[oe] PRINC migration questions

[Bryan Evenson]

All,

I am on poky/dylan and have not yet started using the PR server.  I really do want to start using the PR server and stop using PRINC.  However, even more so I really don't want to break my package feeds.  I want to make sure I do my migration correctly and I don't do something that looks like it works okay only to find out it causes problems later.  With that in mind, I am looking for advice on the proper way to migrate away from using PRINC.

Let's say I have a .bbappend in my private layer with the line:

PRINC := "${@int(PRINC) + 4}"

The mainline layer's .bb has the line:

PR = "${INC_PR}.0"

And the mainline layer's .inc has the line:

INC_PR = "r8"

In this scenario, the resulting PR will be "r12.0".  Now let's say I want to start using the PR server and get rid of PRINC in this recipe.  The resulting package contents are to be the same, so I want the resulting PR to be "r12.0".  From some limited testing, if I start the PR server and remove the PRINC line from my .bbappend the resulting PR is "r8.0".  So in my .bbappend should I change the PRINC line to:

INC_PR = "r12"

Or should I change it to something else?  If I change it to a hardcoded value, then I'll have to be careful about what to do if the mainline recipe changes INC_PR.  How have other people handled this situation?

Thanks,
Bryan