No definition of [gazebo] for OS version [melodic]
I have a Ubuntu 18.04 docker image/container with ROS melodic and Gazebo 9 installed. When I try to run from the console within the docker container,
source devel/setup.bash && \
rosdep fix-permissions && \
rosdep update && \
rosdep install --from-paths src --ignore-src -r --rosdistro=${ROS_DISTRO} -y --os=ubuntu:melodic
rosdep complains with,
[some package]: No definition of [gazebo] for OS version [melodic]
for a handful of packages.
I can successfully launch gazebo and load models but for some reason the 'rosdep install' step is failing to find gazebo.
Any ideas why?