[OE-core] [PATCH v2 2/2] devtool: update-recipe: create config fragment

[Markus Lehtonen]

On Thu, 2016-02-18 at 15:19 +0000, Christopher Larson wrote:
> 
> 
> On Thu, Feb 18, 2016 at 7:19 AM Markus Lehtonen <
> markus.lehtonen at linux.intel.com> wrote:
> > Create config fragment if the user makes modifications to kernel
> > config.
> > User may change .config e.g. by directly editing it or by running
> > the
> > 'do_menuconfig' bitbake task. Devtool generates one monolithic
> > fragment
> > by simply doing a diff between .config and .config.baseline files
> > in the
> > source directory.  If either of these files is missing, the config
> > fragment is not gerenrated or updated. The output is a file,
> > 'devtool-fragment.cfg' that gets added to SRC_URI in the recipe (as
> > well
> > as copied into the 'oe-local-files' directory if that is present in
> > the
> > source tree).
> > 
> > ${S}/.config will be a symlink to ${B}/.config. We need to do this
> > as
> > devtool is not able to access ${B} because ${B} is set in a
> > .bbappend in
> > the workspace layer which is not parsed by devtool itself.
> > 
> > [YOCTO #8999]
> > 
> > Signed-off-by: Markus Lehtonen <markus.lehtonen at linux.intel.com>
> If the devtool-fragment.cfg already exists, what's the behavior? Will
> it update it with both the old and new changes, or will it create a
> second fragment?
Currently, it will update the existing fragment.
   - Markus
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