Edit simultaneously many buffers and save all of them after edit

Question

Windows 10, Emacs 25.1, Helm

I open 3 different files:

I need:

1. Edit simultaneously all buffers. Add text "customer/" to the node "bodyFileName"in all buffers.

2. After edit save all buffers,

Here result:

Is it possible?

Answer 1

Maybe you can try to to use multi-occur-in-this-mode. To do that process as follows:

1. open all the files you want to process (C-x f then *.json)
2. M-x multi-occur-in-this-mode then enter your search string ("bodyFileName" for instance)
3. then in the occur buffer, enter edit mode by typing e
4. here you can do your search and replace as usual C-x % for instance. For each json buffer where a match occurs you will be prompted for modification.
5. once that you have modified all you want you can leave occur edit mode by C-c C-c
6. to close occur buffer type q
7. save all modified buffers: C-x s

---

Update Omar is right, I have multi-occur-in-this-mode function in my Emacs config for so long.... that I completely forgot that it is not a built-in function but a function described in Mastering Emacs.

(eval-when-compile
  (require 'cl))

(defun get-buffers-matching-mode (mode)
  "Returns a list of buffers where their major-mode is equal to MODE"
  (let ((buffer-mode-matches '()))
   (dolist (buf (buffer-list))
     (with-current-buffer buf
       (if (eq mode major-mode)
           (add-to-list 'buffer-mode-matches buf))))
   buffer-mode-matches))

(defun multi-occur-in-this-mode ()
  "Show all lines matching REGEXP in buffers with this major mode."
  (interactive)
  (multi-occur
   (get-buffers-matching-mode major-mode)
   (car (occur-read-primary-args))))