Simple script to inspect container layers mediatypes and whether they can be pulled or not

inspect_image.sh

#!/bin/bash
IMAGE="docker://cilium/startup-script"
print_mediatypes(){
    echo "Media types of manifest at $1"
    info=$(sudo skopeo inspect --raw $1)
    echo "Manifest MediaType $(echo $info | jq -r '.config.mediaType')"
    echo "Layers:"
    echo $info | jq -r '.layers[]| "    Layer: \(.digest) MediaType = \(.mediaType)"'
}

for tag in $(sudo skopeo list-tags $IMAGE | jq -r '.Tags[]'); do
    echo ""
    echo ""
    echo Tag: $tag
    manifests=$(sudo skopeo inspect --raw $IMAGE:$tag | jq -r '.manifests[].digest' 2>/dev/null)
    if [ -z "$manifests" ]; then
        echo "plain manifest"
        print_mediatypes $IMAGE:$tag
    else
        echo "Iterating over nested manifests:"
        for manifest in $manifests; do
            print_mediatypes $IMAGE@$manifest
        done
    fi  

    echo ""
    echo -n "Can be pulled? "
    sudo podman pull $IMAGE:$tag > /dev/null 2>&1 && echo "Yes" || echo "No"
done