devroom.io/content/posts/2012-06-18-search-and-replace-in-multiple-files-with-vim.md

+++
date = "2012-06-18"
title = "Search and Replace in multiple files with Vim"
tags = ["Rails", "vim"]
slug = "search-and-replace-in-multiple-files-with-vim"
+++

I recently learned a nice VimTrick™ when pairing with [Arjan](http://arjanvandergaag.nl). We upgrade an app to Rails 3.2.6 and got the following deprecation message:

``` text
DEPRECATION WARNING: :confirm option is deprecated and will be removed from Rails 4.0.
Use ':data => { :confirm => 'Text' }' instead.
```

Well, nothing difficult about that, but we have quite a few `:confirm` in this app.

Firstly we checked where we used them (note we use ruby 1.9 hash syntax everywhere):

``` shell
ack -l "confirm:" app
```

Now you have a listing of all the files that contain the `:confirm` hash key. You can leave out the `-l` option to get some context for each find.

Now, we need to open Vim with those files:

``` shell
ack -l "confirm:" app | xargs -o vim
```

Vim will open the first of these files. Here's a snippet of what you may find:

``` haml
= link_to "Delete", something_path, confirm: "Are you sure?"
```

Now, search and replace is easy:

``` vim
:%s/confirm: ".*"/data: { & }/g
```

This will surround the current confirm with the `data` hash. Just the way Rails likes it. The `&` character will be replaced with whatever text matched the search pattern.

You could repeat this for every file manually. But, you're using Vim.

``` vim
:argdo %s/confirm: ".*"/data: { & }/g | update
```

This will perform the search and replace on each of the supplied arguments (in this case the files selected with `ack`) and update (e.g. save) those files.

Now you can quit Vim and enjoy the glory of all the disappearing deprecation warnings.

Note: to do this with the ruby 1.8 hash syntax, just update the search and replace texts accordingly.