#!/usr/bin/env sh

[ "$(id -u)" -eq 0 ] || { echo 'You need to be ROOT (sudo can be used)' ; exit 1 ;}

. /log2ram.conf  # Include config to check if size is enought (See below) 

# See if we can find out the init-system
echo 'Try to detect init and running log2ram service...'
if [ "$(systemctl --version 2> /dev/null)" != '' ] ; then
  INIT='systemd'
elif [ "$(rc-service --version 2> /dev/null)" != '' ] ; then
  INIT='openrc'
fi

case "$INIT" in
  systemd)
    systemctl -q is-active log2ram  && { echo 'ERROR: log2ram service is still running. Please run "sudo service log2ram stop" to stop it.' ; exit 1 ;} ;;
  openrc)
    rc-service log2ram status >/dev/null 2>&1  && { echo 'ERROR: log2ram service is still running. Please run "sudo rc-service log2ram stop" to stop it.' ; exit 1 ;} ;;
  *) echo 'ERROR: could not detect init-system' ; exit 1
  ;;
esac

echo "Installing log2ram for $INIT init-system"
# log2ram
mkdir -p /usr/local/bin/
install -m 755 log2ram /usr/local/bin/log2ram
install -m 644 log2ram.conf /etc/log2ram.conf
install -m 644 uninstall.sh /usr/local/bin/uninstall-log2ram.sh
if [ "$INIT" = 'systemd' ] ; then
  install -m 644 log2ram.service /etc/systemd/system/log2ram.service
  systemctl enable log2ram
elif [ "$INIT" = 'openrc' ] ; then
  install -m 755 log2ram.initd /etc/init.d/log2ram
  rc-update add log2ram boot
fi

# cron
if [ "$INIT" = 'systemd' ] ; then
  install -m 755 log2ram.cron /etc/cron.daily/log2ram
elif [ "$INIT" = 'openrc' ] ; then
  install -m 755 log2ram.openrc_cron /etc/cron.daily/log2ram
fi
install -m 644 log2ram.logrotate /etc/logrotate.d/log2ram

# Remove a previous log2ram version
rm -rf /var/log.hdd

# Make sure we start clean
rm -rf /var/hdd.log

# Check if var SIZE is sufficient and show a warning when too small
if [ -n "$(du -sh -t "$SIZE" /var/log | cut -f1)" ] ; then  # /var/log should be ok on all systems
  echo 'WARNING: Variable SIZE in /etc/log2ram.conf is too small to store the /var/log!'
  echo 'Actual size of /var/log is:' ; du -sh /var/log
fi

echo '#####         Reboot to activate log2ram!         #####'
echo '##### Edit /etc/log2ram.conf to configure options #####'