[yocto] Per image customizations

[Oleksandr Poznyak]

Here is the content of bbappend recipe for base-files recipe:

FILESEXTRAPATHS_append := "${THISDIR}/${PN}"

SRC_URI += "file://fstab-flash \
        file://fstab-regular \
        "

PACKAGES += " ${PN}-flash ${PN}-regular"
CONFFILES_${PN}-flash = "${CONFFILES_${PN}}"
CONFFILES_${PN}-regular = "${CONFFILES_${PN}}"

pkg_preinst_${PN}-flash = "${pkg_preinst_${PN}}"
pkg_preinst_${PN}-regular = "${pkg_preinst_${PN}}"

RREPLACES_${PN}-flash = "${PN}"
RPROVIDES_${PN}-flash = "${PN}"
RCONFLICTS_${PN}-flash = "${PN}"

RREPLACES_${PN}-regular = "${PN}"
RPROVIDES_${PN}-regular = "${PN}"
RCONFLICTS_${PN}-regular = "${PN}"

python populate_packages_prepend() {
    import shutil

    packages = ("${PN}-flash", "${PN}-regular")
    for package in packages:
        # copy ${PN} content to packages
        shutil.copytree("${PKGD}", "${PKGDEST}/%s" % package, symlinks=True)
        # replace fstab
        if package == "${PN}-flash":
            shutil.copy("${WORKDIR}/fstab-flash",
"${PKGDEST}/${PN}-flash/etc/fstab")
        else:
            shutil.copy("${WORKDIR}/fstab-regular",
"${PKGDEST}/${PN}-regular/etc/fstab")
}


This will produce two separate packages that will replace base-files
package.
Moreover, this trick allows You to modify base-files package separately for
flash-OS and regular-OS

in other recipes add packages like this:

base-files-flash or base-files-regular

Thanks,
Oleksandr Poznyak!

On Wed, Jun 1, 2016 at 7:15 PM, Diego <diego.ml at zoho.com> wrote:

> 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
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.yoctoproject.org/pipermail/yocto/attachments/20160601/268419e2/attachment.html>