[poky] Proper recipe naming and PV definition

[Bruce Ashfield]

On Mon, Dec 6, 2010 at 11:02 PM, Chris Larson <clarson at kergoth.com> wrote:
> On Mon, Dec 6, 2010 at 8:46 PM, Darren Hart <dvhart at linux.intel.com> wrote:
>> You have SRCPV here - I believe you intended SRCREV - correct?
>>
>> If so, then your PV looks the same as mine above. The place where I replaced
>> the _git was in the filename of the recipe. It still isn't clear to me what
>> the _VERSION part of recipe-name_VERSION.bb is meant to indicate or how
>> exactly it is used. It clearly isn't the exact and complete version of the
>> source, that is what PE.PV is for, and PR identifies the recipe version (for
>> lack of a better description).
>
> People seem to be making this a bit more complex than it is.  The
> second component of the filename, separated by _, is simply the
> *default* value of PV, just as the first component is the default
> value of PN, and the third component is the default value of PR.
> Naturally the 2nd and 3rd are optional, and of course you can always
> override them in the recipe, it's just the default.

Yep, and that's why I was keeping just the one, since I always
preferred setting the values in the recipe itself. I recall reading
this somewhere about 10 months ago, but can't find the reference
now. Thanks for the explanation!

>
> You can see the definitions of the PN, PV, and PR variables in
> bitbake.conf -- they run a function which just splits the filename.
> If those defaults were not set there, then PN, PV, and PR would always
> have to be explicitly set.  It's just a convenience, that's all.

Agreed and thanks,

Bruce

> --
> Christopher Larson
> clarson at kergoth dot com
> Founder - BitBake, OpenEmbedded, OpenZaurus
> Maintainer - Tslib
> Senior Software Engineer, Mentor Graphics
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