please use M-x clean-buffer-list instead, which is defined in midnight.el
clean-buffers is a little tool that used to clean useless buffers which means buffers match specify regex (see `clean-buffer-useless-buffer-names’) or undisplayed time exceeded certain time (see `clean-buffer-useless-buffer-timeout’)
config `useless-buffer-names’ or `useless-buffer-time-out’ and then execute the following commands:
`clean-buffers-kill-useless-buffers’ to clean useless buffers
or `clean-buffers-turn-on-auto-clean-buffers’ to clean useless buffers automatically
- clean-buffers-kill-active-buffer
If no-nil, will clean active buffer. Default to nil.
- clean-buffers-kill-proces-holding-buffer
If non-nil, will clean process-holding buffer. Default to nil
- clean-buffers-judge-useless-buffer-functions
function list which used to determine a buffer is useless or not
the function will take a buffer as the only argument and should return non-nil when the buffer is a useless buffer.
- clean-buffers-useless-buffer-time-out
buffers who’s undisplayed time exceeded this value will be considered useless
- clean-buffers-useless-buffer-names
buffers who’s name match one regex in this value will be considered useless.
- clean-buffers-useful-buffer-names
buffers who’s name match one regex in this value will not considered useless.