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## arg 1:  the new package version
post_install() {
  id slurm >&/dev/null
  if [ $? -ne 0 ]; then
    echo -e "\e[34;1m==>\e[39;1m Adding slurm system group... \e[0m"
    groupadd -g 64030 -r slurm
    [ $? -ne 0 ] && groupadd -r slurm

    echo -e "\e[34;1m==>\e[39;1m Adding slurm system user... \e[0m"
    useradd -r -c "Slurm Daemon" -d /var/log/slurm-llnl -g slurm -u 64030 slurm
    [ $? -ne 0 ] && useradd -r -c "Slurm Daemon" -d /var/log/slurm-llnl -g slurm slurm

    echo -e "\e[34;1m==>\e[39;1m Locking Slurm User Account...\e[0m"
    passwd -l slurm &>/dev/null
  fi

  # securing the log dir
  if [ -d /var/log/slurm-llnl ]; then
    chown -R slurm:slurm /var/log/slurm-llnl
  fi

  echo -e "\e[34;1m==>\e[39;1m NOTE: You have to create a slurm configuration-file in /etc/slurm-llnl/ \e[0m"
  echo -e "\e[34;1m==>\e[39;1m prior to starting any slurm daemons. \e[0m"
  echo -e "\e[34;1m==>\e[39;1m NOTE: In order for new optional dependencies to be taken into account \e[0m"
  echo -e "\e[34;1m==>\e[39;1m slurm-llnl has to be recompiled. \e[0m"
}

## arg 1:  the new package version
## arg 2:  the old package version
post_upgrade() {
  echo -e "\e[34;1m==>\e[39;1m NOTE: In order for new optional dependencies to be taken into account \e[0m"
  echo -e "\e[34;1m==>\e[39;1m slurm-llnl has to be recompiled. \e[0m"

  # THIS HAS TO BE REMOVED ONEDAY - TODO
  if [ -f /etc/slurm/slurm.conf ]; then
    mv /etc/slurm/* /etc/slurm-llnl/
    rmdir /etc/slurm
    echo -e "\e[34;1m==>\e[39;1m Your configuration-files were moved from /etc/slurm to /etc/slurm-llnl ! \e[0m"
  fi
}

## arg 1:  the old package version
pre_remove() {
  which systemctl >& /dev/null
  if [ $? -eq 0 ]; then
    echo -e "\e[34;1m==>\e[39;1m Stopping slurm daemons through SystemD... \e[0m"
    systemctl stop slurmd.service
    systemctl stop slurmdbd.service
    systemctl stop slurmctld.service

    echo -e "\e[34;1m==>\e[39;1m Disabling SystemD related file(s)... \e[0m"
    systemctl disable slurmd.service
    systemctl disable slurmdbd.service
    systemctl disable slurmctld.service
  else
    echo -e "\e[34;1m==>\e[39;1m Stopping slurm daemons... \e[0m"
    /etc/rc.d/slurm stop
    /etc/rc.d/slurmdbd stop
  fi
}

## arg 1:  the old package version
post_remove() {
  echo -e "\e[34;1m==>\e[39;1m Removing slurm system user/group... \e[0m"
  userdel slurm

  # deleting remnant recusivly (there shell be now links!)
  rm -rf /var/lib/slurm-llnl

  # notifying the user of kept dirs
  [ -d /etc/slurm-llnl ] && echo -e "\e[34;1m==>\e[39;1m NOTE: Custom configuration-file(s) in /etc/slurm-llnl/ were kept on your system.\e[0m"
  [ -d /var/log/slurm-llnl ] && echo -e "\e[34;1m==>\e[39;1m NOTE: Logfiles were preserved. They reside under /var/log/slurm-llnl .\e[0m"
}