[yocto] Image specific configuration files

[Ulf Samuelsson]

Here is the idea developed at Atlas Copco.

Not my code, but I thought it useful for this problem


define three bbclasses.

production.bbclass, rnd.bbclass, release.bbclass containing:

==========================

# Class for use in BBCLASSEXTEND to make it easier to have a single recipe that
# build and generate packages separately for release and normal images.
#
# Usage:
# BBCLASSEXTEND = "release"

CLASSOVERRIDE .= ":class-release"

python release_virtclass_handler () {
    # Do nothing if this is inherited, as it's for BBCLASSEXTEND
    if "release" not in (d.getVar('BBCLASSEXTEND') or ""):
        bb.error("Don't inherit release, use BBCLASSEXTEND")
        return

    # Restore BPN
    bpn = d.getVar('BPN')
    newbpn = bpn.replace('-release', '')
    d.setVar('BPN', newbpn)

    # Use default FILESPATH searching for patches and files
    filespath = d.getVar('FILESPATH', True)
    newfilespath = filespath.replace('-release', '')
    d.setVar('FILESPATH', newfilespath)
}

addhandler release_virtclass_handler
release_virtclass_handler[eventmask] = "bb.event.RecipePreFinalise"

==========================

In a bbappend you use the classes:


==========================

SRC_URI_append_class-production = " \
    file://rcS.production \
"

SRC_URI_append_class-rnd = " \
    file://rcS.rnd \
"

SRC_URI_append_class-release = " \
    file://rcS.release \
"

do_install_append_class-production () {
    install -m 755 ${WORKDIR}/rcS.production ${D}${sysconfdir}/init.d/rcS
}

do_install_append_class-rnd () {
    install -m 755 ${WORKDIR}/rcS.rnd ${D}${sysconfdir}/init.d/rcS
}

do_install_append_class-release () {
    install -m 755 ${WORKDIR}/rcS.release ${D}${sysconfdir}/init.d/rcS
}

BBCLASSEXTEND = "production rnd release"


==========================

In your production image you add

IMAGE_INSTALL_append = "busybox-production"


Do something similar for the other two.

BR

Ulf Samuelsson

________________________________
Från: yocto-bounces at yoctoproject.org <yocto-bounces at yoctoproject.org> för Damien LEFEVRE <lefevre.da at gmail.com>
Skickat: den 1 juni 2018 13:17:53
Till: Iván Castell
Kopia: Yocto discussion list
Ämne: Re: [yocto] Image specific configuration files

Thanks a lot everyone, this is very helpful =)

On Fri, Jun 1, 2018 at 2:14 PM, Iván Castell <icastell at nayarsystems.com<mailto:icastell at nayarsystems.com>> wrote:


2018-06-01 11:24 GMT+02:00 Alexander Kanavin <alex.kanavin at gmail.com<mailto:alex.kanavin at gmail.com>>:
I have to say defining multiple distros and then tweaking recipes according to those definitions is not a good practice, as recipes should generally only access DISTRO_FEATURES and otherwise be distro-agnostic. The above iptables scenario should be handled with different image recipes, which pull in (via packages) or create different configurations.


That has sense. We will refactorize our Yocto repo as suggested. Always very helpfull with all your comments Mr Alexander. Thank you very much! :)



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