[Mageia-dev] Switching from Cooker to Cauldron?

Thu Jun 9 14:37:38 CEST 2011

2011/6/9 Christiaan Welvaart <cjw at daneel.dyndns.org>:
+> On Thu, 9 Jun 2011, Olav Vitters wrote:
+>
+>> I'm guessing if I attempt to switch to Cauldron, it likely cannot read
+>> the rpm5 database.
+>>
+>> I can only think of a few things:
+>> 1. Create a new partition, install Mageia 1 on that, switch to Cauldron,
+>> install all the non-automatic installed packages, copy stuff from the
+>> Cauldron partition to the existing one
+>> -> Not too sure about the copying. I've modified various things over the
+>> years (e.g. special Postfix setup and so on)
+>
+> You can look for all config files you changed (probably using an rpm
+> command) and copy/merge those on the new system. Can be quite a bit of work.
+>
+>> 2. Just attempt to install Cauldron, forcefully reinstall the packages,
+>> and ignore the rpm difference
+>> -> I think this will fail though
+>
+> You can wipe out the package database, but then after installing all
+> non-automatic installed packages, you'll probably have many files
+> unaccounted for (not owned by any installed package). Not a good idea
+> probably. Also all pre/post install scripts will be ran in new install mode
+> instead of upgrade mode. I did something like this with a VM (that isn't
+> very important to me) and I'm still finding new problems in it (but it works
+> anyway).
+>
+>> 3. Somehow export/downgrade the 'rpm5' info to rpm4. Is this possible
+>> and how?
+>
+> There is supposedly a script that can convert the package database both ways
+It's implemented in C using rpm & berkeley db api, so it's not a script.. ;)
+> in mdv, but nobody probably tried this yet.
+Not true, the functionality has even been implemented to be automatically
+used when installing older releases with urpmi.
+
+We're actually relying on it when installing older releases into clean
+chroots on
+cooker for building backports. :)
+
+The code in question should be trivial to swipe and implement in Mageia, I did
+offer to help with this previously, but with no interest..
+--
+Regards,
+Per Øyvind
+