Tim Lauridsen wrote:
The mayor problem with roleback is that you can't reverse the changes
done by scriptlets in RPM, so it is not posible to do downgrade in a
safeway.
EX.
rpm -ivh foo
rpm -e foo
these commands add a package and remove it again.
the state of the system might not be the same before and after these
commands, so a safe rollback is not possible.
Further to what Alastair says later in the thread:
what if a yum plugin stored the information about what a script file
actions looked like before/after the rpm install modified a file ?
yum install foo
[foo renamed /etc/foo.cfg to /etc/foo.cfg.rpmold: versioned at ...]
[foo created /etc/foo.cfg: versioned at /var/cache/rollback/...]
I guess that is a bit simplified; it's not just config files that can
get modified in scriptlets. Perhaps you could version the /etc/ folder
and commit any change after each yum transaction ?
DaveT.
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