Fuerte documentation
As of ROS fuerte, rosdep is now a standalone tool that you can download and use separately:
rosdep documentation rosdep change list (repo commits)
Contents
Installing rosdep
sudo apt-get install python-rosdep
Don't forget to run:
sudo rosdep init
On non ubuntu platforms
Use pip:
sudo pip install -U rosdep
Installing system dependencies
You can use rosdep and rosmake to build any package in the ROS repository. Say that you want to build a package called AMAZING_PACKAGE, that you hadn't built on your machine before.
rosdep install AMAZING_PACKAGE
Bugs/Feature Requests
View or file new issues on github
Tutorial
See this page. There's also a list of rosdep tutorials.