PYTHONPATH problems when extending workspace that has an install space

[argenos]

System Info

• Operating System: Linux 4.15.0-36-generic 39~16.04.1-Ubuntu SMP Tue Sep 25 08:59:23 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux
• Python Version: 2.7.12
• Version of catkin_tools: 0.4.4
• ROS Distro: kinetic

Build / Run Issue

I have two workspaces, stable_ws with an install space in /opt/ros/stable_ws and devel_ws which is extending the former. Unfortunately, whenever I make changes to the source code in my devel_ws, the code that gets imported is the one in /opt/ros/stable_ws.

Expected Behavior

Whenever I make changes in the devel_ws, those changes should be the ones being run, i.e. the PYTHONPATH should have the following order:

devel_ws/devel:/opt/ros/stable_ws:/opt/ros/kinetic

Actual Behavior

Sourcing /opt/ros/stable_ws/setup.zsh makes the PYHTONPATH:

/opt/ros/stable_ws/lib/python2.7/dist-packages:/opt/ros/kinetic/lib/python2.7/dist-packages:/home/argen/stable_ws/devel/lib/python2.7/dist-packages

Sourcing devel_ws/devel/setup.zsh, my PYHTONPATH looks like this:

/opt/ros/stable_ws/lib/python2.7/dist-packages:/home/argen/devel_ws/devel/lib/python2.7/dist-packages:/opt/ros/stable_ws/lib/python2.7/dist-packages:/opt/ros/kinetic/lib/python2.7/dist-packages

Since the stable_ws is being imported at the beginning of the list, the changes in devel_ws are not being used.

Steps to Reproduce the Issue

I created a toy example, where I cloned the ros tutorials on both workspaces (stable and devel), here are their configs:

--------------------------------------------------------
Profile:                     default
Extending:        [explicit] /opt/ros/kinetic
Workspace:                   /home/argen/stable_ws
--------------------------------------------------------
Source Space:       [exists] /home/argen/stable_ws/src
Log Space:          [exists] /home/argen/stable_ws/logs
Build Space:        [exists] /home/argen/stable_ws/build
Devel Space:        [exists] /home/argen/stable_ws/devel
Install Space:      [exists] /opt/ros/stable_ws
DESTDIR:            [unused] None
--------------------------------------------------------
Devel Space Layout:          linked
Install Space Layout:        merged
--------------------------------------------------------
Additional CMake Args:       None
Additional Make Args:        None
Additional catkin Make Args: None
Internal Make Job Server:    True
Cache Job Environments:      False
--------------------------------------------------------
Whitelisted Packages:        None
Blacklisted Packages:        None
--------------------------------------------------------
Workspace configuration appears valid.
--------------------------------------------------------

---------------------------------------------------------
Profile:                     default
Extending:        [explicit] /opt/ros/stable_ws
Workspace:                   /home/argen/devel_ws
---------------------------------------------------------
Source Space:       [exists] /home/argen/devel_ws/src
Log Space:          [exists] /home/argen/devel_ws/logs
Build Space:        [exists] /home/argen/devel_ws/build
Devel Space:        [exists] /home/argen/devel_ws/devel
Install Space:      [unused] /home/argen/devel_ws/install
DESTDIR:            [unused] None
---------------------------------------------------------
Devel Space Layout:          linked
Install Space Layout:        None
---------------------------------------------------------
Additional CMake Args:       None
Additional Make Args:        None
Additional catkin Make Args: None
Internal Make Job Server:    True
Cache Job Environments:      False
---------------------------------------------------------
Whitelisted Packages:        None
Blacklisted Packages:        None
---------------------------------------------------------
Workspace configuration appears valid.
---------------------------------------------------------

However, I was not able to reproduce my problem with this toy setup; the PYHTONPATH after sourcing devel_ws seems correct:

/home/argen/devel_ws/devel/lib/python2.7/dist-packages:/opt/ros/stable_ws/lib/python2.7/dist-packages:/opt/ros/kinetic/lib/python2.7/dist-packages:/home/argen/stable_ws/devel/lib/python2.7/dist-packages

Any clues on what I could have messed up configuring my non-toy setup? The configs look exactly the same, but my workspaces have many more repositories. Is there anything else I can check?

Thanks!