## arg 1:  the new package version
#pre_install() {
# do something here
#}

## arg 1:  the new package version
post_install() {
  id -u weave >/dev/null 2>&1
  if [ $? -eq 1 ]; then
    echo Adding weave user/group.
    groupadd -f weave
    useradd -m -d /var/lib/weave/ -g weave -s /usr/bin/nologin weave
  fi
}

## arg 1:  the new package version
## arg 2:  the old package version
#pre_upgrade() {
# do something here
#}

## arg 1:  the new package version
## arg 2:  the old package version
#post_upgrade() {
# do something here
#}

## arg 1:  the old package version
#pre_remove() {
# do something here
#}

## arg 1:  the old package version
#post_remove() {
# do something here
#}