publish

#!/usr/bin/env bash
#
# Usage:
#  publish
#
# This program publishes the cyverse/irods image on Dockerhub. Each build is
# tagged with `new`.

set -o errexit -o nounset -o pipefail

EXEC_DIR="$(dirname "$(realpath --canonicalize-existing "$0")")"
readonly EXEC_DIR

readonly IMAGE_NAME=cyverse/irods
readonly NEW_IMAGE="$IMAGE_NAME":new
readonly CUR_IMAGE="$IMAGE_NAME":latest

main() {
	local irodsVer
	IFS= read -r irodsVer < "$EXEC_DIR"/VERSION

	local newId
	newId="$(docker image inspect "$NEW_IMAGE" | jq .[0].Id)"

	local curId
	if docker pull "$IMAGE_NAME" 2> /dev/null; then
		curId="$(docker image inspect "$CUR_IMAGE" 2> /dev/null | jq .[0].Id)" || true
	fi

	if [[ "$newId" != "${curId-}" ]]; then
		local now
		now="$(date --utc '+%Y-%m-%dT%H-%M-%S')"

		local tag
		for tag in "$irodsVer"_"$now" "$irodsVer" latest; do
			publish "$tag"
		done
	fi
}

publish() {
	local tag="$1"

	local imageTag="$IMAGE_NAME":"$tag"

	docker tag "$NEW_IMAGE" "$imageTag"
	docker push "$imageTag"
}

main "$@"