#!/usr/bin/env bash

. $(dirname $0)/util

TAG=$1
REPO=$2
PUSH=$3

set -eu -o pipefail

: ${PLATFORMS=linux/amd64}
: ${CONTINUOUS_INTEGRATION=}

progressFlag=""
if [ "$CONTINUOUS_INTEGRATION" == "true" ]; then progressFlag="--progress=plain"; fi

gitTag=$(git describe --tags --match "v[0-9]*")

usage() {
	echo "usage: $0 <tag> <repo> [push]"
	exit 1
}

if [ -z "$TAG" ] || [ -z "$REPO" ]; then
	usage
fi

imageDocker() {
	if echo $PLATFORMS | grep , >/dev/null; then
		echo "PREFER_BUILDCTL=1 needs to be set to build images for $PLATFORMS"
		exit 1
	fi
	set -x
	DOCKER_BUILDKIT=1 docker build $progressFlag --platform=$PLATFORMS -t $REPO:$TAG .
	DOCKER_BUILDKIT=1 docker build $progressFlag --platform=$PLATFORMS -t $REPO:$TAG-rootless --target rootless .
	set +x

	if [ "$PUSH" = "push" ]; then
		set -x
		docker push $REPO:$TAG
		docker push $REPO:$TAG-rootless
		set +x
	fi
	if [[ "$gitTag" == "$TAG" ]]; then
		set -x
		docker tag $REPO:$TAG $REPO:latest
		docker tag $REPO:$TAG-rootless $REPO:rootless
		set +x
		if [ "$PUSH" = "push" ]; then
			set -x
			docker push $REPO:latest
			docker push $REPO:rootless
			set +x
		fi
	fi
}

image() {
	pushFlag=""
	if [ "$PUSH" = "push" ]; then
		pushFlag="push=true"
	fi

	tagLatest=""
	tagLatestRootless=""
	if [[ "$gitTag" == "$TAG" ]]; then
		tagLatest=",$REPO:latest"
		tagLatestRootless=",$REPO:rootless"
	fi

	set -x

	buildctl build $progressFlag --frontend=dockerfile.v0 \
		--local context=. --local dockerfile=. \
		--opt platform=$PLATFORMS \
		--export-cache type=inline \
		--output type=image,\"name=$REPO:$TAG$tagLatest\",$pushFlag

	buildctl build $progressFlag --frontend=dockerfile.v0 \
		--local context=. --local dockerfile=. \
		--opt target=rootless \
		--opt platform=$PLATFORMS \
		--export-cache type=inline \
		--output type=image,\"name=$REPO:$TAG-rootless$tagLatestRootless\",$pushFlag
}

case $buildmode in
"buildkit")
	image
	;;
"docker-buildkit")
	imageDocker
	;;
*)
	echo "Unsupported build mode: $buildmode" >&2
	exit 1
	;;
esac