Delete docker image:tag

deleteImageTag.sh

#!/bin/bash
set -euo pipefail
set -x
fullimage=${IMAGE:-$1}
image=${fullimage##*/}
repo=${image%%:*}
tag=${image##*:}
REG=${fullimage%%/*}
PROTO=https://
set +x

curl -fSIso /dev/null -H "Accept:application/vnd.docker.distribution.manifest.v2+json" "$PROTO$REG/v2/$repo/manifests/$tag"
response=$(curl -v -s -H "Accept:application/vnd.docker.distribution.manifest.v2+json" "$PROTO$REG/v2/$repo/manifests/$tag" 2>&1)
digest=$(echo "$response" | grep -i "< Docker-Content-Digest:"|awk '{print $3}')
digest=${digest//[$'\t\r\n']}
echo "DIGEST: $digest"

result=$(curl -s -o /dev/null -w "%{http_code}" -H "Accept:application/vnd.docker.distribution.manifest.v2+json" -X DELETE "$PROTO$REG/v2/$repo/manifests/$digest")
if [ $result -eq 202 ]; then
    echo "Successfully deleted"
    exit 0
else
    echo "Failed to delete: $result"
    exit 3
fi