rosdep successfully installs pip package, but then has error: failed to detect pip package

[peterpolidoro]

rosdep used to work with my setup and now it fails with a strange error and I am not sure what changed. I have a Trusty/Jade installation using python 2.7 and pip 1.5.4. Perhaps the problem is not with rosdep, but I am not sure where else to look. One of my ros packages depends on a pip package. In my catkin workspace I run "rosdep install --from-paths ." I get the following error:

Successfully installed my-pip-package
Cleaning up...
ERROR: the following rosdeps failed to install
    pip: Failed to detect successful installation of [my_pip_package]

If I run "rosdep install --from-paths ." again I get the following error:

Requirement already up-to-date: my-pip-package in /usr/local/lib/python2.7/dist-packages
ERROR: the following rosdeps failed to install
    pip: Failed to detect successful installation of [my_pip_package]

[wjwwood]

@peterpolidoro This might be related to #412/#415? I'll try to look into it as soon as I get a chance. A workaround might be to downgrade your version of rosdep to 0.11.2 or older, but that might have other issues.

[wjwwood]

@peterpolidoro Can you post the output of pip show my_pip_package? As well as check the return code (echo $?)?

[peterpolidoro]

No output from pip show my_pip_package. The return code is 0. If I run pip install my_pip_package, the output is Requirement already satisfied. pip -V outputs pip 1.5.4 from /usr/lib/python2.7/dist-packages (python 2.7).

[wjwwood]

Can you verify what version of rosdep you're using with rosdep --version?

[peterpolidoro]

0.11.4

[wjwwood]

I was just catching up on this issue again. I was still unable to reproduce what you're talking about. While working on another issue (different project) about a year ago, I do remember some changes in pip related to this.

@peterpolidoro, or anyone else really, do you know if this is still a problem?

I'm going to close for now, but I can reopen if it is.

[alecive]

@wjwwood I am currently having this issue on my docker builds : https://hub.docker.com/r/scazlab/human_robot_collaboration/builds/bjv5btpo5fencqmzdclekv6/

Relevant code snippet (at the end of the page I linked above):

Downloading/unpacking backports.ssl-match-hostname

  Downloading backports.ssl_match_hostname-3.5.0.1.tar.gz

  Running setup.py (path:/tmp/pip_build_root/backports.ssl-match-hostname/setup.py) egg_info for package backports.ssl-match-hostname

    

Installing collected packages: backports.ssl-match-hostname

  Running setup.py install for backports.ssl-match-hostname

    

Successfully installed backports.ssl-match-hostname
Cleaning up...

�[91mERROR: the following rosdeps failed to install
  pip: Failed to detect successful installation of [backports.ssl_match_hostname]
�[0m
�[1mexecuting command [apt-get install -y libnlopt-dev]�[0m
�[1mexecuting command [apt-get install -y ros-indigo-rospy-tutorials]�[0m
�[1mexecuting command [apt-get install -y python-bson]�[0m
�[1mexecuting command [apt-get install -y ros-indigo-pr2-description]�[0m
�[1mexecuting command [apt-get install -y ros-indigo-rosauth]�[0m
�[1mexecuting command [apt-get install -y python-twisted-core]�[0m
�[1mexecuting command [apt-get install -y ros-indigo-moveit-core]�[0m
�[1mexecuting command [apt-get install -y ros-indigo-tf-conversions]�[0m
�[1mexecuting command [apt-get install -y libnlopt0]�[0m
�[1mexecuting command [apt-get install -y ros-indigo-urdf]�[0m
�[1mexecuting command [pip install -U backports.ssl_match_hostname]�[0m

Removing intermediate container 3fb02a9ca367

The command '/bin/bash -c cd ~/ros_ws      && rosdep install -y --from-paths src --ignore-src --rosdistro $ROS_DISTRO' returned a non-zero code: 1
click

[wjwwood]

@alecive Hmm, I'm not sure. I don't really have time to dig into the issue, but if you come up with a root cause maybe I can help get a fix in. Just glancing at your Dockerfile maybe you could try jumping into it at the end and running the rosdep command again but not as the root user.

[alecive]

Although running rosdep without root might solve the issue, I don't think it is advisable. Furthermore:

• This issue appeared only in the past two weeks, whereas it was working fine in the past year or so
• I have another Dockerfile that does the same thing without issues ( this one )

Also, if I install the package before running rosdep, i.e. by adding the following:

RUN pip2 install backports.ssl-match-hostname
RUN pip2 show backports.ssl-match-hostname

The error becomes:

Requirement already up-to-date: backports.ssl-match-hostname in /usr/local/lib/python2.7/dist-packages
Cleaning up...
ERROR: the following rosdeps failed to install
  pip: Failed to detect successful installation of [backports.ssl_match_hostname]

So, do you have any idea on what might have changed in the past two to four weeks? My rosdep version is 0.11.8

[alecive]

@wjwwood the answer apparently is that pip changed. I fixed my issue by following this github issue start-jsk/jsk_apc#1527 and running pip install pip --upgrade as root in my Dockerfile before running rosdep.

[mathias-luedtke]

@alecive: pip replaces underscores with dashes internally, so pip2 install backports.ssl-match-hostname should work without upgrading pip.

[monk279]

It couldn't solve the issue in my case...