[yocto] Unable to modify patch files in u-boot recipe - quilt applies direct from layer files

[Paul Eggleton]

On Wednesday 04 November 2015 17:16:32 Khem Raj wrote:
> > On Nov 4, 2015, at 11:57 AM, Chris Hallinan <challinan at gmail.com> wrote:
> > I was trying to "patch a patch" in a u-boot recipe using standard
> > bbappends technique.  I added a task before do_patch after do_unpack
> > to munge the patch that was broken.  Here is what seems to happen:
> > 
> > do_unpack:
> >    copies all the patch files from the metadata layer into ${WORKDIR}
> > 
> > do_fix_patch (my additional task)
> > 
> >    uses sed or patch to apply a local fix to a broken patch in ${WORKDIR}
> > 
> > do_patch
> > 
> >    creates a subdirectory in ${S} called "patches", and puts links to
> > 
> > the actual files in the layer and uses those links back to the layer
> > files to apply the patches.
> > 
> > It seems quilt is using the actual layer files instead of the ones in
> > ${WORKDIR}??
> > 
> > This seems odd and somehow wrong.  We copy the layer files into
> > WORKDIR, and the unsuspecting user (me) thinks those are the files
> > that do_patch will use.
> > 
> > This one took me some time (and help) to figure out!
> > 
> > Comments?  Is this a bug?  halfway in the middle of some architectural
> > changes?  Expected behavior?
> 
> while what you are doing is quite questionable. You seem to have a point.
> Most probably copy of the files in workdir should be removed from
> happening.
> 
> > My workaround was to simply replace the entire patch.
> 
> you should use the quilt workflow and edit/refresh the patch once and copy
> it back to metadata once for all yes.

Or devtool modify, change the patch in the resulting git repository, then 
devtool update-recipe -a.

Cheers,
Paul

-- 

Paul Eggleton
Intel Open Source Technology Centre