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132 lines
4.9 KiB
EmacsLisp
132 lines
4.9 KiB
EmacsLisp
;;; ol-man.el --- Links to man pages -*- lexical-binding: t; -*-
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;;
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;; Copyright (C) 2020-2024 Free Software Foundation, Inc.
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;; Author: Carsten Dominik <carsten.dominik@gmail.com>
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;; Maintainer: Bastien Guerry <bzg@gnu.org>
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;; Keywords: outlines, hypermedia, calendar, text
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;; URL: https://orgmode.org
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;;
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;; This file is part of GNU Emacs.
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;;
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;; GNU Emacs is free software: you can redistribute it and/or modify
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;; it under the terms of the GNU General Public License as published by
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;; the Free Software Foundation, either version 3 of the License, or
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;; (at your option) any later version.
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;; GNU Emacs is distributed in the hope that it will be useful,
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;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;; GNU General Public License for more details.
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;; You should have received a copy of the GNU General Public License
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;; along with GNU Emacs. If not, see <https://www.gnu.org/licenses/>.
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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;;
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;;; Commentary:
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;; This file implements links to man pages from within Org mode.
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;;; Code:
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(require 'org-macs)
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(org-assert-version)
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(require 'ol)
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(org-link-set-parameters "man"
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:complete #'org-man-complete
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:follow #'org-man-open
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:export #'org-man-export
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:store #'org-man-store-link)
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(defcustom org-man-command 'man
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"The Emacs command to be used to display a man page."
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:group 'org-link
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:type '(choice (const man) (const :tag "WoMan (obsolete)" woman)))
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(declare-function Man-translate-references "man" (ref))
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(defun org-man-open (path _)
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"Visit the manpage on PATH.
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PATH should be a topic that can be thrown at the man command.
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If PATH contains extra ::STRING which will use `occur' to search
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matched strings in man buffer."
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(require 'man) ; For `Man-translate-references'
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(string-match "\\(.*?\\)\\(?:::\\(.*\\)\\)?$" path)
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(let* ((command (match-string 1 path))
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;; FIXME: Remove after we drop Emacs 29 support.
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;; Working around security bug #66390.
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(command (if (not (equal (Man-translate-references ";id") ";id"))
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;; We are on Emacs that escapes man command args
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;; (see Emacs commit 820f0793f0b).
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command
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;; Older Emacs without the fix - escape the
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;; arguments ourselves.
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(mapconcat 'identity
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(mapcar #'shell-quote-argument
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(split-string command "\\s-+"))
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" ")))
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(search (match-string 2 path))
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(buffer (funcall org-man-command command)))
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(when search
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(with-current-buffer buffer
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(goto-char (point-min))
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(unless (search-forward search nil t)
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(let ((process (get-buffer-process buffer)))
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(while (process-live-p process)
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(accept-process-output process)))
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(goto-char (point-min))
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(search-forward search))
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(forward-line -1)
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(let ((point (point)))
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(let ((window (get-buffer-window buffer)))
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(set-window-point window point)
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(set-window-start window point)))))))
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(defun org-man-store-link (&optional _interactive?)
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"Store a link to a README file."
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(when (memq major-mode '(Man-mode woman-mode))
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;; This is a man page, we do make this link
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(let* ((page (org-man-get-page-name))
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(link (concat "man:" page))
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(description (format "Manpage for %s" page)))
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(org-link-store-props
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:type "man"
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:link link
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:description description))))
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(defun org-man-get-page-name ()
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"Extract the page name from the buffer name."
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;; This works for both `Man-mode' and `woman-mode'.
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(if (string-match " \\(\\S-+\\)\\*" (buffer-name))
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(match-string 1 (buffer-name))
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(error "Cannot create link to this man page")))
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(defun org-man-export (link description backend)
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"Export a man page LINK with DESCRIPTION.
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BACKEND is the current export backend."
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(let ((path (format "http://man.he.net/?topic=%s§ion=all" link))
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(desc (or description link)))
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(cond
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((eq backend 'html) (format "<a target=\"_blank\" href=\"%s\">%s</a>" path desc))
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((eq backend 'latex) (format "\\href{%s}{%s}" path desc))
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((eq backend 'texinfo) (format "@uref{%s,%s}" path desc))
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((eq backend 'ascii) (format "[%s] (<%s>)" desc path))
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((eq backend 'md) (format "[%s](%s)" desc path))
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(t path))))
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(defvar Man-completion-cache) ; Defined in `man'.
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(defun org-man-complete (&optional _arg)
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"Complete man pages for `org-insert-link'."
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(require 'man)
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(concat
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"man:"
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(let ((completion-ignore-case t) ; See `man' comments.
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(Man-completion-cache)) ; See `man' implementation.
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(completing-read
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"Manual entry: "
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'Man-completion-table))))
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(provide 'ol-man)
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;;; ol-man.el ends here
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