128 lines
4.6 KiB
EmacsLisp
128 lines
4.6 KiB
EmacsLisp
;;; org-unique-id.el --- Create unique IDs for org headers -*- lexical-binding: t -*-
|
||
|
||
;; Author: Lucien Cartier-Tilet <lucien@phundrak.com>
|
||
;; Maintainer: Lucien Cartier-Tilet <lucien@phundrak.com>
|
||
;; Version: 0.2
|
||
;; Package-Requires: ((emacs "25.1") (org "9.3"))
|
||
;; Homepage: https://labs.phundrak.com/phundrak/org-unique-id
|
||
;; Keywords: convenience
|
||
|
||
|
||
;; This file is not part of GNU Emacs
|
||
|
||
;; This program is free software: you can redistribute it and/or modify
|
||
;; it under the terms of the GNU General Public License as published by
|
||
;; the Free Software Foundation, either version 3 of the License, or
|
||
;; (at your option) any later version.
|
||
|
||
;; This program is distributed in the hope that it will be useful,
|
||
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||
;; GNU General Public License for more details.
|
||
|
||
;; You should have received a copy of the GNU General Public License
|
||
;; along with this program. If not, see <https://www.gnu.org/licenses/>.
|
||
|
||
|
||
;;; Commentary:
|
||
|
||
;; This package is inspired by a blog post I published about a year
|
||
;; before I decided to write this package [1], which in turn is
|
||
;; largely inspired by another blog post [2].
|
||
;;
|
||
;; It will generate a unique ID for each headers in an org file based
|
||
;; on the headers’ name plus a random short string in order to be sure
|
||
;; to make it unique. This ID will be inserted in each header’s
|
||
;; properties as a custom ID.
|
||
;;
|
||
;; [1] https://blog.phundrak.com/better-custom-ids-orgmode/
|
||
;; [2] https://writequit.org/articles/emacs-org-mode-generate-ids.html
|
||
|
||
;;; Code:
|
||
|
||
(require 'org-id)
|
||
(require 'message)
|
||
|
||
(defgroup org-unique-id ()
|
||
"Create unique IDs for org headers."
|
||
:group 'org
|
||
:prefix "org-unique-id"
|
||
:link '(url-link :tag "Gitea" "https://labs.phundrak.com/phundrak/org-unique-id")
|
||
:link '(url-link :tag "Github" "https://github.com/Phundrak/org-unique-id"))
|
||
|
||
(defcustom org-unique-id-prefix ""
|
||
"Prefix for your org IDs."
|
||
:group 'org-unique-id
|
||
:type 'string
|
||
:safe #'stringp)
|
||
|
||
(defun org-unique-id--new (&optional prefix)
|
||
"Create a new globally unique ID.
|
||
|
||
An ID consists of two parts separated by a colon:
|
||
- a prefix
|
||
- a unique part which will be created according to `org-id-method'.
|
||
|
||
PREFIX can specify the prefix we want, the default is given by
|
||
the variable `org-unique-id-prefix'."
|
||
(let* ((prefix (if prefix
|
||
prefix
|
||
org-unique-id-prefix))
|
||
(etime (org-reverse-string (org-id-time-to-b36)))
|
||
(postfix (when org-id-include-domain
|
||
(progn
|
||
(require 'message)
|
||
(concat "@" (message-make-fqdn))))))
|
||
(concat prefix "-" (car (split-string (concat etime postfix) "-")))))
|
||
|
||
;;;###autoload
|
||
(defun org-unique-id-get (&optional pom create prefix)
|
||
"Get the CUSTOM_ID property of the entry at point-or-marker POM.
|
||
|
||
If POM is nil, refer to the entry at point. If the entry does not
|
||
have an CUSTOM_ID, the function returns nil. However, when CREATE
|
||
is non nil, create a CUSTOM_ID if none is present already. PREFIX
|
||
will be passed through to `org-unique-id--new'. In any case, the
|
||
CUSTOM_ID of the entry is returned."
|
||
(interactive)
|
||
(org-with-point-at pom
|
||
(let* ((orgpath (mapconcat #'identity (org-get-outline-path) "-"))
|
||
(heading (replace-regexp-in-string
|
||
"[_-]+$" ""
|
||
(replace-regexp-in-string
|
||
"[_-][_-]+" "-"
|
||
(replace-regexp-in-string
|
||
"[^[:alpha:][:digit:]-_]"
|
||
"-"
|
||
(if (string= orgpath "")
|
||
(org-get-heading t t t t)
|
||
(concat orgpath "-" (org-get-heading t t t t)))))))
|
||
(id (org-entry-get nil "CUSTOM_ID")))
|
||
(cond
|
||
((and id
|
||
(stringp id)
|
||
(string-match "\\S-" id)) id)
|
||
(create (setq id (org-unique-id--new (concat prefix heading)))
|
||
(org-entry-put pom "CUSTOM_ID" id)
|
||
(org-id-add-location id
|
||
(buffer-file-name (buffer-base-buffer)))
|
||
id)))))
|
||
|
||
;;;###autoload
|
||
(defun org-unique-id ()
|
||
"Add a CUSTOM_ID to all headers missing one.
|
||
|
||
Only adds ids if the `auto-id' option is set to t in the file
|
||
somewhere. ie, #+OPTIONS: auto-id:t"
|
||
(interactive)
|
||
(save-excursion
|
||
(widen)
|
||
(goto-char (point-min))
|
||
(let ((case-fold-search t))
|
||
(when (re-search-forward "^#\\+OPTIONS:.*auto-id:t" (point-max) t)
|
||
(org-map-entries (lambda () (org-unique-id-get (point) t)))))))
|
||
|
||
(provide 'org-unique-id)
|
||
|
||
;;; org-unique-id.el ends here
|