What?

This article proposes a novel, simpler way of managing Drupal sites (where “managing” in this case is solely code updating & deployment).

It relies on only one command-line tool: mr (“a Multiple Repository management tool”, http://joeyh.name/code/mr/), plus a Drupal plug-in for that tool: mr-drupal, https://github.com/wimleers/mr-drupal.

Why?

If you run Drupal sites, you need some way to manage them; some way to keep them up-to-date. As of Drupal 7, there’s a built-in update manager, but it doesn’t use a VCS.

Most likely, you want use a VCS to manage your Drupal site. You may be downloading tarballs and checking their contents into your VCS, or maybe you’re using git submodules or even git-subtree. For all of these, there’s a whole lot of process, a lot of steps, a lot to learn, and a lot of tricky things you have to think about each time you want to update something. Too much that can go wrong.