[yocto] Per image customizations

[Diego]

In data mercoledì 1 giugno 2016 15:25:09, Oleksandr Poznyak ha scritto:
> Don't forget to add your fstab/inittab files into CONFFILES_${PN} cause if
> the package that includes them will be changed and You'll update it via
> package system, your POSTPROCESS hacks will be overwritten.
> 
> Anyway, its better to avoid POSTPROCESS if possible.
> 1) Create *.bbappend recipe base-files_%s.bbappend in your layer. It
> appends to poky "base-files" recipe.
> 2) Create your own "python do_package_prepend" function where you should
> make your recipe produce two different packages
> 3) Add them to DEPENDS in your image recipe
> 

Hi Oleksandr,

your approach is really interesting, but I'm unsure how to proceed with step 
2) of your list.

I've added the following in the bbappend:

python do_package_prepend() {
    d.setVar('PACKAGES', "${PACKAGES} ${PN}-fstab-regular ${PN}-fstab-flash")
}

which creates the two additional packages, but then I'm confused on how to 
manage the two 'variant' fstab files. The FILES variable doesn't support 
"source -> destination", so how do I manage the fact that two different files 
need to go to the same destination path?

An easier option would be to remove fstab in the base-files_%s.bbappend, and 
create 2 different .bb recipes for the 2 fstab files.

Thanks anyhow for your help,
Diego