fix: allow to disable osdeps overload warnings

[doudou]

It's a common usage pattern, and autoproj show allows to see it.

[g-arjones]

It is a common pattern but from my experience, it's often unintended too. Did you consider adding an API to disable it on a per-package basis instead?

[doudou]

It is a common pattern but from my experience, it's often unintended too.

Is it really ? My point I guess is that right now I have 5 warnings filling a page that have been there for years, making sure that the warning is thoroughly ignored anyways.

I really don't think an API would cut it. I wanted to avoid adding something to the osdeps language.

[planthaber]

I see the point, but I think this should be a per-package option, so if an override is long lasting, the override itself could be flagged as "nowarn=true" or sililar.

If it is just a short-term merge request, keeping the warning could be beneficial, to be reminded to remove the override after merging. If the MR cannot be merged upstream, the at least the warning can be removed.

On the other hand, if someone has trouble with branches, the warnings can easily be activated.

Also, a lot of my warnings are results from having multiple root package_sets defining the same dependency (and have to to be able to work standalone), here, the the per-package settign is useless, because it is a matter on the inclusion order (and not really an override).

[doudou]

To be clear... this is a configuration flag and it is false by default.

If you guys want the warnings, you keep them by default.