Inspect intermediate Docker images

docker_child_images.sh

#!/bin/bash

set -eu

# Usage: ./docker_child_images.sh <image name>

image_name_or_id=$1
sha1=$(docker images -a | grep $image_name_or_id | head -n 1 | column -t | sed 's/ \+/,/g' | cut -d, -f3)

if [ ! -z "$sha1" ]; then
    # echo "$sha1"
    docker images -a --no-trunc | grep $sha1
fi

while [ ! -z "$sha1" ]; do
    sha1=$(docker inspect $sha1 | grep Parent | cut -d'"' -f4 | cut -d":" -f2)
    if [ ! -z "$sha1" ]; then
        # echo "$sha1"
        docker images -a --no-trunc | grep $sha1
    fi
done