ubuntu-phone team mailing list archive

[Oliver Grawert <ogra@xxxxxxxxxx>]

Am Donnerstag, den 28.05.2015, 13:36 +0200 schrieb Niklas Wenzel:
> Hi all,
> 
> 
> I am wondering how the image based update mechanism handles manually
> installed Debian packages.
> 
very simple, it doesn't 

the system image update is a diff between two rootfs builds ... during
update the rootfs is made readwrite and the diff is applied on top of
the usually readonly rootfs ... thats it ...

if you have modified any files that existed before, they get reverted
(this includes the package db ! ) ... if you added single files that
didn't exist before on the image these will not be touched. 

if you installed a .deb package manually with a newer version the info
from the package db will be gone/reverted (see above) and changed files
will be reverted.

if you don't keep your system constantly writeable but only make it
shortly writeable to install a deb for testing and then switch back to
readonly system-image updates you might get through with that, but i
wouldn't count on it ...

ciao
	oli