Hi,

As of rosinstall version 0.5.12 it will no longer use bashisms in the 
setup.sh file.  They have been moved to setup.bash.  And for zsh users 
there is also a setup.zsh generated.

For existing bash users this will mean that until you switch to use 
setup.bash instead of setup.sh you will not have the command line tools 
you are used to such as rosrun roscd and tab completion.

This was ticketed at https://code.ros.org/trac/ros/ticket/2860

I have tried to update references on the wiki.  If you run into one I 
missed please update it to reference setup.bash, unless the reference is 
for a specific different shell.

A similar change will be made in the /opt/ros/ROSDISTRO/setup.sh will be 
seperated to setup.sh for environment and setup.bash for bash specific 
calls.  TIcketed at https://code.ros.org/trac/ros/ticket/3243

Tully