Helm swoop on all project files (not just current buffers)

Question

So I'm looking to have helm-swoop look at all files in a project, not just the current set of open buffers.

This is so I can use swoop to find all occurrences in a project, mark relevant ones, then edit them (in helm swoops edit mode).

I feel that there's probably a clean way to do this with Helm/Helm swoop but here's my attempt to think through a solution:

1. gather filenames from projectile
2. create a list of buffers from the filename list
3. do the same routine as helm-multi-swoop-all besides using this new buffer list

(projectile-current-project-files), looks like it gives me the file list I'm looking for.

So helm-multi-swoop-all, looks like it'd be fairly easy to copy and then tweak.

(defun helm-multi-swoop-all (&optional $query)
  (interactive)
  "Apply all buffers to helm-multi-swoop"
  (cond ($query
         (setq helm-multi-swoop-query $query))
        (mark-active
         (let (($st (buffer-substring-no-properties
                     (region-beginning) (region-end))))
           (if (string-match "\n" $st)
               (message "Multi line region is not allowed")
             (setq helm-multi-swoop-query
                   (helm-swoop-pre-input-optimize $st)))))
        ((setq helm-multi-swoop-query
               (helm-swoop-pre-input-optimize
                (funcall helm-swoop-pre-input-function))))
        (t (setq helm-multi-swoop-query "")))
  (helm-multi-swoop--exec nil
                          :$query helm-multi-swoop-query
                          :$buflist (helm-multi-swoop--get-buffer-list)))

Just replace the call to helm-multi-swoop--get-buffer-list, to one that provided a list of buffers using projectiles list.

But now I'm a little stuck. I'm not sure how to create a list of buffers to feed into helm-swoop from a set of file names.

I also can't help but think there's a simpler way to achieve this, maybe without custom functions.

Answer 1

Following the interesting comments from PythonNut, I installed helm-ag, and ran helm-projectile-ag from the projectile package via C-c p s s. I then switched to editing mode with C-c C-e. I changed a few lines and then pressed C-c C-c and these were saved to the relevant files.

This works, but at present one infellicity is that it saves each of the "matched" files multiple times regardless of whether there was a change or not. I raised this as projectile #756.

Apart from that I think it would work well for the need mentioned in the question, and "without custom functions" :-)