Re: [isar-cip-core][RFC 1/2] copy and symlink dpkg db to ro-rootfs

["MOESSBAUER, Felix" <felix.moessbauer@siemens.com>]

On Tue, 2024-02-13 at 11:33 +0100, Jan Kiszka wrote:
> > > >  image_configure_fstab() {
> > > >      sudo tee '${IMAGE_ROOTFS}/etc/fstab' << EOF
> > > >  # Begin /etc/fstab
> > > > diff --git a/recipes-core/cip-read-only-rootfs/cip-read-only-
> > > > rootfs_0.1.bb b/recipes-core/cip-read-only-rootfs/cip-read-
> > > > only-
> > > > rootfs_0.1.bb
> > > > new file mode 100644
> > > > index 0000000..76453ab
> > > > --- /dev/null
> > > > +++ b/recipes-core/cip-read-only-rootfs/cip-read-only-
> > > > rootfs_0.1.bb
> > > > @@ -0,0 +1,26 @@
> > > > +#
> > > > +# CIP Core, generic profile
> > > > +#
> > > > +# Copyright (c) Siemens AG, 2024
> > > > +#
> > > > +# Authors:
> > > > +#  Felix Moessbauer <felix.moessbauer@siemens.com>
> > > > +#
> > > > +# SPDX-License-Identifier: MIT
> > > > +
> > > > +# Note: This requires debhelper-compat 13, which limits it to
> > > > bookworm
> > > > +
> > > > +inherit dpkg
> > > > +
> > > > +SRC_URI = " \
> > > > +    file://${BPN}.tmpfiles \
> > > > +    file://control"
> > > > +
> > > > +do_prepare_build[cleandirs] += "${S}/debian"
> > > > +do_prepare_build() {
> > > > +    deb_debianize
> > > > +    rm -f ${S}/debian/compat
> > > > +    cp ${WORKDIR}/control \
> > > > +       ${WORKDIR}/${BPN}.tmpfiles \
> > > > +       ${S}/debian/
> > > 
> > > dpkg-raw wouldn't have simplified this? I think even compat is
> > > not
> > > customizable.
> > 
> > DPKG raw in general is only useful for a trivial copy of files into
> > the
> > rootfs. Here, we need the debhelper logic to process the
> > tmpfiles.d.
> > Also, we need to update the compat mode so that these debhelpers
> > become
> > active. I don't see any value in mixing this with dpkg-raw, as most
> > parts would need to be written manually anyways.
> > 
> 
> With [1] (granted, not yet upstream), this would simply be

This is already merged into ISAR-next (as f1b8679), but as we only
reference ISAR-master in CIP, we need to wait for that to get
integrated there as well. I can prepare everything, but still we need
to wait for the ISAR update.

Putting the ISAR list in CC.

Felix


> 
> inherit dpkg-raw
> 
> DPKG_ARCH = "all"
> 
> SRC_URI = "file://${BPN}.tmpfiles"
> 
> do_install() {
>         cp ${WORKDIR}/${BPN}.tmpfiles ${S}/debian/
> }
> 
> 
> The whole control file would become obsolete.
> 
> Jan
> 
> [1]
> https://groups.google.com/d/msgid/isar-users/20240201101236.3555681-1-Quirin.Gylstorff%40siemens.com
> 

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