Re: apt-mark hold package within postinst

["Roberto A. Foglietta" <roberto.foglietta@gmail.com>]

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Il Ven 23 Set 2022, 12:56 Henning Schild <henning.schild@siemens.com> ha
scritto:

> Am Fri, 23 Sep 2022 11:58:53 +0200
> schrieb "Roberto A. Foglietta" <roberto.foglietta@gmail.com>:
>
> > Il Ven 23 Set 2022, 11:22 Roberto A. Foglietta
> > <roberto.foglietta@gmail.com> ha scritto:
> >
> > > Hi all,
> > >
> > >  .deb repackaged should not upgrade with any external source so they
> > > should marked on hold. Easy but not possible to do within postinst
> > > obviously. Not in a straight way, at least. Am I wrong?
> > >
>
> I you rebuild you should add some suffix to PV
>
> CHANGELOG_V ?= "${PV}+roberto"
>
> During installation of isar itself your rebuilt package will win
> anyways. Make sure to add it to IMAGE_INSTALL instead of PREINSTALL, or
> make sure to have a bitbake DEPENDS if it comes in via a debian dep
> chain.
>
> But during lifetime any apt-get upgrade could replace yours when debian
> brings an update. To deal with that it is best to deploy a preferences
> file with some dpkg-raw configuration package.
>
> roberto-pin_0.1.bb:
> inherit dpkg-raw
> do_install() {
>   echo -e "Package: *\nPin: version *+roberto*\nPin-Priority: 1000" >
>     ${D}/etc/apt/preferences.d/${PN}
> }
>
> With this all packages that have the roberto suffix will become
> non-replaceable ... unless someone uses that same suffix.
>
> Generally you want to try and mainline all your changes to avoid local
> rebuilds.
>
> Another trick would be an empty package that conflicts with anything
> greater than "${PV}+roberto", that should also prevent updates. Not
> sure which way is better.
>
> We mostly build images that are replaces as a whole and will not get
> much "apt-get" during their life. Note that kernel updates with apt-get
> will not easily work in an isar built image. It will depend on your
> bootloader whether it might work, and you might have to add scripts
> that update bootloader configs after kernel install.
>

Dear Henning,

 first of all, thank you for your explanation. I think about it and I
arrived to the conclusion that your solution is good but top definitive for
my need/goals.

The problem is 1. that even wintout any update available the original
packages are seen as updates and 2. I wish to avoid that the user upgrade
the repackaged packages installing the dependencies I removed.

However, I am not interested in make their upgrade difficult. Probably, I
will keep only hold the packages at the installation but even remove the
holding as configuration.

Just a way to avoid that kids break up the system just with a basic admin
operation without further complications.

Best regards, R-

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