Add ros2plugin

[artivis]

Add the plugin command together with the list verb to ros2 CLI.

At the moment it produces the following results:

$ ros2 plugin list
demo_plugin_component:
	Plugin(name='ros2_playground::MessageWriterDerived', type='ros2_playground::MessageWriterDerived', base='ros2_playground::MessageWriter')
rviz_default_plugins:
	Plugin(name='rviz_default_plugins/Camera', type='rviz_default_plugins::displays::CameraDisplay', base='rviz_common::Display')
	Plugin(name='rviz_default_plugins/Grid', type='rviz_default_plugins::displays::GridDisplay', base='rviz_common::Display')
	...

while passing the flag --packages only list packages that export plugins and the relative path to the XML file(s ?),

$ ros2 plugin list --packages
demo_plugin_component:
	share/demo_plugin_component/plugins_description.xml
rviz_default_plugins:
	share/rviz_default_plugins/plugins_description.xml

I'd be more than open to discuss actual output and/or output layout.

Note this does not exactly mimic ROS 1 in terms of prints layout nor in terms of use (yet),
e.g. ROS 1 --> rospack plugins --attrib=plugin <base_package_name>.

Fix ros2/ros2cli#328
Replace ros2/ros2cli#340

Signed-off-by: artivis [email protected]

[nuclearsandwich]

@ros-pull-request-builder retest this please

[nuclearsandwich]

@artivis I'll do an initial review of this PR, hopefully before the end of this week. Will you be able to assume maintainership of the ros2plugin package once it's merged? I'll take care of making sure you have the access you need and set up the necessary metadata to route notifications appropriately.

[artivis]

@nuclearsandwich yes I'll assume maintainership of the ros2plugin once merged 👍

[artivis]

@nuclearsandwich Hey, any update for this PR?

[artivis]

Good catch, thanks @Arnatious!

[kyrofa]

@nuclearsandwich gentle ping on this.

[doisyg]

Any update on this ? Or is there already a way of listing installed plugins ?

[HansRobo]

@nuclearsandwich
I'm looking forward to this feature, any plans to merge it in ros2?

[ljaniec]

Hello, @nuclearsandwich @artivis @Arnatious @audrow

What is missing from this PR before it can be merged?

Best,
Łukasz

[mnumanuyar]

any news on this ?

[jonselling]

I was hoping this feature would be in ROS 2, is there any plans to merge this in or get it looked at again?

[esteve]

@Arnatious @nuclearsandwich is there anything else that needs to be addressed for this PR? It'd be a great functionality for the ros2 cli. Thanks.

[quantumxt]

Is there any update on this feature?