split packages

How to customise /etc/fstab per image ? /etc/fstab is provided by base-files.

• create base-files-X and base-files-Y packages with the same content as base-files with only changed /etc/fstab: https:// yocto.yoctoproject.narkive.com/XcannnRd/per-image-customizations
• Search in Yocto for python populate_packages and see what others do

Adapted solution from 1st link almost works. Until SPDX fails because base-files-devel provides base-files.

PACKAGES += "${PN}-devel"
PROVIDES += "${PN}-devel"
CONFFILES:${PN}-devel = "${CONFFILES:${PN}}"
 
 
RREPLACES:${PN}-devel = "${PN}"
RCONFLICTS:${PN}-devel = "${PN}"
 
# ${PN}-devel also provides ${PN} - for compatibility with other packages
# But it breaks SPDX generation in do_rootfs so disable it
RPROVIDES:${PN}-devel = "${PN}"
 
CVE_PRODUCT:${PN}-devel = "base-files"
 
python populate_packages:prepend() {
    import shutil
 
    packages = ("${PN}-devel",)
    # PKGD (Package Destination Directory): This is the directory where files are
    # staged before they are split into individual packages. It represents the intermediate,
    # unsplit state of the files that do_install has already installed.
    #
    # PKGDEST (Package Destination): This is the parent directory where packages reside after they have
    # been split. It is often referred to as the packages-split directory, containing subdirectories for
    # each package (e.g., pkg-name, pkg-name-dbg, pkg-name-dev).
 
    preinst = d.getVar('pkg_preinst:${PN}')
    for package in packages:
        d.setVar(d.expand(f"pkg_preinst:{package}"), preinst)
        # copy ${PN} content to other packages
        shutil.copytree(d.expand("${PKGD}"), d.expand("${PKGDEST}"+ f"/{package}"), symlinks=True)
        # replace fstab
        if package == "${PN}-devel":
            shutil.copy(d.expand("${WORKDIR}/fstab-devel"), d.expand("${PKGDEST}/${PN}-devel/etc/fstab"))
}
 
INSANE_SKIP:${PN}-devel += "empty-dirs"

Create second .bb file and include content of original file.