[yocto] Layer Priority with Wildcard .bbappend Files

[Stevens, Nick]

Hi Paul,

> > I verified this by building an image - the sysctl.conf that ends up in
> > the final image is the one from meta-bsp, not the one from meta-custom.
> > But if I switch the name of base-files_%.bbappend in meta-custom to
> > base-files_3.0.14.bbappend, this is what I get:
> > >      # $FILESEXTRAPATHS [5 operations]
> > >      #   set poky/meta/conf/documentation.conf:172
> > >      #     [doc] "Extends the search path the OpenEmbedded build
> system
> > >      uses when looking for files and patches as it processes recipes
> and
> > >      append files." #   _prepend
> > >      meta-bsp/recipes-core/base-files/base-files_3.0.14.bbappend:3 #
> > >      "meta-bsp/recipes-core/base-files/base-files:"
> > >      #   _prepend
> > >      meta-custom/recipes-core/base-files/base-files_3.0.14.bbappend:6
> #
> > >        "meta-custom/recipes-core/base-files/base-files:"
> > >      #   set data_smart.py:432 [finalize]
> > >      #     "meta-bsp/recipes-core/base-files/base-files:"
> > >      #   set data_smart.py:432 [finalize]
> > >      #
> > >      "meta-custom/recipes-core/base-files/base-files:meta-bsp/recipes-
> cor
> > >      e/base-files/base-files:" # computed:
> > >      #
> > >      "meta-custom/recipes-core/base-files/base-files:meta-bsp/recipes-
> cor
> > >      e/base-files/base-files:"
> > >      FILESEXTRAPATHS="meta-custom/recipes-core/base-files/base-
> files:meta
> > >      -bsp/recipes-core/base-files/base-files:">
> > > And now the sysctl.conf file is being pulled from meta-custom.
> 
> That absolutely should not happen. If you change it back does it revert to
> the version from meta-bsp? The wildcarding should not change the order in
> which the files are applied. The only corner case I can think of would be
> if the layer priority values are the same number - this isn't the case is
> it?

The behavior does reappear if I change the file name back to a wildcard. And no, the layers are different priorities - meta-custom is priority 8 and meta-bsp is priority 6.

Definitely sounds like there's some unexpected behavior here. I am going to dig in some more and see if I can find a limited test case that reproduces the issue, and then I'll get a bug report opened.

Thanks!
Nick