#!/bin/bash
# shellcheck disable=SC1004

set -e

images=('debian:buster|buster' 'debian:bullseye|bullseye' 'ubuntu:focal|focal')

BASENAME='exim-encrypt-dlfunc-build'
TAG='latest'
REGISTRY='localhost:5000'
USERNAME='nobody'
PASSWORD='password'

while getopts "r:u:p:b:t:" OPTION; do
    case $OPTION in
        r)
            REGISTRY="${OPTARG}"
            ;;
        u)
            USERNAME="${OPTARG}"
            ;;
        p)
            PASSWORD="${OPTARG}"
            ;;
        b)
            BASENAME="${OPTARG}"
            ;;
        t)
            TAG="${OPTARG}"
            ;;
        *)
            echo "Usage: $0 [OPTIONS]"
	    echo
	    echo "Options:"
	    echo "  -r <registry> (default: \"${REGISTRY}\")"
	    echo "  -u <username> (default: \"${USERNAME}\")"
	    echo "  -p <password> (default: \"${PASSWORD}\")"
	    echo "  -b <basename> (default: \"${BASENAME}\")"
	    echo "  -t <tag>      (default: \"${TAG}\")"
	    echo
            exit 127
    esac
done

REGHOST="$(echo "${REGISTRY}" | cut -d/ -f1)"
if [ "${REGISTRY}" != "none" ]; then
	echo "🔑 Logging into »${REGHOST}«"
	if ! buildah login --get-login "${REGHOST}" > /dev/null 2> /dev/null; then
		buildah login --password "${PASSWORD}" --username "${USERNAME}" "${REGHOST}"
	fi
fi

for i in "${images[@]}"; do
	basectr=$(echo "${i}" | cut -d'|' -f1)
	name=$(echo "${i}" | cut -d'|' -f2)

	IMAGENAME="${BASENAME}-${name}"
	IIDFILE=".${IMAGENAME}.iid"
	IMAGETAG="${BASENAME}-${name}:${TAG}"
	TARGET="${REGISTRY}/${IMAGETAG}"
	echo "🔨 Assembling »${IMAGENAME}«"
	buildah build-using-dockerfile \
		--from "${basectr}" \
		--format docker \
		--iidfile "${IIDFILE}" \
		--tag "${IMAGETAG}"
		--build-arg BUILDTIMESTAMP="`date --iso-8601=seconds`"

	if [ "${REGISTRY}" != "none" ]; then
		echo "🚀 Pushing »${IMAGETAG}« to »${TARGET}«"
		buildah push "${IMAGETAG}" "${TARGET}"
		echo "✅ Finished »${BASENAME}«"
	fi

	rm -f "${IIDFILE}"
done