#!/usr/bin/env bash

set -e

name="$(basename $0)"

: ${TOP_DIR:="$( cd "$( dirname "${BASH_SOURCE[0]}" )/.." && pwd )"}

source ${TOP_DIR}/docker/builder-include

usage () {
	echo "${name} - Builds the petitboot programs using a pb-builder container." >&2
	echo "Usage: ${name} [flags]" >&2
	echo "Option flags:" >&2
	echo "  -c --check       - Run 'make check'." >&2
	echo "  -d --dry-run     - Do not run docker commands." >&2
	echo "  -h --help        - Show this help and exit." >&2
	echo "  -i --interactive - Run an interactive pb-builder container." >&2
	echo "  -t --tag         - Print Docker tag to stdout and exit." >&2
	echo "  -v --verbose     - Verbose execution." >&2
	echo "Environment:" >&2
	echo "  DOCKER_TAG       - Default: '${DOCKER_TAG}'" >&2
	echo "Examples:" >&2
	echo "  ${name} -vc"
	echo "  ${name} -v"
}

short_opts="cdhitv"
long_opts="check,dry-run,help,interactive,tag,verbose"

opts=$(getopt --options ${short_opts} --long ${long_opts} -n "${name}" -- "$@")

if [ $? != 0 ]; then
	echo "${name}: ERROR: Internal getopt" >&2 
	exit 1
fi

eval set -- "${opts}"

while true ; do
	case "${1}" in
	-c | --check)
		check=1
		shift
		;;
	-d | --dry-run)
		dry_run=1
		shift
		;;
	-h | --help)
		usage=1
		shift
		;;
	-i | --interactive)
		interactive=1
		shift
		;;
	-t | --tag)
		tag=1
		shift
		;;
	-v | --verbose)
		set -x
		verbose=1
		shift
		;;
	--)
		shift
		break
		;;
	*)
		echo "${name}: ERROR: Internal opts" >&2 
		exit 1
		;;
	esac
done

if [[ -n "${usage}" ]]; then
	usage
	exit 0
fi

if [[ -n "${tag}" ]]; then
	show_tag
	exit 0
fi

docker_base_args="\
	--rm \
	-v /etc/group:/etc/group:ro \
	-v /etc/passwd:/etc/passwd:ro \
	-v ${TOP_DIR}:/opt/pb \
	-w /opt/pb \
"

docker_user_args="-u $(id -u):$(id -g)"

if [[ -n "${interactive}" ]]; then
	cd "${TOP_DIR}"
	docker_args="${docker_base_args}"
	run_cmd "docker run -it ${docker_args} ${DOCKER_TAG} /bin/bash"
	exit
fi

if [[ -n "${verbose}" ]]; then
	bash_debug="-x"
fi

if [[ -n "${check}" ]]; then
	docker_extra="make check"
else
	docker_extra="true"
fi

cd "${TOP_DIR}"
docker_args="${docker_base_args} ${docker_user_args}"
run_cmd "docker run ${docker_args} ${DOCKER_TAG} /bin/bash \
	-e ${bash_debug} \
	-c './bootstrap && ./configure --with-ncurses && make && ${docker_extra}'"