#!/bin/bash

set -eo pipefail

if [ -z "${HERMIT_STATE_DIR}" ]; then

  case "$(uname -s)" in

  Darwin)

    export HERMIT_STATE_DIR="${HOME}/Library/Caches/hermit"

    ;;

  Linux)

    export HERMIT_STATE_DIR="${XDG_CACHE_HOME:-${HOME}/.cache}/hermit"

    ;;

  esac

fi

export HERMIT_DIST_URL="${HERMIT_DIST_URL:-https://github.com/cashapp/hermit/releases/download/stable}"

HERMIT_CHANNEL="$(basename "${HERMIT_DIST_URL}")"

export HERMIT_CHANNEL

export HERMIT_EXE=${HERMIT_EXE:-${HERMIT_STATE_DIR}/pkg/hermit@${HERMIT_CHANNEL}/hermit}

if [ ! -x "${HERMIT_EXE}" ]; then

  echo "Bootstrapping ${HERMIT_EXE} from ${HERMIT_DIST_URL}" 1>&2

  curl -fsSL "${HERMIT_DIST_URL}/install.sh" | /bin/bash 1>&2

fi

exec "${HERMIT_EXE}" --level=fatal exec "$0" -- "$@"