#!/bin/bash

here="$(realpath $(dirname "$0"))"
toplevel="$(realpath "$here/../..")"
group_args=()
docker_args=()

for gid in $(id -G); do
    group_args+=(--group-add "$gid")
done

interactive=

if [[ "$1" = -* ]]; then
    while [[ "$1" != "--" && $# != 0 ]]; do
	case "$1" in
	    --*)
		if [[ "$1" = --interactive || "$1" = --interactive=true ]]; then
		    interactive=y
		fi
		;;
	    -*)
		if [[ "$1" = -*i* ]]; then
		    interactive=y
		fi
		;;
	    *)
		;;
	esac
	docker_args+=("$1")
	shift
    done
    if [[ "$1" != "--" ]]; then
	echo "Expected '--' to terminate docker flag list"
	exit 1
    fi
    shift
fi

MAVEN_LOCAL_REPO="$HOME/.m2"

mkdir -p "$MAVEN_LOCAL_REPO"

docker_common_args=(
       --network host \
       -u "$(id -u):$(id -g)" \
       "${group_args[@]}" \
       --cap-add SYS_PTRACE \
       -v "$PWD:$PWD:z" \
       -v "$toplevel:$toplevel:z" \
       -v /tmp:/tmp:z \
       -v "$MAVEN_LOCAL_REPO:$MAVEN_LOCAL_REPO:z" \
       -v /etc/passwd:/etc/passwd:ro \
       -v /etc/group:/etc/group:ro \
       -v /etc/localtime:/etc/localtime:ro \
       -w "$PWD" \
       "${docker_args[@]}" \
       "$(<"$here/image")" \
       "$@"
)

if [[ -n "$interactive" ]]; then
    # If --interactive was given on the command line, we can't run in detached mode
    # as it will be impossible to interact with the container.
    exec docker run --rm "${docker_common_args[@]}"
fi

container=$(
    docker run \
       "--detach=true" \
       "${docker_common_args[@]}"
)

kill_it() {
    if [[ -n "$container" ]]; then
        docker rm -f "$container" > /dev/null
        container=
    fi
}

trap kill_it SIGTERM SIGINT SIGHUP EXIT

docker logs --follow "$container"

if [[ -n "$container" ]]; then
    exitcode="$(docker wait "$container")"
else
    exitcode=99
fi

kill_it

trap - SIGTERM SIGINT SIGHUP EXIT

# after "docker kill", docker wait will not print anything
[[ -z "$exitcode" ]] && exitcode=1

exit "$exitcode"