Update RPM script for Rocky Linux 9

This uses the 'dist' RPM macro instead of relying on the version information of
CentOS packages.  This approach works on CentOS 7 and 8 as well.

Author: teemuke-kk

Diff for: pkg/rpm/generate_rpms.sh

@@ -5,10 +5,7 @@ DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" >/dev/null 2>&1 && pwd )"
 version=$(grep KEYDB_REAL_VERSION $DIR/../../src/version.h | awk '{ printf $3 }' | tr -d \")
 release=1 # by default this will always be 1 for keydb version structure. If build release version needs to be update you can modify here
 arch=$(uname -m)
-dist=el$(rpm -q --queryformat '%{VERSION}' centos-release | cut -d. -f1)
-if [[ "$dist" == "elpackage centos-release is not installed" ]]; then
-        dist=el$(rpm -q --queryformat '%{VERSION}' centos-linux-release  | cut -d. -f1)
-fi
+dist=$(rpm --eval '%{?dist}')
 
 if [[ "$arch" != "aarch64" ]] && [[ "$arch" != "x86_64" ]]; then
 	echo "This script is only valid and tested for aarch64 and x86_64 architectures. You are trying to use: $arch"
@@ -39,8 +36,8 @@ sed -i -E "1a\Version     : $version" $DIR/keydb_build/keydb.spec
 sed -i '3d' $DIR/keydb_build/keydb.spec
 sed -i -E "2a\Release     : $release%{?dist}" $DIR/keydb_build/keydb.spec
 
-mkdir -p /root/rpmbuild/BUILDROOT/keydb-$version-$release.$dist.$arch
-cp -r $DIR/keydb_build/keydb_rpm/* /root/rpmbuild/BUILDROOT/keydb-$version-$release.$dist.$arch/
+mkdir -p /root/rpmbuild/BUILDROOT/keydb-$version-$release$dist.$arch
+cp -r $DIR/keydb_build/keydb_rpm/* /root/rpmbuild/BUILDROOT/keydb-$version-$release$dist.$arch/
 rpmbuild -bb $DIR/keydb_build/keydb.spec
 mv /root/rpmbuild/RPMS/$arch/* $DIR/rpm_files_generated