mirror/mirror.sh

#!/usr/bin/env bash

# The Docker Image Mirror script.

WHAT_TO_MIRROR=()
DESTINATION_REGISTRY=code.pztrn.name/containers/mirror
REGISTRY_USER=$1
REGISTRY_PASSWORD=$2

MIRROR_CONFIGS=$(ls ./images/*.sh)
for file in "${MIRROR_CONFIGS[@]}"; do
	echo "Importing ${file}..."
	# shellcheck disable=SC2086
	WHAT_TO_MIRROR=( "${WHAT_TO_MIRROR[@]}" "$(bash ${file})" )
done

echo "Images to mirror: ${WHAT_TO_MIRROR[*]}"

function mirror() {
	image=$1
	image_name=$(echo "${image}" | cut -d":" -f 1)
	image_version=$(echo "${image}" | cut -d":" -f 2)

	echo -n "Mirroring ${image}... "
	if ! docker pull "${image}" &> /dev/null; then
		echo "FAIL"
		exit
	fi

	image_hash=$(docker images -a | grep "^${image_name}" | grep "${image_version}" | awk "{' print $3 '}")
	echo -n "${image_hash} received... "

	if ! docker tag "${image_hash}" "${DESTINATION_REGISTRY}/${image}" &> /dev/null; then
		echo "FAIL"
		exit
	fi

	echo -n "pushing... "
	if ! docker push "${REGISTRY_TO_MIRROR}/${image}" &> /dev/null; then
		echo "FAIL"
		exit
	fi

	echo "OK"

	docker image rm "${image}" &> /dev/null
	docker image rm "${REGISTRY_TO_MIRROR}/${image}" &> /dev/null
}

env
# shellcheck disable=SC2154
echo "Secret test: ${drone_secret} or ${REGISTRY_PASSWORD}"

# Login to registry.
docker login -u "${REGISTRY_USER}" -p "${REGISTRY_PASSWORD}" "${DESTINATION_REGISTRY}"

# Mirror images.
for image in "${WHAT_TO_MIRROR[@]}"; do
	mirror "${image}"
done