[poky] sstate status

[Richard Purdie]

On Tue, 2010-12-07 at 15:46 +0800, Tian, Kevin wrote: 
> >From: Richard Purdie [mailto:rpurdie at linux.intel.com]

> >http://git.pokylinux.org/cgit/cgit.cgi/poky-contrib/commit/?h=tk/sstate&id=0a4c46dc2c1
> >22ef5c1057380e79b75e302583b4a, siggen.py: fix python error when comparing sstate
> >generated from different srcpath
> >
> >I understand the need for this but I don't like the implementation :)
> >
> >We can't use OEROOT here as its not a standard variable and is
> >deprecated. I was initially thinking POKYBASE but that isn't right
> >either in bitbake. Hmm.
> 
> Could you elaborate why POKYBASE can't be used too? Because LAYERDIR is a
> one-time expansion action? If we're sure that POKYBASE is expanded before
> base signature generation, then it could work.

POKYBASE is poky specific and not a bitbake variable. Using it in
generic bitbake code is therefore a layer violation.

> >Chris, any suggestions? I'm actually struggling a bit to come up with a
> >variable that represents a "head" of the metadata :/. Perhaps filename
> >would be enough in this case?
> >
> >I'd also suggest we remove this path when we save the siginfo file, not
> >when we load it and do the comparison.
> 
> Yes, that's a better approach. I'll go that approach.

Thanks, I'll wait for an updated patch.

> That's my intention too. Above logic is to filter out native/cross dependencies.
> If we do that filter for native/cross tasks too, that means all dependencies 
> would be wiped out which is not what we want since they all fall into the
> match group. That's why I add the initial condition to restrict the filtering on
> on target packages. :-)

Ok, this makes sense. I merged it after adding in some comments to the
code.

I've asked Paul to pull together a branch with all the changes in for
sstate and see how we stand.


Cheers,

Richard