user="riak"
group="riak"
home="/opt/riak"

# arg 1:  the new package version
post_install() {
  useradd -r -s /sbin/nologin -d "$home" "$user"
  chown -R "$user:$group" "$home"
  chmod a+x "$home"
}

# arg 1:  the new package version
# arg 2:  the old package version
post_upgrade() {
    cat <<EOF
==> WARNING! Riak configuration (or even storage backend) may changed since
==> the last version, check http://basho.com/ for changelog...
EOF
}

# arg 1:  the old package version
pre_remove() {
  systemctl stop riak &> /dev/null
  userdel "$user" &> /dev/null
  groupdel "$group" &> /dev/null

  cat <<EOF
==> WARNING! /opt/riak/data has not been deleted.
EOF
}