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(defun config-man-pages ()
(let* ((manpath (getenv "MANPATH"))
(directories (split-string manpath ":" t))
(that-exist (seq-filter 'file-exists-p directories))
(files (mapcar (lambda (d)
(directory-files-recursively d ".*" nil))
that-exist))
(flattened (flatten-list files))
(pages (mapcar 'file-name-nondirectory flattened))
(without-second-ext (mapcar (lambda (p)
(let ((extension (file-name-extension p)))
(if (string-match-p "^[0-9+]$" extension)
p
(file-name-sans-extension p))))
pages)))
without-second-ext))
(defun config-man-locate-page (page)
(with-temp-buffer
(let ((exit-code (call-process "man" nil (current-buffer) nil "--where" page)))
(when exit-code
(let* ((output (buffer-string))
(trimmed (string-trim-right output "\n")))
trimmed)))))
(defun config-man-advice (orig &rest args)
(interactive)
(let ((page (or args (list (completing-read "Select page: " (config-man-pages) nil t)))))
(apply orig page)))
(advice-add 'man :around 'config-man-advice)
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