Delete a remote OCI image (if supported) (docker/podman registry)

oci-image-rm-remote.sh

#!/usr/bin/env bash

if [[ -z "$*" ]]; then
        echo -e "Usage:\n\t$(basename "$0") \$SERVER/\$IMAGE:\$TAG [delete]"
        echo "Omit the 'delete' argument to query the manifest for the image"
        echo "Use 'delete' to actually perform deletion"
    exit 0
fi

REGISTRY_SERVER="$(echo "$1" | cut -d/ -f1)"
REGISTRY_IMAGE="$(echo "$1" | sed "s|$REGISTRY_SERVER/||")"
IMAGE_NAME="$(echo "$REGISTRY_IMAGE" | cut -d: -f1)"
IMAGE_TAG="$(echo "$REGISTRY_IMAGE" | cut -d: -f2)"

BASE_URI="http://$REGISTRY_SERVER/v2"
ACCEPT_MANIFEST_HEADER='Accept: application/vnd.oci.image.manifest.v1+json'
QUERY_URI="$BASE_URI/$IMAGE_NAME/manifests/$IMAGE_TAG"

OCI_MANIFEST="$(set -x; curl -s -H "$ACCEPT_MANIFEST_HEADER" "$QUERY_URI")"
OCI_DIGEST="$(echo "$OCI_MANIFEST" | jq -r .config.digest | cut -d: -f2)"
MANIFEST_URI="$BASE_URI/$IMAGE_NAME/manifests/$OCI_DIGEST"

if [[ "$2" = delete ]]; then
    (set -x; curl -s -H "$ACCEPT_MANIFEST_HEADER" -X DELETE "$MANIFEST_URI")
else
    echo "$OCI_MANIFEST" | jq .
fi