I have written a script that does tab completion of Maven commands, with more options and plugins covered than in the official script on the Maven site.

 To install it, first follow this guide to setup tab completion on your computer (Linux or Windows with Cygwi, then download this script and put in in /etc/bash_completion.

 If you use Debian or Ubuntu, you can also get the packages for Maven 2.2.0 with advanced bash completion here: https://launchpad.net/~ludovicc/+archive/ppa/

Ludovic