# arg 1:  the new package version
post_install() {
  echo "==> mpd: Create a config under /etc/mpd.conf before using MPD (Example: /etc/mpd.conf.example)"
  groupadd -g 45 mpd &>/dev/null
  useradd -u 45 -g mpd -d /var/lib/mpd -s /bin/true mpd &>/dev/null
  gpasswd -a mpd audio &>/dev/null
  chown mpd:mpd -R /var/{lib,log,run}/mpd
}

# arg 1:  the new package version
# arg 2:  the old package version
post_upgrade() {
  echo "==> mpd: upgrade from 0.11 -> 0.12: configuration file syntax changed, "
  echo "==> mpd: make sure to update your configuration file! See example conf: /etc/mpd.conf.example"
  echo "==> mpd: If you install any of the optional dependencies, you will have to rebuild this package."
  post_install $1
}

# arg 1:  the old package version
pre_remove() {
  userdel mpd &>/dev/null
}

op=$1
shift

$op $*