Windows 10, Emacs 25.1, Helm

I open 3 different files: enter image description here

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: enter image description here

Is it possible?

  • 1
    I like using the grep-mode and then wgrep to edit multiple buffers and save, and I also use multiple-cursors when in wgrep mode. There are undoubtedly other methods ... – lawlist Aug 13 '18 at 17:53

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.

  (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))))

(defun multi-occur-in-this-mode ()
  "Show all lines matching REGEXP in buffers with this major mode."
   (get-buffers-matching-mode major-mode)
   (car (occur-read-primary-args))))
  • I have not command "multi-occur-in-this-mode". I has only "multi-occur-in-matching-buffer". – a_subscriber Aug 14 '18 at 7:25
  • You can also use this command: simply fill "..filenames match regexp" with "json$", then you will be asked for "lines matching regexp" -> enter "bodyFileName", then continue (continue from step 3) – Picaud Vincent Aug 14 '18 at 8:35
  • 1
    C-x s will ask you for each buffer whethere you want to save it or not, but you can also do C-u C-x s which saves all without prompting. – Omar Aug 14 '18 at 18:59
  • 1
    I think the mysterious multi-occur-in-this-mode command, might be from this Mastering Emacs blog post. – Omar Aug 14 '18 at 19:03
  • 1
    @Omar "C-x s" also help. After it ask me to save buffer I select "!" and Emacs save ALL edited buffers. – a_subscriber Aug 15 '18 at 7:16

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