#!/bin/sh
# postinst script for monit-cn
#
# see: dh_installdeb(1)

set -e

# summary of how this script can be called:
#        * <postinst> `configure' <most-recently-configured-version>
#        * <old-postinst> `abort-upgrade' <new version>
#        * <conflictor's-postinst> `abort-remove' `in-favour' <package>
#          <new-version>
#        * <deconfigured's-postinst> `abort-deconfigure' `in-favour'
#          <failed-install-package> <version> `removing'
#          <conflicting-package> <version>
# for details, see http://www.debian.org/doc/debian-policy/ or
# the debian-policy package
#

case "$1" in
    configure|reconfigure)
      # continue below
    ;;

    *)
        exit 0
    ;;
esac

# import CN-functions
. /usr/share/carnet-tools/functions.sh

# check if monitrc is ours
installfile=1
if [ -e /etc/monit/monitrc ]; then
    if ! grep -q "CARNet package monit-cn" /etc/monit/monitrc; then
        installfile=1
        mv -f /etc/monit/monitrc /etc/monit/monitrc.dpkg-old
    else
        installfile=0
    fi
fi
if [ $installfile -eq 1 ]; then
    echo "CN: Installing default monitrc in /etc/monit/monitrc"
    cp -a /usr/share/monit-cn/monitrc /etc/monit/monitrc
    chmod u=rw,go= /etc/monit/monitrc
fi

# sed monitrc with proper hostname
if grep -q '@localhost' /etc/monit/monitrc; then
    CARNET_HOSTNAME=`hostname`
    CARNET_DOMAINNAME=`hostname --domain`
    cp_check_and_sed '@localhost' \
        "s/@localhost/@$CARNET_HOSTNAME.$CARNET_DOMAINNAME/g" \
        /etc/monit/monitrc || true
fi

# migrate to "but not on { instance }" alerting style
cp_check_and_sed '^set alert [^[:space:]]*@[^[:space:]]* ' \
    's/^set alert \([^[:space:]]*@[^[:space:]]*\) .*$/set alert \1 but not on { instance }/g' \
    /etc/monit/monitrc || true

# migrate from old hierarchy
if [ -d /etc/monit.d ]; then
    find /etc/monit.d -type f -print0 | xargs -0r -I% mv % /etc/monit/conf.d || true
    rmdir /etc/monit.d >/dev/null 2>&1 || true
fi

# (re)generate monit.d files
update-monit.d || true

# disable monit startup
cp_check_and_sed '^startup[[:space:]]*=[[:space:]]*0' \
    's/^startup[[:space:]]*=.*/startup=1/g' /etc/default/monit || true
cp_check_and_sed '^START[[:space:]]*=[[:space:]]*no' \
    's/^START[[:space:]]*=.*/START=yes/g' /etc/default/monit || true

# remove us from systemv monit script
if grep -q 'CARNet package monit-cn' /etc/init.d/monit; then
  echo "CN: Removing monit workaround from /etc/init.d/monit -- systemd is in use"
  cp-update -r monit-cn /etc/init.d/monit
  chmod +x /etc/init.d/monit
fi

service monit restart

#DEBHELPER#

exit 0