List all available tags for a given docker image

dockertags.sh

dockertags() {
    if [ -z ${1+x} ] || [ $# -ne 1 ]; then
        echo "Usage: ${0} <image name>"
    else
        local namespace="library"
        local repository=$1

        if [[ $1 == *"/"* ]]; then
            namespace=${1%/*}
            repository=${1#*/}
        fi

        curl -sS "https://registry.hub.docker.com/v2/repositories/${namespace}/${repository}/tags/" | jq -r 'try .results[].name catch "Image not found."' | sort
    fi
}