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[Crystal] rosdep cannot find all required resources

asked 2019-02-11 12:52:47 -0600

clyde gravatar image

updated 2019-02-11 18:58:38 -0600

I'm having trouble with rosdep check on 18.04 and Crystal. I've done this:

pip install -U rosdep
sudo rm /etc/ros/rosdep/sources.list.d/20-default.list
sudo rosdep init
rosdep update
cd ~/ros2/orca_ws
. /opt/ros/crystal/setup.bash
colcon build --event-handlers console_direct+
. install/setup.bash
rosdep check orca_base

The output of rosdep is:

ERROR: Rosdep cannot find all required resources to answer your query
Missing resource orca_base
ROS path [0]=/home/clyde/ros2/orca_ws/install/orca_topside/share

orca_topside is one of the packages in my workspace. But why doesn't rosdep know about all of them?

As a workaround, I set ROS_PACKAGE_PATH:

export ROS_PACKAGE_PATH=/home/clyde/ros2/orca_ws/install/orca_base/share
rosdep check orca_base

New output:

All system dependencies have been satisfied
ERROR[orca_base]: Cannot locate rosdep definition for [orca_msgs]
    rosdep key : orca_msgs
    OS name    : ubuntu
    OS version : bionic
    Data: <no data>

Do I need to manually maintain ROS_PACKAGE_PATH for my workspace?


Edit -- the results of colcon version-check

colcon-argcomplete 0.3.2: up-to-date
colcon-bash 0.3.1: up-to-date
colcon-cmake 0.2.7: newer version available (0.2.8)
colcon-core 0.3.17: up-to-date
colcon-defaults 0.2.1: up-to-date
colcon-devtools 0.2.1: up-to-date
colcon-library-path 0.2.1: up-to-date
colcon-metadata 0.2.1: up-to-date
colcon-notification 0.2.6: up-to-date
colcon-output 0.2.3: up-to-date
colcon-package-information 0.2.2: up-to-date
colcon-package-selection 0.2.3: up-to-date
colcon-parallel-executor 0.2.3: up-to-date
colcon-pkg-config 0.1.0: up-to-date
colcon-powershell 0.3.3: up-to-date
colcon-python-setup-py 0.2.1: up-to-date
colcon-recursive-crawl 0.2.0: up-to-date
colcon-ros 0.3.7: up-to-date
colcon-test-result 0.3.1: up-to-date
colcon-zsh 0.3.1: up-to-date
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1 Answer

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answered 2019-02-11 14:43:05 -0600

The ROS_PACKAGE_PATH needs to contain a list of the paths to all the packages. The way you're exporting a path to it you're not chaining onto the original value so you're losing all the other paths.

All of your exports need to have :$ROS_PACKAGE_PATH on the end of them so they are concatenated onto the original value as shown below:

export ROS_PACKAGE_PATH=/home/clyde/ros2/orca_ws/install/orca_base/share:$ROS_PACKAGE_PATH

If you create a new terminal and use this command it should hopefully fix things.

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Sounds like I need to set & maintain ROS_PACKAGE_PATH by hand. Somehow I thought that Colcon would do this for me. Thanks for the answer.

clyde gravatar imageclyde ( 2019-02-11 18:04:41 -0600 )edit

Since ROS_PACKAGE_PATH is deprecated in favour of workspace chaining, colcon doesn't really do anything with it.

Geoff gravatar imageGeoff ( 2019-02-11 18:19:06 -0600 )edit

~~That is incorrect.~~ colcon-ros does extend the ROS_PACKAGE_PATH environment variable for you: Please check that you use the latest versions of all the colcon packages.

Dirk Thomas gravatar imageDirk Thomas ( 2019-02-11 18:39:32 -0600 )edit

Today's new thing learned! (I did look through the colcon docs but didn't find anything; obviously I was looking in the wrong place.)

If it is not obsolete then that wiki page should be updated with how it is actually used and managed now.

Geoff gravatar imageGeoff ( 2019-02-11 18:50:15 -0600 )edit

I am sorry I missed the context of the question. The logic I referenced is only for ROS 1 / catkin packages. It would be good to open a ticket on rosdep for this.

Dirk Thomas gravatar imageDirk Thomas ( 2019-02-11 19:04:40 -0600 )edit
clyde gravatar imageclyde ( 2019-02-11 19:26:00 -0600 )edit

I was referring to this repo:

Dirk Thomas gravatar imageDirk Thomas ( 2019-02-11 19:33:41 -0600 )edit

Ticket created: . I will mark the question as "answered." Thanks, all.

clyde gravatar imageclyde ( 2019-02-12 18:24:43 -0600 )edit

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Asked: 2019-02-11 12:52:47 -0600

Seen: 884 times

Last updated: Feb 11 '19