Change the encoding coding system `rcirc-encode-coding-system' for the current buffer only." (interactive) (if (string= arg "") (rcirc-print process (rcirc-nick process) "NOTICE" target (symbol-name rcirc-encode-coding-system)) (setq rcirc-encode-coding-system (intern-soft arg)))))
If you follow AlexSchroeder’s advice above and use
‘undecided’ for decoding, a separate
/decoding command is unnecessary.