In my *helm for files* buffer are listed buffers of the form *~/some/path/to/a/file output* and I'd like to hide them thanks to helm-boring-file-regexp-list. My current attempt with the setting below doesn't work, I guess because of the space in the buffer name.

What am I missing?

(setq helm-boring-file-regexp-list '("\\.swf$" "\\.elc$" "\\.pyc$" "\\.aux$"
                                     "\\.idx$" "\\.ind$" "\\.lo*$" "\\.out$"
                                     "\\.toc$" "\\.lof$" "\\.lot$" "\\.acn$"
                                     "\\.acr$" "\\.alg$" "\\.bbl$" "\\.bcf$"
                                     "\\.fls$" "\\.gl*$" "\\.ist$" "\\.xml$"
                                     "\\.slo$" "\\.slg$" "\\.sls$" "\\.xdy$"
                                     "\\.unq$" "\\.mw$" "\\.nav$"
                                     "\\.pyc$" "\\.emacs.d/*"
                                     "\\.gnus.d/*" "\\.gz$"
                                     "\\.log$" "\\ output$" ))

1 Answer 1


This isn't about the space. helm-boring-file-regexp-list matches file names. A buffer like *xxx output isn't showing the content of a file (in Emacs terminology, it isn't visiting a file), so a file name filter is irrelevant. You need a buffer name filter instead: helm-boring-buffer-regexp-list.

(defun my-after-load-helm-buffers ()
  (add-to-list 'helm-boring-buffer-regexp-list " output\\*\\'"))
(eval-after 'helm-buffers '(my-after-load-helm-buffers))
  • Maybe I'm missing something but helm-for-files still displays the boring *xxx output* buffers. Jun 13, 2022 at 16:01
  • @DenisBitouzé Hmmm. Maybe I'm the one who's missing something. Why does helm for files offer the name of a non-file-visiting buffer? I don't really know helm. Jun 13, 2022 at 16:24
  • Finally, it looks like it works, but just with (add-to-list 'helm-boring-buffer-regexp-list " output\\*\\'"). Jun 13, 2022 at 19:52

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