Helm-grep project refactoring: search and replace

With this you can readily search an entire project directory for some text, and then make whole-scale changes to any or all files containing that text. I assume you already have helm-projectile installed and you use it; if not, you’re missing out!

1. First, install wgrep and helm-wgrep, for which I use use-package and my emacs.el init file:

(use-package wgrep
  :ensure t
  :config (use-package wgrep-helm :ensure t))

1. Then, execute helm-projectile-grep for the text you desire.
2. Use C-x C-s to make permanent your search results to a buffer
3. Use C-c C-p within that result buffer to execute wgrep-change-to-wgrep-mode and now you can make edits to any lines you please (including regular emacs search-and-replace commands)
4. Use C-c C-c to save you changes, which will be promulgated to all files you’ve chosen to edit