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On Mon, 2013-05-13 at 12:32 +0100, Tomas Frydrych wrote:
> On 13/05/13 12:06, Burton, Ross wrote:
> > The problem with bbappends is that they break every time the package
> > in oe-core changes version.
> 
> I see this as a good thing; if I maintain a bbappend, I want to know
> when the base package changes its a version, and I get an immediate
> error due to bbappend to a non-existent file.

Personally, for the .bbappends that I maintain, I would much rather not
have to go around renaming a bunch of files every time I merge a new
version of oe-core and all the recipes get upgraded. 

But, if you enjoy the errors, you could easily enough get them back even
if the filenames didn't change:

python() {
    tolerable_pvs = [ '1.0', '1.1', '1.2' ]
    pv = d.getVar('PV', True)
    if not pv in tolerable_pvs:
        bb.fatal("encountered intolerable version %s of underlying recipe, please adjust me accordingly" % pv)
}

or something.  One could wrap that in some extra sugar and put it in
base.bbclass if having the boilerplate in each .bbappend is unappealing.

p.