docker_list_depdendent_images

#!/bin/bash
#
# based on https://stackoverflow.com/a/41176677 by Simon Brady

help() {
   echo 'usage: docker_list_depdendent_images [-nh] [-v] [-r] IMAGE_ID'
   echo '       docker_list_depdendent_images --help'
   echo
   echo '    -nh - do not output header'
   echo '    -v  - verbose image info output'
   echo '    -r  - recursive (dependencies of depencies)'
   echo "          (TODO: doesn' work yet)"
   echo
   exit 1
}

[ "$1" == "--help" ] && help

recursion_options=()

if [ "$1" == "-nh" ]; then
  header=false
  shift
else
  header=true
fi
# we do not output headers when recursing
recursion_options+=("-nh")

if [ "$1" == "-v" ]; then
  verbose=true
  if [ "$header" == "true" ]; then
    docker images | head -n 1 # output header
  fi
  recursion_options+=("-v")
  shift
else
  verbose=false
fi

if [ "$1" == "-r" ]; then
  recursive=true
  recursion_options+=("-r")
  shift
else
  recursive=false
fi

IMAGE_ID="$1"

get_dependent_image_ids() {
  local IMAGE_ID="$1"
  for i in $(docker images -q); do
    docker history $i \
    | grep -q "$IMAGE_ID" \
    && if [ "$i" != "$IMAGE_ID" ]; then
         echo "$i"
       fi
  done
}

show_image_info() {
  local IMAGE_ID="$1"
  if [ "$verbose" == "true" ]; then
    docker image ls | grep "$IMAGE_ID"
  else
    echo "$IMAGE_ID"
  fi 
}

set -e          # stop on error
set -u          # stop on undefined variable
set -o pipefail # stop part of pipeline failing

get_dependent_image_ids "$IMAGE_ID" \
| sort -u \
| while read DEPENDEND_IMAGE_ID; do
    show_image_info "$DEPENDEND_IMAGE_ID"
    if [ "$recursive" == "true" ]; then
      recursion_options+=("$DEPENDEND_IMAGE_ID")
      $0 "${options[@]}"
    fi
  done