[SOLVED] RPM spec file find installed version

Issue

I need to find the previous version of the package (if installed already) when installing rpm. My spec file as follows

In POST

%post if [ "$1" = "1" ]; then # Perform new install fi elif [ "$1" = "2" ]; then # Perform update # what I need is value for Version if [ $Version = 1.0]; then # do upgrade 1 fi elif [ "$Version" = "2" ]; then #do upgrade 2 fi

fi

In the above code, how can i obtain value for the Version. I tried using executing rpm-qi | grep <rpm_package> is there any other methods available?

Solution

Do not check version. Check if the data are old or new.

See: https://fedoraproject.org/wiki/Packaging:ScriptletSnippets#Saving_state_between_scriptlets

%pre
grep OLDDATA /etc/myconfig >/dev/null && touch %{_localstatedir}/lib/rpm-state/%{name}.DoSomethingLater

%posttrans
if [ -e %{_localstatedir}/lib/rpm-state/%{name}.DoSomethingLater ]; then
# do some conditional stuff
rm -f %{_localstatedir}/lib/rpm-state/%{name}.DoSomethingLater
fi

Answered By - msuchy

Answer Checked By - Terry (WPSolving Volunteer)