upgrade Org link syntax to new

ID: 640d5225-d011-42b8-ae5b-3c3953885cd1

1. I use rg.el (you can use any other searching command-line tools like ag etc if you want, but need be supported by wgrep.) to search recursively over my org-directory which is ~/Org/ (I store all Org files in one place for easy backup.). So in Emacs, press command [M-x rg] to start search. You need to search all of those urlfied characters "%20, %25, %5B and %5D" one by one.

   NOTE: If your Org files are written in only English language, then that's all characters to search. If you have Chinese text, then you also need to search pattern "file:.*%". This pattern will find out all file: links contains Chinese text.

2. rg is really very fast, I have about 10000 Org files, just spent about more than 1 minute.
3. In the rg searching result buffer, press [C-c C-x C-p] to enable wgrep-mode.

4. Add Elisp command for update Org link.

   You need to evaluate following elisp code.

   (defun org-update-link-syntax (&optional no-query)
     "Update syntax for links in current buffer."
     (interactive)
     (org-with-point-at 1
       (let ((case-fold-search t))
         ;; (re-search-forward "\\[\\[[^]]*?%\\(?:2[05]\\|5[BD]\\)" nil t) ; safer matching
         (while (re-search-forward "\\[\\[[^]]*?%" nil t) ; wider matching
           (let ((object (save-match-data (org-element-context))))
             (when (and (eq 'link (org-element-type object))
                        (= (match-beginning 0)
                           (org-element-property :begin object)))
               (goto-char (org-element-property :end object))
               (let* ((uri-start (+ 2 (match-beginning 0)))
                      (uri-end (save-excursion
                                 (goto-char uri-start)
                                 (re-search-forward "\\][][]" nil t)
                                 (match-beginning 0)))
                      (uri (buffer-substring-no-properties uri-start uri-end)))
                 (when
                     ;; t ; if you don't want to confirm every one link, just use this t for automatically modify link.
                   (or no-query
                       (y-or-n-p
                        (format "Possibly obsolete URI syntax: %S.  Fix? "
                                uri)))
                   (setf (buffer-substring uri-start uri-end)
                         (org-link-escape (org-link-decode uri)))))))))))
   

   NOTE: If you don't want to confirm every one link, just use the t in when for automatically modify link.

   Thanks Nicolas Goaziou for this Elisp code.

5. save all modifications in wgrep with [C-x C-s].
6. repeat this step for all searching characters.

ID: 3923f696-9c43-4e37-90e2-3052809cab77

In latest Org version, there is already support use command org-lint to checking Org buffer.