#!/bin/bash

image_tag () {

local name; local remove; local id

# tags an image 
#  -i <imagetag or id>  <newimagetag>

[[ $# -lt 1 ]] && echo "image base name required" && exit 
[[ $1 == "-r" ]] && remove=true && shift 1
[[  $1 == "-i" ]] && { shift 1; id=$1; } || id=$(image_id $1)
name=$(image_name "$1")
[[ ! $id ]] && { echo "no image with id:$id name:$name"; return 1; }   

if [[ $2 ]];then
# echo making tag for $2  $(image_name $2)
docker tag $id  $(image_name $2)
else
 [[ $remove ]] && docker rmi $name || echo to remove an image tag use -r
fi
image_tags $id
}

image_delete () {
  docker rmi -f "$@"
}