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I find in ros dockerhub, there are different images for melodic images, such as latest, melodic-ros-core-stretch,melodic-ros-base-stretch,what is the difference among those? Specifically, I want to know what the difference between core and base? What does stretch stand for?
The DockerHub image naming is as follows:
ros:<ROS_DISTRO>-<ros metapackage>-<OS name>
So for ros:melodic-ros-base-stretch:
melodicros_basestretch (for Debian stretch), or bionic for Ubuntu bionic (18.04)The content of the various packages ros_core, ros_base etc can be found on the metapackages repository:
As you can see ros_base is ros_core + actionlib, bond_core, dynamic_reconfigure, nodelet_core.
You're right, that's where the official list of repositories is defined.
In practice I tend to refer to the metapackages directly as it's the effective list and an easier place to retrieve and process (same files, to check another distro just need to change branch, machine readable). It gets trickier with the REPs as you need to point to different sources based on the ROS disto (REP 142, REP 150 and maybe another one for Noetic) and within those reps check for verbiage like "kinetic and newer" to know what repositories are actually included.
Asked: 2020-02-28 13:53:16 -0500
Seen: 706 times
Last updated: Feb 29 '20
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