Implement --packages-below-depth

[tonynajjar]

--packages-below-depth DEPTH [PKG_NAME …]
Select the packages with the passed names as well as their recursive dependencies down to the given depth.

It could also be called --packages-up-to-depth
Did I miss another obvious way to achieve this? Thanks!

[cottsay]

Could you give an example scenario where this would be useful?

[tonynajjar]

Sure! In my usecase, I have custom packages that depend on third-party packages. I also have a metapackage that lists only my custom packages.

With this option I aim to select only my custom packages with
--packages-below-depth 2 <my-meta-package> (or depth=1, not sure where it starts counting from)

One reason to do this is to run tests of only my custom packages.