Improve listing of compatible plugins for images with children

[maverickgoose28]

I am trying to list plugins that are compatible to be run against an image *and* any child images.

However, when using target-query --children <target> -l the plugins returned are the intersect of the plugins that can be run against all images.

For example, if there is an image A that has child docker container images B and C, if I run the command target-query --children <target> -l the docker plugin would not be returned because it's only valid for image A.

I feel like it would make more sense to return the superset of all plugins that would be compatible with A, B, or C, even if that includes some plugins that aren't compatible with all images?

Also, as a workaround I tried to get the plugins for each child by using target-query <target> --child <child path or index> -l and it returns the plugins for the parent not the child. Would it make more sense to return the plugins compatible with the child in this scenario?

[Schamper]

I'm marking this as both a bug and an enhancement since this should be the expected behavior. -l should operate on the selected child --child X or all that can possibly be ran --children.

[EinatFox]

Adding to what @Schamper said above we agreed that:
target-query --children <target> -l gives results for all children (without parent), per child
target-query <target> --child <child path or index> -l gives result for a specific child
target-query <target> -l gives results for parent only