registry_down() {
    REGISTRY_ID=$(docker ps -qa -f name=registry)
    if [[ ! -z ${REGISTRY_ID} ]]; then
        log Removing docker registry
        docker rm -fv "${REGISTRY_ID}" &>> "${LOG_FILE}"
    fi
}

registry_list_images() {
    FILES=($(find ${DEFINITION_DEPOT} -type f -name '*.yaml'))

    HOSTNAME_REGEX='[a-zA-Z0-9][a-zA-Z0-9_-]{0,62}'
    DOMAIN_NAME_REGEX="${HOSTNAME_REGEX}(\.${HOSTNAME_REGEX})*"
    PORT_REGEX='[0-9]+'
    NETLOC_REGEX="${DOMAIN_NAME_REGEX}(:${PORT_REGEX})?"

    REPO_COMPONENT_REGEX='[a-zA-Z0-9][a-zA-Z0-9_-]{0,62}'
    REPO_REGEX="${REPO_COMPONENT_REGEX}(/${REPO_COMPONENT_REGEX})*"

    TAG_REGEX='[a-zA-Z0-9][a-zA-Z0-9.-]{0,127}'

    cat "${FILES[@]}" \
        | grep -v '^ *#' \
        | tr ' \t' '\n' | tr -s '\n' \
        | grep -E "^(${NETLOC_REGEX}/)?${REPO_REGEX}:${TAG_REGEX}$" \
        | sort -u \
        | grep -v 'registry:5000'
}

registry_populate() {
    log Validating local registry is populated
    for image in $(registry_list_images); do
        if [[ ${image} =~ promenade ]]; then
            continue
        fi

        if [[ ${image} =~ .*:(latest|master) ]] || ! docker pull "localhost:5000/${image}" &> /dev/null; then
            log Loading image "${image}" into local registry
            {
                docker pull "${image}"
                docker tag "${image}" "localhost:5000/${image}"
                docker push "localhost:5000/${image}"
            } &>> "${LOG_FILE}" || echo "Failed to cache ${image}"
        fi
    done
}

registry_replace_references() {
    FILES=(${@})
    for image in $(registry_list_images); do
        sed -i "s;${image}\$;registry:5000/${image};g" "${FILES[@]}"
    done
}

registry_up() {
    log Validating local registry is up
    REGISTRY_ID=$(docker ps -qa -f name=registry)
    RUNNING_REGISTRY_ID=$(docker ps -q -f name=registry)
    if [[ -z ${RUNNING_REGISTRY_ID} && ! -z ${REGISTRY_ID} ]]; then
        log Removing stopped docker registry
        docker rm -fv "${REGISTRY_ID}" &>> "${LOG_FILE}"
    fi

    if [[ -z ${RUNNING_REGISTRY_ID} ]]; then
        log Starting docker registry
        docker run -d \
            -p 5000:5000 \
            -e REGISTRY_HTTP_ADDR=0.0.0.0:5000 \
            --restart=always \
            --name registry \
            -v "${REGISTRY_DATA_DIR}:/var/lib/registry" \
                "${IMAGE_DOCKER_REGISTRY}" &>> "${LOG_FILE}"
    fi
}