[ros-users] rosdep and interdependent rosdeps

Tully Foote tfoote at willowgarage.com
Mon Aug 15 02:22:04 UTC 2011

Yes, if you look in rosdep/src/rosdep/installers.py both the MacPorts
and PIP installers have test implementations including dependency

Each rosdep installer can return a list of other rosdep packages which
must be installed first.  And rosdep has the logic to call get_depends
and then install them first if they're not already installed.  So in
the HomeBrew installer you can implement the get_depends method and
then add "depends:  python-numpy" inside the homebrew specific


On Sat, Aug 13, 2011 at 2:05 PM, Ken Conley <kwc at willowgarage.com> wrote:
> Basically, the brew installer for rosdep needs to also accept a
> dependency list, which is partly described here:
> http://www.ros.org/reps/rep-0111.html#dependencies
> In REP 112, the source manager specifies this external to the
> rosdep.yaml file in order to keep metadata together.  In the case of
> brew, I imagine it would be specified within the rosdep.yaml file.
> This is not well-exercised yet, so we can work with you on making this
> easy to do.
>  - Ken
> On Sat, Aug 13, 2011 at 2:00 PM, William Woodall <wjwwood at gmail.com> wrote:
>> I am trying to get ROS going under OS X with homebrew, and I have run into
>> an issue.  Several packages depend on python-numpy, which I would like to
>> install through pip (homebrew doesn't provide a formula for this reason),
>> but before I do that I need homebrew to install gfortran.  So, do I add a
>> new rosdep to each package that also depends on numpy, or should there a
>> mechanism for inter package management dependencies.  I know you can have
>> several packages per installer rosdep (e.g. python: macports: python26
>> python_select), but that is only enough if both dependencies are in the same
>> package management system.
>> For now I have just added another rosdep (gfortran) that uses homebrew to
>> install and made that a dependency of roslib, but this is just a work
>> around.
>> Something to think about,
>> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>> William Woodall
>> Graduate Software Engineering
>> Auburn University
>> w at auburn.edu
>> wjwwood at gmail.com
>> williamjwoodall.com
>> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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Tully Foote
Systems Engineer
Willow Garage, Inc.
tfoote at willowgarage.com
(650) 475-2827

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