#!/busybox/sh

set -euo pipefail

export PATH=$PATH:/kaniko/

REGISTRY=${PLUGIN_REGISTRY:-docker.io}

if [ "${PLUGIN_USERNAME:-}" ] || [ "${PLUGIN_PASSWORD:-}" ]; then
	REGISTRY_AUTH=`echo -n "${PLUGIN_USERNAME}:${PLUGIN_PASSWORD}" | base64 | tr -d "\n"`

	cat > /kaniko/.docker/config.json <<EOF
{
	"auths": {
		"${REGISTRY}": {
			"auth": "${REGISTRY_AUTH}"
		}
	}
}
EOF
fi

if [ "${PLUGIN_JSON_KEY:-}" ];then
	echo "${PLUGIN_JSON_KEY}" > /kaniko/gcr.json
	export GOOGLE_APPLICATION_CREDENTIALS=/kaniko/gcr.json
fi

DOCKERFILE=${PLUGIN_DOCKERFILE:-Dockerfile}
CONTEXT=${PLUGIN_CONTEXT:-$PWD}
LOG=${PLUGIN_LOG:-info}
EXTRA_OPTS=""

if [[ -n "${PLUGIN_TARGET:-}" ]]; then
	TARGET="--target=${PLUGIN_TARGET}"
fi

if [[ "${PLUGIN_SKIP_TLS_VERIFY:-}" == "true" ]]; then
	EXTRA_OPTS="--skip-tls-verify=true"
fi

if [[ "${PLUGIN_CACHE:-}" == "true" ]]; then
	CACHE="--cache=true"
fi

if [ -n "${PLUGIN_CACHE_REPO:-}" ]; then
	CACHE_REPO="--cache-repo=${REGISTRY}/${PLUGIN_CACHE_REPO}"
fi

if [ -n "${PLUGIN_CACHE_TTL:-}" ]; then
	CACHE_TTL="--cache-ttl=${PLUGIN_CACHE_TTL}"
fi

if [ -n "${PLUGIN_BUILD_ARGS:-}" ]; then
	BUILD_ARGS=$(echo "${PLUGIN_BUILD_ARGS}" | tr ',' '\n' | while read build_arg; do echo "--build-arg=${build_arg}"; done)
fi

if [ -n "${PLUGIN_BUILD_ARGS_FROM_ENV:-}" ]; then
	BUILD_ARGS_FROM_ENV=$(echo "${PLUGIN_BUILD_ARGS_FROM_ENV}" | tr ',' '\n' | while read build_arg; do echo "--build-arg ${build_arg}=$(eval "echo \$$build_arg")"; done)
fi

# Simply auto-tagging
if [[ "${PLUGIN_AUTO_TAG:-}" == "true" ]]; then
	
	if [[ "${PLUGIN_TAG_STRIP_V:-}"  == "true" ]]; then
		TAG=$(echo "${CI_COMMIT_TAG:-}" | sed 's/^v//g')
	else
		TAG="${CI_COMMIT_TAG}"
	fi

	if [ ! -n "${TAG:-}" ]; then
		echo "latest" > .tags
	else
		echo "${TAG},latest" > .tags
	fi
fi

if [ -n "${PLUGIN_TAGS:-}" ]; then
	DESTINATIONS=$(echo "${PLUGIN_TAGS}" | tr ',' '\n' | while read tag; do echo "--destination=${REGISTRY}/${PLUGIN_REPO}:${tag} "; done)
elif [ -f .tags ]; then
	DESTINATIONS=$(cat .tags| tr ',' '\n' | while read tag; do echo "--destination=${REGISTRY}/${PLUGIN_REPO}:${tag} "; done)
elif [ -n "${PLUGIN_REPO:-}" ]; then
	DESTINATIONS="--destination=${REGISTRY}/${PLUGIN_REPO}:latest"
else
	DESTINATIONS="--no-push"
	# Cache is not valid with --no-push
	CACHE=""
fi

COMMAND=$(tr -d "\n" <<-EOF
/kaniko/executor -v ${LOG} 
	--context=${CONTEXT} 
	--dockerfile=${DOCKERFILE} 
	${EXTRA_OPTS} 
	${DESTINATIONS} 
	${CACHE:-} 
	${CACHE_TTL:-} 
	${CACHE_REPO:-} 
	${TARGET:-} 
	${BUILD_ARGS:-} 
	${BUILD_ARGS_FROM_ENV:-}
EOF
)

echo "+ ${COMMAND}"
eval "${COMMAND}"