PREUN

/bin/sh

if [ "$1" = "0" ]; then
  cd /var/lib/urpmi
  rm -f compss provides depslist* descriptions.* *.cache hdlist.* synthesis.hdlist.* list.*
  cd /var/cache/urpmi
  rm -rf partial/* headers/* rpms/*
fi
exit 0

POSTIN

/usr/bin/perl

use urpm::media;
if (-e "/etc/urpmi/urpmi.cfg") {
    $urpm = new urpm;
    urpm::media::read_config($urpm);
    urpm::media::update_media($urpm, nolock => 1, nopubkey => 1);
}

Triggers

urpmi < 4.10.6

/bin/sh

if [ -d /var/lib/urpmi ]; then
   cd /var/lib/urpmi
   for i in hdlist*.cz; do 
      if [ -e "synthesis.$i" ]; then
        echo "forcing synthesis.$i to be regenerated"	
        rm "synthesis.$i"
	# needed to ensure synthesis has "suggests"
      fi
   done
fi