[oe] Correct versioning of unversioned source in git

[Paul Eggleton]

On Thursday 13 March 2014 12:09:21 Koen Kooi wrote:
> Op 13 mrt. 2014, om 11:45 heeft Paul Eggleton 
<paul.eggleton at linux.intel.com> het volgende geschreven:
> > On Thursday 13 March 2014 10:59:38 Koen Kooi wrote:
> >> Tomas Novotny schreef op 13-03-14 10:08:
> >>> there is a recipe sunxi-board-fex in meta-sunxi layer. That recipe
> >>> fetches sources from unversioned git which contains definitions of some
> >>> boards (in fact it is something like a store). I'm not sure with correct
> >>> versioning in OE. Is that: PV = "1.0+git${SRCPV}" SRCREV =
> >>> "<some_gitrev_I_want>" correct? Will be change of SRCREV (only) catched
> >>> by build system (I'm curious how OE handles age of the rev in git)? Or
> >>> do
> >>> I need to raise PV to 1.1 and so on with every change to SRCREV?
> >> 
> >> The answer changes if you have more than one buildhost. If you have only
> >> one buildhost and don't care about other people rebuilding the exact
> >> same versions, 1.0+git${SRCPV} will work.
> >> 
> >> If you have more than one buildhost and/or care about other people
> >> rebuilding the exact same, you'll need to increase PR (or PV) everytime
> >> SRCREV changes. That will still cause some discrepancies if someone
> >> rebuilds after >1 SRCREV change, but upgrade paths should work when
> >> increasing PV (not with PR!).
> > 
> > Why not with PR?
> 
> because SRCPV in in PV, not PR

Right, but if you're using the PR server, that also stores the incrementing 
number at the start of SRCPV; PR may also increment when SRCREV changes as 
well (not sure on the latter). The PR server ought to be used if you care 
about this sort of thing.

Cheers,
Paul

-- 

Paul Eggleton
Intel Open Source Technology Centre