#!/usr/bin/env bash

MACHINE=${MACHINE:-talircd-build}
MACHINE_PATH=/var/lib/machines/${MACHINE}
PROJECT_ROOT=${PROJECT_ROOT:-$(git rev-parse --show-toplevel)}
DIST_DIR=${DIST_DIR:-${PROJECT_ROOT}/_dist}

CODENAME=bullseye
MIRROR=${MIRROR:-http://debian.csail.mit.edu/debian/}

function init() {
    # TODO: fakeroot ?
    set -x
    sudo debootstrap \
         --include=ocaml-base,ocaml,opam,ca-certificates,git,rsync \
         --components=main,contrib \
         ${CODENAME} ${MACHINE_PATH} ${MIRROR}
}

function cleanall() {
    set -x
    sudo rm -rf ${MACHINE_PATH}
}

function in_container() {
    set -x
    mkdir -p ${DIST_DIR}

    sudo systemd-nspawn -q \
         --machine ${MACHINE} \
         --bind-ro ${PROJECT_ROOT}:/root/talircd \
         --bind ${DIST_DIR}:/root/dist:rootidmap \
         -E OPAMROOTISOK=1 \
         "$@"
}

function clean() {
    rm -rf ${DIST_DIR}/root
    in_container rm -rf /root/.opam
}

function build() {
    in_container --chdir /root /root/talircd/deploy/_build.sh
}

function shell() {
    in_container
}

case ${1:-build} in
    init) init ;;
    build) build ;;
    clean) clean ;;
    cleanall) cleanall ;;
    shell) shell ;;
    *)
      echo "invalid command $1"
esac